isap 3rd round optimizations

isap/Implementations/crypto_aead/README.md

-### Folder Structure:
+**Folder Structure:**
 
-* **isapa128av20**
-  * Code for ISAP128a using Ascon-p.
-* **isapa128v20**
-  * Code for ISAP128 using Ascon-p.
-* **isapk128av20**
-  * Code for ISAP128a using Keccak-p[400].
-* **isapk128v20**
-  * Code for ISAP128 using Keccak-p[400].
-* **isapxv20**
-  * A common codebase that can be used to build reference code for all four instances of ISAP.
+- `isapa128av20`: Code for ISAP128a using Ascon-p (primary recommendation).
+- `isapa128v20`: Code for ISAP128 using Ascon-p.
+- `isapk128av20`: Code for ISAP128a using Keccak-p[400].
+- `isapk128v20`: Code for ISAP128 using Keccak-p[400].
+- `isapxv20`: A generic codebase that can be used to build reference code for all four instances of ISAP.
 

isap/Implementations/crypto_aead/isapa128av20/avx_512/api.h

+#ifndef API_H
+#define API_H
+
+#define CRYPTO_VERSION "2.0.1"
+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/avx_512/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;  
+    
+	// Ciphertext length is mlen + tag length
+	*clen = mlen+ISAP_TAG_SZ;
+
+	// Encrypt plaintext and Generate tag
+	unsigned char *tag = c+mlen;
+	isap_mac_enc(k,npub,ad,adlen,c,mlen,m,mlen,tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen-ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char tag[ISAP_TAG_SZ];
+	isap_mac(k,npub,ad,adlen,c,*mlen,tag);
+
+	// Compare tag
+	unsigned long eq_cnt = 0;
+	for(unsigned int i = 0; i < ISAP_TAG_SZ; i++) {
+		eq_cnt += (tag[i] == c[(*mlen)+i]);
+	}
+
+	// Perform decryption if tag is correct
+	if(eq_cnt == (unsigned long)ISAP_TAG_SZ){
+		if (*mlen > 0) {
+			isap_enc(k,npub,c,*mlen,m);
+		}
+		return 0;
+	} else {
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/avx_512/isap.c

+#include <stdio.h>
+#include <string.h>
+#include <immintrin.h>
+#include "api.h"
+#include "isap.h"
+
+typedef unsigned char u8;
+typedef unsigned long long u64;
+typedef unsigned long u32;
+typedef long long i64;
+
+const u8 ISAP_IV1[] = {0x01,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
+const u8 ISAP_IV2[] = {0x02,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
+const u8 ISAP_IV3[] = {0x03,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
+
+#define RATE (64 / 8)
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+
+#define ROTR(x,n) (((x)>>(n))|((x)<<(64-(n))))
+#define EXT_BYTE(x,n) ((u8)((u64)(x)>>(8*(7-(n)))))
+#define INS_BYTE(x,n) ((u64)(x)<<(8*(7-(n))))
+
+#define U64BIG(x) \
+    ((ROTR(x, 8) & (0xFF000000FF000000ULL)) | \
+     (ROTR(x,24) & (0x00FF000000FF0000ULL)) | \
+     (ROTR(x,40) & (0x0000FF000000FF00ULL)) | \
+     (ROTR(x,56) & (0x000000FF000000FFULL)))
+
+#define ROUND(C) ({\
+    x2 ^= C;\
+    x0 ^= x4;\
+    x4 ^= x3;\
+    x2 ^= x1;\
+    t0 = x0;\
+    t4 = x4;\
+    t3 = x3;\
+    t1 = x1;\
+    t2 = x2;\
+    x0 = t0 ^ ((~t1) & t2);\
+    x2 = t2 ^ ((~t3) & t4);\
+    x4 = t4 ^ ((~t0) & t1);\
+    x1 = t1 ^ ((~t2) & t3);\
+    x3 = t3 ^ ((~t4) & t0);\
+    x1 ^= x0;\
+    t1  = x1;\
+    x1 = ROTR(x1, R[1][0]);\
+    x3 ^= x2;\
+    t2  = x2;\
+    x2 = ROTR(x2, R[2][0]);\
+    t4  = x4;\
+    t2 ^= x2;\
+    x2 = ROTR(x2, R[2][1] - R[2][0]);\
+    t3  = x3;\
+    t1 ^= x1;\
+    x3 = ROTR(x3, R[3][0]);\
+    x0 ^= x4;\
+    x4 = ROTR(x4, R[4][0]);\
+    t3 ^= x3;\
+    x2 ^= t2;\
+    x1 = ROTR(x1, R[1][1] - R[1][0]);\
+    t0  = x0;\
+    x2 = ~x2;\
+    x3 = ROTR(x3, R[3][1] - R[3][0]);\
+    t4 ^= x4;\
+    x4 = ROTR(x4, R[4][1] - R[4][0]);\
+    x3 ^= t3;\
+    x1 ^= t1;\
+    x0 = ROTR(x0, R[0][0]);\
+    x4 ^= t4;\
+    t0 ^= x0;\
+    x0 = ROTR(x0, R[0][1] - R[0][0]);\
+    x0 ^= t0;\
+})
+
+#define ROUNDAVX(C1,C2) ({\
+    x2a = _mm_ternarylogic_epi64(x2a, _mm_set_epi64x (C1, C2), x1a, 0x96);\
+    x0a =_mm_xor_si128 (x0a, x4a);\
+    x4a =_mm_xor_si128 (x4a, x3a);\
+    t0a = x0a;\
+    t4a = x4a;\
+    t3a = x3a;\
+    t1a = x1a;\
+    t2a = x2a;\
+    x0a = _mm_ternarylogic_epi64(t0a, t1a, t2a, 0xd2);\
+    x2a = _mm_ternarylogic_epi64(t2a, t3a, t4a, 0xd2);\
+    x4a = _mm_ternarylogic_epi64(t4a, t0a, t1a, 0xd2);\
+    x1a = _mm_ternarylogic_epi64(t1a, t2a, t3a, 0xd2);\
+    x3a = _mm_ternarylogic_epi64(t3a, t4a, t0a, 0xd2);\
+    x1a =_mm_xor_si128 (x1a, x0a);\
+    x3a =_mm_xor_si128 (x3a, x2a);\
+    x0a =_mm_xor_si128 (x0a, x4a);\
+    t0a = _mm_ror_epi64(x0a, R[0][0]);\
+    t1a = _mm_ror_epi64(x0a, R[0][1]);\
+    t2a = _mm_ror_epi64(x1a, R[1][0]);\
+    t3a = _mm_ror_epi64(x1a, R[1][1]);\
+    x0a = _mm_ternarylogic_epi64(x0a, t0a, t1a, 0x96);\
+    x1a = _mm_ternarylogic_epi64(x1a, t2a, t3a, 0x96);\
+    t0a = _mm_ror_epi64(x2a, R[2][0]);\
+    t1a = _mm_ror_epi64(x2a, R[2][1]);\
+    t2a = _mm_ror_epi64(x3a, R[3][0]);\
+    t3a = _mm_ror_epi64(x3a, R[3][1]);\
+    x2a = _mm_ternarylogic_epi64(x2a, t0a, t1a, 0x69);\
+    x3a = _mm_ternarylogic_epi64(x3a, t2a, t3a, 0x96);\
+    t0a = _mm_ror_epi64(x4a, R[4][0]);\
+    t1a = _mm_ror_epi64(x4a, R[4][1]);\
+    x4a = _mm_ternarylogic_epi64(x4a, t0a, t1a, 0x96);\
+})
+
+#define P12 ({\
+    ROUND(0xf0);\
+    ROUND(0xe1);\
+    ROUND(0xd2);\
+    ROUND(0xc3);\
+    ROUND(0xb4);\
+    ROUND(0xa5);\
+    ROUND(0x96);\
+    ROUND(0x87);\
+    ROUND(0x78);\
+    ROUND(0x69);\
+    ROUND(0x5a);\
+    ROUND(0x4b);\
+})
+
+#define P6 ({\
+    ROUND(0x96);\
+    ROUND(0x87);\
+    ROUND(0x78);\
+    ROUND(0x69);\
+    ROUND(0x5a);\
+    ROUND(0x4b);\
+})
+
+#define P6_avx_first ({\
+    ROUNDAVX(0xf0,0x96);\
+    ROUNDAVX(0xe1,0x87);\
+    ROUNDAVX(0xd2,0x78);\
+    ROUNDAVX(0xc3,0x69);\
+    ROUNDAVX(0xb4,0x5a);\
+    ROUNDAVX(0xa5,0x4b);\
+})
+
+#define P6_avx_second ({\
+    ROUNDAVX(0x96,0x96);\
+    ROUNDAVX(0x87,0x87);\
+    ROUNDAVX(0x78,0x78);\
+    ROUNDAVX(0x69,0x69);\
+    ROUNDAVX(0x5a,0x5a);\
+    ROUNDAVX(0x4b,0x4b);\
+})
+
+#define P1 ({\
+    ROUND(0x4b);\
+})
+
+static const int R[5][2] = {
+    {19, 28}, {39, 61}, {1, 6}, {10, 17}, {7, 41}
+};
+
+#define ABSORB_LANES(src, len) ({ \
+    u32 rem_bytes = len; \
+    u64 *src64 = (u64 *)src; \
+    u32 idx64 = 0; \
+    while(1){ \
+        if(rem_bytes>ISAP_rH_SZ){ \
+            x0 ^= U64BIG(src64[idx64]); \
+            idx64++; \
+            P12; \
+            rem_bytes -= ISAP_rH_SZ; \
+        } else if(rem_bytes==ISAP_rH_SZ){ \
+            x0 ^= U64BIG(src64[idx64]); \
+            P12; \
+            x0 ^= 0x8000000000000000ULL; \
+            break; \
+        } else { \
+            u64 lane64; \
+            u8 *lane8 = (u8 *)&lane64; \
+            u32 idx8 = idx64*8; \
+            for (u32 i = 0; i < 8; i++) { \
+                if(i<(rem_bytes)){ \
+                    lane8[i] = src[idx8]; \
+                    idx8++; \
+                } else if(i==rem_bytes){ \
+                    lane8[i] = 0x80; \
+                } else { \
+                    lane8[i] = 0x00; \
+                } \
+            } \
+            x0 ^= U64BIG(lane64); \
+            break; \
+        } \
+    } \
+})
+
+/******************************************************************************/
+/*                                   IsapRk                                   */
+/******************************************************************************/
+
+void isap_rk(
+	const u8 *k,
+	const u8 *iv,
+	const u8 *y,
+	const u64 ylen,
+	u8 *out,
+	const u64 outlen
+){
+    const u64 *k64 = (u64 *)k;
+    const u64 *iv64 = (u64 *)iv;
+    u64 *out64 = (u64 *)out;
+    u64 x0, x1, x2, x3, x4;
+    u64 t0, t1, t2, t3, t4;
+
+    // Init state
+    t0 = t1 = t2 = t3 = t4 = 0;
+    x0 = U64BIG(k64[0]);
+    x1 = U64BIG(k64[1]);
+    x2 = U64BIG(iv64[0]);
+    x3 = x4 = 0;
+    P12;
+
+    // Absorb Y
+    for (size_t i = 0; i < ylen*8-1; i++){
+        size_t cur_byte_pos = i/8;
+        size_t cur_bit_pos = 7-(i%8);
+        u8 cur_bit = ((y[cur_byte_pos] >> (cur_bit_pos)) & 0x01) << 7;
+        x0 ^= ((u64)cur_bit) << 56;
+        P1;
+    }
+    u8 cur_bit = ((y[ylen-1]) & 0x01) << 7;
+    x0 ^= ((u64)cur_bit) << 56;
+    P12;
+
+    // Extract K*
+    out64[0] = U64BIG(x0);
+    out64[1] = U64BIG(x1);
+    if(outlen == 24){
+        out64[2] = U64BIG(x2);
+    }
+}
+
+/******************************************************************************/
+/*                                  IsapMac                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const u8 *k,
+    const u8 *npub,
+    const u8 *ad, const u64 adlen,
+    const u8 *c, const u64 clen,
+    u8 *tag
+){
+    u8 state[ISAP_STATE_SZ];
+    const u64 *npub64 = (u64 *)npub;
+    u64 *state64 = (u64 *)state;
+    u64 x0, x1, x2, x3, x4;
+    u64 t0, t1, t2, t3, t4;
+    t0 = t1 = t2 = t3 = t4 = 0;
+
+    // Init state
+    x0 = U64BIG(npub64[0]);
+    x1 = U64BIG(npub64[1]);
+    x2 = U64BIG(((u64 *)ISAP_IV1)[0]);
+    x3 = x4 = 0;
+    P12;
+
+    // Absorb AD
+    ABSORB_LANES(ad,adlen);
+
+    // Domain seperation
+    P12;
+    x4 ^= 0x0000000000000001ULL;
+
+    // Absorb C
+    ABSORB_LANES(c,clen);
+    P12;
+
+    // Derive K*
+    state64[0] = U64BIG(x0);
+    state64[1] = U64BIG(x1);
+    state64[2] = U64BIG(x2);
+    state64[3] = U64BIG(x3);
+    state64[4] = U64BIG(x4);
+    isap_rk(k,ISAP_IV2,(u8 *)state64,CRYPTO_KEYBYTES,(u8 *)state64,CRYPTO_KEYBYTES);
+    x0 = U64BIG(state64[0]);
+    x1 = U64BIG(state64[1]);
+    x2 = U64BIG(state64[2]);
+    x3 = U64BIG(state64[3]);
+    x4 = U64BIG(state64[4]);
+
+    // Squeeze tag
+    P12;
+    unsigned long long *tag64 = (u64 *)tag;
+    tag64[0] = U64BIG(x0);
+    tag64[1] = U64BIG(x1);
+}
+
+/******************************************************************************/
+/*                                  IsapEnc                                   */
+/******************************************************************************/
+
+void isap_enc(
+	const u8 *k,
+	const u8 *npub,
+	const u8 *m,
+    const u64 mlen,
+	u8 *c
+){
+    u8 state[ISAP_STATE_SZ];
+
+    // Init state
+    u64 *state64 = (u64 *)state;
+    u64 *npub64 = (u64 *)npub;
+    isap_rk(k,ISAP_IV3,npub,CRYPTO_NPUBBYTES,state,ISAP_STATE_SZ-CRYPTO_NPUBBYTES);
+    u64 x0, x1, x2, x3, x4;
+    u64 t0, t1, t2, t3, t4;
+    t0 = t1 = t2 = t3 = t4 = 0;
+    x0 = U64BIG(state64[0]);
+    x1 = U64BIG(state64[1]);
+    x2 = U64BIG(state64[2]);
+    x3 = U64BIG(npub64[0]);
+    x4 = U64BIG(npub64[1]);
+    P6;
+
+    // Squeeze key stream
+    u64 rem_bytes = mlen;
+    u64 *m64 = (u64 *)m;
+    u64 *c64 = (u64 *)c;
+    u32 idx64 = 0;
+    while(1){
+        if(rem_bytes>ISAP_rH_SZ){
+            // Squeeze full lane
+            c64[idx64] = U64BIG(x0) ^ m64[idx64];
+            idx64++;
+            P6;
+            rem_bytes -= ISAP_rH_SZ;
+        } else if(rem_bytes==ISAP_rH_SZ){
+            // Squeeze full lane and stop
+            c64[idx64] = U64BIG(x0) ^ m64[idx64];
+            break;
+        } else {
+            // Squeeze partial lane and stop
+            u64 lane64 = U64BIG(x0);
+            u8 *lane8 = (u8 *)&lane64;
+            u32 idx8 = idx64*8;
+            for (u32 i = 0; i < rem_bytes; i++) {
+                c[idx8] = lane8[i] ^ m[idx8];
+                idx8++;
+            }
+            break;
+        }
+    }
+}
+
+
+/******************************************************************************/
+/*                             IsapMac and Enc                                */
+/******************************************************************************/
+
+void isap_mac_enc(
+    const u8 *k,
+    const u8 *npub,
+    const u8 *ad, const u64 adlen,
+    u8 *c, const u64 clen,
+    const u8 *m, const u64 mlen,
+    u8 *tag
+){
+    u8 state_mac[ISAP_STATE_SZ];
+    const u64 *npub64 = (u64 *)npub;
+    u64 *state_mac64 = (u64 *)state_mac;
+    u64 x0, x1, x2, x3, x4;
+    u64 t0, t1, t2, t3, t4;
+    __m128i x0a, x1a, x2a, x3a, x4a;
+    __m128i t0a, t1a, t2a, t3a, t4a;
+    t0 = t1 = t2 = t3 = t4 = 0;
+    
+    u8 state_enc[ISAP_STATE_SZ];
+
+    // Init state_enc
+    u64 *state_enc64 = (u64 *)state_enc;
+    isap_rk(k,ISAP_IV3,npub,CRYPTO_NPUBBYTES,state_enc,ISAP_STATE_SZ-CRYPTO_NPUBBYTES);
+    t0 = t1 = t2 = t3 = t4 = 0;
+     
+    state_enc64[3] = npub64[0];
+    state_enc64[4] = npub64[1];
+    
+    // Init state_mac
+    x0 = U64BIG(npub64[0]);
+    x1 = U64BIG(npub64[1]);
+    x2 = U64BIG(((u64 *)ISAP_IV1)[0]);
+    x3 = x4 = 0;
+    P12;
+
+    // Absorb AD
+    ABSORB_LANES(ad,adlen);
+    
+        
+   //Initialize AVX registers
+   t0 = U64BIG(state_enc64[0]);
+   t1 = U64BIG(state_enc64[1]);
+   t2 = U64BIG(state_enc64[2]);
+   t3 = U64BIG(state_enc64[3]);
+   t4 = U64BIG(state_enc64[4]);
+        
+        
+   u64 tmp[2];
+   tmp[1] = x0;
+   tmp[0] = t0;
+   x0a = _mm_maskz_loadu_epi64 (3, tmp);
+   tmp[1] = x1;
+   tmp[0] = t1;
+   x1a = _mm_maskz_loadu_epi64 (3, tmp);
+   tmp[1] = x2;
+   tmp[0] = t2;
+   x2a = _mm_maskz_loadu_epi64 (3, tmp);
+   tmp[1] = x3;
+   tmp[0] = t3;
+   x3a = _mm_maskz_loadu_epi64 (3, tmp);
+   tmp[1] = x4;
+   tmp[0] = t4;
+   x4a = _mm_maskz_loadu_epi64 (3, tmp);
+    
+
+
+    // Squeeze key stream while absorbing ciphertext
+    long long rem_enc_bytes = mlen;
+    u64 tmpc1,tmpc2;
+    u64 tmpm1,tmpm2;
+    u64 encbytes1,encbytes2;
+    u32 idx8_enc = 0;
+    u32 idx8_mac = 0; 
+    u64 tmpc_mac[2];
+    __m128i domain_separation = _mm_set_epi64x (0x0000000000000001ULL, 0);
+    long long rem_mac_bytes = clen; 
+    do{
+        //prepare plaintext to encrypt
+        tmpm1 = 0;
+        tmpm2 = 0;
+        if(rem_enc_bytes>=ISAP_rH_SZ)
+          encbytes1 = 8;
+        else
+          encbytes1 = rem_enc_bytes;
+        if((rem_enc_bytes-encbytes1)>=ISAP_rH_SZ)
+          encbytes2 = 8;
+        else
+          if(encbytes1 < 8)
+            encbytes2 = 0;
+          else
+            encbytes2 = rem_enc_bytes - encbytes1;
+        for (u32 i = 0; i < encbytes1; i++) 
+          tmpm1 = (tmpm1 << 8) | ((u64)m[idx8_enc+(encbytes1-i-1)]);
+        for (u32 i = 0; i < encbytes2; i++) 
+          tmpm2 = (tmpm2 << 8) | ((u64)m[idx8_enc+encbytes1+(encbytes2-i-1)]);
+          
+        //prepare ciphertext to authenticate
+        tmpc_mac[1] = 0; 
+        if(rem_enc_bytes < mlen){
+          u8 *lane8 = (u8 *)&tmpc_mac[1];  
+          for (u32 i = 0; i < 8; i++) { 
+            if(i<(rem_mac_bytes)){ 
+                lane8[i] = c[idx8_mac]; 
+                idx8_mac++; 
+            } else if(i==rem_mac_bytes){ 
+                lane8[i] = 0x80; 
+            } else { 
+                lane8[i] = 0x00; 
+            } 
+          }
+          tmpc_mac[1] = U64BIG(tmpc_mac[1]);
+          rem_mac_bytes -= ISAP_rH_SZ;
+        }
+        
+        
+        
+        x0a = _mm_xor_si128 (x0a, _mm_maskz_loadu_epi64 (2, tmpc_mac));
+        P6_avx_first;
+        _mm_mask_storeu_epi64 (tmp, 1, x0a);
+        tmpc1 = U64BIG(tmp[0]) ^ tmpm1;
+        P6_avx_second;
+        _mm_mask_storeu_epi64 (tmp, 1, x0a);
+        tmpc2 = U64BIG(tmp[0]) ^ tmpm2;
+        x4a = _mm_xor_si128 (x4a, domain_separation);
+        domain_separation = _mm_andnot_si128 (domain_separation,domain_separation);
+       
+        
+
+        // Squeeze  lane 
+        u8 *lane8 = (u8 *)&tmpc1;
+        for (u32 i = 0; i < encbytes1; i++) {
+            c[idx8_enc] = lane8[i];
+            idx8_enc++;
+        }
+        lane8 = (u8 *)&tmpc2;
+        for (u32 i = 0; i < encbytes2; i++) {
+            c[idx8_enc] = lane8[i];
+            idx8_enc++;
+        }
+        rem_enc_bytes -= 2*ISAP_rH_SZ;
+        
+    }while(rem_enc_bytes>0);
+    //end encrypting
+    
+    
+    //Restore MAC state
+    _mm_mask_storeu_epi64 (tmp, 2, x0a);
+    x0 = tmp[1];
+    _mm_mask_storeu_epi64 (tmp, 2, x1a);
+    x1 = tmp[1];
+    _mm_mask_storeu_epi64 (tmp, 2, x2a);
+    x2 = tmp[1];
+    _mm_mask_storeu_epi64 (tmp, 2, x3a);
+    x3 = tmp[1];
+    _mm_mask_storeu_epi64 (tmp, 2, x4a);
+    x4 = tmp[1];
+  
+
+    // Absorb  rest of C
+    while(rem_mac_bytes>=0){ 
+        tmpc_mac[1] = 0; 
+        u8 *lane8 = (u8 *)&tmpc_mac[1];  
+        for (u32 i = 0; i < 8; i++) { 
+          if(i<(rem_mac_bytes)){ 
+              lane8[i] = c[idx8_mac]; 
+              idx8_mac++; 
+          } else if(i==rem_mac_bytes){ 
+              lane8[i] = 0x80; 
+          } else { 
+              lane8[i] = 0x00; 
+          } 
+        } 
+        x0 ^= U64BIG(tmpc_mac[1]);
+        P12;
+        rem_mac_bytes -= ISAP_rH_SZ;
+    } 
+
+
+    // Derive K*
+    state_mac64[0] = U64BIG(x0);
+    state_mac64[1] = U64BIG(x1);
+    state_mac64[2] = U64BIG(x2);
+    state_mac64[3] = U64BIG(x3);
+    state_mac64[4] = U64BIG(x4);
+    isap_rk(k,ISAP_IV2,(u8 *)state_mac64,CRYPTO_KEYBYTES,(u8 *)state_mac64,CRYPTO_KEYBYTES);
+    x0 = U64BIG(state_mac64[0]);
+    x1 = U64BIG(state_mac64[1]);
+    x2 = U64BIG(state_mac64[2]);
+    x3 = U64BIG(state_mac64[3]);
+    x4 = U64BIG(state_mac64[4]);
+
+    // Squeeze tag
+    P12;
+    unsigned long long *tag64 = (u64 *)tag;
+    tag64[0] = U64BIG(x0);
+    tag64[1] = U64BIG(x1);
+}

isap/Implementations/crypto_aead/isapa128av20/avx_512/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH+7)/8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const unsigned char *k,
+	const unsigned char *npub,
+	const unsigned char *ad, const unsigned long long adlen,
+	const unsigned char *c, const unsigned long long clen,
+	unsigned char *tag
+);
+
+void isap_mac_enc(
+    const unsigned char *k,
+    const unsigned char *npub,
+    const unsigned char *ad, const unsigned long long adlen,
+    unsigned char *c, const unsigned long long clen,
+    const unsigned char *m, const unsigned long long mlen,
+    unsigned char *tag
+);
+
+void isap_rk(
+	const unsigned char *k,
+	const unsigned char *iv,
+	const unsigned char *in,
+	const unsigned long long inlen,
+	unsigned char *out,
+	const unsigned long long outlen
+);
+
+void isap_enc(
+	const unsigned char *k,
+	const unsigned char *npub,
+	const unsigned char *m, const unsigned long long mlen,
+	unsigned char *c
+);
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32/api.h

+#ifndef API_H
+#define API_H
+
+// isapa128a
+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+
+// asconhashv12
+#define CRYPTO_BYTES 32
+#define ASCON_HASH_OUTLEN 32
+#define ASCON_HASH_ROUNDS 12
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+forceinline lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint32_t ROR32(uint32_t x, int n)
+{
+    return x >> n | x << (-n & 31);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint64_t ROR(uint64_t x, int n)
+{
+    lane_t b, a = {.x = x};
+    b.w[0] = (n % 2) ? ROR32(a.w[1], (n - 1) / 2) : ROR32(a.w[0], n / 2);
+    b.w[1] = (n % 2) ? ROR32(a.w[0], (n + 1) / 2) : ROR32(a.w[1], n / 2);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    state_t t;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    t.x[0] = s->x[0] ^ (~s->x[1] & s->x[2]);
+    t.x[2] = s->x[2] ^ (~s->x[3] & s->x[4]);
+    t.x[4] = s->x[4] ^ (~s->x[0] & s->x[1]);
+    t.x[1] = s->x[1] ^ (~s->x[2] & s->x[3]);
+    t.x[3] = s->x[3] ^ (~s->x[4] & s->x[0]);
+    t.x[1] ^= t.x[0];
+    t.x[3] ^= t.x[2];
+    t.x[0] ^= t.x[4];
+    /* linear layer */
+    s->x[2] = t.x[2] ^ ROR(t.x[2], 6 - 1);
+    s->x[3] = t.x[3] ^ ROR(t.x[3], 17 - 10);
+    s->x[4] = t.x[4] ^ ROR(t.x[4], 41 - 7);
+    s->x[0] = t.x[0] ^ ROR(t.x[0], 28 - 19);
+    s->x[1] = t.x[1] ^ ROR(t.x[1], 61 - 39);
+    s->x[2] = t.x[2] ^ ROR(s->x[2], 1);
+    s->x[3] = t.x[3] ^ ROR(s->x[3], 10);
+    s->x[4] = t.x[4] ^ ROR(s->x[4], 7);
+    s->x[0] = t.x[0] ^ ROR(s->x[0], 19);
+    s->x[1] = t.x[1] ^ ROR(s->x[1], 39);
+    s->x[2] = ~s->x[2];
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P12ROUNDS(state_t *s)
+{
+    ROUND(s, 0xc0000000c);
+    ROUND(s, 0xc00000009);
+    ROUND(s, 0x90000000c);
+    ROUND(s, 0x900000009);
+    ROUND(s, 0xc00000006);
+    ROUND(s, 0xc00000003);
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_32/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen+ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0) {
+		isap_enc(k,npub,m,mlen,c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c+mlen;
+	isap_mac(k,npub,ad,adlen,c,mlen,tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen-ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char tag[ISAP_TAG_SZ];
+	isap_mac(k,npub,ad,adlen,c,*mlen,tag);
+
+	// Compare tag
+	unsigned long eq_cnt = 0;
+	for(unsigned int i = 0; i < ISAP_TAG_SZ; i++) {
+		eq_cnt += (tag[i] == c[(*mlen)+i]);
+	}
+
+	// Perform decryption if tag is correct
+	if(eq_cnt == (unsigned long)ISAP_TAG_SZ){
+		if (*mlen > 0) {
+			isap_enc(k,npub,c,*mlen,m);
+		}
+		return 0;
+	} else {
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/bi_32/forceinline.h

+#ifndef FORCEINLINE_H_
+#define FORCEINLINE_H_
+
+/* define forceinline macro */
+#ifdef _MSC_VER
+#define forceinline __forceinline
+#elif defined(__GNUC__)
+#define forceinline inline __attribute__((__always_inline__))
+#elif defined(__CLANG__)
+#if __has_attribute(__always_inline__)
+#define forceinline inline __attribute__((__always_inline__))
+#else
+#define forceinline inline
+#endif
+#else
+#define forceinline inline
+#endif
+
+#endif /* FORCEINLINE_H_ */

isap/Implementations/crypto_aead/isapa128av20/bi_32/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+forceinline lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    uint32_t tmp0, tmp1;
+    __asm__ __volatile__(
+        "eor %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "mvn %[tmp0], %[x0_e]\n\t"
+        "orr %[tmp0], %[x4_e], %[tmp0]\n\t"
+        "eor %[x2_e], %[x2_e], %[C_e]\n\t"
+        "bic %[tmp1], %[x2_e], %[x1_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "mvn %[tmp1], %[x4_e]\n\t"
+        "orr %[tmp1], %[x3_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "bic %[tmp1], %[x1_e], %[x0_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[tmp1]\n\t"
+        "and %[tmp1], %[x3_e], %[x2_e]\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp0]\n\t"
+        "eor %[x1_e], %[x1_e], %[x0_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[x2_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "eor %[x0_o], %[x0_o], %[x4_o]\n\t"
+        "eor %[x4_o], %[x4_o], %[x3_o]\n\t"
+        "eor %[x2_o], %[x2_o], %[C_o]\n\t"
+        "eor %[x2_o], %[x2_o], %[x1_o]\n\t"
+        "mvn %[tmp0], %[x0_o]\n\t"
+        "orr %[tmp0], %[x4_o], %[tmp0]\n\t"
+        "bic %[tmp1], %[x2_o], %[x1_o]\n\t"
+        "eor %[x0_o], %[x0_o], %[tmp1]\n\t"
+        "mvn %[tmp1], %[x4_o]\n\t"
+        "orr %[tmp1], %[x3_o], %[tmp1]\n\t"
+        "eor %[x2_o], %[x2_o], %[tmp1]\n\t"
+        "bic %[tmp1], %[x1_o], %[x0_o]\n\t"
+        "eor %[x4_o], %[x4_o], %[tmp1]\n\t"
+        "and %[tmp1], %[x3_o], %[x2_o]\n\t"
+        "eor %[x1_o], %[x1_o], %[tmp1]\n\t"
+        "eor %[x3_o], %[x3_o], %[tmp0]\n\t"
+        "eor %[x1_o], %[x1_o], %[x0_o]\n\t"
+        "eor %[x3_o], %[x3_o], %[x2_o]\n\t"
+        "eor %[x0_o], %[x0_o], %[x4_o]\n\t"
+        "eor %[tmp0], %[x0_e], %[x0_o], ror #4\n\t"
+        "eor %[tmp1], %[x0_o], %[x0_e], ror #5\n\t"
+        "eor %[x0_o], %[x0_o], %[tmp0], ror #10\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp1], ror #9\n\t"
+        "eor %[tmp0], %[x1_e], %[x1_e], ror #11\n\t"
+        "eor %[tmp1], %[x1_o], %[x1_o], ror #11\n\t"
+        "eor %[x1_o], %[x1_o], %[tmp0], ror #20\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp1], ror #19\n\t"
+        "eor %[tmp0], %[x2_e], %[x2_o], ror #2\n\t"
+        "eor %[tmp1], %[x2_o], %[x2_e], ror #3\n\t"
+        "eor %[x2_o], %[x2_o], %[tmp0], ror #1\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[x3_e], %[x3_o], ror #3\n\t"
+        "eor %[tmp1], %[x3_o], %[x3_e], ror #4\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp0], ror #5\n\t"
+        "eor %[x3_o], %[x3_o], %[tmp1], ror #5\n\t"
+        "eor %[tmp0], %[x4_e], %[x4_e], ror #17\n\t"
+        "eor %[tmp1], %[x4_o], %[x4_o], ror #17\n\t"
+        "eor %[x4_o], %[x4_o], %[tmp0], ror #4\n\t"
+        "eor %[x4_e], %[x4_e], %[tmp1], ror #3\n\t"
+        : [x0_e] "+r"(s->w[0][0]), [x0_o] "+r"(s->w[0][1]),
+          [x1_e] "+r"(s->w[1][0]), [x1_o] "+r"(s->w[1][1]),
+          [x2_e] "+r"(s->w[2][0]), [x2_o] "+r"(s->w[2][1]),
+          [x3_e] "+r"(s->w[3][0]), [x3_o] "+r"(s->w[3][1]),
+          [x4_e] "+r"(s->w[4][0]), [x4_o] "+r"(s->w[4][1]), [tmp0] "=r"(tmp0),
+          [tmp1] "=r"(tmp1)
+        : [C_e] "i"((uint32_t)C), [C_o] "i"((uint32_t)(C >> 32))
+        :);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P12ROUNDS(state_t *s)
+{
+    ROUND(s, 0xc0000000c);
+    ROUND(s, 0xc00000009);
+    ROUND(s, 0x90000000c);
+    ROUND(s, 0x900000009);
+    ROUND(s, 0xc00000006);
+    ROUND(s, 0xc00000003);
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/crypto_aead.c

+../bi_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/isap.c

+../bi_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6/isap.h

+../bi_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+forceinline lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    uint32_t tmp0, tmp1, tmp2;
+    __asm__ __volatile__(
+        "@.syntax_unified\n\t"
+        "movs %[tmp1], %[C_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "movs %[tmp0], %[x0_e]\n\t"
+        "bic %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[tmp1], %[x2_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "movs %[tmp1], %[x4_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[tmp2], %[x1_e]\n\t"
+        "bic %[tmp2], %[tmp2], %[x0_e]\n\t"
+        "eor %[tmp2], %[x4_e], %[tmp2]\n\t"
+        "movs %[tmp1], %[x3_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "eor %[tmp1], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[x3_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp2]\n\t"
+        "movs %[x4_e], %[x4_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x3_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[tmp0]\n\t"
+        "movs %[x1_o], %[tmp1]\n\t"
+        "movs %[tmp0], %[x0_o]\n\t"
+        "movs %[tmp1], %[x2_o]\n\t"
+        "movs %[x0_o], %[x0_e]\n\t"
+        "movs %[x2_o], %[x2_e]\n\t"
+        "movs %[x0_e], %[C_o]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "movs %[x0_e], %[tmp0] \n\t"
+        "bic %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "movs %[x2_e], %[tmp1] \n\t"
+        "bic %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[x2_e], %[x4_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "bic %[x2_e], %[x2_e], %[tmp0]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x3_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x2_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[x0_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[x4_o], %[tmp1]\n\t"
+        "movs %[x2_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x1_e]\n\t"
+        "movs %[tmp1], #17\n\t"
+        "movs %[x0_e], %[tmp2]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[tmp2], %[x0_e]\n\t"
+        "movs %[x1_e], %[x4_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x4_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp2], %[tmp2], %[x1_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x0_e]\n\t"
+        "movs %[x1_e], %[x2_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "movs %[x0_e], %[x3_e]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x2_e], %[x0_e]\n\t"
+        "movs %[tmp1], #5\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[x0_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[x0_e], %[x0_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x2_e]\n\t"
+        "movs %[x0_o], %[tmp2]\n\t"
+        "movs %[tmp2], %[x4_o]\n\t"
+        "movs %[x4_o], %[x4_e]\n\t"
+        "movs %[x4_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x3_e]\n\t"
+        "movs %[x3_e], %[x0_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[tmp0], %[x3_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "movs %[x2_e], %[tmp0]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x0_e], %[x2_e]\n\t"
+        "movs %[tmp1], #9\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x3_e]\n\t"
+        "movs %[tmp1], #10\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[tmp1], #11\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x1_e], %[x2_e]\n\t"
+        "movs %[x3_e], %[x4_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x4_e], %[x3_e]\n\t"
+        "movs %[tmp1], #19\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x3_e]\n\t"
+        "movs %[tmp1], #20\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x2_o]\n\t"
+        "movs %[x3_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x4_e]\n\t"
+        "movs %[x2_o], %[tmp0]\n\t"
+        "movs %[x4_e], #2\n\t"
+        "mvn %[tmp0], %[tmp2]\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp0], %[x2_e], %[tmp0]\n\t"
+        "movs %[x4_e], #3\n\t"
+        "mvn %[tmp1], %[x2_e]\n\t"
+        "ror %[tmp1], %[tmp1], %[x4_e]\n\t"
+        "eor %[tmp1], %[tmp2], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[x4_e], #1\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp2], %[tmp2], %[tmp0]\n\t"
+        "movs %[x4_e], %[x0_o]\n\t"
+        "movs %[x0_o], %[x2_o]\n\t"
+        "movs %[x2_o], %[tmp2]\n\t"
+        : [x0_e] "+l"(s->w[0][0]), [x1_e] "+l"(s->w[1][0]),
+          [x2_e] "+l"(s->w[2][0]), [x3_e] "+l"(s->w[3][0]),
+          [x4_e] "+l"(s->w[4][0]), [x0_o] "+r"(s->w[0][1]),
+          [x1_o] "+r"(s->w[1][1]), [x2_o] "+r"(s->w[2][1]),
+          [x3_o] "+r"(s->w[3][1]), [x4_o] "+r"(s->w[4][1]),
+          [tmp0] "=l"(tmp0), [tmp1] "=l"(tmp1), [tmp2] "=l"(tmp2)
+        : [C_e] "ri"((uint32_t)C), [C_o] "ri"((uint32_t)(C >> 32))
+        :);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P12ROUNDS(state_t *s)
+{
+    ROUND(s, 0xc0000000c);
+    ROUND(s, 0xc00000009);
+    ROUND(s, 0x90000000c);
+    ROUND(s, 0x900000009);
+    ROUND(s, 0xc00000006);
+    ROUND(s, 0xc00000003);
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/crypto_aead.c

+../bi_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/isap.c

+../bi_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m/isap.h

+../bi_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    uint32_t tmp0, tmp1, tmp2;
+    __asm__ __volatile__(
+        "@.syntax_unified\n\t"
+        "movs %[tmp1], %[C_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "movs %[tmp0], %[x0_e]\n\t"
+        "bic %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[tmp1], %[x2_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "movs %[tmp1], %[x4_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[tmp2], %[x1_e]\n\t"
+        "bic %[tmp2], %[tmp2], %[x0_e]\n\t"
+        "eor %[tmp2], %[x4_e], %[tmp2]\n\t"
+        "movs %[tmp1], %[x3_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "eor %[tmp1], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[x3_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp2]\n\t"
+        "movs %[x4_e], %[x4_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x3_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[tmp0]\n\t"
+        "movs %[x1_o], %[tmp1]\n\t"
+        "movs %[tmp0], %[x0_o]\n\t"
+        "movs %[tmp1], %[x2_o]\n\t"
+        "movs %[x0_o], %[x0_e]\n\t"
+        "movs %[x2_o], %[x2_e]\n\t"
+        "movs %[x0_e], %[C_o]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "movs %[x0_e], %[tmp0] \n\t"
+        "bic %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "movs %[x2_e], %[tmp1] \n\t"
+        "bic %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[x2_e], %[x4_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "bic %[x2_e], %[x2_e], %[tmp0]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x3_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x2_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[x0_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[x4_o], %[tmp1]\n\t"
+        "movs %[x2_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x1_e]\n\t"
+        "movs %[tmp1], #17\n\t"
+        "movs %[x0_e], %[tmp2]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[tmp2], %[x0_e]\n\t"
+        "movs %[x1_e], %[x4_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x4_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp2], %[tmp2], %[x1_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x0_e]\n\t"
+        "movs %[x1_e], %[x2_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "movs %[x0_e], %[x3_e]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x2_e], %[x0_e]\n\t"
+        "movs %[tmp1], #5\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[x0_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[x0_e], %[x0_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x2_e]\n\t"
+        "movs %[x0_o], %[tmp2]\n\t"
+        "movs %[tmp2], %[x4_o]\n\t"
+        "movs %[x4_o], %[x4_e]\n\t"
+        "movs %[x4_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x3_e]\n\t"
+        "movs %[x3_e], %[x0_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[tmp0], %[x3_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "movs %[x2_e], %[tmp0]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x0_e], %[x2_e]\n\t"
+        "movs %[tmp1], #9\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x3_e]\n\t"
+        "movs %[tmp1], #10\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[tmp1], #11\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x1_e], %[x2_e]\n\t"
+        "movs %[x3_e], %[x4_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x4_e], %[x3_e]\n\t"
+        "movs %[tmp1], #19\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x3_e]\n\t"
+        "movs %[tmp1], #20\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x2_o]\n\t"
+        "movs %[x3_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x4_e]\n\t"
+        "movs %[x2_o], %[tmp0]\n\t"
+        "movs %[x4_e], #2\n\t"
+        "mvn %[tmp0], %[tmp2]\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp0], %[x2_e], %[tmp0]\n\t"
+        "movs %[x4_e], #3\n\t"
+        "mvn %[tmp1], %[x2_e]\n\t"
+        "ror %[tmp1], %[tmp1], %[x4_e]\n\t"
+        "eor %[tmp1], %[tmp2], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[x4_e], #1\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp2], %[tmp2], %[tmp0]\n\t"
+        "movs %[x4_e], %[x0_o]\n\t"
+        "movs %[x0_o], %[x2_o]\n\t"
+        "movs %[x2_o], %[tmp2]\n\t"
+        : [x0_e] "+l"(s->w[0][0]), [x1_e] "+l"(s->w[1][0]),
+          [x2_e] "+l"(s->w[2][0]), [x3_e] "+l"(s->w[3][0]),
+          [x4_e] "+l"(s->w[4][0]), [x0_o] "+r"(s->w[0][1]),
+          [x1_o] "+r"(s->w[1][1]), [x2_o] "+r"(s->w[2][1]),
+          [x3_o] "+r"(s->w[3][1]), [x4_o] "+r"(s->w[4][1]),
+          [tmp0] "=l"(tmp0), [tmp1] "=l"(tmp1), [tmp2] "=l"(tmp2)
+        : [C_e] "ri"((uint32_t)C), [C_o] "ri"((uint32_t)(C >> 32))
+        :);
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xc0000000c);
+        ROUND(s, 0xc00000009);
+        ROUND(s, 0x90000000c);
+        ROUND(s, 0x900000009);
+        ROUND(s, 0xc00000006);
+        ROUND(s, 0xc00000003);
+    case 6:
+        ROUND(s, 0x900000006);
+        ROUND(s, 0x900000003);
+        ROUND(s, 0x60000000c);
+        ROUND(s, 0x600000009);
+        ROUND(s, 0x30000000c);
+    default:
+        ROUND(s, 0x300000009);
+        ;
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/crypto_aead.c

+../bi_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/isap.c

+../bi_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_compact/isap.h

+../bi_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+#define P_PVP PROUNDS(s, 7)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    uint32_t tmp0, tmp1, tmp2;
+    __asm__ __volatile__(
+        "@.syntax_unified\n\t"
+        "movs %[tmp1], %[C_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "movs %[tmp0], %[x0_e]\n\t"
+        "bic %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[tmp1], %[x2_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "movs %[tmp1], %[x4_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x3_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[tmp2], %[x1_e]\n\t"
+        "bic %[tmp2], %[tmp2], %[x0_e]\n\t"
+        "eor %[tmp2], %[x4_e], %[tmp2]\n\t"
+        "movs %[tmp1], %[x3_e]\n\t"
+        "bic %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "eor %[tmp1], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[x3_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp2]\n\t"
+        "movs %[x4_e], %[x4_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x3_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[tmp0]\n\t"
+        "movs %[x1_o], %[tmp1]\n\t"
+        "movs %[tmp0], %[x0_o]\n\t"
+        "movs %[tmp1], %[x2_o]\n\t"
+        "movs %[x0_o], %[x0_e]\n\t"
+        "movs %[x2_o], %[x2_e]\n\t"
+        "movs %[x0_e], %[C_o]\n\t"
+        "eor %[tmp1], %[tmp1], %[x0_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x1_e]\n\t"
+        "movs %[x0_e], %[tmp0] \n\t"
+        "bic %[x0_e], %[x0_e], %[x4_e]\n\t"
+        "movs %[x2_e], %[tmp1] \n\t"
+        "bic %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[x2_e], %[x4_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[x3_e]\n\t"
+        "eor %[tmp1], %[tmp1], %[x2_e]\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "bic %[x2_e], %[x2_e], %[tmp0]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x3_e] \n\t"
+        "bic %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x2_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[x0_e]\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp0]\n\t"
+        "eor %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "movs %[x4_o], %[tmp1]\n\t"
+        "movs %[x2_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x1_e]\n\t"
+        "movs %[tmp1], #17\n\t"
+        "movs %[x0_e], %[tmp2]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[tmp2], %[x0_e]\n\t"
+        "movs %[x1_e], %[x4_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x4_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[tmp2], %[tmp2], %[x1_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x0_e]\n\t"
+        "movs %[x1_e], %[x2_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[tmp1], #3\n\t"
+        "movs %[x0_e], %[x3_e]\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x2_e], %[x0_e]\n\t"
+        "movs %[tmp1], #5\n\t"
+        "ror %[x0_e], %[x0_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[x0_e]\n\t"
+        "ror %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x3_e], %[x1_e]\n\t"
+        "movs %[x0_e], %[x0_o]\n\t"
+        "movs %[x1_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x2_e]\n\t"
+        "movs %[x0_o], %[tmp2]\n\t"
+        "movs %[tmp2], %[x4_o]\n\t"
+        "movs %[x4_o], %[x4_e]\n\t"
+        "movs %[x4_e], %[x3_o]\n\t"
+        "movs %[x3_o], %[x3_e]\n\t"
+        "movs %[x3_e], %[x0_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[tmp0], %[x3_e]\n\t"
+        "movs %[tmp1], #4\n\t"
+        "movs %[x2_e], %[tmp0]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x0_e], %[x2_e]\n\t"
+        "movs %[tmp1], #9\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x0_e], %[x0_e], %[x3_e]\n\t"
+        "movs %[tmp1], #10\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[tmp0], %[x2_e]\n\t"
+        "movs %[tmp1], #11\n\t"
+        "movs %[x2_e], %[x1_e]\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x1_e], %[x2_e]\n\t"
+        "movs %[x3_e], %[x4_e]\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x3_e], %[x4_e], %[x3_e]\n\t"
+        "movs %[tmp1], #19\n\t"
+        "ror %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[x3_e]\n\t"
+        "movs %[tmp1], #20\n\t"
+        "ror %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "eor %[x4_e], %[x4_e], %[x2_e]\n\t"
+        "movs %[x2_e], %[x2_o]\n\t"
+        "movs %[x3_e], %[x1_o]\n\t"
+        "movs %[x1_o], %[x4_e]\n\t"
+        "movs %[x2_o], %[tmp0]\n\t"
+        "movs %[x4_e], #2\n\t"
+        "mvn %[tmp0], %[tmp2]\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp0], %[x2_e], %[tmp0]\n\t"
+        "movs %[x4_e], #3\n\t"
+        "mvn %[tmp1], %[x2_e]\n\t"
+        "ror %[tmp1], %[tmp1], %[x4_e]\n\t"
+        "eor %[tmp1], %[tmp2], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "movs %[x4_e], #1\n\t"
+        "ror %[tmp0], %[tmp0], %[x4_e]\n\t"
+        "eor %[tmp2], %[tmp2], %[tmp0]\n\t"
+        "movs %[x4_e], %[x0_o]\n\t"
+        "movs %[x0_o], %[x2_o]\n\t"
+        "movs %[x2_o], %[tmp2]\n\t"
+        : [x0_e] "+l"(s->w[0][0]), [x1_e] "+l"(s->w[1][0]),
+          [x2_e] "+l"(s->w[2][0]), [x3_e] "+l"(s->w[3][0]),
+          [x4_e] "+l"(s->w[4][0]), [x0_o] "+r"(s->w[0][1]),
+          [x1_o] "+r"(s->w[1][1]), [x2_o] "+r"(s->w[2][1]),
+          [x3_o] "+r"(s->w[3][1]), [x4_o] "+r"(s->w[4][1]),
+          [tmp0] "=l"(tmp0), [tmp1] "=l"(tmp1), [tmp2] "=l"(tmp2)
+        : [C_e] "ri"((uint32_t)C), [C_o] "ri"((uint32_t)(C >> 32))
+        :);
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xc0000000c);
+        ROUND(s, 0xc00000009);
+        ROUND(s, 0x90000000c);
+        ROUND(s, 0x900000009);
+        ROUND(s, 0xc00000006);
+    case 7:
+        ROUND(s, 0xc00000003);
+    case 6:
+        ROUND(s, 0x900000006);
+        ROUND(s, 0x900000003);
+        ROUND(s, 0x60000000c);
+        ROUND(s, 0x600000009);
+        ROUND(s, 0x30000000c);
+    default:
+        ROUND(s, 0x300000009);
+        ;
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen + ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0)
+	{
+		isap_enc(k, npub, m, mlen, c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c + mlen;
+	isap_mac(k, npub, ad, adlen, c, mlen, tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen - ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char T[16];
+	isap_mac(k, npub, ad, adlen, c, *mlen, T);
+
+	// Compare tag
+	unsigned char T_star[16];
+	for (int i = 0; i < 16; i++)
+    {
+        T_star[i] = *(c + *mlen + i);
+    }
+	int eq_cnt = pvp(T, T_star);
+
+	// Perform decryption if tag is correct
+	if (eq_cnt == ISAP_TAG_SZ)
+	{
+		if (*mlen > 0)
+		{
+			isap_enc(k, npub, c, *mlen, m);
+		}
+		return 0;
+	}
+	else
+	{
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+// Needed for LR tag comparison
+uint64_t s0, s1;
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Needed for LR tag comparison
+    s0 = s->x[0];
+    s1 = s->x[1];
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/* Leakage resilient tag comparison.                                          */
+/* Similar to Fig.3 of https://eprint.iacr.org/2021/402.pdf.                  */
+/******************************************************************************/
+
+int pvp(
+    const uint8_t *T, const uint8_t *T_star)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Calculate U
+    s->l[0] = U64TOWORD(*(lane_t *)(T + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+    uint64_t u0, u1;
+    u0 = s->x[0];
+    u1 = s->x[1];
+
+    // Calculate U'
+    s->l[0] = U64TOWORD(*(lane_t *)(T_star + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T_star + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+
+    // Compare tag
+    int eq_cnt = 0;
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[0][i] == ((uint8_t *)&u0)[i]);
+    }
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[1][i] == ((uint8_t *)&u1)[i]);
+    }
+    return eq_cnt;
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv6m_stp/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+int pvp(
+	const unsigned char *T,
+	const unsigned char *T_star);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
+
+#endif
+

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+forceinline lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+forceinline lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    // Based on the round description of Ascon given in the Bachelor's
+    // thesis: "Optimizing Ascon on RISC-V" of Lars Jellema
+    // see https://github.com/Lucus16/ascon-riscv/
+    uint32_t tmp0, tmp1, tmp2;
+    __asm__ __volatile__(
+        "eor %[x2_e], %[x2_e], %[C_e]\n\t"
+        "eor %[tmp0], %[x1_e], %[x2_e]\n\t"
+        "eor %[tmp1], %[x0_e], %[x4_e]\n\t"
+        "eor %[tmp2], %[x3_e], %[x4_e]\n\t"
+        "orn %[x4_e], %[x3_e], %[x4_e]\n\t"
+        "eor %[x4_e], %[x4_e], %[tmp0]\n\t"
+        "eor %[x3_e], %[x3_e], %[x1_e]\n\t"
+        "orr %[x3_e], %[x3_e], %[tmp0]\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp1]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1]\n\t"
+        "orr %[x2_e], %[x2_e], %[x1_e]\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp2]\n\t"
+        "bic %[x1_e], %[x1_e], %[tmp1]\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp2]\n\t"
+        "orr %[x0_e], %[x0_e], %[tmp2]\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp0]\n\t"
+        "eor %[x2_o], %[x2_o], %[C_o]\n\t"
+        "eor %[tmp0], %[x1_o], %[x2_o]\n\t"
+        "eor %[tmp1], %[x0_o], %[x4_o]\n\t"
+        "eor %[tmp2], %[x3_o], %[x4_o]\n\t"
+        "orn %[x4_o], %[x3_o], %[x4_o]\n\t"
+        "eor %[x4_o], %[x4_o], %[tmp0]\n\t"
+        "eor %[x3_o], %[x3_o], %[x1_o]\n\t"
+        "orr %[x3_o], %[x3_o], %[tmp0]\n\t"
+        "eor %[x3_o], %[x3_o], %[tmp1]\n\t"
+        "eor %[x2_o], %[x2_o], %[tmp1]\n\t"
+        "orr %[x2_o], %[x2_o], %[x1_o]\n\t"
+        "eor %[x2_o], %[x2_o], %[tmp2]\n\t"
+        "bic %[x1_o], %[x1_o], %[tmp1]\n\t"
+        "eor %[x1_o], %[x1_o], %[tmp2]\n\t"
+        "orr %[x0_o], %[x0_o], %[tmp2]\n\t"
+        "eor %[x0_o], %[x0_o], %[tmp0]\n\t"
+        "eor %[tmp0], %[x2_e], %[x2_o], ror #4\n\t"
+        "eor %[tmp1], %[x2_o], %[x2_e], ror #5\n\t"
+        "eor %[x2_o], %[x2_o], %[tmp0], ror #10\n\t"
+        "eor %[x2_e], %[x2_e], %[tmp1], ror #9\n\t"
+        "eor %[tmp0], %[x3_e], %[x3_e], ror #11\n\t"
+        "eor %[tmp1], %[x3_o], %[x3_o], ror #11\n\t"
+        "eor %[x3_o], %[x3_o], %[tmp0], ror #20\n\t"
+        "eor %[x3_e], %[x3_e], %[tmp1], ror #19\n\t"
+        "eor %[tmp0], %[x4_e], %[x4_o], ror #2\n\t"
+        "eor %[tmp1], %[x4_o], %[x4_e], ror #3\n\t"
+        "eor %[x4_o], %[x4_o], %[tmp0], ror #1\n\t"
+        "eor %[x4_e], %[x4_e], %[tmp1]\n\t"
+        "eor %[tmp0], %[x0_e], %[x0_o], ror #3\n\t"
+        "eor %[tmp1], %[x0_o], %[x0_e], ror #4\n\t"
+        "eor %[x0_e], %[x0_e], %[tmp0], ror #5\n\t"
+        "eor %[x0_o], %[x0_o], %[tmp1], ror #5\n\t"
+        "eor %[tmp0], %[x1_e], %[x1_e], ror #17\n\t"
+        "eor %[tmp1], %[x1_o], %[x1_o], ror #17\n\t"
+        "eor %[x1_o], %[x1_o], %[tmp0], ror #4\n\t"
+        "eor %[x1_e], %[x1_e], %[tmp1], ror #3\n\t"
+        : [x0_e] "+r"(s->w[0][0]), [x0_o] "+r"(s->w[0][1]),
+          [x1_e] "+r"(s->w[1][0]), [x1_o] "+r"(s->w[1][1]),
+          [x2_e] "+r"(s->w[2][0]), [x2_o] "+r"(s->w[2][1]),
+          [x3_e] "+r"(s->w[3][0]), [x3_o] "+r"(s->w[3][1]),
+          [x4_e] "+r"(s->w[4][0]), [x4_o] "+r"(s->w[4][1]), [tmp0] "=r"(tmp0),
+          [tmp1] "=r"(tmp1), [tmp2] "=r"(tmp2)
+        : [C_e] "i"((uint32_t)C), [C_o] "i"((uint32_t)(C >> 32))
+        :);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P12ROUNDS(state_t *s)
+{
+    ROUND(s, 0xc0000000c);
+    ROUND(s, 0xc00000009);
+    ROUND(s, 0x90000000c);
+    ROUND(s, 0x900000009);
+    ROUND(s, 0xc00000006);
+    ROUND(s, 0xc00000003);
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x900000006);
+    ROUND(s, 0x900000003);
+    ROUND(s, 0x60000000c);
+    ROUND(s, 0x600000009);
+    ROUND(s, 0x30000000c);
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x300000009);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/crypto_aead.c

+../bi_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/isap.c

+../bi_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_armv7m/isap.h

+../bi_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint32_t ROR32(uint32_t x, int n)
+{
+    return x >> n | x << (-n & 31);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint64_t ROR(uint64_t x, int n)
+{
+    lane_t b, a = {.x = x};
+    b.w[0] = (n % 2) ? ROR32(a.w[1], (n - 1) / 2) : ROR32(a.w[0], n / 2);
+    b.w[1] = (n % 2) ? ROR32(a.w[0], (n + 1) / 2) : ROR32(a.w[1], n / 2);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    state_t t;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    t.x[0] = s->x[0] ^ (~s->x[1] & s->x[2]);
+    t.x[2] = s->x[2] ^ (~s->x[3] & s->x[4]);
+    t.x[4] = s->x[4] ^ (~s->x[0] & s->x[1]);
+    t.x[1] = s->x[1] ^ (~s->x[2] & s->x[3]);
+    t.x[3] = s->x[3] ^ (~s->x[4] & s->x[0]);
+    t.x[1] ^= t.x[0];
+    t.x[3] ^= t.x[2];
+    t.x[0] ^= t.x[4];
+    /* linear layer */
+    s->x[2] = t.x[2] ^ ROR(t.x[2], 6 - 1);
+    s->x[3] = t.x[3] ^ ROR(t.x[3], 17 - 10);
+    s->x[4] = t.x[4] ^ ROR(t.x[4], 41 - 7);
+    s->x[0] = t.x[0] ^ ROR(t.x[0], 28 - 19);
+    s->x[1] = t.x[1] ^ ROR(t.x[1], 61 - 39);
+    s->x[2] = t.x[2] ^ ROR(s->x[2], 1);
+    s->x[3] = t.x[3] ^ ROR(s->x[3], 10);
+    s->x[4] = t.x[4] ^ ROR(s->x[4], 7);
+    s->x[0] = t.x[0] ^ ROR(s->x[0], 19);
+    s->x[1] = t.x[1] ^ ROR(s->x[1], 39);
+    s->x[2] = ~s->x[2];
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xc0000000c);
+        ROUND(s, 0xc00000009);
+        ROUND(s, 0x90000000c);
+        ROUND(s, 0x900000009);
+        ROUND(s, 0xc00000006);
+        ROUND(s, 0xc00000003);
+    case 6:
+        ROUND(s, 0x900000006);
+        ROUND(s, 0x900000003);
+        ROUND(s, 0x60000000c);
+        ROUND(s, 0x600000009);
+        ROUND(s, 0x30000000c);
+    default:
+        ROUND(s, 0x300000009);
+        ;
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/crypto_aead.c

+../bi_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/isap.c

+../bi_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_compact/isap.h

+../bi_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/api.h

+../bi_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+#define P_PVP PROUNDS(s, 7)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) to_bit_interleaving(U64BIG(x))
+#define WORDTOU64(x) U64BIG(from_bit_interleaving(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) to_bit_interleaving(x)
+#define FROMBI(x) from_bit_interleaving(x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t to_bit_interleaving(lane_t in)
+{
+    uint32_t lo = in.w[0];
+    uint32_t hi = in.w[1];
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    lane_t out;
+    out.w[0] = (lo & 0x0000FFFF) | (hi << 16);
+    out.w[1] = (lo >> 16) | (hi & 0xFFFF0000);
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
+lane_t from_bit_interleaving(lane_t in)
+{
+    uint32_t lo = ((in).w[0] & 0x0000FFFF) | ((in).w[1] << 16);
+    uint32_t hi = ((in).w[0] >> 16) | ((in).w[1] & 0xFFFF0000);
+    uint32_t r0, r1;
+    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
+    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
+    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
+    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
+    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
+    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
+    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
+    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
+    lane_t out;
+    out.x = (uint64_t)hi << 32 | lo;
+    return out;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint32_t ROR32(uint32_t x, int n)
+{
+    return x >> n | x << (-n & 31);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint64_t ROR(uint64_t x, int n)
+{
+    lane_t b, a = {.x = x};
+    b.w[0] = (n % 2) ? ROR32(a.w[1], (n - 1) / 2) : ROR32(a.w[0], n / 2);
+    b.w[1] = (n % 2) ? ROR32(a.w[0], (n + 1) / 2) : ROR32(a.w[1], n / 2);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    state_t t;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    t.x[0] = s->x[0] ^ (~s->x[1] & s->x[2]);
+    t.x[2] = s->x[2] ^ (~s->x[3] & s->x[4]);
+    t.x[4] = s->x[4] ^ (~s->x[0] & s->x[1]);
+    t.x[1] = s->x[1] ^ (~s->x[2] & s->x[3]);
+    t.x[3] = s->x[3] ^ (~s->x[4] & s->x[0]);
+    t.x[1] ^= t.x[0];
+    t.x[3] ^= t.x[2];
+    t.x[0] ^= t.x[4];
+    /* linear layer */
+    s->x[2] = t.x[2] ^ ROR(t.x[2], 6 - 1);
+    s->x[3] = t.x[3] ^ ROR(t.x[3], 17 - 10);
+    s->x[4] = t.x[4] ^ ROR(t.x[4], 41 - 7);
+    s->x[0] = t.x[0] ^ ROR(t.x[0], 28 - 19);
+    s->x[1] = t.x[1] ^ ROR(t.x[1], 61 - 39);
+    s->x[2] = t.x[2] ^ ROR(s->x[2], 1);
+    s->x[3] = t.x[3] ^ ROR(s->x[3], 10);
+    s->x[4] = t.x[4] ^ ROR(s->x[4], 7);
+    s->x[0] = t.x[0] ^ ROR(s->x[0], 19);
+    s->x[1] = t.x[1] ^ ROR(s->x[1], 39);
+    s->x[2] = ~s->x[2];
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xc0000000c);
+        ROUND(s, 0xc00000009);
+        ROUND(s, 0x90000000c);
+        ROUND(s, 0x900000009);
+        ROUND(s, 0xc00000006);
+    case 7:
+        ROUND(s, 0xc00000003);
+    case 6:
+        ROUND(s, 0x900000006);
+        ROUND(s, 0x900000003);
+        ROUND(s, 0x60000000c);
+        ROUND(s, 0x600000009);
+        ROUND(s, 0x30000000c);
+    default:
+        ROUND(s, 0x300000009);
+        ;
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen + ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0)
+	{
+		isap_enc(k, npub, m, mlen, c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c + mlen;
+	isap_mac(k, npub, ad, adlen, c, mlen, tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen - ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char T[16];
+	isap_mac(k, npub, ad, adlen, c, *mlen, T);
+
+	// Compare tag
+	unsigned char T_star[16];
+	for (int i = 0; i < 16; i++)
+    {
+        T_star[i] = *(c + *mlen + i);
+    }
+	int eq_cnt = pvp(T, T_star);
+
+	// Perform decryption if tag is correct
+	if (eq_cnt == ISAP_TAG_SZ)
+	{
+		if (*mlen > 0)
+		{
+			isap_enc(k, npub, c, *mlen, m);
+		}
+		return 0;
+	}
+	else
+	{
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/forceinline.h

+../bi_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+// Needed for LR tag comparison
+uint64_t s0, s1;
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Needed for LR tag comparison
+    s0 = s->x[0];
+    s1 = s->x[1];
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/* Leakage resilient tag comparison.                                          */
+/* Similar to Fig.3 of https://eprint.iacr.org/2021/402.pdf.                  */
+/******************************************************************************/
+
+int pvp(
+    const uint8_t *T, const uint8_t *T_star)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Calculate U
+    s->l[0] = U64TOWORD(*(lane_t *)(T + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+    uint64_t u0, u1;
+    u0 = s->x[0];
+    u1 = s->x[1];
+
+    // Calculate U'
+    s->l[0] = U64TOWORD(*(lane_t *)(T_star + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T_star + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+
+    // Compare tag
+    int eq_cnt = 0;
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[0][i] == ((uint8_t *)&u0)[i]);
+    }
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[1][i] == ((uint8_t *)&u1)[i]);
+    }
+    return eq_cnt;
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_32_stp/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+int pvp(
+	const unsigned char *T,
+	const unsigned char *T_star);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
+
+#endif
+

isap/Implementations/crypto_aead/isapa128av20/bi_8/api.h

+#ifndef API_H
+#define API_H
+
+// isapa128a
+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+
+// asconhashv12
+#define CRYPTO_BYTES 32
+#define ASCON_HASH_OUTLEN 32
+#define ASCON_HASH_ROUNDS 12
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_8/asconp.h

+#ifndef ASCONP_H
+#define ASCONP_H
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) interleave8(U64BIG(x))
+#define WORDTOU64(x) U64BIG(interleave8(x))
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) interleave8(x)
+#define FROMBI(x) interleave8(x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint8_t ROR8(uint8_t a, int n) { return a >> n | a << (8 - n); }
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint64_t ROR(uint64_t x, int n)
+{
+    lane_t b, a = {.x = x};
+    b.b[0] = ROR8(a.b[(n + 0) & 0x7], (n + 0) >> 3);
+    b.b[1] = ROR8(a.b[(n + 1) & 0x7], (n + 1) >> 3);
+    b.b[2] = ROR8(a.b[(n + 2) & 0x7], (n + 2) >> 3);
+    b.b[3] = ROR8(a.b[(n + 3) & 0x7], (n + 3) >> 3);
+    b.b[4] = ROR8(a.b[(n + 4) & 0x7], (n + 4) >> 3);
+    b.b[5] = ROR8(a.b[(n + 5) & 0x7], (n + 5) >> 3);
+    b.b[6] = ROR8(a.b[(n + 6) & 0x7], (n + 6) >> 3);
+    b.b[7] = ROR8(a.b[(n + 7) & 0x7], (n + 7) >> 3);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+forceinline lane_t interleave8(lane_t x)
+{
+    x.x = (x.x & 0xaa55aa55aa55aa55ull) | ((x.x & 0x00aa00aa00aa00aaull) << 7) |
+          ((x.x >> 7) & 0x00aa00aa00aa00aaull);
+    x.x = (x.x & 0xcccc3333cccc3333ull) | ((x.x & 0x0000cccc0000ccccull) << 14) |
+          ((x.x >> 14) & 0x0000cccc0000ccccull);
+    x.x = (x.x & 0xf0f0f0f00f0f0f0full) | ((x.x & 0x00000000f0f0f0f0ull) << 28) |
+          ((x.x >> 28) & 0x00000000f0f0f0f0ull);
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint64_t C)
+{
+    uint64_t xtemp;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    xtemp = s->x[0] & ~s->x[4];
+    s->x[0] ^= s->x[2] & ~s->x[1];
+    s->x[2] ^= s->x[4] & ~s->x[3];
+    s->x[4] ^= s->x[1] & ~s->x[0];
+    s->x[1] ^= s->x[3] & ~s->x[2];
+    s->x[3] ^= xtemp;
+    s->x[1] ^= s->x[0];
+    s->x[3] ^= s->x[2];
+    s->x[0] ^= s->x[4];
+    /* linear layer */
+    xtemp = s->x[0] ^ ROR(s->x[0], 28 - 19);
+    s->x[0] ^= ROR(xtemp, 19);
+    xtemp = s->x[1] ^ ROR(s->x[1], 61 - 39);
+    s->x[1] ^= ROR(xtemp, 39);
+    xtemp = s->x[2] ^ ROR(s->x[2], 6 - 1);
+    s->x[2] ^= ROR(xtemp, 1);
+    xtemp = s->x[3] ^ ROR(s->x[3], 17 - 10);
+    s->x[3] ^= ROR(xtemp, 10);
+    xtemp = s->x[4] ^ ROR(s->x[4], 41 - 7);
+    s->x[4] ^= ROR(xtemp, 7);
+    s->x[2] = ~s->x[2];
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0x0101010100000000ull);
+        ROUND(s, 0x0101010000000001ull);
+        ROUND(s, 0x0101000100000100ull);
+        ROUND(s, 0x0101000000000101ull);
+        ROUND(s, 0x0100010100010000ull);
+        ROUND(s, 0x0100010000010001ull);
+    case 6:
+        ROUND(s, 0x0100000100010100ull);
+        ROUND(s, 0x0100000000010101ull);
+        ROUND(s, 0x0001010101000000ull);
+        ROUND(s, 0x0001010001000001ull);
+        ROUND(s, 0x0001000101000100ull);
+    default:
+        ROUND(s, 0x0001000001000101ull);
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/bi_8/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/bi_8/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen+ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0) {
+		isap_enc(k,npub,m,mlen,c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c+mlen;
+	isap_mac(k,npub,ad,adlen,c,mlen,tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen-ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char tag[ISAP_TAG_SZ];
+	isap_mac(k,npub,ad,adlen,c,*mlen,tag);
+
+	// Compare tag
+	unsigned long eq_cnt = 0;
+	for(unsigned int i = 0; i < ISAP_TAG_SZ; i++) {
+		eq_cnt += (tag[i] == c[(*mlen)+i]);
+	}
+
+	// Perform decryption if tag is correct
+	if(eq_cnt == (unsigned long)ISAP_TAG_SZ){
+		if (*mlen > 0) {
+			isap_enc(k,npub,c,*mlen,m);
+		}
+		return 0;
+	} else {
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/bi_8/forceinline.h

+#ifndef FORCEINLINE_H_
+#define FORCEINLINE_H_
+
+/* define forceinline macro */
+#ifdef _MSC_VER
+#define forceinline __forceinline
+#elif defined(__GNUC__)
+#define forceinline inline __attribute__((__always_inline__))
+#elif defined(__CLANG__)
+#if __has_attribute(__always_inline__)
+#define forceinline inline __attribute__((__always_inline__))
+#else
+#define forceinline inline
+#endif
+#else
+#define forceinline inline
+#endif
+
+#endif /* FORCEINLINE_H_ */

isap/Implementations/crypto_aead/isapa128av20/bi_8/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/bi_8/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_32/api.h

 #ifndef API_H
 #define API_H
 
-#define CRYPTO_VERSION "2.0.1"
+// isapa128a
 #define CRYPTO_KEYBYTES 16
 #define CRYPTO_NSECBYTES 0
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
 
+// asconhashv12
+#define CRYPTO_BYTES 32
+#define ASCON_HASH_OUTLEN 32
+#define ASCON_HASH_ROUNDS 12
+
 #endif

isap/Implementations/crypto_aead/isapa128av20/opt_32/asconp.h

@@ -2,139 +2,122 @@
 #define ASCONP_H_
 
 #include <inttypes.h>
+#include "forceinline.h"
 
-typedef unsigned char u8;
-typedef uint32_t u32;
-typedef unsigned long long u64;
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
 
-typedef struct
+typedef union
 {
-    u32 e;
-    u32 o;
-} u32_2;
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
 
-// Round constants, bit-interleaved
-u32 rc_o[12] = {0xc, 0xc, 0x9, 0x9, 0xc, 0xc, 0x9, 0x9, 0x6, 0x6, 0x3, 0x3};
-u32 rc_e[12] = {0xc, 0x9, 0xc, 0x9, 0x6, 0x3, 0x6, 0x3, 0xc, 0x9, 0xc, 0x9};
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
 
 /* ---------------------------------------------------------------- */
 
-u64 U64BIG(u64 x)
+forceinline lane_t U64BIG(lane_t x)
 {
-    return ((((x)&0x00000000000000FFULL) << 56) | (((x)&0x000000000000FF00ULL) << 40) |
-            (((x)&0x0000000000FF0000ULL) << 24) | (((x)&0x00000000FF000000ULL) << 8) |
-            (((x)&0x000000FF00000000ULL) >> 8) | (((x)&0x0000FF0000000000ULL) >> 24) |
-            (((x)&0x00FF000000000000ULL) >> 40) | (((x)&0xFF00000000000000ULL) >> 56));
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
 }
 
 /* ---------------------------------------------------------------- */
 
-// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
-void to_bit_interleaving(u32_2 *out, u64 in)
+forceinline void ROUND(state_t *s, uint8_t C)
 {
-    u32 hi = (in) >> 32;
-    u32 lo = (u32)(in);
-    u32 r0, r1;
-    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
-    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
-    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
-    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
-    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
-    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
-    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
-    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
-    (*out).e = (lo & 0x0000FFFF) | (hi << 16);
-    (*out).o = (lo >> 16) | (hi & 0xFFFF0000);
+    uint64_t xtemp;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    xtemp = s->x[0] & ~s->x[4];
+    s->x[0] ^= s->x[2] & ~s->x[1];
+    s->x[2] ^= s->x[4] & ~s->x[3];
+    s->x[4] ^= s->x[1] & ~s->x[0];
+    s->x[1] ^= s->x[3] & ~s->x[2];
+    s->x[3] ^= xtemp;
+    s->x[1] ^= s->x[0];
+    s->x[3] ^= s->x[2];
+    s->x[0] ^= s->x[4];
+    s->x[2] = ~s->x[2];
+    /* linear layer */
+    s->x[0] ^=
+        (s->x[0] >> 19) ^ (s->x[0] << 45) ^ (s->x[0] >> 28) ^ (s->x[0] << 36);
+    s->x[1] ^=
+        (s->x[1] >> 61) ^ (s->x[1] << 3) ^ (s->x[1] >> 39) ^ (s->x[1] << 25);
+    s->x[2] ^=
+        (s->x[2] >> 1) ^ (s->x[2] << 63) ^ (s->x[2] >> 6) ^ (s->x[2] << 58);
+    s->x[3] ^=
+        (s->x[3] >> 10) ^ (s->x[3] << 54) ^ (s->x[3] >> 17) ^ (s->x[3] << 47);
+    s->x[4] ^=
+        (s->x[4] >> 7) ^ (s->x[4] << 57) ^ (s->x[4] >> 41) ^ (s->x[4] << 23);
 }
 
 /* ---------------------------------------------------------------- */
 
-// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
-void from_bit_interleaving(u64 *out, u32_2 in)
+forceinline void P12ROUNDS(state_t *s)
 {
-    u32 lo = ((in).e & 0x0000FFFF) | ((in).o << 16);
-    u32 hi = ((in).e >> 16) | ((in).o & 0xFFFF0000);
-    u32 r0, r1;
-    r0 = (lo ^ (lo >> 8)) & 0x0000FF00, lo ^= r0 ^ (r0 << 8);
-    r0 = (lo ^ (lo >> 4)) & 0x00F000F0, lo ^= r0 ^ (r0 << 4);
-    r0 = (lo ^ (lo >> 2)) & 0x0C0C0C0C, lo ^= r0 ^ (r0 << 2);
-    r0 = (lo ^ (lo >> 1)) & 0x22222222, lo ^= r0 ^ (r0 << 1);
-    r1 = (hi ^ (hi >> 8)) & 0x0000FF00, hi ^= r1 ^ (r1 << 8);
-    r1 = (hi ^ (hi >> 4)) & 0x00F000F0, hi ^= r1 ^ (r1 << 4);
-    r1 = (hi ^ (hi >> 2)) & 0x0C0C0C0C, hi ^= r1 ^ (r1 << 2);
-    r1 = (hi ^ (hi >> 1)) & 0x22222222, hi ^= r1 ^ (r1 << 1);
-    *out = (u64)hi << 32 | lo;
+    ROUND(s, 0xf0);
+    ROUND(s, 0xe1);
+    ROUND(s, 0xd2);
+    ROUND(s, 0xc3);
+    ROUND(s, 0xb4);
+    ROUND(s, 0xa5);
+    ROUND(s, 0x96);
+    ROUND(s, 0x87);
+    ROUND(s, 0x78);
+    ROUND(s, 0x69);
+    ROUND(s, 0x5a);
+    ROUND(s, 0x4b);
 }
 
 /* ---------------------------------------------------------------- */
 
-#define ROTR32(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x96);
+    ROUND(s, 0x87);
+    ROUND(s, 0x78);
+    ROUND(s, 0x69);
+    ROUND(s, 0x5a);
+    ROUND(s, 0x4b);
+}
 
 /* ---------------------------------------------------------------- */
 
-void static inline PX(u32 rounds, u32_2* x0, u32_2* x1, u32_2* x2, u32_2* x3, u32_2* x4) {
-    u32_2 t0, t1, t2, t3, t4;
-    for (u32 r = 12 - rounds; r < 12; r++){
-        /* rcon */             
-        (*x2).e ^= rc_e[r];
-        (*x2).o ^= rc_o[r];
-        /* non-linear layer */             
-        (*x0).e ^= (*x4).e;
-        (*x0).o ^= (*x4).o;
-        (*x4).e ^= (*x3).e;
-        (*x4).o ^= (*x3).o;
-        (*x2).e ^= (*x1).e;
-        (*x2).o ^= (*x1).o;
-        (t0).e = (*x0).e;
-        (t0).o = (*x0).o;
-        (t4).e = (*x4).e;
-        (t4).o = (*x4).o;
-        (t3).e = (*x3).e;
-        (t3).o = (*x3).o;
-        (t1).e = (*x1).e;
-        (t1).o = (*x1).o;
-        (t2).e = (*x2).e;
-        (t2).o = (*x2).o;
-        (*x0).e = t0.e ^ (~t1.e & t2.e);
-        (*x0).o = t0.o ^ (~t1.o & t2.o);
-        (*x2).e = t2.e ^ (~t3.e & t4.e);
-        (*x2).o = t2.o ^ (~t3.o & t4.o);
-        (*x4).e = t4.e ^ (~t0.e & t1.e);
-        (*x4).o = t4.o ^ (~t0.o & t1.o);
-        (*x1).e = t1.e ^ (~t2.e & t3.e);
-        (*x1).o = t1.o ^ (~t2.o & t3.o);
-        (*x3).e = t3.e ^ (~t4.e & t0.e);
-        (*x3).o = t3.o ^ (~t4.o & t0.o);
-        (*x1).e ^= (*x0).e;
-        (*x1).o ^= (*x0).o;
-        (*x3).e ^= (*x2).e;
-        (*x3).o ^= (*x2).o;
-        (*x0).e ^= (*x4).e;
-        (*x0).o ^= (*x4).o;
-        /* linear layer */             
-        t0.e = (*x0).e ^ ROTR32((*x0).o, 4);
-        t0.o = (*x0).o ^ ROTR32((*x0).e, 5);
-        t1.e = (*x1).e ^ ROTR32((*x1).e, 11);
-        t1.o = (*x1).o ^ ROTR32((*x1).o, 11);
-        t2.e = (*x2).e ^ ROTR32((*x2).o, 2);
-        t2.o = (*x2).o ^ ROTR32((*x2).e, 3);
-        t3.e = (*x3).e ^ ROTR32((*x3).o, 3);
-        t3.o = (*x3).o ^ ROTR32((*x3).e, 4);
-        t4.e = (*x4).e ^ ROTR32((*x4).e, 17);
-        t4.o = (*x4).o ^ ROTR32((*x4).o, 17);
-        (*x0).e ^= ROTR32(t0.o, 9);
-        (*x0).o ^= ROTR32(t0.e, 10);
-        (*x1).e ^= ROTR32(t1.o, 19);
-        (*x1).o ^= ROTR32(t1.e, 20);
-        (*x2).e ^= t2.o;
-        (*x2).o ^= ROTR32(t2.e, 1);
-        (*x3).e ^= ROTR32(t3.e, 5);
-        (*x3).o ^= ROTR32(t3.o, 5);
-        (*x4).e ^= ROTR32(t4.o, 3);
-        (*x4).o ^= ROTR32(t4.e, 4);
-        (*x2).e = ~(*x2).e;
-        (*x2).o = ~(*x2).o;
-    }
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x4b);
 }
 
+/* ---------------------------------------------------------------- */
+
 #endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_32/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_32/forceinline.h

+#ifndef FORCEINLINE_H_
+#define FORCEINLINE_H_
+
+/* define forceinline macro */
+#ifdef _MSC_VER
+#define forceinline __forceinline
+#elif defined(__GNUC__)
+#define forceinline inline __attribute__((__always_inline__))
+#elif defined(__CLANG__)
+#if __has_attribute(__always_inline__)
+#define forceinline inline __attribute__((__always_inline__))
+#else
+#define forceinline inline
+#endif
+#else
+#define forceinline inline
+#endif
+
+#endif /* FORCEINLINE_H_ */

isap/Implementations/crypto_aead/isapa128av20/opt_32/isap.c

+#include <string.h>
+#include <inttypes.h>
 #include "api.h"
 #include "isap.h"
 #include "asconp.h"
+#include "config.h"
 
-const u8 ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
-const u8 ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
-const u8 ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
 
-#define P_sB PX(1,&x0,&x1,&x2,&x3,&x4)
-#define P_sE PX(6,&x0,&x1,&x2,&x3,&x4)
-#define P_sH PX(12,&x0,&x1,&x2,&x3,&x4)
-#define P_sK PX(12,&x0,&x1,&x2,&x3,&x4)
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
 
 /******************************************************************************/
 /*                                 ISAP_RK                                    */
 /******************************************************************************/
 
 void isap_rk(
-    const u8 *k,
-    const u8 *iv,
-    const u8 *y,
-    u8 *out,
-    const u8 outlen)
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
 {
-    // State variables
-    u32_2 x0, x1, x2, x3, x4;
+    state_t state;
+    state_t *s = &state;
 
     // Initialize
-    to_bit_interleaving(&x0, U64BIG(*(u64 *)(k + 0)));
-    to_bit_interleaving(&x1, U64BIG(*(u64 *)(k + 8)));
-    to_bit_interleaving(&x2, U64BIG(*(u64 *)(iv + 0)));
-    x3.o = 0;
-    x3.e = 0;
-    x4.o = 0;
-    x4.e = 0;
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
     P_sK;
 
     // Absorb Y, bit by bit
-    for (u8 i = 0; i < 127; i++) {
-        u8 cur_byte_pos = i / 8;
-        u8 cur_bit_pos = 7 - (i % 8);
-        u32 cur_bit = ((y[cur_byte_pos] >> (cur_bit_pos)) & 0x01) << 7;
-        x0.o ^= ((u32)cur_bit) << 24;
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
         P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
     }
-    u8 cur_bit = ((y[15]) & 0x01) << 7;
-    x0.o ^= ((u32)cur_bit) << (24);
 
-    // Squeeze - Derive K*
+    // Squeeze K*
     P_sK;
-    *(u32 *)(out + 0) = x0.o;
-    *(u32 *)(out + 4) = x0.e;
-    *(u32 *)(out + 8) = x1.o;
-    *(u32 *)(out + 12) = x1.e;
-    if (outlen > 16) {
-        *(u32 *)(out + 16) = x2.o;
-        *(u32 *)(out + 20) = x2.e;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
     }
 }
 
@@ -63,121 +103,43 @@ void isap_rk(
 /******************************************************************************/
 
 void isap_mac(
-    const u8 *k,
-    const u8 *npub,
-    const u8 *ad, u64 adlen,
-    const u8 *c, u64 clen,
-    u8 *tag)
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
 {
-    // State and temporary variables
-    u32_2 x0, x1, x2, x3, x4;
-    u32_2 t0;
-    u64 tmp0;
+    state_t state;
+    state_t *s = &state;
 
     // Initialize
-    to_bit_interleaving(&x0, U64BIG(*(u64 *)npub + 0));
-    to_bit_interleaving(&x1, U64BIG(*(u64 *)(npub + 8)));
-    to_bit_interleaving(&x2, U64BIG(*(u64 *)(ISAP_IV_A)));
-    x3.o = 0;
-    x3.e = 0;
-    x4.o = 0;
-    x4.e = 0;
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
     P_sH;
 
-    // Absorb full lanes of AD
-    while (adlen >= 8)
-    {
-        to_bit_interleaving(&t0, U64BIG(*(u64 *)ad));
-        x0.e ^= t0.e;
-        x0.o ^= t0.o;
-        adlen -= ISAP_rH / 8;
-        ad += ISAP_rH / 8;
-        P_sH;
-    }
-
-    // Absorb partial lane of AD and add padding
-    if (adlen > 0)
-    {
-        tmp0 = 0;
-        u8 *tmp0_bytes = (u8 *)&tmp0;
-        u8 i;
-        for (i = 0; i < adlen; i++)
-        {
-            tmp0_bytes[i] = *ad;
-            ad += 1;
-        }
-        tmp0_bytes[i] = 0x80;
-        to_bit_interleaving(&t0, U64BIG(tmp0));
-        x0.e ^= t0.e;
-        x0.o ^= t0.o;
-        P_sH;
-    }
-
-    // Absorb AD padding if not already done before
-    if (adlen == 0)
-    {
-        x0.o ^= 0x80000000;
-        P_sH;
-    }
-
-    // Domain Seperation
-    x4.e ^= ((u32)0x01);
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
 
-    // Absorb full lanes of C
-    while (clen >= 8)
-    {
-        to_bit_interleaving(&t0, U64BIG(*(u64 *)c));
-        x0.e ^= t0.e;
-        x0.o ^= t0.o;
-        P_sH;
-        clen -= ISAP_rH / 8;
-        c += ISAP_rH / 8;
-    }
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
 
-    // Absorb partial lane of C and add padding
-    if (clen > 0)
-    {
-        tmp0 = 0;
-        u8 *tmp0_bytes = (u8 *)&tmp0;
-        u8 i;
-        for (i = 0; i < clen; i++)
-        {
-            tmp0_bytes[i] = *c;
-            c += 1;
-        }
-        tmp0_bytes[i] = 0x80;
-        to_bit_interleaving(&t0, U64BIG(tmp0));
-        x0.e ^= t0.e;
-        x0.o ^= t0.o;
-        P_sH;
-    }
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
 
-    // Absorb C padding if not already done before
-    if (clen == 0)
-    {
-        x0.o ^= 0x80000000;
-        P_sH;
-    }
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
 
-    // Finalize - Derive Ka*
-    u64 y64[CRYPTO_KEYBYTES / 8];
-    from_bit_interleaving(&tmp0, x0);
-    y64[0] = U64BIG(tmp0);
-    from_bit_interleaving(&tmp0, x1);
-    y64[1] = U64BIG(tmp0);
-    u32 ka_star32[CRYPTO_KEYBYTES / 4];
-    isap_rk(k, ISAP_IV_KA, (u8 *)y64, (u8 *)ka_star32, CRYPTO_KEYBYTES);
-
-    // Finalize - Squeeze T
-    x0.o = ka_star32[0];
-    x0.e = ka_star32[1];
-    x1.o = ka_star32[2];
-    x1.e = ka_star32[3];
+    // Squeeze tag
     P_sH;
-    from_bit_interleaving(&tmp0, x0);
-    *(u64 *)(tag + 0) = U64BIG(tmp0);
-    from_bit_interleaving(&tmp0, x1);
-    *(u64 *)(tag + 8) = U64BIG(tmp0);
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
 }
 
 /******************************************************************************/
@@ -185,52 +147,80 @@ void isap_mac(
 /******************************************************************************/
 
 void isap_enc(
-    const u8 *k,
-    const u8 *npub,
-    const u8 *m, u64 mlen,
-    u8 *c)
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
 {
-    // Derive Ke
-    u8 ke[ISAP_STATE_SZ - CRYPTO_NPUBBYTES];
-    isap_rk(k, ISAP_IV_KE, npub, ke, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
-
-    // State and temporary variables
-    u32_2 x0, x1, x2, x3, x4;
-    u64 tmp0;
-
-    // Init State
-    x0.o = *(u32 *)(ke + 0);
-    x0.e = *(u32 *)(ke + 4);
-    x1.o = *(u32 *)(ke + 8);
-    x1.e = *(u32 *)(ke + 12);
-    x2.o = *(u32 *)(ke + 16);
-    x2.e = *(u32 *)(ke + 20);
-    to_bit_interleaving(&x3, U64BIG(*(u64 *)npub));
-    to_bit_interleaving(&x4, U64BIG(*(u64 *)(npub + 8)));
-
-    // Squeeze full lanes
-    while (mlen >= 8)
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
     {
+        // Encrypt full lanes
         P_sE;
-        from_bit_interleaving(&tmp0, x0);
-        *(u64 *)c = *(u64 *)m ^ U64BIG(tmp0);
-        mlen -= 8;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
         m += ISAP_rH / 8;
         c += ISAP_rH / 8;
     }
 
-    // Squeeze partial lane
     if (mlen > 0)
     {
+        // Encrypt partial lanes
         P_sE;
-        from_bit_interleaving(&tmp0, x0);
-        tmp0 = U64BIG(tmp0);
-        u8 *tmp0_bytes = (u8 *)&tmp0;
-        for (u8 i = 0; i < mlen; i++)
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
         {
-            *c = *m ^ tmp0_bytes[i];
+            *c = *m ^ t0.b[i];
             m += 1;
             c += 1;
         }
     }
 }
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_32/isap.h

-#ifndef ISAP_H
-#define ISAP_H
+#ifndef ISAP_H_
+#define ISAP_H_
+
+#include <inttypes.h>
 
 // Rate in bits
 #define ISAP_rH 64
@@ -27,23 +29,16 @@
 #define ISAP_K 128
 
 void isap_mac(
-	const unsigned char *k,
-	const unsigned char *npub,
-	const unsigned char *ad, unsigned long long adlen,
-	const unsigned char *c, unsigned long long clen,
-	unsigned char *tag);
-
-void isap_rk(
-	const unsigned char *k,
-	const unsigned char *iv,
-	const unsigned char *in,
-	unsigned char *out,
-	const unsigned char outlen);
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
 
 void isap_enc(
-	const unsigned char *k,
-	const unsigned char *npub,
-	const unsigned char *m, unsigned long long mlen,
-	unsigned char *c);
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
 
-#endif
+#endif // ISAP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/api.h

+../opt_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint8_t C)
+{
+    uint64_t xtemp;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    xtemp = s->x[0] & ~s->x[4];
+    s->x[0] ^= s->x[2] & ~s->x[1];
+    s->x[2] ^= s->x[4] & ~s->x[3];
+    s->x[4] ^= s->x[1] & ~s->x[0];
+    s->x[1] ^= s->x[3] & ~s->x[2];
+    s->x[3] ^= xtemp;
+    s->x[1] ^= s->x[0];
+    s->x[3] ^= s->x[2];
+    s->x[0] ^= s->x[4];
+    s->x[2] = ~s->x[2];
+    /* linear layer */
+    s->x[0] ^=
+        (s->x[0] >> 19) ^ (s->x[0] << 45) ^ (s->x[0] >> 28) ^ (s->x[0] << 36);
+    s->x[1] ^=
+        (s->x[1] >> 61) ^ (s->x[1] << 3) ^ (s->x[1] >> 39) ^ (s->x[1] << 25);
+    s->x[2] ^=
+        (s->x[2] >> 1) ^ (s->x[2] << 63) ^ (s->x[2] >> 6) ^ (s->x[2] << 58);
+    s->x[3] ^=
+        (s->x[3] >> 10) ^ (s->x[3] << 54) ^ (s->x[3] >> 17) ^ (s->x[3] << 47);
+    s->x[4] ^=
+        (s->x[4] >> 7) ^ (s->x[4] << 57) ^ (s->x[4] >> 41) ^ (s->x[4] << 23);
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xf0);
+        ROUND(s, 0xe1);
+        ROUND(s, 0xd2);
+        ROUND(s, 0xc3);
+        ROUND(s, 0xb4);
+        ROUND(s, 0xa5);
+    case 6:
+        ROUND(s, 0x96);
+        ROUND(s, 0x87);
+        ROUND(s, 0x78);
+        ROUND(s, 0x69);
+        ROUND(s, 0x5a);
+    default:
+        ROUND(s, 0x4b);
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/crypto_aead.c

+../opt_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/forceinline.h

+../opt_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/isap.c

+../opt_32/isap.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_compact/isap.h

+../opt_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/api.h

+../opt_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+#define P_PVP PROUNDS(s, 7)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint8_t C)
+{
+    uint64_t xtemp;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    xtemp = s->x[0] & ~s->x[4];
+    s->x[0] ^= s->x[2] & ~s->x[1];
+    s->x[2] ^= s->x[4] & ~s->x[3];
+    s->x[4] ^= s->x[1] & ~s->x[0];
+    s->x[1] ^= s->x[3] & ~s->x[2];
+    s->x[3] ^= xtemp;
+    s->x[1] ^= s->x[0];
+    s->x[3] ^= s->x[2];
+    s->x[0] ^= s->x[4];
+    s->x[2] = ~s->x[2];
+    /* linear layer */
+    s->x[0] ^=
+        (s->x[0] >> 19) ^ (s->x[0] << 45) ^ (s->x[0] >> 28) ^ (s->x[0] << 36);
+    s->x[1] ^=
+        (s->x[1] >> 61) ^ (s->x[1] << 3) ^ (s->x[1] >> 39) ^ (s->x[1] << 25);
+    s->x[2] ^=
+        (s->x[2] >> 1) ^ (s->x[2] << 63) ^ (s->x[2] >> 6) ^ (s->x[2] << 58);
+    s->x[3] ^=
+        (s->x[3] >> 10) ^ (s->x[3] << 54) ^ (s->x[3] >> 17) ^ (s->x[3] << 47);
+    s->x[4] ^=
+        (s->x[4] >> 7) ^ (s->x[4] << 57) ^ (s->x[4] >> 41) ^ (s->x[4] << 23);
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xf0);
+        ROUND(s, 0xe1);
+        ROUND(s, 0xd2);
+        ROUND(s, 0xc3);
+        ROUND(s, 0xb4);
+    case 7:
+        ROUND(s, 0xa5);
+    case 6:
+        ROUND(s, 0x96);
+        ROUND(s, 0x87);
+        ROUND(s, 0x78);
+        ROUND(s, 0x69);
+        ROUND(s, 0x5a);
+    default:
+        ROUND(s, 0x4b);
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen + ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0)
+	{
+		isap_enc(k, npub, m, mlen, c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c + mlen;
+	isap_mac(k, npub, ad, adlen, c, mlen, tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k)
+{
+	(void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen - ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char T[16];
+	isap_mac(k, npub, ad, adlen, c, *mlen, T);
+
+	// Compare tag
+	unsigned char T_star[16];
+	for (int i = 0; i < 16; i++)
+    {
+        T_star[i] = *(c + *mlen + i);
+    }
+	int eq_cnt = pvp(T, T_star);
+
+	// Perform decryption if tag is correct
+	if (eq_cnt == ISAP_TAG_SZ)
+	{
+		if (*mlen > 0)
+		{
+			isap_enc(k, npub, c, *mlen, m);
+		}
+		return 0;
+	}
+	else
+	{
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/forceinline.h

+../opt_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+// Needed for LR tag comparison
+uint64_t s0, s1;
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Needed for LR tag comparison
+    s0 = s->x[0];
+    s1 = s->x[1];
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/* Leakage resilient tag comparison.                                          */
+/* Similar to Fig.3 of https://eprint.iacr.org/2021/402.pdf.                  */
+/******************************************************************************/
+
+int pvp(
+    const uint8_t *T, const uint8_t *T_star)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Calculate U
+    s->l[0] = U64TOWORD(*(lane_t *)(T + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+    uint64_t u0, u1;
+    u0 = s->x[0];
+    u1 = s->x[1];
+
+    // Calculate U'
+    s->l[0] = U64TOWORD(*(lane_t *)(T_star + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(T_star + 8));
+    s->x[2] = s0;
+    s->x[3] = s1;
+    s->x[4] = 0;
+    P_PVP;
+
+    // Compare tag
+    int eq_cnt = 0;
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[0][i] == ((uint8_t *)&u0)[i]);
+    }
+    for (size_t i = 0; i < 8; i++)
+    {
+        eq_cnt += (s->b[1][i] == ((uint8_t *)&u1)[i]);
+    }
+    return eq_cnt;
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_32_stp/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+int pvp(
+	const uint8_t *T,
+	const uint8_t *T_star);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, uint64_t mlen,
+	uint8_t *c);
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/api.h

+../opt_32/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/asconp.h

+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+void ROUND(state_t *s, uint8_t C)
+{
+    uint64_t xtemp;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    xtemp = s->x[0] & ~s->x[4];
+    s->x[0] ^= s->x[2] & ~s->x[1];
+    s->x[2] ^= s->x[4] & ~s->x[3];
+    s->x[4] ^= s->x[1] & ~s->x[0];
+    s->x[1] ^= s->x[3] & ~s->x[2];
+    s->x[3] ^= xtemp;
+    s->x[1] ^= s->x[0];
+    s->x[3] ^= s->x[2];
+    s->x[0] ^= s->x[4];
+    s->x[2] = ~s->x[2];
+    /* linear layer */
+    s->x[0] ^=
+        (s->x[0] >> 19) ^ (s->x[0] << 45) ^ (s->x[0] >> 28) ^ (s->x[0] << 36);
+    s->x[1] ^=
+        (s->x[1] >> 61) ^ (s->x[1] << 3) ^ (s->x[1] >> 39) ^ (s->x[1] << 25);
+    s->x[2] ^=
+        (s->x[2] >> 1) ^ (s->x[2] << 63) ^ (s->x[2] >> 6) ^ (s->x[2] << 58);
+    s->x[3] ^=
+        (s->x[3] >> 10) ^ (s->x[3] << 54) ^ (s->x[3] >> 17) ^ (s->x[3] << 47);
+    s->x[4] ^=
+        (s->x[4] >> 7) ^ (s->x[4] << 57) ^ (s->x[4] >> 41) ^ (s->x[4] << 23);
+}
+
+/* ---------------------------------------------------------------- */
+
+#define RC(i) (i)
+#define START(n) ((3 + (n)) << 4 | (12 - (n)))
+#define INC -0x0f
+#define END 0x3c
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    int i = START(nr);
+    do
+    {
+        ROUND(s, RC(i));
+        i += INC;
+    } while (i != END);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/crypto_aead.c

+../opt_32/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/forceinline.h

+../opt_32/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_32_tiny/isap.h

+../opt_32/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_64/api.h

 #ifndef API_H
 #define API_H
 
-#define CRYPTO_VERSION "2.0.1"
+// isapa128a
 #define CRYPTO_KEYBYTES 16
 #define CRYPTO_NSECBYTES 0
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
+
+// asconhashv12
 #define CRYPTO_BYTES 32
+#define ASCON_HASH_OUTLEN 32
+#define ASCON_HASH_ROUNDS 12
 
 #endif
-

isap/Implementations/crypto_aead/isapa128av20/opt_64/asconp.h

-typedef unsigned char u8;
-typedef unsigned long u32;
-typedef unsigned long long u64;
-
-#define ASCON_128_RATE 8
-#define ASCON_128_PA_ROUNDS 12
-#define ASCON_128_STATE_SZ 40
-
-#define ASCON_HASH_IV                   \
-  (((u64)(ASCON_128_RATE * 8) << 48) |  \
-   ((u64)(ASCON_128_PA_ROUNDS) << 40) | \
-   ((u64)(CRYPTO_BYTES * 8) << 0))
-
-#define ROTR(x,n) (((x)>>(n))|((x)<<(64-(n))))
-#define EXT_BYTE(x,n) ((u8)((u64)(x)>>(8*(7-(n)))))
-#define INS_BYTE(x,n) ((u64)(x)<<(8*(7-(n))))
-
-#define U64BIG(x) \
-    ((ROTR(x, 8) & (0xFF000000FF000000ULL)) | \
-     (ROTR(x,24) & (0x00FF000000FF0000ULL)) | \
-     (ROTR(x,40) & (0x0000FF000000FF00ULL)) | \
-     (ROTR(x,56) & (0x000000FF000000FFULL)))
-
-#define ROUND(C) ({\
-    x2 ^= C;\
-    x0 ^= x4;\
-    x4 ^= x3;\
-    x2 ^= x1;\
-    t0 = x0;\
-    t4 = x4;\
-    t3 = x3;\
-    t1 = x1;\
-    t2 = x2;\
-    x0 = t0 ^ ((~t1) & t2);\
-    x2 = t2 ^ ((~t3) & t4);\
-    x4 = t4 ^ ((~t0) & t1);\
-    x1 = t1 ^ ((~t2) & t3);\
-    x3 = t3 ^ ((~t4) & t0);\
-    x1 ^= x0;\
-    t1  = x1;\
-    x1 = ROTR(x1, R[1][0]);\
-    x3 ^= x2;\
-    t2  = x2;\
-    x2 = ROTR(x2, R[2][0]);\
-    t4  = x4;\
-    t2 ^= x2;\
-    x2 = ROTR(x2, R[2][1] - R[2][0]);\
-    t3  = x3;\
-    t1 ^= x1;\
-    x3 = ROTR(x3, R[3][0]);\
-    x0 ^= x4;\
-    x4 = ROTR(x4, R[4][0]);\
-    t3 ^= x3;\
-    x2 ^= t2;\
-    x1 = ROTR(x1, R[1][1] - R[1][0]);\
-    t0  = x0;\
-    x2 = ~x2;\
-    x3 = ROTR(x3, R[3][1] - R[3][0]);\
-    t4 ^= x4;\
-    x4 = ROTR(x4, R[4][1] - R[4][0]);\
-    x3 ^= t3;\
-    x1 ^= t1;\
-    x0 = ROTR(x0, R[0][0]);\
-    x4 ^= t4;\
-    t0 ^= x0;\
-    x0 = ROTR(x0, R[0][1] - R[0][0]);\
-    x0 ^= t0;\
-})
-
-#define P12 ({\
-    ROUND(0xf0);\
-    ROUND(0xe1);\
-    ROUND(0xd2);\
-    ROUND(0xc3);\
-    ROUND(0xb4);\
-    ROUND(0xa5);\
-    ROUND(0x96);\
-    ROUND(0x87);\
-    ROUND(0x78);\
-    ROUND(0x69);\
-    ROUND(0x5a);\
-    ROUND(0x4b);\
-})
-
-#define P6 ({\
-    ROUND(0x96);\
-    ROUND(0x87);\
-    ROUND(0x78);\
-    ROUND(0x69);\
-    ROUND(0x5a);\
-    ROUND(0x4b);\
-})
-
-#define P1 ({\
-    ROUND(0x4b);\
-})
-
-static const int R[5][2] = {
-    {19, 28}, {39, 61}, {1, 6}, {10, 17}, {7, 41}
-};
+#ifndef ASCONP_H_
+#define ASCONP_H_
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH P12ROUNDS(s)
+#define P_sB P1ROUNDS(s)
+#define P_sE P6ROUNDS(s)
+#define P_sK P12ROUNDS(s)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+forceinline lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint64_t ROR(uint64_t x, int n) { return x >> n | x << (-n & 63); }
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint8_t C)
+{
+    state_t t;
+    /* round constant */
+    s->x[2] ^= C;
+    /* s-box layer */
+    s->x[0] ^= s->x[4];
+    s->x[4] ^= s->x[3];
+    s->x[2] ^= s->x[1];
+    t.x[0] = s->x[0] ^ (~s->x[1] & s->x[2]);
+    t.x[2] = s->x[2] ^ (~s->x[3] & s->x[4]);
+    t.x[4] = s->x[4] ^ (~s->x[0] & s->x[1]);
+    t.x[1] = s->x[1] ^ (~s->x[2] & s->x[3]);
+    t.x[3] = s->x[3] ^ (~s->x[4] & s->x[0]);
+    t.x[1] ^= t.x[0];
+    t.x[3] ^= t.x[2];
+    t.x[0] ^= t.x[4];
+    /* linear layer */
+    s->x[2] = t.x[2] ^ ROR(t.x[2], 6 - 1);
+    s->x[3] = t.x[3] ^ ROR(t.x[3], 17 - 10);
+    s->x[4] = t.x[4] ^ ROR(t.x[4], 41 - 7);
+    s->x[0] = t.x[0] ^ ROR(t.x[0], 28 - 19);
+    s->x[1] = t.x[1] ^ ROR(t.x[1], 61 - 39);
+    s->x[2] = t.x[2] ^ ROR(s->x[2], 1);
+    s->x[3] = t.x[3] ^ ROR(s->x[3], 10);
+    s->x[4] = t.x[4] ^ ROR(s->x[4], 7);
+    s->x[0] = t.x[0] ^ ROR(s->x[0], 19);
+    s->x[1] = t.x[1] ^ ROR(s->x[1], 39);
+    s->x[2] = ~s->x[2];
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P12ROUNDS(state_t *s)
+{
+    ROUND(s, 0xf0);
+    ROUND(s, 0xe1);
+    ROUND(s, 0xd2);
+    ROUND(s, 0xc3);
+    ROUND(s, 0xb4);
+    ROUND(s, 0xa5);
+    ROUND(s, 0x96);
+    ROUND(s, 0x87);
+    ROUND(s, 0x78);
+    ROUND(s, 0x69);
+    ROUND(s, 0x5a);
+    ROUND(s, 0x4b);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P6ROUNDS(state_t *s)
+{
+    ROUND(s, 0x96);
+    ROUND(s, 0x87);
+    ROUND(s, 0x78);
+    ROUND(s, 0x69);
+    ROUND(s, 0x5a);
+    ROUND(s, 0x4b);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void P1ROUNDS(state_t *s)
+{
+    ROUND(s, 0x4b);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_64/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_64/forceinline.h

+#ifndef FORCEINLINE_H_
+#define FORCEINLINE_H_
+
+/* define forceinline macro */
+#ifdef _MSC_VER
+#define forceinline __forceinline
+#elif defined(__GNUC__)
+#define forceinline inline __attribute__((__always_inline__))
+#elif defined(__CLANG__)
+#if __has_attribute(__always_inline__)
+#define forceinline inline __attribute__((__always_inline__))
+#else
+#define forceinline inline
+#endif
+#else
+#define forceinline inline
+#endif
+
+#endif /* FORCEINLINE_H_ */

isap/Implementations/crypto_aead/isapa128av20/opt_64/isap.c

-#include <stdio.h>
 #include <string.h>
+#include <inttypes.h>
 #include "api.h"
 #include "isap.h"
 #include "asconp.h"
+#include "config.h"
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
 
-const u8 ISAP_IV1[] = {0x01,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
-const u8 ISAP_IV2[] = {0x02,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
-const u8 ISAP_IV3[] = {0x03,ISAP_K,ISAP_rH,ISAP_rB,ISAP_sH,ISAP_sB,ISAP_sE,ISAP_sK};
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
 
 /******************************************************************************/
-/*                                   IsapRk                                   */
+/*                                 ISAP_RK                                    */
 /******************************************************************************/
 
 void isap_rk(
-	const u8 *k,
-	const u8 *iv,
-	const u8 *y,
-	const u64 ylen,
-	u8 *out,
-	const u64 outlen
-){
-    const u64 *k64 = (u64 *)k;
-    const u64 *iv64 = (u64 *)iv;
-    u64 *out64 = (u64 *)out;
-    u64 x0, x1, x2, x3, x4;
-    u64 t0, t1, t2, t3, t4;
-
-    // Init state
-    t0 = t1 = t2 = t3 = t4 = 0;
-    x0 = U64BIG(k64[0]);
-    x1 = U64BIG(k64[1]);
-    x2 = U64BIG(iv64[0]);
-    x3 = x4 = 0;
-    P12;
-
-    // Absorb Y
-    for (size_t i = 0; i < ylen*8-1; i++){
-        size_t cur_byte_pos = i/8;
-        size_t cur_bit_pos = 7-(i%8);
-        u8 cur_bit = ((y[cur_byte_pos] >> (cur_bit_pos)) & 0x01) << 7;
-        x0 ^= ((u64)cur_bit) << 56;
-        P1;
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
     }
-    u8 cur_bit = ((y[ylen-1]) & 0x01) << 7;
-    x0 ^= ((u64)cur_bit) << 56;
-    P12;
-
-    // Extract K*
-    out64[0] = U64BIG(x0);
-    out64[1] = U64BIG(x1);
-    if(outlen == 24){
-        out64[2] = U64BIG(x2);
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
     }
 }
 
 /******************************************************************************/
-/*                                  IsapMac                                   */
+/*                                 ISAP_MAC                                   */
 /******************************************************************************/
 
 void isap_mac(
-    const u8 *k,
-    const u8 *npub,
-    const u8 *ad, u64 adlen,
-    const u8 *c, u64 clen,
-    u8 *tag
-){
-    u8 state[ISAP_STATE_SZ];
-    const u64 *npub64 = (u64 *)npub;
-    u64 *state64 = (u64 *)state;
-    u64 x0, x1, x2, x3, x4;
-    u64 t0, t1, t2, t3, t4;
-    t0 = t1 = t2 = t3 = t4 = 0;
-
-    // Init state
-    x0 = U64BIG(npub64[0]);
-    x1 = U64BIG(npub64[1]);
-    x2 = U64BIG(((u64 *)ISAP_IV1)[0]);
-    x3 = x4 = 0;
-    P12;
-
-    /* Absorb ad */
-    u64 *ad64 = (u64*)ad;
-    while(adlen >= ISAP_rH_SZ){
-        x0 ^= U64BIG(*ad64);
-        P12;
-        ad64++;
-        adlen -= ISAP_rH_SZ;
-    }
-
-    /* Absorb final ad block */
-    u8 *xo = (u8*)&x0;
-    xo[ISAP_rH_SZ-1-adlen] ^= 0x80;
-    while(adlen > 0) {
-        xo[ISAP_rH_SZ-adlen] ^= ((u8*)ad64)[adlen-1];
-        adlen--;
-    }
-    P12;
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
 
     // Domain seperation
-    x4 ^= 0x0000000000000001ULL;
-
-    /* Absorb c */
-    u64 *c64 = (u64*)c;
-    while(clen >= ISAP_rH_SZ){
-        x0 ^= U64BIG(*c64);
-        P12;
-        c64++;
-        clen -= ISAP_rH_SZ;
-    }
+    s->w[4][0] ^= 0x1UL;
 
-    /* Absorb final c block */
-    xo[ISAP_rH_SZ-1-clen] ^= 0x80;
-    while(clen > 0) {
-        xo[ISAP_rH_SZ-clen] ^= ((u8*)c64)[clen-1];
-        clen--;
-    }
-    P12;
-
-    // Derive K*
-    state64[0] = U64BIG(x0);
-    state64[1] = U64BIG(x1);
-    state64[2] = U64BIG(x2);
-    state64[3] = U64BIG(x3);
-    state64[4] = U64BIG(x4);
-    isap_rk(k,ISAP_IV2,(u8 *)state64,CRYPTO_KEYBYTES,(u8 *)state64,CRYPTO_KEYBYTES);
-    x0 = U64BIG(state64[0]);
-    x1 = U64BIG(state64[1]);
-    x2 = U64BIG(state64[2]);
-    x3 = U64BIG(state64[3]);
-    x4 = U64BIG(state64[4]);
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
 
     // Squeeze tag
-    P12;
-    unsigned long long *tag64 = (u64 *)tag;
-    tag64[0] = U64BIG(x0);
-    tag64[1] = U64BIG(x1);
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
 }
 
 /******************************************************************************/
-/*                                  IsapEnc                                   */
+/*                                 ISAP_ENC                                   */
 /******************************************************************************/
 
 void isap_enc(
-	const u8 *k,
-	const u8 *npub,
-	const u8 *m,
-    u64 mlen,
-	u8 *c
-){
-    u8 state[ISAP_STATE_SZ];
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
 
     // Init state
-    u64 *state64 = (u64 *)state;
-    u64 *npub64 = (u64 *)npub;
-    isap_rk(k,ISAP_IV3,npub,CRYPTO_NPUBBYTES,state,ISAP_STATE_SZ-CRYPTO_NPUBBYTES);
-    u64 x0, x1, x2, x3, x4;
-    u64 t0, t1, t2, t3, t4;
-    t0 = t1 = t2 = t3 = t4 = 0;
-    x0 = U64BIG(state64[0]);
-    x1 = U64BIG(state64[1]);
-    x2 = U64BIG(state64[2]);
-    x3 = U64BIG(npub64[0]);
-    x4 = U64BIG(npub64[1]);
-    P6;
-
-    /* Encrypt m */
-    u64 *m64 = (u64 *)m;
-    u64 *c64 = (u64 *)c;
-    while(mlen >= ISAP_rH_SZ){
-        *c64 = U64BIG(x0) ^ *m64;
-        P6;
-        m64++;
-        c64++;
-        mlen -= ISAP_rH_SZ;
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
     }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
 
-    /* Encrypt final m block */
-    u8 *xo = (u8*)&x0;
-    while(mlen > 0) {
-        ((u8*)c64)[mlen-1] = xo[ISAP_rH_SZ-mlen] ^ ((u8*)m64)[mlen-1];
-        mlen--;
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
     }
+
+    return 0;
 }
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_64/isap.h

-#ifndef ISAP_H
-#define ISAP_H
+#ifndef ISAP_H_
+#define ISAP_H_
+
+#include <inttypes.h>
 
 // Rate in bits
 #define ISAP_rH 64
@@ -15,7 +17,7 @@
 #define ISAP_STATE_SZ 40
 
 // Size of rate in bytes
-#define ISAP_rH_SZ ((ISAP_rH+7)/8)
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
 
 // Size of zero truncated IV in bytes
 #define ISAP_IV_SZ 8
@@ -27,27 +29,16 @@
 #define ISAP_K 128
 
 void isap_mac(
-	const unsigned char *k,
-	const unsigned char *npub,
-	const unsigned char *ad, unsigned long long adlen,
-	const unsigned char *c, unsigned long long clen,
-	unsigned char *tag
-);
-
-void isap_rk(
-	const unsigned char *k,
-	const unsigned char *iv,
-	const unsigned char *in,
-	const unsigned long long inlen,
-	unsigned char *out,
-	const unsigned long long outlen
-);
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
 
 void isap_enc(
-	const unsigned char *k,
-	const unsigned char *npub,
-	const unsigned char *m, unsigned long long mlen,
-	unsigned char *c
-);
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
 
-#endif
+#endif // ISAP_H_

isap/Implementations/crypto_aead/isapa128av20/opt_8/api.h

+#ifndef API_H
+#define API_H
+
+// isapa128a
+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+
+// asconhashv12
+#define CRYPTO_BYTES 32
+#define ASCON_HASH_OUTLEN 32
+#define ASCON_HASH_ROUNDS 12
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_8/asconp.h

+#ifndef ASCONP_H
+#define ASCONP_H
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+#define XMUL(i, x)                                   \
+    do                                               \
+    {                                                \
+        tmp = (uint16_t)a.b[i] * (1 << (x));         \
+        b.b[(byte_rol + (i)) & 0x7] ^= (uint8_t)tmp; \
+        b.b[(byte_rol + (i) + 1) & 0x7] ^= tmp >> 8; \
+    } while (0)
+
+forceinline uint64_t ROR(uint64_t x, int n)
+{
+    lane_t a = {.x = x}, b = {.x = 0ull};
+    int bit_rol = (64 - n) & 0x7;
+    int byte_rol = (64 - n) >> 3;
+    uint16_t tmp;
+    XMUL(0, bit_rol);
+    XMUL(1, bit_rol);
+    XMUL(2, bit_rol);
+    XMUL(3, bit_rol);
+    XMUL(4, bit_rol);
+    XMUL(5, bit_rol);
+    XMUL(6, bit_rol);
+    XMUL(7, bit_rol);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint8_t NOT8(uint8_t a) { return ~a; }
+
+forceinline uint8_t XOR8(uint8_t a, uint8_t b) { return a ^ b; }
+
+forceinline uint8_t AND8(uint8_t a, uint8_t b) { return a & b; }
+
+forceinline uint8_t OR8(uint8_t a, uint8_t b) { return a | b; }
+
+/* ---------------------------------------------------------------- */
+
+forceinline void LINEAR_LAYER(state_t *s, uint64_t xtemp)
+{
+    uint64_t temp;
+    temp = s->x[2] ^ ROR(s->x[2], 28 - 19);
+    s->x[0] = s->x[2] ^ ROR(temp, 19);
+    temp = s->x[4] ^ ROR(s->x[4], 6 - 1);
+    s->x[2] = s->x[4] ^ ROR(temp, 1);
+    temp = s->x[1] ^ ROR(s->x[1], 41 - 7);
+    s->x[4] = s->x[1] ^ ROR(temp, 7);
+    temp = s->x[3] ^ ROR(s->x[3], 61 - 39);
+    s->x[1] = s->x[3] ^ ROR(temp, 39);
+    temp = xtemp ^ ROR(xtemp, 17 - 10);
+    s->x[3] = xtemp ^ ROR(temp, 10);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void NONLINEAR_LAYER(state_t *s, lane_t *xtemp, uint8_t pos)
+{
+    uint8_t t0;
+    uint8_t t1;
+    uint8_t t2;
+    // Based on the round description of Ascon given in the Bachelor's thesis:
+    //"Optimizing Ascon on RISC-V" of Lars Jellema
+    // see https://github.com/Lucus16/ascon-riscv/
+    t0 = XOR8(s->b[1][pos], s->b[2][pos]);
+    t1 = XOR8(s->b[0][pos], s->b[4][pos]);
+    t2 = XOR8(s->b[3][pos], s->b[4][pos]);
+    s->b[4][pos] = OR8(s->b[3][pos], NOT8(s->b[4][pos]));
+    s->b[4][pos] = XOR8(s->b[4][pos], t0);
+    s->b[3][pos] = XOR8(s->b[3][pos], s->b[1][pos]);
+    s->b[3][pos] = OR8(s->b[3][pos], t0);
+    s->b[3][pos] = XOR8(s->b[3][pos], t1);
+    s->b[2][pos] = XOR8(s->b[2][pos], t1);
+    s->b[2][pos] = OR8(s->b[2][pos], s->b[1][pos]);
+    s->b[2][pos] = XOR8(s->b[2][pos], t2);
+    s->b[1][pos] = AND8(s->b[1][pos], NOT8(t1));
+    s->b[1][pos] = XOR8(s->b[1][pos], t2);
+    s->b[0][pos] = OR8(s->b[0][pos], t2);
+    (*xtemp).b[pos] = XOR8(s->b[0][pos], t0);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint8_t C)
+{
+    lane_t xtemp;
+    /* round constant */
+    s->b[2][0] = XOR8(s->b[2][0], C);
+    /* s-box layer */
+    for (uint8_t i = 0; i < 8; i++)
+        NONLINEAR_LAYER(s, &xtemp, i);
+    /* linear layer */
+    LINEAR_LAYER(s, xtemp.x);
+}
+
+/* ---------------------------------------------------------------- */
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    switch (nr)
+    {
+    case 12:
+        ROUND(s, 0xf0);
+        ROUND(s, 0xe1);
+        ROUND(s, 0xd2);
+        ROUND(s, 0xc3);
+        ROUND(s, 0xb4);
+        ROUND(s, 0xa5);
+    case 6:
+        ROUND(s, 0x96);
+        ROUND(s, 0x87);
+        ROUND(s, 0x78);
+        ROUND(s, 0x69);
+        ROUND(s, 0x5a);
+    default:
+        ROUND(s, 0x4b);
+    }
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/opt_8/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_8/crypto_aead.c

+#include "api.h"
+#include "isap.h"
+#include "crypto_aead.h"
+
+int crypto_aead_encrypt(
+	unsigned char *c, unsigned long long *clen,
+	const unsigned char *m, unsigned long long mlen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *nsec,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Ciphertext length is mlen + tag length
+	*clen = mlen+ISAP_TAG_SZ;
+
+	// Encrypt plaintext
+	if (mlen > 0) {
+		isap_enc(k,npub,m,mlen,c);
+	}
+
+	// Generate tag
+	unsigned char *tag = c+mlen;
+	isap_mac(k,npub,ad,adlen,c,mlen,tag);
+	return 0;
+}
+
+int crypto_aead_decrypt(
+	unsigned char *m, unsigned long long *mlen,
+	unsigned char *nsec,
+	const unsigned char *c, unsigned long long clen,
+	const unsigned char *ad, unsigned long long adlen,
+	const unsigned char *npub,
+	const unsigned char *k
+){
+    (void)nsec;
+
+	// Plaintext length is clen - tag length
+	*mlen = clen-ISAP_TAG_SZ;
+
+	// Generate tag
+	unsigned char tag[ISAP_TAG_SZ];
+	isap_mac(k,npub,ad,adlen,c,*mlen,tag);
+
+	// Compare tag
+	unsigned long eq_cnt = 0;
+	for(unsigned int i = 0; i < ISAP_TAG_SZ; i++) {
+		eq_cnt += (tag[i] == c[(*mlen)+i]);
+	}
+
+	// Perform decryption if tag is correct
+	if(eq_cnt == (unsigned long)ISAP_TAG_SZ){
+		if (*mlen > 0) {
+			isap_enc(k,npub,c,*mlen,m);
+		}
+		return 0;
+	} else {
+		return -1;
+	}
+}

isap/Implementations/crypto_aead/isapa128av20/opt_8/forceinline.h

+#ifndef FORCEINLINE_H_
+#define FORCEINLINE_H_
+
+/* define forceinline macro */
+#ifdef _MSC_VER
+#define forceinline __forceinline
+#elif defined(__GNUC__)
+#define forceinline inline __attribute__((__always_inline__))
+#elif defined(__CLANG__)
+#if __has_attribute(__always_inline__)
+#define forceinline inline __attribute__((__always_inline__))
+#else
+#define forceinline inline
+#endif
+#else
+#define forceinline inline
+#endif
+
+#endif /* FORCEINLINE_H_ */

isap/Implementations/crypto_aead/isapa128av20/opt_8/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+forceinline void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_8/isap.h

+#ifndef ISAP_H
+#define ISAP_H
+
+#include <inttypes.h>
+
+// Rate in bits
+#define ISAP_rH 64
+#define ISAP_rB 1
+
+// Number of rounds
+#define ISAP_sH 12
+#define ISAP_sB 1
+#define ISAP_sE 6
+#define ISAP_sK 12
+
+// State size in bytes
+#define ISAP_STATE_SZ 40
+
+// Size of rate in bytes
+#define ISAP_rH_SZ ((ISAP_rH + 7) / 8)
+
+// Size of zero truncated IV in bytes
+#define ISAP_IV_SZ 8
+
+// Size of tag in bytes
+#define ISAP_TAG_SZ 16
+
+// Security level
+#define ISAP_K 128
+
+void isap_mac(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *ad, const uint64_t adlen,
+	const uint8_t *c, const uint64_t clen,
+	uint8_t *tag);
+
+void isap_enc(
+	const uint8_t *k,
+	const uint8_t *npub,
+	const uint8_t *m, const uint64_t mlen,
+	uint8_t *c);
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/api.h

+../opt_8/api.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/asconp.h

+#ifndef ASCONP_H
+#define ASCONP_H
+
+#include <inttypes.h>
+#include "forceinline.h"
+
+typedef union
+{
+    uint64_t x;
+    uint32_t w[2];
+    uint8_t b[8];
+} lane_t;
+
+typedef union
+{
+    lane_t l[5];
+    uint64_t x[5];
+    uint32_t w[5][2];
+    uint8_t b[5][8];
+} state_t;
+
+/* ---------------------------------------------------------------- */
+
+#define P_sH PROUNDS(s, 12)
+#define P_sB PROUNDS(s, 1)
+#define P_sE PROUNDS(s, 6)
+#define P_sK PROUNDS(s, 12)
+
+/* ---------------------------------------------------------------- */
+
+#define U64TOWORD(x) U64BIG(x)
+#define WORDTOU64(x) U64BIG(x)
+
+/* ---------------------------------------------------------------- */
+
+#define TOBI(x) (x)
+#define FROMBI(x) (x)
+
+/* ---------------------------------------------------------------- */
+
+lane_t U64BIG(lane_t x)
+{
+    x.x = ((((x.x) & 0x00000000000000FFULL) << 56) | (((x.x) & 0x000000000000FF00ULL) << 40) |
+           (((x.x) & 0x0000000000FF0000ULL) << 24) | (((x.x) & 0x00000000FF000000ULL) << 8) |
+           (((x.x) & 0x000000FF00000000ULL) >> 8) | (((x.x) & 0x0000FF0000000000ULL) >> 24) |
+           (((x.x) & 0x00FF000000000000ULL) >> 40) | (((x.x) & 0xFF00000000000000ULL) >> 56));
+    return x;
+}
+
+/* ---------------------------------------------------------------- */
+
+#define XMUL(i, x)                                   \
+    do                                               \
+    {                                                \
+        tmp = (uint16_t)a.b[i] * (1 << (x));         \
+        b.b[(byte_rol + (i)) & 0x7] ^= (uint8_t)tmp; \
+        b.b[(byte_rol + (i) + 1) & 0x7] ^= tmp >> 8; \
+    } while (0)
+
+uint64_t ROR(uint64_t x, int n)
+{
+    lane_t a = {.x = x}, b = {.x = 0ull};
+    int bit_rol = (64 - n) & 0x7;
+    int byte_rol = (64 - n) >> 3;
+    uint16_t tmp;
+    XMUL(0, bit_rol);
+    XMUL(1, bit_rol);
+    XMUL(2, bit_rol);
+    XMUL(3, bit_rol);
+    XMUL(4, bit_rol);
+    XMUL(5, bit_rol);
+    XMUL(6, bit_rol);
+    XMUL(7, bit_rol);
+    return b.x;
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline uint8_t NOT8(uint8_t a) { return ~a; }
+
+forceinline uint8_t XOR8(uint8_t a, uint8_t b) { return a ^ b; }
+
+forceinline uint8_t AND8(uint8_t a, uint8_t b) { return a & b; }
+
+forceinline uint8_t OR8(uint8_t a, uint8_t b) { return a | b; }
+
+/* ---------------------------------------------------------------- */
+
+forceinline void LINEAR_LAYER(state_t *s, uint64_t xtemp)
+{
+    uint64_t temp;
+    temp = s->x[2] ^ ROR(s->x[2], 28 - 19);
+    s->x[0] = s->x[2] ^ ROR(temp, 19);
+    temp = s->x[4] ^ ROR(s->x[4], 6 - 1);
+    s->x[2] = s->x[4] ^ ROR(temp, 1);
+    temp = s->x[1] ^ ROR(s->x[1], 41 - 7);
+    s->x[4] = s->x[1] ^ ROR(temp, 7);
+    temp = s->x[3] ^ ROR(s->x[3], 61 - 39);
+    s->x[1] = s->x[3] ^ ROR(temp, 39);
+    temp = xtemp ^ ROR(xtemp, 17 - 10);
+    s->x[3] = xtemp ^ ROR(temp, 10);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void NONLINEAR_LAYER(state_t *s, lane_t *xtemp, uint8_t pos)
+{
+    uint8_t t0;
+    uint8_t t1;
+    uint8_t t2;
+    // Based on the round description of Ascon given in the Bachelor's thesis:
+    //"Optimizing Ascon on RISC-V" of Lars Jellema
+    // see https://github.com/Lucus16/ascon-riscv/
+    t0 = XOR8(s->b[1][pos], s->b[2][pos]);
+    t1 = XOR8(s->b[0][pos], s->b[4][pos]);
+    t2 = XOR8(s->b[3][pos], s->b[4][pos]);
+    s->b[4][pos] = OR8(s->b[3][pos], NOT8(s->b[4][pos]));
+    s->b[4][pos] = XOR8(s->b[4][pos], t0);
+    s->b[3][pos] = XOR8(s->b[3][pos], s->b[1][pos]);
+    s->b[3][pos] = OR8(s->b[3][pos], t0);
+    s->b[3][pos] = XOR8(s->b[3][pos], t1);
+    s->b[2][pos] = XOR8(s->b[2][pos], t1);
+    s->b[2][pos] = OR8(s->b[2][pos], s->b[1][pos]);
+    s->b[2][pos] = XOR8(s->b[2][pos], t2);
+    s->b[1][pos] = AND8(s->b[1][pos], NOT8(t1));
+    s->b[1][pos] = XOR8(s->b[1][pos], t2);
+    s->b[0][pos] = OR8(s->b[0][pos], t2);
+    (*xtemp).b[pos] = XOR8(s->b[0][pos], t0);
+}
+
+/* ---------------------------------------------------------------- */
+
+forceinline void ROUND(state_t *s, uint8_t C)
+{
+    lane_t xtemp;
+    /* round constant */
+    s->b[2][0] = XOR8(s->b[2][0], C);
+    /* s-box layer */
+    for (uint8_t i = 0; i < 8; i++)
+        NONLINEAR_LAYER(s, &xtemp, i);
+    /* linear layer */
+    LINEAR_LAYER(s, xtemp.x);
+}
+
+/* ---------------------------------------------------------------- */
+
+#define RC(i) (i)
+#define START(n) ((3 + (n)) << 4 | (12 - (n)))
+#define INC -0x0f
+#define END 0x3c
+
+void PROUNDS(state_t *s, uint8_t nr)
+{
+    int i = START(nr);
+    do
+    {
+        ROUND(s, RC(i));
+        i += INC;
+    } while (i != END);
+}
+
+/* ---------------------------------------------------------------- */
+
+#endif // ASCONP_H

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/config.h

+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define ENABLE_HASH 0
+
+#include "isap.h"
+
+// ISAP-A-128a
+const uint8_t ISAP_IV_A[] = {0x01, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KA[] = {0x02, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+const uint8_t ISAP_IV_KE[] = {0x03, ISAP_K, ISAP_rH, ISAP_rB, ISAP_sH, ISAP_sB, ISAP_sE, ISAP_sK};
+
+// Ascon-Hash
+const uint8_t ASCON_HASH_IV[] = {0x00, 0x40, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00};
+
+#endif // CONFIG_H

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/crypto_aead.c

+../opt_8/crypto_aead.c
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/forceinline.h

+../opt_8/forceinline.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/isap.c

+#include <string.h>
+#include <inttypes.h>
+#include "api.h"
+#include "isap.h"
+#include "asconp.h"
+#include "config.h"
+
+void ABSORB_LANES(state_t *s, const uint8_t *src, uint64_t len)
+{
+    while (len >= 8)
+    {
+        // Absorb full lanes
+        lane_t t0 = U64TOWORD(*(lane_t *)(src + 0));
+        s->x[0] ^= t0.x;
+        len -= ISAP_rH / 8;
+        src += ISAP_rH / 8;
+        P_sH;
+    }
+
+    if (len > 0)
+    {
+        // Absorb partial lane and padding
+        size_t i;
+        lane_t t0 = {0};
+        for (i = 0; i < len; i++)
+        {
+            t0.b[7 - i] ^= *src;
+            src++;
+        }
+        t0.b[7 - i] ^= 0x80;
+        t0 = TOBI(t0);
+        s->x[0] ^= t0.x;
+        P_sH;
+    }
+    else
+    {
+        // Absorb padded empty lane
+        s->b[0][7] ^= 0x80;
+        P_sH;
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_RK                                    */
+/******************************************************************************/
+
+void isap_rk(
+    const uint8_t *k,
+    const uint8_t *iv,
+    const uint8_t *y,
+    state_t *out,
+    const size_t outlen)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(k + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(k + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(iv + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sK;
+
+    // Absorb Y, bit by bit
+    for (size_t i = 0; i < 16; i++)
+    {
+        uint8_t y_byte = *y;
+        s->b[0][7] ^= (y_byte & 0x80) << 0;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x40) << 1;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x20) << 2;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x10) << 3;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x08) << 4;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x04) << 5;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x02) << 6;
+        P_sB;
+        s->b[0][7] ^= (y_byte & 0x01) << 7;
+        if (i != 15)
+        {
+            P_sB;
+            y += 1;
+        }
+    }
+
+    // Squeeze K*
+    P_sK;
+    out->x[0] = s->x[0];
+    out->x[1] = s->x[1];
+    if (outlen > 16)
+    {
+        out->x[2] = s->x[2];
+    }
+}
+
+/******************************************************************************/
+/*                                 ISAP_MAC                                   */
+/******************************************************************************/
+
+void isap_mac(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *ad, uint64_t adlen,
+    const uint8_t *c, uint64_t clen,
+    uint8_t *tag)
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[1] = U64TOWORD(*(lane_t *)(npub + 8));
+    s->l[2] = U64TOWORD(*(lane_t *)(ISAP_IV_A + 0));
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb associated data
+    ABSORB_LANES(s, ad, adlen);
+
+    // Domain seperation
+    s->w[4][0] ^= 0x1UL;
+
+    // Absorb ciphertext
+    ABSORB_LANES(s, c, clen);
+
+    // Derive KA*
+    s->l[0] = WORDTOU64(s->l[0]);
+    s->l[1] = WORDTOU64(s->l[1]);
+    isap_rk(k, ISAP_IV_KA, (const uint8_t *)(s->b), s, CRYPTO_KEYBYTES);
+
+    // Squeeze tag
+    P_sH;
+    lane_t t0 = WORDTOU64(s->l[0]);
+    memcpy(tag + 0, t0.b, 8);
+    t0 = WORDTOU64(s->l[1]);
+    memcpy(tag + 8, t0.b, 8);
+}
+
+/******************************************************************************/
+/*                                 ISAP_ENC                                   */
+/******************************************************************************/
+
+void isap_enc(
+    const uint8_t *k,
+    const uint8_t *npub,
+    const uint8_t *m, uint64_t mlen,
+    uint8_t *c)
+
+{
+    state_t state;
+    state_t *s = &state;
+
+    // Init state
+    isap_rk(k, ISAP_IV_KE, npub, s, ISAP_STATE_SZ - CRYPTO_NPUBBYTES);
+    s->l[3] = U64TOWORD(*(lane_t *)(npub + 0));
+    s->l[4] = U64TOWORD(*(lane_t *)(npub + 8));
+
+    while (mlen >= ISAP_rH / 8)
+    {
+        // Encrypt full lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)c = *(uint64_t *)m ^ t0.x;
+        mlen -= ISAP_rH / 8;
+        m += ISAP_rH / 8;
+        c += ISAP_rH / 8;
+    }
+
+    if (mlen > 0)
+    {
+        // Encrypt partial lanes
+        P_sE;
+        lane_t t0 = WORDTOU64(s->l[0]);
+        for (uint8_t i = 0; i < mlen; i++)
+        {
+            *c = *m ^ t0.b[i];
+            m += 1;
+            c += 1;
+        }
+    }
+}
+
+/******************************************************************************/
+/*                                Ascon-Hash                                  */
+/******************************************************************************/
+
+#if ENABLE_HASH == 1
+
+int crypto_hash(uint8_t *out, const uint8_t *in, unsigned long long inlen)
+{
+
+    state_t state;
+    state_t *s = &state;
+
+    // Initialize
+    s->l[0] = U64TOWORD(*(lane_t *)(ASCON_HASH_IV + 0));
+    s->x[1] = 0;
+    s->x[2] = 0;
+    s->x[3] = 0;
+    s->x[4] = 0;
+    P_sH;
+
+    // Absorb input
+    ABSORB_LANES(s, in, inlen);
+
+    for (size_t i = 0; i < 4; i++)
+    {
+        // Squeeze full lanes
+        lane_t t0 = WORDTOU64(s->l[0]);
+        *(uint64_t *)(out + 8 * i) = t0.x;
+        if (i < 3)
+        {
+            P_sH;
+        }
+    }
+
+    return 0;
+}
+
+#endif

isap/Implementations/crypto_aead/isapa128av20/opt_8_tiny/isap.h

+../opt_8/isap.h
\ No newline at end of file

isap/Implementations/crypto_aead/isapxv20/ref/.gitignore

+build/
+LWC_AEAD_KAT_128_128.txt