inline uint32_t hash_pad(uint8_t padblock[MD5_BLOCK_SIZE * 2], uint32_t total_len)
{
uint32_t i = total_len & (MD5_BLOCK_SIZE - 1);
// memset(&padblock[i], 0, MD5_BLOCK_SIZE);
memclr_fixedlen(&padblock[i], MD5_BLOCK_SIZE);
padblock[i] = 0x80;
i += ((MD5_BLOCK_SIZE - 1) & (0 - (total_len + MD5_PADLENGTHFIELD_SIZE + 1))) + 1 +
MD5_PADLENGTHFIELD_SIZE;
*((uint64_t *) & padblock[i - 8]) = (total_len << 3);
return i >> MD5_LOG2_BLOCK_SIZE; // Number of extra blocks to hash
}
static inline uint32_t hash_pad(uint8_t padblock[SHA512_BLOCK_SIZE * 2], uint64_t total_len)
{
uint32_t i = (uint32_t) (total_len & (SHA512_BLOCK_SIZE - 1));
memclr_fixedlen(&padblock[i], SHA512_BLOCK_SIZE);
padblock[i] = 0x80;
// Move i to the end of either 1st or 2nd extra block depending on length
i += ((SHA512_BLOCK_SIZE - 1) & (0 - (total_len + SHA512_PADLENGTHFIELD_SIZE + 1))) +
1 + SHA512_PADLENGTHFIELD_SIZE;
#if SHA512_PADLENGTHFIELD_SIZE == 16
*((uint64_t *) & padblock[i - 16]) = 0;
#endif
*((uint64_t *) & padblock[i - 8]) = _byteswap_uint64((uint64_t) total_len << 3);
return i >> SHA512_LOG2_BLOCK_SIZE; // Number of extra blocks to hash
}