/*
* 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
}
