fips202x2.h

/*=============================================================================
 * Copyright (c) 2020 by Cryptographic Engineering Research Group (CERG)
 * ECE Department, George Mason University
 * Fairfax, VA, U.S.A.
 * Author: Duc Tri Nguyen
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
=============================================================================*/
#ifndef FIPS202X2_H
#define FIPS202X2_H

#include <stddef.h>
#include <arm_neon.h>

typedef uint64x2_t v128;

#define SHAKE128_RATE 168
#define SHAKE256_RATE 136
#define SHA3_256_RATE 136
#define SHA3_512_RATE 72


typedef struct {
  v128 s[25];
} keccakx2_state;

void KeccakF1600_StatePermutex2(v128 state[25]);

void shake128x2_absorb(keccakx2_state *state,
                       const uint8_t *in0,
                       const uint8_t *in1,
                       size_t inlen);

void shake128x2_squeezeblocks(uint8_t *out0,
                              uint8_t *out1,
                              size_t nblocks,
                              keccakx2_state *state);

void shake256x2_absorb(keccakx2_state *state,
                       const uint8_t *in0,
                       const uint8_t *in1,
                       size_t inlen);

void shake256x2_squeezeblocks(uint8_t *out0,
                              uint8_t *out1,
                              size_t nblocks,
                              keccakx2_state *state);

void shake128x2(uint8_t *out0,
                uint8_t *out1,
                size_t outlen,
                const uint8_t *in0,
                const uint8_t *in1,
                size_t inlen);

void shake256x2(uint8_t *out0,
                uint8_t *out1,
                size_t outlen,
                const uint8_t *in0,
                const uint8_t *in1,
                size_t inlen);

void sha3_256x2(uint8_t h1[32],
                uint8_t h2[32],
                const uint8_t *in1,
                const uint8_t *in2,
                size_t inlen);

void sha3_512x2(uint8_t h1[64],
                uint8_t h2[64],
                const uint8_t *in1,
                const uint8_t *in2,
                size_t inlen);

#endif