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/* See LICENSE file for copyright and license details. */
#include "common.h"
size_t
libsha2_marshal(const struct libsha2_state *restrict state, void *restrict buf_)
{
unsigned char *restrict buf = buf_;
size_t off = 0;
if (buf)
memcpy(buf, &(int){1}, sizeof(int));
off += sizeof(int);
if (buf)
memcpy(&buf[off], &state->algorithm, sizeof(enum libsha2_algorithm));
off += sizeof(enum libsha2_algorithm);
if (buf)
memcpy(&buf[off], &state->message_size, sizeof(size_t));
off += sizeof(size_t);
if (state->algorithm <= LIBSHA2_256) {
if (buf)
memcpy(&buf[off], state->k.b32, sizeof(state->k.b32));
off += sizeof(state->k.b32);
if (buf)
memcpy(&buf[off], state->h.b32, sizeof(state->h.b32));
off += sizeof(state->h.b32);
} else {
if (buf)
memcpy(&buf[off], state->k.b64, sizeof(state->k.b64));
off += sizeof(state->k.b64);
if (buf)
memcpy(&buf[off], state->h.b64, sizeof(state->h.b64));
off += sizeof(state->h.b64);
}
if (buf)
memcpy(&buf[off], &state->chunk_size, sizeof(size_t));
off += sizeof(size_t);
if (buf)
memcpy(&buf[off], state->chunk, (state->message_size / 8) % state->chunk_size);
off += (state->message_size / 8) % state->chunk_size;
return off;
}
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