1 /* $OpenBSD: e_des3.c,v 1.16 2014/07/11 08:44:48 jsing Exp $ */ 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 <stdio.h> 60 #include <string.h> 61 62 #include <openssl/opensslconf.h> 63 64 #ifndef OPENSSL_NO_DES 65 66 #include <openssl/des.h> 67 #include <openssl/evp.h> 68 #include <openssl/objects.h> 69 #include <openssl/rand.h> 70 71 #include "evp_locl.h" 72 73 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 74 const unsigned char *iv, int enc); 75 76 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 77 const unsigned char *iv, int enc); 78 79 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 80 81 typedef struct { 82 DES_key_schedule ks1;/* key schedule */ 83 DES_key_schedule ks2;/* key schedule (for ede) */ 84 DES_key_schedule ks3;/* key schedule (for ede3) */ 85 } DES_EDE_KEY; 86 87 #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 88 89 /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ 90 91 static int 92 des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 93 const unsigned char *in, size_t inl) 94 { 95 BLOCK_CIPHER_ecb_loop() 96 DES_ecb3_encrypt((const_DES_cblock *)(in + i), (DES_cblock *)(out + i), 97 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, ctx->encrypt); 98 return 1; 99 } 100 101 static int 102 des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 103 const unsigned char *in, size_t inl) 104 { 105 while (inl >= EVP_MAXCHUNK) { 106 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 107 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 108 (DES_cblock *)ctx->iv, &ctx->num); 109 inl -= EVP_MAXCHUNK; 110 in += EVP_MAXCHUNK; 111 out += EVP_MAXCHUNK; 112 } 113 if (inl) 114 DES_ede3_ofb64_encrypt(in, out, (long)inl, 115 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 116 (DES_cblock *)ctx->iv, &ctx->num); 117 118 return 1; 119 } 120 121 static int 122 des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 123 const unsigned char *in, size_t inl) 124 { 125 while (inl >= EVP_MAXCHUNK) { 126 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 127 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 128 (DES_cblock *)ctx->iv, ctx->encrypt); 129 inl -= EVP_MAXCHUNK; 130 in += EVP_MAXCHUNK; 131 out += EVP_MAXCHUNK; 132 } 133 if (inl) 134 DES_ede3_cbc_encrypt(in, out, (long)inl, 135 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 136 (DES_cblock *)ctx->iv, ctx->encrypt); 137 return 1; 138 } 139 140 static int 141 des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 142 const unsigned char *in, size_t inl) 143 { 144 while (inl >= EVP_MAXCHUNK) { 145 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 146 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 147 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 148 inl -= EVP_MAXCHUNK; 149 in += EVP_MAXCHUNK; 150 out += EVP_MAXCHUNK; 151 } 152 if (inl) 153 DES_ede3_cfb64_encrypt(in, out, (long)inl, 154 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 155 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 156 return 1; 157 } 158 159 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right 160 way, so wrap it here */ 161 static int 162 des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 163 const unsigned char *in, size_t inl) 164 { 165 size_t n; 166 unsigned char c[1], d[1]; 167 168 for (n = 0; n < inl; ++n) { 169 c[0] = (in[n/8]&(1 << (7 - n % 8))) ? 0x80 : 0; 170 DES_ede3_cfb_encrypt(c, d, 1, 1, 171 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 172 (DES_cblock *)ctx->iv, ctx->encrypt); 173 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | 174 ((d[0] & 0x80) >> (unsigned int)(n % 8)); 175 } 176 177 return 1; 178 } 179 180 static int 181 des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 182 const unsigned char *in, size_t inl) 183 { 184 while (inl >= EVP_MAXCHUNK) { 185 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 186 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 187 (DES_cblock *)ctx->iv, ctx->encrypt); 188 inl -= EVP_MAXCHUNK; 189 in += EVP_MAXCHUNK; 190 out += EVP_MAXCHUNK; 191 } 192 if (inl) 193 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 194 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 195 (DES_cblock *)ctx->iv, ctx->encrypt); 196 return 1; 197 } 198 199 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 200 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 201 EVP_CIPHER_set_asn1_iv, 202 EVP_CIPHER_get_asn1_iv, 203 des3_ctrl) 204 205 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher 206 #define des_ede3_ofb_cipher des_ede_ofb_cipher 207 #define des_ede3_cbc_cipher des_ede_cbc_cipher 208 #define des_ede3_ecb_cipher des_ede_ecb_cipher 209 210 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 211 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 212 EVP_CIPHER_set_asn1_iv, 213 EVP_CIPHER_get_asn1_iv, 214 des3_ctrl) 215 216 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 217 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 218 EVP_CIPHER_set_asn1_iv, 219 EVP_CIPHER_get_asn1_iv, 220 des3_ctrl) 221 222 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 223 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 224 EVP_CIPHER_set_asn1_iv, 225 EVP_CIPHER_get_asn1_iv, 226 des3_ctrl) 227 228 static int 229 des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 230 const unsigned char *iv, int enc) 231 { 232 DES_cblock *deskey = (DES_cblock *)key; 233 234 #ifdef EVP_CHECK_DES_KEY 235 if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1) 236 !! DES_set_key_checked(&deskey[1], &data(ctx)->ks2)) 237 return 0; 238 #else 239 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 240 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 241 #endif 242 memcpy(&data(ctx)->ks3, &data(ctx)->ks1, 243 sizeof(data(ctx)->ks1)); 244 return 1; 245 } 246 247 static int 248 des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 249 const unsigned char *iv, int enc) 250 { 251 DES_cblock *deskey = (DES_cblock *)key; 252 253 254 #ifdef EVP_CHECK_DES_KEY 255 if (DES_set_key_checked(&deskey[0], &data(ctx)->ks1) || 256 DES_set_key_checked(&deskey[1], &data(ctx)->ks2) || 257 DES_set_key_checked(&deskey[2], &data(ctx)->ks3)) 258 return 0; 259 #else 260 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 261 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 262 DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3); 263 #endif 264 return 1; 265 } 266 267 static int 268 des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 269 { 270 DES_cblock *deskey = ptr; 271 272 switch (type) { 273 case EVP_CTRL_RAND_KEY: 274 if (RAND_bytes(ptr, c->key_len) <= 0) 275 return 0; 276 DES_set_odd_parity(deskey); 277 if (c->key_len >= 16) 278 DES_set_odd_parity(deskey + 1); 279 if (c->key_len >= 24) 280 DES_set_odd_parity(deskey + 2); 281 return 1; 282 283 default: 284 return -1; 285 } 286 } 287 288 const EVP_CIPHER * 289 EVP_des_ede(void) 290 { 291 return &des_ede_ecb; 292 } 293 294 const EVP_CIPHER * 295 EVP_des_ede3(void) 296 { 297 return &des_ede3_ecb; 298 } 299 #endif 300