diff options
Diffstat (limited to 'src/model/python')
| -rwxr-xr-x | src/model/python/sha512.py | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/src/model/python/sha512.py b/src/model/python/sha512.py new file mode 100755 index 0000000..844c9ef --- /dev/null +++ b/src/model/python/sha512.py @@ -0,0 +1,345 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +#======================================================================= +# +# sha512.py +# --------- +# Simple, pure Python model of the SHA-512 hash function. Used as a +# reference for the HW implementation. The code follows the structure +# of the HW implementation as much as possible. +# +# +# Author: Joachim Strömbergson +# Copyright (c) 2014, SUNET +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or +# without modification, are permitted provided that the following +# conditions are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +#======================================================================= + +#------------------------------------------------------------------- +# Python module imports. +#------------------------------------------------------------------- +import sys + + +#------------------------------------------------------------------- +# Constants. +#------------------------------------------------------------------- +MAX_64BIT = 0xffffffffffffffff + + +#------------------------------------------------------------------- +# ChaCha() +#------------------------------------------------------------------- +class SHA512(): + def __init__(self, mode = 'MODE_SHA_512', verbose = 0): + assert mode in ['MODE_SHA_512_224', 'MODE_SHA_512_256', + 'MODE_SHA_384', 'MODE_SHA_512'] + self.mode = mode + self.verbose = verbose + self.mode + self.NUM_ROUNDS = 80 + self.H = [0] * 8 + self.t1 = 0 + self.t2 = 0 + self.a = 0 + self.b = 0 + self.c = 0 + self.d = 0 + self.e = 0 + self.f = 0 + self.g = 0 + self.h = 0 + self.w = 0 + self.W = [0] * 16 + self.k = 0 + self.K = [0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, + 0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019, + 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, + 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, + 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, + 0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, + 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275, + 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, + 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, + 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725, + 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, + 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, + 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, + 0x92722c851482353b, 0xa2bfe8a14cf10364, 0xa81a664bbc423001, + 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218, + 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, + 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, + 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, + 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, + 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, + 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, + 0xc67178f2e372532b, 0xca273eceea26619c, 0xd186b8c721c0c207, + 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, + 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, + 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, + 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, + 0x5fcb6fab3ad6faec, 0x6c44198c4a475817] + + + def init(self): + if self.mode == 'MODE_SHA_512_224': + self.H = [0x8c3d37c819544da2, 0x73e1996689dcd4d6, + 0x1dfab7ae32ff9c82, 0x679dd514582f9fcf, + 0x0f6d2b697bd44da8, 0x77e36f7304c48942, + 0x3f9d85a86a1d36c8, 0x1112e6ad91d692a1] + + elif self.mode == 'MODE_SHA_512_256': + self.H = [0x22312194fc2bf72c, 0x9f555fa3c84c64c2, + 0x2393b86b6f53b151, 0x963877195940eabd, + 0x96283ee2a88effe3, 0xbe5e1e2553863992, + 0x2b0199fc2c85b8aa, 0x0eb72ddc81c52ca2] + + elif self.mode == 'MODE_SHA_384': + self.H = [0xcbbb9d5dc1059ed8, 0x629a292a367cd507, + 0x9159015a3070dd17, 0x152fecd8f70e5939, + 0x67332667ffc00b31, 0x8eb44a8768581511, + 0xdb0c2e0d64f98fa7, 0x47b5481dbefa4fa4] + + elif self.mode == 'MODE_SHA_512': + self.H = [0x6a09e667f3bcc908, 0xbb67ae8584caa73b, + 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1, + 0x510e527fade682d1, 0x9b05688c2b3e6c1f, + 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179] + + + def next(self, block): + self._W_schedule(block) + self._copy_digest() + if self.verbose: + print("State after init:") + self._print_state(0) + + for i in range(self.NUM_ROUNDS): + self._sha512_round(i) + if self.verbose: + self._print_state(i) + + self._update_digest() + + + def get_digest(self): + if self.mode == 'MODE_SHA_512_224': + return self.H[0:3] # FIX THIS! + + elif self.mode == 'MODE_SHA_512_256': + return self.H[0:4] + + elif self.mode == 'MODE_SHA_384': + return self.H[0:6] + + elif self.mode == 'MODE_SHA_512': + return self.H + + + def _copy_digest(self): + self.a = self.H[0] + self.b = self.H[1] + self.c = self.H[2] + self.d = self.H[3] + self.e = self.H[4] + self.f = self.H[5] + self.g = self.H[6] + self.h = self.H[7] + + + def _update_digest(self): + self.H[0] = (self.H[0] + self.a) & MAX_64BIT + self.H[1] = (self.H[1] + self.b) & MAX_64BIT + self.H[2] = (self.H[2] + self.c) & MAX_64BIT + self.H[3] = (self.H[3] + self.d) & MAX_64BIT + self.H[4] = (self.H[4] + self.e) & MAX_64BIT + self.H[5] = (self.H[5] + self.f) & MAX_64BIT + self.H[6] = (self.H[6] + self.g) & MAX_64BIT + self.H[7] = (self.H[7] + self.h) & MAX_64BIT + + + def _print_state(self, round): + print("State at round 0x%02x:" % round) + print("t1 = 0x%016x, t2 = 0x%016x" % (self.t1, self.t2)) + print("k = 0x%016x, w = 0x%016x" % (self.k, self.w)) + print("a = 0x%016x, b = 0x%016x" % (self.a, self.b)) + print("c = 0x%016x, d = 0x%016x" % (self.c, self.d)) + print("e = 0x%016x, f = 0x%016x" % (self.e, self.f)) + print("g = 0x%016x, h = 0x%016x" % (self.g, self.h)) + print("") + + + def _sha512_round(self, round): + self.k = self.K[round] + self.w = self._next_w(round) + self.t1 = self._T1(self.e, self.f, self.g, self.h, self.k, self.w) + self.t2 = self._T2(self.a, self.b, self.c) + self.h = self.g + self.g = self.f + self.f = self.e + self.e = (self.d + self.t1) & MAX_64BIT + self.d = self.c + self.c = self.b + self.b = self.a + self.a = (self.t1 + self.t2) & MAX_64BIT + + + def _next_w(self, round): + if (round < 16): + return self.W[round] + + else: + tmp_w = (self._delta1(self.W[14]) + + self.W[9] + + self._delta0(self.W[1]) + + self.W[0]) & MAX_64BIT + for i in range(15): + self.W[i] = self.W[(i+1)] + self.W[15] = tmp_w + return tmp_w + + + def _W_schedule(self, block): + for i in range(16): + self.W[i] = block[i] + + + def _Ch(self, x, y, z): + return (x & y) ^ (~x & z) + + + def _Maj(self, x, y, z): + return (x & y) ^ (x & z) ^ (y & z) + + def _sigma0(self, x): + return (self._rotr64(x, 28) ^ self._rotr64(x, 34) ^ self._rotr64(x, 39)) + + + def _sigma1(self, x): + return (self._rotr64(x, 14) ^ self._rotr64(x, 18) ^ self._rotr64(x, 41)) + + + def _delta0(self, x): + return (self._rotr64(x, 1) ^ self._rotr64(x, 8) ^ self._shr64(x, 7)) + + + def _delta1(self, x): + return (self._rotr64(x, 19) ^ self._rotr64(x, 61) ^ self._shr64(x, 6)) + + + def _T1(self, e, f, g, h, k, w): + return (h + self._sigma1(e) + self._Ch(e, f, g) + k + w) & MAX_64BIT + + + def _T2(self, a, b, c): + return (self._sigma0(a) + self._Maj(a, b, c)) & MAX_64BIT + + + def _rotr64(self, n, r): + return ((n >> r) | (n << (64 - r))) & MAX_64BIT + + + def _shr64(self, n, r): + return (n >> r) + + +def compare_digests(digest, expected): + if (digest != expected): + print("Error:") + print("Got:") + print(digest) + print("Expected:") + print(expected) + else: + print("Test case ok.") + + +#------------------------------------------------------------------- +# main() +# +# If executed tests the ChaCha class using known test vectors. +#------------------------------------------------------------------- +def main(): + print("Testing the SHA-512 Python model.") + print("---------------------------------") + print + + # Single block message. + TC1_block = [0x6162638000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, + 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, + 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, + 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000018] + + + my_sha512 = SHA512(mode = 'MODE_SHA_512', verbose=1); + TC1_expected = [0xDDAF35A193617ABA, 0xCC417349AE204131, 0x12E6FA4E89A97EA2, 0x0A9EEEE64B55D39A, + 0x2192992A274FC1A8, 0x36BA3C23A3FEEBBD, 0x454D4423643CE80E, 0x2A9AC94FA54CA49F] + my_sha512.init() + my_sha512.next(TC1_block) + my_digest = my_sha512.get_digest() + compare_digests(my_digest, TC1_expected) + + + my_sha512 = SHA512(mode = 'MODE_SHA_512_224', verbose=1); + TC2_expected = [0x4634270F707B6A54, 0xDAAE7530460842E2, 0x0E37ED265CEEE9A4, 0x3E8924AA00000000] + my_sha512.init() + my_sha512.next(TC1_block) + my_digest = my_sha512.get_digest() + compare_digests(my_digest, TC2_expected) + + + my_sha512 = SHA512(mode = 'MODE_SHA_512_256', verbose=1); + TC3_expected = [0x53048E2681941EF9, 0x9B2E29B76B4C7DAB, 0xE4C2D0C634FC6D46, 0xE0E2F13107E7AF23] + my_sha512.init() + my_sha512.next(TC1_block) + my_digest = my_sha512.get_digest() + compare_digests(my_digest, TC3_expected) + + + my_sha512 = SHA512(mode = 'MODE_SHA_384', verbose=1); + TC4_expected = [0xCB00753F45A35E8B, 0xB5A03D699AC65007, 0x272C32AB0EDED163, 0x1A8B605A43FF5BED, + 0x8086072BA1E7CC23, 0x58BAECA134C825A7] + my_sha512.init() + my_sha512.next(TC1_block) + my_digest = my_sha512.get_digest() + compare_digests(my_digest, TC4_expected) + + + +#------------------------------------------------------------------- +# __name__ +# Python thingy which allows the file to be run standalone as +# well as parsed from within a Python interpreter. +#------------------------------------------------------------------- +if __name__=="__main__": + # Run the main function. + sys.exit(main()) + +#======================================================================= +# EOF sha512.py +#======================================================================= |