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