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| 1 /* crypto/rc2/rc2_cbc.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/rc2.h> | |
| 60 #include "rc2_locl.h" | |
| 61 | |
| 62 void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, | |
| 63 RC2_KEY *ks, unsigned char *iv, int encrypt) | |
| 64 { | |
| 65 register unsigned long tin0,tin1; | |
| 66 register unsigned long tout0,tout1,xor0,xor1; | |
| 67 register long l=length; | |
| 68 unsigned long tin[2]; | |
| 69 | |
| 70 if (encrypt) | |
| 71 { | |
| 72 c2l(iv,tout0); | |
| 73 c2l(iv,tout1); | |
| 74 iv-=8; | |
| 75 for (l-=8; l>=0; l-=8) | |
| 76 { | |
| 77 c2l(in,tin0); | |
| 78 c2l(in,tin1); | |
| 79 tin0^=tout0; | |
| 80 tin1^=tout1; | |
| 81 tin[0]=tin0; | |
| 82 tin[1]=tin1; | |
| 83 RC2_encrypt(tin,ks); | |
| 84 tout0=tin[0]; l2c(tout0,out); | |
| 85 tout1=tin[1]; l2c(tout1,out); | |
| 86 } | |
| 87 if (l != -8) | |
| 88 { | |
| 89 c2ln(in,tin0,tin1,l+8); | |
| 90 tin0^=tout0; | |
| 91 tin1^=tout1; | |
| 92 tin[0]=tin0; | |
| 93 tin[1]=tin1; | |
| 94 RC2_encrypt(tin,ks); | |
| 95 tout0=tin[0]; l2c(tout0,out); | |
| 96 tout1=tin[1]; l2c(tout1,out); | |
| 97 } | |
| 98 l2c(tout0,iv); | |
| 99 l2c(tout1,iv); | |
| 100 } | |
| 101 else | |
| 102 { | |
| 103 c2l(iv,xor0); | |
| 104 c2l(iv,xor1); | |
| 105 iv-=8; | |
| 106 for (l-=8; l>=0; l-=8) | |
| 107 { | |
| 108 c2l(in,tin0); tin[0]=tin0; | |
| 109 c2l(in,tin1); tin[1]=tin1; | |
| 110 RC2_decrypt(tin,ks); | |
| 111 tout0=tin[0]^xor0; | |
| 112 tout1=tin[1]^xor1; | |
| 113 l2c(tout0,out); | |
| 114 l2c(tout1,out); | |
| 115 xor0=tin0; | |
| 116 xor1=tin1; | |
| 117 } | |
| 118 if (l != -8) | |
| 119 { | |
| 120 c2l(in,tin0); tin[0]=tin0; | |
| 121 c2l(in,tin1); tin[1]=tin1; | |
| 122 RC2_decrypt(tin,ks); | |
| 123 tout0=tin[0]^xor0; | |
| 124 tout1=tin[1]^xor1; | |
| 125 l2cn(tout0,tout1,out,l+8); | |
| 126 xor0=tin0; | |
| 127 xor1=tin1; | |
| 128 } | |
| 129 l2c(xor0,iv); | |
| 130 l2c(xor1,iv); | |
| 131 } | |
| 132 tin0=tin1=tout0=tout1=xor0=xor1=0; | |
| 133 tin[0]=tin[1]=0; | |
| 134 } | |
| 135 | |
| 136 void RC2_encrypt(unsigned long *d, RC2_KEY *key) | |
| 137 { | |
| 138 int i,n; | |
| 139 register RC2_INT *p0,*p1; | |
| 140 register RC2_INT x0,x1,x2,x3,t; | |
| 141 unsigned long l; | |
| 142 | |
| 143 l=d[0]; | |
| 144 x0=(RC2_INT)l&0xffff; | |
| 145 x1=(RC2_INT)(l>>16L); | |
| 146 l=d[1]; | |
| 147 x2=(RC2_INT)l&0xffff; | |
| 148 x3=(RC2_INT)(l>>16L); | |
| 149 | |
| 150 n=3; | |
| 151 i=5; | |
| 152 | |
| 153 p0=p1= &(key->data[0]); | |
| 154 for (;;) | |
| 155 { | |
| 156 t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; | |
| 157 x0=(t<<1)|(t>>15); | |
| 158 t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; | |
| 159 x1=(t<<2)|(t>>14); | |
| 160 t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; | |
| 161 x2=(t<<3)|(t>>13); | |
| 162 t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; | |
| 163 x3=(t<<5)|(t>>11); | |
| 164 | |
| 165 if (--i == 0) | |
| 166 { | |
| 167 if (--n == 0) break; | |
| 168 i=(n == 2)?6:5; | |
| 169 | |
| 170 x0+=p1[x3&0x3f]; | |
| 171 x1+=p1[x0&0x3f]; | |
| 172 x2+=p1[x1&0x3f]; | |
| 173 x3+=p1[x2&0x3f]; | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L); | |
| 178 d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L); | |
| 179 } | |
| 180 | |
| 181 void RC2_decrypt(unsigned long *d, RC2_KEY *key) | |
| 182 { | |
| 183 int i,n; | |
| 184 register RC2_INT *p0,*p1; | |
| 185 register RC2_INT x0,x1,x2,x3,t; | |
| 186 unsigned long l; | |
| 187 | |
| 188 l=d[0]; | |
| 189 x0=(RC2_INT)l&0xffff; | |
| 190 x1=(RC2_INT)(l>>16L); | |
| 191 l=d[1]; | |
| 192 x2=(RC2_INT)l&0xffff; | |
| 193 x3=(RC2_INT)(l>>16L); | |
| 194 | |
| 195 n=3; | |
| 196 i=5; | |
| 197 | |
| 198 p0= &(key->data[63]); | |
| 199 p1= &(key->data[0]); | |
| 200 for (;;) | |
| 201 { | |
| 202 t=((x3<<11)|(x3>>5))&0xffff; | |
| 203 x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff; | |
| 204 t=((x2<<13)|(x2>>3))&0xffff; | |
| 205 x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff; | |
| 206 t=((x1<<14)|(x1>>2))&0xffff; | |
| 207 x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff; | |
| 208 t=((x0<<15)|(x0>>1))&0xffff; | |
| 209 x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff; | |
| 210 | |
| 211 if (--i == 0) | |
| 212 { | |
| 213 if (--n == 0) break; | |
| 214 i=(n == 2)?6:5; | |
| 215 | |
| 216 x3=(x3-p1[x2&0x3f])&0xffff; | |
| 217 x2=(x2-p1[x1&0x3f])&0xffff; | |
| 218 x1=(x1-p1[x0&0x3f])&0xffff; | |
| 219 x0=(x0-p1[x3&0x3f])&0xffff; | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L); | |
| 224 d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L); | |
| 225 } | |
| 226 | |
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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