symmetric.h

/*
 * Implementors: EagleSign Team
 * This implementation is highly inspired from Dilithium and
 * Falcon Signatures' implementations
 */

#ifndef SYMMETRIC_H
#define SYMMETRIC_H

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

typedef keccak_state stream128_state;
typedef keccak_state stream256_state;

#define eaglesign_shake128_stream_init EAGLESIGN_NAMESPACE(eaglesign_shake128_stream_init)
void eaglesign_shake128_stream_init(keccak_state *state,
                                    const uint8_t seed[SEEDBYTES],
                                    uint16_t nonce);

#define eaglesign_shake256_stream_init EAGLESIGN_NAMESPACE(eaglesign_shake256_stream_init)
void eaglesign_shake256_stream_init(keccak_state *state,
                                    const uint8_t seed[CRHBYTES],
                                    uint16_t nonce);

#define STREAM128_BLOCKBYTES SHAKE128_RATE
#define STREAM256_BLOCKBYTES SHAKE256_RATE

#define stream128_init(STATE, SEED, NONCE) \
        eaglesign_shake128_stream_init(STATE, SEED, NONCE)
#define stream128_squeezeblocks(OUT, OUTBLOCKS, STATE) \
        shake128_squeezeblocks(OUT, OUTBLOCKS, STATE)
#define stream256_init(STATE, SEED, NONCE) \
        eaglesign_shake256_stream_init(STATE, SEED, NONCE)
#define stream256_squeezeblocks(OUT, OUTBLOCKS, STATE) \
        shake256_squeezeblocks(OUT, OUTBLOCKS, STATE)

#endif