1/* 2 * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved. 3 * 4 * The contents of this file constitute Original Code as defined in and are 5 * subject to the Apple Public Source License Version 1.2 (the 'License'). 6 * You may not use this file except in compliance with the License. Please obtain 7 * a copy of the License at http://www.apple.com/publicsource and read it before 8 * using this file. 9 * 10 * This Original Code and all software distributed under the License are 11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS 12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT 13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the 15 * specific language governing rights and limitations under the License. 16 */ 17 18 19/* crypto/rc5/rc5_enc.c */ 20/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 21 * All rights reserved. 22 * 23 * This package is an SSL implementation written 24 * by Eric Young (eay@cryptsoft.com). 25 * The implementation was written so as to conform with Netscapes SSL. 26 * 27 * This library is free for commercial and non-commercial use as long as 28 * the following conditions are aheared to. The following conditions 29 * apply to all code found in this distribution, be it the RC4, RSA, 30 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 31 * included with this distribution is covered by the same copyright terms 32 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 33 * 34 * Copyright remains Eric Young's, and as such any Copyright notices in 35 * the code are not to be removed. 36 * If this package is used in a product, Eric Young should be given attribution 37 * as the author of the parts of the library used. 38 * This can be in the form of a textual message at program startup or 39 * in documentation (online or textual) provided with the package. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * "This product includes cryptographic software written by 52 * Eric Young (eay@cryptsoft.com)" 53 * The word 'cryptographic' can be left out if the rouines from the library 54 * being used are not cryptographic related :-). 55 * 4. If you include any Windows specific code (or a derivative thereof) from 56 * the apps directory (application code) you must include an acknowledgement: 57 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 58 * 59 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * The licence and distribution terms for any publically available version or 72 * derivative of this code cannot be changed. i.e. this code cannot simply be 73 * copied and put under another distribution licence 74 * [including the GNU Public Licence.] 75 */ 76 77#include <stdio.h> 78#include <openssl/rc5.h> 79#include "rc5_locl.h" 80 81#ifndef _OPENSSL_APPLE_CDSA_ 82void RC5_32_cbc_encrypt(unsigned char *in, unsigned char *out, long length, 83 RC5_32_KEY *ks, unsigned char *iv, int encrypt) 84 { 85 register unsigned long tin0,tin1; 86 register unsigned long tout0,tout1,xor0,xor1; 87 register long l=length; 88 unsigned long tin[2]; 89 90 if (encrypt) 91 { 92 c2l(iv,tout0); 93 c2l(iv,tout1); 94 iv-=8; 95 for (l-=8; l>=0; l-=8) 96 { 97 c2l(in,tin0); 98 c2l(in,tin1); 99 tin0^=tout0; 100 tin1^=tout1; 101 tin[0]=tin0; 102 tin[1]=tin1; 103 RC5_32_encrypt(tin,ks); 104 tout0=tin[0]; l2c(tout0,out); 105 tout1=tin[1]; l2c(tout1,out); 106 } 107 if (l != -8) 108 { 109 c2ln(in,tin0,tin1,l+8); 110 tin0^=tout0; 111 tin1^=tout1; 112 tin[0]=tin0; 113 tin[1]=tin1; 114 RC5_32_encrypt(tin,ks); 115 tout0=tin[0]; l2c(tout0,out); 116 tout1=tin[1]; l2c(tout1,out); 117 } 118 l2c(tout0,iv); 119 l2c(tout1,iv); 120 } 121 else 122 { 123 c2l(iv,xor0); 124 c2l(iv,xor1); 125 iv-=8; 126 for (l-=8; l>=0; l-=8) 127 { 128 c2l(in,tin0); tin[0]=tin0; 129 c2l(in,tin1); tin[1]=tin1; 130 RC5_32_decrypt(tin,ks); 131 tout0=tin[0]^xor0; 132 tout1=tin[1]^xor1; 133 l2c(tout0,out); 134 l2c(tout1,out); 135 xor0=tin0; 136 xor1=tin1; 137 } 138 if (l != -8) 139 { 140 c2l(in,tin0); tin[0]=tin0; 141 c2l(in,tin1); tin[1]=tin1; 142 RC5_32_decrypt(tin,ks); 143 tout0=tin[0]^xor0; 144 tout1=tin[1]^xor1; 145 l2cn(tout0,tout1,out,l+8); 146 xor0=tin0; 147 xor1=tin1; 148 } 149 l2c(xor0,iv); 150 l2c(xor1,iv); 151 } 152 tin0=tin1=tout0=tout1=xor0=xor1=0; 153 tin[0]=tin[1]=0; 154 } 155 156#endif 157 158#ifdef _OPENSSL_APPLE_CDSA_ 159void RC5_32_encrypt(RC5_32_INT *d, RC5_32_KEY *key) 160#else 161void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key) 162#endif /* _OPENSSL_APPLE_CDSA_ */ 163 { 164 RC5_32_INT a,b,*s; 165 166 s=key->data; 167 168 a=d[0]+s[0]; 169 b=d[1]+s[1]; 170 E_RC5_32(a,b,s, 2); 171 E_RC5_32(a,b,s, 4); 172 E_RC5_32(a,b,s, 6); 173 E_RC5_32(a,b,s, 8); 174 E_RC5_32(a,b,s,10); 175 E_RC5_32(a,b,s,12); 176 E_RC5_32(a,b,s,14); 177 E_RC5_32(a,b,s,16); 178 if (key->rounds == 12) 179 { 180 E_RC5_32(a,b,s,18); 181 E_RC5_32(a,b,s,20); 182 E_RC5_32(a,b,s,22); 183 E_RC5_32(a,b,s,24); 184 } 185 else if (key->rounds == 16) 186 { 187 /* Do a full expansion to avoid a jump */ 188 E_RC5_32(a,b,s,18); 189 E_RC5_32(a,b,s,20); 190 E_RC5_32(a,b,s,22); 191 E_RC5_32(a,b,s,24); 192 E_RC5_32(a,b,s,26); 193 E_RC5_32(a,b,s,28); 194 E_RC5_32(a,b,s,30); 195 E_RC5_32(a,b,s,32); 196 } 197 d[0]=a; 198 d[1]=b; 199 } 200 201#ifdef _OPENSSL_APPLE_CDSA_ 202void RC5_32_decrypt(RC5_32_INT *d, RC5_32_KEY *key) 203#else 204void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key) 205#endif /* _OPENSSL_APPLE_CDSA_*/ 206 { 207 RC5_32_INT a,b,*s; 208 209 s=key->data; 210 211 a=d[0]; 212 b=d[1]; 213 if (key->rounds == 16) 214 { 215 D_RC5_32(a,b,s,32); 216 D_RC5_32(a,b,s,30); 217 D_RC5_32(a,b,s,28); 218 D_RC5_32(a,b,s,26); 219 /* Do a full expansion to avoid a jump */ 220 D_RC5_32(a,b,s,24); 221 D_RC5_32(a,b,s,22); 222 D_RC5_32(a,b,s,20); 223 D_RC5_32(a,b,s,18); 224 } 225 else if (key->rounds == 12) 226 { 227 D_RC5_32(a,b,s,24); 228 D_RC5_32(a,b,s,22); 229 D_RC5_32(a,b,s,20); 230 D_RC5_32(a,b,s,18); 231 } 232 D_RC5_32(a,b,s,16); 233 D_RC5_32(a,b,s,14); 234 D_RC5_32(a,b,s,12); 235 D_RC5_32(a,b,s,10); 236 D_RC5_32(a,b,s, 8); 237 D_RC5_32(a,b,s, 6); 238 D_RC5_32(a,b,s, 4); 239 D_RC5_32(a,b,s, 2); 240 d[0]=a-s[0]; 241 d[1]=b-s[1]; 242 } 243 244