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 */ 64static const unsigned char desx_white_in2out[256]={ 650xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0, 660x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A, 670x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36, 680x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C, 690x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60, 700x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA, 710xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E, 720xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF, 730x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6, 740xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3, 750x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C, 760xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2, 770x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5, 780x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5, 790x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F, 800xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB, 81 }; 82 83void 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 112void 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 } 197 198