1 /* $OpenBSD: e_des.c,v 1.19 2022/09/15 07:04:19 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 <limits.h> 60 #include <stdio.h> 61 62 #include <openssl/opensslconf.h> 63 64 #ifndef OPENSSL_NO_DES 65 66 #include <openssl/evp.h> 67 #include <openssl/des.h> 68 #include <openssl/objects.h> 69 70 #include "evp_locl.h" 71 72 static int 73 des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 74 const unsigned char *iv, int enc) 75 { 76 DES_cblock *deskey = (DES_cblock *)key; 77 78 DES_set_key_unchecked(deskey, ctx->cipher_data); 79 return 1; 80 } 81 82 static int 83 des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 84 { 85 switch (type) { 86 case EVP_CTRL_RAND_KEY: 87 if (DES_random_key((DES_cblock *)ptr) == 0) 88 return 0; 89 return 1; 90 91 default: 92 return -1; 93 } 94 } 95 96 static int 97 des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 98 const unsigned char *in, size_t inl) 99 { 100 size_t i, bl; 101 102 bl = ctx->cipher->block_size; 103 104 if (inl < bl) 105 return 1; 106 107 inl -= bl; 108 109 for (i = 0; i <= inl; i += bl) 110 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), 111 ctx->cipher_data, ctx->encrypt); 112 113 return 1; 114 } 115 116 static int 117 des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 118 const unsigned char *in, size_t inl) 119 { 120 size_t chunk = LONG_MAX & ~0xff; 121 122 while (inl >= chunk) { 123 DES_ofb64_encrypt(in, out, (long)chunk, ctx->cipher_data, 124 (DES_cblock *)ctx->iv, &ctx->num); 125 inl -= chunk; 126 in += chunk; 127 out += chunk; 128 } 129 if (inl) 130 DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, 131 (DES_cblock *)ctx->iv, &ctx->num); 132 return 1; 133 } 134 135 static int 136 des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 137 const unsigned char *in, size_t inl) 138 { 139 size_t chunk = LONG_MAX & ~0xff; 140 141 while (inl >= chunk) { 142 DES_ncbc_encrypt(in, out, (long)chunk, ctx->cipher_data, 143 (DES_cblock *)ctx->iv, ctx->encrypt); 144 inl -= chunk; 145 in += chunk; 146 out += chunk; 147 } 148 if (inl) 149 DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, 150 (DES_cblock *)ctx->iv, ctx->encrypt); 151 return 1; 152 } 153 154 static int 155 des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 156 const unsigned char *in, size_t inl) 157 { 158 size_t chunk = LONG_MAX & ~0xff; 159 160 while (inl >= chunk) { 161 DES_cfb64_encrypt(in, out, (long)chunk, ctx->cipher_data, 162 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 163 inl -= chunk; 164 in += chunk; 165 out += chunk; 166 } 167 if (inl) 168 DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, 169 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); 170 return 1; 171 } 172 173 /* Although we have a CFB-r implementation for DES, it doesn't pack the right 174 way, so wrap it here */ 175 static int 176 des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 177 const unsigned char *in, size_t inl) 178 { 179 unsigned char c[1], d[1]; 180 size_t chunk = LONG_MAX / 8; 181 size_t n; 182 183 if (inl < chunk) 184 chunk = inl; 185 186 while (inl && inl >= chunk) { 187 for (n = 0; n < chunk*8; ++n) { 188 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 189 DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data, 190 (DES_cblock *)ctx->iv, ctx->encrypt); 191 out[n / 8] = (out[n / 8] & 192 ~(0x80 >> (unsigned int)(n % 8))) | 193 ((d[0] & 0x80) >> (unsigned int)(n % 8)); 194 } 195 inl -= chunk; 196 in += chunk; 197 out += chunk; 198 if (inl < chunk) 199 chunk = inl; 200 } 201 202 return 1; 203 } 204 205 static int 206 des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 207 const unsigned char *in, size_t inl) 208 { 209 size_t chunk = LONG_MAX & ~0xff; 210 211 while (inl >= chunk) { 212 DES_cfb_encrypt(in, out, 8, (long)chunk, 213 ctx->cipher_data, (DES_cblock *)ctx->iv, ctx->encrypt); 214 inl -= chunk; 215 in += chunk; 216 out += chunk; 217 } 218 if (inl) 219 DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data, 220 (DES_cblock *)ctx->iv, ctx->encrypt); 221 return 1; 222 } 223 224 static const EVP_CIPHER des_cbc = { 225 .nid = NID_des_cbc, 226 .block_size = 8, 227 .key_len = 8, 228 .iv_len = 8, 229 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CBC_MODE, 230 .init = des_init_key, 231 .do_cipher = des_cbc_cipher, 232 .cleanup = NULL, 233 .ctx_size = sizeof(DES_key_schedule), 234 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 235 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 236 .ctrl = des_ctrl, 237 .app_data = NULL, 238 }; 239 240 const EVP_CIPHER * 241 EVP_des_cbc(void) 242 { 243 return &des_cbc; 244 } 245 246 static const EVP_CIPHER des_cfb64 = { 247 .nid = NID_des_cfb64, 248 .block_size = 1, 249 .key_len = 8, 250 .iv_len = 8, 251 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE, 252 .init = des_init_key, 253 .do_cipher = des_cfb64_cipher, 254 .cleanup = NULL, 255 .ctx_size = sizeof(DES_key_schedule), 256 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 257 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 258 .ctrl = des_ctrl, 259 .app_data = NULL, 260 }; 261 262 const EVP_CIPHER * 263 EVP_des_cfb64(void) 264 { 265 return &des_cfb64; 266 } 267 268 static const EVP_CIPHER des_ofb = { 269 .nid = NID_des_ofb64, 270 .block_size = 1, 271 .key_len = 8, 272 .iv_len = 8, 273 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_OFB_MODE, 274 .init = des_init_key, 275 .do_cipher = des_ofb_cipher, 276 .cleanup = NULL, 277 .ctx_size = sizeof(DES_key_schedule), 278 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 279 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 280 .ctrl = des_ctrl, 281 .app_data = NULL, 282 }; 283 284 const EVP_CIPHER * 285 EVP_des_ofb(void) 286 { 287 return &des_ofb; 288 } 289 290 static const EVP_CIPHER des_ecb = { 291 .nid = NID_des_ecb, 292 .block_size = 8, 293 .key_len = 8, 294 .iv_len = 0, 295 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_ECB_MODE, 296 .init = des_init_key, 297 .do_cipher = des_ecb_cipher, 298 .cleanup = NULL, 299 .ctx_size = sizeof(DES_key_schedule), 300 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 301 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 302 .ctrl = des_ctrl, 303 .app_data = NULL, 304 }; 305 306 const EVP_CIPHER * 307 EVP_des_ecb(void) 308 { 309 return &des_ecb; 310 } 311 312 static const EVP_CIPHER des_cfb1 = { 313 .nid = NID_des_cfb1, 314 .block_size = 1, 315 .key_len = 8, 316 .iv_len = 8, 317 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE, 318 .init = des_init_key, 319 .do_cipher = des_cfb1_cipher, 320 .cleanup = NULL, 321 .ctx_size = sizeof(DES_key_schedule), 322 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 323 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 324 .ctrl = des_ctrl, 325 .app_data = NULL, 326 }; 327 328 const EVP_CIPHER * 329 EVP_des_cfb1(void) 330 { 331 return &des_cfb1; 332 } 333 334 static const EVP_CIPHER des_cfb8 = { 335 .nid = NID_des_cfb8, 336 .block_size = 1, 337 .key_len = 8, 338 .iv_len = 8, 339 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE, 340 .init = des_init_key, 341 .do_cipher = des_cfb8_cipher, 342 .cleanup = NULL, 343 .ctx_size = sizeof(DES_key_schedule), 344 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, 345 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, 346 .ctrl = des_ctrl, 347 .app_data = NULL, 348 }; 349 350 const EVP_CIPHER * 351 EVP_des_cfb8(void) 352 { 353 return &des_cfb8; 354 } 355 #endif 356