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-rw-r--r--sha3.c311
-rw-r--r--sha3.h6
2 files changed, 317 insertions, 0 deletions
diff --git a/sha3.c b/sha3.c
index 6ab3064..01dd4f8 100644
--- a/sha3.c
+++ b/sha3.c
@@ -1158,6 +1158,143 @@ void parallelhash128_xof_once(const parallelhash_params_t params, const uint8_t
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_xof_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_xof_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_xof_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);
+ }
+
+ 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);
+}
+
#ifdef SHA3_TEST
#include <stdio.h> // printf()
@@ -3918,6 +4055,178 @@ static void test_parallelhash128_xof(void) {
}
}
+static void test_parallelhash256(void) {
+ static const struct {
+ const char *name; // test name
+ const uint8_t custom[256]; // custom name
+ const size_t custom_len; // custom name length
+ const size_t block_len; // block size, in bytes
+ const uint8_t msg[256]; // input data
+ const size_t len; // message length, in bytes
+ const uint8_t exp[64]; // expected hash
+ } tests[] = {{
+ // src: https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/ParallelHash_samples.pdf
+ .name = "ParallelHash Sample #4",
+ .custom = "",
+ .custom_len = 0,
+ .block_len = 8,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ },
+ .len = 24,
+ .exp = {
+ 0xBC, 0x1E, 0xF1, 0x24, 0xDA, 0x34, 0x49, 0x5E, 0x94, 0x8E, 0xAD, 0x20, 0x7D, 0xD9, 0x84, 0x22,
+ 0x35, 0xDA, 0x43, 0x2D, 0x2B, 0xBC, 0x54, 0xB4, 0xC1, 0x10, 0xE6, 0x4C, 0x45, 0x11, 0x05, 0x53,
+ 0x1B, 0x7F, 0x2A, 0x3E, 0x0C, 0xE0, 0x55, 0xC0, 0x28, 0x05, 0xE7, 0xC2, 0xDE, 0x1F, 0xB7, 0x46,
+ 0xAF, 0x97, 0xA1, 0xDD, 0x01, 0xF4, 0x3B, 0x82, 0x4E, 0x31, 0xB8, 0x76, 0x12, 0x41, 0x04, 0x29,
+ },
+ }, {
+ .name = "ParallelHash Sample #5",
+ .custom = "Parallel Data",
+ .custom_len = 13,
+ .block_len = 8,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ },
+ .len = 24,
+ .exp = {
+ 0xCD, 0xF1, 0x52, 0x89, 0xB5, 0x4F, 0x62, 0x12, 0xB4, 0xBC, 0x27, 0x05, 0x28, 0xB4, 0x95, 0x26,
+ 0x00, 0x6D, 0xD9, 0xB5, 0x4E, 0x2B, 0x6A, 0xDD, 0x1E, 0xF6, 0x90, 0x0D, 0xDA, 0x39, 0x63, 0xBB,
+ 0x33, 0xA7, 0x24, 0x91, 0xF2, 0x36, 0x96, 0x9C, 0xA8, 0xAF, 0xAE, 0xA2, 0x9C, 0x68, 0x2D, 0x47,
+ 0xA3, 0x93, 0xC0, 0x65, 0xB3, 0x8E, 0x29, 0xFA, 0xE6, 0x51, 0xA2, 0x09, 0x1C, 0x83, 0x31, 0x10,
+ },
+ }, {
+ .name = "ParallelHash Sample #6",
+ .custom = "Parallel Data",
+ .custom_len = 13,
+ .block_len = 12,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x10, 0x11, 0x12, 0x13,
+ 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2A, 0x2B, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
+ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x50, 0x51, 0x52, 0x53,
+ 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
+ },
+ .len = 72,
+ .exp = {
+ 0x69, 0xD0, 0xFC, 0xB7, 0x64, 0xEA, 0x05, 0x5D, 0xD0, 0x93, 0x34, 0xBC, 0x60, 0x21, 0xCB, 0x7E,
+ 0x4B, 0x61, 0x34, 0x8D, 0xFF, 0x37, 0x5D, 0xA2, 0x62, 0x67, 0x1C, 0xDE, 0xC3, 0xEF, 0xFA, 0x8D,
+ 0x1B, 0x45, 0x68, 0xA6, 0xCC, 0xE1, 0x6B, 0x1C, 0xAD, 0x94, 0x6D, 0xDD, 0xE2, 0x7F, 0x6C, 0xE2,
+ 0xB8, 0xDE, 0xE4, 0xCD, 0x1B, 0x24, 0x85, 0x1E, 0xBF, 0x00, 0xEB, 0x90, 0xD4, 0x38, 0x13, 0xE9,
+ },
+ }};
+
+ for (size_t i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
+ // build params
+ const parallelhash_params_t params = {
+ .block_len = tests[i].block_len,
+ .custom = tests[i].custom,
+ .custom_len = tests[i].custom_len,
+ };
+
+ // run
+ uint8_t got[64];
+ parallelhash256(params, tests[i].msg, tests[i].len, got, sizeof(got));
+
+ // check
+ if (memcmp(got, tests[i].exp, sizeof(got))) {
+ fprintf(stderr, "test_parallelhash256(\"%s\") failed, got:\n", tests[i].name);
+ dump_hex(stderr, got, sizeof(got));
+
+ fprintf(stderr, "exp:\n");
+ dump_hex(stderr, tests[i].exp, sizeof(got));
+ }
+ }
+}
+
+static void test_parallelhash256_xof(void) {
+ static const struct {
+ const char *name; // test name
+ const uint8_t custom[256]; // custom name
+ const size_t custom_len; // custom name length
+ const size_t block_len; // block size, in bytes
+ const uint8_t msg[256]; // input data
+ const size_t len; // message length, in bytes
+ const uint8_t exp[64]; // expected hash
+ } tests[] = {{
+ // src: https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/ParallelHashXOF_samples.pdf
+ .name = "ParallelHashXOF Sample #4",
+ .custom = "",
+ .custom_len = 0,
+ .block_len = 8,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ },
+ .len = 24,
+ .exp = {
+ 0xC1, 0x0A, 0x05, 0x27, 0x22, 0x61, 0x46, 0x84, 0x14, 0x4D, 0x28, 0x47, 0x48, 0x50, 0xB4, 0x10,
+ 0x75, 0x7E, 0x3C, 0xBA, 0x87, 0x65, 0x1B, 0xA1, 0x67, 0xA5, 0xCB, 0xDD, 0xFF, 0x7F, 0x46, 0x66,
+ 0x75, 0xFB, 0xF8, 0x4B, 0xCA, 0xE7, 0x37, 0x8A, 0xC4, 0x44, 0xBE, 0x68, 0x1D, 0x72, 0x94, 0x99,
+ 0xAF, 0xCA, 0x66, 0x7F, 0xB8, 0x79, 0x34, 0x8B, 0xFD, 0xDA, 0x42, 0x78, 0x63, 0xC8, 0x2F, 0x1C,
+ },
+ }, {
+ .name = "ParallelHashXOF Sample #5",
+ .custom = "Parallel Data",
+ .custom_len = 13,
+ .block_len = 8,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ },
+ .len = 24,
+ .exp = {
+ 0x53, 0x8E, 0x10, 0x5F, 0x1A, 0x22, 0xF4, 0x4E, 0xD2, 0xF5, 0xCC, 0x16, 0x74, 0xFB, 0xD4, 0x0B,
+ 0xE8, 0x03, 0xD9, 0xC9, 0x9B, 0xF5, 0xF8, 0xD9, 0x0A, 0x2C, 0x81, 0x93, 0xF3, 0xFE, 0x6E, 0xA7,
+ 0x68, 0xE5, 0xC1, 0xA2, 0x09, 0x87, 0xE2, 0xC9, 0xC6, 0x5F, 0xEB, 0xED, 0x03, 0x88, 0x7A, 0x51,
+ 0xD3, 0x56, 0x24, 0xED, 0x12, 0x37, 0x75, 0x94, 0xB5, 0x58, 0x55, 0x41, 0xDC, 0x37, 0x7E, 0xFC,
+ },
+ }, {
+ .name = "ParallelHashXOF Sample #6",
+ .custom = "Parallel Data",
+ .custom_len = 13,
+ .block_len = 12,
+ .msg = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x10, 0x11, 0x12, 0x13,
+ 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2A, 0x2B, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
+ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x50, 0x51, 0x52, 0x53,
+ 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
+ },
+ .len = 72,
+ .exp = {
+ 0x6B, 0x3E, 0x79, 0x0B, 0x33, 0x0C, 0x88, 0x9A, 0x20, 0x4C, 0x2F, 0xBC, 0x72, 0x8D, 0x80, 0x9F,
+ 0x19, 0x36, 0x73, 0x28, 0xD8, 0x52, 0xF4, 0x00, 0x2D, 0xC8, 0x29, 0xF7, 0x3A, 0xFD, 0x6B, 0xCE,
+ 0xFB, 0x7F, 0xE5, 0xB6, 0x07, 0xB1, 0x3A, 0x80, 0x1C, 0x0B, 0xE5, 0xC1, 0x17, 0x0B, 0xDB, 0x79,
+ 0x4E, 0x33, 0x94, 0x58, 0xFD, 0xB0, 0xE6, 0x2A, 0x6A, 0xF3, 0xD4, 0x25, 0x58, 0x97, 0x02, 0x49,
+ },
+ }};
+
+ for (size_t i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
+ // build params
+ const parallelhash_params_t params = {
+ .block_len = tests[i].block_len,
+ .custom = tests[i].custom,
+ .custom_len = tests[i].custom_len,
+ };
+
+ // run
+ uint8_t got[64];
+ parallelhash256_xof_once(params, tests[i].msg, tests[i].len, got, sizeof(got));
+
+ // check
+ if (memcmp(got, tests[i].exp, sizeof(got))) {
+ fprintf(stderr, "test_parallelhash256_xof(\"%s\") failed, got:\n", tests[i].name);
+ dump_hex(stderr, got, sizeof(got));
+
+ fprintf(stderr, "exp:\n");
+ dump_hex(stderr, tests[i].exp, sizeof(got));
+ }
+ }
+}
+
int main(void) {
test_theta();
test_rho();
@@ -3951,6 +4260,8 @@ int main(void) {
test_tuplehash256_xof();
test_parallelhash128();
test_parallelhash128_xof();
+ test_parallelhash256();
+ test_parallelhash256_xof();
printf("ok\n");
}
diff --git a/sha3.h b/sha3.h
index 11dd8cb..76de7b0 100644
--- a/sha3.h
+++ b/sha3.h
@@ -113,12 +113,18 @@ typedef struct {
} parallelhash_t;
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);
+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);
void parallelhash128_xof_init(parallelhash_t *hash, const parallelhash_params_t params);
void parallelhash128_xof_absorb(parallelhash_t *hash, const uint8_t *msg, const size_t msg_len);
void parallelhash128_xof_squeeze(parallelhash_t *hash, uint8_t *dst, const size_t 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);
+void parallelhash256_xof_init(parallelhash_t *hash, const parallelhash_params_t params);
+void parallelhash256_xof_absorb(parallelhash_t *hash, const uint8_t *msg, const size_t msg_len);
+void parallelhash256_xof_squeeze(parallelhash_t *hash, uint8_t *dst, const size_t 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);
+
#ifdef __cplusplus
}
#endif /* __cplusplus */
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 21:05:15 +0000