/* Based on the public domain implementation in crypto_hash/keccakc512/simple/ from
* http://bench.cr.yp.to/supercop.html by Ronny Van Keer and the public domain "TweetFips202"
* implementation from https://twitter.com/tweetfips202 by Gilles Van Assche, Daniel J. Bernstein,
* and Peter Schwabe */
#include <stddef.h>
#include <stdint.h>
#include "fips202.h"
#define NROUNDS 24
#define ROL(a, offset) ((a << offset) ^ (a >> (64-offset)))
/*************************************************
* Name: load64
*
* Description: Load 8 bytes into uint64_t in little-endian order
*
* Arguments: - const uint8_t *x: pointer to input byte array
*
* Returns the loaded 64-bit unsigned integer
**************************************************/
static uint64_t load64(const uint8_t x[8]) {
unsigned int i;
uint64_t r = 0;
for(i=0;i<8;i++)
r |= (uint64_t)x[i] << 8*i;
return r;
}
/*************************************************
* Name: store64
*
* Description: Store a 64-bit integer to array of 8 bytes in little-endian order
*
* Arguments: - uint8_t *x: pointer to the output byte array (allocated)
* - uint64_t u: input 64-bit unsigned integer
**************************************************/
static void store64(uint8_t x[8], uint64_t u) {
unsigned int i;
for(i=0;i<8;i++)
x[i] = u >> 8*i;
}
/* Keccak round constants */
static const uint64_t KeccakF_RoundConstants[NROUNDS] = {
(uint64_t)0x0000000000000001ULL,
(uint64_t)0x0000000000008082ULL,
(uint64_t)0x800000000000808aULL,
(uint64_t)0x8000000080008000ULL,
(uint64_t)0x000000000000808bULL,
(uint64_t)0x0000000080000001ULL,
(uint64_t)0x8000000080008081ULL,
(uint64_t)0x8000000000008009ULL,
(uint64_t)0x000000000000008aULL,
(uint64_t)0x0000000000000088ULL,
(uint64_t)0x0000000080008009ULL,
(uint64_t)0x000000008000000aULL,
(uint64_t)0x000000008000808bULL,
(uint64_t)0x800000000000008bULL,
(uint64_t)0x8000000000008089ULL,
(uint64_t)0x8000000000008003ULL,
(uint64_t)0x8000000000008002ULL,
(uint64_t)0x8000000000000080ULL,
(uint64_t)0x000000000000800aULL,
(uint64_t)0x800000008000000aULL,
(uint64_t)0x8000000080008081ULL,
(uint64_t)0x8000000000008080ULL,
(uint64_t)0x0000000080000001ULL,
(uint64_t)0x8000000080008008ULL
};
/*************************************************
* Name: KeccakF1600_StatePermute
*
* Description: The Keccak F1600 Permutation
*
* Arguments: - uint64_t *state: pointer to input/output Keccak state
**************************************************/
static void KeccakF1600_StatePermute(uint64_t state[25])
{
int round;
uint64_t Aba, Abe, Abi, Abo, Abu;
uint64_t Aga, Age, Agi, Ago, Agu;
uint64_t Aka, Ake, Aki, Ako, Aku;
uint64_t Ama, Ame, Ami, Amo, Amu;
uint64_t Asa, Ase, Asi, Aso, Asu;
uint64_t BCa, BCe, BCi, BCo, BCu;
uint64_t Da, De, Di, Do, Du;
uint64_t Eba, Ebe, Ebi, Ebo, Ebu;
uint64_t Ega, Ege, Egi, Ego, Egu;
uint64_t Eka, Eke, Eki, Eko, Eku;
uint64_t Ema, Eme, Emi, Emo, Emu;
uint64_t Esa, Ese, Esi, Eso, Esu;
//copyFromState(A, state)
Aba = state[ 0];
Abe = state[ 1];
Abi = state[ 2];
Abo = state[ 3];
Abu = state[ 4];
Aga = state[ 5];
Age = state[ 6];
Agi = state[ 7];
Ago = state[ 8];
Agu = state[ 9];
Aka = state[10];
Ake = state[11];
Aki = state[12];
Ako = state[13];
Aku = state[14];
Ama = state[15];
Ame = state[16];
Ami = state[17];
Amo = state[18];
Amu = state[19];
Asa = state[20];
Ase = state[21];
Asi = state[22];
Aso = state[23];
Asu = state[24];
for(round = 0; round < NROUNDS; round += 2) {
// prepareTheta
BCa = Aba^Aga^Aka^Ama^Asa;
BCe = Abe^Age^Ake^Ame^Ase;
BCi = Abi^Agi^Aki^Ami^Asi;
BCo = Abo^Ago^Ako^Amo^Aso;
BCu = Abu^Agu^Aku^Amu^Asu;
//thetaRhoPiChiIotaPrepareTheta(round, A, E)
Da = BCu^ROL(BCe, 1);
De = BCa^ROL(BCi, 1);
Di = BCe^ROL(BCo, 1);
Do = BCi^ROL(BCu, 1);
Du = BCo^ROL(BCa, 1);
Aba ^= Da;
BCa = Aba;
Age ^= De;
BCe = ROL(Age, 44);
Aki ^= Di;
BCi = ROL(Aki, 43);
Amo ^= Do;
BCo = ROL(Amo, 21);
Asu ^= Du;
BCu = ROL(Asu, 14);
Eba = BCa ^((~BCe)& BCi );
Eba ^= (uint64_t)KeccakF_RoundConstants[round];
Ebe = BCe ^((~BCi)& BCo );
Ebi = BCi ^((~BCo)& BCu );
Ebo = BCo ^((~BCu)& BCa );
Ebu = BCu ^((~BCa)& BCe );
Abo ^= Do;
BCa = ROL(Abo, 28);
Agu ^= Du;
BCe = ROL(Agu, 20);
Aka ^= Da;
BCi = ROL(Aka, 3);
Ame ^= De;
BCo = ROL(Ame, 45);
Asi ^= Di;
BCu = ROL(Asi, 61);
Ega = BCa ^((~BCe)& BCi );
Ege = BCe ^((~BCi)& BCo );
Egi = BCi ^((~BCo)& BCu );
Ego = BCo ^((~BCu)& BCa );
Egu = BCu ^((~BCa)& BCe );
Abe ^= De;
BCa = ROL(Abe, 1);
Agi ^= Di;
BCe = ROL(Agi, 6);
Ako ^= Do;
BCi = ROL(Ako, 25);
Amu ^= Du;
BCo = ROL(Amu, 8);
Asa ^= Da;
BCu = ROL(Asa, 18);
Eka = BCa ^((~BCe)& BCi );
Eke = BCe ^((~BCi)& BCo );
Eki = BCi ^((~BCo)& BCu );
Eko = BCo ^((~BCu)& BCa );
Eku = BCu ^((~BCa)& BCe );
Abu ^= Du;
BCa = ROL(Abu, 27);
Aga ^= Da;
BCe = ROL(Aga, 36);
Ake ^= De;
BCi = ROL(Ake, 10);
Ami ^= Di;
BCo = ROL(Ami, 15);
Aso ^= Do;
BCu = ROL(Aso, 56);
Ema = BCa ^((~BCe)& BCi );
Eme = BCe ^((~BCi)& BCo );
Emi = BCi ^((~BCo)& BCu );
Emo = BCo ^((~BCu)& BCa );
Emu = BCu ^((~BCa)& BCe );
Abi ^= Di;
BCa = ROL(Abi, 62);
Ago ^= Do;
BCe = ROL(Ago, 55);
Aku ^= Du;
BCi = ROL(Aku, 39);
Ama ^= Da;
BCo = ROL(Ama, 41);
Ase ^= De;
BCu = ROL(Ase, 2);
Esa = BCa ^((~BCe)& BCi );
Ese = BCe ^((~BCi)& BCo );
Esi = BCi ^((~BCo)& BCu );
Eso = BCo ^((~BCu)& BCa );
Esu = BCu ^((~BCa)& BCe );
// prepareTheta
BCa = Eba^Ega^Eka^Ema^Esa;
BCe = Ebe^Ege^Eke^Eme^Ese;
BCi = Ebi^Egi^Eki^Emi^Esi;
BCo = Ebo^Ego^Eko^Emo^Eso;
BCu = Ebu^Egu^Eku^Emu^Esu;
//thetaRhoPiChiIotaPrepareTheta(round+1, E, A)
Da = BCu^ROL(BCe, 1);
De = BCa^ROL(BCi, 1);
Di = BCe^ROL(BCo, 1);
Do = BCi^ROL(BCu, 1);
Du = BCo^ROL(BCa, 1);
Eba ^= Da;
BCa = Eba;
Ege ^= De;
BCe = ROL(Ege, 44);
Eki ^= Di;
BCi = ROL(Eki, 43);
Emo ^= Do;
BCo = ROL(Emo, 21);
Esu ^= Du;
BCu = ROL(Esu, 14);
Aba = BCa ^((~BCe)& BCi );
Aba ^= (uint64_t)KeccakF_RoundConstants[round+1];
Abe = BCe ^((~BCi)& BCo );
Abi = BCi ^((~BCo)& BCu );
Abo = BCo ^((~BCu)& BCa );
Abu = BCu ^((~BCa)& BCe );
Ebo ^= Do;
BCa = ROL(Ebo, 28);
Egu ^= Du;
BCe = ROL(Egu, 20);
Eka ^= Da;
BCi = ROL(Eka, 3);
Eme ^= De;
BCo = ROL(Eme, 45);
Esi ^= Di;
BCu = ROL(Esi, 61);
Aga = BCa ^((~BCe)& BCi );
Age = BCe ^((~BCi)& BCo );
Agi = BCi ^((~BCo)& BCu );
Ago = BCo ^((~BCu)& BCa );
Agu = BCu ^((~BCa)& BCe );
Ebe ^= De;
BCa = ROL(Ebe, 1);
Egi ^= Di;
BCe = ROL(Egi, 6);
Eko ^= Do;
BCi = ROL(Eko, 25);
Emu ^= Du;
BCo = ROL(Emu, 8);
Esa ^= Da;
BCu = ROL(Esa, 18);
Aka = BCa ^((~BCe)& BCi );
Ake = BCe ^((~BCi)& BCo );
Aki = BCi ^((~BCo)& BCu );
Ako = BCo ^((~BCu)& BCa );
Aku = BCu ^((~BCa)& BCe );
Ebu ^= Du;
BCa = ROL(Ebu, 27);
Ega ^= Da;
BCe = ROL(Ega, 36);
Eke ^= De;
BCi = ROL(Eke, 10);
Emi ^= Di;
BCo = ROL(Emi, 15);
Eso ^= Do;
BCu = ROL(Eso, 56);
Ama = BCa ^((~BCe)& BCi );
Ame = BCe ^((~BCi)& BCo );
Ami = BCi ^((~BCo)& BCu );
Amo = BCo ^((~BCu)& BCa );
Amu = BCu ^((~BCa)& BCe );
Ebi ^= Di;
BCa = ROL(Ebi, 62);
Ego ^= Do;
BCe = ROL(Ego, 55);
Eku ^= Du;
BCi = ROL(Eku, 39);
Ema ^= Da;
BCo = ROL(Ema, 41);
Ese ^= De;
BCu = ROL(Ese, 2);
Asa = BCa ^((~BCe)& BCi );
Ase = BCe ^((~BCi)& BCo );
Asi = BCi ^((~BCo)& BCu );
Aso = BCo ^((~BCu)& BCa );
Asu = BCu ^((~BCa)& BCe );
}
//copyToState(state, A)
state[ 0] = Aba;
state[ 1] = Abe;
state[ 2] = Abi;
state[ 3] = Abo;
state[ 4] = Abu;
state[ 5] = Aga;
state[ 6] = Age;
state[ 7] = Agi;
state[ 8] = Ago;
state[ 9] = Agu;
state[10] = Aka;
state[11] = Ake;
state[12] = Aki;
state[13] = Ako;
state[14] = Aku;
state[15] = Ama;
state[16] = Ame;
state[17] = Ami;
state[18] = Amo;
state[19] = Amu;
state[20] = Asa;
state[21] = Ase;
state[22] = Asi;
state[23] = Aso;
state[24] = Asu;
}
/*************************************************
* Name: keccak_init
*
* Description: Initializes the Keccak state.
*
* Arguments: - uint64_t *s: pointer to Keccak state
**************************************************/
static void keccak_init(uint64_t s[25])
{
unsigned int i;
for(i=0;i<25;i++)
s[i] = 0;
}
/*************************************************
* Name: keccak_absorb
*
* Description: Absorb step of Keccak; incremental.
*
* Arguments: - uint64_t *s: pointer to Keccak state
* - unsigned int pos: position in current block to be absorbed
* - unsigned int r: rate in bytes (e.g., 168 for SHAKE128)
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
*
* Returns new position pos in current block
**************************************************/
static unsigned int keccak_absorb(uint64_t s[25],
unsigned int pos,
unsigned int r,
const uint8_t *in,
size_t inlen)
{
unsigned int i;
while(pos+inlen >= r) {
for(i=pos;i<r;i++)
s[i/8] ^= (uint64_t)*in++ << 8*(i%8);
inlen -= r-pos;
KeccakF1600_StatePermute(s);
pos = 0;
}
for(i=pos;i<pos+inlen;i++)
s[i/8] ^= (uint64_t)*in++ << 8*(i%8);
return i;
}
/*************************************************
* Name: keccak_finalize
*
* Description: Finalize absorb step.
*
* Arguments: - uint64_t *s: pointer to Keccak state
* - unsigned int pos: position in current block to be absorbed
* - unsigned int r: rate in bytes (e.g., 168 for SHAKE128)
* - uint8_t p: domain separation byte
**************************************************/
static void keccak_finalize(uint64_t s[25], unsigned int pos, unsigned int r, uint8_t p)
{
s[pos/8] ^= (uint64_t)p << 8*(pos%8);
s[r/8-1] ^= 1ULL << 63;
}
/*************************************************
* Name: keccak_squeeze
*
* Description: Squeeze step of Keccak. Squeezes arbitratrily many bytes.
* Modifies the state. Can be called multiple times to keep
* squeezing, i.e., is incremental.
*
* Arguments: - uint8_t *out: pointer to output
* - size_t outlen: number of bytes to be squeezed (written to out)
* - uint64_t *s: pointer to input/output Keccak state
* - unsigned int pos: number of bytes in current block already squeezed
* - unsigned int r: rate in bytes (e.g., 168 for SHAKE128)
*
* Returns new position pos in current block
**************************************************/
static unsigned int keccak_squeeze(uint8_t *out,
size_t outlen,
uint64_t s[25],
unsigned int pos,
unsigned int r)
{
unsigned int i;
while(outlen) {
if(pos == r) {
KeccakF1600_StatePermute(s);
pos = 0;
}
for(i=pos;i < r && i < pos+outlen; i++)
*out++ = s[i/8] >> 8*(i%8);
outlen -= i-pos;
pos = i;
}
return pos;
}
/*************************************************
* Name: keccak_absorb_once
*
* Description: Absorb step of Keccak;
* non-incremental, starts by zeroeing the state.
*
* Arguments: - uint64_t *s: pointer to (uninitialized) output Keccak state
* - unsigned int r: rate in bytes (e.g., 168 for SHAKE128)
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
* - uint8_t p: domain-separation byte for different Keccak-derived functions
**************************************************/
static void keccak_absorb_once(uint64_t s[25],
unsigned int r,
const uint8_t *in,
size_t inlen,
uint8_t p)
{
unsigned int i;
for(i=0;i<25;i++)
s[i] = 0;
while(inlen >= r) {
for(i=0;i<r/8;i++)
s[i] ^= load64(in+8*i);
in += r;
inlen -= r;
KeccakF1600_StatePermute(s);
}
for(i=0;i<inlen;i++)
s[i/8] ^= (uint64_t)in[i] << 8*(i%8);
s[i/8] ^= (uint64_t)p << 8*(i%8);
s[(r-1)/8] ^= 1ULL << 63;
}
/*************************************************
* Name: keccak_squeezeblocks
*
* Description: Squeeze step of Keccak. Squeezes full blocks of r bytes each.
* Modifies the state. Can be called multiple times to keep
* squeezing, i.e., is incremental. Assumes zero bytes of current
* block have already been squeezed.
*
* Arguments: - uint8_t *out: pointer to output blocks
* - size_t nblocks: number of blocks to be squeezed (written to out)
* - uint64_t *s: pointer to input/output Keccak state
* - unsigned int r: rate in bytes (e.g., 168 for SHAKE128)
**************************************************/
static void keccak_squeezeblocks(uint8_t *out,
size_t nblocks,
uint64_t s[25],
unsigned int r)
{
unsigned int i;
while(nblocks) {
KeccakF1600_StatePermute(s);
for(i=0;i<r/8;i++)
store64(out+8*i, s[i]);
out += r;
nblocks -= 1;
}
}
/*************************************************
* Name: shake128_init
*
* Description: Initilizes Keccak state for use as SHAKE128 XOF
*
* Arguments: - keccak_state *state: pointer to (uninitialized) Keccak state
**************************************************/
void shake128_init(keccak_state *state)
{
keccak_init(state->s);
state->pos = 0;
}
/*************************************************
* Name: shake128_absorb
*
* Description: Absorb step of the SHAKE128 XOF; incremental.
*
* Arguments: - keccak_state *state: pointer to (initialized) output Keccak state
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
**************************************************/
void shake128_absorb(keccak_state *state, const uint8_t *in, size_t inlen)
{
state->pos = keccak_absorb(state->s, state->pos, SHAKE128_RATE, in, inlen);
}
/*************************************************
* Name: shake128_finalize
*
* Description: Finalize absorb step of the SHAKE128 XOF.
*
* Arguments: - keccak_state *state: pointer to Keccak state
**************************************************/
void shake128_finalize(keccak_state *state)
{
keccak_finalize(state->s, state->pos, SHAKE128_RATE, 0x1F);
state->pos = SHAKE128_RATE;
}
/*************************************************
* Name: shake128_squeeze
*
* Description: Squeeze step of SHAKE128 XOF. Squeezes arbitraily many
* bytes. Can be called multiple times to keep squeezing.
*
* Arguments: - uint8_t *out: pointer to output blocks
* - size_t outlen : number of bytes to be squeezed (written to output)
* - keccak_state *s: pointer to input/output Keccak state
**************************************************/
void shake128_squeeze(uint8_t *out, size_t outlen, keccak_state *state)
{
state->pos = keccak_squeeze(out, outlen, state->s, state->pos, SHAKE128_RATE);
}
/*************************************************
* Name: shake128_absorb_once
*
* Description: Initialize, absorb into and finalize SHAKE128 XOF; non-incremental.
*
* Arguments: - keccak_state *state: pointer to (uninitialized) output Keccak state
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
**************************************************/
void shake128_absorb_once(keccak_state *state, const uint8_t *in, size_t inlen)
{
keccak_absorb_once(state->s, SHAKE128_RATE, in, inlen, 0x1F);
state->pos = SHAKE128_RATE;
}
/*************************************************
* Name: shake128_squeezeblocks
*
* Description: Squeeze step of SHAKE128 XOF. Squeezes full blocks of
* SHAKE128_RATE bytes each. Can be called multiple times
* to keep squeezing. Assumes new block has not yet been
* started (state->pos = SHAKE128_RATE).
*
* Arguments: - uint8_t *out: pointer to output blocks
* - size_t nblocks: number of blocks to be squeezed (written to output)
* - keccak_state *s: pointer to input/output Keccak state
**************************************************/
void shake128_squeezeblocks(uint8_t *out, size_t nblocks, keccak_state *state)
{
keccak_squeezeblocks(out, nblocks, state->s, SHAKE128_RATE);
}
/*************************************************
* Name: shake256_init
*
* Description: Initilizes Keccak state for use as SHAKE256 XOF
*
* Arguments: - keccak_state *state: pointer to (uninitialized) Keccak state
**************************************************/
void shake256_init(keccak_state *state)
{
keccak_init(state->s);
state->pos = 0;
}
/*************************************************
* Name: shake256_absorb
*
* Description: Absorb step of the SHAKE256 XOF; incremental.
*
* Arguments: - keccak_state *state: pointer to (initialized) output Keccak state
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
**************************************************/
void shake256_absorb(keccak_state *state, const uint8_t *in, size_t inlen)
{
state->pos = keccak_absorb(state->s, state->pos, SHAKE256_RATE, in, inlen);
}
/*************************************************
* Name: shake256_finalize
*
* Description: Finalize absorb step of the SHAKE256 XOF.
*
* Arguments: - keccak_state *state: pointer to Keccak state
**************************************************/
void shake256_finalize(keccak_state *state)
{
keccak_finalize(state->s, state->pos, SHAKE256_RATE, 0x1F);
state->pos = SHAKE256_RATE;
}
/*************************************************
* Name: shake256_squeeze
*
* Description: Squeeze step of SHAKE256 XOF. Squeezes arbitraily many
* bytes. Can be called multiple times to keep squeezing.
*
* Arguments: - uint8_t *out: pointer to output blocks
* - size_t outlen : number of bytes to be squeezed (written to output)
* - keccak_state *s: pointer to input/output Keccak state
**************************************************/
void shake256_squeeze(uint8_t *out, size_t outlen, keccak_state *state)
{
state->pos = keccak_squeeze(out, outlen, state->s, state->pos, SHAKE256_RATE);
}
/*************************************************
* Name: shake256_absorb_once
*
* Description: Initialize, absorb into and finalize SHAKE256 XOF; non-incremental.
*
* Arguments: - keccak_state *state: pointer to (uninitialized) output Keccak state
* - const uint8_t *in: pointer to input to be absorbed into s
* - size_t inlen: length of input in bytes
**************************************************/
void shake256_absorb_once(keccak_state *state, const uint8_t *in, size_t inlen)
{
keccak_absorb_once(state->s, SHAKE256_RATE, in, inlen, 0x1F);
state->pos = SHAKE256_RATE;
}
/*************************************************
* Name: shake256_squeezeblocks
*
* Description: Squeeze step of SHAKE256 XOF. Squeezes full blocks of
* SHAKE256_RATE bytes each. Can be called multiple times
* to keep squeezing. Assumes next block has not yet been
* started (state->pos = SHAKE256_RATE).
*
* Arguments: - uint8_t *out: pointer to output blocks
* - size_t nblocks: number of blocks to be squeezed (written to output)
* - keccak_state *s: pointer to input/output Keccak state
**************************************************/
void shake256_squeezeblocks(uint8_t *out, size_t nblocks, keccak_state *state)
{
keccak_squeezeblocks(out, nblocks, state->s, SHAKE256_RATE);
}
/*************************************************
* Name: shake128
*
* Description: SHAKE128 XOF with non-incremental API
*
* Arguments: - uint8_t *out: pointer to output
* - size_t outlen: requested output length in bytes
* - const uint8_t *in: pointer to input
* - size_t inlen: length of input in bytes
**************************************************/
void shake128(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen)
{
size_t nblocks;
keccak_state state;
shake128_absorb_once(&state, in, inlen);
nblocks = outlen/SHAKE128_RATE;
shake128_squeezeblocks(out, nblocks, &state);
outlen -= nblocks*SHAKE128_RATE;
out += nblocks*SHAKE128_RATE;
shake128_squeeze(out, outlen, &state);
}
/*************************************************
* Name: shake256
*
* Description: SHAKE256 XOF with non-incremental API
*
* Arguments: - uint8_t *out: pointer to output
* - size_t outlen: requested output length in bytes
* - const uint8_t *in: pointer to input
* - size_t inlen: length of input in bytes
**************************************************/
void shake256(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen)
{
size_t nblocks;
keccak_state state;
shake256_absorb_once(&state, in, inlen);
nblocks = outlen/SHAKE256_RATE;
shake256_squeezeblocks(out, nblocks, &state);
outlen -= nblocks*SHAKE256_RATE;
out += nblocks*SHAKE256_RATE;
shake256_squeeze(out, outlen, &state);
}
/*************************************************
* Name: sha3_256
*
* Description: SHA3-256 with non-incremental API
*
* Arguments: - uint8_t *h: pointer to output (32 bytes)
* - const uint8_t *in: pointer to input
* - size_t inlen: length of input in bytes
**************************************************/
void sha3_256(uint8_t h[32], const uint8_t *in, size_t inlen)
{
unsigned int i;
uint64_t s[25];
keccak_absorb_once(s, SHA3_256_RATE, in, inlen, 0x06);
KeccakF1600_StatePermute(s);
for(i=0;i<4;i++)
store64(h+8*i,s[i]);
}
/*************************************************
* Name: sha3_512
*
* Description: SHA3-512 with non-incremental API
*
* Arguments: - uint8_t *h: pointer to output (64 bytes)
* - const uint8_t *in: pointer to input
* - size_t inlen: length of input in bytes
**************************************************/
void sha3_512(uint8_t h[64], const uint8_t *in, size_t inlen)
{
unsigned int i;
uint64_t s[25];
keccak_absorb_once(s, SHA3_512_RATE, in, inlen, 0x06);
KeccakF1600_StatePermute(s);
for(i=0;i<8;i++)
store64(h+8*i,s[i]);
}