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5270e702 RL |
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 | ||
81 | /* These static functions starting with a lower case "engine_" always | |
82 | * take place when CRYPTO_LOCK_ENGINE has been locked up. */ | |
83 | static int engine_list_add(ENGINE *e) | |
84 | { | |
85 | int conflict = 0; | |
86 | ENGINE *iterator = NULL; | |
87 | ||
88 | if(e == NULL) | |
89 | { | |
90 | ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
91 | ERR_R_PASSED_NULL_PARAMETER); | |
92 | return 0; | |
93 | } | |
94 | iterator = engine_list_head; | |
95 | while(iterator && !conflict) | |
96 | { | |
97 | conflict = (strcmp(iterator->id, e->id) == 0); | |
98 | iterator = iterator->next; | |
99 | } | |
100 | if(conflict) | |
101 | { | |
102 | ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
103 | ENGINE_R_CONFLICTING_ENGINE_ID); | |
104 | return 0; | |
105 | } | |
106 | if(engine_list_head == NULL) | |
107 | { | |
108 | /* We are adding to an empty list. */ | |
109 | if(engine_list_tail) | |
110 | { | |
111 | ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
112 | ENGINE_R_INTERNAL_LIST_ERROR); | |
113 | return 0; | |
114 | } | |
115 | engine_list_head = e; | |
116 | e->prev = NULL; | |
117 | } | |
118 | else | |
119 | { | |
120 | /* We are adding to the tail of an existing list. */ | |
121 | if((engine_list_tail == NULL) || | |
122 | (engine_list_tail->next != NULL)) | |
123 | { | |
124 | ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
125 | ENGINE_R_INTERNAL_LIST_ERROR); | |
126 | return 0; | |
127 | } | |
128 | engine_list_tail->next = e; | |
129 | e->prev = engine_list_tail; | |
130 | } | |
131 | /* Having the engine in the list assumes a structural | |
132 | * reference. */ | |
133 | e->struct_ref++; | |
134 | /* However it came to be, e is the last item in the list. */ | |
135 | engine_list_tail = e; | |
136 | e->next = NULL; | |
137 | return 1; | |
138 | } | |
139 | ||
140 | static int engine_list_remove(ENGINE *e) | |
141 | { | |
142 | ENGINE *iterator; | |
143 | ||
144 | if(e == NULL) | |
145 | { | |
146 | ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, | |
147 | ERR_R_PASSED_NULL_PARAMETER); | |
148 | return 0; | |
149 | } | |
150 | /* We need to check that e is in our linked list! */ | |
151 | iterator = engine_list_head; | |
152 | while(iterator && (iterator != e)) | |
153 | iterator = iterator->next; | |
154 | if(iterator == NULL) | |
155 | { | |
156 | ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, | |
157 | ENGINE_R_ENGINE_IS_NOT_IN_LIST); | |
158 | return 0; | |
159 | } | |
160 | /* un-link e from the chain. */ | |
161 | if(e->next) | |
162 | e->next->prev = e->prev; | |
163 | if(e->prev) | |
164 | e->prev->next = e->next; | |
165 | /* Correct our head/tail if necessary. */ | |
166 | if(engine_list_head == e) | |
167 | engine_list_head = e->next; | |
168 | if(engine_list_tail == e) | |
169 | engine_list_tail = e->prev; | |
170 | /* remove our structural reference. */ | |
171 | e->struct_ref--; | |
172 | return 1; | |
173 | } | |
174 | ||
175 | /* This check always takes place with CRYPTO_LOCK_ENGINE locked up | |
176 | * so we're synchronised, but we can't call anything that tries to | |
177 | * lock it again! :-) NB: For convenience (and code-clarity) we | |
178 | * don't output errors for failures of the engine_list_add function | |
179 | * as it will generate errors itself. */ | |
180 | static int engine_internal_check(void) | |
181 | { | |
182 | if(engine_list_flag) | |
183 | return 1; | |
184 | /* This is our first time up, we need to populate the list | |
185 | * with our statically compiled-in engines. */ | |
186 | if(!engine_list_add(ENGINE_openssl())) | |
187 | return 0; | |
5270e702 RL |
188 | engine_list_flag = 1; |
189 | return 1; | |
190 | } | |
191 | ||
192 | /* Get the first/last "ENGINE" type available. */ | |
193 | ENGINE *ENGINE_get_first(void) | |
194 | { | |
195 | ENGINE *ret = NULL; | |
196 | ||
197 | CRYPTO_r_lock(CRYPTO_LOCK_ENGINE); | |
198 | if(engine_internal_check()) | |
199 | { | |
200 | ret = engine_list_head; | |
201 | if(ret) | |
202 | ret->struct_ref++; | |
203 | } | |
204 | CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE); | |
205 | return ret; | |
206 | } | |
207 | ENGINE *ENGINE_get_last(void) | |
208 | { | |
209 | ENGINE *ret = NULL; | |
210 | ||
211 | CRYPTO_r_lock(CRYPTO_LOCK_ENGINE); | |
212 | if(engine_internal_check()) | |
213 | { | |
214 | ret = engine_list_tail; | |
215 | if(ret) | |
216 | ret->struct_ref++; | |
217 | } | |
218 | CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ | |
223 | ENGINE *ENGINE_get_next(ENGINE *e) | |
224 | { | |
225 | ENGINE *ret = NULL; | |
226 | if(e == NULL) | |
227 | { | |
228 | ENGINEerr(ENGINE_F_ENGINE_GET_NEXT, | |
229 | ERR_R_PASSED_NULL_PARAMETER); | |
230 | return 0; | |
231 | } | |
232 | CRYPTO_r_lock(CRYPTO_LOCK_ENGINE); | |
233 | ret = e->next; | |
5270e702 | 234 | if(ret) |
ea3a429e | 235 | /* Return a valid structural refernce to the next ENGINE */ |
5270e702 RL |
236 | ret->struct_ref++; |
237 | CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE); | |
ea3a429e GT |
238 | /* Release the structural reference to the previous ENGINE */ |
239 | ENGINE_free(e); | |
5270e702 RL |
240 | return ret; |
241 | } | |
242 | ENGINE *ENGINE_get_prev(ENGINE *e) | |
243 | { | |
244 | ENGINE *ret = NULL; | |
245 | if(e == NULL) | |
246 | { | |
247 | ENGINEerr(ENGINE_F_ENGINE_GET_PREV, | |
248 | ERR_R_PASSED_NULL_PARAMETER); | |
249 | return 0; | |
250 | } | |
251 | CRYPTO_r_lock(CRYPTO_LOCK_ENGINE); | |
252 | ret = e->prev; | |
5270e702 | 253 | if(ret) |
ea3a429e | 254 | /* Return a valid structural reference to the next ENGINE */ |
5270e702 RL |
255 | ret->struct_ref++; |
256 | CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE); | |
ea3a429e GT |
257 | /* Release the structural reference to the previous ENGINE */ |
258 | ENGINE_free(e); | |
5270e702 RL |
259 | return ret; |
260 | } | |
261 | ||
262 | /* Add another "ENGINE" type into the list. */ | |
263 | int ENGINE_add(ENGINE *e) | |
264 | { | |
265 | int to_return = 1; | |
266 | if(e == NULL) | |
267 | { | |
268 | ENGINEerr(ENGINE_F_ENGINE_ADD, | |
269 | ERR_R_PASSED_NULL_PARAMETER); | |
270 | return 0; | |
271 | } | |
272 | if((e->id == NULL) || (e->name == NULL)) | |
273 | { | |
274 | ENGINEerr(ENGINE_F_ENGINE_ADD, | |
275 | ENGINE_R_ID_OR_NAME_MISSING); | |
276 | } | |
277 | CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
278 | if(!engine_internal_check() || !engine_list_add(e)) | |
279 | { | |
280 | ENGINEerr(ENGINE_F_ENGINE_ADD, | |
281 | ENGINE_R_INTERNAL_LIST_ERROR); | |
282 | to_return = 0; | |
283 | } | |
284 | CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
285 | return to_return; | |
286 | } | |
287 | ||
288 | /* Remove an existing "ENGINE" type from the array. */ | |
289 | int ENGINE_remove(ENGINE *e) | |
290 | { | |
291 | int to_return = 1; | |
292 | if(e == NULL) | |
293 | { | |
294 | ENGINEerr(ENGINE_F_ENGINE_REMOVE, | |
295 | ERR_R_PASSED_NULL_PARAMETER); | |
296 | return 0; | |
297 | } | |
298 | CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
299 | if(!engine_internal_check() || !engine_list_remove(e)) | |
300 | { | |
301 | ENGINEerr(ENGINE_F_ENGINE_REMOVE, | |
302 | ENGINE_R_INTERNAL_LIST_ERROR); | |
303 | to_return = 0; | |
304 | } | |
305 | CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
306 | return to_return; | |
307 | } | |
308 | ||
309 | ENGINE *ENGINE_by_id(const char *id) | |
310 | { | |
311 | ENGINE *iterator = NULL; | |
312 | if(id == NULL) | |
313 | { | |
314 | ENGINEerr(ENGINE_F_ENGINE_BY_ID, | |
315 | ERR_R_PASSED_NULL_PARAMETER); | |
316 | return NULL; | |
317 | } | |
318 | CRYPTO_r_lock(CRYPTO_LOCK_ENGINE); | |
319 | if(!engine_internal_check()) | |
320 | ENGINEerr(ENGINE_F_ENGINE_BY_ID, | |
321 | ENGINE_R_INTERNAL_LIST_ERROR); | |
322 | else | |
323 | { | |
324 | iterator = engine_list_head; | |
325 | while(iterator && (strcmp(id, iterator->id) != 0)) | |
326 | iterator = iterator->next; | |
327 | if(iterator) | |
328 | /* We need to return a structural reference */ | |
329 | iterator->struct_ref++; | |
330 | } | |
331 | CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE); | |
332 | if(iterator == NULL) | |
333 | ENGINEerr(ENGINE_F_ENGINE_BY_ID, | |
334 | ENGINE_R_NO_SUCH_ENGINE); | |
335 | return iterator; | |
336 | } | |
337 | ||
5270e702 RL |
338 | ENGINE *ENGINE_new(void) |
339 | { | |
340 | ENGINE *ret; | |
341 | ||
342 | ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE)); | |
343 | if(ret == NULL) | |
344 | { | |
345 | ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE); | |
346 | return NULL; | |
347 | } | |
348 | memset(ret, 0, sizeof(ENGINE)); | |
349 | ret->flags = ENGINE_FLAGS_MALLOCED; | |
350 | ret->struct_ref = 1; | |
351 | return ret; | |
352 | } | |
5270e702 RL |
353 | |
354 | int ENGINE_free(ENGINE *e) | |
355 | { | |
356 | int i; | |
357 | ||
358 | if(e == NULL) | |
359 | { | |
360 | ENGINEerr(ENGINE_F_ENGINE_FREE, | |
361 | ERR_R_PASSED_NULL_PARAMETER); | |
362 | return 0; | |
363 | } | |
364 | i = CRYPTO_add(&e->struct_ref,-1,CRYPTO_LOCK_ENGINE); | |
365 | #ifdef REF_PRINT | |
366 | REF_PRINT("ENGINE",e); | |
367 | #endif | |
368 | if (i > 0) return 1; | |
369 | #ifdef REF_CHECK | |
370 | if (i < 0) | |
371 | { | |
372 | fprintf(stderr,"ENGINE_free, bad reference count\n"); | |
373 | abort(); | |
374 | } | |
375 | #endif | |
376 | if(e->flags & ENGINE_FLAGS_MALLOCED) | |
377 | OPENSSL_free(e); | |
378 | return 1; | |
379 | } | |
380 | ||
381 | int ENGINE_set_id(ENGINE *e, const char *id) | |
382 | { | |
383 | if((e == NULL) || (id == NULL)) | |
384 | { | |
385 | ENGINEerr(ENGINE_F_ENGINE_SET_ID, | |
386 | ERR_R_PASSED_NULL_PARAMETER); | |
387 | return 0; | |
388 | } | |
389 | e->id = id; | |
390 | return 1; | |
391 | } | |
392 | ||
393 | int ENGINE_set_name(ENGINE *e, const char *name) | |
394 | { | |
395 | if((e == NULL) || (name == NULL)) | |
396 | { | |
397 | ENGINEerr(ENGINE_F_ENGINE_SET_NAME, | |
398 | ERR_R_PASSED_NULL_PARAMETER); | |
399 | return 0; | |
400 | } | |
401 | e->name = name; | |
402 | return 1; | |
403 | } | |
404 | ||
10e473e9 | 405 | int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth) |
5270e702 RL |
406 | { |
407 | if((e == NULL) || (rsa_meth == NULL)) | |
408 | { | |
409 | ENGINEerr(ENGINE_F_ENGINE_SET_RSA, | |
410 | ERR_R_PASSED_NULL_PARAMETER); | |
411 | return 0; | |
412 | } | |
413 | e->rsa_meth = rsa_meth; | |
414 | return 1; | |
415 | } | |
416 | ||
a4aba800 | 417 | int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth) |
5270e702 RL |
418 | { |
419 | if((e == NULL) || (dsa_meth == NULL)) | |
420 | { | |
421 | ENGINEerr(ENGINE_F_ENGINE_SET_DSA, | |
422 | ERR_R_PASSED_NULL_PARAMETER); | |
423 | return 0; | |
424 | } | |
425 | e->dsa_meth = dsa_meth; | |
426 | return 1; | |
427 | } | |
428 | ||
f971ccb2 | 429 | int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth) |
5270e702 RL |
430 | { |
431 | if((e == NULL) || (dh_meth == NULL)) | |
432 | { | |
433 | ENGINEerr(ENGINE_F_ENGINE_SET_DH, | |
434 | ERR_R_PASSED_NULL_PARAMETER); | |
435 | return 0; | |
436 | } | |
437 | e->dh_meth = dh_meth; | |
438 | return 1; | |
439 | } | |
440 | ||
441 | int ENGINE_set_RAND(ENGINE *e, RAND_METHOD *rand_meth) | |
442 | { | |
443 | if((e == NULL) || (rand_meth == NULL)) | |
444 | { | |
445 | ENGINEerr(ENGINE_F_ENGINE_SET_RAND, | |
446 | ERR_R_PASSED_NULL_PARAMETER); | |
447 | return 0; | |
448 | } | |
449 | e->rand_meth = rand_meth; | |
450 | return 1; | |
451 | } | |
452 | ||
453 | int ENGINE_set_BN_mod_exp(ENGINE *e, BN_MOD_EXP bn_mod_exp) | |
454 | { | |
455 | if((e == NULL) || (bn_mod_exp == NULL)) | |
456 | { | |
457 | ENGINEerr(ENGINE_F_ENGINE_SET_BN_MOD_EXP, | |
458 | ERR_R_PASSED_NULL_PARAMETER); | |
459 | return 0; | |
460 | } | |
461 | e->bn_mod_exp = bn_mod_exp; | |
462 | return 1; | |
463 | } | |
464 | ||
465 | int ENGINE_set_BN_mod_exp_crt(ENGINE *e, BN_MOD_EXP_CRT bn_mod_exp_crt) | |
466 | { | |
467 | if((e == NULL) || (bn_mod_exp_crt == NULL)) | |
468 | { | |
469 | ENGINEerr(ENGINE_F_ENGINE_SET_BN_MOD_EXP_CRT, | |
470 | ERR_R_PASSED_NULL_PARAMETER); | |
471 | return 0; | |
472 | } | |
473 | e->bn_mod_exp_crt = bn_mod_exp_crt; | |
474 | return 1; | |
475 | } | |
476 | ||
477 | int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f) | |
478 | { | |
479 | if((e == NULL) || (init_f == NULL)) | |
480 | { | |
481 | ENGINEerr(ENGINE_F_ENGINE_SET_INIT_FUNCTION, | |
482 | ERR_R_PASSED_NULL_PARAMETER); | |
483 | return 0; | |
484 | } | |
485 | e->init = init_f; | |
486 | return 1; | |
487 | } | |
488 | ||
489 | int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f) | |
490 | { | |
491 | if((e == NULL) || (finish_f == NULL)) | |
492 | { | |
493 | ENGINEerr(ENGINE_F_ENGINE_SET_FINISH_FUNCTION, | |
494 | ERR_R_PASSED_NULL_PARAMETER); | |
495 | return 0; | |
496 | } | |
497 | e->finish = finish_f; | |
498 | return 1; | |
499 | } | |
500 | ||
501 | int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f) | |
502 | { | |
503 | if((e == NULL) || (ctrl_f == NULL)) | |
504 | { | |
505 | ENGINEerr(ENGINE_F_ENGINE_SET_CTRL_FUNCTION, | |
506 | ERR_R_PASSED_NULL_PARAMETER); | |
507 | return 0; | |
508 | } | |
509 | e->ctrl = ctrl_f; | |
510 | return 1; | |
511 | } | |
512 | ||
513 | const char *ENGINE_get_id(ENGINE *e) | |
514 | { | |
515 | if(e == NULL) | |
516 | { | |
517 | ENGINEerr(ENGINE_F_ENGINE_GET_ID, | |
518 | ERR_R_PASSED_NULL_PARAMETER); | |
519 | return 0; | |
520 | } | |
521 | return e->id; | |
522 | } | |
523 | ||
524 | const char *ENGINE_get_name(ENGINE *e) | |
525 | { | |
526 | if(e == NULL) | |
527 | { | |
528 | ENGINEerr(ENGINE_F_ENGINE_GET_NAME, | |
529 | ERR_R_PASSED_NULL_PARAMETER); | |
530 | return 0; | |
531 | } | |
532 | return e->name; | |
533 | } | |
534 | ||
10e473e9 | 535 | const RSA_METHOD *ENGINE_get_RSA(ENGINE *e) |
5270e702 RL |
536 | { |
537 | if(e == NULL) | |
538 | { | |
539 | ENGINEerr(ENGINE_F_ENGINE_GET_RSA, | |
540 | ERR_R_PASSED_NULL_PARAMETER); | |
541 | return NULL; | |
542 | } | |
543 | return e->rsa_meth; | |
544 | } | |
545 | ||
a4aba800 | 546 | const DSA_METHOD *ENGINE_get_DSA(ENGINE *e) |
5270e702 RL |
547 | { |
548 | if(e == NULL) | |
549 | { | |
550 | ENGINEerr(ENGINE_F_ENGINE_GET_DSA, | |
551 | ERR_R_PASSED_NULL_PARAMETER); | |
552 | return NULL; | |
553 | } | |
554 | return e->dsa_meth; | |
555 | } | |
556 | ||
f971ccb2 | 557 | const DH_METHOD *ENGINE_get_DH(ENGINE *e) |
5270e702 RL |
558 | { |
559 | if(e == NULL) | |
560 | { | |
561 | ENGINEerr(ENGINE_F_ENGINE_GET_DH, | |
562 | ERR_R_PASSED_NULL_PARAMETER); | |
563 | return NULL; | |
564 | } | |
565 | return e->dh_meth; | |
566 | } | |
567 | ||
568 | RAND_METHOD *ENGINE_get_RAND(ENGINE *e) | |
569 | { | |
570 | if(e == NULL) | |
571 | { | |
572 | ENGINEerr(ENGINE_F_ENGINE_GET_RAND, | |
573 | ERR_R_PASSED_NULL_PARAMETER); | |
574 | return NULL; | |
575 | } | |
576 | return e->rand_meth; | |
577 | } | |
578 | ||
579 | BN_MOD_EXP ENGINE_get_BN_mod_exp(ENGINE *e) | |
580 | { | |
581 | if(e == NULL) | |
582 | { | |
583 | ENGINEerr(ENGINE_F_ENGINE_GET_BN_MOD_EXP, | |
584 | ERR_R_PASSED_NULL_PARAMETER); | |
585 | return NULL; | |
586 | } | |
587 | return e->bn_mod_exp; | |
588 | } | |
589 | ||
590 | BN_MOD_EXP_CRT ENGINE_get_BN_mod_exp_crt(ENGINE *e) | |
591 | { | |
592 | if(e == NULL) | |
593 | { | |
594 | ENGINEerr(ENGINE_F_ENGINE_GET_BN_MOD_EXP_CRT, | |
595 | ERR_R_PASSED_NULL_PARAMETER); | |
596 | return NULL; | |
597 | } | |
598 | return e->bn_mod_exp_crt; | |
599 | } | |
600 | ||
601 | ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(ENGINE *e) | |
602 | { | |
603 | if(e == NULL) | |
604 | { | |
605 | ENGINEerr(ENGINE_F_ENGINE_GET_INIT_FUNCTION, | |
606 | ERR_R_PASSED_NULL_PARAMETER); | |
607 | return NULL; | |
608 | } | |
609 | return e->init; | |
610 | } | |
611 | ||
612 | ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(ENGINE *e) | |
613 | { | |
614 | if(e == NULL) | |
615 | { | |
616 | ENGINEerr(ENGINE_F_ENGINE_GET_FINISH_FUNCTION, | |
617 | ERR_R_PASSED_NULL_PARAMETER); | |
618 | return NULL; | |
619 | } | |
620 | return e->finish; | |
621 | } | |
622 | ||
623 | ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(ENGINE *e) | |
624 | { | |
625 | if(e == NULL) | |
626 | { | |
627 | ENGINEerr(ENGINE_F_ENGINE_GET_CTRL_FUNCTION, | |
628 | ERR_R_PASSED_NULL_PARAMETER); | |
629 | return NULL; | |
630 | } | |
631 | return e->ctrl; | |
632 | } | |
633 |