lib/liboqs/src/sig/dilithium/pqcrystals-dilithium_dilithium5_ref/symmetric-shake.c


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#include <stdint.h>
#include "params.h"
#include "symmetric.h"
#include "fips202.h"

void dilithium_shake128_stream_init(shake128incctx *state, const uint8_t seed[SEEDBYTES], uint16_t nonce)
{
  uint8_t t[2];
  t[0] = nonce;
  t[1] = nonce >> 8;

  shake128_inc_init(state);
  shake128_inc_absorb(state, seed, SEEDBYTES);
  shake128_inc_absorb(state, t, 2);
  shake128_inc_finalize(state);
}

void dilithium_shake256_stream_init(shake256incctx *state, const uint8_t seed[CRHBYTES], uint16_t nonce)
{
  uint8_t t[2];
  t[0] = nonce;
  t[1] = nonce >> 8;

  shake256_inc_init(state);
  shake256_inc_absorb(state, seed, CRHBYTES);
  shake256_inc_absorb(state, t, 2);
  shake256_inc_finalize(state);
}