diff options
Diffstat (limited to 'sha3.c')
| -rw-r--r-- | sha3.c | 153 |
1 files changed, 153 insertions, 0 deletions
@@ -897,6 +897,68 @@ void kmac256_xof_once(const kmac_params_t params, const uint8_t * const src, con kmac256_xof_squeeze(&xof, dst, dst_len); } +static inline void tuplehash128_init(sha3_xof_t * const xof, const tuplehash_params_t params, const size_t dst_len) { + static const uint8_t NAME[] = { 'T', 'u', 'p', 'l', 'e', 'H', 'a', 's', 'h' }; + + // build cshake128 params + const cshake_params_t cshake_params = { + .name = NAME, + .name_len = sizeof(NAME), + .custom = params.custom, + .custom_len = params.custom_len, + }; + + // init xof + cshake128_xof_init(xof, cshake_params); + + // absorb tuples + // FIXME: length counter in 800-185 is wrong here + for (size_t i = 0; i < params.num_strs; i++) { + // absorb length + uint8_t buf[9] = { 0 }; + const size_t buf_len = encode_string_prefix(buf, params.strs[i].len); + (void) cshake128_xof_absorb(xof, buf, buf_len); + + // absorb content + if (params.strs[i].len > 0) { + (void) cshake128_xof_absorb(xof, params.strs[i].ptr, params.strs[i].len); + } + } + + // build output length suffix + uint8_t suffix_buf[9] = { 0 }; + const size_t suffix_buf_len = right_encode(suffix_buf, dst_len << 3); + + // absorb output length suffix + (void) cshake128_xof_absorb(xof, suffix_buf, suffix_buf_len); +} + +void tuplehash128(const tuplehash_params_t params, uint8_t * const dst, const size_t dst_len) { + // init + sha3_xof_t xof; + tuplehash128_init(&xof, params, dst_len); + + // squeeze + cshake128_xof_squeeze(&xof, dst, dst_len); +} + +void tuplehash128_xof_init(sha3_xof_t * const xof, const tuplehash_params_t params) { + tuplehash128_init(xof, params, 0); +} + +void tuplehash128_xof_squeeze(sha3_xof_t * const xof, uint8_t * const dst, const size_t dst_len) { + cshake128_xof_squeeze(xof, dst, dst_len); +} + +void tuplehash128_xof_once(const tuplehash_params_t params, uint8_t * const dst, const size_t dst_len) { + // init xof + sha3_xof_t xof; + tuplehash128_xof_init(&xof, params); + + // squeeze + cshake128_xof_squeeze(&xof, dst, dst_len); +} + #ifdef SHA3_TEST #include <stdio.h> // printf() @@ -3125,6 +3187,96 @@ static void test_kmac256_xof(void) { } } +static void test_tuplehash128(void) { + static const struct { + const char *name; // test name + const uint8_t data[256]; // string data + const size_t pairs[10]; // string ofs/len pairs + const size_t num_strs; // number of strings + const uint8_t custom[256]; // custom name + const size_t custom_len; // custom name length + const uint8_t exp[32]; // expected hash + } tests[] = {{ + // https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/TupleHash_samples.pdf + .name = "TupleHash Sample #1", + .data = { 0x00, 0x01, 0x02, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15 }, + .pairs = { + 0, 3, + 3, 6, + }, + .num_strs = 2, + .custom = "", + .custom_len = 0, + .exp = { + 0xC5, 0xD8, 0x78, 0x6C, 0x1A, 0xFB, 0x9B, 0x82, 0x11, 0x1A, 0xB3, 0x4B, 0x65, 0xB2, 0xC0, 0x04, + 0x8F, 0xA6, 0x4E, 0x6D, 0x48, 0xE2, 0x63, 0x26, 0x4C, 0xE1, 0x70, 0x7D, 0x3F, 0xFC, 0x8E, 0xD1, + }, + }, { + .name = "TupleHash Sample #2", + .data = { 0x00, 0x01, 0x02, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15 }, + .pairs = { + 0, 3, + 3, 6, + }, + .num_strs = 2, + .custom = "My Tuple App", + .custom_len = 12, + .exp = { + 0x75, 0xCD, 0xB2, 0x0F, 0xF4, 0xDB, 0x11, 0x54, 0xE8, 0x41, 0xD7, 0x58, 0xE2, 0x41, 0x60, 0xC5, + 0x4B, 0xAE, 0x86, 0xEB, 0x8C, 0x13, 0xE7, 0xF5, 0xF4, 0x0E, 0xB3, 0x55, 0x88, 0xE9, 0x6D, 0xFB, + }, + }, { + .name = "TupleHash Sample #3", + .data = { + 0x00, 0x01, 0x02, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, + }, + .pairs = { + 0, 3, + 3, 6, + 9, 9, + }, + .num_strs = 3, + .custom = "My Tuple App", + .custom_len = 12, + .exp = { + 0xE6, 0x0F, 0x20, 0x2C, 0x89, 0xA2, 0x63, 0x1E, 0xDA, 0x8D, 0x4C, 0x58, 0x8C, 0xA5, 0xFD, 0x07, + 0xF3, 0x9E, 0x51, 0x51, 0x99, 0x8D, 0xEC, 0xCF, 0x97, 0x3A, 0xDB, 0x38, 0x04, 0xBB, 0x6E, 0x84, + }, + }}; + + for (size_t i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) { + // build strings + tuplehash_str_t strs[10] = { 0 }; + for (size_t j = 0; j < tests[i].num_strs; j++) { + strs[j].ptr = tests[i].data + tests[i].pairs[2 * j]; + strs[j].len = tests[i].pairs[2 * j + 1]; + } + + // build params + const tuplehash_params_t params = { + .strs = strs, + .num_strs = tests[i].num_strs, + .custom = tests[i].custom, + .custom_len = tests[i].custom_len, + }; + + // run + uint8_t got[32]; + tuplehash128(params, got, sizeof(got)); + + // check + if (memcmp(got, tests[i].exp, sizeof(got))) { + fprintf(stderr, "test_tuplehash128(\"%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(); @@ -3152,6 +3304,7 @@ int main(void) { test_kmac256(); test_kmac128_xof(); test_kmac256_xof(); + test_tuplehash128(); printf("ok\n"); } |