| 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] |
| 56 | */ |
| 57 | |
| 58 | #include <sys/cdefs.h> |
| 59 | __KERNEL_RCSID(0, "$NetBSD: des_cbc.c,v 1.8 2005/12/11 12:20:52 christos Exp $" ); |
| 60 | |
| 61 | #include <sys/types.h> |
| 62 | |
| 63 | #include <crypto/des/des_locl.h> |
| 64 | |
| 65 | void des_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
| 66 | des_key_schedule schedule, des_cblock *ivec, int enc) |
| 67 | { |
| 68 | register DES_LONG tin0,tin1; |
| 69 | register DES_LONG tout0,tout1,xor0,xor1; |
| 70 | register long l=length; |
| 71 | DES_LONG tin[2]; |
| 72 | unsigned char *iv; |
| 73 | |
| 74 | iv = &(*ivec)[0]; |
| 75 | |
| 76 | if (enc) |
| 77 | { |
| 78 | c2l(iv,tout0); |
| 79 | c2l(iv,tout1); |
| 80 | for (l-=8; l>=0; l-=8) |
| 81 | { |
| 82 | c2l(in,tin0); |
| 83 | c2l(in,tin1); |
| 84 | tin0^=tout0; tin[0]=tin0; |
| 85 | tin1^=tout1; tin[1]=tin1; |
| 86 | des_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); |
| 87 | tout0=tin[0]; l2c(tout0,out); |
| 88 | tout1=tin[1]; l2c(tout1,out); |
| 89 | } |
| 90 | if (l != -8) |
| 91 | { |
| 92 | c2ln(in,tin0,tin1,l+8); |
| 93 | tin0^=tout0; tin[0]=tin0; |
| 94 | tin1^=tout1; tin[1]=tin1; |
| 95 | des_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); |
| 96 | tout0=tin[0]; l2c(tout0,out); |
| 97 | tout1=tin[1]; l2c(tout1,out); |
| 98 | } |
| 99 | iv = &(*ivec)[0]; |
| 100 | l2c(tout0,iv); |
| 101 | l2c(tout1,iv); |
| 102 | } |
| 103 | else |
| 104 | { |
| 105 | c2l(iv,xor0); |
| 106 | c2l(iv,xor1); |
| 107 | for (l-=8; l>=0; l-=8) |
| 108 | { |
| 109 | c2l(in,tin0); tin[0]=tin0; |
| 110 | c2l(in,tin1); tin[1]=tin1; |
| 111 | des_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT); |
| 112 | tout0=tin[0]^xor0; |
| 113 | tout1=tin[1]^xor1; |
| 114 | l2c(tout0,out); |
| 115 | l2c(tout1,out); |
| 116 | xor0=tin0; |
| 117 | xor1=tin1; |
| 118 | } |
| 119 | if (l != -8) |
| 120 | { |
| 121 | c2l(in,tin0); tin[0]=tin0; |
| 122 | c2l(in,tin1); tin[1]=tin1; |
| 123 | des_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT); |
| 124 | tout0=tin[0]^xor0; |
| 125 | tout1=tin[1]^xor1; |
| 126 | l2cn(tout0,tout1,out,l+8); |
| 127 | xor0=tin0; |
| 128 | xor1=tin1; |
| 129 | } |
| 130 | iv = &(*ivec)[0]; |
| 131 | l2c(xor0,iv); |
| 132 | l2c(xor1,iv); |
| 133 | } |
| 134 | tin0=tin1=tout0=tout1=xor0=xor1=0; |
| 135 | tin[0]=tin[1]=0; |
| 136 | } |
| 137 | |
| 138 | void des_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, |
| 139 | long length, des_key_schedule ks1, des_key_schedule ks2, |
| 140 | des_key_schedule ks3, des_cblock *ivec, int enc) |
| 141 | { |
| 142 | register DES_LONG tin0,tin1; |
| 143 | register DES_LONG tout0,tout1,xor0,xor1; |
| 144 | register const unsigned char *in; |
| 145 | unsigned char *out; |
| 146 | register long l=length; |
| 147 | DES_LONG tin[2]; |
| 148 | unsigned char *iv; |
| 149 | |
| 150 | in=input; |
| 151 | out=output; |
| 152 | iv = &(*ivec)[0]; |
| 153 | |
| 154 | if (enc) |
| 155 | { |
| 156 | c2l(iv,tout0); |
| 157 | c2l(iv,tout1); |
| 158 | for (l-=8; l>=0; l-=8) |
| 159 | { |
| 160 | c2l(in,tin0); |
| 161 | c2l(in,tin1); |
| 162 | tin0^=tout0; |
| 163 | tin1^=tout1; |
| 164 | |
| 165 | tin[0]=tin0; |
| 166 | tin[1]=tin1; |
| 167 | des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); |
| 168 | tout0=tin[0]; |
| 169 | tout1=tin[1]; |
| 170 | |
| 171 | l2c(tout0,out); |
| 172 | l2c(tout1,out); |
| 173 | } |
| 174 | if (l != -8) |
| 175 | { |
| 176 | c2ln(in,tin0,tin1,l+8); |
| 177 | tin0^=tout0; |
| 178 | tin1^=tout1; |
| 179 | |
| 180 | tin[0]=tin0; |
| 181 | tin[1]=tin1; |
| 182 | des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); |
| 183 | tout0=tin[0]; |
| 184 | tout1=tin[1]; |
| 185 | |
| 186 | l2c(tout0,out); |
| 187 | l2c(tout1,out); |
| 188 | } |
| 189 | iv = &(*ivec)[0]; |
| 190 | l2c(tout0,iv); |
| 191 | l2c(tout1,iv); |
| 192 | } |
| 193 | else |
| 194 | { |
| 195 | register DES_LONG t0,t1; |
| 196 | |
| 197 | c2l(iv,xor0); |
| 198 | c2l(iv,xor1); |
| 199 | for (l-=8; l>=0; l-=8) |
| 200 | { |
| 201 | c2l(in,tin0); |
| 202 | c2l(in,tin1); |
| 203 | |
| 204 | t0=tin0; |
| 205 | t1=tin1; |
| 206 | |
| 207 | tin[0]=tin0; |
| 208 | tin[1]=tin1; |
| 209 | des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); |
| 210 | tout0=tin[0]; |
| 211 | tout1=tin[1]; |
| 212 | |
| 213 | tout0^=xor0; |
| 214 | tout1^=xor1; |
| 215 | l2c(tout0,out); |
| 216 | l2c(tout1,out); |
| 217 | xor0=t0; |
| 218 | xor1=t1; |
| 219 | } |
| 220 | if (l != -8) |
| 221 | { |
| 222 | c2l(in,tin0); |
| 223 | c2l(in,tin1); |
| 224 | |
| 225 | t0=tin0; |
| 226 | t1=tin1; |
| 227 | |
| 228 | tin[0]=tin0; |
| 229 | tin[1]=tin1; |
| 230 | des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); |
| 231 | tout0=tin[0]; |
| 232 | tout1=tin[1]; |
| 233 | |
| 234 | tout0^=xor0; |
| 235 | tout1^=xor1; |
| 236 | l2cn(tout0,tout1,out,l+8); |
| 237 | xor0=t0; |
| 238 | xor1=t1; |
| 239 | } |
| 240 | |
| 241 | iv = &(*ivec)[0]; |
| 242 | l2c(xor0,iv); |
| 243 | l2c(xor1,iv); |
| 244 | } |
| 245 | tin0=tin1=tout0=tout1=xor0=xor1=0; |
| 246 | tin[0]=tin[1]=0; |
| 247 | } |
| 248 | |