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authorPaul Duncan <pabs@pablotron.org>2024-03-02 12:29:09 -0500
committerPaul Duncan <pabs@pablotron.org>2024-03-02 12:29:09 -0500
commitcf907eae0b0815c7e16b09369c32be104f7972bf (patch)
treea84680cdcdcad85c5646977ccd53cee1040498ab /sha3.c
parent13ecf3e50ac291bd1a3b81e890bb4a4e704eaff7 (diff)
downloadsha3-cf907eae0b0815c7e16b09369c32be104f7972bf.tar.bz2
sha3-cf907eae0b0815c7e16b09369c32be104f7972bf.zip
sha3.c: parameterize parallelhash
Diffstat (limited to 'sha3.c')
-rw-r--r--sha3.c414
1 files changed, 143 insertions, 271 deletions
diff --git a/sha3.c b/sha3.c
index a3fa2e2..074d7aa 100644
--- a/sha3.c
+++ b/sha3.c
@@ -1324,279 +1324,151 @@ DEF_KMAC(256) // kmac256
DEF_TUPLEHASH(128) // tuplehash128, tuplehash128-xof
DEF_TUPLEHASH(256) // tuplehash256, tuplehash256-xof
-static void parallelhash128_emit_block(parallelhash_t * const hash) {
- // squeeze curr xof, absorb into root xof
- uint8_t buf[32];
- shake128_squeeze(&(hash->curr_xof), buf, sizeof(buf));
- (void) cshake128_xof_absorb(&(hash->root_xof), buf, sizeof(buf));
-
- // increment block count
- hash->num_blocks++;
-}
-
-static inline void parallelhash128_reset_curr_xof(parallelhash_t *hash) {
- // init curr xof
- shake128_init(&(hash->curr_xof));
- hash->ofs = 0;
-}
-
-static inline void parallelhash128_init(parallelhash_t *hash, const parallelhash_params_t params) {
- static const uint8_t NAME[] = { 'P', 'a', 'r', 'a', 'l', 'l', 'e', 'l', 'H', 'a', 's', 'h' };
-
- // build root xof cshake128 params
- const cshake_params_t root_cshake_params = {
- .name = NAME,
- .name_len = sizeof(NAME),
- .custom = params.custom,
- .custom_len = params.custom_len,
- };
-
- // init root xof
- cshake128_xof_init(&(hash->root_xof), root_cshake_params);
-
- // build block size
- uint8_t buf[9] = { 0 };
- const size_t buf_len = left_encode(buf, params.block_len);
-
- // absorb block length into root xof
- (void) cshake128_xof_absorb(&(hash->root_xof), buf, buf_len);
-
- // set parameters
- hash->block_len = params.block_len;
- hash->num_blocks = 0;
- hash->squeezing = false;
-
- // init curr xof
- parallelhash128_reset_curr_xof(hash);
-}
-
-static inline void parallelhash128_absorb(parallelhash_t * const hash, const uint8_t *msg, size_t msg_len) {
- while (msg_len > 0) {
- const size_t len = MIN(msg_len, hash->block_len - hash->ofs);
- (void) shake128_absorb(&(hash->curr_xof), msg, len);
- msg += len;
- msg_len -= len;
-
- hash->ofs += len;
- if (hash->ofs == hash->block_len) {
- // emit block, reset curr xof
- parallelhash128_emit_block(hash);
- parallelhash128_reset_curr_xof(hash);
- }
- }
-}
-
-static inline void parallelhash128_squeeze(parallelhash_t * const hash, uint8_t * const dst, const size_t dst_len) {
- if (!hash->squeezing) {
- // mark as squeezing
- hash->squeezing = true;
-
- if (hash->ofs > 0) {
- // squeeze curr xof, absorb into root xof
- parallelhash128_emit_block(hash);
- }
-
- {
- // build num blocks suffix
- uint8_t buf[9] = { 0 };
- const size_t len = right_encode(buf, hash->num_blocks);
-
- // absorb num blocks suffix into root xof
- (void) cshake128_xof_absorb(&(hash->root_xof), buf, len);
- }
-
- {
- // build output size suffix
- uint8_t buf[9] = { 0 };
- const size_t len = right_encode(buf, dst_len << 3);
-
- // absorb output size suffix into root xof
- (void) cshake128_xof_absorb(&(hash->root_xof), buf, len);
- }
- }
-
- if (dst_len > 0) {
- cshake128_xof_squeeze(&(hash->root_xof), dst, dst_len);
- }
-}
-
-void parallelhash128(const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) {
- // init
- parallelhash_t hash;
- parallelhash128_init(&hash, params);
-
- // absorb
- parallelhash128_absorb(&hash, src, src_len);
-
- // squeeze
- parallelhash128_squeeze(&hash, dst, dst_len);
-}
-
-void parallelhash128_xof_init(parallelhash_t *hash, const parallelhash_params_t params) {
- parallelhash128_init(hash, params);
-}
-
-void parallelhash128_xof_absorb(parallelhash_t *hash, const uint8_t *msg, const size_t msg_len) {
- parallelhash128_absorb(hash, msg, msg_len);
-}
-
-void parallelhash128_xof_squeeze(parallelhash_t *hash, uint8_t *dst, const size_t dst_len) {
- if (!hash->squeezing) {
- // emit zero length
- parallelhash128_squeeze(hash, dst, 0);
- }
-
- parallelhash128_squeeze(hash, dst, dst_len);
-}
-
-void parallelhash128_xof_once(const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) {
- // init
- parallelhash_t hash;
- parallelhash128_xof_init(&hash, params);
-
- // absorb
- parallelhash128_xof_absorb(&hash, src, src_len);
-
- // squeeze
- parallelhash128_xof_squeeze(&hash, dst, dst_len);
-}
-
-static void parallelhash256_emit_block(parallelhash_t * const hash) {
- // squeeze curr xof, absorb into root xof
- uint8_t buf[64];
- shake256_squeeze(&(hash->curr_xof), buf, sizeof(buf));
- (void) cshake256_xof_absorb(&(hash->root_xof), buf, sizeof(buf));
-
- // increment block count
- hash->num_blocks++;
-}
-
-static inline void parallelhash256_reset_curr_xof(parallelhash_t *hash) {
- // init curr xof
- shake256_init(&(hash->curr_xof));
- hash->ofs = 0;
-}
-
-static inline void parallelhash256_init(parallelhash_t *hash, const parallelhash_params_t params) {
- static const uint8_t NAME[] = { 'P', 'a', 'r', 'a', 'l', 'l', 'e', 'l', 'H', 'a', 's', 'h' };
-
- // build root xof cshake256 params
- const cshake_params_t root_cshake_params = {
- .name = NAME,
- .name_len = sizeof(NAME),
- .custom = params.custom,
- .custom_len = params.custom_len,
- };
-
- // init root xof
- cshake256_xof_init(&(hash->root_xof), root_cshake_params);
-
- // build block size
- uint8_t buf[9] = { 0 };
- const size_t buf_len = left_encode(buf, params.block_len);
-
- // absorb block length into root xof
- (void) cshake256_xof_absorb(&(hash->root_xof), buf, buf_len);
-
- // set parameters
- hash->block_len = params.block_len;
- hash->num_blocks = 0;
- hash->squeezing = false;
-
- // init curr xof
- parallelhash256_reset_curr_xof(hash);
-}
-
-static inline void parallelhash256_absorb(parallelhash_t * const hash, const uint8_t *msg, size_t msg_len) {
- while (msg_len > 0) {
- const size_t len = MIN(msg_len, hash->block_len - hash->ofs);
- (void) shake256_absorb(&(hash->curr_xof), msg, len);
- msg += len;
- msg_len -= len;
-
- hash->ofs += len;
- if (hash->ofs == hash->block_len) {
- // emit block, reset curr xof
- parallelhash256_emit_block(hash);
- parallelhash256_reset_curr_xof(hash);
- }
- }
-}
-
-static inline void parallelhash256_squeeze(parallelhash_t * const hash, uint8_t * const dst, const size_t dst_len) {
- if (!hash->squeezing) {
- // mark as squeezing
- hash->squeezing = true;
-
- if (hash->ofs > 0) {
- // squeeze curr xof, absorb into root xof
- parallelhash256_emit_block(hash);
- }
-
- {
- // build num blocks suffix
- uint8_t buf[9] = { 0 };
- const size_t len = right_encode(buf, hash->num_blocks);
-
- // absorb num blocks suffix into root xof
- (void) cshake256_xof_absorb(&(hash->root_xof), buf, len);
- }
-
- {
- // build output size suffix
- uint8_t buf[9] = { 0 };
- const size_t len = right_encode(buf, dst_len << 3);
-
- // absorb output size suffix into root xof
- (void) cshake256_xof_absorb(&(hash->root_xof), buf, len);
- }
- }
-
- if (dst_len > 0) {
- cshake256_xof_squeeze(&(hash->root_xof), dst, dst_len);
- }
-}
-
-void parallelhash256(const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) {
- // init
- parallelhash_t hash;
- parallelhash256_init(&hash, params);
-
- // absorb
- parallelhash256_absorb(&hash, src, src_len);
-
- // squeeze
- parallelhash256_squeeze(&hash, dst, dst_len);
-}
-
-void parallelhash256_xof_init(parallelhash_t *hash, const parallelhash_params_t params) {
- parallelhash256_init(hash, params);
-}
-
-void parallelhash256_xof_absorb(parallelhash_t *hash, const uint8_t *msg, const size_t msg_len) {
- parallelhash256_absorb(hash, msg, msg_len);
-}
-
-void parallelhash256_xof_squeeze(parallelhash_t *hash, uint8_t *dst, const size_t dst_len) {
- if (!hash->squeezing) {
- // emit zero length
- parallelhash256_squeeze(hash, dst, 0);
+#define DEF_PARALLELHASH(BITS) \
+ static inline void parallelhash ## BITS ## _emit_block(parallelhash_t * const hash) { \
+ /* squeeze curr xof, absorb into root xof */ \
+ uint8_t buf[BITS / 4]; /* ph128: 32, ph256: 64 */ \
+ shake ## BITS ## _squeeze(&(hash->curr_xof), buf, sizeof(buf)); \
+ (void) cshake ## BITS ## _xof_absorb(&(hash->root_xof), buf, sizeof(buf)); \
+ \
+ /* increment block count */ \
+ hash->num_blocks++; \
+ } \
+ \
+ static inline void parallelhash ## BITS ## _reset_curr_xof(parallelhash_t *hash) { \
+ /* init curr xof */ \
+ shake ## BITS ## _init(&(hash->curr_xof)); \
+ hash->ofs = 0; \
+ } \
+ \
+ static inline void parallelhash ## BITS ## _init(parallelhash_t *hash, const parallelhash_params_t params) { \
+ static const uint8_t NAME[] = { 'P', 'a', 'r', 'a', 'l', 'l', 'e', 'l', 'H', 'a', 's', 'h' }; \
+ \
+ /* build root xof cshake ## BITS ## params */ \
+ const cshake_params_t root_cshake_params = { \
+ .name = NAME, \
+ .name_len = sizeof(NAME), \
+ .custom = params.custom, \
+ .custom_len = params.custom_len, \
+ }; \
+ \
+ /* init root xof */ \
+ cshake ## BITS ## _xof_init(&(hash->root_xof), root_cshake_params); \
+ \
+ /* build block size */ \
+ uint8_t buf[9] = { 0 }; \
+ const size_t buf_len = left_encode(buf, params.block_len); \
+ \
+ /* absorb block length into root xof */ \
+ (void) cshake ## BITS ## _xof_absorb(&(hash->root_xof), buf, buf_len); \
+ \
+ /* set parameters */ \
+ hash->block_len = params.block_len; \
+ hash->num_blocks = 0; \
+ hash->squeezing = false; \
+ \
+ /* init curr xof */ \
+ parallelhash ## BITS ## _reset_curr_xof(hash); \
+ } \
+ \
+ static inline void parallelhash ## BITS ## _absorb(parallelhash_t * const hash, const uint8_t *msg, size_t msg_len) { \
+ while (msg_len > 0) { \
+ const size_t len = MIN(msg_len, hash->block_len - hash->ofs); \
+ (void) shake ## BITS ## _absorb(&(hash->curr_xof), msg, len); \
+ msg += len; \
+ msg_len -= len; \
+ \
+ hash->ofs += len; \
+ if (hash->ofs == hash->block_len) { \
+ /* emit block, reset curr xof */ \
+ parallelhash ## BITS ## _emit_block(hash); \
+ parallelhash ## BITS ## _reset_curr_xof(hash); \
+ } \
+ } \
+ } \
+ \
+ static inline void parallelhash ## BITS ## _squeeze(parallelhash_t * const hash, uint8_t * const dst, const size_t dst_len) { \
+ if (!hash->squeezing) { \
+ /* mark as squeezing */ \
+ hash->squeezing = true; \
+ \
+ if (hash->ofs > 0) { \
+ /* squeeze curr xof, absorb into root xof */ \
+ parallelhash ## BITS ## _emit_block(hash); \
+ } \
+ \
+ { \
+ /* build num blocks suffix */ \
+ uint8_t buf[9] = { 0 }; \
+ const size_t len = right_encode(buf, hash->num_blocks); \
+ \
+ /* absorb num blocks suffix into root xof */ \
+ (void) cshake ## BITS ## _xof_absorb(&(hash->root_xof), buf, len); \
+ } \
+ \
+ { \
+ /* build output size suffix */ \
+ uint8_t buf[9] = { 0 }; \
+ const size_t len = right_encode(buf, dst_len << 3); \
+ \
+ /* absorb output size suffix into root xof */ \
+ (void) cshake ## BITS ## _xof_absorb(&(hash->root_xof), buf, len); \
+ } \
+ } \
+ \
+ if (dst_len > 0) { \
+ cshake ## BITS ## _xof_squeeze(&(hash->root_xof), dst, dst_len); \
+ } \
+ } \
+ \
+ /* one-shot fixed-length parallelhash (non-xof) */ \
+ void parallelhash ## BITS (const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) { \
+ /* init */ \
+ parallelhash_t hash; \
+ parallelhash ## BITS ## _init(&hash, params); \
+ \
+ /* absorb */ \
+ parallelhash ## BITS ## _absorb(&hash, src, src_len); \
+ \
+ /* squeeze */ \
+ parallelhash ## BITS ## _squeeze(&hash, dst, dst_len); \
+ } \
+ \
+ /* init parallelhash xof context */ \
+ void parallelhash ## BITS ## _xof_init(parallelhash_t *hash, const parallelhash_params_t params) { \
+ parallelhash ## BITS ## _init(hash, params); \
+ } \
+ \
+ /* absorb data into parallelhash xof context */ \
+ void parallelhash ## BITS ## _xof_absorb(parallelhash_t *hash, const uint8_t *msg, const size_t msg_len) { \
+ parallelhash ## BITS ## _absorb(hash, msg, msg_len); \
+ } \
+ \
+ /* squeeze data from parallelhash xof context */ \
+ void parallelhash ## BITS ## _xof_squeeze(parallelhash_t *hash, uint8_t *dst, const size_t dst_len) { \
+ if (!hash->squeezing) { \
+ /* emit zero length */ \
+ parallelhash ## BITS ## _squeeze(hash, dst, 0); \
+ } \
+ \
+ parallelhash ## BITS ## _squeeze(hash, dst, dst_len); \
+ } \
+ \
+ /* one-shot parallelhash-xof */ \
+ void parallelhash ## BITS ## _xof_once(const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) { \
+ /* init */ \
+ parallelhash_t hash; \
+ parallelhash ## BITS ## _xof_init(&hash, params); \
+ \
+ /* absorb */ \
+ parallelhash ## BITS ## _xof_absorb(&hash, src, src_len); \
+ \
+ /* squeeze */ \
+ parallelhash ## BITS ## _xof_squeeze(&hash, dst, dst_len); \
}
- parallelhash256_squeeze(hash, dst, dst_len);
-}
-
-void parallelhash256_xof_once(const parallelhash_params_t params, const uint8_t * const src, const size_t src_len, uint8_t * const dst, const size_t dst_len) {
- // init
- parallelhash_t hash;
- parallelhash256_xof_init(&hash, params);
-
- // absorb
- parallelhash256_xof_absorb(&hash, src, src_len);
-
- // squeeze
- parallelhash256_xof_squeeze(&hash, dst, dst_len);
-}
+DEF_PARALLELHASH(128) // parallelhash128, parallehash128-xof
+DEF_PARALLELHASH(256) // parallelhash256, parallehash256-xof
// number of rounds
#define TURBOSHAKE_NUM_ROUNDS 12