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| 1 /* crypto/des/cfb64ede.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 #include "e_os.h" | |
| 61 | |
| 62 /* The input and output encrypted as though 64bit cfb mode is being | |
| 63 * used. The extra state information to record how much of the | |
| 64 * 64bit block we have used is contained in *num; | |
| 65 */ | |
| 66 | |
| 67 void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, | |
| 68 long length, DES_key_schedule *ks1, | |
| 69 DES_key_schedule *ks2, DES_key_schedule *ks3, | |
| 70 DES_cblock *ivec, int *num, int enc) | |
| 71 { | |
| 72 register DES_LONG v0,v1; | |
| 73 register long l=length; | |
| 74 register int n= *num; | |
| 75 DES_LONG ti[2]; | |
| 76 unsigned char *iv,c,cc; | |
| 77 | |
| 78 iv=&(*ivec)[0]; | |
| 79 if (enc) | |
| 80 { | |
| 81 while (l--) | |
| 82 { | |
| 83 if (n == 0) | |
| 84 { | |
| 85 c2l(iv,v0); | |
| 86 c2l(iv,v1); | |
| 87 | |
| 88 ti[0]=v0; | |
| 89 ti[1]=v1; | |
| 90 DES_encrypt3(ti,ks1,ks2,ks3); | |
| 91 v0=ti[0]; | |
| 92 v1=ti[1]; | |
| 93 | |
| 94 iv = &(*ivec)[0]; | |
| 95 l2c(v0,iv); | |
| 96 l2c(v1,iv); | |
| 97 iv = &(*ivec)[0]; | |
| 98 } | |
| 99 c= *(in++)^iv[n]; | |
| 100 *(out++)=c; | |
| 101 iv[n]=c; | |
| 102 n=(n+1)&0x07; | |
| 103 } | |
| 104 } | |
| 105 else | |
| 106 { | |
| 107 while (l--) | |
| 108 { | |
| 109 if (n == 0) | |
| 110 { | |
| 111 c2l(iv,v0); | |
| 112 c2l(iv,v1); | |
| 113 | |
| 114 ti[0]=v0; | |
| 115 ti[1]=v1; | |
| 116 DES_encrypt3(ti,ks1,ks2,ks3); | |
| 117 v0=ti[0]; | |
| 118 v1=ti[1]; | |
| 119 | |
| 120 iv = &(*ivec)[0]; | |
| 121 l2c(v0,iv); | |
| 122 l2c(v1,iv); | |
| 123 iv = &(*ivec)[0]; | |
| 124 } | |
| 125 cc= *(in++); | |
| 126 c=iv[n]; | |
| 127 iv[n]=cc; | |
| 128 *(out++)=c^cc; | |
| 129 n=(n+1)&0x07; | |
| 130 } | |
| 131 } | |
| 132 v0=v1=ti[0]=ti[1]=c=cc=0; | |
| 133 *num=n; | |
| 134 } | |
| 135 | |
| 136 #ifdef undef /* MACRO */ | |
| 137 void DES_ede2_cfb64_encrypt(unsigned char *in, unsigned char *out, long length, | |
| 138 DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock (*ivec), | |
| 139 int *num, int enc) | |
| 140 { | |
| 141 DES_ede3_cfb64_encrypt(in,out,length,ks1,ks2,ks1,ivec,num,enc); | |
| 142 } | |
| 143 #endif | |
| 144 | |
| 145 /* This is compatible with the single key CFB-r for DES, even thought that's | |
| 146 * not what EVP needs. | |
| 147 */ | |
| 148 | |
| 149 void DES_ede3_cfb_encrypt(const unsigned char *in,unsigned char *out, | |
| 150 int numbits,long length,DES_key_schedule *ks1, | |
| 151 DES_key_schedule *ks2,DES_key_schedule *ks3, | |
| 152 DES_cblock *ivec,int enc) | |
| 153 { | |
| 154 register DES_LONG d0,d1,v0,v1; | |
| 155 register unsigned long l=length,n=((unsigned int)numbits+7)/8; | |
| 156 register int num=numbits,i; | |
| 157 DES_LONG ti[2]; | |
| 158 unsigned char *iv; | |
| 159 unsigned char ovec[16]; | |
| 160 | |
| 161 if (num > 64) return; | |
| 162 iv = &(*ivec)[0]; | |
| 163 c2l(iv,v0); | |
| 164 c2l(iv,v1); | |
| 165 if (enc) | |
| 166 { | |
| 167 while (l >= n) | |
| 168 { | |
| 169 l-=n; | |
| 170 ti[0]=v0; | |
| 171 ti[1]=v1; | |
| 172 DES_encrypt3(ti,ks1,ks2,ks3); | |
| 173 c2ln(in,d0,d1,n); | |
| 174 in+=n; | |
| 175 d0^=ti[0]; | |
| 176 d1^=ti[1]; | |
| 177 l2cn(d0,d1,out,n); | |
| 178 out+=n; | |
| 179 /* 30-08-94 - eay - changed because l>>32 and | |
| 180 * l<<32 are bad under gcc :-( */ | |
| 181 if (num == 32) | |
| 182 { v0=v1; v1=d0; } | |
| 183 else if (num == 64) | |
| 184 { v0=d0; v1=d1; } | |
| 185 else | |
| 186 { | |
| 187 iv=&ovec[0]; | |
| 188 l2c(v0,iv); | |
| 189 l2c(v1,iv); | |
| 190 l2c(d0,iv); | |
| 191 l2c(d1,iv); | |
| 192 /* shift ovec left most of the bits... */ | |
| 193 memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); | |
| 194 /* now the remaining bits */ | |
| 195 if(num%8 != 0) | |
| 196 for(i=0 ; i < 8 ; ++i) | |
| 197 { | |
| 198 ovec[i]<<=num%8; | |
| 199 ovec[i]|=ovec[i+1]>>(8-num%8); | |
| 200 } | |
| 201 iv=&ovec[0]; | |
| 202 c2l(iv,v0); | |
| 203 c2l(iv,v1); | |
| 204 } | |
| 205 } | |
| 206 } | |
| 207 else | |
| 208 { | |
| 209 while (l >= n) | |
| 210 { | |
| 211 l-=n; | |
| 212 ti[0]=v0; | |
| 213 ti[1]=v1; | |
| 214 DES_encrypt3(ti,ks1,ks2,ks3); | |
| 215 c2ln(in,d0,d1,n); | |
| 216 in+=n; | |
| 217 /* 30-08-94 - eay - changed because l>>32 and | |
| 218 * l<<32 are bad under gcc :-( */ | |
| 219 if (num == 32) | |
| 220 { v0=v1; v1=d0; } | |
| 221 else if (num == 64) | |
| 222 { v0=d0; v1=d1; } | |
| 223 else | |
| 224 { | |
| 225 iv=&ovec[0]; | |
| 226 l2c(v0,iv); | |
| 227 l2c(v1,iv); | |
| 228 l2c(d0,iv); | |
| 229 l2c(d1,iv); | |
| 230 /* shift ovec left most of the bits... */ | |
| 231 memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); | |
| 232 /* now the remaining bits */ | |
| 233 if(num%8 != 0) | |
| 234 for(i=0 ; i < 8 ; ++i) | |
| 235 { | |
| 236 ovec[i]<<=num%8; | |
| 237 ovec[i]|=ovec[i+1]>>(8-num%8); | |
| 238 } | |
| 239 iv=&ovec[0]; | |
| 240 c2l(iv,v0); | |
| 241 c2l(iv,v1); | |
| 242 } | |
| 243 d0^=ti[0]; | |
| 244 d1^=ti[1]; | |
| 245 l2cn(d0,d1,out,n); | |
| 246 out+=n; | |
| 247 } | |
| 248 } | |
| 249 iv = &(*ivec)[0]; | |
| 250 l2c(v0,iv); | |
| 251 l2c(v1,iv); | |
| 252 v0=v1=d0=d1=ti[0]=ti[1]=0; | |
| 253 } | |
| 254 | |
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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