1 /* 2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 #ifndef OPENSSL_NO_DES 13 # include <openssl/evp.h> 14 # include <openssl/objects.h> 15 # include "internal/evp_int.h" 16 # include <openssl/des.h> 17 # include <openssl/rand.h> 18 # include "evp_locl.h" 19 20 typedef struct { 21 union { 22 double align; 23 DES_key_schedule ks[3]; 24 } ks; 25 union { 26 void (*cbc) (const void *, void *, size_t, 27 const DES_key_schedule *, unsigned char *); 28 } stream; 29 } DES_EDE_KEY; 30 # define ks1 ks.ks[0] 31 # define ks2 ks.ks[1] 32 # define ks3 ks.ks[2] 33 34 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) 35 /* ---------^^^ this is not a typo, just a way to detect that 36 * assembler support was in general requested... */ 37 # include "sparc_arch.h" 38 39 extern unsigned int OPENSSL_sparcv9cap_P[]; 40 41 # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) 42 43 void des_t4_key_expand(const void *key, DES_key_schedule *ks); 44 void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len, 45 const DES_key_schedule ks[3], unsigned char iv[8]); 46 void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len, 47 const DES_key_schedule ks[3], unsigned char iv[8]); 48 # endif 49 50 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 51 const unsigned char *iv, int enc); 52 53 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 54 const unsigned char *iv, int enc); 55 56 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 57 58 # define data(ctx) EVP_C_DATA(DES_EDE_KEY,ctx) 59 60 /* 61 * Because of various casts and different args can't use 62 * IMPLEMENT_BLOCK_CIPHER 63 */ 64 65 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 66 const unsigned char *in, size_t inl) 67 { 68 BLOCK_CIPHER_ecb_loop() 69 DES_ecb3_encrypt((const_DES_cblock *)(in + i), 70 (DES_cblock *)(out + i), 71 &data(ctx)->ks1, &data(ctx)->ks2, 72 &data(ctx)->ks3, EVP_CIPHER_CTX_encrypting(ctx)); 73 return 1; 74 } 75 76 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 77 const unsigned char *in, size_t inl) 78 { 79 while (inl >= EVP_MAXCHUNK) { 80 int num = EVP_CIPHER_CTX_num(ctx); 81 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 82 &data(ctx)->ks1, &data(ctx)->ks2, 83 &data(ctx)->ks3, 84 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 85 &num); 86 EVP_CIPHER_CTX_set_num(ctx, num); 87 inl -= EVP_MAXCHUNK; 88 in += EVP_MAXCHUNK; 89 out += EVP_MAXCHUNK; 90 } 91 if (inl) { 92 int num = EVP_CIPHER_CTX_num(ctx); 93 DES_ede3_ofb64_encrypt(in, out, (long)inl, 94 &data(ctx)->ks1, &data(ctx)->ks2, 95 &data(ctx)->ks3, 96 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 97 &num); 98 EVP_CIPHER_CTX_set_num(ctx, num); 99 } 100 return 1; 101 } 102 103 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 104 const unsigned char *in, size_t inl) 105 { 106 DES_EDE_KEY *dat = data(ctx); 107 108 if (dat->stream.cbc != NULL) { 109 (*dat->stream.cbc) (in, out, inl, dat->ks.ks, 110 EVP_CIPHER_CTX_iv_noconst(ctx)); 111 return 1; 112 } 113 114 while (inl >= EVP_MAXCHUNK) { 115 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 116 &dat->ks1, &dat->ks2, &dat->ks3, 117 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 118 EVP_CIPHER_CTX_encrypting(ctx)); 119 inl -= EVP_MAXCHUNK; 120 in += EVP_MAXCHUNK; 121 out += EVP_MAXCHUNK; 122 } 123 if (inl) 124 DES_ede3_cbc_encrypt(in, out, (long)inl, 125 &dat->ks1, &dat->ks2, &dat->ks3, 126 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 127 EVP_CIPHER_CTX_encrypting(ctx)); 128 return 1; 129 } 130 131 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 132 const unsigned char *in, size_t inl) 133 { 134 while (inl >= EVP_MAXCHUNK) { 135 int num = EVP_CIPHER_CTX_num(ctx); 136 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 137 &data(ctx)->ks1, &data(ctx)->ks2, 138 &data(ctx)->ks3, 139 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 140 &num, EVP_CIPHER_CTX_encrypting(ctx)); 141 EVP_CIPHER_CTX_set_num(ctx, num); 142 inl -= EVP_MAXCHUNK; 143 in += EVP_MAXCHUNK; 144 out += EVP_MAXCHUNK; 145 } 146 if (inl) { 147 int num = EVP_CIPHER_CTX_num(ctx); 148 DES_ede3_cfb64_encrypt(in, out, (long)inl, 149 &data(ctx)->ks1, &data(ctx)->ks2, 150 &data(ctx)->ks3, 151 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 152 &num, EVP_CIPHER_CTX_encrypting(ctx)); 153 EVP_CIPHER_CTX_set_num(ctx, num); 154 } 155 return 1; 156 } 157 158 /* 159 * Although we have a CFB-r implementation for 3-DES, it doesn't pack the 160 * right way, so wrap it here 161 */ 162 static int 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 if (!EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) 169 inl *= 8; 170 for (n = 0; n < inl; ++n) { 171 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 172 DES_ede3_cfb_encrypt(c, d, 1, 1, 173 &data(ctx)->ks1, &data(ctx)->ks2, 174 &data(ctx)->ks3, 175 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 176 EVP_CIPHER_CTX_encrypting(ctx)); 177 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) 178 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); 179 } 180 181 return 1; 182 } 183 184 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 185 const unsigned char *in, size_t inl) 186 { 187 while (inl >= EVP_MAXCHUNK) { 188 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 189 &data(ctx)->ks1, &data(ctx)->ks2, 190 &data(ctx)->ks3, 191 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 192 EVP_CIPHER_CTX_encrypting(ctx)); 193 inl -= EVP_MAXCHUNK; 194 in += EVP_MAXCHUNK; 195 out += EVP_MAXCHUNK; 196 } 197 if (inl) 198 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 199 &data(ctx)->ks1, &data(ctx)->ks2, 200 &data(ctx)->ks3, 201 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), 202 EVP_CIPHER_CTX_encrypting(ctx)); 203 return 1; 204 } 205 206 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 207 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 208 des_ede_init_key, NULL, NULL, NULL, des3_ctrl) 209 # define des_ede3_cfb64_cipher des_ede_cfb64_cipher 210 # define des_ede3_ofb_cipher des_ede_ofb_cipher 211 # define des_ede3_cbc_cipher des_ede_cbc_cipher 212 # define des_ede3_ecb_cipher des_ede_ecb_cipher 213 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 214 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 215 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl) 216 217 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 218 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 219 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl) 220 221 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 222 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 223 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl) 224 225 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 226 const unsigned char *iv, int enc) 227 { 228 DES_cblock *deskey = (DES_cblock *)key; 229 DES_EDE_KEY *dat = data(ctx); 230 231 dat->stream.cbc = NULL; 232 # if defined(SPARC_DES_CAPABLE) 233 if (SPARC_DES_CAPABLE) { 234 int mode = EVP_CIPHER_CTX_mode(ctx); 235 236 if (mode == EVP_CIPH_CBC_MODE) { 237 des_t4_key_expand(&deskey[0], &dat->ks1); 238 des_t4_key_expand(&deskey[1], &dat->ks2); 239 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 240 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 241 des_t4_ede3_cbc_decrypt; 242 return 1; 243 } 244 } 245 # endif 246 DES_set_key_unchecked(&deskey[0], &dat->ks1); 247 DES_set_key_unchecked(&deskey[1], &dat->ks2); 248 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 249 return 1; 250 } 251 252 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 253 const unsigned char *iv, int enc) 254 { 255 DES_cblock *deskey = (DES_cblock *)key; 256 DES_EDE_KEY *dat = data(ctx); 257 258 dat->stream.cbc = NULL; 259 # if defined(SPARC_DES_CAPABLE) 260 if (SPARC_DES_CAPABLE) { 261 int mode = EVP_CIPHER_CTX_mode(ctx); 262 263 if (mode == EVP_CIPH_CBC_MODE) { 264 des_t4_key_expand(&deskey[0], &dat->ks1); 265 des_t4_key_expand(&deskey[1], &dat->ks2); 266 des_t4_key_expand(&deskey[2], &dat->ks3); 267 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 268 des_t4_ede3_cbc_decrypt; 269 return 1; 270 } 271 } 272 # endif 273 DES_set_key_unchecked(&deskey[0], &dat->ks1); 274 DES_set_key_unchecked(&deskey[1], &dat->ks2); 275 DES_set_key_unchecked(&deskey[2], &dat->ks3); 276 return 1; 277 } 278 279 static int des3_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) 280 { 281 282 DES_cblock *deskey = ptr; 283 284 switch (type) { 285 case EVP_CTRL_RAND_KEY: 286 if (RAND_priv_bytes(ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) 287 return 0; 288 DES_set_odd_parity(deskey); 289 if (EVP_CIPHER_CTX_key_length(ctx) >= 16) 290 DES_set_odd_parity(deskey + 1); 291 if (EVP_CIPHER_CTX_key_length(ctx) >= 24) 292 DES_set_odd_parity(deskey + 2); 293 return 1; 294 295 default: 296 return -1; 297 } 298 } 299 300 const EVP_CIPHER *EVP_des_ede(void) 301 { 302 return &des_ede_ecb; 303 } 304 305 const EVP_CIPHER *EVP_des_ede3(void) 306 { 307 return &des_ede3_ecb; 308 } 309 310 311 # include <openssl/sha.h> 312 313 static const unsigned char wrap_iv[8] = 314 { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 }; 315 316 static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 317 const unsigned char *in, size_t inl) 318 { 319 unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH]; 320 int rv = -1; 321 if (inl < 24) 322 return -1; 323 if (out == NULL) 324 return inl - 16; 325 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8); 326 /* Decrypt first block which will end up as icv */ 327 des_ede_cbc_cipher(ctx, icv, in, 8); 328 /* Decrypt central blocks */ 329 /* 330 * If decrypting in place move whole output along a block so the next 331 * des_ede_cbc_cipher is in place. 332 */ 333 if (out == in) { 334 memmove(out, out + 8, inl - 8); 335 in -= 8; 336 } 337 des_ede_cbc_cipher(ctx, out, in + 8, inl - 16); 338 /* Decrypt final block which will be IV */ 339 des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8); 340 /* Reverse order of everything */ 341 BUF_reverse(icv, NULL, 8); 342 BUF_reverse(out, NULL, inl - 16); 343 BUF_reverse(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 8); 344 /* Decrypt again using new IV */ 345 des_ede_cbc_cipher(ctx, out, out, inl - 16); 346 des_ede_cbc_cipher(ctx, icv, icv, 8); 347 /* Work out SHA1 hash of first portion */ 348 SHA1(out, inl - 16, sha1tmp); 349 350 if (!CRYPTO_memcmp(sha1tmp, icv, 8)) 351 rv = inl - 16; 352 OPENSSL_cleanse(icv, 8); 353 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 354 OPENSSL_cleanse(iv, 8); 355 OPENSSL_cleanse(EVP_CIPHER_CTX_iv_noconst(ctx), 8); 356 if (rv == -1) 357 OPENSSL_cleanse(out, inl - 16); 358 359 return rv; 360 } 361 362 static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 363 const unsigned char *in, size_t inl) 364 { 365 unsigned char sha1tmp[SHA_DIGEST_LENGTH]; 366 if (out == NULL) 367 return inl + 16; 368 /* Copy input to output buffer + 8 so we have space for IV */ 369 memmove(out + 8, in, inl); 370 /* Work out ICV */ 371 SHA1(in, inl, sha1tmp); 372 memcpy(out + inl + 8, sha1tmp, 8); 373 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 374 /* Generate random IV */ 375 if (RAND_bytes(EVP_CIPHER_CTX_iv_noconst(ctx), 8) <= 0) 376 return -1; 377 memcpy(out, EVP_CIPHER_CTX_iv_noconst(ctx), 8); 378 /* Encrypt everything after IV in place */ 379 des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8); 380 BUF_reverse(out, NULL, inl + 16); 381 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8); 382 des_ede_cbc_cipher(ctx, out, out, inl + 16); 383 return inl + 16; 384 } 385 386 static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 387 const unsigned char *in, size_t inl) 388 { 389 /* 390 * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK 391 * is more than will ever be needed. Also input length must be a multiple 392 * of 8 bits. 393 */ 394 if (inl >= EVP_MAXCHUNK || inl % 8) 395 return -1; 396 397 if (is_partially_overlapping(out, in, inl)) { 398 EVPerr(EVP_F_DES_EDE3_WRAP_CIPHER, EVP_R_PARTIALLY_OVERLAPPING); 399 return 0; 400 } 401 402 if (EVP_CIPHER_CTX_encrypting(ctx)) 403 return des_ede3_wrap(ctx, out, in, inl); 404 else 405 return des_ede3_unwrap(ctx, out, in, inl); 406 } 407 408 static const EVP_CIPHER des3_wrap = { 409 NID_id_smime_alg_CMS3DESwrap, 410 8, 24, 0, 411 EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER 412 | EVP_CIPH_FLAG_DEFAULT_ASN1, 413 des_ede3_init_key, des_ede3_wrap_cipher, 414 NULL, 415 sizeof(DES_EDE_KEY), 416 NULL, NULL, NULL, NULL 417 }; 418 419 const EVP_CIPHER *EVP_des_ede3_wrap(void) 420 { 421 return &des3_wrap; 422 } 423 424 #endif 425