Beispiel #1
0
/**
   Terminate the hash to get the digest
   @param md  The hash state
   @param out [out] The destination of the hash (64 bytes)
   @return CRYPT_OK if successful
*/
int whirlpool_done(hash_state * md, unsigned char *out)
{
    int i;

    LTC_ARGCHK(md  != NULL);
    LTC_ARGCHK(out != NULL);

    if (md->whirlpool.curlen >= sizeof(md->whirlpool.buf)) {
       return CRYPT_INVALID_ARG;
    }

    /* increase the length of the message */
    md->whirlpool.length += md->whirlpool.curlen * 8;

    /* append the '1' bit */
    md->whirlpool.buf[md->whirlpool.curlen++] = (unsigned char)0x80;

    /* if the length is currently above 32 bytes we append zeros
     * then compress.  Then we can fall back to padding zeros and length
     * encoding like normal.
     */
    if (md->whirlpool.curlen > 32) {
        while (md->whirlpool.curlen < 64) {
            md->whirlpool.buf[md->whirlpool.curlen++] = (unsigned char)0;
        }
        whirlpool_compress(md, md->whirlpool.buf);
        md->whirlpool.curlen = 0;
    }

    /* pad upto 56 bytes of zeroes (should be 32 but we only support 64-bit lengths)  */
    while (md->whirlpool.curlen < 56) {
        md->whirlpool.buf[md->whirlpool.curlen++] = (unsigned char)0;
    }

    /* store length */
    STORE64H(md->whirlpool.length, md->whirlpool.buf+56);
    whirlpool_compress(md, md->whirlpool.buf);

    /* copy output */
    for (i = 0; i < 8; i++) {
        STORE64H(md->whirlpool.state[i], out+(8*i));
    }
#ifdef LTC_CLEAN_STACK
    zeromem(md, sizeof(*md));
#endif
    return CRYPT_OK;
}
int main(void) {
	// Self-check
	if (!self_check()) {
		printf("Self-check failed\n");
		return EXIT_FAILURE;
	}
	printf("Self-check passed\n");
	
	// Benchmark speed
	uint8_t state[STATE_LEN] = {0};
	uint8_t block[BLOCK_LEN] = {0};
	const long ITERS = 1000000;
	clock_t start_time = clock();
	for (long i = 0; i < ITERS; i++)
		whirlpool_compress(state, block);
	printf("Speed: %.1f MB/s\n", (double)ITERS * (sizeof(block) / sizeof(block[0]))
		/ (clock() - start_time) * CLOCKS_PER_SEC / 1000000);
	
	return EXIT_SUCCESS;
}