Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 specifically looks for this */ |
| 64 | static const unsigned char desx_white_in2out[256]={ |
| 65 | 0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0, |
| 66 | 0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A, |
| 67 | 0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36, |
| 68 | 0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C, |
| 69 | 0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60, |
| 70 | 0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA, |
| 71 | 0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E, |
| 72 | 0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF, |
| 73 | 0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6, |
| 74 | 0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3, |
| 75 | 0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C, |
| 76 | 0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2, |
| 77 | 0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5, |
| 78 | 0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5, |
| 79 | 0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F, |
| 80 | 0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB, |
| 81 | }; |
| 82 | |
| 83 | void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white, |
| 84 | DES_cblock *out_white) |
| 85 | { |
| 86 | int out0,out1; |
| 87 | int i; |
| 88 | const unsigned char *key = &(*des_key)[0]; |
| 89 | const unsigned char *in = &(*in_white)[0]; |
| 90 | unsigned char *out = &(*out_white)[0]; |
| 91 | |
| 92 | out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0; |
| 93 | out0=out1=0; |
| 94 | for (i=0; i<8; i++) |
| 95 | { |
| 96 | out[i]=key[i]^desx_white_in2out[out0^out1]; |
| 97 | out0=out1; |
| 98 | out1=(int)out[i&0x07]; |
| 99 | } |
| 100 | |
| 101 | out0=out[0]; |
| 102 | out1=out[i]; /* BUG: out-of-bounds read */ |
| 103 | for (i=0; i<8; i++) |
| 104 | { |
| 105 | out[i]=in[i]^desx_white_in2out[out0^out1]; |
| 106 | out0=out1; |
| 107 | out1=(int)out[i&0x07]; |
| 108 | } |
| 109 | } |
| 110 | #endif |
| 111 | |
| 112 | void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, |
| 113 | long length, DES_key_schedule *schedule, |
| 114 | DES_cblock *ivec, const_DES_cblock *inw, |
| 115 | const_DES_cblock *outw, int enc) |
| 116 | { |
| 117 | register DES_LONG tin0,tin1; |
| 118 | register DES_LONG tout0,tout1,xor0,xor1; |
| 119 | register DES_LONG inW0,inW1,outW0,outW1; |
| 120 | register const unsigned char *in2; |
| 121 | register long l=length; |
| 122 | DES_LONG tin[2]; |
| 123 | unsigned char *iv; |
| 124 | |
| 125 | in2 = &(*inw)[0]; |
| 126 | c2l(in2,inW0); |
| 127 | c2l(in2,inW1); |
| 128 | in2 = &(*outw)[0]; |
| 129 | c2l(in2,outW0); |
| 130 | c2l(in2,outW1); |
| 131 | |
| 132 | iv = &(*ivec)[0]; |
| 133 | |
| 134 | if (enc) |
| 135 | { |
| 136 | c2l(iv,tout0); |
| 137 | c2l(iv,tout1); |
| 138 | for (l-=8; l>=0; l-=8) |
| 139 | { |
| 140 | c2l(in,tin0); |
| 141 | c2l(in,tin1); |
| 142 | tin0^=tout0^inW0; tin[0]=tin0; |
| 143 | tin1^=tout1^inW1; tin[1]=tin1; |
| 144 | DES_encrypt1(tin,schedule,DES_ENCRYPT); |
| 145 | tout0=tin[0]^outW0; l2c(tout0,out); |
| 146 | tout1=tin[1]^outW1; l2c(tout1,out); |
| 147 | } |
| 148 | if (l != -8) |
| 149 | { |
| 150 | c2ln(in,tin0,tin1,l+8); |
| 151 | tin0^=tout0^inW0; tin[0]=tin0; |
| 152 | tin1^=tout1^inW1; tin[1]=tin1; |
| 153 | DES_encrypt1(tin,schedule,DES_ENCRYPT); |
| 154 | tout0=tin[0]^outW0; l2c(tout0,out); |
| 155 | tout1=tin[1]^outW1; l2c(tout1,out); |
| 156 | } |
| 157 | iv = &(*ivec)[0]; |
| 158 | l2c(tout0,iv); |
| 159 | l2c(tout1,iv); |
| 160 | } |
| 161 | else |
| 162 | { |
| 163 | c2l(iv,xor0); |
| 164 | c2l(iv,xor1); |
| 165 | for (l-=8; l>0; l-=8) |
| 166 | { |
| 167 | c2l(in,tin0); tin[0]=tin0^outW0; |
| 168 | c2l(in,tin1); tin[1]=tin1^outW1; |
| 169 | DES_encrypt1(tin,schedule,DES_DECRYPT); |
| 170 | tout0=tin[0]^xor0^inW0; |
| 171 | tout1=tin[1]^xor1^inW1; |
| 172 | l2c(tout0,out); |
| 173 | l2c(tout1,out); |
| 174 | xor0=tin0; |
| 175 | xor1=tin1; |
| 176 | } |
| 177 | if (l != -8) |
| 178 | { |
| 179 | c2l(in,tin0); tin[0]=tin0^outW0; |
| 180 | c2l(in,tin1); tin[1]=tin1^outW1; |
| 181 | DES_encrypt1(tin,schedule,DES_DECRYPT); |
| 182 | tout0=tin[0]^xor0^inW0; |
| 183 | tout1=tin[1]^xor1^inW1; |
| 184 | l2cn(tout0,tout1,out,l+8); |
| 185 | xor0=tin0; |
| 186 | xor1=tin1; |
| 187 | } |
| 188 | |
| 189 | iv = &(*ivec)[0]; |
| 190 | l2c(xor0,iv); |
| 191 | l2c(xor1,iv); |
| 192 | } |
| 193 | tin0=tin1=tout0=tout1=xor0=xor1=0; |
| 194 | inW0=inW1=outW0=outW1=0; |
| 195 | tin[0]=tin[1]=0; |
| 196 | } |
| 197 | |