xcbc_enc.c revision 296465
1/* crypto/des/xcbc_enc.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59#include "des_locl.h" 60 61/* RSA's DESX */ 62 63#if 0 /* broken code, preserved just in case anyone 64 * specifically looks for this */ 65static unsigned char desx_white_in2out[256] = { 66 0xBD, 0x56, 0xEA, 0xF2, 0xA2, 0xF1, 0xAC, 0x2A, 0xB0, 0x93, 0xD1, 0x9C, 67 0x1B, 0x33, 0xFD, 0xD0, 68 0x30, 0x04, 0xB6, 0xDC, 0x7D, 0xDF, 0x32, 0x4B, 0xF7, 0xCB, 0x45, 0x9B, 69 0x31, 0xBB, 0x21, 0x5A, 70 0x41, 0x9F, 0xE1, 0xD9, 0x4A, 0x4D, 0x9E, 0xDA, 0xA0, 0x68, 0x2C, 0xC3, 71 0x27, 0x5F, 0x80, 0x36, 72 0x3E, 0xEE, 0xFB, 0x95, 0x1A, 0xFE, 0xCE, 0xA8, 0x34, 0xA9, 0x13, 0xF0, 73 0xA6, 0x3F, 0xD8, 0x0C, 74 0x78, 0x24, 0xAF, 0x23, 0x52, 0xC1, 0x67, 0x17, 0xF5, 0x66, 0x90, 0xE7, 75 0xE8, 0x07, 0xB8, 0x60, 76 0x48, 0xE6, 0x1E, 0x53, 0xF3, 0x92, 0xA4, 0x72, 0x8C, 0x08, 0x15, 0x6E, 77 0x86, 0x00, 0x84, 0xFA, 78 0xF4, 0x7F, 0x8A, 0x42, 0x19, 0xF6, 0xDB, 0xCD, 0x14, 0x8D, 0x50, 0x12, 79 0xBA, 0x3C, 0x06, 0x4E, 80 0xEC, 0xB3, 0x35, 0x11, 0xA1, 0x88, 0x8E, 0x2B, 0x94, 0x99, 0xB7, 0x71, 81 0x74, 0xD3, 0xE4, 0xBF, 82 0x3A, 0xDE, 0x96, 0x0E, 0xBC, 0x0A, 0xED, 0x77, 0xFC, 0x37, 0x6B, 0x03, 83 0x79, 0x89, 0x62, 0xC6, 84 0xD7, 0xC0, 0xD2, 0x7C, 0x6A, 0x8B, 0x22, 0xA3, 0x5B, 0x05, 0x5D, 0x02, 85 0x75, 0xD5, 0x61, 0xE3, 86 0x18, 0x8F, 0x55, 0x51, 0xAD, 0x1F, 0x0B, 0x5E, 0x85, 0xE5, 0xC2, 0x57, 87 0x63, 0xCA, 0x3D, 0x6C, 88 0xB4, 0xC5, 0xCC, 0x70, 0xB2, 0x91, 0x59, 0x0D, 0x47, 0x20, 0xC8, 0x4F, 89 0x58, 0xE0, 0x01, 0xE2, 90 0x16, 0x38, 0xC4, 0x6F, 0x3B, 0x0F, 0x65, 0x46, 0xBE, 0x7E, 0x2D, 0x7B, 91 0x82, 0xF9, 0x40, 0xB5, 92 0x1D, 0x73, 0xF8, 0xEB, 0x26, 0xC7, 0x87, 0x97, 0x25, 0x54, 0xB1, 0x28, 93 0xAA, 0x98, 0x9D, 0xA5, 94 0x64, 0x6D, 0x7A, 0xD4, 0x10, 0x81, 0x44, 0xEF, 0x49, 0xD6, 0xAE, 0x2E, 95 0xDD, 0x76, 0x5C, 0x2F, 96 0xA7, 0x1C, 0xC9, 0x09, 0x69, 0x9A, 0x83, 0xCF, 0x29, 0x39, 0xB9, 0xE9, 97 0x4C, 0xFF, 0x43, 0xAB, 98}; 99 100void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white, 101 DES_cblock *out_white) 102{ 103 int out0, out1; 104 int i; 105 const unsigned char *key = &(*des_key)[0]; 106 const unsigned char *in = &(*in_white)[0]; 107 unsigned char *out = &(*out_white)[0]; 108 109 out[0] = out[1] = out[2] = out[3] = out[4] = out[5] = out[6] = out[7] = 0; 110 out0 = out1 = 0; 111 for (i = 0; i < 8; i++) { 112 out[i] = key[i] ^ desx_white_in2out[out0 ^ out1]; 113 out0 = out1; 114 out1 = (int)out[i & 0x07]; 115 } 116 117 out0 = out[0]; 118 out1 = out[i]; /* BUG: out-of-bounds read */ 119 for (i = 0; i < 8; i++) { 120 out[i] = in[i] ^ desx_white_in2out[out0 ^ out1]; 121 out0 = out1; 122 out1 = (int)out[i & 0x07]; 123 } 124} 125#endif 126 127void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, 128 long length, DES_key_schedule *schedule, 129 DES_cblock *ivec, const_DES_cblock *inw, 130 const_DES_cblock *outw, int enc) 131{ 132 register DES_LONG tin0, tin1; 133 register DES_LONG tout0, tout1, xor0, xor1; 134 register DES_LONG inW0, inW1, outW0, outW1; 135 register const unsigned char *in2; 136 register long l = length; 137 DES_LONG tin[2]; 138 unsigned char *iv; 139 140 in2 = &(*inw)[0]; 141 c2l(in2, inW0); 142 c2l(in2, inW1); 143 in2 = &(*outw)[0]; 144 c2l(in2, outW0); 145 c2l(in2, outW1); 146 147 iv = &(*ivec)[0]; 148 149 if (enc) { 150 c2l(iv, tout0); 151 c2l(iv, tout1); 152 for (l -= 8; l >= 0; l -= 8) { 153 c2l(in, tin0); 154 c2l(in, tin1); 155 tin0 ^= tout0 ^ inW0; 156 tin[0] = tin0; 157 tin1 ^= tout1 ^ inW1; 158 tin[1] = tin1; 159 DES_encrypt1(tin, schedule, DES_ENCRYPT); 160 tout0 = tin[0] ^ outW0; 161 l2c(tout0, out); 162 tout1 = tin[1] ^ outW1; 163 l2c(tout1, out); 164 } 165 if (l != -8) { 166 c2ln(in, tin0, tin1, l + 8); 167 tin0 ^= tout0 ^ inW0; 168 tin[0] = tin0; 169 tin1 ^= tout1 ^ inW1; 170 tin[1] = tin1; 171 DES_encrypt1(tin, schedule, DES_ENCRYPT); 172 tout0 = tin[0] ^ outW0; 173 l2c(tout0, out); 174 tout1 = tin[1] ^ outW1; 175 l2c(tout1, out); 176 } 177 iv = &(*ivec)[0]; 178 l2c(tout0, iv); 179 l2c(tout1, iv); 180 } else { 181 c2l(iv, xor0); 182 c2l(iv, xor1); 183 for (l -= 8; l > 0; l -= 8) { 184 c2l(in, tin0); 185 tin[0] = tin0 ^ outW0; 186 c2l(in, tin1); 187 tin[1] = tin1 ^ outW1; 188 DES_encrypt1(tin, schedule, DES_DECRYPT); 189 tout0 = tin[0] ^ xor0 ^ inW0; 190 tout1 = tin[1] ^ xor1 ^ inW1; 191 l2c(tout0, out); 192 l2c(tout1, out); 193 xor0 = tin0; 194 xor1 = tin1; 195 } 196 if (l != -8) { 197 c2l(in, tin0); 198 tin[0] = tin0 ^ outW0; 199 c2l(in, tin1); 200 tin[1] = tin1 ^ outW1; 201 DES_encrypt1(tin, schedule, DES_DECRYPT); 202 tout0 = tin[0] ^ xor0 ^ inW0; 203 tout1 = tin[1] ^ xor1 ^ inW1; 204 l2cn(tout0, tout1, out, l + 8); 205 xor0 = tin0; 206 xor1 = tin1; 207 } 208 209 iv = &(*ivec)[0]; 210 l2c(xor0, iv); 211 l2c(xor1, iv); 212 } 213 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 214 inW0 = inW1 = outW0 = outW1 = 0; 215 tin[0] = tin[1] = 0; 216} 217