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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifdef SUPPORT_BLAKE512
LIBHASHSUM_1_NONNULL_
static size_t
process(struct libhashsum_hasher *this, const void *data, size_t bytes)
{
return libblake_blake512_update(&this->state.blake512.s, data, bytes);
}
LIBHASHSUM_1_NONNULL_
static int
finalise_const(struct libhashsum_hasher *this, const void *data, size_t bytes, unsigned extra_bits)
{
const uint8_t *m = data;
size_t r;
if (extra_bits > 7U) {
errno = EINVAL;
return -1;
}
r = libblake_blake512_update(&this->state.blake512.s, data, bytes);
m = &m[r];
bytes -= r;
memcpy(this->state.blake512.buf, m, bytes + (size_t)(extra_bits > 0U));
if (extra_bits)
this->state.blake512.buf[bytes] = libhashsum_reverse_byte__(this->state.blake512.buf[bytes]);
libblake_blake512_digest(&this->state.blake512.s, this->state.blake512.buf, bytes,
extra_bits, NULL, this->state.blake512.buf);
memset(&this->state.blake512.s, 0, sizeof(this->state.blake512.s));
this->hash_output = this->state.blake512.buf;
return 0;
}
LIBHASHSUM_1_NONNULL_
static int
finalise(struct libhashsum_hasher *this, void *data, size_t bytes, unsigned extra_bits, size_t size)
{
uint8_t *m = data;
size_t r;
if (extra_bits > 7U) {
errno = EINVAL;
return -1;
}
r = libblake_blake512_update(&this->state.blake512.s, data, bytes);
m = &m[r];
bytes -= r;
size -= r;
if (size < libblake_blake512_digest_get_required_input_size(bytes, extra_bits, NULL)) {
memcpy(this->state.blake512.buf, m, bytes + (size_t)(extra_bits > 0U));
m = this->state.blake512.buf;
}
if (extra_bits)
m[bytes] = libhashsum_reverse_byte__(m[bytes]);
libblake_blake512_digest(&this->state.blake512.s, m, bytes, extra_bits, NULL, this->state.blake512.buf);
memset(&this->state.blake512.s, 0, sizeof(this->state.blake512.s));
this->hash_output = this->state.blake512.buf;
return 0;
}
int
libhashsum_init_blake512_hasher(struct libhashsum_hasher *this)
{
libblake_init();
this->algorithm = LIBHASHSUM_BLAKE512;
this->algorithm_string = "BLAKE512";
this->input_block_size = 128U;
this->hash_size = LIBHASHSUM_BLAKE512_HASH_SIZE;
this->hash_output = NULL;
this->supports_non_whole_bytes = 1;
this->process = &process;
this->finalise_const = &finalise_const;
this->finalise = &finalise;
this->destroy = NULL;
libblake_blake512_init2(&this->state.blake512.s, NULL);
return 0;
}
#else
int
libhashsum_init_blake512_hasher(struct libhashsum_hasher *this)
{
(void) this;
errno = ENOSYS;
return -1;
}
#endif
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