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/* See LICENSE file for copyright and license details. */
#include "common.h"
static void
encode_uint64_be(unsigned char *out, uint_least64_t value)
{
out[0] = (unsigned char)((value >> 56) & 255);
out[1] = (unsigned char)((value >> 48) & 255);
out[2] = (unsigned char)((value >> 40) & 255);
out[3] = (unsigned char)((value >> 32) & 255);
out[4] = (unsigned char)((value >> 24) & 255);
out[5] = (unsigned char)((value >> 16) & 255);
out[6] = (unsigned char)((value >> 8) & 255);
out[7] = (unsigned char)((value >> 0) & 255);
}
void
libblake_internal_blakeb_digest(struct libblake_blakeb_state *state, unsigned char *data, size_t len,
size_t bits, const char *suffix, unsigned char *output, size_t words_out)
{
size_t r, i;
unsigned char pad;
uint_least64_t t0, t1;
len += bits >> 3;
bits &= 7;
if (suffix) {
while (*suffix) {
data[len] |= (unsigned char)((*suffix++ & 1) << bits++);
if (bits == 8) {
bits = 0;
data[++len] = 0;
}
}
}
r = libblake_internal_blakeb_update(state, data, len);
data = &data[r];
len -= r;
pad = 0x80 >> bits;
data[len] &= (unsigned char)(255U - (pad - 1U));
data[len] |= pad;
bits += len << 3;
t0 = state->t[0] + (uint_least64_t)bits;
t1 = state->t[1];
if (!bits) {
state->t[0] = UINT_LEAST64_C(0xFFFFffffFFFFfc00);
state->t[1] = UINT_LEAST64_C(0xFFFFffffFFFFffff);
} else if (!state->t[0]) {
state->t[0] = UINT_LEAST64_C(0xFFFFffffFFFFfc00) + (uint_least64_t)bits;
state->t[1] = (state->t[1] - 1) & UINT_LEAST64_C(0xFFFFffffFFFFffff);
} else {
state->t[1] -= (uint_least64_t)(1024U - bits);
}
if (bits < 1024 - (1 + 2 * 64)) {
memset(&data[len + 1], 0, (1024 - 2 * 64) / 8 - 1 - len);
} else {
memset(&data[len + 1], 0, 1024 / 8 - 1 - len);
data += libblake_internal_blakeb_update(state, data, 1024 / 8);
state->t[0] = UINT_LEAST64_C(0xFFFFffffFFFFfc00);
state->t[1] = UINT_LEAST64_C(0xFFFFffffFFFFffff);
memset(data, 0, (1024 - 2 * 64) / 8 - len);
}
if (words_out == 8)
data[(1024 - 2 * 64) / 8 - 1] |= 1;
encode_uint64_be(&data[(1024 - 2 * 64) / 8], t1);
encode_uint64_be(&data[(1024 - 1 * 64) / 8], t0);
libblake_internal_blakeb_update(state, data, 1024 / 8);
for (i = 0; i < words_out; i++)
encode_uint64_be(&output[i * 8], state->h[i]);
}
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