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Commit 857d3ac8 by Sebastian Renner Committed by Enrico Pozzobon
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rhys: gimli optimized for avr 

Co-authored-by: Rhys Weatherley <rhys.weatherley@gmail.com>
parent a2e3984b
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gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/aead-common.c 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "aead-common.h"
int aead_check_tag
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned size)
{
/* Set "accum" to -1 if the tags match, or 0 if they don't match */
int accum = 0;
while (size > 0) {
accum |= (*tag1++ ^ *tag2++);
--size;
}
accum = (accum - 1) >> 8;
/* Destroy the plaintext if the tag match failed */
while (plaintext_len > 0) {
*plaintext++ &= accum;
--plaintext_len;
}
/* If "accum" is 0, return -1, otherwise return 0 */
return ~accum;
}
int aead_check_tag_precheck
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned size, int precheck)
{
/* Set "accum" to -1 if the tags match, or 0 if they don't match */
int accum = 0;
while (size > 0) {
accum |= (*tag1++ ^ *tag2++);
--size;
}
accum = ((accum - 1) >> 8) & precheck;
/* Destroy the plaintext if the tag match failed */
while (plaintext_len > 0) {
*plaintext++ &= accum;
--plaintext_len;
}
/* If "accum" is 0, return -1, otherwise return 0 */
return ~accum;
}
gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/aead-common.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LWCRYPTO_AEAD_COMMON_H
#define LWCRYPTO_AEAD_COMMON_H
#include <stddef.h>
/**
* \file aead-common.h
* \brief Definitions that are common across AEAD schemes.
*
* AEAD stands for "Authenticated Encryption with Associated Data".
* It is a standard API pattern for securely encrypting and
* authenticating packets of data.
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Encrypts and authenticates a packet with an AEAD scheme.
*
* \param c Buffer to receive the output.
* \param clen On exit, set to the length of the output which includes
* the ciphertext and the authentication tag.
* \param m Buffer that contains the plaintext message to encrypt.
* \param mlen Length of the plaintext message in bytes.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param nsec Secret nonce - normally not used by AEAD schemes.
* \param npub Points to the public nonce for the packet.
* \param k Points to the key to use to encrypt the packet.
*
* \return 0 on success, or a negative value if there was an error in
* the parameters.
*/
typedef int (*aead_cipher_encrypt_t)
(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);
/**
* \brief Decrypts and authenticates a packet with an AEAD scheme.
*
* \param m Buffer to receive the plaintext message on output.
* \param mlen Receives the length of the plaintext message on output.
* \param nsec Secret nonce - normally not used by AEAD schemes.
* \param c Buffer that contains the ciphertext and authentication
* tag to decrypt.
* \param clen Length of the input data in bytes, which includes the
* ciphertext and the authentication tag.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param npub Points to the public nonce for the packet.
* \param k Points to the key to use to decrypt the packet.
*
* \return 0 on success, -1 if the authentication tag was incorrect,
* or some other negative number if there was an error in the parameters.
*/
typedef int (*aead_cipher_decrypt_t)
(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);
/**
* \brief Hashes a block of input data.
*
* \param out Buffer to receive the hash output.
* \param in Points to the input data to be hashed.
* \param inlen Length of the input data in bytes.
*
* \return Returns zero on success or -1 if there was an error in the
* parameters.
*/
typedef int (*aead_hash_t)
(unsigned char *out, const unsigned char *in, unsigned long long inlen);
/**
* \brief Initializes the state for a hashing operation.
*
* \param state Hash state to be initialized.
*/
typedef void (*aead_hash_init_t)(void *state);
/**
* \brief Updates a hash state with more input data.
*
* \param state Hash state to be updated.
* \param in Points to the input data to be incorporated into the state.
* \param inlen Length of the input data to be incorporated into the state.
*/
typedef void (*aead_hash_update_t)
(void *state, const unsigned char *in, unsigned long long inlen);
/**
* \brief Returns the final hash value from a hashing operation.
*
* \param Hash state to be finalized.
* \param out Points to the output buffer to receive the hash value.
*/
typedef void (*aead_hash_finalize_t)(void *state, unsigned char *out);
/**
* \brief Aborbs more input data into an XOF state.
*
* \param state XOF state to be updated.
* \param in Points to the input data to be absorbed into the state.
* \param inlen Length of the input data to be absorbed into the state.
*
* \sa ascon_xof_init(), ascon_xof_squeeze()
*/
typedef void (*aead_xof_absorb_t)
(void *state, const unsigned char *in, unsigned long long inlen);
/**
* \brief Squeezes output data from an XOF state.
*
* \param state XOF state to squeeze the output data from.
* \param out Points to the output buffer to receive the squeezed data.
* \param outlen Number of bytes of data to squeeze out of the state.
*/
typedef void (*aead_xof_squeeze_t)
(void *state, unsigned char *out, unsigned long long outlen);
/**
* \brief No special AEAD features.
*/
#define AEAD_FLAG_NONE 0x0000
/**
* \brief The natural byte order of the AEAD cipher is little-endian.
*
* If this flag is not present, then the natural byte order of the
* AEAD cipher should be assumed to be big-endian.
*
* The natural byte order may be useful when formatting packet sequence
* numbers as nonces. The application needs to know whether the sequence
* number should be packed into the leading or trailing bytes of the nonce.
*/
#define AEAD_FLAG_LITTLE_ENDIAN 0x0001
/**
* \brief Meta-information about an AEAD cipher.
*/
typedef struct
{
const char *name; /**< Name of the cipher */
unsigned key_len; /**< Length of the key in bytes */
unsigned nonce_len; /**< Length of the nonce in bytes */
unsigned tag_len; /**< Length of the tag in bytes */
unsigned flags; /**< Flags for extra features */
aead_cipher_encrypt_t encrypt; /**< AEAD encryption function */
aead_cipher_decrypt_t decrypt; /**< AEAD decryption function */
} aead_cipher_t;
/**
* \brief Meta-information about a hash algorithm that is related to an AEAD.
*
* Regular hash algorithms should provide the "hash", "init", "update",
* and "finalize" functions. Extensible Output Functions (XOF's) should
* proivde the "hash", "init", "absorb", and "squeeze" functions.
*/
typedef struct
{
const char *name; /**< Name of the hash algorithm */
size_t state_size; /**< Size of the incremental state structure */
unsigned hash_len; /**< Length of the hash in bytes */
unsigned flags; /**< Flags for extra features */
aead_hash_t hash; /**< All in one hashing function */
aead_hash_init_t init; /**< Incremental hash/XOF init function */
aead_hash_update_t update; /**< Incremental hash update function */
aead_hash_finalize_t finalize; /**< Incremental hash finalize function */
aead_xof_absorb_t absorb; /**< Incremental XOF absorb function */
aead_xof_squeeze_t squeeze; /**< Incremental XOF squeeze function */
} aead_hash_algorithm_t;
/**
* \brief Check an authentication tag in constant time.
*
* \param plaintext Points to the plaintext data.
* \param plaintext_len Length of the plaintext in bytes.
* \param tag1 First tag to compare.
* \param tag2 Second tag to compare.
* \param tag_len Length of the tags in bytes.
*
* \return Returns -1 if the tag check failed or 0 if the check succeeded.
*
* If the tag check fails, then the \a plaintext will also be zeroed to
* prevent it from being used accidentally by the application when the
* ciphertext was invalid.
*/
int aead_check_tag
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned tag_len);
/**
* \brief Check an authentication tag in constant time with a previous check.
*
* \param plaintext Points to the plaintext data.
* \param plaintext_len Length of the plaintext in bytes.
* \param tag1 First tag to compare.
* \param tag2 Second tag to compare.
* \param tag_len Length of the tags in bytes.
* \param precheck Set to -1 if previous check succeeded or 0 if it failed.
*
* \return Returns -1 if the tag check failed or 0 if the check succeeded.
*
* If the tag check fails, then the \a plaintext will also be zeroed to
* prevent it from being used accidentally by the application when the
* ciphertext was invalid.
*
* This version can be used to incorporate other information about the
* correctness of the plaintext into the final result.
*/
int aead_check_tag_precheck
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned tag_len, int precheck);
#ifdef __cplusplus
}
#endif
#endif
gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/api.h 0 → 100644
#define CRYPTO_KEYBYTES 32
#define CRYPTO_NSECBYTES 0
#define CRYPTO_NPUBBYTES 16
#define CRYPTO_ABYTES 16
#define CRYPTO_NOOVERLAP 1
gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/encrypt.c 0 → 100644
#include "gimli24.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)
{
return gimli24_aead_encrypt
(c, clen, m, mlen, ad, adlen, nsec, npub, k);
}
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)
{
return gimli24_aead_decrypt
(m, mlen, nsec, c, clen, ad, adlen, npub, k);
}
gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/gimli24.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LWCRYPTO_GIMLI24_H
#define LWCRYPTO_GIMLI24_H
#include "aead-common.h"
/**
* \file gimli24.h
* \brief Gimli authenticated encryption algorithm.
*
* GIMLI-24-CIPHER has a 256-bit key, a 128-bit nonce, and a 128-bit tag.
* It is the spiritual successor to the widely used ChaCha20 and has a
* similar design.
*
* This library also includes an implementation of the hash algorithm
* GIMLI-24-HASH in both regular hashing and XOF modes.
*
* References: https://gimli.cr.yp.to/
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Size of the key for GIMLI-24.
*/
#define GIMLI24_KEY_SIZE 32
/**
* \brief Size of the nonce for GIMLI-24.
*/
#define GIMLI24_NONCE_SIZE 16
/**
* \brief Size of the authentication tag for GIMLI-24.
*/
#define GIMLI24_TAG_SIZE 16
/**
* \brief Size of the hash output for GIMLI-24.
*/
#define GIMLI24_HASH_SIZE 32
/**
* \brief State information for GIMLI-24-HASH incremental modes.
*/
typedef union
{
struct {
unsigned char state[48]; /**< Current hash state */
unsigned char count; /**< Number of bytes in the current block */
unsigned char mode; /**< Hash mode: 0 for absorb, 1 for squeeze */
} s; /**< State */
unsigned long long align; /**< For alignment of this structure */
} gimli24_hash_state_t;
/**
* \brief Meta-information block for the GIMLI-24 cipher.
*/
extern aead_cipher_t const gimli24_cipher;
/**
* \brief Meta-information block for the GIMLI-24-HASH algorithm.
*
* This meta-information block can also be used in XOF mode.
*/
extern aead_hash_algorithm_t const gimli24_hash_algorithm;
/**
* \brief Encrypts and authenticates a packet with GIMLI-24 using the
* full AEAD mode.
*
* \param c Buffer to receive the output.
* \param clen On exit, set to the length of the output which includes
* the ciphertext and the 16 byte authentication tag.
* \param m Buffer that contains the plaintext message to encrypt.
* \param mlen Length of the plaintext message in bytes.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param nsec Secret nonce - not used by this algorithm.
* \param npub Points to the public nonce for the packet which must
* be 16 bytes in length.
* \param k Points to the 32 bytes of the key to use to encrypt the packet.
*
* \return 0 on success, or a negative value if there was an error in
* the parameters.
*
* \sa gimli24_aead_decrypt()
*/
int gimli24_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);
/**
* \brief Decrypts and authenticates a packet with GIMLI-24 using the
* full AEAD mode.
*
* \param m Buffer to receive the plaintext message on output.
* \param mlen Receives the length of the plaintext message on output.
* \param nsec Secret nonce - not used by this algorithm.
* \param c Buffer that contains the ciphertext and authentication
* tag to decrypt.
* \param clen Length of the input data in bytes, which includes the
* ciphertext and the 16 byte authentication tag.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param npub Points to the public nonce for the packet which must
* be 16 bytes in length.
* \param k Points to the 32 bytes of the key to use to decrypt the packet.
*
* \return 0 on success, -1 if the authentication tag was incorrect,
* or some other negative number if there was an error in the parameters.
*
* \sa gimli24_aead_encrypt()
*/
int gimli24_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);
/**
* \brief Hashes a block of input data with GIMLI-24 to generate a hash value.
*
* \param out Buffer to receive the hash output which must be at least
* GIMLI24_HASH_SIZE bytes in length.
* \param in Points to the input data to be hashed.
* \param inlen Length of the input data in bytes.
*
* \return Returns zero on success or -1 if there was an error in the
* parameters.
*/
int gimli24_hash
(unsigned char *out, const unsigned char *in, unsigned long long inlen);
/**
* \brief Initializes the state for a GIMLI-24-HASH hashing operation.
*
* \param state Hash state to be initialized.
*
* \sa gimli24_hash_absorb(), gimli24_hash_squeeze(), gimli24_hash()
*/
void gimli24_hash_init(gimli24_hash_state_t *state);
/**
* \brief Aborbs more input data into a GIMLI-24-HASH state.
*
* \param state Hash state to be updated.
* \param in Points to the input data to be absorbed into the state.
* \param inlen Length of the input data to be absorbed into the state.
*
* \sa gimli24_hash_init(), gimli24_hash_squeeze()
*/
void gimli24_hash_absorb
(gimli24_hash_state_t *state, const unsigned char *in,
unsigned long long inlen);
/**
* \brief Squeezes output data from an GIMLI-24-HASH state.
*
* \param state Hash state to squeeze the output data from.
* \param out Points to the output buffer to receive the squeezed data.
* \param outlen Number of bytes of data to squeeze out of the state.
*
* \sa gimli24_hash_init(), gimli24_hash_absorb()
*/
void gimli24_hash_squeeze
(gimli24_hash_state_t *state, unsigned char *out,
unsigned long long outlen);
/**
* \brief Returns the final hash value from a GIMLI-24-HASH hashing operation.
*
* \param state Hash state to be finalized.
* \param out Points to the output buffer to receive the hash value.
*
* \note This is a wrapper around gimli24_hash_squeeze() for a fixed length
* of GIMLI24_HASH_SIZE bytes.
*
* \sa gimli24_hash_init(), gimli24_hash_absorb()
*/
void gimli24_hash_finalize
(gimli24_hash_state_t *state, unsigned char *out);
#ifdef __cplusplus
}
#endif
#endif
gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/internal-gimli24-avr.S 0 → 100644
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gimli/Implementations/crypto_aead/gimli24v1/rhys-avr/internal-gimli24.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LW_INTERNAL_GIMLI24_H
#define LW_INTERNAL_GIMLI24_H
#include "internal-util.h"
/**
* \file internal-gimli24.h
* \brief Internal implementation of the GIMLI-24 permutation.
*
* References: https://gimli.cr.yp.to/
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Permutes the GIMLI-24 state.
*
* \param state The GIMLI-24 state to be permuted.
*
* The input and output \a state will be in little-endian byte order.
*/
void gimli24_permute(uint32_t state[12]);
#ifdef __cplusplus
}
#endif
#endif
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/aead-common.c 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "aead-common.h"
int aead_check_tag
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned size)
{
/* Set "accum" to -1 if the tags match, or 0 if they don't match */
int accum = 0;
while (size > 0) {
accum |= (*tag1++ ^ *tag2++);
--size;
}
accum = (accum - 1) >> 8;
/* Destroy the plaintext if the tag match failed */
while (plaintext_len > 0) {
*plaintext++ &= accum;
--plaintext_len;
}
/* If "accum" is 0, return -1, otherwise return 0 */
return ~accum;
}
int aead_check_tag_precheck
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned size, int precheck)
{
/* Set "accum" to -1 if the tags match, or 0 if they don't match */
int accum = 0;
while (size > 0) {
accum |= (*tag1++ ^ *tag2++);
--size;
}
accum = ((accum - 1) >> 8) & precheck;
/* Destroy the plaintext if the tag match failed */
while (plaintext_len > 0) {
*plaintext++ &= accum;
--plaintext_len;
}
/* If "accum" is 0, return -1, otherwise return 0 */
return ~accum;
}
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/aead-common.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LWCRYPTO_AEAD_COMMON_H
#define LWCRYPTO_AEAD_COMMON_H
#include <stddef.h>
/**
* \file aead-common.h
* \brief Definitions that are common across AEAD schemes.
*
* AEAD stands for "Authenticated Encryption with Associated Data".
* It is a standard API pattern for securely encrypting and
* authenticating packets of data.
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Encrypts and authenticates a packet with an AEAD scheme.
*
* \param c Buffer to receive the output.
* \param clen On exit, set to the length of the output which includes
* the ciphertext and the authentication tag.
* \param m Buffer that contains the plaintext message to encrypt.
* \param mlen Length of the plaintext message in bytes.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param nsec Secret nonce - normally not used by AEAD schemes.
* \param npub Points to the public nonce for the packet.
* \param k Points to the key to use to encrypt the packet.
*
* \return 0 on success, or a negative value if there was an error in
* the parameters.
*/
typedef int (*aead_cipher_encrypt_t)
(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);
/**
* \brief Decrypts and authenticates a packet with an AEAD scheme.
*
* \param m Buffer to receive the plaintext message on output.
* \param mlen Receives the length of the plaintext message on output.
* \param nsec Secret nonce - normally not used by AEAD schemes.
* \param c Buffer that contains the ciphertext and authentication
* tag to decrypt.
* \param clen Length of the input data in bytes, which includes the
* ciphertext and the authentication tag.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param npub Points to the public nonce for the packet.
* \param k Points to the key to use to decrypt the packet.
*
* \return 0 on success, -1 if the authentication tag was incorrect,
* or some other negative number if there was an error in the parameters.
*/
typedef int (*aead_cipher_decrypt_t)
(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);
/**
* \brief Hashes a block of input data.
*
* \param out Buffer to receive the hash output.
* \param in Points to the input data to be hashed.
* \param inlen Length of the input data in bytes.
*
* \return Returns zero on success or -1 if there was an error in the
* parameters.
*/
typedef int (*aead_hash_t)
(unsigned char *out, const unsigned char *in, unsigned long long inlen);
/**
* \brief Initializes the state for a hashing operation.
*
* \param state Hash state to be initialized.
*/
typedef void (*aead_hash_init_t)(void *state);
/**
* \brief Updates a hash state with more input data.
*
* \param state Hash state to be updated.
* \param in Points to the input data to be incorporated into the state.
* \param inlen Length of the input data to be incorporated into the state.
*/
typedef void (*aead_hash_update_t)
(void *state, const unsigned char *in, unsigned long long inlen);
/**
* \brief Returns the final hash value from a hashing operation.
*
* \param Hash state to be finalized.
* \param out Points to the output buffer to receive the hash value.
*/
typedef void (*aead_hash_finalize_t)(void *state, unsigned char *out);
/**
* \brief Aborbs more input data into an XOF state.
*
* \param state XOF state to be updated.
* \param in Points to the input data to be absorbed into the state.
* \param inlen Length of the input data to be absorbed into the state.
*
* \sa ascon_xof_init(), ascon_xof_squeeze()
*/
typedef void (*aead_xof_absorb_t)
(void *state, const unsigned char *in, unsigned long long inlen);
/**
* \brief Squeezes output data from an XOF state.
*
* \param state XOF state to squeeze the output data from.
* \param out Points to the output buffer to receive the squeezed data.
* \param outlen Number of bytes of data to squeeze out of the state.
*/
typedef void (*aead_xof_squeeze_t)
(void *state, unsigned char *out, unsigned long long outlen);
/**
* \brief No special AEAD features.
*/
#define AEAD_FLAG_NONE 0x0000
/**
* \brief The natural byte order of the AEAD cipher is little-endian.
*
* If this flag is not present, then the natural byte order of the
* AEAD cipher should be assumed to be big-endian.
*
* The natural byte order may be useful when formatting packet sequence
* numbers as nonces. The application needs to know whether the sequence
* number should be packed into the leading or trailing bytes of the nonce.
*/
#define AEAD_FLAG_LITTLE_ENDIAN 0x0001
/**
* \brief Meta-information about an AEAD cipher.
*/
typedef struct
{
const char *name; /**< Name of the cipher */
unsigned key_len; /**< Length of the key in bytes */
unsigned nonce_len; /**< Length of the nonce in bytes */
unsigned tag_len; /**< Length of the tag in bytes */
unsigned flags; /**< Flags for extra features */
aead_cipher_encrypt_t encrypt; /**< AEAD encryption function */
aead_cipher_decrypt_t decrypt; /**< AEAD decryption function */
} aead_cipher_t;
/**
* \brief Meta-information about a hash algorithm that is related to an AEAD.
*
* Regular hash algorithms should provide the "hash", "init", "update",
* and "finalize" functions. Extensible Output Functions (XOF's) should
* proivde the "hash", "init", "absorb", and "squeeze" functions.
*/
typedef struct
{
const char *name; /**< Name of the hash algorithm */
size_t state_size; /**< Size of the incremental state structure */
unsigned hash_len; /**< Length of the hash in bytes */
unsigned flags; /**< Flags for extra features */
aead_hash_t hash; /**< All in one hashing function */
aead_hash_init_t init; /**< Incremental hash/XOF init function */
aead_hash_update_t update; /**< Incremental hash update function */
aead_hash_finalize_t finalize; /**< Incremental hash finalize function */
aead_xof_absorb_t absorb; /**< Incremental XOF absorb function */
aead_xof_squeeze_t squeeze; /**< Incremental XOF squeeze function */
} aead_hash_algorithm_t;
/**
* \brief Check an authentication tag in constant time.
*
* \param plaintext Points to the plaintext data.
* \param plaintext_len Length of the plaintext in bytes.
* \param tag1 First tag to compare.
* \param tag2 Second tag to compare.
* \param tag_len Length of the tags in bytes.
*
* \return Returns -1 if the tag check failed or 0 if the check succeeded.
*
* If the tag check fails, then the \a plaintext will also be zeroed to
* prevent it from being used accidentally by the application when the
* ciphertext was invalid.
*/
int aead_check_tag
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned tag_len);
/**
* \brief Check an authentication tag in constant time with a previous check.
*
* \param plaintext Points to the plaintext data.
* \param plaintext_len Length of the plaintext in bytes.
* \param tag1 First tag to compare.
* \param tag2 Second tag to compare.
* \param tag_len Length of the tags in bytes.
* \param precheck Set to -1 if previous check succeeded or 0 if it failed.
*
* \return Returns -1 if the tag check failed or 0 if the check succeeded.
*
* If the tag check fails, then the \a plaintext will also be zeroed to
* prevent it from being used accidentally by the application when the
* ciphertext was invalid.
*
* This version can be used to incorporate other information about the
* correctness of the plaintext into the final result.
*/
int aead_check_tag_precheck
(unsigned char *plaintext, unsigned long long plaintext_len,
const unsigned char *tag1, const unsigned char *tag2,
unsigned tag_len, int precheck);
#ifdef __cplusplus
}
#endif
#endif
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/gimli24.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LWCRYPTO_GIMLI24_H
#define LWCRYPTO_GIMLI24_H
#include "aead-common.h"
/**
* \file gimli24.h
* \brief Gimli authenticated encryption algorithm.
*
* GIMLI-24-CIPHER has a 256-bit key, a 128-bit nonce, and a 128-bit tag.
* It is the spiritual successor to the widely used ChaCha20 and has a
* similar design.
*
* This library also includes an implementation of the hash algorithm
* GIMLI-24-HASH in both regular hashing and XOF modes.
*
* References: https://gimli.cr.yp.to/
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Size of the key for GIMLI-24.
*/
#define GIMLI24_KEY_SIZE 32
/**
* \brief Size of the nonce for GIMLI-24.
*/
#define GIMLI24_NONCE_SIZE 16
/**
* \brief Size of the authentication tag for GIMLI-24.
*/
#define GIMLI24_TAG_SIZE 16
/**
* \brief Size of the hash output for GIMLI-24.
*/
#define GIMLI24_HASH_SIZE 32
/**
* \brief State information for GIMLI-24-HASH incremental modes.
*/
typedef union
{
struct {
unsigned char state[48]; /**< Current hash state */
unsigned char count; /**< Number of bytes in the current block */
unsigned char mode; /**< Hash mode: 0 for absorb, 1 for squeeze */
} s; /**< State */
unsigned long long align; /**< For alignment of this structure */
} gimli24_hash_state_t;
/**
* \brief Meta-information block for the GIMLI-24 cipher.
*/
extern aead_cipher_t const gimli24_cipher;
/**
* \brief Meta-information block for the GIMLI-24-HASH algorithm.
*
* This meta-information block can also be used in XOF mode.
*/
extern aead_hash_algorithm_t const gimli24_hash_algorithm;
/**
* \brief Encrypts and authenticates a packet with GIMLI-24 using the
* full AEAD mode.
*
* \param c Buffer to receive the output.
* \param clen On exit, set to the length of the output which includes
* the ciphertext and the 16 byte authentication tag.
* \param m Buffer that contains the plaintext message to encrypt.
* \param mlen Length of the plaintext message in bytes.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param nsec Secret nonce - not used by this algorithm.
* \param npub Points to the public nonce for the packet which must
* be 16 bytes in length.
* \param k Points to the 32 bytes of the key to use to encrypt the packet.
*
* \return 0 on success, or a negative value if there was an error in
* the parameters.
*
* \sa gimli24_aead_decrypt()
*/
int gimli24_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);
/**
* \brief Decrypts and authenticates a packet with GIMLI-24 using the
* full AEAD mode.
*
* \param m Buffer to receive the plaintext message on output.
* \param mlen Receives the length of the plaintext message on output.
* \param nsec Secret nonce - not used by this algorithm.
* \param c Buffer that contains the ciphertext and authentication
* tag to decrypt.
* \param clen Length of the input data in bytes, which includes the
* ciphertext and the 16 byte authentication tag.
* \param ad Buffer that contains associated data to authenticate
* along with the packet but which does not need to be encrypted.
* \param adlen Length of the associated data in bytes.
* \param npub Points to the public nonce for the packet which must
* be 16 bytes in length.
* \param k Points to the 32 bytes of the key to use to decrypt the packet.
*
* \return 0 on success, -1 if the authentication tag was incorrect,
* or some other negative number if there was an error in the parameters.
*
* \sa gimli24_aead_encrypt()
*/
int gimli24_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);
/**
* \brief Hashes a block of input data with GIMLI-24 to generate a hash value.
*
* \param out Buffer to receive the hash output which must be at least
* GIMLI24_HASH_SIZE bytes in length.
* \param in Points to the input data to be hashed.
* \param inlen Length of the input data in bytes.
*
* \return Returns zero on success or -1 if there was an error in the
* parameters.
*/
int gimli24_hash
(unsigned char *out, const unsigned char *in, unsigned long long inlen);
/**
* \brief Initializes the state for a GIMLI-24-HASH hashing operation.
*
* \param state Hash state to be initialized.
*
* \sa gimli24_hash_absorb(), gimli24_hash_squeeze(), gimli24_hash()
*/
void gimli24_hash_init(gimli24_hash_state_t *state);
/**
* \brief Aborbs more input data into a GIMLI-24-HASH state.
*
* \param state Hash state to be updated.
* \param in Points to the input data to be absorbed into the state.
* \param inlen Length of the input data to be absorbed into the state.
*
* \sa gimli24_hash_init(), gimli24_hash_squeeze()
*/
void gimli24_hash_absorb
(gimli24_hash_state_t *state, const unsigned char *in,
unsigned long long inlen);
/**
* \brief Squeezes output data from an GIMLI-24-HASH state.
*
* \param state Hash state to squeeze the output data from.
* \param out Points to the output buffer to receive the squeezed data.
* \param outlen Number of bytes of data to squeeze out of the state.
*
* \sa gimli24_hash_init(), gimli24_hash_absorb()
*/
void gimli24_hash_squeeze
(gimli24_hash_state_t *state, unsigned char *out,
unsigned long long outlen);
/**
* \brief Returns the final hash value from a GIMLI-24-HASH hashing operation.
*
* \param state Hash state to be finalized.
* \param out Points to the output buffer to receive the hash value.
*
* \note This is a wrapper around gimli24_hash_squeeze() for a fixed length
* of GIMLI24_HASH_SIZE bytes.
*
* \sa gimli24_hash_init(), gimli24_hash_absorb()
*/
void gimli24_hash_finalize
(gimli24_hash_state_t *state, unsigned char *out);
#ifdef __cplusplus
}
#endif
#endif
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/hash.c 0 → 100644
#include "gimli24.h"
int crypto_hash
(unsigned char *out, const unsigned char *in, unsigned long long inlen)
{
return gimli24_hash(out, in, inlen);
}
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/internal-gimli24-avr.S 0 → 100644
This source diff could not be displayed because it is too large. You can view the blob instead.
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/internal-gimli24.c 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "internal-gimli24.h"
#if !defined(__AVR__)
/* Apply the SP-box to a specific column in the state array */
#define GIMLI24_SP(s0, s4, s8) \
do { \
x = leftRotate24(s0); \
y = leftRotate9(s4); \
s4 = y ^ x ^ ((x | s8) << 1); \
s0 = s8 ^ y ^ ((x & y) << 3); \
s8 = x ^ (s8 << 1) ^ ((y & s8) << 2); \
} while (0)
void gimli24_permute(uint32_t state[12])
{
uint32_t s0, s1, s2, s3, s4, s5;
uint32_t s6, s7, s8, s9, s10, s11;
uint32_t x, y;
unsigned round;
/* Load the state into local variables and convert from little-endian */
#if defined(LW_UTIL_LITTLE_ENDIAN)
s0 = state[0];
s1 = state[1];
s2 = state[2];
s3 = state[3];
s4 = state[4];
s5 = state[5];
s6 = state[6];
s7 = state[7];
s8 = state[8];
s9 = state[9];
s10 = state[10];
s11 = state[11];
#else
s0 = le_load_word32((const unsigned char *)(&(state[0])));
s1 = le_load_word32((const unsigned char *)(&(state[1])));
s2 = le_load_word32((const unsigned char *)(&(state[2])));
s3 = le_load_word32((const unsigned char *)(&(state[3])));
s4 = le_load_word32((const unsigned char *)(&(state[4])));
s5 = le_load_word32((const unsigned char *)(&(state[5])));
s6 = le_load_word32((const unsigned char *)(&(state[6])));
s7 = le_load_word32((const unsigned char *)(&(state[7])));
s8 = le_load_word32((const unsigned char *)(&(state[8])));
s9 = le_load_word32((const unsigned char *)(&(state[9])));
s10 = le_load_word32((const unsigned char *)(&(state[10])));
s11 = le_load_word32((const unsigned char *)(&(state[11])));
#endif
/* Unroll and perform the rounds 4 at a time */
for (round = 24; round > 0; round -= 4) {
/* Round 0: SP-box, small swap, add round constant */
GIMLI24_SP(s0, s4, s8);
GIMLI24_SP(s1, s5, s9);
GIMLI24_SP(s2, s6, s10);
GIMLI24_SP(s3, s7, s11);
x = s0;
y = s2;
s0 = s1 ^ 0x9e377900U ^ round;
s1 = x;
s2 = s3;
s3 = y;
/* Round 1: SP-box only */
GIMLI24_SP(s0, s4, s8);
GIMLI24_SP(s1, s5, s9);
GIMLI24_SP(s2, s6, s10);
GIMLI24_SP(s3, s7, s11);
/* Round 2: SP-box, big swap */
GIMLI24_SP(s0, s4, s8);
GIMLI24_SP(s1, s5, s9);
GIMLI24_SP(s2, s6, s10);
GIMLI24_SP(s3, s7, s11);
x = s0;
y = s1;
s0 = s2;
s1 = s3;
s2 = x;
s3 = y;
/* Round 3: SP-box only */
GIMLI24_SP(s0, s4, s8);
GIMLI24_SP(s1, s5, s9);
GIMLI24_SP(s2, s6, s10);
GIMLI24_SP(s3, s7, s11);
}
/* Convert state to little-endian if the platform is not little-endian */
#if defined(LW_UTIL_LITTLE_ENDIAN)
state[0] = s0;
state[1] = s1;
state[2] = s2;
state[3] = s3;
state[4] = s4;
state[5] = s5;
state[6] = s6;
state[7] = s7;
state[8] = s8;
state[9] = s9;
state[10] = s10;
state[11] = s11;
#else
le_store_word32(((unsigned char *)(&(state[0]))), s0);
le_store_word32(((unsigned char *)(&(state[1]))), s1);
le_store_word32(((unsigned char *)(&(state[2]))), s2);
le_store_word32(((unsigned char *)(&(state[3]))), s3);
le_store_word32(((unsigned char *)(&(state[4]))), s4);
le_store_word32(((unsigned char *)(&(state[5]))), s5);
le_store_word32(((unsigned char *)(&(state[6]))), s6);
le_store_word32(((unsigned char *)(&(state[7]))), s7);
le_store_word32(((unsigned char *)(&(state[8]))), s8);
le_store_word32(((unsigned char *)(&(state[9]))), s9);
le_store_word32(((unsigned char *)(&(state[10]))), s10);
le_store_word32(((unsigned char *)(&(state[11]))), s11);
#endif
}
#endif /* !__AVR__ */
gimli/Implementations/crypto_hash/gimli24v1/rhys-avr/internal-gimli24.h 0 → 100644
/*
* Copyright (C) 2020 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef LW_INTERNAL_GIMLI24_H
#define LW_INTERNAL_GIMLI24_H
#include "internal-util.h"
/**
* \file internal-gimli24.h
* \brief Internal implementation of the GIMLI-24 permutation.
*
* References: https://gimli.cr.yp.to/
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Permutes the GIMLI-24 state.
*
* \param state The GIMLI-24 state to be permuted.
*
* The input and output \a state will be in little-endian byte order.
*/
void gimli24_permute(uint32_t state[12]);
#ifdef __cplusplus
}
#endif
#endif
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