void norx_decrypt_data(norx_state_t state, unsigned char *out, const unsigned char * in, size_t inlen)
{
if (inlen > 0)
{
size_t lane = 0;
norx_state_t sum;
norx_state_t state2;
memset(sum, 0, sizeof(norx_state_t));
while (inlen >= BYTES(NORX_R))
{
/* branch */
memcpy(state2, state, sizeof(norx_state_t));
norx_branch(state2, lane++);
/* decrypt */
norx_decrypt_block(state2, out, in);
#if defined(NORX_DEBUG)
printf("Decrypt block (lane: %lu)\n", lane - 1);
norx_debug(state2, in, BYTES(NORX_R), out, BYTES(NORX_R));
#endif
/* merge */
norx_merge(sum, state2);
inlen -= BYTES(NORX_R);
in += BYTES(NORX_R);
out += BYTES(NORX_R);
}
/* last block, 0 <= inlen < BYTES(NORX_R) */
/* branch */
memcpy(state2, state, sizeof(norx_state_t));
norx_branch(state2, lane++);
/* decrypt */
norx_decrypt_lastblock(state2, out, in, inlen);
#if defined(NORX_DEBUG)
printf("Decrypt lastblock (lane: %lu)\n", lane - 1);
norx_debug(state2, in, inlen, out, inlen);
#endif
/* merge */
norx_merge(sum, state2);
memcpy(state, sum, sizeof(norx_state_t));
burn(state2, 0, sizeof(norx_state_t));
burn(sum, 0, sizeof(norx_state_t));
#if defined(NORX_DEBUG)
printf("Decryption finalised\n");
norx_debug(state, NULL, 0, NULL, 0);
#endif
}
}
void norx_decrypt_msg(norx_state_t state, unsigned char *out, const unsigned char * in, size_t inlen)
{
if(inlen > 0)
{
uint8_t emptyblock[BYTES(RATE)];
norx_state_t sum;
norx_state_t state2;
size_t lane = 0;
norx_pad(emptyblock, emptyblock, 0);
memset(sum, 0, sizeof(norx_state_t));
while (inlen >= BYTES(RATE))
{
/* branch */
memcpy(state2, state, sizeof(norx_state_t));
norx_branch(state2, lane++);
/* decrypt */
norx_decrypt_block(state2, out, in);
/* empty padding */
norx_absorb(state2, emptyblock, PAYLOAD_TAG);
/* merge */
norx_merge(sum, state2);
inlen -= BYTES(RATE);
in += BYTES(RATE);
out += BYTES(RATE);
}
/* last block, 0 < inlen < BYTES(RATE) */
if(inlen > 0)
{
/* branch */
memcpy(state2, state, sizeof(norx_state_t));
norx_branch(state2, lane++);
/* decrypt */
norx_decrypt_lastblock(state2, out, in, inlen);
/* merge */
norx_merge(sum, state2);
}
memcpy(state, sum, sizeof(norx_state_t));
}
}
void norx_encrypt_msg(norx_state_t state, unsigned char *out, const unsigned char * in, size_t inlen)
{
if(inlen > 0)
{
norx_state_t lane[NORX_D];
uint8_t emptyblock[BYTES(RATE)];
size_t i, j;
/* Initialize states + branch */
for(i = 0; i < NORX_D; ++i)
{
memcpy(lane[i], state, sizeof lane[i]);
norx_branch(lane[i], i);
}
/* parallel payload processing */
for(i = 0; inlen >= BYTES(RATE); ++i)
{
norx_encrypt_block(lane[i%NORX_D], out, in);
inlen -= BYTES(RATE);
out += BYTES(RATE);
in += BYTES(RATE);
}
norx_encrypt_lastblock(lane[i++%NORX_D], out, in, inlen);
/* Pad remaining blocks */
norx_pad(emptyblock, emptyblock, 0);
for(j = 0; j < (NORX_D-1); ++j, ++i)
{
norx_absorb(lane[i%NORX_D], emptyblock, PAYLOAD_TAG);
}
/* Merge */
memset(state, 0, sizeof(norx_state_t));
for(i = 0; i < NORX_D; ++i)
{
#if defined(NORX_DEBUG)
printf("End of payload processing (lane %lu) \n", i);
norx_print_state(lane[i]);
#endif
norx_merge(state, lane[i]);
burn(lane[i], 0, sizeof(norx_state_t));
}
#if defined(NORX_DEBUG)
printf("End of merging:\n");
norx_print_state(state);
#endif
}
}
void norx_decrypt_data(norx_state_t state, unsigned char *out, const unsigned char * in, size_t inlen)
{
if (inlen > 0)
{
size_t i;
norx_state_t lane[NORX_P];
/* Initialize states + branch */
for (i = 0; i < NORX_P; ++i) {
memcpy(lane[i], state, sizeof lane[i]);
norx_branch(lane[i], i);
}
/* Parallel payload processing */
for (i = 0; inlen >= BYTES(NORX_R); ++i) {
norx_decrypt_block(lane[i%NORX_P], out, in);
#if defined(NORX_DEBUG)
printf("Decrypt block (lane: %lu)\n", i%NORX_P);
norx_debug(lane[i%NORX_P], in, BYTES(NORX_R), out, BYTES(NORX_R));
#endif
inlen -= BYTES(NORX_R);
out += BYTES(NORX_R);
in += BYTES(NORX_R);
}
norx_decrypt_lastblock(lane[i%NORX_P], out, in, inlen);
#if defined(NORX_DEBUG)
printf("Decrypt lastblock (lane: %lu)\n", i%NORX_P);
norx_debug(lane[i%NORX_P], in, inlen, out, inlen);
#endif
/* Merge */
memset(state, 0, sizeof(norx_state_t));
for (i = 0; i < NORX_P; ++i) {
norx_merge(state, lane[i]);
burn(lane[i], 0, sizeof(norx_state_t));
}
#if defined(NORX_DEBUG)
printf("Decryption finalised\n");
norx_debug(state, NULL, 0, NULL, 0);
#endif
}
}
