diff options
Diffstat (limited to 'extra/yassl/taocrypt/src/md2.cpp')
| -rw-r--r-- | extra/yassl/taocrypt/src/md2.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/extra/yassl/taocrypt/src/md2.cpp b/extra/yassl/taocrypt/src/md2.cpp new file mode 100644 index 00000000000..16834b6bc89 --- /dev/null +++ b/extra/yassl/taocrypt/src/md2.cpp @@ -0,0 +1,128 @@ +/* md2.cpp + * + * Copyright (C) 2003 Sawtooth Consulting Ltd. + * + * This file is part of yaSSL. + * + * yaSSL is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * yaSSL 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + + +/* based on Wei Dai's md2.cpp from CryptoPP */ + +#include "runtime.hpp" +#include "md2.hpp" +#include <string.h> + +namespace TaoCrypt { + + +MD2::MD2() + : X_(X_SIZE), C_(BLOCK_SIZE), buffer_(BLOCK_SIZE) +{ + Init(); +} + +void MD2::Init() +{ + memset(X_.get_buffer(), 0, X_SIZE); + memset(C_.get_buffer(), 0, BLOCK_SIZE); + memset(buffer_.get_buffer(), 0, BLOCK_SIZE); + count_ = 0; +} + + +void MD2::Update(const byte* data, word32 len) +{ + + static const byte S[256] = + { + 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6, + 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188, + 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24, + 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251, + 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63, + 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50, + 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165, + 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210, + 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157, + 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27, + 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15, + 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197, + 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65, + 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123, + 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233, + 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228, + 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237, + 31, 26, 219, 153, 141, 51, 159, 17, 131, 20 + }; + + while (len) { + word32 L = (PAD_SIZE - count_) < len ? (PAD_SIZE - count_) : len; + memcpy(buffer_.get_buffer() + count_, data, L); + count_ += L; + data += L; + len -= L; + + if (count_==PAD_SIZE) { + count_ = 0; + memcpy(X_.get_buffer() + PAD_SIZE, buffer_.get_buffer(), PAD_SIZE); + byte t = C_[15]; + + int i; + for(i = 0; i < PAD_SIZE; i++) { + X_[32 + i] = X_[PAD_SIZE + i] ^ X_[i]; + t = C_[i] ^= S[buffer_[i] ^ t]; + } + + t=0; + for(i = 0; i < 18; i++) { + for(int j = 0; j < X_SIZE; j += 8) { + t = X_[j+0] ^= S[t]; + t = X_[j+1] ^= S[t]; + t = X_[j+2] ^= S[t]; + t = X_[j+3] ^= S[t]; + t = X_[j+4] ^= S[t]; + t = X_[j+5] ^= S[t]; + t = X_[j+6] ^= S[t]; + t = X_[j+7] ^= S[t]; + } + t = (t + i) & 0xFF; + } + } + } +} + + +void MD2::Final(byte *hash) +{ + byte padding[BLOCK_SIZE]; + word32 padLen = PAD_SIZE - count_; + + for (word32 i = 0; i < padLen; i++) + padding[i] = static_cast<byte>(padLen); + + Update(padding, padLen); + Update(C_.get_buffer(), BLOCK_SIZE); + + memcpy(hash, X_.get_buffer(), DIGEST_SIZE); + + Init(); +} + + + + +} // namespace |