crypto/engine/engine_list.c

   1 /* crypto/engine/engine_list.c */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <openssl/crypto.h>
  60 #include "cryptlib.h"
  61 #include "engine_int.h"
  62 #include <openssl/engine.h>
  63
  64 /* The linked-list of pointers to engine types. engine_list_head
  65  * incorporates an implicit structural reference but engine_list_tail
  66  * does not - the latter is a computational niceity and only points
  67  * to something that is already pointed to by its predecessor in the
  68  * list (or engine_list_head itself). In the same way, the use of the
  69  * "prev" pointer in each ENGINE is to save excessive list iteration,
  70  * it doesn't correspond to an extra structural reference. Hence,
  71  * engine_list_head, and each non-null "next" pointer account for
  72  * the list itself assuming exactly 1 structural reference on each
  73  * list member. */
  74 static ENGINE *engine_list_head = NULL;
  75 static ENGINE *engine_list_tail = NULL;
  76 /* A boolean switch, used to ensure we only initialise once. This
  77  * is needed because the engine list may genuinely become empty during
  78  * use (so we can't use engine_list_head as an indicator for example. */
  79 static int engine_list_flag = 0;
  80 static int ENGINE_free_util(ENGINE *e, int locked);
  81
  82 /* These static functions starting with a lower case "engine_" always
  83  * take place when CRYPTO_LOCK_ENGINE has been locked up. */
  84 static int engine_list_add(ENGINE *e)
  85         {
  86         int conflict = 0;
  87         ENGINE *iterator = NULL;
  88
  89         if(e == NULL)
  90                 {
  91                 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
  92                         ERR_R_PASSED_NULL_PARAMETER);
  93                 return 0;
  94                 }
  95         iterator = engine_list_head;
  96         while(iterator && !conflict)
  97                 {
  98                 conflict = (strcmp(iterator->id, e->id) == 0);
  99                 iterator = iterator->next;
 100                 }
 101         if(conflict)
 102                 {
 103                 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 104                         ENGINE_R_CONFLICTING_ENGINE_ID);
 105                 return 0;
 106                 }
 107         if(engine_list_head == NULL)
 108                 {
 109                 /* We are adding to an empty list. */
 110                 if(engine_list_tail)
 111                         {
 112                         ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 113                                 ENGINE_R_INTERNAL_LIST_ERROR);
 114                         return 0;
 115                         }
 116                 engine_list_head = e;
 117                 e->prev = NULL;
 118                 }
 119         else
 120                 {
 121                 /* We are adding to the tail of an existing list. */
 122                 if((engine_list_tail == NULL) ||
 123                                 (engine_list_tail->next != NULL))
 124                         {
 125                         ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 126                                 ENGINE_R_INTERNAL_LIST_ERROR);
 127                         return 0;
 128                         }
 129                 engine_list_tail->next = e;
 130                 e->prev = engine_list_tail;
 131                 }
 132         /* Having the engine in the list assumes a structural
 133          * reference. */
 134         e->struct_ref++;
 135         engine_ref_debug(e, 0, 1)
 136         /* However it came to be, e is the last item in the list. */
 137         engine_list_tail = e;
 138         e->next = NULL;
 139         return 1;
 140         }
 141
 142 static int engine_list_remove(ENGINE *e)
 143         {
 144         ENGINE *iterator;
 145
 146         if(e == NULL)
 147                 {
 148                 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
 149                         ERR_R_PASSED_NULL_PARAMETER);
 150                 return 0;
 151                 }
 152         /* We need to check that e is in our linked list! */
 153         iterator = engine_list_head;
 154         while(iterator && (iterator != e))
 155                 iterator = iterator->next;
 156         if(iterator == NULL)
 157                 {
 158                 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
 159                         ENGINE_R_ENGINE_IS_NOT_IN_LIST);
 160                 return 0;
 161                 }
 162         /* un-link e from the chain. */
 163         if(e->next)
 164                 e->next->prev = e->prev;
 165         if(e->prev)
 166                 e->prev->next = e->next;
 167         /* Correct our head/tail if necessary. */
 168         if(engine_list_head == e)
 169                 engine_list_head = e->next;
 170         if(engine_list_tail == e)
 171                 engine_list_tail = e->prev;
 172         ENGINE_free_util(e, 0);
 173         return 1;
 174         }
 175
 176 /* This check always takes place with CRYPTO_LOCK_ENGINE locked up
 177  * so we're synchronised, but we can't call anything that tries to
 178  * lock it again! :-) NB: For convenience (and code-clarity) we
 179  * don't output errors for failures of the engine_list_add function
 180  * as it will generate errors itself. */
 181 static int engine_internal_check(void)
 182         {
 183         int toret = 1;
 184         ENGINE *def_engine;
 185         if(engine_list_flag)
 186                 return 1;
 187         /* This is our first time up, we need to populate the list
 188          * with our statically compiled-in engines. */
 189         def_engine = ENGINE_openssl();
 190         if(!engine_list_add(def_engine))
 191                 toret = 0;
 192         else
 193                 engine_list_flag = 1;
 194         ENGINE_free_util(def_engine, 0);
 195         return 1;
 196         }
 197
 198 /* Get the first/last "ENGINE" type available. */
 199 ENGINE *ENGINE_get_first(void)
 200         {
 201         ENGINE *ret = NULL;
 202
 203         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 204         if(engine_internal_check())
 205                 {
 206                 ret = engine_list_head;
 207                 if(ret)
 208                         {
 209                         ret->struct_ref++;
 210                         engine_ref_debug(ret, 0, 1)
 211                         }
 212                 }
 213         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 214         return ret;
 215         }
 216 ENGINE *ENGINE_get_last(void)
 217         {
 218         ENGINE *ret = NULL;
 219
 220         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 221         if(engine_internal_check())
 222                 {
 223                 ret = engine_list_tail;
 224                 if(ret)
 225                         {
 226                         ret->struct_ref++;
 227                         engine_ref_debug(ret, 0, 1)
 228                         }
 229                 }
 230         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 231         return ret;
 232         }
 233
 234 /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
 235 ENGINE *ENGINE_get_next(ENGINE *e)
 236         {
 237         ENGINE *ret = NULL;
 238         if(e == NULL)
 239                 {
 240                 ENGINEerr(ENGINE_F_ENGINE_GET_NEXT,
 241                         ERR_R_PASSED_NULL_PARAMETER);
 242                 return 0;
 243                 }
 244         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 245         ret = e->next;
 246         if(ret)
 247                 {
 248                 /* Return a valid structural refernce to the next ENGINE */
 249                 ret->struct_ref++;
 250                 engine_ref_debug(ret, 0, 1)
 251                 }
 252         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 253         /* Release the structural reference to the previous ENGINE */
 254         ENGINE_free(e);
 255         return ret;
 256         }
 257 ENGINE *ENGINE_get_prev(ENGINE *e)
 258         {
 259         ENGINE *ret = NULL;
 260         if(e == NULL)
 261                 {
 262                 ENGINEerr(ENGINE_F_ENGINE_GET_PREV,
 263                         ERR_R_PASSED_NULL_PARAMETER);
 264                 return 0;
 265                 }
 266         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 267         ret = e->prev;
 268         if(ret)
 269                 {
 270                 /* Return a valid structural reference to the next ENGINE */
 271                 ret->struct_ref++;
 272                 engine_ref_debug(ret, 0, 1)
 273                 }
 274         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 275         /* Release the structural reference to the previous ENGINE */
 276         ENGINE_free(e);
 277         return ret;
 278         }
 279
 280 /* Add another "ENGINE" type into the list. */
 281 int ENGINE_add(ENGINE *e)
 282         {
 283         int to_return = 1;
 284         if(e == NULL)
 285                 {
 286                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 287                         ERR_R_PASSED_NULL_PARAMETER);
 288                 return 0;
 289                 }
 290         if((e->id == NULL) || (e->name == NULL))
 291                 {
 292                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 293                         ENGINE_R_ID_OR_NAME_MISSING);
 294                 }
 295         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 296         if(!engine_internal_check() || !engine_list_add(e))
 297                 {
 298                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 299                         ENGINE_R_INTERNAL_LIST_ERROR);
 300                 to_return = 0;
 301                 }
 302         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 303         return to_return;
 304         }
 305
 306 /* Remove an existing "ENGINE" type from the array. */
 307 int ENGINE_remove(ENGINE *e)
 308         {
 309         int to_return = 1;
 310         if(e == NULL)
 311                 {
 312                 ENGINEerr(ENGINE_F_ENGINE_REMOVE,
 313                         ERR_R_PASSED_NULL_PARAMETER);
 314                 return 0;
 315                 }
 316         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 317         if(!engine_internal_check() || !engine_list_remove(e))
 318                 {
 319                 ENGINEerr(ENGINE_F_ENGINE_REMOVE,
 320                         ENGINE_R_INTERNAL_LIST_ERROR);
 321                 to_return = 0;
 322                 }
 323         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 324         return to_return;
 325         }
 326
 327 ENGINE *ENGINE_by_id(const char *id)
 328         {
 329         ENGINE *iterator = NULL, *cp = NULL;
 330         if(id == NULL)
 331                 {
 332                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 333                         ERR_R_PASSED_NULL_PARAMETER);
 334                 return NULL;
 335                 }
 336         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 337         if(!engine_internal_check())
 338                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 339                         ENGINE_R_INTERNAL_LIST_ERROR);
 340         else
 341                 {
 342                 iterator = engine_list_head;
 343                 while(iterator && (strcmp(id, iterator->id) != 0))
 344                         iterator = iterator->next;
 345                 if(iterator)
 346                         {
 347                         /* We need to return a structural reference. If this is
 348                          * a "dynamic" ENGINE type, make a duplicate - otherwise
 349                          * increment the existing ENGINE's reference count. */
 350                         if(iterator->flags & ENGINE_FLAGS_BY_ID_COPY)
 351                                 {
 352                                 cp = ENGINE_new();
 353                                 if(!cp)
 354                                         iterator = NULL;
 355                                 else
 356                                         {
 357                                         ENGINE_cpy(cp, iterator);
 358                                         iterator = cp;
 359                                         }
 360                                 }
 361                         else
 362                                 {
 363                                 iterator->struct_ref++;
 364                                 engine_ref_debug(iterator, 0, 1)
 365                                 }
 366                         }
 367                 }
 368         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 369         if(iterator == NULL)
 370                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 371                         ENGINE_R_NO_SUCH_ENGINE);
 372         return iterator;
 373         }
 374
 375 ENGINE *ENGINE_new(void)
 376         {
 377         ENGINE *ret;
 378
 379         ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE));
 380         if(ret == NULL)
 381                 {
 382                 ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);
 383                 return NULL;
 384                 }
 385         memset(ret, 0, sizeof(ENGINE));
 386         ret->struct_ref = 1;
 387         engine_ref_debug(ret, 0, 1)
 388         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data);
 389         return ret;
 390         }
 391
 392 static int ENGINE_free_util(ENGINE *e, int locked)
 393         {
 394         int i;
 395
 396         if(e == NULL)
 397                 {
 398                 ENGINEerr(ENGINE_F_ENGINE_FREE,
 399                         ERR_R_PASSED_NULL_PARAMETER);
 400                 return 0;
 401                 }
 402         if(locked)
 403                 i = CRYPTO_add(&e->struct_ref,-1,CRYPTO_LOCK_ENGINE);
 404         else
 405                 i = --e->struct_ref;
 406         engine_ref_debug(e, 0, -1)
 407         if (i > 0) return 1;
 408 #ifdef REF_CHECK
 409         if (i < 0)
 410                 {
 411                 fprintf(stderr,"ENGINE_free, bad structural reference count\n");
 412                 abort();
 413                 }
 414 #endif
 415         sk_ENGINE_EVP_CIPHER_pop_free(e->ciphers,ENGINE_free_engine_cipher);
 416         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);
 417         OPENSSL_free(e);
 418         return 1;
 419         }
 420
 421 int ENGINE_free(ENGINE *e)
 422         {
 423         return ENGINE_free_util(e, 1);
 424         }
 425
 426 int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 427                 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 428         {
 429         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, argl, argp,
 430                         new_func, dup_func, free_func);
 431         }
 432
 433 int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)
 434         {
 435         return(CRYPTO_set_ex_data(&e->ex_data, idx, arg));
 436         }
 437
 438 void *ENGINE_get_ex_data(const ENGINE *e, int idx)
 439         {
 440         return(CRYPTO_get_ex_data(&e->ex_data, idx));
 441         }
 442
 443 void ENGINE_cleanup(void)
 444         {
 445         ENGINE *iterator = engine_list_head;
 446
 447         while(iterator != NULL)
 448                 {
 449                 ENGINE_remove(iterator);
 450                 iterator = engine_list_head;
 451                 }
 452         engine_list_flag = 0;
 453         /* Also unset any "default" ENGINEs that may have been set up (a default
 454          * constitutes a functional reference on an ENGINE and there's one for
 455          * each algorithm). */
 456         ENGINE_clear_defaults();
 457         return;
 458         }
 459
 460 int ENGINE_set_id(ENGINE *e, const char *id)
 461         {
 462         if(id == NULL)
 463                 {
 464                 ENGINEerr(ENGINE_F_ENGINE_SET_ID,
 465                         ERR_R_PASSED_NULL_PARAMETER);
 466                 return 0;
 467                 }
 468         e->id = id;
 469         return 1;
 470         }
 471
 472 int ENGINE_set_name(ENGINE *e, const char *name)
 473         {
 474         if(name == NULL)
 475                 {
 476                 ENGINEerr(ENGINE_F_ENGINE_SET_NAME,
 477                         ERR_R_PASSED_NULL_PARAMETER);
 478                 return 0;
 479                 }
 480         e->name = name;
 481         return 1;
 482         }
 483
 484 int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth)
 485         {
 486 #ifndef OPENSSL_NO_RSA
 487         e->rsa_meth = rsa_meth;
 488         return 1;
 489 #else
 490         return 0;
 491 #endif
 492         }
 493
 494 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
 495         {
 496 #ifndef OPENSSL_NO_DSA
 497         e->dsa_meth = dsa_meth;
 498         return 1;
 499 #else
 500         return 0;
 501 #endif
 502         }
 503
 504 int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
 505         {
 506 #ifndef OPENSSL_NO_DH
 507         e->dh_meth = dh_meth;
 508         return 1;
 509 #else
 510         return 0;
 511 #endif
 512         }
 513
 514 int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth)
 515         {
 516         e->rand_meth = rand_meth;
 517         return 1;
 518         }
 519
 520 int ENGINE_set_BN_mod_exp(ENGINE *e, BN_MOD_EXP bn_mod_exp)
 521         {
 522         e->bn_mod_exp = bn_mod_exp;
 523         return 1;
 524         }
 525
 526 int ENGINE_set_BN_mod_exp_crt(ENGINE *e, BN_MOD_EXP_CRT bn_mod_exp_crt)
 527         {
 528         e->bn_mod_exp_crt = bn_mod_exp_crt;
 529         return 1;
 530         }
 531
 532 int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)
 533         {
 534         e->init = init_f;
 535         return 1;
 536         }
 537
 538 int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)
 539         {
 540         e->finish = finish_f;
 541         return 1;
 542         }
 543
 544 int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)
 545         {
 546         e->ctrl = ctrl_f;
 547         return 1;
 548         }
 549
 550 int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f)
 551         {
 552         e->load_privkey = loadpriv_f;
 553         return 1;
 554         }
 555
 556 int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f)
 557         {
 558         e->load_pubkey = loadpub_f;
 559         return 1;
 560         }
 561
 562 int ENGINE_set_flags(ENGINE *e, int flags)
 563         {
 564         e->flags = flags;
 565         return 1;
 566         }
 567
 568 int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)
 569         {
 570         e->cmd_defns = defns;
 571         return 1;
 572         }
 573
 574 int ENGINE_cpy(ENGINE *dest, const ENGINE *src)
 575         {
 576         if(ENGINE_set_id(dest, ENGINE_get_id(src)) &&
 577                         ENGINE_set_name(dest, ENGINE_get_name(src)) &&
 578 #ifndef OPENSSL_NO_RSA
 579                         ENGINE_set_RSA(dest, ENGINE_get_RSA(src)) &&
 580 #endif
 581 #ifndef OPENSSL_NO_RSA
 582                         ENGINE_set_DSA(dest, ENGINE_get_DSA(src)) &&
 583 #endif
 584 #ifndef OPENSSL_NO_RSA
 585                         ENGINE_set_DH(dest, ENGINE_get_DH(src)) &&
 586 #endif
 587                         ENGINE_set_RAND(dest, ENGINE_get_RAND(src)) &&
 588                         ENGINE_set_BN_mod_exp(dest,
 589                                         ENGINE_get_BN_mod_exp(src)) &&
 590                         ENGINE_set_BN_mod_exp_crt(dest,
 591                                         ENGINE_get_BN_mod_exp_crt(src)) &&
 592                         ENGINE_set_init_function(dest,
 593                                         ENGINE_get_init_function(src)) &&
 594                         ENGINE_set_finish_function(dest,
 595                                         ENGINE_get_finish_function(src)) &&
 596                         ENGINE_set_ctrl_function(dest,
 597                                         ENGINE_get_ctrl_function(src)) &&
 598                         ENGINE_set_load_privkey_function(dest,
 599                                         ENGINE_get_load_privkey_function(src)) &&
 600                         ENGINE_set_load_pubkey_function(dest,
 601                                         ENGINE_get_load_pubkey_function(src)) &&
 602                         ENGINE_set_flags(dest, ENGINE_get_flags(src)) &&
 603                         ENGINE_set_cmd_defns(dest, ENGINE_get_cmd_defns(src)))
 604                 return 1;
 605         return 0;
 606         }
 607
 608 const char *ENGINE_get_id(const ENGINE *e)
 609         {
 610         return e->id;
 611         }
 612
 613 const char *ENGINE_get_name(const ENGINE *e)
 614         {
 615         return e->name;
 616         }
 617
 618 const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e)
 619         {
 620         return e->rsa_meth;
 621         }
 622
 623 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e)
 624         {
 625         return e->dsa_meth;
 626         }
 627
 628 const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
 629         {
 630         return e->dh_meth;
 631         }
 632
 633 const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e)
 634         {
 635         return e->rand_meth;
 636         }
 637
 638 BN_MOD_EXP ENGINE_get_BN_mod_exp(const ENGINE *e)
 639         {
 640         return e->bn_mod_exp;
 641         }
 642
 643 BN_MOD_EXP_CRT ENGINE_get_BN_mod_exp_crt(const ENGINE *e)
 644         {
 645         return e->bn_mod_exp_crt;
 646         }
 647
 648 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)
 649         {
 650         return e->init;
 651         }
 652
 653 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)
 654         {
 655         return e->finish;
 656         }
 657
 658 ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)
 659         {
 660         return e->ctrl;
 661         }
 662
 663 ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e)
 664         {
 665         return e->load_privkey;
 666         }
 667
 668 ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e)
 669         {
 670         return e->load_pubkey;
 671         }
 672
 673 int ENGINE_get_flags(const ENGINE *e)
 674         {
 675         return e->flags;
 676         }
 677
 678 const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)
 679         {
 680         return e->cmd_defns;
 681         }