1 /* crypto/evp/p_lib.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 "cryptlib.h" 61 #include <openssl/bn.h> 62 #include <openssl/err.h> 63 #include <openssl/objects.h> 64 #include <openssl/evp.h> 65 #include <openssl/asn1_mac.h> 66 #include <openssl/x509.h> 67 #ifndef OPENSSL_NO_RSA 68 #include <openssl/rsa.h> 69 #endif 70 #ifndef OPENSSL_NO_DSA 71 #include <openssl/dsa.h> 72 #endif 73 #ifndef OPENSSL_NO_DH 74 #include <openssl/dh.h> 75 #endif 76 77 static void EVP_PKEY_free_it(EVP_PKEY *x); 78 79 int EVP_PKEY_bits(EVP_PKEY *pkey) 80 { 81 if (0) 82 return 0; 83 #ifndef OPENSSL_NO_RSA 84 else if (pkey->type == EVP_PKEY_RSA) 85 return(BN_num_bits(pkey->pkey.rsa->n)); 86 #endif 87 #ifndef OPENSSL_NO_DSA 88 else if (pkey->type == EVP_PKEY_DSA) 89 return(BN_num_bits(pkey->pkey.dsa->p)); 90 #endif 91 #ifndef OPENSSL_NO_EC 92 else if (pkey->type == EVP_PKEY_EC) 93 { 94 BIGNUM *order = BN_new(); 95 const EC_GROUP *group; 96 int ret; 97 98 if (!order) 99 { 100 ERR_clear_error(); 101 return 0; 102 } 103 group = EC_KEY_get0_group(pkey->pkey.ec); 104 if (!EC_GROUP_get_order(group, order, NULL)) 105 { 106 ERR_clear_error(); 107 return 0; 108 } 109 110 ret = BN_num_bits(order); 111 BN_free(order); 112 return ret; 113 } 114 #endif 115 return(0); 116 } 117 118 int EVP_PKEY_size(EVP_PKEY *pkey) 119 { 120 if (pkey == NULL) 121 return(0); 122 #ifndef OPENSSL_NO_RSA 123 if (pkey->type == EVP_PKEY_RSA) 124 return(RSA_size(pkey->pkey.rsa)); 125 else 126 #endif 127 #ifndef OPENSSL_NO_DSA 128 if (pkey->type == EVP_PKEY_DSA) 129 return(DSA_size(pkey->pkey.dsa)); 130 #endif 131 #ifndef OPENSSL_NO_ECDSA 132 if (pkey->type == EVP_PKEY_EC) 133 return(ECDSA_size(pkey->pkey.ec)); 134 #endif 135 136 return(0); 137 } 138 139 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode) 140 { 141 #ifndef OPENSSL_NO_DSA 142 if (pkey->type == EVP_PKEY_DSA) 143 { 144 int ret=pkey->save_parameters; 145 146 if (mode >= 0) 147 pkey->save_parameters=mode; 148 return(ret); 149 } 150 #endif 151 #ifndef OPENSSL_NO_EC 152 if (pkey->type == EVP_PKEY_EC) 153 { 154 int ret = pkey->save_parameters; 155 156 if (mode >= 0) 157 pkey->save_parameters = mode; 158 return(ret); 159 } 160 #endif 161 return(0); 162 } 163 164 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) 165 { 166 if (to->type != from->type) 167 { 168 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES); 169 goto err; 170 } 171 172 if (EVP_PKEY_missing_parameters(from)) 173 { 174 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS); 175 goto err; 176 } 177 #ifndef OPENSSL_NO_DSA 178 if (to->type == EVP_PKEY_DSA) 179 { 180 BIGNUM *a; 181 182 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err; 183 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p); 184 to->pkey.dsa->p=a; 185 186 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err; 187 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q); 188 to->pkey.dsa->q=a; 189 190 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err; 191 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g); 192 to->pkey.dsa->g=a; 193 } 194 #endif 195 #ifndef OPENSSL_NO_EC 196 if (to->type == EVP_PKEY_EC) 197 { 198 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec)); 199 if (group == NULL) 200 goto err; 201 if (EC_KEY_set_group(to->pkey.ec, group) == 0) 202 goto err; 203 EC_GROUP_free(group); 204 } 205 #endif 206 return(1); 207 err: 208 return(0); 209 } 210 211 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) 212 { 213 #ifndef OPENSSL_NO_DSA 214 if (pkey->type == EVP_PKEY_DSA) 215 { 216 DSA *dsa; 217 218 dsa=pkey->pkey.dsa; 219 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL)) 220 return(1); 221 } 222 #endif 223 #ifndef OPENSSL_NO_EC 224 if (pkey->type == EVP_PKEY_EC) 225 { 226 if (EC_KEY_get0_group(pkey->pkey.ec) == NULL) 227 return(1); 228 } 229 #endif 230 231 return(0); 232 } 233 234 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) 235 { 236 #ifndef OPENSSL_NO_DSA 237 if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA)) 238 { 239 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) || 240 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) || 241 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g)) 242 return(0); 243 else 244 return(1); 245 } 246 #endif 247 #ifndef OPENSSL_NO_EC 248 if (a->type == EVP_PKEY_EC && b->type == EVP_PKEY_EC) 249 { 250 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), 251 *group_b = EC_KEY_get0_group(b->pkey.ec); 252 if (EC_GROUP_cmp(group_a, group_b, NULL)) 253 return 0; 254 else 255 return 1; 256 } 257 #endif 258 return(-1); 259 } 260 261 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) 262 { 263 if (a->type != b->type) 264 return -1; 265 266 if (EVP_PKEY_cmp_parameters(a, b) == 0) 267 return 0; 268 269 switch (a->type) 270 { 271 #ifndef OPENSSL_NO_RSA 272 case EVP_PKEY_RSA: 273 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0 274 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0) 275 return 0; 276 break; 277 #endif 278 #ifndef OPENSSL_NO_DSA 279 case EVP_PKEY_DSA: 280 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0) 281 return 0; 282 break; 283 #endif 284 #ifndef OPENSSL_NO_EC 285 case EVP_PKEY_EC: 286 { 287 int r; 288 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec); 289 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), 290 *pb = EC_KEY_get0_public_key(b->pkey.ec); 291 r = EC_POINT_cmp(group, pa, pb, NULL); 292 if (r != 0) 293 { 294 if (r == 1) 295 return 0; 296 else 297 return -2; 298 } 299 } 300 break; 301 #endif 302 #ifndef OPENSSL_NO_DH 303 case EVP_PKEY_DH: 304 return -2; 305 #endif 306 default: 307 return -2; 308 } 309 310 return 1; 311 } 312 313 EVP_PKEY *EVP_PKEY_new(void) 314 { 315 EVP_PKEY *ret; 316 317 ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY)); 318 if (ret == NULL) 319 { 320 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE); 321 return(NULL); 322 } 323 ret->type=EVP_PKEY_NONE; 324 ret->references=1; 325 ret->pkey.ptr=NULL; 326 ret->attributes=NULL; 327 ret->save_parameters=1; 328 return(ret); 329 } 330 331 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key) 332 { 333 if (pkey == NULL) return(0); 334 if (pkey->pkey.ptr != NULL) 335 EVP_PKEY_free_it(pkey); 336 pkey->type=EVP_PKEY_type(type); 337 pkey->save_type=type; 338 pkey->pkey.ptr=key; 339 return(key != NULL); 340 } 341 342 #ifndef OPENSSL_NO_RSA 343 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) 344 { 345 int ret = EVP_PKEY_assign_RSA(pkey, key); 346 if(ret) 347 RSA_up_ref(key); 348 return ret; 349 } 350 351 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) 352 { 353 if(pkey->type != EVP_PKEY_RSA) { 354 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY); 355 return NULL; 356 } 357 RSA_up_ref(pkey->pkey.rsa); 358 return pkey->pkey.rsa; 359 } 360 #endif 361 362 #ifndef OPENSSL_NO_DSA 363 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) 364 { 365 int ret = EVP_PKEY_assign_DSA(pkey, key); 366 if(ret) 367 DSA_up_ref(key); 368 return ret; 369 } 370 371 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) 372 { 373 if(pkey->type != EVP_PKEY_DSA) { 374 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY); 375 return NULL; 376 } 377 DSA_up_ref(pkey->pkey.dsa); 378 return pkey->pkey.dsa; 379 } 380 #endif 381 382 #ifndef OPENSSL_NO_EC 383 384 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) 385 { 386 int ret = EVP_PKEY_assign_EC_KEY(pkey,key); 387 if (ret) 388 EC_KEY_up_ref(key); 389 return ret; 390 } 391 392 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) 393 { 394 if (pkey->type != EVP_PKEY_EC) 395 { 396 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY); 397 return NULL; 398 } 399 EC_KEY_up_ref(pkey->pkey.ec); 400 return pkey->pkey.ec; 401 } 402 #endif 403 404 405 #ifndef OPENSSL_NO_DH 406 407 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key) 408 { 409 int ret = EVP_PKEY_assign_DH(pkey, key); 410 if(ret) 411 DH_up_ref(key); 412 return ret; 413 } 414 415 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) 416 { 417 if(pkey->type != EVP_PKEY_DH) { 418 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY); 419 return NULL; 420 } 421 DH_up_ref(pkey->pkey.dh); 422 return pkey->pkey.dh; 423 } 424 #endif 425 426 int EVP_PKEY_type(int type) 427 { 428 switch (type) 429 { 430 case EVP_PKEY_RSA: 431 case EVP_PKEY_RSA2: 432 return(EVP_PKEY_RSA); 433 case EVP_PKEY_DSA: 434 case EVP_PKEY_DSA1: 435 case EVP_PKEY_DSA2: 436 case EVP_PKEY_DSA3: 437 case EVP_PKEY_DSA4: 438 return(EVP_PKEY_DSA); 439 case EVP_PKEY_DH: 440 return(EVP_PKEY_DH); 441 case EVP_PKEY_EC: 442 return(EVP_PKEY_EC); 443 default: 444 return(NID_undef); 445 } 446 } 447 448 void EVP_PKEY_free(EVP_PKEY *x) 449 { 450 int i; 451 452 if (x == NULL) return; 453 454 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY); 455 #ifdef REF_PRINT 456 REF_PRINT("EVP_PKEY",x); 457 #endif 458 if (i > 0) return; 459 #ifdef REF_CHECK 460 if (i < 0) 461 { 462 fprintf(stderr,"EVP_PKEY_free, bad reference count\n"); 463 abort(); 464 } 465 #endif 466 EVP_PKEY_free_it(x); 467 if (x->attributes) 468 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); 469 OPENSSL_free(x); 470 } 471 472 static void EVP_PKEY_free_it(EVP_PKEY *x) 473 { 474 switch (x->type) 475 { 476 #ifndef OPENSSL_NO_RSA 477 case EVP_PKEY_RSA: 478 case EVP_PKEY_RSA2: 479 RSA_free(x->pkey.rsa); 480 break; 481 #endif 482 #ifndef OPENSSL_NO_DSA 483 case EVP_PKEY_DSA: 484 case EVP_PKEY_DSA2: 485 case EVP_PKEY_DSA3: 486 case EVP_PKEY_DSA4: 487 DSA_free(x->pkey.dsa); 488 break; 489 #endif 490 #ifndef OPENSSL_NO_EC 491 case EVP_PKEY_EC: 492 EC_KEY_free(x->pkey.ec); 493 break; 494 #endif 495 #ifndef OPENSSL_NO_DH 496 case EVP_PKEY_DH: 497 DH_free(x->pkey.dh); 498 break; 499 #endif 500 } 501 } 502 503
