/* * Generate a hash from the given input with the sha3 algorithm with * a given outputLength * * out output array with size >= outputLength * outputLength the length of the hash to be generated. (there are * some restrictions on this length, but still need to * figure out which ones.) * in the input data used to generate the hash from * inputLength the length of the input data */ void hash(unsigned char *out, const unsigned int outputLength, const unsigned char *in, const unsigned int inputLength) { if(initHash != 1){ sha3_256_init(&ctx); initHash = 1; } sha3_256_update(&ctx, inputLength, in); sha3_256_digest(&ctx, outputLength, out); }
static int calc_steps_and_compare_hash_256(const uint8_t *msg1, size_t msg1_len, const uint8_t *msg2, size_t msg2_len, const uint8_t *expected) { static unsigned char hash[SHA3_256_DIGEST_LENGTH]; keccak_state_t state; sha3_256_init(&state); sha3_update(&state, msg1, msg1_len); sha3_update(&state, msg2, msg2_len); sha3_256_final(&state, hash); return (memcmp(expected, hash, sizeof(hash)) == 0); }
int sha3_256_test(void) { #ifndef LTC_TEST return CRYPT_NOP; #else unsigned char buf[200], hash[256 / 8]; int i; hash_state c; const unsigned char c1 = 0xa3; const unsigned char sha3_256_empty[256 / 8] = { 0xa7, 0xff, 0xc6, 0xf8, 0xbf, 0x1e, 0xd7, 0x66, 0x51, 0xc1, 0x47, 0x56, 0xa0, 0x61, 0xd6, 0x62, 0xf5, 0x80, 0xff, 0x4d, 0xe4, 0x3b, 0x49, 0xfa, 0x82, 0xd8, 0x0a, 0x4b, 0x80, 0xf8, 0x43, 0x4a }; const unsigned char sha3_256_0xa3_200_times[256 / 8] = { 0x79, 0xf3, 0x8a, 0xde, 0xc5, 0xc2, 0x03, 0x07, 0xa9, 0x8e, 0xf7, 0x6e, 0x83, 0x24, 0xaf, 0xbf, 0xd4, 0x6c, 0xfd, 0x81, 0xb2, 0x2e, 0x39, 0x73, 0xc6, 0x5f, 0xa1, 0xbd, 0x9d, 0xe3, 0x17, 0x87 }; XMEMSET(buf, c1, sizeof(buf)); /* SHA3-256 on an empty buffer */ sha3_256_init(&c); sha3_done(&c, hash); if (compare_testvector(hash, sizeof(hash), sha3_256_empty, sizeof(sha3_256_empty), "SHA3-256", 0)) { return CRYPT_FAIL_TESTVECTOR; } /* SHA3-256 as a single buffer. [FIPS 202] */ sha3_256_init(&c); sha3_process(&c, buf, sizeof(buf)); sha3_done(&c, hash); if (compare_testvector(hash, sizeof(hash), sha3_256_0xa3_200_times, sizeof(sha3_256_0xa3_200_times), "SHA3-256", 1)) { return CRYPT_FAIL_TESTVECTOR; } /* SHA3-256 in two steps. [FIPS 202] */ sha3_256_init(&c); sha3_process(&c, buf, sizeof(buf) / 2); sha3_process(&c, buf + sizeof(buf) / 2, sizeof(buf) / 2); sha3_done(&c, hash); if (compare_testvector(hash, sizeof(hash), sha3_256_0xa3_200_times, sizeof(sha3_256_0xa3_200_times), "SHA3-256", 2)) { return CRYPT_FAIL_TESTVECTOR; } /* SHA3-256 byte-by-byte: 200 steps. [FIPS 202] */ i = 200; sha3_256_init(&c); while (i--) { sha3_process(&c, &c1, 1); } sha3_done(&c, hash); if (compare_testvector(hash, sizeof(hash), sha3_256_0xa3_200_times, sizeof(sha3_256_0xa3_200_times), "SHA3-256", 3)) { return CRYPT_FAIL_TESTVECTOR; } /* SHA3-256 byte-by-byte: 135 bytes. Input from [Keccak]. Output * matched with sha3sum. */ sha3_256_init(&c); sha3_process(&c, (unsigned char*) "\xb7\x71\xd5\xce\xf5\xd1\xa4\x1a" "\x93\xd1\x56\x43\xd7\x18\x1d\x2a" "\x2e\xf0\xa8\xe8\x4d\x91\x81\x2f" "\x20\xed\x21\xf1\x47\xbe\xf7\x32" "\xbf\x3a\x60\xef\x40\x67\xc3\x73" "\x4b\x85\xbc\x8c\xd4\x71\x78\x0f" "\x10\xdc\x9e\x82\x91\xb5\x83\x39" "\xa6\x77\xb9\x60\x21\x8f\x71\xe7" "\x93\xf2\x79\x7a\xea\x34\x94\x06" "\x51\x28\x29\x06\x5d\x37\xbb\x55" "\xea\x79\x6f\xa4\xf5\x6f\xd8\x89" "\x6b\x49\xb2\xcd\x19\xb4\x32\x15" "\xad\x96\x7c\x71\x2b\x24\xe5\x03" "\x2d\x06\x52\x32\xe0\x2c\x12\x74" "\x09\xd2\xed\x41\x46\xb9\xd7\x5d" "\x76\x3d\x52\xdb\x98\xd9\x49\xd3" "\xb0\xfe\xd6\xa8\x05\x2f\xbb", 1080 / 8); sha3_done(&c, hash); if(compare_testvector(hash, sizeof(hash), "\xa1\x9e\xee\x92\xbb\x20\x97\xb6" "\x4e\x82\x3d\x59\x77\x98\xaa\x18" "\xbe\x9b\x7c\x73\x6b\x80\x59\xab" "\xfd\x67\x79\xac\x35\xac\x81\xb5", 256 / 8, "SHA3-256", 4)) { return CRYPT_FAIL_TESTVECTOR; } return CRYPT_OK; #endif }