From aed8ab1b62ae4712d97d53ce31a915cd3446dcad Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sat, 10 Aug 2013 06:46:53 +0200 Subject: split python3 version into two files MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- python3/sha3.py | 630 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 630 insertions(+) create mode 100644 python3/sha3.py (limited to 'python3/sha3.py') diff --git a/python3/sha3.py b/python3/sha3.py new file mode 100644 index 0000000..340cf5f --- /dev/null +++ b/python3/sha3.py @@ -0,0 +1,630 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +''' +sha3sum – SHA-3 (Keccak) checksum calculator + +Copyright © 2013 Mattias Andrée (maandree@member.fsf.org) + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +''' + +class SHA3: + ''' + SHA-3/Keccak hash algorithm implementation + + @author Mattias Andrée (maandree@member.fsf.org) + ''' + + + RC = [0x0000000000000001, 0x0000000000008082, 0x800000000000808A, 0x8000000080008000, + 0x000000000000808B, 0x0000000080000001, 0x8000000080008081, 0x8000000000008009, + 0x000000000000008A, 0x0000000000000088, 0x0000000080008009, 0x000000008000000A, + 0x000000008000808B, 0x800000000000008B, 0x8000000000008089, 0x8000000000008003, + 0x8000000000008002, 0x8000000000000080, 0x000000000000800A, 0x800000008000000A, + 0x8000000080008081, 0x8000000000008080, 0x0000000080000001, 0x8000000080008008] + ''' + :list Round contants + ''' + + B = [0] * 25 + ''' + :list Keccak-f round temporary + ''' + + C = [0] * 5 + ''' + :list Keccak-f round temporary + ''' + + + (r, c, n, b, w, wmod, l, nr) = (0, 0, 0, 0, 0, 0, 0, 0) + ''' + r:int The bitrate + c:int The capacity + n:int The output size + b:int The state size + w:int The word size + wmod:int The word mask + l:int ℓ, the binary logarithm of the word size + nr:int 12 + 2ℓ, the number of rounds + ''' + + S = None + ''' + :list The current state + ''' + + M = None + ''' + :bytes Left over water to fill the sponge with at next update + ''' + + + + @staticmethod + def rotate(x, n): + ''' + Rotate a word + + @param x:int The value to rotate + @param n:int Rotation steps + @return :int The value rotated + ''' + m = n % SHA3.w + return ((x >> (SHA3.w - m)) + (x << m)) & SHA3.wmod + + + @staticmethod + def rotate64(x, n): + ''' + Rotate a 64-bit word + + @param x:int The value to rotate + @param n:int Rotation steps + @return :int The value rotated + ''' + return ((x >> (64 - n)) + (x << n)) & 0xFFFFFFFFFFFFFFFF + + + @staticmethod + def lb(x): + ''' + Binary logarithm + + @param x:int The value of which to calculate the binary logarithm + @return :int The binary logarithm + ''' + rc = 0 + if (x & 0xFF00) != 0: rc += 8 ; x >>= 8 + if (x & 0x00F0) != 0: rc += 4 ; x >>= 4 + if (x & 0x000C) != 0: rc += 2 ; x >>= 2 + if (x & 0x0002) != 0: rc += 1 + return rc + + + @staticmethod + def keccakFRound(A, rc): + ''' + Perform one round of computation + + @param A:list The current state + @param rc:int Round constant + ''' + if SHA3.w == 64: + # θ step (step 1 and 2 of 3) + SHA3.C[0] = (A[0] ^ A[1]) ^ (A[2] ^ A[3]) ^ A[4] + SHA3.C[2] = (A[10] ^ A[11]) ^ (A[12] ^ A[13]) ^ A[14] + db = SHA3.C[0] ^ SHA3.rotate64(SHA3.C[2], 1) + SHA3.C[4] = (A[20] ^ A[21]) ^ (A[22] ^ A[23]) ^ A[24] + dd = SHA3.C[2] ^ SHA3.rotate64(SHA3.C[4], 1) + SHA3.C[1] = (A[5] ^ A[6]) ^ (A[7] ^ A[8]) ^ A[9] + da = SHA3.C[4] ^ SHA3.rotate64(SHA3.C[1], 1) + SHA3.C[3] = (A[15] ^ A[16]) ^ (A[17] ^ A[18]) ^ A[19] + dc = SHA3.C[1] ^ SHA3.rotate64(SHA3.C[3], 1) + de = SHA3.C[3] ^ SHA3.rotate64(SHA3.C[0], 1) + + # ρ and π steps, with last part of θ + SHA3.B[0] = SHA3.rotate64(A[0] ^ da, 0) + SHA3.B[1] = SHA3.rotate64(A[15] ^ dd, 28) + SHA3.B[2] = SHA3.rotate64(A[5] ^ db, 1) + SHA3.B[3] = SHA3.rotate64(A[20] ^ de, 27) + SHA3.B[4] = SHA3.rotate64(A[10] ^ dc, 62) + + SHA3.B[5] = SHA3.rotate64(A[6] ^ db, 44) + SHA3.B[6] = SHA3.rotate64(A[21] ^ de, 20) + SHA3.B[7] = SHA3.rotate64(A[11] ^ dc, 6) + SHA3.B[8] = SHA3.rotate64(A[1] ^ da, 36) + SHA3.B[9] = SHA3.rotate64(A[16] ^ dd, 55) + + SHA3.B[10] = SHA3.rotate64(A[12] ^ dc, 43) + SHA3.B[11] = SHA3.rotate64(A[2] ^ da, 3) + SHA3.B[12] = SHA3.rotate64(A[17] ^ dd, 25) + SHA3.B[13] = SHA3.rotate64(A[7] ^ db, 10) + SHA3.B[14] = SHA3.rotate64(A[22] ^ de, 39) + + SHA3.B[15] = SHA3.rotate64(A[18] ^ dd, 21) + SHA3.B[16] = SHA3.rotate64(A[8] ^ db, 45) + SHA3.B[17] = SHA3.rotate64(A[23] ^ de, 8) + SHA3.B[18] = SHA3.rotate64(A[13] ^ dc, 15) + SHA3.B[19] = SHA3.rotate64(A[3] ^ da, 41) + + SHA3.B[20] = SHA3.rotate64(A[24] ^ de, 14) + SHA3.B[21] = SHA3.rotate64(A[14] ^ dc, 61) + SHA3.B[22] = SHA3.rotate64(A[4] ^ da, 18) + SHA3.B[23] = SHA3.rotate64(A[19] ^ dd, 56) + SHA3.B[24] = SHA3.rotate64(A[9] ^ db, 2) + else: + # θ step (step 1 and 2 of 3) + SHA3.C[0] = (A[0] ^ A[1]) ^ (A[2] ^ A[3]) ^ A[4] + SHA3.C[2] = (A[10] ^ A[11]) ^ (A[12] ^ A[13]) ^ A[14] + db = SHA3.C[0] ^ SHA3.rotate(SHA3.C[2], 1) + SHA3.C[4] = (A[20] ^ A[21]) ^ (A[22] ^ A[23]) ^ A[24] + dd = SHA3.C[2] ^ SHA3.rotate(SHA3.C[4], 1) + SHA3.C[1] = (A[5] ^ A[6]) ^ (A[7] ^ A[8]) ^ A[9] + da = SHA3.C[4] ^ SHA3.rotate(SHA3.C[1], 1) + SHA3.C[3] = (A[15] ^ A[16]) ^ (A[17] ^ A[18]) ^ A[19] + dc = SHA3.C[1] ^ SHA3.rotate(SHA3.C[3], 1) + de = SHA3.C[3] ^ SHA3.rotate(SHA3.C[0], 1) + + # ρ and π steps, with last part of θ + SHA3.B[0] = SHA3.rotate(A[0] ^ da, 0) + SHA3.B[1] = SHA3.rotate(A[15] ^ dd, 28) + SHA3.B[2] = SHA3.rotate(A[5] ^ db, 1) + SHA3.B[3] = SHA3.rotate(A[20] ^ de, 27) + SHA3.B[4] = SHA3.rotate(A[10] ^ dc, 62) + + SHA3.B[5] = SHA3.rotate(A[6] ^ db, 44) + SHA3.B[6] = SHA3.rotate(A[21] ^ de, 20) + SHA3.B[7] = SHA3.rotate(A[11] ^ dc, 6) + SHA3.B[8] = SHA3.rotate(A[1] ^ da, 36) + SHA3.B[9] = SHA3.rotate(A[16] ^ dd, 55) + + SHA3.B[10] = SHA3.rotate(A[12] ^ dc, 43) + SHA3.B[11] = SHA3.rotate(A[2] ^ da, 3) + SHA3.B[12] = SHA3.rotate(A[17] ^ dd, 25) + SHA3.B[13] = SHA3.rotate(A[7] ^ db, 10) + SHA3.B[14] = SHA3.rotate(A[22] ^ de, 39) + + SHA3.B[15] = SHA3.rotate(A[18] ^ dd, 21) + SHA3.B[16] = SHA3.rotate(A[8] ^ db, 45) + SHA3.B[17] = SHA3.rotate(A[23] ^ de, 8) + SHA3.B[18] = SHA3.rotate(A[13] ^ dc, 15) + SHA3.B[19] = SHA3.rotate(A[3] ^ da, 41) + + SHA3.B[20] = SHA3.rotate(A[24] ^ de, 14) + SHA3.B[21] = SHA3.rotate(A[14] ^ dc, 61) + SHA3.B[22] = SHA3.rotate(A[4] ^ da, 18) + SHA3.B[23] = SHA3.rotate(A[19] ^ dd, 56) + SHA3.B[24] = SHA3.rotate(A[9] ^ db, 2) + + # ξ step + A[0] = SHA3.B[0] ^ ((~(SHA3.B[5])) & SHA3.B[10]) + A[1] = SHA3.B[1] ^ ((~(SHA3.B[6])) & SHA3.B[11]) + A[2] = SHA3.B[2] ^ ((~(SHA3.B[7])) & SHA3.B[12]) + A[3] = SHA3.B[3] ^ ((~(SHA3.B[8])) & SHA3.B[13]) + A[4] = SHA3.B[4] ^ ((~(SHA3.B[9])) & SHA3.B[14]) + + A[5] = SHA3.B[5] ^ ((~(SHA3.B[10])) & SHA3.B[15]) + A[6] = SHA3.B[6] ^ ((~(SHA3.B[11])) & SHA3.B[16]) + A[7] = SHA3.B[7] ^ ((~(SHA3.B[12])) & SHA3.B[17]) + A[8] = SHA3.B[8] ^ ((~(SHA3.B[13])) & SHA3.B[18]) + A[9] = SHA3.B[9] ^ ((~(SHA3.B[14])) & SHA3.B[19]) + + A[10] = SHA3.B[10] ^ ((~(SHA3.B[15])) & SHA3.B[20]) + A[11] = SHA3.B[11] ^ ((~(SHA3.B[16])) & SHA3.B[21]) + A[12] = SHA3.B[12] ^ ((~(SHA3.B[17])) & SHA3.B[22]) + A[13] = SHA3.B[13] ^ ((~(SHA3.B[18])) & SHA3.B[23]) + A[14] = SHA3.B[14] ^ ((~(SHA3.B[19])) & SHA3.B[24]) + + A[15] = SHA3.B[15] ^ ((~(SHA3.B[20])) & SHA3.B[0]) + A[16] = SHA3.B[16] ^ ((~(SHA3.B[21])) & SHA3.B[1]) + A[17] = SHA3.B[17] ^ ((~(SHA3.B[22])) & SHA3.B[2]) + A[18] = SHA3.B[18] ^ ((~(SHA3.B[23])) & SHA3.B[3]) + A[19] = SHA3.B[19] ^ ((~(SHA3.B[24])) & SHA3.B[4]) + + A[20] = SHA3.B[20] ^ ((~(SHA3.B[0])) & SHA3.B[5]) + A[21] = SHA3.B[21] ^ ((~(SHA3.B[1])) & SHA3.B[6]) + A[22] = SHA3.B[22] ^ ((~(SHA3.B[2])) & SHA3.B[7]) + A[23] = SHA3.B[23] ^ ((~(SHA3.B[3])) & SHA3.B[8]) + A[24] = SHA3.B[24] ^ ((~(SHA3.B[4])) & SHA3.B[9]) + + # ι step + A[0] ^= rc + + + @staticmethod + def keccakF(A): + ''' + Perform Keccak-f function + + @param A:list The current state + ''' + if (SHA3.nr == 24): + SHA3.keccakFRound(A, 0x0000000000000001) + SHA3.keccakFRound(A, 0x0000000000008082) + SHA3.keccakFRound(A, 0x800000000000808A) + SHA3.keccakFRound(A, 0x8000000080008000) + SHA3.keccakFRound(A, 0x000000000000808B) + SHA3.keccakFRound(A, 0x0000000080000001) + SHA3.keccakFRound(A, 0x8000000080008081) + SHA3.keccakFRound(A, 0x8000000000008009) + SHA3.keccakFRound(A, 0x000000000000008A) + SHA3.keccakFRound(A, 0x0000000000000088) + SHA3.keccakFRound(A, 0x0000000080008009) + SHA3.keccakFRound(A, 0x000000008000000A) + SHA3.keccakFRound(A, 0x000000008000808B) + SHA3.keccakFRound(A, 0x800000000000008B) + SHA3.keccakFRound(A, 0x8000000000008089) + SHA3.keccakFRound(A, 0x8000000000008003) + SHA3.keccakFRound(A, 0x8000000000008002) + SHA3.keccakFRound(A, 0x8000000000000080) + SHA3.keccakFRound(A, 0x000000000000800A) + SHA3.keccakFRound(A, 0x800000008000000A) + SHA3.keccakFRound(A, 0x8000000080008081) + SHA3.keccakFRound(A, 0x8000000000008080) + SHA3.keccakFRound(A, 0x0000000080000001) + SHA3.keccakFRound(A, 0x8000000080008008) + else: + for i in range(SHA3.nr): + SHA3.keccakFRound(A, SHA3.RC[i] & SHA3.wmod) + + + @staticmethod + def toLane(message, rr, ww, off): + ''' + Convert a chunk of char:s to a word + + @param message:bytes The message + @param rr:int Bitrate in bytes + @param ww:int Word size in bytes + @param off:int The offset in the message + @return :int Lane + ''' + rc = 0 + i = off + ww - 1 + n = min(len(message), rr) + while i >= off: + rc = (rc << 8) | (message[i] if (i < n) else 0) + i -= 1 + return rc + + + @staticmethod + def toLane64(message, rr, off): + ''' + Convert a chunk of char:s to a 64-bit word + + @param message:bytes The message + @param rr:int Bitrate in bytes + @param off:int The offset in the message + @return :int Lane + ''' + n = min(len(message), rr) + + return ((message[off + 7] << 56) if (off + 7 < n) else 0) | ((message[off + 6] << 48) if (off + 6 < n) else 0) | ((message[off + 5] << 40) if (off + 5 < n) else 0) | ((message[off + 4] << 32) if (off + 4 < n) else 0) | ((message[off + 3] << 24) if (off + 3 < n) else 0) | ((message[off + 2] << 16) if (off + 2 < n) else 0) | ((message[off + 1] << 8) if (off + 1 < n) else 0) | ((message[off]) if (off < n) else 0) + + + @staticmethod + def pad10star1(msg, r): + ''' + pad 10*1 + + @param msg:bytes The message to pad + @param r:int The bitrate + @return :str The message padded + ''' + nnn = len(msg) << 3 + + nrf = nnn >> 3 + nbrf = nnn & 7 + ll = nnn % r + + bbbb = 1 if nbrf == 0 else ((msg[nrf] >> (8 - nbrf)) | (1 << nbrf)) + + message = None + if ((r - 8 <= ll) and (ll <= r - 2)): + message = [bbbb ^ 128] + else: + nnn = (nrf + 1) << 3 + nnn = ((nnn - (nnn % r) + (r - 8)) >> 3) + 1 + message = [0] * (nnn - nrf) + message[0] = bbbb + nnn -= nrf + message[nnn - 1] = 0x80 + + return msg[:nrf] + bytes(message) + + + @staticmethod + def initialise(r, c, n): + ''' + Initialise Keccak sponge + + @param r:int The bitrate + @param c:int The capacity + @param n:int The output size + ''' + SHA3.r = r + SHA3.c = c + SHA3.n = n + SHA3.b = r + c + SHA3.w = SHA3.b // 25 + SHA3.l = SHA3.lb(SHA3.w) + SHA3.nr = 12 + (SHA3.l << 1) + SHA3.wmod = (1 << SHA3.w) - 1 + SHA3.S = [0] * 25 + SHA3.M = bytes([]) + + + @staticmethod + def update(msg, msglen = None): + ''' + Absorb the more of the message message to the Keccak sponge + + @param msg:bytes The partial message + @param msglen:int The length of the partial message + ''' + if msglen is not None: + msg = msg[:msglen] + + rr = SHA3.r >> 3 + ww = SHA3.w >> 3 + + SHA3.M += msg + nnn = len(SHA3.M) + nnn -= nnn % ((SHA3.r * SHA3.b) >> 3) + message = SHA3.M[:nnn] + SHA3.M = SHA3.M[nnn:] + + # Absorbing phase + if ww == 8: + for i in range(0, nnn, rr): + SHA3.S[ 0] ^= SHA3.toLane64(message, rr, 0) + SHA3.S[ 5] ^= SHA3.toLane64(message, rr, 8) + SHA3.S[10] ^= SHA3.toLane64(message, rr, 16) + SHA3.S[15] ^= SHA3.toLane64(message, rr, 24) + SHA3.S[20] ^= SHA3.toLane64(message, rr, 32) + SHA3.S[ 1] ^= SHA3.toLane64(message, rr, 40) + SHA3.S[ 6] ^= SHA3.toLane64(message, rr, 48) + SHA3.S[11] ^= SHA3.toLane64(message, rr, 56) + SHA3.S[16] ^= SHA3.toLane64(message, rr, 64) + SHA3.S[21] ^= SHA3.toLane64(message, rr, 72) + SHA3.S[ 2] ^= SHA3.toLane64(message, rr, 80) + SHA3.S[ 7] ^= SHA3.toLane64(message, rr, 88) + SHA3.S[12] ^= SHA3.toLane64(message, rr, 96) + SHA3.S[17] ^= SHA3.toLane64(message, rr, 104) + SHA3.S[22] ^= SHA3.toLane64(message, rr, 112) + SHA3.S[ 3] ^= SHA3.toLane64(message, rr, 120) + SHA3.S[ 8] ^= SHA3.toLane64(message, rr, 128) + SHA3.S[13] ^= SHA3.toLane64(message, rr, 136) + SHA3.S[18] ^= SHA3.toLane64(message, rr, 144) + SHA3.S[23] ^= SHA3.toLane64(message, rr, 152) + SHA3.S[ 4] ^= SHA3.toLane64(message, rr, 160) + SHA3.S[ 9] ^= SHA3.toLane64(message, rr, 168) + SHA3.S[14] ^= SHA3.toLane64(message, rr, 176) + SHA3.S[19] ^= SHA3.toLane64(message, rr, 184) + SHA3.S[24] ^= SHA3.toLane64(message, rr, 192) + SHA3.keccakF(SHA3.S) + message = message[rr:] + else: + for i in range(0, nnn, rr): + SHA3.S[ 0] ^= SHA3.toLane(message, rr, ww, 0) + SHA3.S[ 5] ^= SHA3.toLane(message, rr, ww, ww) + SHA3.S[10] ^= SHA3.toLane(message, rr, ww, 2 * ww) + SHA3.S[15] ^= SHA3.toLane(message, rr, ww, 3 * ww) + SHA3.S[20] ^= SHA3.toLane(message, rr, ww, 4 * ww) + SHA3.S[ 1] ^= SHA3.toLane(message, rr, ww, 5 * ww) + SHA3.S[ 6] ^= SHA3.toLane(message, rr, ww, 6 * ww) + SHA3.S[11] ^= SHA3.toLane(message, rr, ww, 7 * ww) + SHA3.S[16] ^= SHA3.toLane(message, rr, ww, 8 * ww) + SHA3.S[21] ^= SHA3.toLane(message, rr, ww, 9 * ww) + SHA3.S[ 2] ^= SHA3.toLane(message, rr, ww, 10 * ww) + SHA3.S[ 7] ^= SHA3.toLane(message, rr, ww, 11 * ww) + SHA3.S[12] ^= SHA3.toLane(message, rr, ww, 12 * ww) + SHA3.S[17] ^= SHA3.toLane(message, rr, ww, 13 * ww) + SHA3.S[22] ^= SHA3.toLane(message, rr, ww, 14 * ww) + SHA3.S[ 3] ^= SHA3.toLane(message, rr, ww, 15 * ww) + SHA3.S[ 8] ^= SHA3.toLane(message, rr, ww, 16 * ww) + SHA3.S[13] ^= SHA3.toLane(message, rr, ww, 17 * ww) + SHA3.S[18] ^= SHA3.toLane(message, rr, ww, 18 * ww) + SHA3.S[23] ^= SHA3.toLane(message, rr, ww, 19 * ww) + SHA3.S[ 4] ^= SHA3.toLane(message, rr, ww, 20 * ww) + SHA3.S[ 9] ^= SHA3.toLane(message, rr, ww, 21 * ww) + SHA3.S[14] ^= SHA3.toLane(message, rr, ww, 22 * ww) + SHA3.S[19] ^= SHA3.toLane(message, rr, ww, 23 * ww) + SHA3.S[24] ^= SHA3.toLane(message, rr, ww, 24 * ww) + message = message[rr:] + SHA3.keccakF(SHA3.S) + + + @staticmethod + def digest(msg = None, msglen = None, withReturn = None): + ''' + Absorb the last part of the message and squeeze the Keccak sponge + + @param msg:bytes? The rest of the message + @param msglen:int The length of the partial message + @param withReturn:bool Whether to return the hash instead of just do a quick squeeze phrase and return `None` + @return :bytes? The hash sum, or `None` if `withReturn` is `False` + ''' + if (msg is not None) and isinstance(msg, bool): + (msg, withReturn) = (withReturn, msg) + elif (msglen is not None) and isinstance(msglen, bool): + (msglen, withReturn) = (withReturn, msglen) + if msg is None: + msg = bytes([]) + elif msglen is not None: + msg = msg[:msglen] + message = SHA3.pad10star1(SHA3.M + msg, SHA3.r) + SHA3.M = None + nnn = len(message) + + rr = SHA3.r >> 3 + nn = (SHA3.n + 7) >> 3 + ww = SHA3.w >> 3 + + # Absorbing phase + if ww == 8: + for i in range(0, nnn, rr): + SHA3.S[ 0] ^= SHA3.toLane64(message, rr, 0) + SHA3.S[ 5] ^= SHA3.toLane64(message, rr, 8) + SHA3.S[10] ^= SHA3.toLane64(message, rr, 16) + SHA3.S[15] ^= SHA3.toLane64(message, rr, 24) + SHA3.S[20] ^= SHA3.toLane64(message, rr, 32) + SHA3.S[ 1] ^= SHA3.toLane64(message, rr, 40) + SHA3.S[ 6] ^= SHA3.toLane64(message, rr, 48) + SHA3.S[11] ^= SHA3.toLane64(message, rr, 56) + SHA3.S[16] ^= SHA3.toLane64(message, rr, 64) + SHA3.S[21] ^= SHA3.toLane64(message, rr, 72) + SHA3.S[ 2] ^= SHA3.toLane64(message, rr, 80) + SHA3.S[ 7] ^= SHA3.toLane64(message, rr, 88) + SHA3.S[12] ^= SHA3.toLane64(message, rr, 96) + SHA3.S[17] ^= SHA3.toLane64(message, rr, 104) + SHA3.S[22] ^= SHA3.toLane64(message, rr, 112) + SHA3.S[ 3] ^= SHA3.toLane64(message, rr, 120) + SHA3.S[ 8] ^= SHA3.toLane64(message, rr, 128) + SHA3.S[13] ^= SHA3.toLane64(message, rr, 136) + SHA3.S[18] ^= SHA3.toLane64(message, rr, 144) + SHA3.S[23] ^= SHA3.toLane64(message, rr, 152) + SHA3.S[ 4] ^= SHA3.toLane64(message, rr, 160) + SHA3.S[ 9] ^= SHA3.toLane64(message, rr, 168) + SHA3.S[14] ^= SHA3.toLane64(message, rr, 176) + SHA3.S[19] ^= SHA3.toLane64(message, rr, 184) + SHA3.S[24] ^= SHA3.toLane64(message, rr, 192) + SHA3.keccakF(SHA3.S) + message = message[rr:] + else: + for i in range(0, nnn, rr): + SHA3.S[ 0] ^= SHA3.toLane(message, rr, ww, 0) + SHA3.S[ 5] ^= SHA3.toLane(message, rr, ww, ww) + SHA3.S[10] ^= SHA3.toLane(message, rr, ww, 2 * ww) + SHA3.S[15] ^= SHA3.toLane(message, rr, ww, 3 * ww) + SHA3.S[20] ^= SHA3.toLane(message, rr, ww, 4 * ww) + SHA3.S[ 1] ^= SHA3.toLane(message, rr, ww, 5 * ww) + SHA3.S[ 6] ^= SHA3.toLane(message, rr, ww, 6 * ww) + SHA3.S[11] ^= SHA3.toLane(message, rr, ww, 7 * ww) + SHA3.S[16] ^= SHA3.toLane(message, rr, ww, 8 * ww) + SHA3.S[21] ^= SHA3.toLane(message, rr, ww, 9 * ww) + SHA3.S[ 2] ^= SHA3.toLane(message, rr, ww, 10 * ww) + SHA3.S[ 7] ^= SHA3.toLane(message, rr, ww, 11 * ww) + SHA3.S[12] ^= SHA3.toLane(message, rr, ww, 12 * ww) + SHA3.S[17] ^= SHA3.toLane(message, rr, ww, 13 * ww) + SHA3.S[22] ^= SHA3.toLane(message, rr, ww, 14 * ww) + SHA3.S[ 3] ^= SHA3.toLane(message, rr, ww, 15 * ww) + SHA3.S[ 8] ^= SHA3.toLane(message, rr, ww, 16 * ww) + SHA3.S[13] ^= SHA3.toLane(message, rr, ww, 17 * ww) + SHA3.S[18] ^= SHA3.toLane(message, rr, ww, 18 * ww) + SHA3.S[23] ^= SHA3.toLane(message, rr, ww, 19 * ww) + SHA3.S[ 4] ^= SHA3.toLane(message, rr, ww, 20 * ww) + SHA3.S[ 9] ^= SHA3.toLane(message, rr, ww, 21 * ww) + SHA3.S[14] ^= SHA3.toLane(message, rr, ww, 22 * ww) + SHA3.S[19] ^= SHA3.toLane(message, rr, ww, 23 * ww) + SHA3.S[24] ^= SHA3.toLane(message, rr, ww, 24 * ww) + message = message[rr:] + SHA3.keccakF(SHA3.S) + + # Squeezing phase + if withReturn: + rc = [0] * ((SHA3.n + 7) >> 3) + ptr = 0 + + olen = SHA3.n + j = 0 + ni = min(25, rr) + while olen > 0: + i = 0 + while (i < ni) and (j < nn): + v = SHA3.S[(i % 5) * 5 + i // 5] + for _ in range(ww): + if j < nn: + rc[ptr] = v & 255 + ptr += 1 + v >>= 8 + j += 1 + i += 1 + olen -= SHA3.r + if olen > 0: + SHA3.keccakF(SHA3.S) + if (SHA3.n & 7) != 0: + rc[len(rc) - 1] &= (1 << (SHA3.n & 7)) - 1 + + return bytes(rc) + + olen = SHA3.n + while olen > SHA3.r: + olen -= SHA3.r + SHA3.keccakF(SHA3.S) + return None + + + def simpleSqueeze(times = 1): + ''' + Force some rounds of Keccak-f + + @param times:int The number of rounds + ''' + for i in range(times): + SHA3.keccakF(SHA3.S) + + + def fastSqueeze(times = 1): + ''' + Squeeze as much as is needed to get a digest a number of times + + @param times:int The number of digests + ''' + for i in range(times): + SHA3.keccakF(SHA3.S) # Last squeeze did not do a ending squeeze + olen = SHA3.n + while olen > SHA3.r: + olen -= SHA3.r + SHA3.keccakF(SHA3.S) + + + def squeeze(): + ''' + Squeeze out another digest + + @return :bytes The hash sum + ''' + SHA3.keccakF(SHA3.S) # Last squeeze did not do a ending squeeze + + nn = (SHA3.n + 7) >> 3 + ww = SHA3.w >> 3 + rc = [0] * nn + olen = SHA3.n + j = 0 + ptr = 0 + ni = min(25, SHA3.r >> 3) + + while olen > 0: + i = 0 + while (i < ni) and (j < nn): + v = SHA3.S[(i % 5) * 5 + i // 5] + for _ in range(ww): + if j < nn: + rc[ptr] = v + ptr += 1 + v >>= 8 + j += 1 + i += 1 + olen -= SHA3.r + if olen > 0: + SHA3.keccakF(SHA3.S) + + if (SHA3.n & 7) != 0: + rc[len(rc) - 1] &= (1 << (SHA3.n & 7)) - 1 + + return bytes(rc) + -- cgit v1.2.3-70-g09d2