1 /* $OpenBSD: e_des3.c,v 1.20 2019/05/14 15:40:44 beck 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 70 #include "evp_locl.h" 71 72 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 73 const unsigned char *iv, int enc); 74 75 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 76 const unsigned char *iv, int enc); 77 78 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 79 80 typedef struct { 81 DES_key_schedule ks1;/* key schedule */ 82 DES_key_schedule ks2;/* key schedule (for ede) */ 83 DES_key_schedule ks3;/* key schedule (for ede3) */ 84 } DES_EDE_KEY; 85 86 #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 87 88 /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ 89 90 static int 91 des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 92 const unsigned char *in, size_t inl) 93 { 94 BLOCK_CIPHER_ecb_loop() 95 DES_ecb3_encrypt((const_DES_cblock *)(in + i), (DES_cblock *)(out + i), 96 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, ctx->encrypt); 97 return 1; 98 } 99 100 static int 101 des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 102 const unsigned char *in, size_t inl) 103 { 104 while (inl >= EVP_MAXCHUNK) { 105 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 106 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 107 (DES_cblock *)ctx->iv, &ctx->num); 108 inl -= EVP_MAXCHUNK; 109 in += EVP_MAXCHUNK; 110 out += EVP_MAXCHUNK; 111 } 112 if (inl) 113 DES_ede3_ofb64_encrypt(in, out, (long)inl, 114 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 115 (DES_cblock *)ctx->iv, &ctx->num); 116 117 return 1; 118 } 119 120 static int 121 des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 122 const unsigned char *in, size_t inl) 123 { 124 while (inl >= EVP_MAXCHUNK) { 125 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 126 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 127 (DES_cblock *)ctx->iv, ctx->encrypt); 128 inl -= EVP_MAXCHUNK; 129 in += EVP_MAXCHUNK; 130 out += EVP_MAXCHUNK; 131 } 132 if (inl) 133 DES_ede3_cbc_encrypt(in, out, (long)inl, 134 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 135 (DES_cblock *)ctx->iv, ctx->encrypt); 136 return 1; 137 } 138 139 static int 140 des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 141 const unsigned char *in, size_t inl) 142 { 143 while (inl >= EVP_MAXCHUNK) { 144 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 145 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 146 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 147 inl -= EVP_MAXCHUNK; 148 in += EVP_MAXCHUNK; 149 out += EVP_MAXCHUNK; 150 } 151 if (inl) 152 DES_ede3_cfb64_encrypt(in, out, (long)inl, 153 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 154 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 155 return 1; 156 } 157 158 /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right 159 way, so wrap it here */ 160 static int 161 des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 162 const unsigned char *in, size_t inl) 163 { 164 size_t n; 165 unsigned char c[1], d[1]; 166 if (!(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS)) 167 inl *= 8; 168 169 for (n = 0; n < inl; ++n) { 170 c[0] = (in[n/8]&(1 << (7 - n % 8))) ? 0x80 : 0; 171 DES_ede3_cfb_encrypt(c, d, 1, 1, 172 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 173 (DES_cblock *)ctx->iv, ctx->encrypt); 174 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | 175 ((d[0] & 0x80) >> (unsigned int)(n % 8)); 176 } 177 178 return 1; 179 } 180 181 static int 182 des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 183 const unsigned char *in, size_t inl) 184 { 185 while (inl >= EVP_MAXCHUNK) { 186 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 187 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 188 (DES_cblock *)ctx->iv, ctx->encrypt); 189 inl -= EVP_MAXCHUNK; 190 in += EVP_MAXCHUNK; 191 out += EVP_MAXCHUNK; 192 } 193 if (inl) 194 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 195 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, 196 (DES_cblock *)ctx->iv, ctx->encrypt); 197 return 1; 198 } 199 200 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 201 EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 202 EVP_CIPHER_set_asn1_iv, 203 EVP_CIPHER_get_asn1_iv, 204 des3_ctrl) 205 206 #define des_ede3_cfb64_cipher des_ede_cfb64_cipher 207 #define des_ede3_ofb_cipher des_ede_ofb_cipher 208 #define des_ede3_cbc_cipher des_ede_cbc_cipher 209 #define des_ede3_ecb_cipher des_ede_ecb_cipher 210 211 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 212 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 213 EVP_CIPHER_set_asn1_iv, 214 EVP_CIPHER_get_asn1_iv, 215 des3_ctrl) 216 217 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 218 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 219 EVP_CIPHER_set_asn1_iv, 220 EVP_CIPHER_get_asn1_iv, 221 des3_ctrl) 222 223 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 224 EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 225 EVP_CIPHER_set_asn1_iv, 226 EVP_CIPHER_get_asn1_iv, 227 des3_ctrl) 228 229 static int 230 des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 231 const unsigned char *iv, int enc) 232 { 233 DES_cblock *deskey = (DES_cblock *)key; 234 235 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 236 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 237 memcpy(&data(ctx)->ks3, &data(ctx)->ks1, 238 sizeof(data(ctx)->ks1)); 239 return 1; 240 } 241 242 static int 243 des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 244 const unsigned char *iv, int enc) 245 { 246 DES_cblock *deskey = (DES_cblock *)key; 247 248 249 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); 250 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); 251 DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3); 252 return 1; 253 } 254 255 static int 256 des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 257 { 258 DES_cblock *deskey = ptr; 259 260 switch (type) { 261 case EVP_CTRL_RAND_KEY: 262 if (DES_random_key(deskey) == 0) 263 return 0; 264 if (c->key_len >= 16 && DES_random_key(deskey + 1) == 0) 265 return 0; 266 if (c->key_len >= 24 && DES_random_key(deskey + 2) == 0) 267 return 0; 268 return 1; 269 270 default: 271 return -1; 272 } 273 } 274 275 const EVP_CIPHER * 276 EVP_des_ede(void) 277 { 278 return &des_ede_ecb; 279 } 280 281 const EVP_CIPHER * 282 EVP_des_ede3(void) 283 { 284 return &des_ede3_ecb; 285 } 286 #endif 287