1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <string.h> 58 59 #include <openssl/des.h> 60 61 #include "../crypto/des/internal.h" 62 63 64 /* The input and output encrypted as though 64bit cfb mode is being used. The 65 * extra state information to record how much of the 64bit block we have used 66 * is contained in *num; */ 67 void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *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 uint32_t v0, v1; 72 long l = length; 73 int n = *num; 74 uint32_t ti[2]; 75 uint8_t *iv, c, cc; 76 77 iv = ivec->bytes; 78 if (enc) { 79 while (l--) { 80 if (n == 0) { 81 c2l(iv, v0); 82 c2l(iv, v1); 83 84 ti[0] = v0; 85 ti[1] = v1; 86 DES_encrypt3(ti, ks1, ks2, ks3); 87 v0 = ti[0]; 88 v1 = ti[1]; 89 90 iv = ivec->bytes; 91 l2c(v0, iv); 92 l2c(v1, iv); 93 iv = ivec->bytes; 94 } 95 c = *(in++) ^ iv[n]; 96 *(out++) = c; 97 iv[n] = c; 98 n = (n + 1) & 0x07; 99 } 100 } else { 101 while (l--) { 102 if (n == 0) { 103 c2l(iv, v0); 104 c2l(iv, v1); 105 106 ti[0] = v0; 107 ti[1] = v1; 108 DES_encrypt3(ti, ks1, ks2, ks3); 109 v0 = ti[0]; 110 v1 = ti[1]; 111 112 iv = ivec->bytes; 113 l2c(v0, iv); 114 l2c(v1, iv); 115 iv = ivec->bytes; 116 } 117 cc = *(in++); 118 c = iv[n]; 119 iv[n] = cc; 120 *(out++) = c ^ cc; 121 n = (n + 1) & 0x07; 122 } 123 } 124 v0 = v1 = ti[0] = ti[1] = c = cc = 0; 125 *num = n; 126 } 127 128 /* This is compatible with the single key CFB-r for DES, even thought that's 129 * not what EVP needs. */ 130 131 void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out, int numbits, 132 long length, DES_key_schedule *ks1, 133 DES_key_schedule *ks2, DES_key_schedule *ks3, 134 DES_cblock *ivec, int enc) { 135 uint32_t d0, d1, v0, v1; 136 unsigned long l = length, n = ((unsigned int)numbits + 7) / 8; 137 int num = numbits, i; 138 uint32_t ti[2]; 139 uint8_t *iv; 140 uint8_t ovec[16]; 141 142 if (num > 64) { 143 return; 144 }; 145 146 iv = ivec->bytes; 147 c2l(iv, v0); 148 c2l(iv, v1); 149 150 if (enc) { 151 while (l >= n) { 152 l -= n; 153 ti[0] = v0; 154 ti[1] = v1; 155 DES_encrypt3(ti, ks1, ks2, ks3); 156 c2ln(in, d0, d1, n); 157 in += n; 158 d0 ^= ti[0]; 159 d1 ^= ti[1]; 160 l2cn(d0, d1, out, n); 161 out += n; 162 /* 30-08-94 - eay - changed because l>>32 and l<<32 are bad under 163 * gcc :-( */ 164 if (num == 32) { 165 v0 = v1; 166 v1 = d0; 167 } else if (num == 64) { 168 v0 = d0; 169 v1 = d1; 170 } else { 171 iv = &ovec[0]; 172 l2c(v0, iv); 173 l2c(v1, iv); 174 l2c(d0, iv); 175 l2c(d1, iv); 176 /* shift ovec left most of the bits... */ 177 memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); 178 /* now the remaining bits */ 179 if (num % 8 != 0) { 180 for (i = 0; i < 8; ++i) { 181 ovec[i] <<= num % 8; 182 ovec[i] |= ovec[i + 1] >> (8 - num % 8); 183 } 184 } 185 iv = &ovec[0]; 186 c2l(iv, v0); 187 c2l(iv, v1); 188 } 189 } 190 } else { 191 while (l >= n) { 192 l -= n; 193 ti[0] = v0; 194 ti[1] = v1; 195 DES_encrypt3(ti, ks1, ks2, ks3); 196 c2ln(in, d0, d1, n); 197 in += n; 198 /* 30-08-94 - eay - changed because l>>32 and l<<32 are bad under 199 * gcc :-( */ 200 if (num == 32) { 201 v0 = v1; 202 v1 = d0; 203 } else if (num == 64) { 204 v0 = d0; 205 v1 = d1; 206 } else { 207 iv = &ovec[0]; 208 l2c(v0, iv); 209 l2c(v1, iv); 210 l2c(d0, iv); 211 l2c(d1, iv); 212 /* shift ovec left most of the bits... */ 213 memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); 214 /* now the remaining bits */ 215 if (num % 8 != 0) { 216 for (i = 0; i < 8; ++i) { 217 ovec[i] <<= num % 8; 218 ovec[i] |= ovec[i + 1] >> (8 - num % 8); 219 } 220 } 221 iv = &ovec[0]; 222 c2l(iv, v0); 223 c2l(iv, v1); 224 } 225 d0 ^= ti[0]; 226 d1 ^= ti[1]; 227 l2cn(d0, d1, out, n); 228 out += n; 229 } 230 } 231 232 iv = ivec->bytes; 233 l2c(v0, iv); 234 l2c(v1, iv); 235 v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0; 236 } 237
