ascon

ascon/Implementations/.clang-format

+---
+Language:        Cpp
+# BasedOnStyle:  Google
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+AlwaysBreakTemplateDeclarations: Yes
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+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeBlocks:   Regroup
+IncludeCategories:
+  - Regex:           '^<ext/.*\.h>'
+    Priority:        2
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+RawStringFormats:
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+    Delimiters:
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+    CanonicalDelimiter: ''
+    BasedOnStyle:    google
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+    Delimiters:
+      - pb
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+      - PROTO
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+      - PARSE_TEST_PROTO
+      - PARSE_TEXT_PROTO
+      - ParseTextOrDie
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+

ascon/Implementations/CMakeLists.txt

+cmake_minimum_required(VERSION 3.6)
+project(ascon LANGUAGES C ASM)
+enable_testing()
+
+# set the default version, algorithms, implementations, tests, flags, defs
+set(DEFAULT_VERSIONS v12)
+set(DEFAULT_ALGS ascon128 ascon128a ascon80pq asconhash asconxof)
+set(DEFAULT_IMPLS ref opt64 opt64_lowsize bi32 bi32_lowsize bi32_lowreg bi16 bi8
+  opt64_2shares opt64_3shares bi32_2shares bi32_3shares)
+set(DEFAULT_TESTS genkat getcycles)
+set(DEFAULT_REL_FLAGS -std=c99 -O2 -fomit-frame-pointer -march=native -mtune=native)
+set(DEFAULT_DBG_FLAGS -std=c99 -O2 -Wall -Wextra -Wshadow)
+set(DEFAULT_COMPILE_DEFS -DASCON_DATA_ACCESS='H')
+
+# set cmake variables for version, algorithms, implementations, tests, flags, defs
+set(VERSION_LIST ${DEFAULT_VERSIONS} CACHE STRING "Choose the ascon versions to include.")
+set(ALG_LIST ${DEFAULT_ALGS} CACHE STRING "Choose the list of algorithms to include.")
+set(IMPL_LIST ${DEFAULT_IMPLS} CACHE STRING "Choose the list of implementations to include.")
+set(TEST_LIST ${DEFAULT_TESTS} CACHE STRING "Choose the list of tests to include.")
+set(REL_FLAGS ${DEFAULT_REL_FLAGS} CACHE STRING "Define custom Release (performance) flags.")
+set(DBG_FLAGS ${DEFAULT_DBG_FLAGS} CACHE STRING "Define custom Debug (NIST) flags.")
+set(COMPILE_DEFS ${DEFAULT_COMPILE_DEFS} CACHE STRING "Define custom compile definitions.")
+
+if(NOT WIN32 AND NOT CYGWIN AND NOT MSYS)
+  # use sanitizer in Debug build (but not on windows)
+  set(DBG_FLAGS ${DBG_FLAGS} -fsanitize=address,undefined -static-libasan)
+endif()
+if(MSVC)
+  set(DBG_FLAGS /Od)
+endif()
+
+# set the default build type for single-config generators if none was specified
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message(STATUS "Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING
+    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel." FORCE)
+endif()
+
+# add platform specific implementations
+message(STATUS "cmake host system name: ${CMAKE_HOST_SYSTEM_NAME}")
+message(STATUS "cmake host system processor: ${CMAKE_HOST_SYSTEM_PROCESSOR}")
+if(${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL x86_64 OR ${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL AMD64)
+  set(DEFAULT_IMPLS ${DEFAULT_IMPLS})
+elseif(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES ARM OR ${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES arm)
+  set(DEFAULT_IMPLS ${DEFAULT_IMPLS} bi32_arm neon)
+endif()
+
+set(KAT_PATH KAT)
+set(TEST_PATH tests)
+foreach(CRYPTO aead hash)
+  foreach(VER ${VERSION_LIST})
+    foreach(ALG ${ALG_LIST})
+      foreach(IMPL ${IMPL_LIST})
+        set(IMPL_PATH crypto_${CRYPTO}/${ALG}${VER}/${IMPL})
+        if(NOT EXISTS ${CMAKE_SOURCE_DIR}/${IMPL_PATH})
+          continue()
+        endif()
+        message("Adding implementation ${IMPL_PATH}")
+        string(REGEX REPLACE "/" "_" IMPL_NAME ${IMPL_PATH})
+        file(GLOB IMPL_FILES RELATIVE ${CMAKE_SOURCE_DIR} "${IMPL_PATH}/*.[ch]")
+        add_library(${IMPL_NAME} ${IMPL_FILES})
+        target_include_directories(${IMPL_NAME} PUBLIC ${IMPL_PATH} ${TEST_PATH})
+        target_compile_definitions(${IMPL_NAME} PRIVATE ${COMPILE_DEFS})
+        #target_compile_features(${IMPL_NAME} PUBLIC c_std_99) # cmake >= 3.8.2
+        target_compile_options(${IMPL_NAME} PUBLIC $<$<CONFIG:RELEASE>:${REL_FLAGS}>)
+        target_compile_options(${IMPL_NAME} PUBLIC $<$<CONFIG:DEBUG>:${DBG_FLAGS}>)
+        foreach(TEST_NAME ${TEST_LIST})
+          if(${TEST_NAME} STREQUAL genkat)
+            set(TEST_FILES ${TEST_PATH}/crypto_${CRYPTO}.h ${TEST_PATH}/${TEST_NAME}_${CRYPTO}.c)
+          else()
+            set(TEST_FILES ${TEST_PATH}/crypto_${CRYPTO}.h ${TEST_PATH}/${TEST_NAME}.c)
+          endif()
+          string(TOUPPER CRYPTO_${CRYPTO} CRYPTO_DEFINE)
+          set(EXE_NAME ${TEST_NAME}_${IMPL_NAME})
+          add_executable(${EXE_NAME} ${TEST_FILES})
+          target_compile_definitions(${EXE_NAME} PRIVATE ${CRYPTO_DEFINE})
+          target_link_libraries(${EXE_NAME} PRIVATE ${IMPL_NAME})
+          if(${TEST_NAME} STREQUAL genkat)
+            add_test(NAME ${EXE_NAME} COMMAND ${CMAKE_COMMAND}
+              -DEXE_NAME=${EXE_NAME} -DALG=${ALG}${VER}
+              -DSRC_DIR=${CMAKE_SOURCE_DIR} -DBIN_DIR=${CMAKE_BINARY_DIR}
+              -DCONFIG=$<CONFIGURATION> -P ${CMAKE_SOURCE_DIR}/genkat.cmake)
+          else()
+            add_test(${EXE_NAME} ${EXE_NAME})
+          endif()
+        endforeach()
+      endforeach()
+    endforeach()
+  endforeach()
+endforeach()
+

ascon/Implementations/LICENSE

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\ No newline at end of file

ascon/Implementations/README.md

+# Reference and optimized C and ASM implementations of Ascon
+
+Ascon is a family of lightweight authenticated encryption schemes with associated data (AEAD), including a hash and extendible output function (XOF).
+
+For more information on Ascon visit: https://ascon.iaik.tugraz.at/
+
+This repository contains the following 5 Ascon algorithms:
+
+- `crypto_aead/ascon128v12`: Ascon-128 v1.2
+- `crypto_aead/ascon128av12`: Ascon-128a v1.2
+- `crypto_aead/ascon80pqv12`: Ascon-80pq v1.2
+- `crypto_hash/asconhashv12`: Ascon-Hash v1.2
+- `crypto_hash/asconxofv12`: Ascon-Xof v1.2
+
+and the following implementations:
+
+- `ref`: reference implementation
+- `opt64`: 64-bit speed-optimized C implementation
+- `opt64_lowsize`: 64-bit size-optimized C implementation
+- `neon`: NEON speed-optimized ARM inline assembly implementation
+- `bi32`: 32-bit speed-optimized bit-interleaved C implementation
+- `bi32_lowsize`: 32-bit size-optimized bit-interleaved C implementation
+- `bi32_lowreg`: 32-bit speed-optimized bit-interleaved C implementation (low register usage)
+- `bi32_arm`: 32-bit speed-optimized bit-interleaved ARM inline assembly implementation
+- `bi16`: 16-bit optimized bit-interleaved C implementation
+- `bi8`: 8-bit optimized bit-interleaved C implementation
+
+
+## Performance results of Ascon-128 on different CPUs in cycles per byte:
+
+| Message Length in Bytes: |    1 |    8 |   16 |   32 |   64 | 1536 | long |
+|:-------------------------|-----:|-----:|-----:|-----:|-----:|-----:|-----:|
+| AMD Ryzen 7 1700\*       |      |      |      |      | 14.5 |  8.8 |  8.6 |
+| Intel Xeon E5-2609 v4\*  |      |      |      |      | 17.3 | 10.8 | 10.5 |
+| Cortex-A53 (ARMv8)\*     |      |      |      |      | 18.3 | 11.3 | 11.0 |
+| Intel Core i5-6300U      |  367 |   58 |   35 |   23 | 17.6 | 11.9 | 11.4 |
+| Intel Core i5-4200U      |  521 |   81 |   49 |   32 | 23.9 | 16.2 | 15.8 |
+| Cortex-A15 (ARMv7)\*     |      |      |      |      | 69.8 | 36.2 | 34.6 |
+| Cortex-A7 (NEON)         | 2182 |  249 |  148 |   97 | 71.7 | 47.5 | 46.5 |
+| Cortex-A7 (ARMv7)        | 1871 |  292 |  175 |  115 | 86.6 | 58.3 | 57.2 |
+| ARM1176JZF-S (ARMv6)     | 2189 |  340 |  202 |  133 | 97.9 | 64.4 | 65.3 |
+
+\* Results taken from eBACS: http://bench.cr.yp.to/
+
+
+## Performance results of Ascon-128a on different CPUs in cycles per byte:
+
+| Message Length in Bytes: |    1 |    8 |   16 |   32 |   64 | 1536 | long |
+|:-------------------------|-----:|-----:|-----:|-----:|-----:|-----:|-----:|
+| AMD Ryzen 7 1700\*       |      |      |      |      | 12.0 |  6.0 |  5.7 |
+| Intel Xeon E5-2609 v4\*  |      |      |      |      | 14.1 |  7.3 |  6.9 |
+| Cortex-A53 (ARMv8)\*     |      |      |      |      | 15.1 |  7.6 |  7.3 |
+| Intel Core i5-6300U      |  365 |   47 |   31 |   19 | 13.5 |  8.0 |  7.8 |
+| Intel Core i5-4200U      |  519 |   67 |   44 |   27 | 18.8 | 11.0 | 10.6 |
+| Cortex-A15 (ARMv7)\*     |      |      |      |      | 60.3 | 25.3 | 23.8 |
+| Cortex-A7 (NEON)         | 2204 |  226 |  132 |   82 | 55.9 | 31.7 | 30.7 |
+| Cortex-A7 (ARMv7)        | 1911 |  255 |  161 |  102 | 71.3 | 42.3 | 41.2 |
+| ARM1176JZF-S (ARMv6)     | 2267 |  303 |  191 |  120 | 84.4 | 50.0 | 50.2 |
+
+\* Results taken from eBACS: http://bench.cr.yp.to/
+
+
+## Implementation interface
+
+All implementations use the interface defined by the ECRYPT Benchmarking of Cryptographic Systems (eBACS):
+
+- https://bench.cr.yp.to/call-aead.html for CRYPTO\_AEAD (Ascon-128, Ascon-128a, Ascon-80pq)
+- https://bench.cr.yp.to/call-hash.html for CRYPTO\_HASH (Ascon-Hash) and XOF (Ascon-Xof)
+
+
+## Manually build and run a single Ascon target:
+
+Build example for CRYPTO\_AEAD algorithms: 
+
+```
+gcc -march=native -O3 -DNDEBUG -Icrypto_aead/ascon128v12/opt64 crypto_aead/ascon128v12/opt64/*.c -Itests tests/genkat_aead.c -o genkat
+gcc -march=native -O3 -DNDEBUG -Icrypto_aead/ascon128v12/opt64 crypto_aead/ascon128v12/opt64/*.c -DCRYPTO_AEAD -Itests tests/getcycles.c -o getcycles
+```
+
+Build example for CRYPTO\_HASH algorithms: 
+
+```
+gcc -march=native -O3 -DNDEBUG -Icrypto_hash/asconhashv12/opt64 crypto_hash/asconhashv12/opt64/*.c -Itests tests/genkat_hash.c -o genkat
+gcc -march=native -O3 -DNDEBUG -Icrypto_hash/asconhashv12/opt64 crypto_hash/asconhashv12/opt64/*.c -DCRYPTO_HASH -Itests tests/getcycles.c -o getcycles
+```
+
+Generate KATs and get CPU cycles:
+
+```
+./genkat
+./getcycles
+```
+
+
+## Build and test all Ascon v1.2 targets using performance flags:
+
+```
+mkdir build && cd build
+cmake .. -DCMAKE_BUILD_TYPE=Release
+cmake --build .
+ctest
+```
+
+
+## Build and test all Ascon v1.2 targets using NIST flags and sanitizers:
+
+```
+mkdir build && cd build
+cmake .. -DCMAKE_BUILD_TYPE=Debug
+cmake --build .
+ctest
+```
+
+
+## Build and run only specific algorithms, implementations and tests:
+
+Build and test:
+
+```
+mkdir build && cd build
+cmake .. -DVERSION_LIST="v12" -DALG_LIST="ascon128;asconhash" -DIMPL_LIST="opt64;bi32" -DTEST_LIST="genkat;getcycles"
+cmake --build .
+ctest -R genkat
+```
+
+Get CPU cycles:
+
+```
+./getcycles_crypto_aead_ascon128v12_opt64
+./getcycles_crypto_aead_ascon128v12_bi32
+./getcycles_crypto_hash_asconhashv12_opt64
+./getcycles_crypto_hash_asconhashv12_bi32
+```
+
+
+## Hints to get more reliable getcycles results on Intel/AMD CPUs:
+
+* Determine the processor base frequency (also called design frequency):
+  - e.g. using the Intel/AMD website
+  - or using `lscpu` listed under model name
+
+* Disable turbo boost (this should lock the frequency to the next value
+  below the processor base frequency):
+  ```
+  echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo
+  ```
+
+* If the above does not work, manually set the frequency using e.g. `cpufreq-set`.
+
+* Determine the actual frequency (under load):
+  - e.g. by watching the frequency using `lscpu` or `cpufreq-info`
+
+* Determine the scaling factor between the actual and base frequency:
+  - factor = actual frequency / base frequency
+
+* Run the getcycles program using the frequency factor and watch the results:
+  ```
+  while true; do ./getcycles_crypto_aead_ascon128v12_opt64 $factor; done
+  ```
+
+
+## Hints to activate the performance monitor unit (PMU) on ARM CPUs:
+
+* First try to install `linux-tools` and see if it works.
+
+* On many ARM platforms, the PMU has to be enabled using a kernel module:
+  - Source code for Armv6 (32-bit):
+    <http://sandsoftwaresound.net/raspberry-pi/raspberry-pi-gen-1/performance-counter-kernel-module/>
+  - Source code for Armv7 (32-bit):
+    <https://github.com/thoughtpolice/enable_arm_pmu>
+  - Source code for Armv8/Aarch64 (64-bit):
+    <https://github.com/rdolbeau/enable_arm_pmu>
+
+* Steps to compile the kernel module on the raspberry pi:
+  - Find out the kernel version using `uname -a`
+  - Download the kernel header files, e.g. `raspberrypi-kernel-header`
+  - Download the source code for the Armv6 kernel module
+  - Build, install and load the kernel module
+
+
+## Benchmark Ascon v1.2 using supercop
+
+Download supercop according to the website: http://bench.cr.yp.to/supercop.html
+
+To test only Ascon, just run the following commands:
+
+```
+./do-part init
+./do-part crypto_aead ascon128v12
+./do-part crypto_aead ascon128av12
+./do-part crypto_aead ascon80pqv12
+./do-part crypto_hash asconhashv12
+./do-part crypto_hash asconxofv12
+```

ascon/Implementations/benchmark.sh

+#!/bin/sh
+
+FACTOR=$1
+
+for i in getcycles*; do
+  echo
+  echo $i:
+  echo
+  echo "|     1 |     8 |    16 |    32 |    64 |  1536 |  long |"
+  echo "|------:|------:|------:|------:|------:|------:|------:|"
+  for n in $(seq 5); do
+    ./$i $FACTOR | tail -n 1
+  done | sort -n -k8 -t'|'
+done 2>/dev/null
+echo

ascon/Implementations/crypto_aead/ascon128av12/bi16/api.h

@@ -3,3 +3,4 @@
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
 #define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi16/endian.h

@@ -3,7 +3,10 @@
 
 
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 
 
-// macros for big endian machines
+/* macros for big endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for big endian machines")
+#endif
 #define U64BIG(x) (x)
 #define U64BIG(x) (x)
 #define U32BIG(x) (x)
 #define U32BIG(x) (x)
 #define U16BIG(x) (x)
 #define U16BIG(x) (x)
@@ -11,21 +14,26 @@
 #elif defined(_MSC_VER) || \
 #elif defined(_MSC_VER) || \
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
 
 
-// macros for little endian machines
+/* macros for little endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for little endian machines")
+#endif
 #define U64BIG(x)                          \
 #define U64BIG(x)                          \
-  ((((x) & 0x00000000000000FFULL) << 56) | (((x) & 0x000000000000FF00ULL) << 40) | \
-   (((x) & 0x0000000000FF0000ULL) << 24) | (((x) & 0x00000000FF000000ULL) << 8) |  \
-   (((x) & 0x000000FF00000000ULL) >> 8) | (((x) & 0x0000FF0000000000ULL) >> 24) |  \
-   (((x) & 0x00FF000000000000ULL) >> 40) | (((x) & 0xFF00000000000000ULL) >> 56))
+  (((0x00000000000000FFULL & (x)) << 56) | \
+   ((0x000000000000FF00ULL & (x)) << 40) | \
+   ((0x0000000000FF0000ULL & (x)) << 24) | \
+   ((0x00000000FF000000ULL & (x)) << 8) |  \
+   ((0x000000FF00000000ULL & (x)) >> 8) |  \
+   ((0x0000FF0000000000ULL & (x)) >> 24) | \
+   ((0x00FF000000000000ULL & (x)) >> 40) | \
+   ((0xFF00000000000000ULL & (x)) >> 56))
 #define U32BIG(x)                                           \
 #define U32BIG(x)                                           \
-  ((((x) & 0x000000FF) << 24) | (((x) & 0x0000FF00) << 8) | \
-   (((x) & 0x00FF0000) >> 8) | (((x) & 0xFF000000) >> 24))
-#define U16BIG(x)                                 \
-  ((((x) & 0x00FF) << 8) | (((x) & 0xFF00) >> 8))
+  (((0x000000FF & (x)) << 24) | ((0x0000FF00 & (x)) << 8) | \
+   ((0x00FF0000 & (x)) >> 8) | ((0xFF000000 & (x)) >> 24))
+#define U16BIG(x) (((0x00FF & (x)) << 8) | ((0xFF00 & (x)) >> 8))
 
 
 #else
 #else
-#error "ascon byte order macros not defined in endian.h"
+#error "Ascon byte order macros not defined in endian.h"
 #endif
 #endif
 
 
-#endif  // ENDIAN_H_
-
+#endif /* ENDIAN_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/api.h

@@ -3,3 +3,4 @@
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
 #define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi32/ascon.c

+#include "ascon.h"
+
+#include "api.h"
+#include "loadstore.h"
+#include "permutations.h"
+#include "printstate.h"
+
+__forceinline void loadkey(word_t* K0, word_t* K1, word_t* K2,
+                           const uint8_t* k) {
+  KINIT(K0, K1, K2);
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(*K0, KEYROT(WORD_T(0), LOAD(k, 4)));
+    k += 4;
+  }
+  XOR(*K1, LOAD64(k));
+  XOR(*K2, LOAD64(k + 8));
+}
+
+__forceinline void init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  word_t N0, N1;
+  word_t K0, K1, K2;
+  /* load nonce */
+  N0 = LOAD64(npub);
+  N1 = LOAD64(npub + 8);
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* initialization */
+  PINIT(s);
+  XOR(s->x0, IV);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x0, K0);
+  XOR(s->x1, K1);
+  XOR(s->x2, K2);
+  XOR(s->x3, N0);
+  XOR(s->x4, N1);
+  P12(s);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x2, K0);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("initialization", s);
+}
+
+__forceinline void absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  word_t* restrict px;
+  /* process associated data */
+  if (adlen) {
+    while (adlen >= ASCON_RATE) {
+      XOR(s->x0, LOAD64(ad));
+      if (ASCON_RATE == 16) XOR(s->x1, LOAD64(ad + 8));
+      PB(s);
+      ad += ASCON_RATE;
+      adlen -= ASCON_RATE;
+    }
+    /* final associated data block */
+    px = &s->x0;
+    if (ASCON_RATE == 16 && adlen >= 8) {
+      XOR(s->x0, LOAD64(ad));
+      px = &s->x1;
+      ad += 8;
+      adlen -= 8;
+    }
+    if (adlen) XOR(*px, LOAD(ad, adlen));
+    XOR(*px, PAD(adlen));
+    PB(s);
+  }
+  XOR(s->x4, WORD_T(1));
+  printstate("process associated data", s);
+}
+
+__forceinline void encrypt(state_t* s, uint8_t* c, const uint8_t* m,
+                           uint64_t mlen) {
+  word_t* restrict px;
+  /* process plaintext */
+  while (mlen >= ASCON_RATE) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    if (ASCON_RATE == 16) {
+      XOR(s->x1, LOAD64(m + 8));
+      STORE64(c + 8, s->x1);
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    mlen -= ASCON_RATE;
+  }
+  /* final plaintext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && mlen >= 8) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    mlen -= 8;
+  }
+  if (mlen) {
+    XOR(*px, LOAD(m, mlen));
+    STORE(c, *px, mlen);
+  }
+  XOR(*px, PAD(mlen));
+  printstate("process plaintext", s);
+}
+
+__forceinline void decrypt(state_t* s, uint8_t* m, const uint8_t* c,
+                           uint64_t clen) {
+  word_t* restrict px;
+  word_t cx;
+  /* process ciphertext */
+  while (clen >= ASCON_RATE) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    if (ASCON_RATE == 16) {
+      cx = LOAD64(c + 8);
+      XOR(s->x1, cx);
+      STORE64(m + 8, s->x1);
+      s->x1 = cx;
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    clen -= ASCON_RATE;
+  }
+  /* final ciphertext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && clen >= 8) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    clen -= 8;
+  }
+  if (clen) {
+    cx = LOAD(c, clen);
+    XOR(*px, cx);
+    STORE(m, *px, clen);
+    AND(*px, XMASK(clen));
+    XOR(*px, cx);
+  }
+  XOR(*px, PAD(clen));
+  printstate("process ciphertext", s);
+}
+
+__forceinline void final(state_t* s, const uint8_t* k) {
+  word_t K0, K1, K2;
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* finalization */
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 8) {
+    XOR(s->x1, K1);
+    XOR(s->x2, K2);
+  }
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 16) {
+    XOR(s->x2, K1);
+    XOR(s->x3, K2);
+  }
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(s->x1, KEYROT(K0, K1));
+    XOR(s->x2, KEYROT(K1, K2));
+    XOR(s->x3, KEYROT(K2, WORD_T(0)));
+  }
+  P12(s);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("finalization", s);
+}
+
+#if !ASCON_INLINE_MODE
+
+#define INIT ascon_init
+#define ABSORB ascon_absorb
+#define ENCRYPT ascon_encrypt
+#define DECRYPT ascon_decrypt
+#define FINAL ascon_final
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  init(s, npub, k);
+}
+
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  absorb(s, ad, adlen);
+}
+
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen) {
+  encrypt(s, c, m, mlen);
+}
+
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen) {
+  decrypt(s, m, c, clen);
+}
+
+void ascon_final(state_t* s, const uint8_t* k) { final(s, k); }
+
+#else
+
+#define INIT init
+#define ABSORB absorb
+#define ENCRYPT encrypt
+#define DECRYPT decrypt
+#define FINAL final
+
+#endif
+
+int crypto_aead_encrypt(uint8_t* c, uint64_t* clen, const uint8_t* m,
+                        uint64_t mlen, const uint8_t* ad, uint64_t adlen,
+                        const uint8_t* nsec, const uint8_t* npub,
+                        const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  *clen = mlen + CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  ENCRYPT(&s, c, m, mlen);
+  FINAL(&s, k);
+  /* set tag */
+  c += mlen;
+  STORE64(c, s.x3);
+  STORE64(c + 8, s.x4);
+  return 0;
+}
+
+int crypto_aead_decrypt(uint8_t* m, uint64_t* mlen, uint8_t* nsec,
+                        const uint8_t* c, uint64_t clen, const uint8_t* ad,
+                        uint64_t adlen, const uint8_t* npub, const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  if (clen < CRYPTO_ABYTES) {
+    *mlen = 0;
+    return -1;
+  }
+  *mlen = clen = clen - CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  DECRYPT(&s, m, c, clen);
+  FINAL(&s, k);
+  /* verify tag (should be constant time, check compiler output) */
+  c += clen;
+  XOR(s.x3, LOAD64(c));
+  XOR(s.x4, LOAD64(c + 8));
+  if (NOTZERO(s.x3, s.x4)) {
+    *mlen = 0;
+    return -1;
+  }
+  return 0;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32/ascon.h

+#ifndef ASCON_H_
+#define ASCON_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "word.h"
+
+typedef struct {
+  word_t x0, x1, x2, x3, x4;
+} state_t;
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k);
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen);
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen);
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen);
+void ascon_final(state_t* s, const uint8_t* k);
+
+#endif  // ASCON_H_

ascon/Implementations/crypto_aead/ascon128av12/bi32/config.h

+#ifndef CONFIG_H_
+#define CONFIG_H_
+
+/* inline the Ascon mode */
+#ifndef ASCON_INLINE_MODE
+#define ASCON_INLINE_MODE 1
+#endif
+
+/* inline the Ascon permutations */
+#ifndef ASCON_INLINE_PERM
+#define ASCON_INLINE_PERM 0
+#endif
+
+/* single function for all permutations */
+#ifndef ASCON_SINGLE_PERM
+#define ASCON_SINGLE_PERM 0
+#endif
+
+/* unroll the permutation loops */
+#ifndef ASCON_UNROLL_LOOPS
+#define ASCON_UNROLL_LOOPS 0
+#endif
+
+/* Ascon data access option { 'W'ordwise, 'B'ytewise, 'H'ybrid, 'M'emcpy } */
+#ifndef ASCON_DATA_ACCESS
+#define ASCON_DATA_ACCESS 'M'
+#endif
+
+/* make sure __forceinline is supported */
+#ifndef __forceinline
+#define __forceinline inline __attribute__((always_inline))
+#endif
+
+#endif /* CONFIG_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/endian.h

@@ -3,7 +3,10 @@
 
 
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 
 
-// macros for big endian machines
+/* macros for big endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for big endian machines")
+#endif
 #define U64BIG(x) (x)
 #define U64BIG(x) (x)
 #define U32BIG(x) (x)
 #define U32BIG(x) (x)
 #define U16BIG(x) (x)
 #define U16BIG(x) (x)
@@ -11,21 +14,26 @@
 #elif defined(_MSC_VER) || \
 #elif defined(_MSC_VER) || \
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
 
 
-// macros for little endian machines
+/* macros for little endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for little endian machines")
+#endif
 #define U64BIG(x)                          \
 #define U64BIG(x)                          \
-  ((((x) & 0x00000000000000FFULL) << 56) | (((x) & 0x000000000000FF00ULL) << 40) | \
-   (((x) & 0x0000000000FF0000ULL) << 24) | (((x) & 0x00000000FF000000ULL) << 8) |  \
-   (((x) & 0x000000FF00000000ULL) >> 8) | (((x) & 0x0000FF0000000000ULL) >> 24) |  \
-   (((x) & 0x00FF000000000000ULL) >> 40) | (((x) & 0xFF00000000000000ULL) >> 56))
+  (((0x00000000000000FFULL & (x)) << 56) | \
+   ((0x000000000000FF00ULL & (x)) << 40) | \
+   ((0x0000000000FF0000ULL & (x)) << 24) | \
+   ((0x00000000FF000000ULL & (x)) << 8) |  \
+   ((0x000000FF00000000ULL & (x)) >> 8) |  \
+   ((0x0000FF0000000000ULL & (x)) >> 24) | \
+   ((0x00FF000000000000ULL & (x)) >> 40) | \
+   ((0xFF00000000000000ULL & (x)) >> 56))
 #define U32BIG(x)                                           \
 #define U32BIG(x)                                           \
-  ((((x) & 0x000000FF) << 24) | (((x) & 0x0000FF00) << 8) | \
-   (((x) & 0x00FF0000) >> 8) | (((x) & 0xFF000000) >> 24))
-#define U16BIG(x)                                 \
-  ((((x) & 0x00FF) << 8) | (((x) & 0xFF00) >> 8))
+  (((0x000000FF & (x)) << 24) | ((0x0000FF00 & (x)) << 8) | \
+   ((0x00FF0000 & (x)) >> 8) | ((0xFF000000 & (x)) >> 24))
+#define U16BIG(x) (((0x00FF & (x)) << 8) | ((0xFF00 & (x)) >> 8))
 
 
 #else
 #else
-#error "ascon byte order macros not defined in endian.h"
+#error "Ascon byte order macros not defined in endian.h"
 #endif
 #endif
 
 
-#endif  // ENDIAN_H_
-
+#endif /* ENDIAN_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/loadstore.h

+#ifndef LOADSTORE_H_
+#define LOADSTORE_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "endian.h"
+#include "word.h"
+
+/* 64-bit LSB mask (undefined for n == 0) */
+#define MASK(n) (~0ull >> (64 - (n)))
+
+/* get byte from Ascon 64-bit word */
+#define GETBYTE(x, i) ((uint8_t)((uint64_t)(x) >> (56 - 8 * (i))))
+
+/* set byte in Ascon 64-bit word */
+#define SETBYTE(b, i) ((uint64_t)(b) << (56 - 8 * (i)))
+
+#if ASCON_DATA_ACCESS == 'W'
+
+#ifndef NDEBUG
+#pragma message("Using wordwise data access")
+#endif
+
+__forceinline word_t LOAD64(const uint8_t* bytes) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes);
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE64(uint8_t* bytes, word_t w) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes = U64BIG(x);
+}
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes & MASK(8 * n));
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes &= ~MASK(8 * n);
+  *(uint64_t*)bytes |= U64BIG(x);
+}
+
+#elif ASCON_DATA_ACCESS == 'M'
+
+#ifndef NDEBUG
+#pragma message("Using memcpy to access data")
+#endif
+
+#include <string.h>
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  memcpy((uint8_t*)&x, bytes, n);
+  return U64TOWORD(U64BIG(x));
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = U64BIG(WORDTOU64(w));
+  memcpy(bytes, (uint8_t*)&x, n);
+}
+
+#elif ASCON_DATA_ACCESS == 'B'
+
+#ifndef NDEBUG
+#pragma message("Using bytewise data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#elif ASCON_DATA_ACCESS == 'H'
+
+#ifndef NDEBUG
+#pragma message("Using hybrid data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  if (n == 8)
+    x = U64BIG(*(uint64_t*)bytes);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  if (n == 8)
+    *(uint64_t*)bytes = U64BIG(x);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#else
+#error "Ascon data access macro not defined correctly"
+#endif
+
+#endif /* LOADSTORE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/permutations.c

+#include "permutations.h"
+
+#include "round.h"
+
+#if !ASCON_UNROLL_LOOPS || ASCON_SINGLE_PERM
+
+const uint8_t constants[][2] = {{0xc, 0xc}, {0x9, 0xc}, {0xc, 0x9}, {0x9, 0x9},
+                                {0x6, 0xc}, {0x3, 0xc}, {0x6, 0x9}, {0x3, 0x9},
+                                {0xc, 0x6}, {0x9, 0x6}, {0xc, 0x3}, {0x9, 0x3}};
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+#elif ASCON_SINGLE_PERM
+
+void P(state_t* s, uint8_t rounds) {
+  printstate(" permutation input", s);
+  for (int i = START(rounds); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s) { P12ROUNDS(s); }
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 16
+void P8(state_t* s) { P8ROUNDS(s); }
+#endif
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 8
+void P6(state_t* s) { P6ROUNDS(s); }
+#endif
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32/permutations.h

 #ifndef PERMUTATIONS_H_
 #ifndef PERMUTATIONS_H_
 #define PERMUTATIONS_H_
 #define PERMUTATIONS_H_
 
 
-#include "endian.h"
-
-typedef unsigned char u8;
-typedef unsigned int u32;
-typedef unsigned long long u64;
-
-typedef struct {
-  u32 e;
-  u32 o;
-} u32_2;
-
-#define EXT_BYTE64(x, n) ((u8)((u64)(x) >> (8 * (7 - (n)))))
-#define INS_BYTE64(x, n) ((u64)(x) << (8 * (7 - (n))))
-#define ROTR32(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
-
-// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
-#define to_bit_interleaving(out, in)                          \
-  do {                                                        \
-    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);                 \
-  } while (0)
-
-// Credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002
-#define from_bit_interleaving(out, in)                        \
-  do {                                                        \
-    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;                                 \
-  } while (0)
-
-#define ROUND(C_e, C_o) \
-  do { \
-    /* round constant */ \
-    x2.e ^= C_e;                      x2.o ^= C_o; \
-    /* s-box 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; \
-  } while(0)
-
-#define P12()        \
-  do {               \
-    ROUND(0xc, 0xc); \
-    ROUND(0x9, 0xc); \
-    ROUND(0xc, 0x9); \
-    ROUND(0x9, 0x9); \
-    ROUND(0x6, 0xc); \
-    ROUND(0x3, 0xc); \
-    ROUND(0x6, 0x9); \
-    ROUND(0x3, 0x9); \
-    ROUND(0xc, 0x6); \
-    ROUND(0x9, 0x6); \
-    ROUND(0xc, 0x3); \
-    ROUND(0x9, 0x3); \
-  } while (0)
-
-#define P8()         \
-  do {               \
-    ROUND(0x6, 0xc); \
-    ROUND(0x3, 0xc); \
-    ROUND(0x6, 0x9); \
-    ROUND(0x3, 0x9); \
-    ROUND(0xc, 0x6); \
-    ROUND(0x9, 0x6); \
-    ROUND(0xc, 0x3); \
-    ROUND(0x9, 0x3); \
-  } while (0)
-
-#define P6()         \
-  do {               \
-    ROUND(0x6, 0x9); \
-    ROUND(0x3, 0x9); \
-    ROUND(0xc, 0x6); \
-    ROUND(0x9, 0x6); \
-    ROUND(0xc, 0x3); \
-    ROUND(0x9, 0x3); \
-  } while (0)
-
-#endif  // PERMUTATIONS_H_
+#include <stdint.h>
 
 
+#include "api.h"
+#include "ascon.h"
+#include "printstate.h"
+#include "round.h"
+
+#define ASCON_128_KEYBYTES 16
+#define ASCON_128A_KEYBYTES 16
+#define ASCON_80PQ_KEYBYTES 20
+
+#define ASCON_128_RATE 8
+#define ASCON_128A_RATE 16
+
+#define ASCON_128_PA_ROUNDS 12
+#define ASCON_128_PB_ROUNDS 6
+#define ASCON_128A_PB_ROUNDS 8
+
+#define ASCON_HASH_BYTES 32
+
+#define ASCON_128_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |     \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_128A_IV                                    \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128A_RATE * 8) << 48) |    \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128A_PB_ROUNDS) << 32))
+
+#define ASCON_80PQ_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_80PQ_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |      \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |     \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_HASH_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) |  \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) | \
+            ((uint64_t)(ASCON_HASH_BYTES * 8) << 0))
+
+#define ASCON_XOF_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) | \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40))
+
+#define ASCON_HASH_IV0 U64TOWORD(0xee9398aadb67f03dull)
+#define ASCON_HASH_IV1 U64TOWORD(0x8bb21831c60f1002ull)
+#define ASCON_HASH_IV2 U64TOWORD(0xb48a92db98d5da62ull)
+#define ASCON_HASH_IV3 U64TOWORD(0x43189921b8f8e3e8ull)
+#define ASCON_HASH_IV4 U64TOWORD(0x348fa5c9d525e140ull)
+
+#define ASCON_XOF_IV0 U64TOWORD(0xb57e273b814cd416ull)
+#define ASCON_XOF_IV1 U64TOWORD(0x2b51042562ae2420ull)
+#define ASCON_XOF_IV2 U64TOWORD(0x66a3a7768ddf2218ull)
+#define ASCON_XOF_IV3 U64TOWORD(0x5aad0a7a8153650cull)
+#define ASCON_XOF_IV4 U64TOWORD(0x4f3e0e32539493b6ull)
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 16
+#define IV ASCON_128_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#if ASCON_RATE == 16
+#define IV ASCON_128A_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 8
+#define PB P8
+#endif
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 20
+#define IV ASCON_80PQ_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#define START(n) (12 - n)
+
+#if ASCON_UNROLL_LOOPS
+
+__forceinline void P12ROUNDS(state_t* s) {
+  ROUND(s, 0xc, 0xc);
+  ROUND(s, 0x9, 0xc);
+  ROUND(s, 0xc, 0x9);
+  ROUND(s, 0x9, 0x9);
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+#else /* !ASCON_UNROLL_LOOPS */
+
+extern const uint8_t constants[][2];
+
+__forceinline void P12ROUNDS(state_t* s) {
+  for (int i = START(12); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  for (int i = START(8); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  for (int i = START(6); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+__forceinline void P12(state_t* s) {
+  printstate(" permutation input", s);
+  P12ROUNDS(s);
+}
+
+__forceinline void P8(state_t* s) {
+  printstate(" permutation input", s);
+  P8ROUNDS(s);
+}
+
+__forceinline void P6(state_t* s) {
+  printstate(" permutation input", s);
+  P6ROUNDS(s);
+}
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#elif ASCON_SINGLE_PERM
+
+#define P12(s) P(s, 12)
+#define P8(s) P(s, 8)
+#define P6(s) P(s, 6)
+
+void P(state_t* s, uint8_t rounds);
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s);
+void P8(state_t* s);
+void P6(state_t* s);
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#endif
+
+#endif /* PERMUTATIONS_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/printstate.h

+#ifndef PRINTSTATE_H_
+#define PRINTSTATE_H_
+
+#ifdef NDEBUG
+
+#define printword(text, w)
+#define printstate(text, s)
+
+#else
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "ascon.h"
+
+__forceinline void printword(const char* text, const word_t x) {
+  printf("%s=%016" PRIx64 "\n", text, WORDTOU64(x));
+}
+
+__forceinline void printstate(const char* text, const state_t* s) {
+  printf("%s:\n", text);
+  printword("  x0", s->x0);
+  printword("  x1", s->x1);
+  printword("  x2", s->x2);
+  printword("  x3", s->x3);
+  printword("  x4", s->x4);
+}
+
+#endif
+
+#endif /* PRINTSTATE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/round.h

+#ifndef ROUND_H_
+#define ROUND_H_
+
+#include "ascon.h"
+#include "printstate.h"
+
+__forceinline void KINIT(word_t* K0, word_t* K1, word_t* K2) {
+  *K0 = WORD_T(0);
+  *K1 = WORD_T(0);
+  *K2 = WORD_T(0);
+}
+
+__forceinline void PINIT(state_t* s) {
+  s->x0 = WORD_T(0);
+  s->x1 = WORD_T(0);
+  s->x2 = WORD_T(0);
+  s->x3 = WORD_T(0);
+  s->x4 = WORD_T(0);
+}
+
+__forceinline void ROUND(state_t* s, uint32_t C_e, uint32_t C_o) {
+  state_t t;
+  /* round constant */
+  s->x2.e ^= C_e;
+  s->x2.o ^= C_o;
+  /* s-box layer */
+  s->x0.e ^= s->x4.e;
+  s->x0.o ^= s->x4.o;
+  s->x4.e ^= s->x3.e;
+  s->x4.o ^= s->x3.o;
+  s->x2.e ^= s->x1.e;
+  s->x2.o ^= s->x1.o;
+  t.x0.e = s->x0.e;
+  t.x0.o = s->x0.o;
+  t.x4.e = s->x4.e;
+  t.x4.o = s->x4.o;
+  t.x3.e = s->x3.e;
+  t.x3.o = s->x3.o;
+  t.x1.e = s->x1.e;
+  t.x1.o = s->x1.o;
+  t.x2.e = s->x2.e;
+  t.x2.o = s->x2.o;
+  s->x0.e = t.x0.e ^ (~t.x1.e & t.x2.e);
+  s->x0.o = t.x0.o ^ (~t.x1.o & t.x2.o);
+  s->x2.e = t.x2.e ^ (~t.x3.e & t.x4.e);
+  s->x2.o = t.x2.o ^ (~t.x3.o & t.x4.o);
+  s->x4.e = t.x4.e ^ (~t.x0.e & t.x1.e);
+  s->x4.o = t.x4.o ^ (~t.x0.o & t.x1.o);
+  s->x1.e = t.x1.e ^ (~t.x2.e & t.x3.e);
+  s->x1.o = t.x1.o ^ (~t.x2.o & t.x3.o);
+  s->x3.e = t.x3.e ^ (~t.x4.e & t.x0.e);
+  s->x3.o = t.x3.o ^ (~t.x4.o & t.x0.o);
+  s->x1.e ^= s->x0.e;
+  s->x1.o ^= s->x0.o;
+  s->x3.e ^= s->x2.e;
+  s->x3.o ^= s->x2.o;
+  s->x0.e ^= s->x4.e;
+  s->x0.o ^= s->x4.o;
+  /* linear layer */
+  t.x0.e = s->x0.e ^ ROR32(s->x0.o, 4);
+  t.x0.o = s->x0.o ^ ROR32(s->x0.e, 5);
+  t.x1.e = s->x1.e ^ ROR32(s->x1.e, 11);
+  t.x1.o = s->x1.o ^ ROR32(s->x1.o, 11);
+  t.x2.e = s->x2.e ^ ROR32(s->x2.o, 2);
+  t.x2.o = s->x2.o ^ ROR32(s->x2.e, 3);
+  t.x3.e = s->x3.e ^ ROR32(s->x3.o, 3);
+  t.x3.o = s->x3.o ^ ROR32(s->x3.e, 4);
+  t.x4.e = s->x4.e ^ ROR32(s->x4.e, 17);
+  t.x4.o = s->x4.o ^ ROR32(s->x4.o, 17);
+  s->x0.e ^= ROR32(t.x0.o, 9);
+  s->x0.o ^= ROR32(t.x0.e, 10);
+  s->x1.e ^= ROR32(t.x1.o, 19);
+  s->x1.o ^= ROR32(t.x1.e, 20);
+  s->x2.e ^= t.x2.o;
+  s->x2.o ^= ROR32(t.x2.e, 1);
+  s->x3.e ^= ROR32(t.x3.e, 5);
+  s->x3.o ^= ROR32(t.x3.o, 5);
+  s->x4.e ^= ROR32(t.x4.o, 3);
+  s->x4.o ^= ROR32(t.x4.e, 4);
+  s->x2.e = ~s->x2.e;
+  s->x2.o = ~s->x2.o;
+  printstate(" round output", s);
+}
+
+#endif /* ROUND_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32/word.h

+#ifndef WORD_H_
+#define WORD_H_
+
+#include <stdint.h>
+
+#include "config.h"
+
+typedef struct {
+  uint32_t e;
+  uint32_t o;
+} word_t;
+
+__forceinline word_t WORD_T(uint64_t x) {
+  return (word_t){.o = x >> 32, .e = x};
+}
+
+__forceinline uint64_t UINT64_T(word_t x) { return (uint64_t)x.o << 32 | x.e; }
+
+__forceinline uint64_t TOBI32(uint64_t in);
+
+__forceinline uint64_t FROMBI32(uint64_t in);
+
+__forceinline word_t U64TOWORD(uint64_t x) {
+  uint64_t w = TOBI32(x);
+  return (word_t){.o = w >> 32, .e = w};
+}
+
+__forceinline uint64_t WORDTOU64(word_t w) {
+  return FROMBI32((uint64_t)w.o << 32 | w.e);
+}
+
+#define XOR(a, b)  \
+  do {             \
+    word_t tb = b; \
+    (a).e ^= tb.e; \
+    (a).o ^= tb.o; \
+  } while (0)
+
+#define AND(a, b)  \
+  do {             \
+    word_t tb = b; \
+    (a).e &= tb.e; \
+    (a).o &= tb.o; \
+  } while (0)
+
+__forceinline uint32_t ROR32(uint32_t x, int n) {
+  return x >> n | x << (32 - n);
+}
+
+__forceinline word_t ROR64(word_t x, int n) {
+  word_t r;
+  r.e = (n % 2) ? ROR32(x.o, (n - 1) / 2) : ROR32(x.e, n / 2);
+  r.o = (n % 2) ? ROR32(x.e, (n + 1) / 2) : ROR32(x.o, n / 2);
+  return r;
+}
+
+__forceinline word_t KEYROT(word_t lo2hi, word_t hi2lo) {
+  word_t r;
+  r.o = lo2hi.o << 16 | hi2lo.o >> 16;
+  r.e = lo2hi.e << 16 | hi2lo.e >> 16;
+  return r;
+}
+
+__forceinline int NOTZERO(word_t a, word_t b) {
+  int result = 0;
+  for (int i = 0; i < 8; ++i) result |= ((uint8_t*)&a)[i];
+  for (int i = 0; i < 8; ++i) result |= ((uint8_t*)&b)[i];
+  return result;
+}
+
+/* set padding byte in 64-bit Ascon word */
+__forceinline word_t PAD(int i) {
+  return WORD_T((uint64_t)(0x08 << (28 - 4 * i)) << 32);
+}
+
+/* byte mask for 64-bit Ascon word (1 <= n <= 8) */
+__forceinline word_t XMASK(int n) {
+  uint32_t mask = 0x0fffffff >> (n * 4 - 4);
+  return WORD_T((uint64_t)mask << 32 | mask);
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+__forceinline uint64_t TOBI32(uint64_t in) {
+  uint32_t hi = in >> 32;
+  uint32_t lo = in;
+  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);
+  r0 = (lo & 0x0000FFFF) | (hi << 16);
+  r1 = (lo >> 16) | (hi & 0xFFFF0000);
+  return (uint64_t)r1 << 32 | r0;
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+__forceinline uint64_t FROMBI32(uint64_t in) {
+  uint32_t r0 = in;
+  uint32_t r1 = in >> 32;
+  uint32_t lo = (r0 & 0x0000FFFF) | (r1 << 16);
+  uint32_t hi = (r0 >> 16) | (r1 & 0xFFFF0000);
+  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);
+  return (uint64_t)hi << 32 | lo;
+}
+
+#endif /* WORD_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/api.h

+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/ascon.c

+#include "ascon.h"
+
+#include "api.h"
+#include "loadstore.h"
+#include "permutations.h"
+#include "printstate.h"
+
+__forceinline void loadkey(word_t* K0, word_t* K1, word_t* K2,
+                           const uint8_t* k) {
+  KINIT(K0, K1, K2);
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(*K0, KEYROT(WORD_T(0), LOAD(k, 4)));
+    k += 4;
+  }
+  XOR(*K1, LOAD64(k));
+  XOR(*K2, LOAD64(k + 8));
+}
+
+__forceinline void init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  word_t N0, N1;
+  word_t K0, K1, K2;
+  /* load nonce */
+  N0 = LOAD64(npub);
+  N1 = LOAD64(npub + 8);
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* initialization */
+  PINIT(s);
+  XOR(s->x0, IV);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x0, K0);
+  XOR(s->x1, K1);
+  XOR(s->x2, K2);
+  XOR(s->x3, N0);
+  XOR(s->x4, N1);
+  P12(s);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x2, K0);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("initialization", s);
+}
+
+__forceinline void absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  word_t* restrict px;
+  /* process associated data */
+  if (adlen) {
+    while (adlen >= ASCON_RATE) {
+      XOR(s->x0, LOAD64(ad));
+      if (ASCON_RATE == 16) XOR(s->x1, LOAD64(ad + 8));
+      PB(s);
+      ad += ASCON_RATE;
+      adlen -= ASCON_RATE;
+    }
+    /* final associated data block */
+    px = &s->x0;
+    if (ASCON_RATE == 16 && adlen >= 8) {
+      XOR(s->x0, LOAD64(ad));
+      px = &s->x1;
+      ad += 8;
+      adlen -= 8;
+    }
+    if (adlen) XOR(*px, LOAD(ad, adlen));
+    XOR(*px, PAD(adlen));
+    PB(s);
+  }
+  XOR(s->x4, WORD_T(1));
+  printstate("process associated data", s);
+}
+
+__forceinline void encrypt(state_t* s, uint8_t* c, const uint8_t* m,
+                           uint64_t mlen) {
+  word_t* restrict px;
+  /* process plaintext */
+  while (mlen >= ASCON_RATE) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    if (ASCON_RATE == 16) {
+      XOR(s->x1, LOAD64(m + 8));
+      STORE64(c + 8, s->x1);
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    mlen -= ASCON_RATE;
+  }
+  /* final plaintext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && mlen >= 8) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    mlen -= 8;
+  }
+  if (mlen) {
+    XOR(*px, LOAD(m, mlen));
+    STORE(c, *px, mlen);
+  }
+  XOR(*px, PAD(mlen));
+  printstate("process plaintext", s);
+}
+
+__forceinline void decrypt(state_t* s, uint8_t* m, const uint8_t* c,
+                           uint64_t clen) {
+  word_t* restrict px;
+  word_t cx;
+  /* process ciphertext */
+  while (clen >= ASCON_RATE) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    if (ASCON_RATE == 16) {
+      cx = LOAD64(c + 8);
+      XOR(s->x1, cx);
+      STORE64(m + 8, s->x1);
+      s->x1 = cx;
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    clen -= ASCON_RATE;
+  }
+  /* final ciphertext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && clen >= 8) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    clen -= 8;
+  }
+  if (clen) {
+    cx = LOAD(c, clen);
+    XOR(*px, cx);
+    STORE(m, *px, clen);
+    AND(*px, XMASK(clen));
+    XOR(*px, cx);
+  }
+  XOR(*px, PAD(clen));
+  printstate("process ciphertext", s);
+}
+
+__forceinline void final(state_t* s, const uint8_t* k) {
+  word_t K0, K1, K2;
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* finalization */
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 8) {
+    XOR(s->x1, K1);
+    XOR(s->x2, K2);
+  }
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 16) {
+    XOR(s->x2, K1);
+    XOR(s->x3, K2);
+  }
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(s->x1, KEYROT(K0, K1));
+    XOR(s->x2, KEYROT(K1, K2));
+    XOR(s->x3, KEYROT(K2, WORD_T(0)));
+  }
+  P12(s);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("finalization", s);
+}
+
+#if !ASCON_INLINE_MODE
+
+#define INIT ascon_init
+#define ABSORB ascon_absorb
+#define ENCRYPT ascon_encrypt
+#define DECRYPT ascon_decrypt
+#define FINAL ascon_final
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  init(s, npub, k);
+}
+
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  absorb(s, ad, adlen);
+}
+
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen) {
+  encrypt(s, c, m, mlen);
+}
+
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen) {
+  decrypt(s, m, c, clen);
+}
+
+void ascon_final(state_t* s, const uint8_t* k) { final(s, k); }
+
+#else
+
+#define INIT init
+#define ABSORB absorb
+#define ENCRYPT encrypt
+#define DECRYPT decrypt
+#define FINAL final
+
+#endif
+
+int crypto_aead_encrypt(uint8_t* c, uint64_t* clen, const uint8_t* m,
+                        uint64_t mlen, const uint8_t* ad, uint64_t adlen,
+                        const uint8_t* nsec, const uint8_t* npub,
+                        const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  *clen = mlen + CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  ENCRYPT(&s, c, m, mlen);
+  FINAL(&s, k);
+  /* set tag */
+  c += mlen;
+  STORE64(c, s.x3);
+  STORE64(c + 8, s.x4);
+  return 0;
+}
+
+int crypto_aead_decrypt(uint8_t* m, uint64_t* mlen, uint8_t* nsec,
+                        const uint8_t* c, uint64_t clen, const uint8_t* ad,
+                        uint64_t adlen, const uint8_t* npub, const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  if (clen < CRYPTO_ABYTES) {
+    *mlen = 0;
+    return -1;
+  }
+  *mlen = clen = clen - CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  DECRYPT(&s, m, c, clen);
+  FINAL(&s, k);
+  /* verify tag (should be constant time, check compiler output) */
+  c += clen;
+  XOR(s.x3, LOAD64(c));
+  XOR(s.x4, LOAD64(c + 8));
+  if (NOTZERO(s.x3, s.x4)) {
+    *mlen = 0;
+    return -1;
+  }
+  return 0;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/ascon.h

+#ifndef ASCON_H_
+#define ASCON_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "word.h"
+
+typedef struct {
+  word_t x0, x1, x2, x3, x4;
+  word_t rx;
+} state_t;
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k);
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen);
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen);
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen);
+void ascon_final(state_t* s, const uint8_t* k);
+
+#endif  // ASCON_H_

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/config.h

+#ifndef CONFIG_H_
+#define CONFIG_H_
+
+/* inline the Ascon mode */
+#ifndef ASCON_INLINE_MODE
+#define ASCON_INLINE_MODE 1
+#endif
+
+/* inline the Ascon permutations */
+#ifndef ASCON_INLINE_PERM
+#define ASCON_INLINE_PERM 0
+#endif
+
+/* single function for all permutations */
+#ifndef ASCON_SINGLE_PERM
+#define ASCON_SINGLE_PERM 0
+#endif
+
+/* unroll the permutation loops */
+#ifndef ASCON_UNROLL_LOOPS
+#define ASCON_UNROLL_LOOPS 0
+#endif
+
+/* Ascon data access option { 'W'ordwise, 'B'ytewise, 'H'ybrid, 'M'emcpy } */
+#ifndef ASCON_DATA_ACCESS
+#define ASCON_DATA_ACCESS 'B'
+#endif
+
+/* Ascon mask generator { 'S'tdlib, 'X'orshift, 'R'andombytes } */
+#ifndef ASCON_MASK_RNG
+#define ASCON_MASK_RNG 'X'
+#endif
+
+/* mask key/data loads */
+#ifndef ASCON_MASK_LOADS
+#define ASCON_MASK_LOADS 0
+#endif
+
+/* make sure __forceinline is supported */
+#ifndef __forceinline
+#define __forceinline inline __attribute__((always_inline))
+#endif
+
+#endif /* CONFIG_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/endian.h

+#ifndef ENDIAN_H_
+#define ENDIAN_H_
+
+#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+
+/* macros for big endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for big endian machines")
+#endif
+#define U64BIG(x) (x)
+#define U32BIG(x) (x)
+#define U16BIG(x) (x)
+
+#elif defined(_MSC_VER) || \
+    (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+
+/* macros for little endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for little endian machines")
+#endif
+#define U64BIG(x)                          \
+  (((0x00000000000000FFULL & (x)) << 56) | \
+   ((0x000000000000FF00ULL & (x)) << 40) | \
+   ((0x0000000000FF0000ULL & (x)) << 24) | \
+   ((0x00000000FF000000ULL & (x)) << 8) |  \
+   ((0x000000FF00000000ULL & (x)) >> 8) |  \
+   ((0x0000FF0000000000ULL & (x)) >> 24) | \
+   ((0x00FF000000000000ULL & (x)) >> 40) | \
+   ((0xFF00000000000000ULL & (x)) >> 56))
+#define U32BIG(x)                                           \
+  (((0x000000FF & (x)) << 24) | ((0x0000FF00 & (x)) << 8) | \
+   ((0x00FF0000 & (x)) >> 8) | ((0xFF000000 & (x)) >> 24))
+#define U16BIG(x) (((0x00FF & (x)) << 8) | ((0xFF00 & (x)) >> 8))
+
+#else
+#error "Ascon byte order macros not defined in endian.h"
+#endif
+
+#endif /* ENDIAN_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/implementors

+Christoph Dobraunig
+Martin Schläffer

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/loadstore.h

+#ifndef LOADSTORE_H_
+#define LOADSTORE_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "endian.h"
+#include "word.h"
+
+/* 64-bit LSB mask (undefined for n == 0) */
+#define MASK(n) (~0ull >> (64 - (n)))
+
+/* get byte from Ascon 64-bit word */
+#define GETBYTE(x, i) ((uint8_t)((uint64_t)(x) >> (56 - 8 * (i))))
+
+/* set byte in Ascon 64-bit word */
+#define SETBYTE(b, i) ((uint64_t)(b) << (56 - 8 * (i)))
+
+#if ASCON_DATA_ACCESS == 'W'
+
+#ifndef NDEBUG
+#pragma message("Using wordwise data access")
+#endif
+
+__forceinline word_t LOAD64(const uint8_t* bytes) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes);
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE64(uint8_t* bytes, word_t w) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes = U64BIG(x);
+}
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes & MASK(8 * n));
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes &= ~MASK(8 * n);
+  *(uint64_t*)bytes |= U64BIG(x);
+}
+
+#elif ASCON_DATA_ACCESS == 'M'
+
+#ifndef NDEBUG
+#pragma message("Using memcpy to access data")
+#endif
+
+#include <string.h>
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  memcpy((uint8_t*)&x, bytes, n);
+  return U64TOWORD(U64BIG(x));
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = U64BIG(WORDTOU64(w));
+  memcpy(bytes, (uint8_t*)&x, n);
+}
+
+#elif ASCON_DATA_ACCESS == 'B'
+
+#ifndef NDEBUG
+#pragma message("Using bytewise data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#elif ASCON_DATA_ACCESS == 'H'
+
+#ifndef NDEBUG
+#pragma message("Using hybrid data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  if (n == 8)
+    x = U64BIG(*(uint64_t*)bytes);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  if (n == 8)
+    *(uint64_t*)bytes = U64BIG(x);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#else
+#error "Ascon data access macro not defined correctly"
+#endif
+
+#endif /* LOADSTORE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/permutations.c

+#include "permutations.h"
+
+#include "round.h"
+
+#if !ASCON_UNROLL_LOOPS || ASCON_SINGLE_PERM
+
+const uint8_t constants[][2] = {{0xc, 0xc}, {0x9, 0xc}, {0xc, 0x9}, {0x9, 0x9},
+                                {0x6, 0xc}, {0x3, 0xc}, {0x6, 0x9}, {0x3, 0x9},
+                                {0xc, 0x6}, {0x9, 0x6}, {0xc, 0x3}, {0x9, 0x3}};
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+#elif ASCON_SINGLE_PERM
+
+void P(state_t* s, uint8_t rounds) {
+  printstate(" permutation input", s);
+  for (int i = START(rounds); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s) { P12ROUNDS(s); }
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 16
+void P8(state_t* s) { P8ROUNDS(s); }
+#endif
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 8
+void P6(state_t* s) { P6ROUNDS(s); }
+#endif
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/permutations.h

+#ifndef PERMUTATIONS_H_
+#define PERMUTATIONS_H_
+
+#include <stdint.h>
+
+#include "api.h"
+#include "ascon.h"
+#include "printstate.h"
+#include "round.h"
+
+#define ASCON_128_KEYBYTES 16
+#define ASCON_128A_KEYBYTES 16
+#define ASCON_80PQ_KEYBYTES 20
+
+#define ASCON_128_RATE 8
+#define ASCON_128A_RATE 16
+
+#define ASCON_128_PA_ROUNDS 12
+#define ASCON_128_PB_ROUNDS 6
+#define ASCON_128A_PB_ROUNDS 8
+
+#define ASCON_HASH_BYTES 32
+
+#define ASCON_128_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |     \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_128A_IV                                    \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128A_RATE * 8) << 48) |    \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128A_PB_ROUNDS) << 32))
+
+#define ASCON_80PQ_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_80PQ_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |      \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |     \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_HASH_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) |  \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) | \
+            ((uint64_t)(ASCON_HASH_BYTES * 8) << 0))
+
+#define ASCON_XOF_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) | \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40))
+
+#define ASCON_HASH_IV0 U64TOWORD(0xee9398aadb67f03dull)
+#define ASCON_HASH_IV1 U64TOWORD(0x8bb21831c60f1002ull)
+#define ASCON_HASH_IV2 U64TOWORD(0xb48a92db98d5da62ull)
+#define ASCON_HASH_IV3 U64TOWORD(0x43189921b8f8e3e8ull)
+#define ASCON_HASH_IV4 U64TOWORD(0x348fa5c9d525e140ull)
+
+#define ASCON_XOF_IV0 U64TOWORD(0xb57e273b814cd416ull)
+#define ASCON_XOF_IV1 U64TOWORD(0x2b51042562ae2420ull)
+#define ASCON_XOF_IV2 U64TOWORD(0x66a3a7768ddf2218ull)
+#define ASCON_XOF_IV3 U64TOWORD(0x5aad0a7a8153650cull)
+#define ASCON_XOF_IV4 U64TOWORD(0x4f3e0e32539493b6ull)
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 16
+#define IV ASCON_128_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#if ASCON_RATE == 16
+#define IV ASCON_128A_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 8
+#define PB P8
+#endif
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 20
+#define IV ASCON_80PQ_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#define START(n) (12 - n)
+
+#if ASCON_UNROLL_LOOPS
+
+__forceinline void P12ROUNDS(state_t* s) {
+  ROUND(s, 0xc, 0xc);
+  ROUND(s, 0x9, 0xc);
+  ROUND(s, 0xc, 0x9);
+  ROUND(s, 0x9, 0x9);
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+#else /* !ASCON_UNROLL_LOOPS */
+
+extern const uint8_t constants[][2];
+
+__forceinline void P12ROUNDS(state_t* s) {
+  for (int i = START(12); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  for (int i = START(8); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  for (int i = START(6); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+__forceinline void P12(state_t* s) {
+  printstate(" permutation input", s);
+  P12ROUNDS(s);
+}
+
+__forceinline void P8(state_t* s) {
+  printstate(" permutation input", s);
+  P8ROUNDS(s);
+}
+
+__forceinline void P6(state_t* s) {
+  printstate(" permutation input", s);
+  P6ROUNDS(s);
+}
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#elif ASCON_SINGLE_PERM
+
+#define P12(s) P(s, 12)
+#define P8(s) P(s, 8)
+#define P6(s) P(s, 6)
+
+void P(state_t* s, uint8_t rounds);
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s);
+void P8(state_t* s);
+void P6(state_t* s);
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#endif
+
+#endif /* PERMUTATIONS_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/printstate.h

+#ifndef PRINTSTATE_H_
+#define PRINTSTATE_H_
+
+#ifdef NDEBUG
+
+#define printword(text, w)
+#define printstate(text, s)
+
+#else
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "ascon.h"
+
+__forceinline void printword(const char* text, const word_t x) {
+  printf("%s=%016" PRIx64 "\n", text, WORDTOU64(x));
+}
+
+__forceinline void printstate(const char* text, const state_t* s) {
+  printf("%s:\n", text);
+  printword("  x0", s->x0);
+  printword("  x1", s->x1);
+  printword("  x2", s->x2);
+  printword("  x3", s->x3);
+  printword("  x4", s->x4);
+}
+
+#endif
+
+#endif /* PRINTSTATE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/random.c

+
+#include "random.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+#include "config.h"
+
+#if ASCON_MASK_RNG == 'R'
+
+void randinit() { srand(time(0)); }
+
+uint32_t rand32() {
+  uint32_t r;
+  randombytes(&r, 4);
+  return r;
+}
+
+uint64_t rand64() {
+  uint64_t r;
+  randombytes(&r, 8);
+  return r;
+}
+
+#elif ASCON_MASK_RNG == 'S'
+
+void randinit() { srand(time(0)); }
+
+uint32_t rand32() { return ((uint32_t)rand() << 21) ^ rand(); }
+
+uint64_t rand64() {
+  return ((uint64_t)rand() << 43) ^ ((uint64_t)rand() << 21) ^ rand();
+}
+
+#elif ASCON_MASK_RNG == 'X'
+
+uint32_t xorshift32;
+uint64_t xorshift64;
+
+void randinit() {
+  srand(time(0));
+  xorshift32 = rand();
+  xorshift64 = (uint64_t)rand() << 32 | rand();
+}
+
+uint32_t rand32() {
+  uint32_t x = xorshift32;
+  x ^= x << 13;
+  x ^= x >> 17;
+  x ^= x << 5;
+  return xorshift32 = x;
+}
+
+uint64_t rand64() {
+  uint64_t x = xorshift64;
+  x ^= x << 13;
+  x ^= x >> 7;
+  x ^= x << 17;
+  return xorshift64 = x;
+}
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/random.h

+#ifndef RANDOM_H_
+#define RANDOM_H_
+
+#include <stdint.h>
+
+void randinit();
+uint32_t rand32();
+uint64_t rand64();
+
+#endif /* RANDOM_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/round.h

+#ifndef ROUND_H_
+#define ROUND_H_
+
+#include "ascon.h"
+#include "printstate.h"
+#include "random.h"
+
+__forceinline void KINIT(word_t* K0, word_t* K1, word_t* K2) {
+  *K0 = TOSHARES(0);
+  *K1 = TOSHARES(0);
+  *K2 = TOSHARES(0);
+}
+
+__forceinline void PINIT(state_t* s) {
+  randinit();
+  s->x0 = TOSHARES(0);
+  s->x1 = TOSHARES(0);
+  s->x2 = TOSHARES(0);
+  s->x3 = TOSHARES(0);
+  s->x4 = TOSHARES(0);
+  s->rx = TOSHARES(0);
+}
+
+#define TOFFOLI(a0, a1, b0, b1, c0, c1) \
+  do {                                  \
+    (a0) ^= (~(b0)) & (c1);             \
+    (a0) ^= (~(b0)) & (c0);             \
+    (a1) ^= (b1) & (c1);                \
+    (a1) ^= (b1) & (c0);                \
+  } while (0)
+
+__forceinline void ROUND(state_t* s, uint32_t C_e, uint32_t C_o) {
+  state_t t;
+  /* refresh randomness */
+  /* s->rx = TOSHARES(0); */
+  /* addition of round constant */
+  s->x2.s0.e ^= C_e;
+  /* substitution layer */
+  s->x0.s0.e ^= s->x4.s0.e;
+  s->x4.s0.e ^= s->x3.s0.e;
+  s->x2.s0.e ^= s->x1.s0.e;
+  s->x0.s1.e ^= s->x4.s1.e;
+  s->x4.s1.e ^= s->x3.s1.e;
+  s->x2.s1.e ^= s->x1.s1.e;
+  /* start of shared keccak s-box from https://eprint.iacr.org/2019/536 */
+  s->rx.s0.e = s->rx.s1.e;
+  TOFFOLI(s->rx.s0.e, s->rx.s1.e, s->x4.s0.e, s->x4.s1.e, s->x0.s0.e,
+          s->x0.s1.e);
+  TOFFOLI(s->x0.s0.e, s->x0.s1.e, s->x1.s0.e, s->x1.s1.e, s->x2.s0.e,
+          s->x2.s1.e);
+  TOFFOLI(s->x2.s0.e, s->x2.s1.e, s->x3.s0.e, s->x3.s1.e, s->x4.s0.e,
+          s->x4.s1.e);
+  TOFFOLI(s->x4.s0.e, s->x4.s1.e, s->x0.s0.e, s->x0.s1.e, s->x1.s0.e,
+          s->x1.s1.e);
+  TOFFOLI(s->x1.s0.e, s->x1.s1.e, s->x2.s0.e, s->x2.s1.e, s->x3.s0.e,
+          s->x3.s1.e);
+  s->x3.s1.e ^= s->rx.s1.e;
+  s->x3.s0.e ^= s->rx.s0.e;
+  /* end of shared keccak s-box */
+  s->x1.s0.e ^= s->x0.s0.e;
+  s->x0.s0.e ^= s->x4.s0.e;
+  s->x3.s0.e ^= s->x2.s0.e;
+  s->x2.s0.e = ~s->x2.s0.e;
+  s->x1.s1.e ^= s->x0.s1.e;
+  s->x0.s1.e ^= s->x4.s1.e;
+  s->x3.s1.e ^= s->x2.s1.e;
+  /* addition of round constant */
+  s->x2.s0.o ^= C_o;
+  /* substitution layer */
+  s->x0.s0.o ^= s->x4.s0.o;
+  s->x4.s0.o ^= s->x3.s0.o;
+  s->x2.s0.o ^= s->x1.s0.o;
+  s->x0.s1.o ^= s->x4.s1.o;
+  s->x4.s1.o ^= s->x3.s1.o;
+  s->x2.s1.o ^= s->x1.s1.o;
+  /* start of shared keccak s-box from https://eprint.iacr.org/2019/536 */
+  s->rx.s0.o = s->rx.s1.o;
+  TOFFOLI(s->rx.s0.o, s->rx.s1.o, s->x4.s0.o, s->x4.s1.o, s->x0.s0.o,
+          s->x0.s1.o);
+  TOFFOLI(s->x0.s0.o, s->x0.s1.o, s->x1.s0.o, s->x1.s1.o, s->x2.s0.o,
+          s->x2.s1.o);
+  TOFFOLI(s->x2.s0.o, s->x2.s1.o, s->x3.s0.o, s->x3.s1.o, s->x4.s0.o,
+          s->x4.s1.o);
+  TOFFOLI(s->x4.s0.o, s->x4.s1.o, s->x0.s0.o, s->x0.s1.o, s->x1.s0.o,
+          s->x1.s1.o);
+  TOFFOLI(s->x1.s0.o, s->x1.s1.o, s->x2.s0.o, s->x2.s1.o, s->x3.s0.o,
+          s->x3.s1.o);
+  s->x3.s1.o ^= s->rx.s1.o;
+  s->x3.s0.o ^= s->rx.s0.o;
+  /* end of shared keccak s-box */
+  s->x1.s0.o ^= s->x0.s0.o;
+  s->x0.s0.o ^= s->x4.s0.o;
+  s->x3.s0.o ^= s->x2.s0.o;
+  s->x2.s0.o = ~s->x2.s0.o;
+  s->x1.s1.o ^= s->x0.s1.o;
+  s->x0.s1.o ^= s->x4.s1.o;
+  s->x3.s1.o ^= s->x2.s1.o;
+  /* linear diffusion layer */
+  t.x0.s1.e = s->x0.s1.e ^ ROR32(s->x0.s1.o, 4);
+  t.x0.s1.o = s->x0.s1.o ^ ROR32(s->x0.s1.e, 5);
+  t.x1.s1.e = s->x1.s1.e ^ ROR32(s->x1.s1.e, 11);
+  t.x1.s1.o = s->x1.s1.o ^ ROR32(s->x1.s1.o, 11);
+  t.x2.s1.e = s->x2.s1.e ^ ROR32(s->x2.s1.o, 2);
+  t.x2.s1.o = s->x2.s1.o ^ ROR32(s->x2.s1.e, 3);
+  t.x3.s1.e = s->x3.s1.e ^ ROR32(s->x3.s1.o, 3);
+  t.x3.s1.o = s->x3.s1.o ^ ROR32(s->x3.s1.e, 4);
+  t.x4.s1.e = s->x4.s1.e ^ ROR32(s->x4.s1.e, 17);
+  t.x4.s1.o = s->x4.s1.o ^ ROR32(s->x4.s1.o, 17);
+  s->x0.s1.e ^= ROR32(t.x0.s1.o, 9);
+  s->x0.s1.o ^= ROR32(t.x0.s1.e, 10);
+  s->x1.s1.e ^= ROR32(t.x1.s1.o, 19);
+  s->x1.s1.o ^= ROR32(t.x1.s1.e, 20);
+  s->x2.s1.e ^= t.x2.s1.o;
+  s->x2.s1.o ^= ROR32(t.x2.s1.e, 1);
+  s->x3.s1.e ^= ROR32(t.x3.s1.e, 5);
+  s->x3.s1.o ^= ROR32(t.x3.s1.o, 5);
+  s->x4.s1.e ^= ROR32(t.x4.s1.o, 3);
+  s->x4.s1.o ^= ROR32(t.x4.s1.e, 4);
+  t.x0.s0.e = s->x0.s0.e ^ ROR32(s->x0.s0.o, 4);
+  t.x0.s0.o = s->x0.s0.o ^ ROR32(s->x0.s0.e, 5);
+  t.x1.s0.e = s->x1.s0.e ^ ROR32(s->x1.s0.e, 11);
+  t.x1.s0.o = s->x1.s0.o ^ ROR32(s->x1.s0.o, 11);
+  t.x2.s0.e = s->x2.s0.e ^ ROR32(s->x2.s0.o, 2);
+  t.x2.s0.o = s->x2.s0.o ^ ROR32(s->x2.s0.e, 3);
+  t.x3.s0.e = s->x3.s0.e ^ ROR32(s->x3.s0.o, 3);
+  t.x3.s0.o = s->x3.s0.o ^ ROR32(s->x3.s0.e, 4);
+  t.x4.s0.e = s->x4.s0.e ^ ROR32(s->x4.s0.e, 17);
+  t.x4.s0.o = s->x4.s0.o ^ ROR32(s->x4.s0.o, 17);
+  s->x0.s0.e ^= ROR32(t.x0.s0.o, 9);
+  s->x0.s0.o ^= ROR32(t.x0.s0.e, 10);
+  s->x1.s0.e ^= ROR32(t.x1.s0.o, 19);
+  s->x1.s0.o ^= ROR32(t.x1.s0.e, 20);
+  s->x2.s0.e ^= t.x2.s0.o;
+  s->x2.s0.o ^= ROR32(t.x2.s0.e, 1);
+  s->x3.s0.e ^= ROR32(t.x3.s0.e, 5);
+  s->x3.s0.o ^= ROR32(t.x3.s0.o, 5);
+  s->x4.s0.e ^= ROR32(t.x4.s0.o, 3);
+  s->x4.s0.o ^= ROR32(t.x4.s0.e, 4);
+  printstate(" round output", s);
+}
+
+#endif /* ROUND_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/word.c

+#include "word.h"
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+share_t TOBI32(share_t in) {
+  uint32_t r0, r1;
+  uint32_t lo = in.e;
+  uint32_t hi = in.o;
+  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);
+  r0 = (lo & 0x0000FFFF) | (hi << 16);
+  r1 = (lo >> 16) | (hi & 0xFFFF0000);
+  in.e = r0;
+  in.o = r1;
+  return in;
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+share_t FROMBI32(share_t in) {
+  uint32_t r0 = in.e;
+  uint32_t r1 = in.o;
+  uint32_t lo = (r0 & 0x0000FFFF) | (r1 << 16);
+  uint32_t hi = (r0 >> 16) | (r1 & 0xFFFF0000);
+  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);
+  in.e = lo;
+  in.o = hi;
+  return in;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32_2shares/word.h

+#ifndef WORD_H_
+#define WORD_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "random.h"
+
+typedef struct {
+  uint32_t e;
+  uint32_t o;
+} share_t;
+
+typedef struct {
+  share_t s0;
+  share_t s1;
+} word_t;
+
+__forceinline word_t WORD_T(uint64_t x) {
+  word_t w;
+  w.s0.e = (uint32_t)x;
+  w.s0.o = x >> 32;
+  w.s1.e = 0;
+  w.s1.o = 0;
+  return w;
+}
+
+__forceinline uint64_t UINT64_T(word_t w) {
+  return (uint64_t)w.s0.o << 32 | w.s0.e;
+}
+
+share_t TOBI32(share_t in);
+
+share_t FROMBI32(share_t in);
+
+__forceinline word_t TOSHARES(uint64_t in) {
+  uint32_t r0 = rand32();
+  uint32_t r1 = rand32();
+  word_t w;
+  w.s0.e = (uint32_t)in ^ r0;
+  w.s0.o = (in >> 32) ^ r1;
+  w.s1.e = r0;
+  w.s1.o = r1;
+  return w;
+}
+
+__forceinline uint64_t FROMSHARES(word_t in) {
+  return (uint64_t)(in.s0.o ^ in.s1.o) << 32 | (in.s0.e ^ in.s1.e);
+}
+
+__forceinline word_t U64TOWORD(uint64_t x) {
+#if ASCON_MASK_LOADS
+  word_t w = TOSHARES(x);
+  w.s0 = TOBI32(w.s0);
+  w.s1 = TOBI32(w.s1);
+  return w;
+#else
+  word_t w = WORD_T(x);
+  w.s0 = TOBI32(w.s0);
+  return w;
+#endif
+}
+
+__forceinline uint64_t WORDTOU64(word_t w) {
+  w.s0 = FROMBI32(w.s0);
+  w.s1 = FROMBI32(w.s1);
+  return (uint64_t)FROMSHARES(w);
+}
+
+#define XOR(a, b)        \
+  do {                   \
+    word_t tb = b;       \
+    (a).s0.e ^= tb.s0.e; \
+    (a).s0.o ^= tb.s0.o; \
+    (a).s1.e ^= tb.s1.e; \
+    (a).s1.o ^= tb.s1.o; \
+  } while (0)
+
+#define AND(a, b)                                         \
+  do {                                                    \
+    word_t ta = a;                                        \
+    word_t tb = b;                                        \
+    (a).s0.e = (ta.s0.e & tb.s0.e) ^ (ta.s0.e & tb.s1.e); \
+    (a).s0.o = (ta.s0.o & tb.s0.e) ^ (ta.s0.o & tb.s1.o); \
+    (a).s1.e = (ta.s1.e & tb.s0.e) ^ (ta.s1.e & tb.s1.e); \
+    (a).s1.o = (ta.s1.o & tb.s0.o) ^ (ta.s1.o & tb.s1.o); \
+  } while (0)
+
+__forceinline uint32_t ROR32(uint32_t x, int n) {
+  return x >> n | x << (32 - n);
+}
+
+__forceinline word_t KEYROT(word_t lo2hi, word_t hi2lo) {
+  word_t r;
+  r.s0.e = lo2hi.s0.e << 16 | hi2lo.s0.e >> 16;
+  r.s0.o = lo2hi.s0.o << 16 | hi2lo.s0.o >> 16;
+  r.s1.e = lo2hi.s1.e << 16 | hi2lo.s1.e >> 16;
+  r.s1.o = lo2hi.s1.o << 16 | hi2lo.s1.o >> 16;
+  return r;
+}
+
+__forceinline int NOTZERO(word_t a, word_t b) {
+  int result = 0;
+  for (int i = 0; i < 8; ++i)
+    result |= ((uint8_t*)&(a.s0))[i] ^ ((uint8_t*)&(a.s1))[i];
+  for (int i = 0; i < 8; ++i)
+    result |= ((uint8_t*)&(b.s0))[i] ^ ((uint8_t*)&(b.s1))[i];
+  return result;
+}
+
+/* set padding byte in 64-bit Ascon word */
+__forceinline word_t PAD(int i) {
+  return WORD_T((uint64_t)(0x08 << (28 - 4 * i)) << 32);
+}
+
+/* byte mask for 64-bit Ascon word (1 <= n <= 8) */
+__forceinline word_t XMASK(int n) {
+  uint32_t mask = 0x0fffffff >> (n * 4 - 4);
+  return WORD_T((uint64_t)mask << 32 | mask);
+}
+
+#endif /* WORD_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/api.h

+#define CRYPTO_KEYBYTES 16
+#define CRYPTO_NSECBYTES 0
+#define CRYPTO_NPUBBYTES 16
+#define CRYPTO_ABYTES 16
+#define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/ascon.c

+#include "ascon.h"
+
+#include "api.h"
+#include "loadstore.h"
+#include "permutations.h"
+#include "printstate.h"
+
+__forceinline void loadkey(word_t* K0, word_t* K1, word_t* K2,
+                           const uint8_t* k) {
+  KINIT(K0, K1, K2);
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(*K0, KEYROT(WORD_T(0), LOAD(k, 4)));
+    k += 4;
+  }
+  XOR(*K1, LOAD64(k));
+  XOR(*K2, LOAD64(k + 8));
+}
+
+__forceinline void init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  word_t N0, N1;
+  word_t K0, K1, K2;
+  /* load nonce */
+  N0 = LOAD64(npub);
+  N1 = LOAD64(npub + 8);
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* initialization */
+  PINIT(s);
+  XOR(s->x0, IV);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x0, K0);
+  XOR(s->x1, K1);
+  XOR(s->x2, K2);
+  XOR(s->x3, N0);
+  XOR(s->x4, N1);
+  P12(s);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x2, K0);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("initialization", s);
+}
+
+__forceinline void absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  word_t* restrict px;
+  /* process associated data */
+  if (adlen) {
+    while (adlen >= ASCON_RATE) {
+      XOR(s->x0, LOAD64(ad));
+      if (ASCON_RATE == 16) XOR(s->x1, LOAD64(ad + 8));
+      PB(s);
+      ad += ASCON_RATE;
+      adlen -= ASCON_RATE;
+    }
+    /* final associated data block */
+    px = &s->x0;
+    if (ASCON_RATE == 16 && adlen >= 8) {
+      XOR(s->x0, LOAD64(ad));
+      px = &s->x1;
+      ad += 8;
+      adlen -= 8;
+    }
+    if (adlen) XOR(*px, LOAD(ad, adlen));
+    XOR(*px, PAD(adlen));
+    PB(s);
+  }
+  XOR(s->x4, WORD_T(1));
+  printstate("process associated data", s);
+}
+
+__forceinline void encrypt(state_t* s, uint8_t* c, const uint8_t* m,
+                           uint64_t mlen) {
+  word_t* restrict px;
+  /* process plaintext */
+  while (mlen >= ASCON_RATE) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    if (ASCON_RATE == 16) {
+      XOR(s->x1, LOAD64(m + 8));
+      STORE64(c + 8, s->x1);
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    mlen -= ASCON_RATE;
+  }
+  /* final plaintext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && mlen >= 8) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    mlen -= 8;
+  }
+  if (mlen) {
+    XOR(*px, LOAD(m, mlen));
+    STORE(c, *px, mlen);
+  }
+  XOR(*px, PAD(mlen));
+  printstate("process plaintext", s);
+}
+
+__forceinline void decrypt(state_t* s, uint8_t* m, const uint8_t* c,
+                           uint64_t clen) {
+  word_t* restrict px;
+  word_t cx;
+  /* process ciphertext */
+  while (clen >= ASCON_RATE) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    if (ASCON_RATE == 16) {
+      cx = LOAD64(c + 8);
+      XOR(s->x1, cx);
+      STORE64(m + 8, s->x1);
+      s->x1 = cx;
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    clen -= ASCON_RATE;
+  }
+  /* final ciphertext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && clen >= 8) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    clen -= 8;
+  }
+  if (clen) {
+    cx = LOAD(c, clen);
+    XOR(*px, cx);
+    STORE(m, *px, clen);
+    AND(*px, XMASK(clen));
+    XOR(*px, cx);
+  }
+  XOR(*px, PAD(clen));
+  printstate("process ciphertext", s);
+}
+
+__forceinline void final(state_t* s, const uint8_t* k) {
+  word_t K0, K1, K2;
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* finalization */
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 8) {
+    XOR(s->x1, K1);
+    XOR(s->x2, K2);
+  }
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 16) {
+    XOR(s->x2, K1);
+    XOR(s->x3, K2);
+  }
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(s->x1, KEYROT(K0, K1));
+    XOR(s->x2, KEYROT(K1, K2));
+    XOR(s->x3, KEYROT(K2, WORD_T(0)));
+  }
+  P12(s);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("finalization", s);
+}
+
+#if !ASCON_INLINE_MODE
+
+#define INIT ascon_init
+#define ABSORB ascon_absorb
+#define ENCRYPT ascon_encrypt
+#define DECRYPT ascon_decrypt
+#define FINAL ascon_final
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  init(s, npub, k);
+}
+
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  absorb(s, ad, adlen);
+}
+
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen) {
+  encrypt(s, c, m, mlen);
+}
+
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen) {
+  decrypt(s, m, c, clen);
+}
+
+void ascon_final(state_t* s, const uint8_t* k) { final(s, k); }
+
+#else
+
+#define INIT init
+#define ABSORB absorb
+#define ENCRYPT encrypt
+#define DECRYPT decrypt
+#define FINAL final
+
+#endif
+
+int crypto_aead_encrypt(uint8_t* c, uint64_t* clen, const uint8_t* m,
+                        uint64_t mlen, const uint8_t* ad, uint64_t adlen,
+                        const uint8_t* nsec, const uint8_t* npub,
+                        const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  *clen = mlen + CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  ENCRYPT(&s, c, m, mlen);
+  FINAL(&s, k);
+  /* set tag */
+  c += mlen;
+  STORE64(c, s.x3);
+  STORE64(c + 8, s.x4);
+  return 0;
+}
+
+int crypto_aead_decrypt(uint8_t* m, uint64_t* mlen, uint8_t* nsec,
+                        const uint8_t* c, uint64_t clen, const uint8_t* ad,
+                        uint64_t adlen, const uint8_t* npub, const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  if (clen < CRYPTO_ABYTES) {
+    *mlen = 0;
+    return -1;
+  }
+  *mlen = clen = clen - CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  DECRYPT(&s, m, c, clen);
+  FINAL(&s, k);
+  /* verify tag (should be constant time, check compiler output) */
+  c += clen;
+  XOR(s.x3, LOAD64(c));
+  XOR(s.x4, LOAD64(c + 8));
+  if (NOTZERO(s.x3, s.x4)) {
+    *mlen = 0;
+    return -1;
+  }
+  return 0;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/ascon.h

+#ifndef ASCON_H_
+#define ASCON_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "word.h"
+
+typedef struct {
+  word_t x0, x1, x2, x3, x4;
+  word_t rx;
+} state_t;
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k);
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen);
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen);
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen);
+void ascon_final(state_t* s, const uint8_t* k);
+
+#endif  // ASCON_H_

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/config.h

+#ifndef CONFIG_H_
+#define CONFIG_H_
+
+/* inline the Ascon mode */
+#ifndef ASCON_INLINE_MODE
+#define ASCON_INLINE_MODE 1
+#endif
+
+/* inline the Ascon permutations */
+#ifndef ASCON_INLINE_PERM
+#define ASCON_INLINE_PERM 0
+#endif
+
+/* single function for all permutations */
+#ifndef ASCON_SINGLE_PERM
+#define ASCON_SINGLE_PERM 0
+#endif
+
+/* unroll the permutation loops */
+#ifndef ASCON_UNROLL_LOOPS
+#define ASCON_UNROLL_LOOPS 0
+#endif
+
+/* Ascon data access option { 'W'ordwise, 'B'ytewise, 'H'ybrid, 'M'emcpy } */
+#ifndef ASCON_DATA_ACCESS
+#define ASCON_DATA_ACCESS 'B'
+#endif
+
+/* Ascon mask generator { 'S'tdlib, 'X'orshift, 'R'andombytes } */
+#ifndef ASCON_MASK_RNG
+#define ASCON_MASK_RNG 'X'
+#endif
+
+/* mask key/data loads */
+#ifndef ASCON_MASK_LOADS
+#define ASCON_MASK_LOADS 0
+#endif
+
+/* make sure __forceinline is supported */
+#ifndef __forceinline
+#define __forceinline inline __attribute__((always_inline))
+#endif
+
+#endif /* CONFIG_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/endian.h

+#ifndef ENDIAN_H_
+#define ENDIAN_H_
+
+#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+
+/* macros for big endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for big endian machines")
+#endif
+#define U64BIG(x) (x)
+#define U32BIG(x) (x)
+#define U16BIG(x) (x)
+
+#elif defined(_MSC_VER) || \
+    (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+
+/* macros for little endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for little endian machines")
+#endif
+#define U64BIG(x)                          \
+  (((0x00000000000000FFULL & (x)) << 56) | \
+   ((0x000000000000FF00ULL & (x)) << 40) | \
+   ((0x0000000000FF0000ULL & (x)) << 24) | \
+   ((0x00000000FF000000ULL & (x)) << 8) |  \
+   ((0x000000FF00000000ULL & (x)) >> 8) |  \
+   ((0x0000FF0000000000ULL & (x)) >> 24) | \
+   ((0x00FF000000000000ULL & (x)) >> 40) | \
+   ((0xFF00000000000000ULL & (x)) >> 56))
+#define U32BIG(x)                                           \
+  (((0x000000FF & (x)) << 24) | ((0x0000FF00 & (x)) << 8) | \
+   ((0x00FF0000 & (x)) >> 8) | ((0xFF000000 & (x)) >> 24))
+#define U16BIG(x) (((0x00FF & (x)) << 8) | ((0xFF00 & (x)) >> 8))
+
+#else
+#error "Ascon byte order macros not defined in endian.h"
+#endif
+
+#endif /* ENDIAN_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/implementors

+Christoph Dobraunig
+Martin Schläffer

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/loadstore.h

+#ifndef LOADSTORE_H_
+#define LOADSTORE_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "endian.h"
+#include "word.h"
+
+/* 64-bit LSB mask (undefined for n == 0) */
+#define MASK(n) (~0ull >> (64 - (n)))
+
+/* get byte from Ascon 64-bit word */
+#define GETBYTE(x, i) ((uint8_t)((uint64_t)(x) >> (56 - 8 * (i))))
+
+/* set byte in Ascon 64-bit word */
+#define SETBYTE(b, i) ((uint64_t)(b) << (56 - 8 * (i)))
+
+#if ASCON_DATA_ACCESS == 'W'
+
+#ifndef NDEBUG
+#pragma message("Using wordwise data access")
+#endif
+
+__forceinline word_t LOAD64(const uint8_t* bytes) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes);
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE64(uint8_t* bytes, word_t w) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes = U64BIG(x);
+}
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes & MASK(8 * n));
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes &= ~MASK(8 * n);
+  *(uint64_t*)bytes |= U64BIG(x);
+}
+
+#elif ASCON_DATA_ACCESS == 'M'
+
+#ifndef NDEBUG
+#pragma message("Using memcpy to access data")
+#endif
+
+#include <string.h>
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  memcpy((uint8_t*)&x, bytes, n);
+  return U64TOWORD(U64BIG(x));
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = U64BIG(WORDTOU64(w));
+  memcpy(bytes, (uint8_t*)&x, n);
+}
+
+#elif ASCON_DATA_ACCESS == 'B'
+
+#ifndef NDEBUG
+#pragma message("Using bytewise data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#elif ASCON_DATA_ACCESS == 'H'
+
+#ifndef NDEBUG
+#pragma message("Using hybrid data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  if (n == 8)
+    x = U64BIG(*(uint64_t*)bytes);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  if (n == 8)
+    *(uint64_t*)bytes = U64BIG(x);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#else
+#error "Ascon data access macro not defined correctly"
+#endif
+
+#endif /* LOADSTORE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/permutations.c

+#include "permutations.h"
+
+#include "round.h"
+
+#if !ASCON_UNROLL_LOOPS || ASCON_SINGLE_PERM
+
+const uint8_t constants[][2] = {{0xc, 0xc}, {0x9, 0xc}, {0xc, 0x9}, {0x9, 0x9},
+                                {0x6, 0xc}, {0x3, 0xc}, {0x6, 0x9}, {0x3, 0x9},
+                                {0xc, 0x6}, {0x9, 0x6}, {0xc, 0x3}, {0x9, 0x3}};
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+#elif ASCON_SINGLE_PERM
+
+void P(state_t* s, uint8_t rounds) {
+  printstate(" permutation input", s);
+  for (int i = START(rounds); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s) { P12ROUNDS(s); }
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 16
+void P8(state_t* s) { P8ROUNDS(s); }
+#endif
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 8
+void P6(state_t* s) { P6ROUNDS(s); }
+#endif
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/permutations.h

+#ifndef PERMUTATIONS_H_
+#define PERMUTATIONS_H_
+
+#include <stdint.h>
+
+#include "api.h"
+#include "ascon.h"
+#include "printstate.h"
+#include "round.h"
+
+#define ASCON_128_KEYBYTES 16
+#define ASCON_128A_KEYBYTES 16
+#define ASCON_80PQ_KEYBYTES 20
+
+#define ASCON_128_RATE 8
+#define ASCON_128A_RATE 16
+
+#define ASCON_128_PA_ROUNDS 12
+#define ASCON_128_PB_ROUNDS 6
+#define ASCON_128A_PB_ROUNDS 8
+
+#define ASCON_HASH_BYTES 32
+
+#define ASCON_128_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |     \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_128A_IV                                    \
+  U64TOWORD(((uint64_t)(ASCON_128_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128A_RATE * 8) << 48) |    \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |    \
+            ((uint64_t)(ASCON_128A_PB_ROUNDS) << 32))
+
+#define ASCON_80PQ_IV                                     \
+  U64TOWORD(((uint64_t)(ASCON_80PQ_KEYBYTES * 8) << 56) | \
+            ((uint64_t)(ASCON_128_RATE * 8) << 48) |      \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) |     \
+            ((uint64_t)(ASCON_128_PB_ROUNDS) << 32))
+
+#define ASCON_HASH_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) |  \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40) | \
+            ((uint64_t)(ASCON_HASH_BYTES * 8) << 0))
+
+#define ASCON_XOF_IV                                 \
+  U64TOWORD(((uint64_t)(ASCON_128_RATE * 8) << 48) | \
+            ((uint64_t)(ASCON_128_PA_ROUNDS) << 40))
+
+#define ASCON_HASH_IV0 U64TOWORD(0xee9398aadb67f03dull)
+#define ASCON_HASH_IV1 U64TOWORD(0x8bb21831c60f1002ull)
+#define ASCON_HASH_IV2 U64TOWORD(0xb48a92db98d5da62ull)
+#define ASCON_HASH_IV3 U64TOWORD(0x43189921b8f8e3e8ull)
+#define ASCON_HASH_IV4 U64TOWORD(0x348fa5c9d525e140ull)
+
+#define ASCON_XOF_IV0 U64TOWORD(0xb57e273b814cd416ull)
+#define ASCON_XOF_IV1 U64TOWORD(0x2b51042562ae2420ull)
+#define ASCON_XOF_IV2 U64TOWORD(0x66a3a7768ddf2218ull)
+#define ASCON_XOF_IV3 U64TOWORD(0x5aad0a7a8153650cull)
+#define ASCON_XOF_IV4 U64TOWORD(0x4f3e0e32539493b6ull)
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 16
+#define IV ASCON_128_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#if ASCON_RATE == 16
+#define IV ASCON_128A_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 8
+#define PB P8
+#endif
+
+#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 20
+#define IV ASCON_80PQ_IV
+#define PA_ROUNDS 12
+#define PB_ROUNDS 6
+#define PB P6
+#endif
+
+#define START(n) (12 - n)
+
+#if ASCON_UNROLL_LOOPS
+
+__forceinline void P12ROUNDS(state_t* s) {
+  ROUND(s, 0xc, 0xc);
+  ROUND(s, 0x9, 0xc);
+  ROUND(s, 0xc, 0x9);
+  ROUND(s, 0x9, 0x9);
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0xc);
+  ROUND(s, 0x3, 0xc);
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  ROUND(s, 0x6, 0x9);
+  ROUND(s, 0x3, 0x9);
+  ROUND(s, 0xc, 0x6);
+  ROUND(s, 0x9, 0x6);
+  ROUND(s, 0xc, 0x3);
+  ROUND(s, 0x9, 0x3);
+}
+
+#else /* !ASCON_UNROLL_LOOPS */
+
+extern const uint8_t constants[][2];
+
+__forceinline void P12ROUNDS(state_t* s) {
+  for (int i = START(12); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P8ROUNDS(state_t* s) {
+  for (int i = START(8); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+__forceinline void P6ROUNDS(state_t* s) {
+  for (int i = START(6); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+__forceinline void P12(state_t* s) {
+  printstate(" permutation input", s);
+  P12ROUNDS(s);
+}
+
+__forceinline void P8(state_t* s) {
+  printstate(" permutation input", s);
+  P8ROUNDS(s);
+}
+
+__forceinline void P6(state_t* s) {
+  printstate(" permutation input", s);
+  P6ROUNDS(s);
+}
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#elif ASCON_SINGLE_PERM
+
+#define P12(s) P(s, 12)
+#define P8(s) P(s, 8)
+#define P6(s) P(s, 6)
+
+void P(state_t* s, uint8_t rounds);
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s);
+void P8(state_t* s);
+void P6(state_t* s);
+
+__forceinline void P(state_t* s, int i) {
+  if (i == 12) P12(s);
+  if (i == 8) P8(s);
+  if (i == 6) P6(s);
+}
+
+#endif
+
+#endif /* PERMUTATIONS_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/printstate.h

+#ifndef PRINTSTATE_H_
+#define PRINTSTATE_H_
+
+#ifdef NDEBUG
+
+#define printword(text, w)
+#define printstate(text, s)
+
+#else
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "ascon.h"
+
+__forceinline void printword(const char* text, const word_t x) {
+  printf("%s=%016" PRIx64 "\n", text, WORDTOU64(x));
+}
+
+__forceinline void printstate(const char* text, const state_t* s) {
+  printf("%s:\n", text);
+  printword("  x0", s->x0);
+  printword("  x1", s->x1);
+  printword("  x2", s->x2);
+  printword("  x3", s->x3);
+  printword("  x4", s->x4);
+}
+
+#endif
+
+#endif /* PRINTSTATE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/random.c

+
+#include "random.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+#include "config.h"
+
+#if ASCON_MASK_RNG == 'R'
+
+void randinit() { srand(time(0)); }
+
+uint32_t rand32() {
+  uint32_t r;
+  randombytes(&r, 4);
+  return r;
+}
+
+uint64_t rand64() {
+  uint64_t r;
+  randombytes(&r, 8);
+  return r;
+}
+
+#elif ASCON_MASK_RNG == 'S'
+
+void randinit() { srand(time(0)); }
+
+uint32_t rand32() { return ((uint32_t)rand() << 21) ^ rand(); }
+
+uint64_t rand64() {
+  return ((uint64_t)rand() << 43) ^ ((uint64_t)rand() << 21) ^ rand();
+}
+
+#elif ASCON_MASK_RNG == 'X'
+
+uint32_t xorshift32;
+uint64_t xorshift64;
+
+void randinit() {
+  srand(time(0));
+  xorshift32 = rand();
+  xorshift64 = (uint64_t)rand() << 32 | rand();
+}
+
+uint32_t rand32() {
+  uint32_t x = xorshift32;
+  x ^= x << 13;
+  x ^= x >> 17;
+  x ^= x << 5;
+  return xorshift32 = x;
+}
+
+uint64_t rand64() {
+  uint64_t x = xorshift64;
+  x ^= x << 13;
+  x ^= x >> 7;
+  x ^= x << 17;
+  return xorshift64 = x;
+}
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/random.h

+#ifndef RANDOM_H_
+#define RANDOM_H_
+
+#include <stdint.h>
+
+void randinit();
+uint32_t rand32();
+uint64_t rand64();
+
+#endif /* RANDOM_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/round.h

+#ifndef ROUND_H_
+#define ROUND_H_
+
+#include "ascon.h"
+#include "printstate.h"
+#include "random.h"
+
+__forceinline void KINIT(word_t* K0, word_t* K1, word_t* K2) {
+  *K0 = TOSHARES(0);
+  *K1 = TOSHARES(0);
+  *K2 = TOSHARES(0);
+}
+
+__forceinline void PINIT(state_t* s) {
+  randinit();
+  s->x0 = TOSHARES(0);
+  s->x1 = TOSHARES(0);
+  s->x2 = TOSHARES(0);
+  s->x3 = TOSHARES(0);
+  s->x4 = TOSHARES(0);
+  s->rx = TOSHARES(0);
+}
+
+#define TOFFOLI(a0, a1, a2, b0, b1, b2, c0, c1, c2) \
+  do {                                              \
+    (a0) ^= (~(b0)) & (c0);                         \
+    (a0) ^= (b0) & (c2);                            \
+    (a0) ^= (b2) & (c0);                            \
+    (a1) ^= (~(b1)) & (c1);                         \
+    (a1) ^= (b1) & (c0);                            \
+    (a1) ^= (b0) & (c1);                            \
+    (a2) ^= (~(b2)) & (c2);                         \
+    (a2) ^= (b2) & (c1);                            \
+    (a2) ^= (b1) & (c2);                            \
+  } while (0)
+
+__forceinline void ROUND(state_t* s, uint32_t C_e, uint32_t C_o) {
+  state_t t;
+  /* refresh randomness */
+  /* s->rx = TOSHARES(0); */
+  /* addition of round constant */
+  s->x2.s0.e ^= C_e;
+  /* substitution layer */
+  s->x0.s0.e ^= s->x4.s0.e;
+  s->x4.s0.e ^= s->x3.s0.e;
+  s->x2.s0.e ^= s->x1.s0.e;
+  s->x0.s1.e ^= s->x4.s1.e;
+  s->x4.s1.e ^= s->x3.s1.e;
+  s->x2.s1.e ^= s->x1.s1.e;
+  s->x0.s2.e ^= s->x4.s2.e;
+  s->x4.s2.e ^= s->x3.s2.e;
+  s->x2.s2.e ^= s->x1.s2.e;
+  /* start of shared keccak s-box from https://eprint.iacr.org/2019/536 */
+  s->rx.s2.e = s->rx.s0.e;
+  s->rx.s0.e ^= s->rx.s1.e;
+  TOFFOLI(s->rx.s0.e, s->rx.s1.e, s->rx.s2.e, s->x4.s0.e, s->x4.s1.e,
+          s->x4.s2.e, s->x0.s0.e, s->x0.s1.e, s->x0.s2.e);
+  TOFFOLI(s->x0.s0.e, s->x0.s1.e, s->x0.s2.e, s->x1.s0.e, s->x1.s1.e,
+          s->x1.s2.e, s->x2.s0.e, s->x2.s1.e, s->x2.s2.e);
+  TOFFOLI(s->x2.s0.e, s->x2.s1.e, s->x2.s2.e, s->x3.s0.e, s->x3.s1.e,
+          s->x3.s2.e, s->x4.s0.e, s->x4.s1.e, s->x4.s2.e);
+  TOFFOLI(s->x4.s0.e, s->x4.s1.e, s->x4.s2.e, s->x0.s0.e, s->x0.s1.e,
+          s->x0.s2.e, s->x1.s0.e, s->x1.s1.e, s->x1.s2.e);
+  TOFFOLI(s->x1.s0.e, s->x1.s1.e, s->x1.s2.e, s->x2.s0.e, s->x2.s1.e,
+          s->x2.s2.e, s->x3.s0.e, s->x3.s1.e, s->x3.s2.e);
+  s->x3.s2.e ^= s->rx.s2.e;
+  s->x3.s1.e ^= s->rx.s1.e;
+  s->x3.s0.e ^= s->rx.s0.e;
+  /* end of shared keccak s-box */
+  s->x1.s0.e ^= s->x0.s0.e;
+  s->x0.s0.e ^= s->x4.s0.e;
+  s->x3.s0.e ^= s->x2.s0.e;
+  s->x2.s0.e = ~s->x2.s0.e;
+  s->x1.s1.e ^= s->x0.s1.e;
+  s->x0.s1.e ^= s->x4.s1.e;
+  s->x3.s1.e ^= s->x2.s1.e;
+  s->x1.s2.e ^= s->x0.s2.e;
+  s->x0.s2.e ^= s->x4.s2.e;
+  s->x3.s2.e ^= s->x2.s2.e;
+  /* addition of round constant */
+  s->x2.s0.o ^= C_o;
+  /* substitution layer */
+  s->x0.s0.o ^= s->x4.s0.o;
+  s->x4.s0.o ^= s->x3.s0.o;
+  s->x2.s0.o ^= s->x1.s0.o;
+  s->x0.s1.o ^= s->x4.s1.o;
+  s->x4.s1.o ^= s->x3.s1.o;
+  s->x2.s1.o ^= s->x1.s1.o;
+  s->x0.s2.o ^= s->x4.s2.o;
+  s->x4.s2.o ^= s->x3.s2.o;
+  s->x2.s2.o ^= s->x1.s2.o;
+  /* start of shared keccak s-box from https://eprint.iacr.org/2019/536 */
+  s->rx.s2.o = s->rx.s0.o;
+  s->rx.s0.o ^= s->rx.s1.o;
+  TOFFOLI(s->rx.s0.o, s->rx.s1.o, s->rx.s2.o, s->x4.s0.o, s->x4.s1.o,
+          s->x4.s2.o, s->x0.s0.o, s->x0.s1.o, s->x0.s2.o);
+  TOFFOLI(s->x0.s0.o, s->x0.s1.o, s->x0.s2.o, s->x1.s0.o, s->x1.s1.o,
+          s->x1.s2.o, s->x2.s0.o, s->x2.s1.o, s->x2.s2.o);
+  TOFFOLI(s->x2.s0.o, s->x2.s1.o, s->x2.s2.o, s->x3.s0.o, s->x3.s1.o,
+          s->x3.s2.o, s->x4.s0.o, s->x4.s1.o, s->x4.s2.o);
+  TOFFOLI(s->x4.s0.o, s->x4.s1.o, s->x4.s2.o, s->x0.s0.o, s->x0.s1.o,
+          s->x0.s2.o, s->x1.s0.o, s->x1.s1.o, s->x1.s2.o);
+  TOFFOLI(s->x1.s0.o, s->x1.s1.o, s->x1.s2.o, s->x2.s0.o, s->x2.s1.o,
+          s->x2.s2.o, s->x3.s0.o, s->x3.s1.o, s->x3.s2.o);
+  s->x3.s2.o ^= s->rx.s2.o;
+  s->x3.s1.o ^= s->rx.s1.o;
+  s->x3.s0.o ^= s->rx.s0.o;
+  /* end of shared keccak s-box */
+  s->x1.s0.o ^= s->x0.s0.o;
+  s->x0.s0.o ^= s->x4.s0.o;
+  s->x3.s0.o ^= s->x2.s0.o;
+  s->x2.s0.o = ~s->x2.s0.o;
+  s->x1.s1.o ^= s->x0.s1.o;
+  s->x0.s1.o ^= s->x4.s1.o;
+  s->x3.s1.o ^= s->x2.s1.o;
+  s->x1.s2.o ^= s->x0.s2.o;
+  s->x0.s2.o ^= s->x4.s2.o;
+  s->x3.s2.o ^= s->x2.s2.o;
+  /* linear diffusion layer */
+  t.x0.s2.e = s->x0.s2.e ^ ROR32(s->x0.s2.o, 4);
+  t.x0.s2.o = s->x0.s2.o ^ ROR32(s->x0.s2.e, 5);
+  t.x1.s2.e = s->x1.s2.e ^ ROR32(s->x1.s2.e, 11);
+  t.x1.s2.o = s->x1.s2.o ^ ROR32(s->x1.s2.o, 11);
+  t.x2.s2.e = s->x2.s2.e ^ ROR32(s->x2.s2.o, 2);
+  t.x2.s2.o = s->x2.s2.o ^ ROR32(s->x2.s2.e, 3);
+  t.x3.s2.e = s->x3.s2.e ^ ROR32(s->x3.s2.o, 3);
+  t.x3.s2.o = s->x3.s2.o ^ ROR32(s->x3.s2.e, 4);
+  t.x4.s2.e = s->x4.s2.e ^ ROR32(s->x4.s2.e, 17);
+  t.x4.s2.o = s->x4.s2.o ^ ROR32(s->x4.s2.o, 17);
+  s->x0.s2.e ^= ROR32(t.x0.s2.o, 9);
+  s->x0.s2.o ^= ROR32(t.x0.s2.e, 10);
+  s->x1.s2.e ^= ROR32(t.x1.s2.o, 19);
+  s->x1.s2.o ^= ROR32(t.x1.s2.e, 20);
+  s->x2.s2.e ^= t.x2.s2.o;
+  s->x2.s2.o ^= ROR32(t.x2.s2.e, 1);
+  s->x3.s2.e ^= ROR32(t.x3.s2.e, 5);
+  s->x3.s2.o ^= ROR32(t.x3.s2.o, 5);
+  s->x4.s2.e ^= ROR32(t.x4.s2.o, 3);
+  s->x4.s2.o ^= ROR32(t.x4.s2.e, 4);
+  t.x0.s1.e = s->x0.s1.e ^ ROR32(s->x0.s1.o, 4);
+  t.x0.s1.o = s->x0.s1.o ^ ROR32(s->x0.s1.e, 5);
+  t.x1.s1.e = s->x1.s1.e ^ ROR32(s->x1.s1.e, 11);
+  t.x1.s1.o = s->x1.s1.o ^ ROR32(s->x1.s1.o, 11);
+  t.x2.s1.e = s->x2.s1.e ^ ROR32(s->x2.s1.o, 2);
+  t.x2.s1.o = s->x2.s1.o ^ ROR32(s->x2.s1.e, 3);
+  t.x3.s1.e = s->x3.s1.e ^ ROR32(s->x3.s1.o, 3);
+  t.x3.s1.o = s->x3.s1.o ^ ROR32(s->x3.s1.e, 4);
+  t.x4.s1.e = s->x4.s1.e ^ ROR32(s->x4.s1.e, 17);
+  t.x4.s1.o = s->x4.s1.o ^ ROR32(s->x4.s1.o, 17);
+  s->x0.s1.e ^= ROR32(t.x0.s1.o, 9);
+  s->x0.s1.o ^= ROR32(t.x0.s1.e, 10);
+  s->x1.s1.e ^= ROR32(t.x1.s1.o, 19);
+  s->x1.s1.o ^= ROR32(t.x1.s1.e, 20);
+  s->x2.s1.e ^= t.x2.s1.o;
+  s->x2.s1.o ^= ROR32(t.x2.s1.e, 1);
+  s->x3.s1.e ^= ROR32(t.x3.s1.e, 5);
+  s->x3.s1.o ^= ROR32(t.x3.s1.o, 5);
+  s->x4.s1.e ^= ROR32(t.x4.s1.o, 3);
+  s->x4.s1.o ^= ROR32(t.x4.s1.e, 4);
+  t.x0.s0.e = s->x0.s0.e ^ ROR32(s->x0.s0.o, 4);
+  t.x0.s0.o = s->x0.s0.o ^ ROR32(s->x0.s0.e, 5);
+  t.x1.s0.e = s->x1.s0.e ^ ROR32(s->x1.s0.e, 11);
+  t.x1.s0.o = s->x1.s0.o ^ ROR32(s->x1.s0.o, 11);
+  t.x2.s0.e = s->x2.s0.e ^ ROR32(s->x2.s0.o, 2);
+  t.x2.s0.o = s->x2.s0.o ^ ROR32(s->x2.s0.e, 3);
+  t.x3.s0.e = s->x3.s0.e ^ ROR32(s->x3.s0.o, 3);
+  t.x3.s0.o = s->x3.s0.o ^ ROR32(s->x3.s0.e, 4);
+  t.x4.s0.e = s->x4.s0.e ^ ROR32(s->x4.s0.e, 17);
+  t.x4.s0.o = s->x4.s0.o ^ ROR32(s->x4.s0.o, 17);
+  s->x0.s0.e ^= ROR32(t.x0.s0.o, 9);
+  s->x0.s0.o ^= ROR32(t.x0.s0.e, 10);
+  s->x1.s0.e ^= ROR32(t.x1.s0.o, 19);
+  s->x1.s0.o ^= ROR32(t.x1.s0.e, 20);
+  s->x2.s0.e ^= t.x2.s0.o;
+  s->x2.s0.o ^= ROR32(t.x2.s0.e, 1);
+  s->x3.s0.e ^= ROR32(t.x3.s0.e, 5);
+  s->x3.s0.o ^= ROR32(t.x3.s0.o, 5);
+  s->x4.s0.e ^= ROR32(t.x4.s0.o, 3);
+  s->x4.s0.o ^= ROR32(t.x4.s0.e, 4);
+  printstate(" round output", s);
+}
+
+#endif /* ROUND_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/word.c

+#include "word.h"
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+share_t TOBI32(share_t in) {
+  uint32_t r0, r1;
+  uint32_t lo = in.e;
+  uint32_t hi = in.o;
+  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);
+  r0 = (lo & 0x0000FFFF) | (hi << 16);
+  r1 = (lo >> 16) | (hi & 0xFFFF0000);
+  in.e = r0;
+  in.o = r1;
+  return in;
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+share_t FROMBI32(share_t in) {
+  uint32_t r0 = in.e;
+  uint32_t r1 = in.o;
+  uint32_t lo = (r0 & 0x0000FFFF) | (r1 << 16);
+  uint32_t hi = (r0 >> 16) | (r1 & 0xFFFF0000);
+  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);
+  in.e = lo;
+  in.o = hi;
+  return in;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32_3shares/word.h

+#ifndef WORD_H_
+#define WORD_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "random.h"
+
+typedef struct {
+  uint32_t e;
+  uint32_t o;
+} share_t;
+
+typedef struct {
+  share_t s0;
+  share_t s1;
+  share_t s2;
+} word_t;
+
+__forceinline word_t WORD_T(uint64_t x) {
+  word_t w;
+  w.s0.e = (uint32_t)x;
+  w.s0.o = x >> 32;
+  w.s1.e = 0;
+  w.s1.o = 0;
+  w.s2.e = 0;
+  w.s2.o = 0;
+  return w;
+}
+
+__forceinline uint64_t UINT64_T(word_t w) {
+  return (uint64_t)w.s0.o << 32 | w.s0.e;
+}
+
+share_t TOBI32(share_t in);
+
+share_t FROMBI32(share_t in);
+
+__forceinline word_t TOSHARES(uint64_t in) {
+  uint32_t r0 = rand32();
+  uint32_t r1 = rand32();
+  uint32_t r2 = rand32();
+  uint32_t r3 = rand32();
+  word_t w;
+  w.s0.e = (uint32_t)in ^ r0 ^ r2;
+  w.s0.o = (in >> 32) ^ r1 ^ r3;
+  w.s1.e = r0;
+  w.s1.o = r1;
+  w.s2.e = r2;
+  w.s2.o = r3;
+  return w;
+}
+
+__forceinline uint64_t FROMSHARES(word_t in) {
+  return (uint64_t)(in.s0.o ^ in.s1.o ^ in.s2.o) << 32 |
+         (in.s0.e ^ in.s1.e ^ in.s2.e);
+}
+
+__forceinline word_t U64TOWORD(uint64_t x) {
+#if ASCON_MASK_LOADS
+  word_t w = TOSHARES(x);
+  w.s0 = TOBI32(w.s0);
+  w.s1 = TOBI32(w.s1);
+  w.s2 = TOBI32(w.s2);
+  return w;
+#else
+  word_t w = WORD_T(x);
+  w.s0 = TOBI32(w.s0);
+  return w;
+#endif
+}
+
+__forceinline uint64_t WORDTOU64(word_t w) {
+  w.s0 = FROMBI32(w.s0);
+  w.s1 = FROMBI32(w.s1);
+  w.s2 = FROMBI32(w.s2);
+  return (uint64_t)FROMSHARES(w);
+}
+
+#define XOR(a, b)        \
+  do {                   \
+    word_t tb = b;       \
+    (a).s0.e ^= tb.s0.e; \
+    (a).s0.o ^= tb.s0.o; \
+    (a).s1.e ^= tb.s1.e; \
+    (a).s1.o ^= tb.s1.o; \
+    (a).s2.e ^= tb.s2.e; \
+    (a).s2.o ^= tb.s2.o; \
+  } while (0)
+
+#define AND(a, b)                                                        \
+  do {                                                                   \
+    word_t ta = a;                                                       \
+    word_t tb = b;                                                       \
+    (a).s0.e =                                                           \
+        (ta.s0.e & tb.s0.e) ^ (ta.s0.e & tb.s1.e) ^ (ta.s0.e & tb.s2.e); \
+    (a).s0.o =                                                           \
+        (ta.s0.o & tb.s0.o) ^ (ta.s0.o & tb.s1.o) ^ (ta.s0.o & tb.s2.o); \
+    (a).s1.e =                                                           \
+        (ta.s1.e & tb.s0.e) ^ (ta.s1.e & tb.s1.e) ^ (ta.s1.e & tb.s2.e); \
+    (a).s1.o =                                                           \
+        (ta.s1.o & tb.s0.o) ^ (ta.s1.o & tb.s1.o) ^ (ta.s1.o & tb.s2.o); \
+    (a).s2.e =                                                           \
+        (ta.s2.e & tb.s0.e) ^ (ta.s2.e & tb.s1.e) ^ (ta.s2.e & tb.s2.e); \
+    (a).s2.o =                                                           \
+        (ta.s2.o & tb.s0.o) ^ (ta.s2.o & tb.s1.o) ^ (ta.s2.o & tb.s2.o); \
+  } while (0)
+
+__forceinline uint32_t ROR32(uint32_t x, int n) {
+  return x >> n | x << (32 - n);
+}
+
+__forceinline word_t KEYROT(word_t lo2hi, word_t hi2lo) {
+  word_t r;
+  r.s0.e = lo2hi.s0.e << 16 | hi2lo.s0.e >> 16;
+  r.s0.o = lo2hi.s0.o << 16 | hi2lo.s0.o >> 16;
+  r.s1.e = lo2hi.s1.e << 16 | hi2lo.s1.e >> 16;
+  r.s1.o = lo2hi.s1.o << 16 | hi2lo.s1.o >> 16;
+  r.s2.e = lo2hi.s2.e << 16 | hi2lo.s2.e >> 16;
+  r.s2.o = lo2hi.s2.o << 16 | hi2lo.s2.o >> 16;
+  return r;
+}
+
+__forceinline int NOTZERO(word_t a, word_t b) {
+  int result = 0;
+  for (int i = 0; i < 8; ++i)
+    result |= ((uint8_t*)&(a.s0))[i] ^ ((uint8_t*)&(a.s1))[i] ^
+              ((uint8_t*)&(a.s2))[i];
+  for (int i = 0; i < 8; ++i)
+    result |= ((uint8_t*)&(b.s0))[i] ^ ((uint8_t*)&(b.s1))[i] ^
+              ((uint8_t*)&(b.s2))[i];
+  return result;
+}
+
+/* set padding byte in 64-bit Ascon word */
+__forceinline word_t PAD(int i) {
+  return WORD_T((uint64_t)(0x08 << (28 - 4 * i)) << 32);
+}
+
+/* byte mask for 64-bit Ascon word (1 <= n <= 8) */
+__forceinline word_t XMASK(int n) {
+  uint32_t mask = 0x0fffffff >> (n * 4 - 4);
+  return WORD_T((uint64_t)mask << 32 | mask);
+}
+
+#endif /* WORD_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/api.h

@@ -3,3 +3,4 @@
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
 #define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/ascon.c

+#include "ascon.h"
+
+#include "api.h"
+#include "loadstore.h"
+#include "permutations.h"
+#include "printstate.h"
+
+__forceinline void loadkey(word_t* K0, word_t* K1, word_t* K2,
+                           const uint8_t* k) {
+  KINIT(K0, K1, K2);
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(*K0, KEYROT(WORD_T(0), LOAD(k, 4)));
+    k += 4;
+  }
+  XOR(*K1, LOAD64(k));
+  XOR(*K2, LOAD64(k + 8));
+}
+
+__forceinline void init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  word_t N0, N1;
+  word_t K0, K1, K2;
+  /* load nonce */
+  N0 = LOAD64(npub);
+  N1 = LOAD64(npub + 8);
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* initialization */
+  PINIT(s);
+  XOR(s->x0, IV);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x0, K0);
+  XOR(s->x1, K1);
+  XOR(s->x2, K2);
+  XOR(s->x3, N0);
+  XOR(s->x4, N1);
+  P12(s);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x2, K0);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("initialization", s);
+}
+
+__forceinline void absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  word_t* restrict px;
+  /* process associated data */
+  if (adlen) {
+    while (adlen >= ASCON_RATE) {
+      XOR(s->x0, LOAD64(ad));
+      if (ASCON_RATE == 16) XOR(s->x1, LOAD64(ad + 8));
+      PB(s);
+      ad += ASCON_RATE;
+      adlen -= ASCON_RATE;
+    }
+    /* final associated data block */
+    px = &s->x0;
+    if (ASCON_RATE == 16 && adlen >= 8) {
+      XOR(s->x0, LOAD64(ad));
+      px = &s->x1;
+      ad += 8;
+      adlen -= 8;
+    }
+    if (adlen) XOR(*px, LOAD(ad, adlen));
+    XOR(*px, PAD(adlen));
+    PB(s);
+  }
+  XOR(s->x4, WORD_T(1));
+  printstate("process associated data", s);
+}
+
+__forceinline void encrypt(state_t* s, uint8_t* c, const uint8_t* m,
+                           uint64_t mlen) {
+  word_t* restrict px;
+  /* process plaintext */
+  while (mlen >= ASCON_RATE) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    if (ASCON_RATE == 16) {
+      XOR(s->x1, LOAD64(m + 8));
+      STORE64(c + 8, s->x1);
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    mlen -= ASCON_RATE;
+  }
+  /* final plaintext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && mlen >= 8) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    mlen -= 8;
+  }
+  if (mlen) {
+    XOR(*px, LOAD(m, mlen));
+    STORE(c, *px, mlen);
+  }
+  XOR(*px, PAD(mlen));
+  printstate("process plaintext", s);
+}
+
+__forceinline void decrypt(state_t* s, uint8_t* m, const uint8_t* c,
+                           uint64_t clen) {
+  word_t* restrict px;
+  word_t cx;
+  /* process ciphertext */
+  while (clen >= ASCON_RATE) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    if (ASCON_RATE == 16) {
+      cx = LOAD64(c + 8);
+      XOR(s->x1, cx);
+      STORE64(m + 8, s->x1);
+      s->x1 = cx;
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    clen -= ASCON_RATE;
+  }
+  /* final ciphertext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && clen >= 8) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    clen -= 8;
+  }
+  if (clen) {
+    cx = LOAD(c, clen);
+    XOR(*px, cx);
+    STORE(m, *px, clen);
+    AND(*px, XMASK(clen));
+    XOR(*px, cx);
+  }
+  XOR(*px, PAD(clen));
+  printstate("process ciphertext", s);
+}
+
+__forceinline void final(state_t* s, const uint8_t* k) {
+  word_t K0, K1, K2;
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* finalization */
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 8) {
+    XOR(s->x1, K1);
+    XOR(s->x2, K2);
+  }
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 16) {
+    XOR(s->x2, K1);
+    XOR(s->x3, K2);
+  }
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(s->x1, KEYROT(K0, K1));
+    XOR(s->x2, KEYROT(K1, K2));
+    XOR(s->x3, KEYROT(K2, WORD_T(0)));
+  }
+  P12(s);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("finalization", s);
+}
+
+#if !ASCON_INLINE_MODE
+
+#define INIT ascon_init
+#define ABSORB ascon_absorb
+#define ENCRYPT ascon_encrypt
+#define DECRYPT ascon_decrypt
+#define FINAL ascon_final
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  init(s, npub, k);
+}
+
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  absorb(s, ad, adlen);
+}
+
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen) {
+  encrypt(s, c, m, mlen);
+}
+
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen) {
+  decrypt(s, m, c, clen);
+}
+
+void ascon_final(state_t* s, const uint8_t* k) { final(s, k); }
+
+#else
+
+#define INIT init
+#define ABSORB absorb
+#define ENCRYPT encrypt
+#define DECRYPT decrypt
+#define FINAL final
+
+#endif
+
+int crypto_aead_encrypt(uint8_t* c, uint64_t* clen, const uint8_t* m,
+                        uint64_t mlen, const uint8_t* ad, uint64_t adlen,
+                        const uint8_t* nsec, const uint8_t* npub,
+                        const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  *clen = mlen + CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  ENCRYPT(&s, c, m, mlen);
+  FINAL(&s, k);
+  /* set tag */
+  c += mlen;
+  STORE64(c, s.x3);
+  STORE64(c + 8, s.x4);
+  return 0;
+}
+
+int crypto_aead_decrypt(uint8_t* m, uint64_t* mlen, uint8_t* nsec,
+                        const uint8_t* c, uint64_t clen, const uint8_t* ad,
+                        uint64_t adlen, const uint8_t* npub, const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  if (clen < CRYPTO_ABYTES) {
+    *mlen = 0;
+    return -1;
+  }
+  *mlen = clen = clen - CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  DECRYPT(&s, m, c, clen);
+  FINAL(&s, k);
+  /* verify tag (should be constant time, check compiler output) */
+  c += clen;
+  XOR(s.x3, LOAD64(c));
+  XOR(s.x4, LOAD64(c + 8));
+  if (NOTZERO(s.x3, s.x4)) {
+    *mlen = 0;
+    return -1;
+  }
+  return 0;
+}

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/ascon.h

+#ifndef ASCON_H_
+#define ASCON_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "word.h"
+
+typedef struct {
+  word_t x0, x1, x2, x3, x4;
+} state_t;
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k);
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen);
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen);
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen);
+void ascon_final(state_t* s, const uint8_t* k);
+
+#endif  // ASCON_H_

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/config.h

+#ifndef CONFIG_H_
+#define CONFIG_H_
+
+/* inline the Ascon mode */
+#ifndef ASCON_INLINE_MODE
+#define ASCON_INLINE_MODE 1
+#endif
+
+/* inline the Ascon permutations */
+#ifndef ASCON_INLINE_PERM
+#define ASCON_INLINE_PERM 0
+#endif
+
+/* single function for all permutations */
+#ifndef ASCON_SINGLE_PERM
+#define ASCON_SINGLE_PERM 0
+#endif
+
+/* unroll the permutation loops */
+#ifndef ASCON_UNROLL_LOOPS
+#define ASCON_UNROLL_LOOPS 1
+#endif
+
+/* Ascon data access option { 'W'ordwise, 'B'ytewise, 'H'ybrid, 'M'emcpy } */
+#ifndef ASCON_DATA_ACCESS
+#define ASCON_DATA_ACCESS 'H'
+#endif
+
+/* make sure __forceinline is supported */
+#ifndef __forceinline
+#define __forceinline inline __attribute__((always_inline))
+#endif
+
+#endif /* CONFIG_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/endian.h

@@ -3,7 +3,10 @@
 
 
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 #if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 
 
-// macros for big endian machines
+/* macros for big endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for big endian machines")
+#endif
 #define U64BIG(x) (x)
 #define U64BIG(x) (x)
 #define U32BIG(x) (x)
 #define U32BIG(x) (x)
 #define U16BIG(x) (x)
 #define U16BIG(x) (x)
@@ -11,21 +14,26 @@
 #elif defined(_MSC_VER) || \
 #elif defined(_MSC_VER) || \
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
 
 
-// macros for little endian machines
+/* macros for little endian machines */
+#ifndef NDEBUG
+#pragma message("Using macros for little endian machines")
+#endif
 #define U64BIG(x)                          \
 #define U64BIG(x)                          \
-  ((((x) & 0x00000000000000FFULL) << 56) | (((x) & 0x000000000000FF00ULL) << 40) | \
-   (((x) & 0x0000000000FF0000ULL) << 24) | (((x) & 0x00000000FF000000ULL) << 8) |  \
-   (((x) & 0x000000FF00000000ULL) >> 8) | (((x) & 0x0000FF0000000000ULL) >> 24) |  \
-   (((x) & 0x00FF000000000000ULL) >> 40) | (((x) & 0xFF00000000000000ULL) >> 56))
+  (((0x00000000000000FFULL & (x)) << 56) | \
+   ((0x000000000000FF00ULL & (x)) << 40) | \
+   ((0x0000000000FF0000ULL & (x)) << 24) | \
+   ((0x00000000FF000000ULL & (x)) << 8) |  \
+   ((0x000000FF00000000ULL & (x)) >> 8) |  \
+   ((0x0000FF0000000000ULL & (x)) >> 24) | \
+   ((0x00FF000000000000ULL & (x)) >> 40) | \
+   ((0xFF00000000000000ULL & (x)) >> 56))
 #define U32BIG(x)                                           \
 #define U32BIG(x)                                           \
-  ((((x) & 0x000000FF) << 24) | (((x) & 0x0000FF00) << 8) | \
-   (((x) & 0x00FF0000) >> 8) | (((x) & 0xFF000000) >> 24))
-#define U16BIG(x)                                 \
-  ((((x) & 0x00FF) << 8) | (((x) & 0xFF00) >> 8))
+  (((0x000000FF & (x)) << 24) | ((0x0000FF00 & (x)) << 8) | \
+   ((0x00FF0000 & (x)) >> 8) | ((0xFF000000 & (x)) >> 24))
+#define U16BIG(x) (((0x00FF & (x)) << 8) | ((0xFF00 & (x)) >> 8))
 
 
 #else
 #else
-#error "ascon byte order macros not defined in endian.h"
+#error "Ascon byte order macros not defined in endian.h"
 #endif
 #endif
 
 
-#endif  // ENDIAN_H_
-
+#endif /* ENDIAN_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/loadstore.h

+#ifndef LOADSTORE_H_
+#define LOADSTORE_H_
+
+#include <stdint.h>
+
+#include "config.h"
+#include "endian.h"
+#include "word.h"
+
+/* 64-bit LSB mask (undefined for n == 0) */
+#define MASK(n) (~0ull >> (64 - (n)))
+
+/* get byte from Ascon 64-bit word */
+#define GETBYTE(x, i) ((uint8_t)((uint64_t)(x) >> (56 - 8 * (i))))
+
+/* set byte in Ascon 64-bit word */
+#define SETBYTE(b, i) ((uint64_t)(b) << (56 - 8 * (i)))
+
+#if ASCON_DATA_ACCESS == 'W'
+
+#ifndef NDEBUG
+#pragma message("Using wordwise data access")
+#endif
+
+__forceinline word_t LOAD64(const uint8_t* bytes) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes);
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE64(uint8_t* bytes, word_t w) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes = U64BIG(x);
+}
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = U64BIG(*(uint64_t*)bytes & MASK(8 * n));
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  *(uint64_t*)bytes &= ~MASK(8 * n);
+  *(uint64_t*)bytes |= U64BIG(x);
+}
+
+#elif ASCON_DATA_ACCESS == 'M'
+
+#ifndef NDEBUG
+#pragma message("Using memcpy to access data")
+#endif
+
+#include <string.h>
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  memcpy((uint8_t*)&x, bytes, n);
+  return U64TOWORD(U64BIG(x));
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = U64BIG(WORDTOU64(w));
+  memcpy(bytes, (uint8_t*)&x, n);
+}
+
+#elif ASCON_DATA_ACCESS == 'B'
+
+#ifndef NDEBUG
+#pragma message("Using bytewise data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#elif ASCON_DATA_ACCESS == 'H'
+
+#ifndef NDEBUG
+#pragma message("Using hybrid data access")
+#endif
+
+#define LOAD64(bytes) LOAD(bytes, 8)
+#define STORE64(bytes, w) STORE(bytes, w, 8)
+
+__forceinline word_t LOAD(const uint8_t* bytes, int n) {
+  uint64_t x = 0;
+  if (n == 8)
+    x = U64BIG(*(uint64_t*)bytes);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) x |= (uint64_t)*bytes++ << i;
+  return U64TOWORD(x);
+}
+
+__forceinline void STORE(uint8_t* bytes, word_t w, int n) {
+  uint64_t x = WORDTOU64(w);
+  if (n == 8)
+    *(uint64_t*)bytes = U64BIG(x);
+  else
+    for (int i = 56; i >= 64 - n * 8; i -= 8) *bytes++ = x >> i;
+}
+
+#else
+#error "Ascon data access macro not defined correctly"
+#endif
+
+#endif /* LOADSTORE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/permutations.c

+#include "permutations.h"
+
+#include "round.h"
+
+#if !ASCON_UNROLL_LOOPS || ASCON_SINGLE_PERM
+
+const uint8_t constants[][2] = {{0xc, 0xc}, {0x9, 0xc}, {0xc, 0x9}, {0x9, 0x9},
+                                {0x6, 0xc}, {0x3, 0xc}, {0x6, 0x9}, {0x3, 0x9},
+                                {0xc, 0x6}, {0x9, 0x6}, {0xc, 0x3}, {0x9, 0x3}};
+
+#endif
+
+#if ASCON_INLINE_PERM
+
+#elif ASCON_SINGLE_PERM
+
+void P(state_t* s, uint8_t rounds) {
+  printstate(" permutation input", s);
+  for (int i = START(rounds); i < 12; i++)
+    ROUND(s, constants[i][0], constants[i][1]);
+}
+
+#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */
+
+void P12(state_t* s) { P12ROUNDS(s); }
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 16
+void P8(state_t* s) { P8ROUNDS(s); }
+#endif
+
+#if defined(CRYPTO_ABYTES) && ASCON_RATE == 8
+void P6(state_t* s) { P6ROUNDS(s); }
+#endif
+
+#endif

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/printstate.h

+#ifndef PRINTSTATE_H_
+#define PRINTSTATE_H_
+
+#ifdef NDEBUG
+
+#define printword(text, w)
+#define printstate(text, s)
+
+#else
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include "ascon.h"
+
+__forceinline void printword(const char* text, const word_t x) {
+  printf("%s=%016" PRIx64 "\n", text, WORDTOU64(x));
+}
+
+__forceinline void printstate(const char* text, const state_t* s) {
+  printf("%s:\n", text);
+  printword("  x0", s->x0);
+  printword("  x1", s->x1);
+  printword("  x2", s->x2);
+  printword("  x3", s->x3);
+  printword("  x4", s->x4);
+}
+
+#endif
+
+#endif /* PRINTSTATE_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/round.h

+#ifndef ROUND_H_
+#define ROUND_H_
+
+#include "ascon.h"
+#include "printstate.h"
+
+__forceinline void KINIT(word_t* K0, word_t* K1, word_t* K2) {
+  *K0 = WORD_T(0);
+  *K1 = WORD_T(0);
+  *K2 = WORD_T(0);
+}
+
+__forceinline void PINIT(state_t* s) {
+  s->x0 = WORD_T(0);
+  s->x1 = WORD_T(0);
+  s->x2 = WORD_T(0);
+  s->x3 = WORD_T(0);
+  s->x4 = WORD_T(0);
+}
+
+__forceinline void ROUND(state_t* s, uint32_t C_e, uint32_t C_o) {
+  uint32_t tmp0, tmp1, tmp2, tmp3;
+  /* clang-format off */
+  __asm__ __volatile__(                            \
+      "eor %[x2_e], %[x2_e], %[C_e]\n\t"           \
+      "eor %[x2_o], %[x2_o], %[C_o]\n\t"           \
+      "eor %[x0_e], %[x0_e], %[x4_e]\n\t"          \
+      "eor %[x0_o], %[x0_o], %[x4_o]\n\t"          \
+      "eor %[x4_e], %[x4_e], %[x3_e]\n\t"          \
+      "eor %[x4_o], %[x4_o], %[x3_o]\n\t"          \
+      "eor %[x2_e], %[x2_e], %[x1_e]\n\t"          \
+      "eor %[x2_o], %[x2_o], %[x1_o]\n\t"          \
+      "bic %[tmp0], %[x0_e], %[x4_e]\n\t"          \
+      "bic %[tmp1], %[x4_e], %[x3_e]\n\t"          \
+      "bic %[tmp2], %[x2_e], %[x1_e]\n\t"          \
+      "bic %[tmp3], %[x1_e], %[x0_e]\n\t"          \
+      "eor %[x2_e], %[x2_e], %[tmp1]\n\t"          \
+      "eor %[x0_e], %[x0_e], %[tmp2]\n\t"          \
+      "eor %[x4_e], %[x4_e], %[tmp3]\n\t"          \
+      "bic %[tmp3], %[x3_e], %[x2_e]\n\t"          \
+      "eor %[x3_e], %[x3_e], %[tmp0]\n\t"          \
+      "bic %[tmp2], %[x0_o], %[x4_o]\n\t"          \
+      "bic %[tmp0], %[x2_o], %[x1_o]\n\t"          \
+      "bic %[tmp1], %[x4_o], %[x3_o]\n\t"          \
+      "eor %[x1_e], %[x1_e], %[tmp3]\n\t"          \
+      "eor %[x0_o], %[x0_o], %[tmp0]\n\t"          \
+      "eor %[x2_o], %[x2_o], %[tmp1]\n\t"          \
+      "bic %[tmp3], %[x1_o], %[x0_o]\n\t"          \
+      "bic %[tmp0], %[x3_o], %[x2_o]\n\t"          \
+      "eor %[x3_o], %[x3_o], %[tmp2]\n\t"          \
+      "eor %[x3_o], %[x3_o], %[x2_o]\n\t"          \
+      "eor %[x4_o], %[x4_o], %[tmp3]\n\t"          \
+      "eor %[x1_o], %[x1_o], %[tmp0]\n\t"          \
+      "eor %[x3_e], %[x3_e], %[x2_e]\n\t"          \
+      "eor %[x1_e], %[x1_e], %[x0_e]\n\t"          \
+      "eor %[x1_o], %[x1_o], %[x0_o]\n\t"          \
+      "eor %[x0_e], %[x0_e], %[x4_e]\n\t"          \
+      "eor %[x0_o], %[x0_o], %[x4_o]\n\t"          \
+      "mvn %[x2_e], %[x2_e]\n\t"                   \
+      "mvn %[x2_o], %[x2_o]\n\t"                   \
+      "eor %[tmp0], %[x0_e], %[x0_o], ror #4\n\t"  \
+      "eor %[tmp1], %[x0_o], %[x0_e], ror #5\n\t"  \
+      "eor %[tmp2], %[x1_e], %[x1_e], ror #11\n\t" \
+      "eor %[tmp3], %[x1_o], %[x1_o], ror #11\n\t" \
+      "eor %[x0_e], %[x0_e], %[tmp1], ror #9\n\t"  \
+      "eor %[x0_o], %[x0_o], %[tmp0], ror #10\n\t" \
+      "eor %[x1_e], %[x1_e], %[tmp3], ror #19\n\t" \
+      "eor %[x1_o], %[x1_o], %[tmp2], ror #20\n\t" \
+      "eor %[tmp0], %[x2_e], %[x2_o], ror #2\n\t"  \
+      "eor %[tmp1], %[x2_o], %[x2_e], ror #3\n\t"  \
+      "eor %[tmp2], %[x3_e], %[x3_o], ror #3\n\t"  \
+      "eor %[tmp3], %[x3_o], %[x3_e], ror #4\n\t"  \
+      "eor %[x2_e], %[x2_e], %[tmp1]\n\t"          \
+      "eor %[x2_o], %[x2_o], %[tmp0], ror #1\n\t"  \
+      "eor %[x3_e], %[x3_e], %[tmp2], ror #5\n\t"  \
+      "eor %[x3_o], %[x3_o], %[tmp3], 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_e], %[x4_e], %[tmp1], ror #3\n\t"  \
+      "eor %[x4_o], %[x4_o], %[tmp0], ror #4\n\t"  \
+      : [ x0_e ] "+r"(s->x0.e),                    \
+        [ x1_e ] "+r"(s->x1.e),                    \
+        [ x2_e ] "+r"(s->x2.e),                    \
+        [ x3_e ] "+r"(s->x3.e),                    \
+        [ x4_e ] "+r"(s->x4.e),                    \
+        [ x0_o ] "+r"(s->x0.o),                    \
+        [ x1_o ] "+r"(s->x1.o),                    \
+        [ x2_o ] "+r"(s->x2.o),                    \
+        [ x3_o ] "+r"(s->x3.o),                    \
+        [ x4_o ] "+r"(s->x4.o),                    \
+        [ tmp0 ] "=r"(tmp0),                       \
+        [ tmp1 ] "=r"(tmp1),                       \
+        [ tmp2 ] "=r"(tmp2),                       \
+        [ tmp3 ] "=r"(tmp3)                        \
+      : [ C_e ] "i"(C_e),                          \
+        [ C_o ] "i"(C_o)                           \
+      : );
+  /* clang-format on */
+  printstate(" round output", s);
+}
+
+#endif /* ROUND_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_arm/word.h

+#ifndef WORD_H_
+#define WORD_H_
+
+#include <stdint.h>
+
+#include "config.h"
+
+typedef struct {
+  uint32_t e;
+  uint32_t o;
+} word_t;
+
+__forceinline word_t WORD_T(uint64_t x) {
+  return (word_t){.o = x >> 32, .e = x};
+}
+
+__forceinline uint64_t UINT64_T(word_t x) { return (uint64_t)x.o << 32 | x.e; }
+
+__forceinline uint64_t TOBI32(uint64_t in);
+
+__forceinline uint64_t FROMBI32(uint64_t in);
+
+__forceinline word_t U64TOWORD(uint64_t x) {
+  uint64_t w = TOBI32(x);
+  return (word_t){.o = w >> 32, .e = w};
+}
+
+__forceinline uint64_t WORDTOU64(word_t w) {
+  return FROMBI32((uint64_t)w.o << 32 | w.e);
+}
+
+#define XOR(a, b)  \
+  do {             \
+    word_t tb = b; \
+    (a).e ^= tb.e; \
+    (a).o ^= tb.o; \
+  } while (0)
+
+#define AND(a, b)  \
+  do {             \
+    word_t tb = b; \
+    (a).e &= tb.e; \
+    (a).o &= tb.o; \
+  } while (0)
+
+__forceinline uint32_t ROR32(uint32_t x, int n) {
+  return x >> n | x << (32 - n);
+}
+
+__forceinline word_t ROR64(word_t x, int n) {
+  word_t r;
+  r.e = (n % 2) ? ROR32(x.o, (n - 1) / 2) : ROR32(x.e, n / 2);
+  r.o = (n % 2) ? ROR32(x.e, (n + 1) / 2) : ROR32(x.o, n / 2);
+  return r;
+}
+
+__forceinline word_t KEYROT(word_t lo2hi, word_t hi2lo) {
+  word_t r;
+  r.o = lo2hi.o << 16 | hi2lo.o >> 16;
+  r.e = lo2hi.e << 16 | hi2lo.e >> 16;
+  return r;
+}
+
+__forceinline int NOTZERO(word_t a, word_t b) {
+  int result = 0;
+  for (int i = 0; i < 8; ++i) result |= ((uint8_t*)&a)[i];
+  for (int i = 0; i < 8; ++i) result |= ((uint8_t*)&b)[i];
+  return result;
+}
+
+/* set padding byte in 64-bit Ascon word */
+__forceinline word_t PAD(int i) {
+  return WORD_T((uint64_t)(0x08 << (28 - 4 * i)) << 32);
+}
+
+/* byte mask for 64-bit Ascon word (1 <= n <= 8) */
+__forceinline word_t XMASK(int n) {
+  uint32_t mask = 0x0fffffff >> (n * 4 - 4);
+  return WORD_T((uint64_t)mask << 32 | mask);
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+__forceinline uint64_t TOBI32(uint64_t in) {
+  uint32_t hi = in >> 32;
+  uint32_t lo = in;
+  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);
+  r0 = (lo & 0x0000FFFF) | (hi << 16);
+  r1 = (lo >> 16) | (hi & 0xFFFF0000);
+  return (uint64_t)r1 << 32 | r0;
+}
+
+/* credit to Henry S. Warren, Hacker's Delight, Addison-Wesley, 2002 */
+__forceinline uint64_t FROMBI32(uint64_t in) {
+  uint32_t r0 = in;
+  uint32_t r1 = in >> 32;
+  uint32_t lo = (r0 & 0x0000FFFF) | (r1 << 16);
+  uint32_t hi = (r0 >> 16) | (r1 & 0xFFFF0000);
+  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);
+  return (uint64_t)hi << 32 | lo;
+}
+
+#endif /* WORD_H_ */

ascon/Implementations/crypto_aead/ascon128av12/bi32_lowreg/api.h

@@ -3,3 +3,4 @@
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_NPUBBYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_ABYTES 16
 #define CRYPTO_NOOVERLAP 1
 #define CRYPTO_NOOVERLAP 1
+#define ASCON_RATE 16

ascon/Implementations/crypto_aead/ascon128av12/bi32_lowreg/ascon.c

+#include "ascon.h"
+
+#include "api.h"
+#include "loadstore.h"
+#include "permutations.h"
+#include "printstate.h"
+
+__forceinline void loadkey(word_t* K0, word_t* K1, word_t* K2,
+                           const uint8_t* k) {
+  KINIT(K0, K1, K2);
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(*K0, KEYROT(WORD_T(0), LOAD(k, 4)));
+    k += 4;
+  }
+  XOR(*K1, LOAD64(k));
+  XOR(*K2, LOAD64(k + 8));
+}
+
+__forceinline void init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  word_t N0, N1;
+  word_t K0, K1, K2;
+  /* load nonce */
+  N0 = LOAD64(npub);
+  N1 = LOAD64(npub + 8);
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* initialization */
+  PINIT(s);
+  XOR(s->x0, IV);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x0, K0);
+  XOR(s->x1, K1);
+  XOR(s->x2, K2);
+  XOR(s->x3, N0);
+  XOR(s->x4, N1);
+  P12(s);
+  if (CRYPTO_KEYBYTES == 20) XOR(s->x2, K0);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("initialization", s);
+}
+
+__forceinline void absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  word_t* restrict px;
+  /* process associated data */
+  if (adlen) {
+    while (adlen >= ASCON_RATE) {
+      XOR(s->x0, LOAD64(ad));
+      if (ASCON_RATE == 16) XOR(s->x1, LOAD64(ad + 8));
+      PB(s);
+      ad += ASCON_RATE;
+      adlen -= ASCON_RATE;
+    }
+    /* final associated data block */
+    px = &s->x0;
+    if (ASCON_RATE == 16 && adlen >= 8) {
+      XOR(s->x0, LOAD64(ad));
+      px = &s->x1;
+      ad += 8;
+      adlen -= 8;
+    }
+    if (adlen) XOR(*px, LOAD(ad, adlen));
+    XOR(*px, PAD(adlen));
+    PB(s);
+  }
+  XOR(s->x4, WORD_T(1));
+  printstate("process associated data", s);
+}
+
+__forceinline void encrypt(state_t* s, uint8_t* c, const uint8_t* m,
+                           uint64_t mlen) {
+  word_t* restrict px;
+  /* process plaintext */
+  while (mlen >= ASCON_RATE) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    if (ASCON_RATE == 16) {
+      XOR(s->x1, LOAD64(m + 8));
+      STORE64(c + 8, s->x1);
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    mlen -= ASCON_RATE;
+  }
+  /* final plaintext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && mlen >= 8) {
+    XOR(s->x0, LOAD64(m));
+    STORE64(c, s->x0);
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    mlen -= 8;
+  }
+  if (mlen) {
+    XOR(*px, LOAD(m, mlen));
+    STORE(c, *px, mlen);
+  }
+  XOR(*px, PAD(mlen));
+  printstate("process plaintext", s);
+}
+
+__forceinline void decrypt(state_t* s, uint8_t* m, const uint8_t* c,
+                           uint64_t clen) {
+  word_t* restrict px;
+  word_t cx;
+  /* process ciphertext */
+  while (clen >= ASCON_RATE) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    if (ASCON_RATE == 16) {
+      cx = LOAD64(c + 8);
+      XOR(s->x1, cx);
+      STORE64(m + 8, s->x1);
+      s->x1 = cx;
+    }
+    PB(s);
+    m += ASCON_RATE;
+    c += ASCON_RATE;
+    clen -= ASCON_RATE;
+  }
+  /* final ciphertext block */
+  px = &s->x0;
+  if (ASCON_RATE == 16 && clen >= 8) {
+    cx = LOAD64(c);
+    XOR(s->x0, cx);
+    STORE64(m, s->x0);
+    s->x0 = cx;
+    px = &s->x1;
+    m += 8;
+    c += 8;
+    clen -= 8;
+  }
+  if (clen) {
+    cx = LOAD(c, clen);
+    XOR(*px, cx);
+    STORE(m, *px, clen);
+    AND(*px, XMASK(clen));
+    XOR(*px, cx);
+  }
+  XOR(*px, PAD(clen));
+  printstate("process ciphertext", s);
+}
+
+__forceinline void final(state_t* s, const uint8_t* k) {
+  word_t K0, K1, K2;
+  /* load key */
+  loadkey(&K0, &K1, &K2, k);
+  /* finalization */
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 8) {
+    XOR(s->x1, K1);
+    XOR(s->x2, K2);
+  }
+  if (CRYPTO_KEYBYTES == 16 && ASCON_RATE == 16) {
+    XOR(s->x2, K1);
+    XOR(s->x3, K2);
+  }
+  if (CRYPTO_KEYBYTES == 20) {
+    XOR(s->x1, KEYROT(K0, K1));
+    XOR(s->x2, KEYROT(K1, K2));
+    XOR(s->x3, KEYROT(K2, WORD_T(0)));
+  }
+  P12(s);
+  XOR(s->x3, K1);
+  XOR(s->x4, K2);
+  printstate("finalization", s);
+}
+
+#if !ASCON_INLINE_MODE
+
+#define INIT ascon_init
+#define ABSORB ascon_absorb
+#define ENCRYPT ascon_encrypt
+#define DECRYPT ascon_decrypt
+#define FINAL ascon_final
+
+void ascon_init(state_t* s, const uint8_t* npub, const uint8_t* k) {
+  init(s, npub, k);
+}
+
+void ascon_absorb(state_t* s, const uint8_t* ad, uint64_t adlen) {
+  absorb(s, ad, adlen);
+}
+
+void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen) {
+  encrypt(s, c, m, mlen);
+}
+
+void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen) {
+  decrypt(s, m, c, clen);
+}
+
+void ascon_final(state_t* s, const uint8_t* k) { final(s, k); }
+
+#else
+
+#define INIT init
+#define ABSORB absorb
+#define ENCRYPT encrypt
+#define DECRYPT decrypt
+#define FINAL final
+
+#endif
+
+int crypto_aead_encrypt(uint8_t* c, uint64_t* clen, const uint8_t* m,
+                        uint64_t mlen, const uint8_t* ad, uint64_t adlen,
+                        const uint8_t* nsec, const uint8_t* npub,
+                        const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  *clen = mlen + CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  ENCRYPT(&s, c, m, mlen);
+  FINAL(&s, k);
+  /* set tag */
+  c += mlen;
+  STORE64(c, s.x3);
+  STORE64(c + 8, s.x4);
+  return 0;
+}
+
+int crypto_aead_decrypt(uint8_t* m, uint64_t* mlen, uint8_t* nsec,
+                        const uint8_t* c, uint64_t clen, const uint8_t* ad,
+                        uint64_t adlen, const uint8_t* npub, const uint8_t* k) {
+  state_t s;
+  (void)nsec;
+  if (clen < CRYPTO_ABYTES) {
+    *mlen = 0;
+    return -1;
+  }
+  *mlen = clen = clen - CRYPTO_ABYTES;
+  /* perform ascon computation */
+  INIT(&s, npub, k);
+  ABSORB(&s, ad, adlen);
+  DECRYPT(&s, m, c, clen);
+  FINAL(&s, k);
+  /* verify tag (should be constant time, check compiler output) */
+  c += clen;
+  XOR(s.x3, LOAD64(c));
+  XOR(s.x4, LOAD64(c + 8));
+  if (NOTZERO(s.x3, s.x4)) {
+    *mlen = 0;
+    return -1;
+  }
+  return 0;
+}