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 /* Weird "ex_data" handling. Some have suggested there's some problems with the
  65  * CRYPTO_EX_DATA code (or model), but for now I'm implementing it exactly as
  66  * it's done in crypto/rsa/. That way the usage and documentation of that can be
  67  * used to assist here, and any changes or fixes made there should similarly map
  68  * over here quite straightforwardly. */
  69 static int engine_ex_data_num = 0;
  70 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *engine_ex_data_stack = NULL;
  71
  72 /* The linked-list of pointers to engine types. engine_list_head
  73  * incorporates an implicit structural reference but engine_list_tail
  74  * does not - the latter is a computational niceity and only points
  75  * to something that is already pointed to by its predecessor in the
  76  * list (or engine_list_head itself). In the same way, the use of the
  77  * "prev" pointer in each ENGINE is to save excessive list iteration,
  78  * it doesn't correspond to an extra structural reference. Hence,
  79  * engine_list_head, and each non-null "next" pointer account for
  80  * the list itself assuming exactly 1 structural reference on each
  81  * list member. */
  82 static ENGINE *engine_list_head = NULL;
  83 static ENGINE *engine_list_tail = NULL;
  84 /* A boolean switch, used to ensure we only initialise once. This
  85  * is needed because the engine list may genuinely become empty during
  86  * use (so we can't use engine_list_head as an indicator for example. */
  87 static int engine_list_flag = 0;
  88
  89 /* These static functions starting with a lower case "engine_" always
  90  * take place when CRYPTO_LOCK_ENGINE has been locked up. */
  91 static int engine_list_add(ENGINE *e)
  92         {
  93         int conflict = 0;
  94         ENGINE *iterator = NULL;
  95
  96         if(e == NULL)
  97                 {
  98                 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
  99                         ERR_R_PASSED_NULL_PARAMETER);
 100                 return 0;
 101                 }
 102         iterator = engine_list_head;
 103         while(iterator && !conflict)
 104                 {
 105                 conflict = (strcmp(iterator->id, e->id) == 0);
 106                 iterator = iterator->next;
 107                 }
 108         if(conflict)
 109                 {
 110                 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 111                         ENGINE_R_CONFLICTING_ENGINE_ID);
 112                 return 0;
 113                 }
 114         if(engine_list_head == NULL)
 115                 {
 116                 /* We are adding to an empty list. */
 117                 if(engine_list_tail)
 118                         {
 119                         ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 120                                 ENGINE_R_INTERNAL_LIST_ERROR);
 121                         return 0;
 122                         }
 123                 engine_list_head = e;
 124                 e->prev = NULL;
 125                 }
 126         else
 127                 {
 128                 /* We are adding to the tail of an existing list. */
 129                 if((engine_list_tail == NULL) ||
 130                                 (engine_list_tail->next != NULL))
 131                         {
 132                         ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
 133                                 ENGINE_R_INTERNAL_LIST_ERROR);
 134                         return 0;
 135                         }
 136                 engine_list_tail->next = e;
 137                 e->prev = engine_list_tail;
 138                 }
 139         /* Having the engine in the list assumes a structural
 140          * reference. */
 141         e->struct_ref++;
 142         engine_ref_debug(e, 0, 1)
 143         /* However it came to be, e is the last item in the list. */
 144         engine_list_tail = e;
 145         e->next = NULL;
 146         return 1;
 147         }
 148
 149 static int engine_list_remove(ENGINE *e)
 150         {
 151         ENGINE *iterator;
 152
 153         if(e == NULL)
 154                 {
 155                 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
 156                         ERR_R_PASSED_NULL_PARAMETER);
 157                 return 0;
 158                 }
 159         /* We need to check that e is in our linked list! */
 160         iterator = engine_list_head;
 161         while(iterator && (iterator != e))
 162                 iterator = iterator->next;
 163         if(iterator == NULL)
 164                 {
 165                 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
 166                         ENGINE_R_ENGINE_IS_NOT_IN_LIST);
 167                 return 0;
 168                 }
 169         /* un-link e from the chain. */
 170         if(e->next)
 171                 e->next->prev = e->prev;
 172         if(e->prev)
 173                 e->prev->next = e->next;
 174         /* Correct our head/tail if necessary. */
 175         if(engine_list_head == e)
 176                 engine_list_head = e->next;
 177         if(engine_list_tail == e)
 178                 engine_list_tail = e->prev;
 179         /* remove our structural reference. */
 180         e->struct_ref--;
 181         engine_ref_debug(e, 0, -1)
 182         return 1;
 183         }
 184
 185 /* This check always takes place with CRYPTO_LOCK_ENGINE locked up
 186  * so we're synchronised, but we can't call anything that tries to
 187  * lock it again! :-) NB: For convenience (and code-clarity) we
 188  * don't output errors for failures of the engine_list_add function
 189  * as it will generate errors itself. */
 190 static int engine_internal_check(void)
 191         {
 192         int toret = 1;
 193         ENGINE *def_engine;
 194         if(engine_list_flag)
 195                 return 1;
 196         /* This is our first time up, we need to populate the list
 197          * with our statically compiled-in engines. */
 198         def_engine = ENGINE_openssl();
 199         if(!engine_list_add(def_engine))
 200                 toret = 0;
 201         else
 202                 engine_list_flag = 1;
 203 #if 0
 204         ENGINE_free(def_engine);
 205 #else
 206         /* We can't ENGINE_free() because the lock's already held */
 207         def_engine->struct_ref--;
 208         engine_ref_debug(def_engine, 0, -1)
 209 #endif
 210         return 1;
 211         }
 212
 213 /* Get the first/last "ENGINE" type available. */
 214 ENGINE *ENGINE_get_first(void)
 215         {
 216         ENGINE *ret = NULL;
 217
 218         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 219         if(engine_internal_check())
 220                 {
 221                 ret = engine_list_head;
 222                 if(ret)
 223                         {
 224                         ret->struct_ref++;
 225                         engine_ref_debug(ret, 0, 1)
 226                         }
 227                 }
 228         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 229         return ret;
 230         }
 231 ENGINE *ENGINE_get_last(void)
 232         {
 233         ENGINE *ret = NULL;
 234
 235         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 236         if(engine_internal_check())
 237                 {
 238                 ret = engine_list_tail;
 239                 if(ret)
 240                         {
 241                         ret->struct_ref++;
 242                         engine_ref_debug(ret, 0, 1)
 243                         }
 244                 }
 245         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 246         return ret;
 247         }
 248
 249 /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
 250 ENGINE *ENGINE_get_next(ENGINE *e)
 251         {
 252         ENGINE *ret = NULL;
 253         if(e == NULL)
 254                 {
 255                 ENGINEerr(ENGINE_F_ENGINE_GET_NEXT,
 256                         ERR_R_PASSED_NULL_PARAMETER);
 257                 return 0;
 258                 }
 259         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 260         ret = e->next;
 261         if(ret)
 262                 {
 263                 /* Return a valid structural refernce to the next ENGINE */
 264                 ret->struct_ref++;
 265                 engine_ref_debug(ret, 0, 1)
 266                 }
 267         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 268         /* Release the structural reference to the previous ENGINE */
 269         ENGINE_free(e);
 270         return ret;
 271         }
 272 ENGINE *ENGINE_get_prev(ENGINE *e)
 273         {
 274         ENGINE *ret = NULL;
 275         if(e == NULL)
 276                 {
 277                 ENGINEerr(ENGINE_F_ENGINE_GET_PREV,
 278                         ERR_R_PASSED_NULL_PARAMETER);
 279                 return 0;
 280                 }
 281         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 282         ret = e->prev;
 283         if(ret)
 284                 {
 285                 /* Return a valid structural reference to the next ENGINE */
 286                 ret->struct_ref++;
 287                 engine_ref_debug(ret, 0, 1)
 288                 }
 289         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 290         /* Release the structural reference to the previous ENGINE */
 291         ENGINE_free(e);
 292         return ret;
 293         }
 294
 295 /* Add another "ENGINE" type into the list. */
 296 int ENGINE_add(ENGINE *e)
 297         {
 298         int to_return = 1;
 299         if(e == NULL)
 300                 {
 301                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 302                         ERR_R_PASSED_NULL_PARAMETER);
 303                 return 0;
 304                 }
 305         if((e->id == NULL) || (e->name == NULL))
 306                 {
 307                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 308                         ENGINE_R_ID_OR_NAME_MISSING);
 309                 }
 310         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 311         if(!engine_internal_check() || !engine_list_add(e))
 312                 {
 313                 ENGINEerr(ENGINE_F_ENGINE_ADD,
 314                         ENGINE_R_INTERNAL_LIST_ERROR);
 315                 to_return = 0;
 316                 }
 317         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 318         return to_return;
 319         }
 320
 321 /* Remove an existing "ENGINE" type from the array. */
 322 int ENGINE_remove(ENGINE *e)
 323         {
 324         int to_return = 1;
 325         if(e == NULL)
 326                 {
 327                 ENGINEerr(ENGINE_F_ENGINE_REMOVE,
 328                         ERR_R_PASSED_NULL_PARAMETER);
 329                 return 0;
 330                 }
 331         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 332         if(!engine_internal_check() || !engine_list_remove(e))
 333                 {
 334                 ENGINEerr(ENGINE_F_ENGINE_REMOVE,
 335                         ENGINE_R_INTERNAL_LIST_ERROR);
 336                 to_return = 0;
 337                 }
 338         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 339         return to_return;
 340         }
 341
 342 ENGINE *ENGINE_by_id(const char *id)
 343         {
 344         ENGINE *iterator = NULL, *cp = NULL;
 345         if(id == NULL)
 346                 {
 347                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 348                         ERR_R_PASSED_NULL_PARAMETER);
 349                 return NULL;
 350                 }
 351         CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
 352         if(!engine_internal_check())
 353                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 354                         ENGINE_R_INTERNAL_LIST_ERROR);
 355         else
 356                 {
 357                 iterator = engine_list_head;
 358                 while(iterator && (strcmp(id, iterator->id) != 0))
 359                         iterator = iterator->next;
 360                 if(iterator)
 361                         {
 362                         /* We need to return a structural reference. If this is
 363                          * a "dynamic" ENGINE type, make a duplicate - otherwise
 364                          * increment the existing ENGINE's reference count. */
 365                         if(iterator->flags & ENGINE_FLAGS_BY_ID_COPY)
 366                                 {
 367                                 cp = ENGINE_new();
 368                                 if(!cp)
 369                                         iterator = NULL;
 370                                 else
 371                                         {
 372                                         ENGINE_cpy(cp, iterator);
 373                                         iterator = cp;
 374                                         }
 375                                 }
 376                         else
 377                                 {
 378                                 iterator->struct_ref++;
 379                                 engine_ref_debug(iterator, 0, 1)
 380                                 }
 381                         }
 382                 }
 383         CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
 384         if(iterator == NULL)
 385                 ENGINEerr(ENGINE_F_ENGINE_BY_ID,
 386                         ENGINE_R_NO_SUCH_ENGINE);
 387         return iterator;
 388         }
 389
 390 ENGINE *ENGINE_new(void)
 391         {
 392         ENGINE *ret;
 393
 394         ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE));
 395         if(ret == NULL)
 396                 {
 397                 ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);
 398                 return NULL;
 399                 }
 400         memset(ret, 0, sizeof(ENGINE));
 401         ret->struct_ref = 1;
 402         engine_ref_debug(ret, 0, 1)
 403         CRYPTO_new_ex_data(engine_ex_data_stack, ret, &ret->ex_data);
 404         return ret;
 405         }
 406
 407 int ENGINE_free(ENGINE *e)
 408         {
 409         int i;
 410
 411         if(e == NULL)
 412                 {
 413                 ENGINEerr(ENGINE_F_ENGINE_FREE,
 414                         ERR_R_PASSED_NULL_PARAMETER);
 415                 return 0;
 416                 }
 417         i = CRYPTO_add(&e->struct_ref,-1,CRYPTO_LOCK_ENGINE);
 418         engine_ref_debug(e, 0, -1)
 419         if (i > 0) return 1;
 420 #ifdef REF_CHECK
 421         if (i < 0)
 422                 {
 423                 fprintf(stderr,"ENGINE_free, bad structural reference count\n");
 424                 abort();
 425                 }
 426 #endif
 427         CRYPTO_free_ex_data(engine_ex_data_stack, e, &e->ex_data);
 428         OPENSSL_free(e);
 429         return 1;
 430         }
 431
 432 int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 433                 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 434         {
 435         engine_ex_data_num++;
 436         return(CRYPTO_get_ex_new_index(engine_ex_data_num - 1,
 437                         &engine_ex_data_stack, argl, argp,
 438                         new_func, dup_func, free_func));
 439         }
 440
 441 int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)
 442         {
 443         return(CRYPTO_set_ex_data(&e->ex_data, idx, arg));
 444         }
 445
 446 void *ENGINE_get_ex_data(const ENGINE *e, int idx)
 447         {
 448         return(CRYPTO_get_ex_data(&e->ex_data, idx));
 449         }
 450
 451 void ENGINE_cleanup(void)
 452         {
 453         ENGINE *iterator = engine_list_head;
 454
 455         while(iterator != NULL)
 456                 {
 457                 ENGINE_remove(iterator);
 458                 iterator = engine_list_head;
 459                 }
 460         engine_list_flag = 0;
 461         /* Also unset any "default" ENGINEs that may have been set up (a default
 462          * constitutes a functional reference on an ENGINE and there's one for
 463          * each algorithm). */
 464         ENGINE_clear_defaults();
 465         return;
 466         }
 467
 468 int ENGINE_set_id(ENGINE *e, const char *id)
 469         {
 470         if(id == NULL)
 471                 {
 472                 ENGINEerr(ENGINE_F_ENGINE_SET_ID,
 473                         ERR_R_PASSED_NULL_PARAMETER);
 474                 return 0;
 475                 }
 476         e->id = id;
 477         return 1;
 478         }
 479
 480 int ENGINE_set_name(ENGINE *e, const char *name)
 481         {
 482         if(name == NULL)
 483                 {
 484                 ENGINEerr(ENGINE_F_ENGINE_SET_NAME,
 485                         ERR_R_PASSED_NULL_PARAMETER);
 486                 return 0;
 487                 }
 488         e->name = name;
 489         return 1;
 490         }
 491
 492 int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth)
 493         {
 494 #ifndef OPENSSL_NO_RSA
 495         e->rsa_meth = rsa_meth;
 496         return 1;
 497 #else
 498         return 0;
 499 #endif
 500         }
 501
 502 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth)
 503         {
 504 #ifndef OPENSSL_NO_DSA
 505         e->dsa_meth = dsa_meth;
 506         return 1;
 507 #else
 508         return 0;
 509 #endif
 510         }
 511
 512 int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
 513         {
 514 #ifndef OPENSSL_NO_DH
 515         e->dh_meth = dh_meth;
 516         return 1;
 517 #else
 518         return 0;
 519 #endif
 520         }
 521
 522 int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth)
 523         {
 524         e->rand_meth = rand_meth;
 525         return 1;
 526         }
 527
 528 int ENGINE_set_BN_mod_exp(ENGINE *e, BN_MOD_EXP bn_mod_exp)
 529         {
 530         e->bn_mod_exp = bn_mod_exp;
 531         return 1;
 532         }
 533
 534 int ENGINE_set_BN_mod_exp_crt(ENGINE *e, BN_MOD_EXP_CRT bn_mod_exp_crt)
 535         {
 536         e->bn_mod_exp_crt = bn_mod_exp_crt;
 537         return 1;
 538         }
 539
 540 int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)
 541         {
 542         e->init = init_f;
 543         return 1;
 544         }
 545
 546 int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)
 547         {
 548         e->finish = finish_f;
 549         return 1;
 550         }
 551
 552 int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)
 553         {
 554         e->ctrl = ctrl_f;
 555         return 1;
 556         }
 557
 558 int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f)
 559         {
 560         e->load_privkey = loadpriv_f;
 561         return 1;
 562         }
 563
 564 int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f)
 565         {
 566         e->load_pubkey = loadpub_f;
 567         return 1;
 568         }
 569
 570 int ENGINE_set_flags(ENGINE *e, int flags)
 571         {
 572         e->flags = flags;
 573         return 1;
 574         }
 575
 576 int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)
 577         {
 578         e->cmd_defns = defns;
 579         return 1;
 580         }
 581
 582 int ENGINE_cpy(ENGINE *dest, const ENGINE *src)
 583         {
 584         if(ENGINE_set_id(dest, ENGINE_get_id(src)) &&
 585                         ENGINE_set_name(dest, ENGINE_get_name(src)) &&
 586 #ifndef OPENSSL_NO_RSA
 587                         ENGINE_set_RSA(dest, ENGINE_get_RSA(src)) &&
 588 #endif
 589 #ifndef OPENSSL_NO_RSA
 590                         ENGINE_set_DSA(dest, ENGINE_get_DSA(src)) &&
 591 #endif
 592 #ifndef OPENSSL_NO_RSA
 593                         ENGINE_set_DH(dest, ENGINE_get_DH(src)) &&
 594 #endif
 595                         ENGINE_set_RAND(dest, ENGINE_get_RAND(src)) &&
 596                         ENGINE_set_BN_mod_exp(dest,
 597                                         ENGINE_get_BN_mod_exp(src)) &&
 598                         ENGINE_set_BN_mod_exp_crt(dest,
 599                                         ENGINE_get_BN_mod_exp_crt(src)) &&
 600                         ENGINE_set_init_function(dest,
 601                                         ENGINE_get_init_function(src)) &&
 602                         ENGINE_set_finish_function(dest,
 603                                         ENGINE_get_finish_function(src)) &&
 604                         ENGINE_set_ctrl_function(dest,
 605                                         ENGINE_get_ctrl_function(src)) &&
 606                         ENGINE_set_load_privkey_function(dest,
 607                                         ENGINE_get_load_privkey_function(src)) &&
 608                         ENGINE_set_load_pubkey_function(dest,
 609                                         ENGINE_get_load_pubkey_function(src)) &&
 610                         ENGINE_set_flags(dest, ENGINE_get_flags(src)) &&
 611                         ENGINE_set_cmd_defns(dest, ENGINE_get_cmd_defns(src)))
 612                 return 1;
 613         return 0;
 614         }
 615
 616 const char *ENGINE_get_id(const ENGINE *e)
 617         {
 618         return e->id;
 619         }
 620
 621 const char *ENGINE_get_name(const ENGINE *e)
 622         {
 623         return e->name;
 624         }
 625
 626 const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e)
 627         {
 628         return e->rsa_meth;
 629         }
 630
 631 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e)
 632         {
 633         return e->dsa_meth;
 634         }
 635
 636 const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
 637         {
 638         return e->dh_meth;
 639         }
 640
 641 const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e)
 642         {
 643         return e->rand_meth;
 644         }
 645
 646 BN_MOD_EXP ENGINE_get_BN_mod_exp(const ENGINE *e)
 647         {
 648         return e->bn_mod_exp;
 649         }
 650
 651 BN_MOD_EXP_CRT ENGINE_get_BN_mod_exp_crt(const ENGINE *e)
 652         {
 653         return e->bn_mod_exp_crt;
 654         }
 655
 656 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)
 657         {
 658         return e->init;
 659         }
 660
 661 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)
 662         {
 663         return e->finish;
 664         }
 665
 666 ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)
 667         {
 668         return e->ctrl;
 669         }
 670
 671 ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e)
 672         {
 673         return e->load_privkey;
 674         }
 675
 676 ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e)
 677         {
 678         return e->load_pubkey;
 679         }
 680
 681 int ENGINE_get_flags(const ENGINE *e)
 682         {
 683         return e->flags;
 684         }
 685
 686 const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)
 687         {
 688         return e->cmd_defns;
 689         }