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/* See LICENSE file for copyright and license details. */
#include "common.h"
static void
encode_uint64_le(unsigned char *out, uint_least64_t value, size_t bytes)
{
switch (bytes) {
default:
out[7] = (unsigned char)((value >> 56) & 255);
/* fall through */
case 7:
out[6] = (unsigned char)((value >> 48) & 255);
/* fall through */
case 6:
out[5] = (unsigned char)((value >> 40) & 255);
/* fall through */
case 5:
out[4] = (unsigned char)((value >> 32) & 255);
/* fall through */
case 4:
out[3] = (unsigned char)((value >> 24) & 255);
/* fall through */
case 3:
out[2] = (unsigned char)((value >> 16) & 255);
/* fall through */
case 2:
out[1] = (unsigned char)((value >> 8) & 255);
/* fall through */
case 1:
out[0] = (unsigned char)((value >> 0) & 255);
/* fall through */
case 0:
break;
}
}
void
libblake_blake2b_digest(struct libblake_blake2b_state *state, void *data_, size_t len,
size_t output_len, unsigned char output[static output_len])
{
unsigned char *data = data_;
size_t r, i, j;
r = libblake_blake2b_update(state, data, len);
data = &data[r];
len -= r;
state->f[0] = UINT_LEAST64_C(0xFFFFffffFFFFffff);
memset(&data[len], 0, 128 - len);
state->t[0] = (state->t[0] + len) & UINT_LEAST64_C(0xFFFFffffFFFFffff);
if (state->t[0] < len)
state->t[1] = (state->t[1] + 1) & UINT_LEAST64_C(0xFFFFffffFFFFffff);
libblake_internal_blake2b_compress(state, data);
for (i = 0, j = 0; i < output_len; i += 8, j += 1)
encode_uint64_le(&output[i], state->h[j], output_len - i);
}
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