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-rw-r--r--sha3.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/sha3.c b/sha3.c
index 972a77a..f08cafe 100644
--- a/sha3.c
+++ b/sha3.c
@@ -1021,6 +1021,143 @@ void tuplehash256_xof_once(const tuplehash_params_t params, uint8_t * const dst,
cshake256_xof_squeeze(&xof, dst, dst_len);
}
+static void parallelhash128_emit_block(parallelhash_t * const hash) {
+ // squeeze curr xof, absorb into root xof
+ uint8_t buf[32];
+ shake128_xof_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_xof_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_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
+ 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_absorb(&hash, src, src_len);
+
+ // squeeze
+ parallelhash128_squeeze(&hash, dst, dst_len);
+}
+
#ifdef SHA3_TEST
#include <stdio.h> // printf()
@@ -3621,6 +3758,132 @@ static void test_tuplehash256_xof(void) {
}
}
+static void test_parallelhash128(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[32]; // expected hash
+ } tests[] = {{
+ // src: https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/ParallelHash_samples.pdf
+ .name = "ParallelHash Sample #1",
+ .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 = {
+ 0xBA, 0x8D, 0xC1, 0xD1, 0xD9, 0x79, 0x33, 0x1D, 0x3F, 0x81, 0x36, 0x03, 0xC6, 0x7F, 0x72, 0x60,
+ 0x9A, 0xB5, 0xE4, 0x4B, 0x94, 0xA0, 0xB8, 0xF9, 0xAF, 0x46, 0x51, 0x44, 0x54, 0xA2, 0xB4, 0xF5,
+ },
+ }, {
+ .name = "ParallelHash Sample #2",
+ .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 = {
+ 0xFC, 0x48, 0x4D, 0xCB, 0x3F, 0x84, 0xDC, 0xEE, 0xDC, 0x35, 0x34, 0x38, 0x15, 0x1B, 0xEE, 0x58,
+ 0x15, 0x7D, 0x6E, 0xFE, 0xD0, 0x44, 0x5A, 0x81, 0xF1, 0x65, 0xE4, 0x95, 0x79, 0x5B, 0x72, 0x06,
+ },
+ }};
+
+ 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[32];
+ parallelhash128(params, tests[i].msg, tests[i].len, got, sizeof(got));
+
+ // check
+ if (memcmp(got, tests[i].exp, sizeof(got))) {
+ fprintf(stderr, "test_parallelhash128(\"%s\") failed, got:\n", tests[i].name);
+ dump_hex(stderr, got, 32);
+
+ fprintf(stderr, "exp:\n");
+ dump_hex(stderr, tests[i].exp, 32);
+ }
+ }
+}
+
+static void test_parallelhash128_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[32]; // expected hash
+ } tests[] = {{
+ // src: https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/ParallelHashXOF_samples.pdf
+ .name = "ParallelHashXOF Sample #1",
+ .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 = {
+ 0xFE, 0x47, 0xD6, 0x61, 0xE4, 0x9F, 0xFE, 0x5B, 0x7D, 0x99, 0x99, 0x22, 0xC0, 0x62, 0x35, 0x67,
+ 0x50, 0xCA, 0xF5, 0x52, 0x98, 0x5B, 0x8E, 0x8C, 0xE6, 0x66, 0x7F, 0x27, 0x27, 0xC3, 0xC8, 0xD3,
+ },
+ }, {
+ .name = "ParallelHashXOF Sample #2",
+ .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 = {
+ 0xEA, 0x2A, 0x79, 0x31, 0x40, 0x82, 0x0F, 0x7A, 0x12, 0x8B, 0x8E, 0xB7, 0x0A, 0x94, 0x39, 0xF9,
+ 0x32, 0x57, 0xC6, 0xE6, 0xE7, 0x9B, 0x4A, 0x54, 0x0D, 0x29, 0x1D, 0x6D, 0xAE, 0x70, 0x98, 0xD7,
+ },
+ }};
+
+ 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[32];
+ parallelhash128_xof_once(params, tests[i].msg, tests[i].len, got, sizeof(got));
+
+ // check
+ if (memcmp(got, tests[i].exp, sizeof(got))) {
+ fprintf(stderr, "test_parallelhash128_xof(\"%s\") failed, got:\n", tests[i].name);
+ dump_hex(stderr, got, 32);
+
+ fprintf(stderr, "exp:\n");
+ dump_hex(stderr, tests[i].exp, 32);
+ }
+ }
+}
+
int main(void) {
test_theta();
test_rho();
@@ -3652,6 +3915,8 @@ int main(void) {
test_tuplehash256();
test_tuplehash128_xof();
test_tuplehash256_xof();
+ test_parallelhash128();
+ test_parallelhash128_xof();
printf("ok\n");
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 04:04:18 +0000