1 /* crypto/engine/engine_lib.c */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
59 #include <openssl/crypto.h>
61 #include "engine_int.h"
62 #include <openssl/engine.h>
64 /* These pointers each have their own "functional reference" when they
65 * are non-NULL. Similarly, when they are retrieved by a call to
66 * ENGINE_get_default_[RSA|DSA|...] the returned pointer is also a
67 * reference and the caller is responsible for freeing that when they
68 * are finished with it (with a call to ENGINE_finish() *NOT* just
69 * ENGINE_free()!!!!!!). */
70 static ENGINE *engine_def_rsa = NULL;
71 static ENGINE *engine_def_dsa = NULL;
72 static ENGINE *engine_def_dh = NULL;
73 static ENGINE *engine_def_rand = NULL;
74 static ENGINE *engine_def_bn_mod_exp = NULL;
75 static ENGINE *engine_def_bn_mod_exp_crt = NULL;
76 /* A static "once-only" flag used to control if/when the above were
77 * initialised to suitable start-up defaults. */
78 static int engine_def_flag = 0;
80 /* When querying a ENGINE-specific control command's 'description', this string
81 * is used if the ENGINE_CMD_DEFN has cmd_desc set to NULL. */
82 static const char *int_no_description = "";
84 /* This is used in certain static utility functions to save code
85 * repetition for per-algorithm functions. */
91 ENGINE_TYPE_BN_MOD_EXP,
92 ENGINE_TYPE_BN_MOD_EXP_CRT
95 static void engine_def_check_util(ENGINE **def, ENGINE *val)
102 /* In a slight break with convention - this static function must be
103 * called *outside* any locking of CRYPTO_LOCK_ENGINE. */
104 static void engine_def_check(void)
109 e = ENGINE_get_first();
111 /* The list is empty ... not much we can do! */
113 /* We have a structural reference, see if getting a functional
114 * reference is possible. This is done to cope with init errors
115 * in the engine - the following locked code does a bunch of
116 * manual "ENGINE_init"s which do *not* allow such an init
117 * error so this is worth doing. */
120 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
121 /* Doing another check here prevents an obvious race
122 * condition because the whole function itself cannot
125 goto skip_set_defaults;
126 /* OK, we got a functional reference, so we get one each
127 * for the defaults too. */
128 engine_def_check_util(&engine_def_rsa, e);
129 engine_def_check_util(&engine_def_dsa, e);
130 engine_def_check_util(&engine_def_dh, e);
131 engine_def_check_util(&engine_def_rand, e);
132 engine_def_check_util(&engine_def_bn_mod_exp, e);
133 engine_def_check_util(&engine_def_bn_mod_exp_crt, e);
136 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
137 /* The "if" needs to be balanced out. */
140 /* We need to balance out the fact we obtained a structural
141 * reference to begin with from ENGINE_get_first(). */
145 /* Initialise a engine type for use (or up its functional reference count
146 * if it's already in use). */
147 int ENGINE_init(ENGINE *e)
153 ENGINEerr(ENGINE_F_ENGINE_INIT,ERR_R_PASSED_NULL_PARAMETER);
156 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
157 if((e->funct_ref == 0) && e->init)
158 /* This is the first functional reference and the engine
159 * requires initialisation so we do it now. */
160 to_return = e->init(e);
163 /* OK, we return a functional reference which is also a
164 * structural reference. */
168 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
172 /* Free a functional reference to a engine type */
173 int ENGINE_finish(ENGINE *e)
179 ENGINEerr(ENGINE_F_ENGINE_FINISH,ERR_R_PASSED_NULL_PARAMETER);
182 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
183 if((e->funct_ref == 1) && e->finish)
185 /* This is the last functional reference and the engine
186 * requires cleanup so we do it now. */
187 to_return = e->finish();
190 /* Cleanup the functional reference which is also a
191 * structural reference. */
195 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
197 /* I'm going to deliberately do a convoluted version of this
198 * piece of code because we don't want "finish" functions
199 * being called inside a locked block of code, if at all
200 * possible. I'd rather have this call take an extra couple
201 * of ticks than have throughput serialised on a externally-
202 * provided callback function that may conceivably never come
205 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
206 /* CODE ALERT: This *IS* supposed to be "=" and NOT "==" :-) */
207 if((to_return = e->finish(e)))
209 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
210 /* Cleanup the functional reference which is also a
211 * structural reference. */
214 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
218 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
223 EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
224 const char *passphrase)
230 ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
231 ERR_R_PASSED_NULL_PARAMETER);
234 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
235 if(e->funct_ref == 0)
237 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
238 ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
239 ENGINE_R_NOT_INITIALISED);
242 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
243 if (!e->load_privkey)
245 ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
246 ENGINE_R_NO_LOAD_FUNCTION);
249 pkey = e->load_privkey(e, key_id, passphrase);
252 ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
253 ENGINE_R_FAILED_LOADING_PRIVATE_KEY);
259 EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
260 const char *passphrase)
266 ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
267 ERR_R_PASSED_NULL_PARAMETER);
270 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
271 if(e->funct_ref == 0)
273 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
274 ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
275 ENGINE_R_NOT_INITIALISED);
278 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
281 ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
282 ENGINE_R_NO_LOAD_FUNCTION);
285 pkey = e->load_pubkey(e, key_id, passphrase);
288 ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
289 ENGINE_R_FAILED_LOADING_PUBLIC_KEY);
295 /* These internal functions handle 'CMD'-related control commands when the
296 * ENGINE in question has asked us to take care of it (ie. the ENGINE did not
297 * set the ENGINE_FLAGS_MANUAL_CMD_CTRL flag. */
299 static int int_ctrl_cmd_is_null(const ENGINE_CMD_DEFN *defn)
301 if((defn->cmd_num == 0) || (defn->cmd_name == NULL))
306 static int int_ctrl_cmd_by_name(const ENGINE_CMD_DEFN *defn, const char *s)
309 while(!int_ctrl_cmd_is_null(defn) && (strcmp(defn->cmd_name, s) != 0))
314 if(int_ctrl_cmd_is_null(defn))
315 /* The given name wasn't found */
320 static int int_ctrl_cmd_by_num(const ENGINE_CMD_DEFN *defn, unsigned int num)
323 /* NB: It is stipulated that 'cmd_defn' lists are ordered by cmd_num. So
324 * our searches don't need to take any longer than necessary. */
325 while(!int_ctrl_cmd_is_null(defn) && (defn->cmd_num < num))
330 if(defn->cmd_num == num)
332 /* The given cmd_num wasn't found */
336 static int int_ctrl_helper(ENGINE *e, int cmd, long i, void *p, void (*f)())
340 /* Take care of the easy one first (eg. it requires no searches) */
341 if(cmd == ENGINE_CTRL_GET_FIRST_CMD_TYPE)
343 if((e->cmd_defns == NULL) || int_ctrl_cmd_is_null(e->cmd_defns))
345 return e->cmd_defns->cmd_num;
347 /* One or two commands require that "p" be a valid string buffer */
348 if((cmd == ENGINE_CTRL_GET_CMD_FROM_NAME) ||
349 (cmd == ENGINE_CTRL_GET_NAME_FROM_CMD) ||
350 (cmd == ENGINE_CTRL_GET_DESC_FROM_CMD))
354 ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
355 ERR_R_PASSED_NULL_PARAMETER);
359 /* Now handle cmd_name -> cmd_num conversion */
360 if(cmd == ENGINE_CTRL_GET_CMD_FROM_NAME)
362 if((e->cmd_defns == NULL) || ((idx = int_ctrl_cmd_by_name(
363 e->cmd_defns, s)) < 0))
365 ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
366 ENGINE_R_INVALID_CMD_NAME);
369 return e->cmd_defns[idx].cmd_num;
371 /* For the rest of the commands, the 'long' argument must specify a
372 * valie command number - so we need to conduct a search. */
373 if((e->cmd_defns == NULL) || ((idx = int_ctrl_cmd_by_num(e->cmd_defns,
374 (unsigned int)i)) < 0))
376 ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
377 ENGINE_R_INVALID_CMD_NUMBER);
380 /* Now the logic splits depending on command type */
383 case ENGINE_CTRL_GET_NEXT_CMD_TYPE:
385 if(int_ctrl_cmd_is_null(e->cmd_defns + idx))
389 return e->cmd_defns[idx].cmd_num;
390 case ENGINE_CTRL_GET_NAME_LEN_FROM_CMD:
391 return strlen(e->cmd_defns[idx].cmd_name);
392 case ENGINE_CTRL_GET_NAME_FROM_CMD:
393 return sprintf(s, "%s", e->cmd_defns[idx].cmd_name);
394 case ENGINE_CTRL_GET_DESC_LEN_FROM_CMD:
395 if(e->cmd_defns[idx].cmd_desc)
396 return strlen(e->cmd_defns[idx].cmd_desc);
397 return strlen(int_no_description);
398 case ENGINE_CTRL_GET_DESC_FROM_CMD:
399 if(e->cmd_defns[idx].cmd_desc)
400 return sprintf(s, "%s", e->cmd_defns[idx].cmd_desc);
401 return sprintf(s, "%s", int_no_description);
402 case ENGINE_CTRL_GET_CMD_FLAGS:
403 return e->cmd_defns[idx].cmd_flags;
405 /* Shouldn't really be here ... */
406 ENGINEerr(ENGINE_F_INT_CTRL_HELPER,ENGINE_R_INTERNAL_LIST_ERROR);
410 int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
412 int ctrl_exists, ref_exists;
415 ENGINEerr(ENGINE_F_ENGINE_CTRL,ERR_R_PASSED_NULL_PARAMETER);
418 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
419 ref_exists = ((e->struct_ref > 0) ? 1 : 0);
420 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
421 ctrl_exists = ((e->ctrl == NULL) ? 0 : 1);
424 ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_REFERENCE);
427 /* Intercept any "root-level" commands before trying to hand them on to
428 * ctrl() handlers. */
431 case ENGINE_CTRL_HAS_CTRL_FUNCTION:
433 case ENGINE_CTRL_GET_FIRST_CMD_TYPE:
434 case ENGINE_CTRL_GET_NEXT_CMD_TYPE:
435 case ENGINE_CTRL_GET_CMD_FROM_NAME:
436 case ENGINE_CTRL_GET_NAME_LEN_FROM_CMD:
437 case ENGINE_CTRL_GET_NAME_FROM_CMD:
438 case ENGINE_CTRL_GET_DESC_LEN_FROM_CMD:
439 case ENGINE_CTRL_GET_DESC_FROM_CMD:
440 case ENGINE_CTRL_GET_CMD_FLAGS:
441 if(ctrl_exists && !(e->flags & ENGINE_FLAGS_MANUAL_CMD_CTRL))
442 return int_ctrl_helper(e,cmd,i,p,f);
445 ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
446 /* For these cmd-related functions, failure is indicated
447 * by a -1 return value (because 0 is used as a valid
448 * return in some places). */
454 /* Anything else requires a ctrl() handler to exist. */
457 ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
460 return e->ctrl(e, cmd, i, p, f);
463 int ENGINE_cmd_is_executable(ENGINE *e, int cmd)
466 if((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, cmd, NULL, NULL)) < 0)
468 ENGINEerr(ENGINE_F_ENGINE_CMD_IS_EXECUTABLE,
469 ENGINE_R_INVALID_CMD_NUMBER);
472 if(!(flags & ENGINE_CMD_FLAG_NO_INPUT) &&
473 !(flags & ENGINE_CMD_FLAG_NUMERIC) &&
474 !(flags & ENGINE_CMD_FLAG_STRING))
479 int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
485 if((e == NULL) || (cmd_name == NULL))
487 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
488 ERR_R_PASSED_NULL_PARAMETER);
491 if((e->ctrl == NULL) || ((num = ENGINE_ctrl(e,
492 ENGINE_CTRL_GET_CMD_FROM_NAME,
493 0, (void *)cmd_name, NULL)) <= 0))
495 /* If the command didn't *have* to be supported, we fake
496 * success. This allows certain settings to be specified for
497 * multiple ENGINEs and only require a change of ENGINE id
498 * (without having to selectively apply settings). Eg. changing
499 * from a hardware device back to the regular software ENGINE
500 * without editing the config file, etc. */
506 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
507 ENGINE_R_INVALID_CMD_NAME);
510 if(!ENGINE_cmd_is_executable(e, num))
512 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
513 ENGINE_R_CMD_NOT_EXECUTABLE);
516 if((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num, NULL, NULL)) < 0)
518 /* Shouldn't happen, given that ENGINE_cmd_is_executable()
519 * returned success. */
520 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
521 ENGINE_R_INTERNAL_LIST_ERROR);
524 /* If the command takes no input, there must be no input. And vice
526 if(flags & ENGINE_CMD_FLAG_NO_INPUT)
530 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
531 ENGINE_R_COMMAND_TAKES_NO_INPUT);
534 /* We deliberately force the result of ENGINE_ctrl() to 0 or 1
535 * rather than returning it as "return data". This is to ensure
536 * usage of these commands is consistent across applications and
537 * that certain applications don't understand it one way, and
539 if(ENGINE_ctrl(e, num, 0, (void *)arg, NULL))
543 /* So, we require input */
546 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
547 ENGINE_R_COMMAND_TAKES_INPUT);
550 /* If it takes string input, that's easy */
551 if(flags & ENGINE_CMD_FLAG_STRING)
553 /* Same explanation as above */
554 if(ENGINE_ctrl(e, num, 0, (void *)arg, NULL))
558 /* If it doesn't take numeric either, then it is unsupported for use in
559 * a config-setting situation, which is what this function is for. This
560 * should never happen though, because ENGINE_cmd_is_executable() was
562 if(!(flags & ENGINE_CMD_FLAG_NUMERIC))
564 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
565 ENGINE_R_INTERNAL_LIST_ERROR);
568 l = strtol(arg, &ptr, 10);
569 if((arg == ptr) || (*ptr != '\0'))
571 ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
572 ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER);
575 /* Force the result of the control command to 0 or 1, for the reasons
576 * mentioned before. */
577 if(ENGINE_ctrl(e, num, l, NULL, NULL))
582 static ENGINE *engine_get_default_type(ENGINE_TYPE t)
586 /* engine_def_check is lean and mean and won't replace any
587 * prior default engines ... so we must ensure that it is always
588 * the first function to get to touch the default values. */
590 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
593 case ENGINE_TYPE_RSA:
594 ret = engine_def_rsa; break;
595 case ENGINE_TYPE_DSA:
596 ret = engine_def_dsa; break;
598 ret = engine_def_dh; break;
599 case ENGINE_TYPE_RAND:
600 ret = engine_def_rand; break;
601 case ENGINE_TYPE_BN_MOD_EXP:
602 ret = engine_def_bn_mod_exp; break;
603 case ENGINE_TYPE_BN_MOD_EXP_CRT:
604 ret = engine_def_bn_mod_exp_crt; break;
606 /* Unforunately we can't do this work outside the lock with a
607 * call to ENGINE_init() because that would leave a race
614 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
618 ENGINE *ENGINE_get_default_RSA(void)
620 return engine_get_default_type(ENGINE_TYPE_RSA);
623 ENGINE *ENGINE_get_default_DSA(void)
625 return engine_get_default_type(ENGINE_TYPE_DSA);
628 ENGINE *ENGINE_get_default_DH(void)
630 return engine_get_default_type(ENGINE_TYPE_DH);
633 ENGINE *ENGINE_get_default_RAND(void)
635 return engine_get_default_type(ENGINE_TYPE_RAND);
638 ENGINE *ENGINE_get_default_BN_mod_exp(void)
640 return engine_get_default_type(ENGINE_TYPE_BN_MOD_EXP);
643 ENGINE *ENGINE_get_default_BN_mod_exp_crt(void)
645 return engine_get_default_type(ENGINE_TYPE_BN_MOD_EXP_CRT);
648 static int engine_set_default_type(ENGINE_TYPE t, ENGINE *e)
654 ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
655 ERR_R_PASSED_NULL_PARAMETER);
658 /* engine_def_check is lean and mean and won't replace any
659 * prior default engines ... so we must ensure that it is always
660 * the first function to get to touch the default values. */
662 /* Attempt to get a functional reference (we need one anyway, but
663 * also, 'e' may be just a structural reference being passed in so
664 * this call may actually be the first). */
667 ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
668 ENGINE_R_INIT_FAILED);
671 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
674 case ENGINE_TYPE_RSA:
675 old = engine_def_rsa;
676 engine_def_rsa = e; break;
677 case ENGINE_TYPE_DSA:
678 old = engine_def_dsa;
679 engine_def_dsa = e; break;
682 engine_def_dh = e; break;
683 case ENGINE_TYPE_RAND:
684 old = engine_def_rand;
685 engine_def_rand = e; break;
686 case ENGINE_TYPE_BN_MOD_EXP:
687 old = engine_def_bn_mod_exp;
688 engine_def_bn_mod_exp = e; break;
689 case ENGINE_TYPE_BN_MOD_EXP_CRT:
690 old = engine_def_bn_mod_exp_crt;
691 engine_def_bn_mod_exp_crt = e; break;
693 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
694 /* If we've replaced a previous value, then we need to remove the
695 * functional reference we had. */
696 if(old && !ENGINE_finish(old))
698 ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
699 ENGINE_R_FINISH_FAILED);
705 int ENGINE_set_default_RSA(ENGINE *e)
707 return engine_set_default_type(ENGINE_TYPE_RSA, e);
710 int ENGINE_set_default_DSA(ENGINE *e)
712 return engine_set_default_type(ENGINE_TYPE_DSA, e);
715 int ENGINE_set_default_DH(ENGINE *e)
717 return engine_set_default_type(ENGINE_TYPE_DH, e);
720 int ENGINE_set_default_RAND(ENGINE *e)
722 return engine_set_default_type(ENGINE_TYPE_RAND, e);
725 int ENGINE_set_default_BN_mod_exp(ENGINE *e)
727 return engine_set_default_type(ENGINE_TYPE_BN_MOD_EXP, e);
730 int ENGINE_set_default_BN_mod_exp_crt(ENGINE *e)
732 return engine_set_default_type(ENGINE_TYPE_BN_MOD_EXP_CRT, e);
735 int ENGINE_set_default(ENGINE *e, unsigned int flags)
737 if((flags & ENGINE_METHOD_RSA) && e->rsa_meth &&
738 !ENGINE_set_default_RSA(e))
740 if((flags & ENGINE_METHOD_DSA) && e->dsa_meth &&
741 !ENGINE_set_default_DSA(e))
743 if((flags & ENGINE_METHOD_DH) && e->dh_meth &&
744 !ENGINE_set_default_DH(e))
746 if((flags & ENGINE_METHOD_RAND) && e->rand_meth &&
747 !ENGINE_set_default_RAND(e))
749 if((flags & ENGINE_METHOD_BN_MOD_EXP) && e->bn_mod_exp &&
750 !ENGINE_set_default_BN_mod_exp(e))
752 if((flags & ENGINE_METHOD_BN_MOD_EXP_CRT) && e->bn_mod_exp_crt &&
753 !ENGINE_set_default_BN_mod_exp_crt(e))