crypto/evp/p_lib.c

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