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// sha3.cpp - modified by Wei Dai from Ronny Van Keer's public domain Keccak-simple.c
// all modifications here are placed in the public domain by Wei Dai
/*
The Keccak sponge function, designed by Guido Bertoni, Joan Daemen,
Michael Peeters and Gilles Van Assche. For more information, feedback or
questions, please refer to our website: http://keccak.noekeon.org/
Implementation by Ronny Van Keer,
hereby denoted as "the implementer".
To the extent possible under law, the implementer has waived all copyright
and related or neighboring rights to the source code in this file.
http://creativecommons.org/publicdomain/zero/1.0/
*/
#include "pch.h"
#include "sha3.h"
NAMESPACE_BEGIN(CryptoPP)
static const word64 KeccakF_RoundConstants[24] =
{
W64LIT(0x0000000000000001), W64LIT(0x0000000000008082), W64LIT(0x800000000000808a),
W64LIT(0x8000000080008000), W64LIT(0x000000000000808b), W64LIT(0x0000000080000001),
W64LIT(0x8000000080008081), W64LIT(0x8000000000008009), W64LIT(0x000000000000008a),
W64LIT(0x0000000000000088), W64LIT(0x0000000080008009), W64LIT(0x000000008000000a),
W64LIT(0x000000008000808b), W64LIT(0x800000000000008b), W64LIT(0x8000000000008089),
W64LIT(0x8000000000008003), W64LIT(0x8000000000008002), W64LIT(0x8000000000000080),
W64LIT(0x000000000000800a), W64LIT(0x800000008000000a), W64LIT(0x8000000080008081),
W64LIT(0x8000000000008080), W64LIT(0x0000000080000001), W64LIT(0x8000000080008008)
};
static void KeccakF1600(word64 *state)
{
{
word64 Aba, Abe, Abi, Abo, Abu;
word64 Aga, Age, Agi, Ago, Agu;
word64 Aka, Ake, Aki, Ako, Aku;
word64 Ama, Ame, Ami, Amo, Amu;
word64 Asa, Ase, Asi, Aso, Asu;
word64 BCa, BCe, BCi, BCo, BCu;
word64 Da, De, Di, Do, Du;
word64 Eba, Ebe, Ebi, Ebo, Ebu;
word64 Ega, Ege, Egi, Ego, Egu;
word64 Eka, Eke, Eki, Eko, Eku;
word64 Ema, Eme, Emi, Emo, Emu;
word64 Esa, Ese, Esi, Eso, Esu;
//copyFromState(A, state)
typedef BlockGetAndPut<word64, LittleEndian, true, true> Block;
Block::Get(state)(Aba)(Abe)(Abi)(Abo)(Abu)(Aga)(Age)(Agi)(Ago)(Agu)(Aka)(Ake)(Aki)(Ako)(Aku)(Ama)(Ame)(Ami)(Amo)(Amu)(Asa)(Ase)(Asi)(Aso)(Asu);
for( unsigned int round = 0; round < 24; 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^rotlFixed(BCe, 1);
De = BCa^rotlFixed(BCi, 1);
Di = BCe^rotlFixed(BCo, 1);
Do = BCi^rotlFixed(BCu, 1);
Du = BCo^rotlFixed(BCa, 1);
Aba ^= Da;
BCa = Aba;
Age ^= De;
BCe = rotlFixed(Age, 44);
Aki ^= Di;
BCi = rotlFixed(Aki, 43);
Amo ^= Do;
BCo = rotlFixed(Amo, 21);
Asu ^= Du;
BCu = rotlFixed(Asu, 14);
Eba = BCa ^((~BCe)& BCi );
Eba ^= (word64)KeccakF_RoundConstants[round];
Ebe = BCe ^((~BCi)& BCo );
Ebi = BCi ^((~BCo)& BCu );
Ebo = BCo ^((~BCu)& BCa );
Ebu = BCu ^((~BCa)& BCe );
Abo ^= Do;
BCa = rotlFixed(Abo, 28);
Agu ^= Du;
BCe = rotlFixed(Agu, 20);
Aka ^= Da;
BCi = rotlFixed(Aka, 3);
Ame ^= De;
BCo = rotlFixed(Ame, 45);
Asi ^= Di;
BCu = rotlFixed(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 = rotlFixed(Abe, 1);
Agi ^= Di;
BCe = rotlFixed(Agi, 6);
Ako ^= Do;
BCi = rotlFixed(Ako, 25);
Amu ^= Du;
BCo = rotlFixed(Amu, 8);
Asa ^= Da;
BCu = rotlFixed(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 = rotlFixed(Abu, 27);
Aga ^= Da;
BCe = rotlFixed(Aga, 36);
Ake ^= De;
BCi = rotlFixed(Ake, 10);
Ami ^= Di;
BCo = rotlFixed(Ami, 15);
Aso ^= Do;
BCu = rotlFixed(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 = rotlFixed(Abi, 62);
Ago ^= Do;
BCe = rotlFixed(Ago, 55);
Aku ^= Du;
BCi = rotlFixed(Aku, 39);
Ama ^= Da;
BCo = rotlFixed(Ama, 41);
Ase ^= De;
BCu = rotlFixed(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^rotlFixed(BCe, 1);
De = BCa^rotlFixed(BCi, 1);
Di = BCe^rotlFixed(BCo, 1);
Do = BCi^rotlFixed(BCu, 1);
Du = BCo^rotlFixed(BCa, 1);
Eba ^= Da;
BCa = Eba;
Ege ^= De;
BCe = rotlFixed(Ege, 44);
Eki ^= Di;
BCi = rotlFixed(Eki, 43);
Emo ^= Do;
BCo = rotlFixed(Emo, 21);
Esu ^= Du;
BCu = rotlFixed(Esu, 14);
Aba = BCa ^((~BCe)& BCi );
Aba ^= (word64)KeccakF_RoundConstants[round+1];
Abe = BCe ^((~BCi)& BCo );
Abi = BCi ^((~BCo)& BCu );
Abo = BCo ^((~BCu)& BCa );
Abu = BCu ^((~BCa)& BCe );
Ebo ^= Do;
BCa = rotlFixed(Ebo, 28);
Egu ^= Du;
BCe = rotlFixed(Egu, 20);
Eka ^= Da;
BCi = rotlFixed(Eka, 3);
Eme ^= De;
BCo = rotlFixed(Eme, 45);
Esi ^= Di;
BCu = rotlFixed(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 = rotlFixed(Ebe, 1);
Egi ^= Di;
BCe = rotlFixed(Egi, 6);
Eko ^= Do;
BCi = rotlFixed(Eko, 25);
Emu ^= Du;
BCo = rotlFixed(Emu, 8);
Esa ^= Da;
BCu = rotlFixed(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 = rotlFixed(Ebu, 27);
Ega ^= Da;
BCe = rotlFixed(Ega, 36);
Eke ^= De;
BCi = rotlFixed(Eke, 10);
Emi ^= Di;
BCo = rotlFixed(Emi, 15);
Eso ^= Do;
BCu = rotlFixed(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 = rotlFixed(Ebi, 62);
Ego ^= Do;
BCe = rotlFixed(Ego, 55);
Eku ^= Du;
BCi = rotlFixed(Eku, 39);
Ema ^= Da;
BCo = rotlFixed(Ema, 41);
Ese ^= De;
BCu = rotlFixed(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)
Block::Put(NULL, state)(Aba)(Abe)(Abi)(Abo)(Abu)(Aga)(Age)(Agi)(Ago)(Agu)(Aka)(Ake)(Aki)(Ako)(Aku)(Ama)(Ame)(Ami)(Amo)(Amu)(Asa)(Ase)(Asi)(Aso)(Asu);
}
}
void SHA3::Update(const byte *input, size_t length)
{
size_t spaceLeft;
while (length >= (spaceLeft = r() - m_counter))
{
xorbuf(m_state.BytePtr() + m_counter, input, spaceLeft);
KeccakF1600(m_state);
input += spaceLeft;
length -= spaceLeft;
m_counter = 0;
}
xorbuf(m_state.BytePtr() + m_counter, input, length);
m_counter += (unsigned int)length;
}
void SHA3::Restart()
{
memset(m_state, 0, m_state.SizeInBytes());
m_counter = 0;
}
void SHA3::TruncatedFinal(byte *hash, size_t size)
{
ThrowIfInvalidTruncatedSize(size);
m_state.BytePtr()[m_counter] ^= 1;
m_state.BytePtr()[r()-1] ^= 0x80;
KeccakF1600(m_state);
memcpy(hash, m_state, size);
Restart();
}
NAMESPACE_END
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