[80] | 1 | // |
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| 2 | // MD5Engine.cpp |
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| 3 | // |
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| 4 | // $Id: //poco/1.3/Foundation/src/MD5Engine.cpp#2 $ |
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| 5 | // |
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| 6 | // Library: Foundation |
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| 7 | // Package: Crypt |
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| 8 | // Module: MD5Engine |
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| 9 | // |
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| 10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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| 11 | // and Contributors. |
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| 12 | // |
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| 13 | // Permission is hereby granted, free of charge, to any person or organization |
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| 14 | // obtaining a copy of the software and accompanying documentation covered by |
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| 15 | // this license (the "Software") to use, reproduce, display, distribute, |
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| 16 | // execute, and transmit the Software, and to prepare derivative works of the |
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| 17 | // Software, and to permit third-parties to whom the Software is furnished to |
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| 18 | // do so, all subject to the following: |
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| 19 | // |
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| 20 | // The copyright notices in the Software and this entire statement, including |
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| 21 | // the above license grant, this restriction and the following disclaimer, |
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| 22 | // must be included in all copies of the Software, in whole or in part, and |
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| 23 | // all derivative works of the Software, unless such copies or derivative |
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| 24 | // works are solely in the form of machine-executable object code generated by |
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| 25 | // a source language processor. |
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| 26 | // |
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| 27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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| 30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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| 31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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| 32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 33 | // DEALINGS IN THE SOFTWARE. |
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| 34 | // |
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| 35 | // |
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| 36 | // MD5 (RFC 1321) algorithm: |
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| 37 | // Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All |
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| 38 | // rights reserved. |
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| 39 | // |
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| 40 | // License to copy and use this software is granted provided that it |
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| 41 | // is identified as the "RSA Data Security, Inc. MD5 Message-Digest |
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| 42 | // Algorithm" in all material mentioning or referencing this software |
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| 43 | // or this function. |
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| 44 | // |
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| 45 | // License is also granted to make and use derivative works provided |
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| 46 | // that such works are identified as "derived from the RSA Data |
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| 47 | // Security, Inc. MD5 Message-Digest Algorithm" in all material |
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| 48 | // mentioning or referencing the derived work. |
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| 49 | // |
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| 50 | // RSA Data Security, Inc. makes no representations concerning either |
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| 51 | // the merchantability of this software or the suitability of this |
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| 52 | // software for any particular purpose. It is provided "as is" |
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| 53 | // without express or implied warranty of any kind. |
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| 54 | // |
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| 55 | // These notices must be retained in any copies of any part of this |
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| 56 | // documentation and/or software. |
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| 57 | // |
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| 58 | |
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| 59 | |
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| 60 | #include "Poco/MD5Engine.h" |
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| 61 | #include <cstring> |
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| 62 | |
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| 63 | |
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| 64 | namespace Poco { |
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| 65 | |
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| 66 | |
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| 67 | MD5Engine::MD5Engine() |
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| 68 | { |
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| 69 | _digest.reserve(16); |
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| 70 | reset(); |
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| 71 | } |
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| 72 | |
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| 73 | |
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| 74 | MD5Engine::~MD5Engine() |
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| 75 | { |
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| 76 | reset(); |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | void MD5Engine::updateImpl(const void* input_, unsigned inputLen) |
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| 81 | { |
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| 82 | const unsigned char* input = (const unsigned char*) input_; |
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| 83 | unsigned int i, index, partLen; |
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| 84 | |
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| 85 | /* Compute number of bytes mod 64 */ |
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| 86 | index = (unsigned int)((_context.count[0] >> 3) & 0x3F); |
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| 87 | |
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| 88 | /* Update number of bits */ |
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| 89 | if ((_context.count[0] += ((UInt32) inputLen << 3)) < ((UInt32) inputLen << 3)) |
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| 90 | _context.count[1]++; |
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| 91 | _context.count[1] += ((UInt32) inputLen >> 29); |
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| 92 | |
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| 93 | partLen = 64 - index; |
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| 94 | |
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| 95 | /* Transform as many times as possible. */ |
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| 96 | if (inputLen >= partLen) |
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| 97 | { |
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| 98 | std::memcpy(&_context.buffer[index], input, partLen); |
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| 99 | transform(_context.state, _context.buffer); |
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| 100 | |
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| 101 | for (i = partLen; i + 63 < inputLen; i += 64) |
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| 102 | transform(_context.state, &input[i]); |
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| 103 | |
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| 104 | index = 0; |
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| 105 | } |
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| 106 | else i = 0; |
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| 107 | |
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| 108 | /* Buffer remaining input */ |
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| 109 | std::memcpy(&_context.buffer[index], &input[i],inputLen-i); |
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| 110 | } |
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| 111 | |
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| 112 | |
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| 113 | unsigned MD5Engine::digestLength() const |
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| 114 | { |
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| 115 | return DIGEST_SIZE; |
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| 116 | } |
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| 117 | |
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| 118 | |
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| 119 | void MD5Engine::reset() |
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| 120 | { |
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| 121 | std::memset(&_context, 0, sizeof(_context)); |
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| 122 | _context.count[0] = _context.count[1] = 0; |
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| 123 | _context.state[0] = 0x67452301; |
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| 124 | _context.state[1] = 0xefcdab89; |
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| 125 | _context.state[2] = 0x98badcfe; |
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| 126 | _context.state[3] = 0x10325476; |
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| 127 | } |
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| 128 | |
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| 129 | |
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| 130 | const DigestEngine::Digest& MD5Engine::digest() |
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| 131 | { |
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| 132 | static const unsigned char PADDING[64] = |
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| 133 | { |
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| 134 | 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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| 135 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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| 136 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
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| 137 | }; |
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| 138 | unsigned char bits[8]; |
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| 139 | unsigned int index, padLen; |
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| 140 | |
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| 141 | /* Save number of bits */ |
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| 142 | encode(bits, _context.count, 8); |
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| 143 | |
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| 144 | /* Pad out to 56 mod 64. */ |
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| 145 | index = (unsigned int)((_context.count[0] >> 3) & 0x3f); |
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| 146 | padLen = (index < 56) ? (56 - index) : (120 - index); |
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| 147 | update(PADDING, padLen); |
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| 148 | |
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| 149 | /* Append length (before padding) */ |
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| 150 | update(bits, 8); |
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| 151 | |
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| 152 | /* Store state in digest */ |
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| 153 | unsigned char digest[16]; |
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| 154 | encode(digest, _context.state, 16); |
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| 155 | _digest.clear(); |
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| 156 | _digest.insert(_digest.begin(), digest, digest + sizeof(digest)); |
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| 157 | |
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| 158 | /* Zeroize sensitive information. */ |
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| 159 | std::memset(&_context, 0, sizeof (_context)); |
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| 160 | reset(); |
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| 161 | return _digest; |
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| 162 | } |
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| 163 | |
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| 164 | |
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| 165 | /* Constants for MD5Transform routine. */ |
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| 166 | #define S11 7 |
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| 167 | #define S12 12 |
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| 168 | #define S13 17 |
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| 169 | #define S14 22 |
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| 170 | #define S21 5 |
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| 171 | #define S22 9 |
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| 172 | #define S23 14 |
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| 173 | #define S24 20 |
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| 174 | #define S31 4 |
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| 175 | #define S32 11 |
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| 176 | #define S33 16 |
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| 177 | #define S34 23 |
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| 178 | #define S41 6 |
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| 179 | #define S42 10 |
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| 180 | #define S43 15 |
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| 181 | #define S44 21 |
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| 182 | |
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| 183 | |
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| 184 | /* F, G, H and I are basic MD5 functions. */ |
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| 185 | #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) |
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| 186 | #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) |
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| 187 | #define H(x, y, z) ((x) ^ (y) ^ (z)) |
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| 188 | #define I(x, y, z) ((y) ^ ((x) | (~z))) |
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| 189 | |
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| 190 | |
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| 191 | /* ROTATE_LEFT rotates x left n bits. */ |
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| 192 | #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) |
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| 193 | |
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| 194 | |
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| 195 | /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. |
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| 196 | Rotation is separate from addition to prevent recomputation. */ |
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| 197 | #define FF(a, b, c, d, x, s, ac) { \ |
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| 198 | (a) += F ((b), (c), (d)) + (x) + (UInt32)(ac); \ |
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| 199 | (a) = ROTATE_LEFT ((a), (s)); \ |
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| 200 | (a) += (b); \ |
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| 201 | } |
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| 202 | #define GG(a, b, c, d, x, s, ac) { \ |
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| 203 | (a) += G ((b), (c), (d)) + (x) + (UInt32)(ac); \ |
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| 204 | (a) = ROTATE_LEFT ((a), (s)); \ |
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| 205 | (a) += (b); \ |
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| 206 | } |
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| 207 | #define HH(a, b, c, d, x, s, ac) { \ |
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| 208 | (a) += H ((b), (c), (d)) + (x) + (UInt32)(ac); \ |
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| 209 | (a) = ROTATE_LEFT ((a), (s)); \ |
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| 210 | (a) += (b); \ |
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| 211 | } |
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| 212 | #define II(a, b, c, d, x, s, ac) { \ |
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| 213 | (a) += I ((b), (c), (d)) + (x) + (UInt32)(ac); \ |
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| 214 | (a) = ROTATE_LEFT ((a), (s)); \ |
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| 215 | (a) += (b); \ |
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| 216 | } |
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| 217 | |
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| 218 | |
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| 219 | void MD5Engine::transform (UInt32 state[4], const unsigned char block[64]) |
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| 220 | { |
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| 221 | UInt32 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; |
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| 222 | |
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| 223 | decode(x, block, 64); |
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| 224 | |
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| 225 | /* Round 1 */ |
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| 226 | FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ |
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| 227 | FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ |
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| 228 | FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ |
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| 229 | FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ |
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| 230 | FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ |
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| 231 | FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ |
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| 232 | FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ |
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| 233 | FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ |
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| 234 | FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ |
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| 235 | FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ |
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| 236 | FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ |
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| 237 | FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ |
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| 238 | FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ |
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| 239 | FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ |
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| 240 | FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ |
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| 241 | FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ |
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| 242 | |
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| 243 | /* Round 2 */ |
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| 244 | GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ |
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| 245 | GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ |
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| 246 | GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ |
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| 247 | GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ |
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| 248 | GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ |
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| 249 | GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ |
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| 250 | GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ |
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| 251 | GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ |
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| 252 | GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ |
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| 253 | GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ |
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| 254 | GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ |
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| 255 | GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ |
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| 256 | GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ |
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| 257 | GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ |
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| 258 | GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ |
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| 259 | GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ |
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| 260 | |
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| 261 | /* Round 3 */ |
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| 262 | HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ |
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| 263 | HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ |
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| 264 | HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ |
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| 265 | HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ |
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| 266 | HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ |
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| 267 | HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ |
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| 268 | HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ |
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| 269 | HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ |
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| 270 | HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ |
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| 271 | HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ |
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| 272 | HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ |
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| 273 | HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ |
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| 274 | HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ |
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| 275 | HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ |
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| 276 | HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ |
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| 277 | HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ |
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| 278 | |
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| 279 | /* Round 4 */ |
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| 280 | II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ |
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| 281 | II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ |
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| 282 | II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ |
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| 283 | II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ |
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| 284 | II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ |
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| 285 | II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ |
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| 286 | II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ |
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| 287 | II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ |
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| 288 | II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ |
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| 289 | II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ |
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| 290 | II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ |
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| 291 | II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ |
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| 292 | II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ |
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| 293 | II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ |
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| 294 | II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ |
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| 295 | II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ |
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| 296 | |
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| 297 | state[0] += a; |
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| 298 | state[1] += b; |
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| 299 | state[2] += c; |
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| 300 | state[3] += d; |
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| 301 | |
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| 302 | /* Zeroize sensitive information. */ |
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| 303 | std::memset(x, 0, sizeof(x)); |
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| 304 | } |
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| 305 | |
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| 306 | |
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| 307 | void MD5Engine::encode(unsigned char* output, const UInt32* input, unsigned int len) |
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| 308 | { |
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| 309 | unsigned int i, j; |
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| 310 | |
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| 311 | for (i = 0, j = 0; j < len; i++, j += 4) |
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| 312 | { |
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| 313 | output[j] = (unsigned char)(input[i] & 0xff); |
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| 314 | output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); |
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| 315 | output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); |
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| 316 | output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); |
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| 317 | } |
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| 318 | } |
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| 319 | |
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| 320 | |
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| 321 | void MD5Engine::decode(UInt32* output, const unsigned char* input, unsigned int len) |
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| 322 | { |
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| 323 | unsigned int i, j; |
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| 324 | |
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| 325 | for (i = 0, j = 0; j < len; i++, j += 4) |
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| 326 | output[i] = ((UInt32)input[j]) | (((UInt32)input[j+1]) << 8) | |
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| 327 | (((UInt32)input[j+2]) << 16) | (((UInt32)input[j+3]) << 24); |
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| 328 | } |
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| 329 | |
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| 330 | |
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| 331 | } // namespace Poco |
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