Francois Berder / cyassl-lib

fork of cyassl-lib

Dependents:   TLS_cyassl TLS_cyassl

ctaocrypt/src/md2.c@2:e784a2103975, 2013-09-12 (annotated)

Committer:
feb11
Date:
Thu Sep 12 16:36:37 2013 +0000
Revision:
2:e784a2103975
Parent:
0:714293de3836 
unchanged

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ashleymills 0:714293de3836 1 /* md2.c
ashleymills 0:714293de3836 2 *
ashleymills 0:714293de3836 3 * Copyright (C) 2006-2013 wolfSSL Inc.
ashleymills 0:714293de3836 4 *
ashleymills 0:714293de3836 5 * This file is part of CyaSSL.
ashleymills 0:714293de3836 6 *
ashleymills 0:714293de3836 7 * CyaSSL is free software; you can redistribute it and/or modify
ashleymills 0:714293de3836 8 * it under the terms of the GNU General Public License as published by
ashleymills 0:714293de3836 9 * the Free Software Foundation; either version 2 of the License, or
ashleymills 0:714293de3836 10 * (at your option) any later version.
ashleymills 0:714293de3836 11 *
ashleymills 0:714293de3836 12 * CyaSSL is distributed in the hope that it will be useful,
ashleymills 0:714293de3836 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ashleymills 0:714293de3836 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ashleymills 0:714293de3836 15 * GNU General Public License for more details.
ashleymills 0:714293de3836 16 *
ashleymills 0:714293de3836 17 * You should have received a copy of the GNU General Public License
ashleymills 0:714293de3836 18 * along with this program; if not, write to the Free Software
ashleymills 0:714293de3836 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
ashleymills 0:714293de3836 20 */
ashleymills 0:714293de3836 21
ashleymills 0:714293de3836 22
ashleymills 0:714293de3836 23 #ifdef HAVE_CONFIG_H
ashleymills 0:714293de3836 24 #include <config.h>
ashleymills 0:714293de3836 25 #endif
ashleymills 0:714293de3836 26
ashleymills 0:714293de3836 27 #include <cyassl/ctaocrypt/settings.h>
ashleymills 0:714293de3836 28
feb11 2:e784a2103975 29 //#ifdef CYASSL_MD2
ashleymills 0:714293de3836 30
ashleymills 0:714293de3836 31 #include <cyassl/ctaocrypt/md2.h>
ashleymills 0:714293de3836 32 #ifdef NO_INLINE
ashleymills 0:714293de3836 33 #include <cyassl/ctaocrypt/misc.h>
ashleymills 0:714293de3836 34 #else
ashleymills 0:714293de3836 35 #include <ctaocrypt/src/misc.c>
ashleymills 0:714293de3836 36 #endif
ashleymills 0:714293de3836 37
ashleymills 0:714293de3836 38
ashleymills 0:714293de3836 39 void InitMd2(Md2* md2)
ashleymills 0:714293de3836 40 {
ashleymills 0:714293de3836 41 XMEMSET(md2->X, 0, MD2_X_SIZE);
ashleymills 0:714293de3836 42 XMEMSET(md2->C, 0, MD2_BLOCK_SIZE);
ashleymills 0:714293de3836 43 XMEMSET(md2->buffer, 0, MD2_BLOCK_SIZE);
ashleymills 0:714293de3836 44 md2->count = 0;
ashleymills 0:714293de3836 45 }
ashleymills 0:714293de3836 46
ashleymills 0:714293de3836 47
ashleymills 0:714293de3836 48 void Md2Update(Md2* md2, const byte* data, word32 len)
ashleymills 0:714293de3836 49 {
ashleymills 0:714293de3836 50 static const byte S[256] =
ashleymills 0:714293de3836 51 {
ashleymills 0:714293de3836 52 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
ashleymills 0:714293de3836 53 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
ashleymills 0:714293de3836 54 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
ashleymills 0:714293de3836 55 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
ashleymills 0:714293de3836 56 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
ashleymills 0:714293de3836 57 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
ashleymills 0:714293de3836 58 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
ashleymills 0:714293de3836 59 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
ashleymills 0:714293de3836 60 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
ashleymills 0:714293de3836 61 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
ashleymills 0:714293de3836 62 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
ashleymills 0:714293de3836 63 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
ashleymills 0:714293de3836 64 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
ashleymills 0:714293de3836 65 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
ashleymills 0:714293de3836 66 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
ashleymills 0:714293de3836 67 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
ashleymills 0:714293de3836 68 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
ashleymills 0:714293de3836 69 31, 26, 219, 153, 141, 51, 159, 17, 131, 20
ashleymills 0:714293de3836 70 };
ashleymills 0:714293de3836 71
ashleymills 0:714293de3836 72 while (len) {
ashleymills 0:714293de3836 73 word32 L = (MD2_PAD_SIZE - md2->count) < len ?
ashleymills 0:714293de3836 74 (MD2_PAD_SIZE - md2->count) : len;
ashleymills 0:714293de3836 75 XMEMCPY(md2->buffer + md2->count, data, L);
ashleymills 0:714293de3836 76 md2->count += L;
ashleymills 0:714293de3836 77 data += L;
ashleymills 0:714293de3836 78 len -= L;
ashleymills 0:714293de3836 79
ashleymills 0:714293de3836 80 if (md2->count == MD2_PAD_SIZE) {
ashleymills 0:714293de3836 81 int i;
ashleymills 0:714293de3836 82 byte t;
ashleymills 0:714293de3836 83
ashleymills 0:714293de3836 84 md2->count = 0;
ashleymills 0:714293de3836 85 XMEMCPY(md2->X + MD2_PAD_SIZE, md2->buffer, MD2_PAD_SIZE);
ashleymills 0:714293de3836 86 t = md2->C[15];
ashleymills 0:714293de3836 87
ashleymills 0:714293de3836 88 for(i = 0; i < MD2_PAD_SIZE; i++) {
ashleymills 0:714293de3836 89 md2->X[32 + i] = md2->X[MD2_PAD_SIZE + i] ^ md2->X[i];
ashleymills 0:714293de3836 90 t = md2->C[i] ^= S[md2->buffer[i] ^ t];
ashleymills 0:714293de3836 91 }
ashleymills 0:714293de3836 92
ashleymills 0:714293de3836 93 t=0;
ashleymills 0:714293de3836 94 for(i = 0; i < 18; i++) {
ashleymills 0:714293de3836 95 int j;
ashleymills 0:714293de3836 96 for(j = 0; j < MD2_X_SIZE; j += 8) {
ashleymills 0:714293de3836 97 t = md2->X[j+0] ^= S[t];
ashleymills 0:714293de3836 98 t = md2->X[j+1] ^= S[t];
ashleymills 0:714293de3836 99 t = md2->X[j+2] ^= S[t];
ashleymills 0:714293de3836 100 t = md2->X[j+3] ^= S[t];
ashleymills 0:714293de3836 101 t = md2->X[j+4] ^= S[t];
ashleymills 0:714293de3836 102 t = md2->X[j+5] ^= S[t];
ashleymills 0:714293de3836 103 t = md2->X[j+6] ^= S[t];
ashleymills 0:714293de3836 104 t = md2->X[j+7] ^= S[t];
ashleymills 0:714293de3836 105 }
ashleymills 0:714293de3836 106 t = (t + i) & 0xFF;
ashleymills 0:714293de3836 107 }
ashleymills 0:714293de3836 108 }
ashleymills 0:714293de3836 109 }
ashleymills 0:714293de3836 110 }
ashleymills 0:714293de3836 111
ashleymills 0:714293de3836 112
ashleymills 0:714293de3836 113 void Md2Final(Md2* md2, byte* hash)
ashleymills 0:714293de3836 114 {
ashleymills 0:714293de3836 115 byte padding[MD2_BLOCK_SIZE];
ashleymills 0:714293de3836 116 word32 padLen = MD2_PAD_SIZE - md2->count;
ashleymills 0:714293de3836 117 word32 i;
ashleymills 0:714293de3836 118
ashleymills 0:714293de3836 119 for (i = 0; i < padLen; i++)
ashleymills 0:714293de3836 120 padding[i] = (byte)padLen;
ashleymills 0:714293de3836 121
ashleymills 0:714293de3836 122 Md2Update(md2, padding, padLen);
ashleymills 0:714293de3836 123 Md2Update(md2, md2->C, MD2_BLOCK_SIZE);
ashleymills 0:714293de3836 124
ashleymills 0:714293de3836 125 XMEMCPY(hash, md2->X, MD2_DIGEST_SIZE);
ashleymills 0:714293de3836 126
ashleymills 0:714293de3836 127 InitMd2(md2);
ashleymills 0:714293de3836 128 }
ashleymills 0:714293de3836 129
ashleymills 0:714293de3836 130
feb11 2:e784a2103975 131 //#endif /* CYASSL_MD2 */