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| 1 /* crypto/bf/bf_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 <openssl/blowfish.h> | |
| 60 #include "bf_locl.h" | |
| 61 | |
| 62 /* Blowfish as implemented from 'Blowfish: Springer-Verlag paper' | |
| 63 * (From LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, | |
| 64 * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) | |
| 65 */ | |
| 66 | |
| 67 #if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) | |
| 68 #error If you set BF_ROUNDS to some value other than 16 or 20, you will have \ | |
| 69 to modify the code. | |
| 70 #endif | |
| 71 | |
| 72 void BF_encrypt(BF_LONG *data, const BF_KEY *key) | |
| 73 { | |
| 74 #ifndef BF_PTR2 | |
| 75 register BF_LONG l,r; | |
| 76 register const BF_LONG *p,*s; | |
| 77 | |
| 78 p=key->P; | |
| 79 s= &(key->S[0]); | |
| 80 l=data[0]; | |
| 81 r=data[1]; | |
| 82 | |
| 83 l^=p[0]; | |
| 84 BF_ENC(r,l,s,p[ 1]); | |
| 85 BF_ENC(l,r,s,p[ 2]); | |
| 86 BF_ENC(r,l,s,p[ 3]); | |
| 87 BF_ENC(l,r,s,p[ 4]); | |
| 88 BF_ENC(r,l,s,p[ 5]); | |
| 89 BF_ENC(l,r,s,p[ 6]); | |
| 90 BF_ENC(r,l,s,p[ 7]); | |
| 91 BF_ENC(l,r,s,p[ 8]); | |
| 92 BF_ENC(r,l,s,p[ 9]); | |
| 93 BF_ENC(l,r,s,p[10]); | |
| 94 BF_ENC(r,l,s,p[11]); | |
| 95 BF_ENC(l,r,s,p[12]); | |
| 96 BF_ENC(r,l,s,p[13]); | |
| 97 BF_ENC(l,r,s,p[14]); | |
| 98 BF_ENC(r,l,s,p[15]); | |
| 99 BF_ENC(l,r,s,p[16]); | |
| 100 #if BF_ROUNDS == 20 | |
| 101 BF_ENC(r,l,s,p[17]); | |
| 102 BF_ENC(l,r,s,p[18]); | |
| 103 BF_ENC(r,l,s,p[19]); | |
| 104 BF_ENC(l,r,s,p[20]); | |
| 105 #endif | |
| 106 r^=p[BF_ROUNDS+1]; | |
| 107 | |
| 108 data[1]=l&0xffffffffL; | |
| 109 data[0]=r&0xffffffffL; | |
| 110 #else | |
| 111 register BF_LONG l,r,t,*k; | |
| 112 | |
| 113 l=data[0]; | |
| 114 r=data[1]; | |
| 115 k=(BF_LONG*)key; | |
| 116 | |
| 117 l^=k[0]; | |
| 118 BF_ENC(r,l,k, 1); | |
| 119 BF_ENC(l,r,k, 2); | |
| 120 BF_ENC(r,l,k, 3); | |
| 121 BF_ENC(l,r,k, 4); | |
| 122 BF_ENC(r,l,k, 5); | |
| 123 BF_ENC(l,r,k, 6); | |
| 124 BF_ENC(r,l,k, 7); | |
| 125 BF_ENC(l,r,k, 8); | |
| 126 BF_ENC(r,l,k, 9); | |
| 127 BF_ENC(l,r,k,10); | |
| 128 BF_ENC(r,l,k,11); | |
| 129 BF_ENC(l,r,k,12); | |
| 130 BF_ENC(r,l,k,13); | |
| 131 BF_ENC(l,r,k,14); | |
| 132 BF_ENC(r,l,k,15); | |
| 133 BF_ENC(l,r,k,16); | |
| 134 #if BF_ROUNDS == 20 | |
| 135 BF_ENC(r,l,k,17); | |
| 136 BF_ENC(l,r,k,18); | |
| 137 BF_ENC(r,l,k,19); | |
| 138 BF_ENC(l,r,k,20); | |
| 139 #endif | |
| 140 r^=k[BF_ROUNDS+1]; | |
| 141 | |
| 142 data[1]=l&0xffffffffL; | |
| 143 data[0]=r&0xffffffffL; | |
| 144 #endif | |
| 145 } | |
| 146 | |
| 147 #ifndef BF_DEFAULT_OPTIONS | |
| 148 | |
| 149 void BF_decrypt(BF_LONG *data, const BF_KEY *key) | |
| 150 { | |
| 151 #ifndef BF_PTR2 | |
| 152 register BF_LONG l,r; | |
| 153 register const BF_LONG *p,*s; | |
| 154 | |
| 155 p=key->P; | |
| 156 s= &(key->S[0]); | |
| 157 l=data[0]; | |
| 158 r=data[1]; | |
| 159 | |
| 160 l^=p[BF_ROUNDS+1]; | |
| 161 #if BF_ROUNDS == 20 | |
| 162 BF_ENC(r,l,s,p[20]); | |
| 163 BF_ENC(l,r,s,p[19]); | |
| 164 BF_ENC(r,l,s,p[18]); | |
| 165 BF_ENC(l,r,s,p[17]); | |
| 166 #endif | |
| 167 BF_ENC(r,l,s,p[16]); | |
| 168 BF_ENC(l,r,s,p[15]); | |
| 169 BF_ENC(r,l,s,p[14]); | |
| 170 BF_ENC(l,r,s,p[13]); | |
| 171 BF_ENC(r,l,s,p[12]); | |
| 172 BF_ENC(l,r,s,p[11]); | |
| 173 BF_ENC(r,l,s,p[10]); | |
| 174 BF_ENC(l,r,s,p[ 9]); | |
| 175 BF_ENC(r,l,s,p[ 8]); | |
| 176 BF_ENC(l,r,s,p[ 7]); | |
| 177 BF_ENC(r,l,s,p[ 6]); | |
| 178 BF_ENC(l,r,s,p[ 5]); | |
| 179 BF_ENC(r,l,s,p[ 4]); | |
| 180 BF_ENC(l,r,s,p[ 3]); | |
| 181 BF_ENC(r,l,s,p[ 2]); | |
| 182 BF_ENC(l,r,s,p[ 1]); | |
| 183 r^=p[0]; | |
| 184 | |
| 185 data[1]=l&0xffffffffL; | |
| 186 data[0]=r&0xffffffffL; | |
| 187 #else | |
| 188 register BF_LONG l,r,t,*k; | |
| 189 | |
| 190 l=data[0]; | |
| 191 r=data[1]; | |
| 192 k=(BF_LONG *)key; | |
| 193 | |
| 194 l^=k[BF_ROUNDS+1]; | |
| 195 #if BF_ROUNDS == 20 | |
| 196 BF_ENC(r,l,k,20); | |
| 197 BF_ENC(l,r,k,19); | |
| 198 BF_ENC(r,l,k,18); | |
| 199 BF_ENC(l,r,k,17); | |
| 200 #endif | |
| 201 BF_ENC(r,l,k,16); | |
| 202 BF_ENC(l,r,k,15); | |
| 203 BF_ENC(r,l,k,14); | |
| 204 BF_ENC(l,r,k,13); | |
| 205 BF_ENC(r,l,k,12); | |
| 206 BF_ENC(l,r,k,11); | |
| 207 BF_ENC(r,l,k,10); | |
| 208 BF_ENC(l,r,k, 9); | |
| 209 BF_ENC(r,l,k, 8); | |
| 210 BF_ENC(l,r,k, 7); | |
| 211 BF_ENC(r,l,k, 6); | |
| 212 BF_ENC(l,r,k, 5); | |
| 213 BF_ENC(r,l,k, 4); | |
| 214 BF_ENC(l,r,k, 3); | |
| 215 BF_ENC(r,l,k, 2); | |
| 216 BF_ENC(l,r,k, 1); | |
| 217 r^=k[0]; | |
| 218 | |
| 219 data[1]=l&0xffffffffL; | |
| 220 data[0]=r&0xffffffffL; | |
| 221 #endif | |
| 222 } | |
| 223 | |
| 224 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, | |
| 225 const BF_KEY *schedule, unsigned char *ivec, int encrypt) | |
| 226 { | |
| 227 register BF_LONG tin0,tin1; | |
| 228 register BF_LONG tout0,tout1,xor0,xor1; | |
| 229 register long l=length; | |
| 230 BF_LONG tin[2]; | |
| 231 | |
| 232 if (encrypt) | |
| 233 { | |
| 234 n2l(ivec,tout0); | |
| 235 n2l(ivec,tout1); | |
| 236 ivec-=8; | |
| 237 for (l-=8; l>=0; l-=8) | |
| 238 { | |
| 239 n2l(in,tin0); | |
| 240 n2l(in,tin1); | |
| 241 tin0^=tout0; | |
| 242 tin1^=tout1; | |
| 243 tin[0]=tin0; | |
| 244 tin[1]=tin1; | |
| 245 BF_encrypt(tin,schedule); | |
| 246 tout0=tin[0]; | |
| 247 tout1=tin[1]; | |
| 248 l2n(tout0,out); | |
| 249 l2n(tout1,out); | |
| 250 } | |
| 251 if (l != -8) | |
| 252 { | |
| 253 n2ln(in,tin0,tin1,l+8); | |
| 254 tin0^=tout0; | |
| 255 tin1^=tout1; | |
| 256 tin[0]=tin0; | |
| 257 tin[1]=tin1; | |
| 258 BF_encrypt(tin,schedule); | |
| 259 tout0=tin[0]; | |
| 260 tout1=tin[1]; | |
| 261 l2n(tout0,out); | |
| 262 l2n(tout1,out); | |
| 263 } | |
| 264 l2n(tout0,ivec); | |
| 265 l2n(tout1,ivec); | |
| 266 } | |
| 267 else | |
| 268 { | |
| 269 n2l(ivec,xor0); | |
| 270 n2l(ivec,xor1); | |
| 271 ivec-=8; | |
| 272 for (l-=8; l>=0; l-=8) | |
| 273 { | |
| 274 n2l(in,tin0); | |
| 275 n2l(in,tin1); | |
| 276 tin[0]=tin0; | |
| 277 tin[1]=tin1; | |
| 278 BF_decrypt(tin,schedule); | |
| 279 tout0=tin[0]^xor0; | |
| 280 tout1=tin[1]^xor1; | |
| 281 l2n(tout0,out); | |
| 282 l2n(tout1,out); | |
| 283 xor0=tin0; | |
| 284 xor1=tin1; | |
| 285 } | |
| 286 if (l != -8) | |
| 287 { | |
| 288 n2l(in,tin0); | |
| 289 n2l(in,tin1); | |
| 290 tin[0]=tin0; | |
| 291 tin[1]=tin1; | |
| 292 BF_decrypt(tin,schedule); | |
| 293 tout0=tin[0]^xor0; | |
| 294 tout1=tin[1]^xor1; | |
| 295 l2nn(tout0,tout1,out,l+8); | |
| 296 xor0=tin0; | |
| 297 xor1=tin1; | |
| 298 } | |
| 299 l2n(xor0,ivec); | |
| 300 l2n(xor1,ivec); | |
| 301 } | |
| 302 tin0=tin1=tout0=tout1=xor0=xor1=0; | |
| 303 tin[0]=tin[1]=0; | |
| 304 } | |
| 305 | |
| 306 #endif | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master