1 /* crypto/des/ede_enc.c */ 2 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@mincom.oz.au). 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@mincom.oz.au). 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@mincom.oz.au)" 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@mincom.oz.au)" 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 void des_ede3_cbc_encrypt(input, output, length, ks1, ks2, ks3, ivec, encrypt) 62 des_cblock (*input); 63 des_cblock (*output); 64 long length; 65 des_key_schedule ks1; 66 des_key_schedule ks2; 67 des_key_schedule ks3; 68 des_cblock (*ivec); 69 int encrypt; 70 { 71 register DES_LONG tin0,tin1; 72 register DES_LONG tout0,tout1,xor0,xor1; 73 register unsigned char *in,*out; 74 register long l=length; 75 DES_LONG tin[2]; 76 unsigned char *iv; 77 78 in=(unsigned char *)input; 79 out=(unsigned char *)output; 80 iv=(unsigned char *)ivec; 81 82 if (encrypt) 83 { 84 c2l(iv,tout0); 85 c2l(iv,tout1); 86 for (l-=8; l>=0; l-=8) 87 { 88 c2l(in,tin0); 89 c2l(in,tin1); 90 tin0^=tout0; 91 tin1^=tout1; 92 93 tin[0]=tin0; 94 tin[1]=tin1; 95 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 96 tout0=tin[0]; 97 tout1=tin[1]; 98 99 l2c(tout0,out); 100 l2c(tout1,out); 101 } 102 if (l != -8) 103 { 104 c2ln(in,tin0,tin1,l+8); 105 tin0^=tout0; 106 tin1^=tout1; 107 108 tin[0]=tin0; 109 tin[1]=tin1; 110 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 111 tout0=tin[0]; 112 tout1=tin[1]; 113 114 l2c(tout0,out); 115 l2c(tout1,out); 116 } 117 iv=(unsigned char *)ivec; 118 l2c(tout0,iv); 119 l2c(tout1,iv); 120 } 121 else 122 { 123 register DES_LONG t0,t1; 124 125 c2l(iv,xor0); 126 c2l(iv,xor1); 127 for (l-=8; l>=0; l-=8) 128 { 129 c2l(in,tin0); 130 c2l(in,tin1); 131 132 t0=tin0; 133 t1=tin1; 134 135 tin[0]=tin0; 136 tin[1]=tin1; 137 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 138 tout0=tin[0]; 139 tout1=tin[1]; 140 141 tout0^=xor0; 142 tout1^=xor1; 143 l2c(tout0,out); 144 l2c(tout1,out); 145 xor0=t0; 146 xor1=t1; 147 } 148 if (l != -8) 149 { 150 c2l(in,tin0); 151 c2l(in,tin1); 152 153 t0=tin0; 154 t1=tin1; 155 156 tin[0]=tin0; 157 tin[1]=tin1; 158 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 159 tout0=tin[0]; 160 tout1=tin[1]; 161 162 tout0^=xor0; 163 tout1^=xor1; 164 l2cn(tout0,tout1,out,l+8); 165 xor0=t0; 166 xor1=t1; 167 } 168 iv=(unsigned char *)ivec; 169 l2c(xor0,iv); 170 l2c(xor1,iv); 171 } 172 tin0=tin1=tout0=tout1=xor0=xor1=0; 173 tin[0]=tin[1]=0; 174 } 175 176 #ifdef undef /* MACRO */ 177 void des_ede2_cbc_encrypt(input, output, length, ks1, ks2, ivec, enc) 178 des_cblock (*input); 179 des_cblock (*output); 180 long length; 181 des_key_schedule ks1; 182 des_key_schedule ks2; 183 des_cblock (*ivec); 184 int enc; 185 { 186 des_ede3_cbc_encrypt(input,output,length,ks1,ks2,ks1,ivec,enc); 187 } 188 #endif 189 190