119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
// keccak.c
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// 19-Nov-11 Markku-Juhani O. Saarinen <mjos@iki.fi>
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// A baseline Keccak (3rd round) implementation.
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// Memory-hard extension of keccak for PoW
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// Copyright (c) 2014 The Boolberry developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "wild_keccak.h"
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namespace crypto
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{
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const uint64_t keccakf_rndc[24] =
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{
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0x0000000000000001, 0x0000000000008082, 0x800000000000808a,
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0x8000000080008000, 0x000000000000808b, 0x0000000080000001,
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0x8000000080008081, 0x8000000000008009, 0x000000000000008a,
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0x0000000000000088, 0x0000000080008009, 0x000000008000000a,
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0x000000008000808b, 0x800000000000008b, 0x8000000000008089,
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0x8000000000008003, 0x8000000000008002, 0x8000000000000080,
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0x000000000000800a, 0x800000008000000a, 0x8000000080008081,
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0x8000000000008080, 0x0000000080000001, 0x8000000080008008
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};
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const int keccakf_rotc[24] =
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{
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1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14,
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27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44
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};
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const int keccakf_piln[24] =
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{
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10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4,
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15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1
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};
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// update the state with given number of rounds
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void regular_f::keccakf(uint64_t st[25], int rounds)
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{
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int i, j, round;
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uint64_t t, bc[5];
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for (round = 0; round < rounds; round++) {
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// Theta
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for (i = 0; i < 5; i++)
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bc[i] = st[i] ^ st[i + 5] ^ st[i + 10] ^ st[i + 15] ^ st[i + 20];
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for (i = 0; i < 5; i++) {
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t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1);
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for (j = 0; j < 25; j += 5)
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st[j + i] ^= t;
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}
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// Rho Pi
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t = st[1];
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for (i = 0; i < 24; i++) {
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j = keccakf_piln[i];
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bc[0] = st[j];
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st[j] = ROTL64(t, keccakf_rotc[i]);
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t = bc[0];
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}
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// Chi
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for (j = 0; j < 25; j += 5) {
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for (i = 0; i < 5; i++)
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bc[i] = st[j + i];
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for (i = 0; i < 5; i++)
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st[j + i] ^= (~bc[(i + 1) % 5]) & bc[(i + 2) % 5];
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}
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// Iota
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st[0] ^= keccakf_rndc[round];
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}
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}
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void mul_f::keccakf(uint64_t st[25], int rounds)
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{
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int i, j, round;
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uint64_t t, bc[5];
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for (round = 0; round < rounds; round++) {
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// Theta
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for (i = 0; i < 5; i++)
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{
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bc[i] = st[i] ^ st[i + 5] ^ st[i + 10] * st[i + 15] * st[i + 20];//surprise
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}
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for (i = 0; i < 5; i++) {
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t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1);
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for (j = 0; j < 25; j += 5)
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st[j + i] ^= t;
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}
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// Rho Pi
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t = st[1];
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for (i = 0; i < 24; i++) {
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j = keccakf_piln[i];
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bc[0] = st[j];
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st[j] = ROTL64(t, keccakf_rotc[i]);
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t = bc[0];
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}
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// Chi
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for (j = 0; j < 25; j += 5) {
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for (i = 0; i < 5; i++)
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bc[i] = st[j + i];
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for (i = 0; i < 5; i++)
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st[j + i] ^= (~bc[(i + 1) % 5]) & bc[(i + 2) % 5];
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}
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// Iota
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st[0] ^= keccakf_rndc[round];
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}
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}
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} |