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Commit | Line | Data |
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aa6bb135 | 1 | /* |
6738bf14 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
435037d4 | 3 | * |
0e9725bc | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
435037d4 | 8 | */ |
58964a49 | 9 | |
ff234405 | 10 | #include "internal/cryptlib_int.h" |
c2e4e5d2 | 11 | #include "internal/thread_once.h" |
58964a49 | 12 | |
1aedc35f | 13 | int do_ex_data_init(OPENSSL_CTX *ctx) |
f7520011 | 14 | { |
1aedc35f MC |
15 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ctx); |
16 | ||
17 | if (global == NULL) | |
eb2b9892 | 18 | return 0; |
1aedc35f MC |
19 | |
20 | global->ex_data_lock = CRYPTO_THREAD_lock_new(); | |
21 | return global->ex_data_lock != NULL; | |
ff234405 MC |
22 | } |
23 | ||
0f113f3e | 24 | /* |
e6390aca | 25 | * Return the EX_CALLBACKS from the |ex_data| array that corresponds to |
7e5363ab | 26 | * a given class. On success, *holds the lock.* |
0f113f3e | 27 | */ |
1aedc35f | 28 | static EX_CALLBACKS *get_and_lock(OPENSSL_CTX *ctx, int class_index) |
0f113f3e | 29 | { |
e6390aca | 30 | EX_CALLBACKS *ip; |
1aedc35f | 31 | OSSL_EX_DATA_GLOBAL *global = NULL; |
7e5363ab RS |
32 | |
33 | if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) { | |
de705824 | 34 | CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_PASSED_INVALID_ARGUMENT); |
7e5363ab RS |
35 | return NULL; |
36 | } | |
37 | ||
1aedc35f | 38 | global = openssl_ctx_get_ex_data_global(ctx); |
f2d20f0b | 39 | if (global == NULL || global->ex_data_lock == NULL) { |
1ee7b8b9 MC |
40 | /* |
41 | * This can happen in normal operation when using CRYPTO_mem_leaks(). | |
42 | * The CRYPTO_mem_leaks() function calls OPENSSL_cleanup() which cleans | |
43 | * up the locks. Subsequently the BIO that CRYPTO_mem_leaks() uses gets | |
44 | * freed, which also attempts to free the ex_data. However | |
45 | * CRYPTO_mem_leaks() ensures that the ex_data is freed early (i.e. | |
46 | * before OPENSSL_cleanup() is called), so if we get here we can safely | |
47 | * ignore this operation. We just treat it as an error. | |
48 | */ | |
49 | return NULL; | |
50 | } | |
51 | ||
1aedc35f | 52 | CRYPTO_THREAD_write_lock(global->ex_data_lock); |
aee6e29f | 53 | ip = &global->ex_data[class_index]; |
7e5363ab | 54 | return ip; |
0f113f3e MC |
55 | } |
56 | ||
e6390aca | 57 | static void cleanup_cb(EX_CALLBACK *funcs) |
0f113f3e MC |
58 | { |
59 | OPENSSL_free(funcs); | |
60 | } | |
3a079997 | 61 | |
0f113f3e | 62 | /* |
7e5363ab RS |
63 | * Release all "ex_data" state to prevent memory leaks. This can't be made |
64 | * thread-safe without overhauling a lot of stuff, and shouldn't really be | |
65 | * called under potential race-conditions anyway (it's for program shutdown | |
66 | * after all). | |
0f113f3e | 67 | */ |
1aedc35f | 68 | void crypto_cleanup_all_ex_data_int(OPENSSL_CTX *ctx) |
0f113f3e | 69 | { |
7e5363ab | 70 | int i; |
1aedc35f MC |
71 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ctx); |
72 | ||
73 | if (global == NULL) | |
74 | return; | |
0f113f3e | 75 | |
7e5363ab | 76 | for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) { |
1aedc35f | 77 | EX_CALLBACKS *ip = &global->ex_data[i]; |
7e5363ab | 78 | |
e6390aca | 79 | sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb); |
7e5363ab | 80 | ip->meth = NULL; |
0f113f3e | 81 | } |
1ee7b8b9 | 82 | |
1aedc35f MC |
83 | CRYPTO_THREAD_lock_free(global->ex_data_lock); |
84 | global->ex_data_lock = NULL; | |
0f113f3e MC |
85 | } |
86 | ||
e6390aca RS |
87 | |
88 | /* | |
89 | * Unregister a new index by replacing the callbacks with no-ops. | |
90 | * Any in-use instances are leaked. | |
91 | */ | |
92 | static void dummy_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx, | |
93 | long argl, void *argp) | |
94 | { | |
95 | } | |
96 | ||
97 | static void dummy_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx, | |
98 | long argl, void *argp) | |
99 | { | |
100 | } | |
101 | ||
3c853776 | 102 | static int dummy_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from, |
e6390aca RS |
103 | void *from_d, int idx, |
104 | long argl, void *argp) | |
105 | { | |
b3c31a65 | 106 | return 1; |
e6390aca RS |
107 | } |
108 | ||
1aedc35f | 109 | int crypto_free_ex_index_ex(OPENSSL_CTX *ctx, int class_index, int idx) |
e6390aca | 110 | { |
1aedc35f | 111 | EX_CALLBACKS *ip = get_and_lock(ctx, class_index); |
e6390aca RS |
112 | EX_CALLBACK *a; |
113 | int toret = 0; | |
1aedc35f MC |
114 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ctx); |
115 | ||
116 | if (global == NULL) | |
97ee8af4 | 117 | return 0; |
e6390aca | 118 | |
1aedc35f | 119 | ip = get_and_lock(ctx, class_index); |
e6390aca RS |
120 | if (ip == NULL) |
121 | return 0; | |
122 | if (idx < 0 || idx >= sk_EX_CALLBACK_num(ip->meth)) | |
123 | goto err; | |
124 | a = sk_EX_CALLBACK_value(ip->meth, idx); | |
125 | if (a == NULL) | |
126 | goto err; | |
127 | a->new_func = dummy_new; | |
128 | a->dup_func = dummy_dup; | |
129 | a->free_func = dummy_free; | |
130 | toret = 1; | |
131 | err: | |
1aedc35f | 132 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
e6390aca RS |
133 | return toret; |
134 | } | |
135 | ||
1aedc35f MC |
136 | int CRYPTO_free_ex_index(int class_index, int idx) |
137 | { | |
138 | return crypto_free_ex_index_ex(NULL, class_index, idx); | |
139 | } | |
140 | ||
0f113f3e | 141 | /* |
e6390aca | 142 | * Register a new index. |
0f113f3e | 143 | */ |
1aedc35f MC |
144 | int crypto_get_ex_new_index_ex(OPENSSL_CTX *ctx, int class_index, long argl, |
145 | void *argp, CRYPTO_EX_new *new_func, | |
146 | CRYPTO_EX_dup *dup_func, | |
147 | CRYPTO_EX_free *free_func) | |
0f113f3e MC |
148 | { |
149 | int toret = -1; | |
e6390aca | 150 | EX_CALLBACK *a; |
1aedc35f MC |
151 | EX_CALLBACKS *ip; |
152 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ctx); | |
7e5363ab | 153 | |
1aedc35f | 154 | if (global == NULL) |
1f760760 | 155 | return -1; |
1aedc35f MC |
156 | |
157 | ip = get_and_lock(ctx, class_index); | |
e6390aca | 158 | if (ip == NULL) |
0f113f3e | 159 | return -1; |
8cab4e9b EK |
160 | |
161 | if (ip->meth == NULL) { | |
162 | ip->meth = sk_EX_CALLBACK_new_null(); | |
163 | /* We push an initial value on the stack because the SSL | |
164 | * "app_data" routines use ex_data index zero. See RT 3710. */ | |
165 | if (ip->meth == NULL | |
166 | || !sk_EX_CALLBACK_push(ip->meth, NULL)) { | |
1aedc35f | 167 | CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX_EX, ERR_R_MALLOC_FAILURE); |
8cab4e9b EK |
168 | goto err; |
169 | } | |
170 | } | |
171 | ||
e6390aca | 172 | a = (EX_CALLBACK *)OPENSSL_malloc(sizeof(*a)); |
90945fa3 | 173 | if (a == NULL) { |
1aedc35f | 174 | CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX_EX, ERR_R_MALLOC_FAILURE); |
7e5363ab | 175 | goto err; |
0f113f3e MC |
176 | } |
177 | a->argl = argl; | |
178 | a->argp = argp; | |
179 | a->new_func = new_func; | |
180 | a->dup_func = dup_func; | |
181 | a->free_func = free_func; | |
3a079997 | 182 | |
e6390aca | 183 | if (!sk_EX_CALLBACK_push(ip->meth, NULL)) { |
1aedc35f | 184 | CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX_EX, ERR_R_MALLOC_FAILURE); |
7e5363ab RS |
185 | OPENSSL_free(a); |
186 | goto err; | |
187 | } | |
e6390aca RS |
188 | toret = sk_EX_CALLBACK_num(ip->meth) - 1; |
189 | (void)sk_EX_CALLBACK_set(ip->meth, toret, a); | |
3a079997 | 190 | |
7e5363ab | 191 | err: |
1aedc35f | 192 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
0f113f3e MC |
193 | return toret; |
194 | } | |
3a079997 | 195 | |
1aedc35f MC |
196 | int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp, |
197 | CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, | |
198 | CRYPTO_EX_free *free_func) | |
199 | { | |
200 | return crypto_get_ex_new_index_ex(NULL, class_index, argl, argp, new_func, | |
201 | dup_func, free_func); | |
202 | } | |
203 | ||
0f113f3e | 204 | /* |
7e5363ab RS |
205 | * Initialise a new CRYPTO_EX_DATA for use in a particular class - including |
206 | * calling new() callbacks for each index in the class used by this variable | |
e6390aca | 207 | * Thread-safe by copying a class's array of "EX_CALLBACK" entries |
7e5363ab RS |
208 | * in the lock, then using them outside the lock. Note this only applies |
209 | * to the global "ex_data" state (ie. class definitions), not 'ad' itself. | |
0f113f3e | 210 | */ |
1aedc35f MC |
211 | int crypto_new_ex_data_ex(OPENSSL_CTX *ctx, int class_index, void *obj, |
212 | CRYPTO_EX_DATA *ad) | |
0f113f3e MC |
213 | { |
214 | int mx, i; | |
215 | void *ptr; | |
e6390aca RS |
216 | EX_CALLBACK **storage = NULL; |
217 | EX_CALLBACK *stack[10]; | |
1aedc35f MC |
218 | EX_CALLBACKS *ip; |
219 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ctx); | |
220 | ||
221 | if (global == NULL) | |
222 | return 0; | |
7e5363ab | 223 | |
1aedc35f | 224 | ip = get_and_lock(ctx, class_index); |
e6390aca | 225 | if (ip == NULL) |
0f113f3e | 226 | return 0; |
7e5363ab | 227 | |
1aedc35f | 228 | ad->ctx = ctx; |
0f113f3e | 229 | ad->sk = NULL; |
7e5363ab | 230 | |
e6390aca | 231 | mx = sk_EX_CALLBACK_num(ip->meth); |
0f113f3e | 232 | if (mx > 0) { |
7e5363ab RS |
233 | if (mx < (int)OSSL_NELEM(stack)) |
234 | storage = stack; | |
235 | else | |
236 | storage = OPENSSL_malloc(sizeof(*storage) * mx); | |
90945fa3 | 237 | if (storage != NULL) |
7e5363ab | 238 | for (i = 0; i < mx; i++) |
e6390aca | 239 | storage[i] = sk_EX_CALLBACK_value(ip->meth, i); |
0f113f3e | 240 | } |
1aedc35f | 241 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
7e5363ab RS |
242 | |
243 | if (mx > 0 && storage == NULL) { | |
1aedc35f | 244 | CRYPTOerr(CRYPTO_F_CRYPTO_NEW_EX_DATA_EX, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
245 | return 0; |
246 | } | |
247 | for (i = 0; i < mx; i++) { | |
23dc8feb | 248 | if (storage[i] != NULL && storage[i]->new_func != NULL) { |
0f113f3e MC |
249 | ptr = CRYPTO_get_ex_data(ad, i); |
250 | storage[i]->new_func(obj, ptr, ad, i, | |
251 | storage[i]->argl, storage[i]->argp); | |
252 | } | |
253 | } | |
7e5363ab RS |
254 | if (storage != stack) |
255 | OPENSSL_free(storage); | |
0f113f3e MC |
256 | return 1; |
257 | } | |
3a079997 | 258 | |
1aedc35f MC |
259 | int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) |
260 | { | |
261 | return crypto_new_ex_data_ex(NULL, class_index, obj, ad); | |
262 | } | |
263 | ||
7e5363ab RS |
264 | /* |
265 | * Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks | |
266 | * for each index in the class used by this variable | |
267 | */ | |
268 | int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, | |
3c853776 | 269 | const CRYPTO_EX_DATA *from) |
0f113f3e MC |
270 | { |
271 | int mx, j, i; | |
b3c31a65 | 272 | void *ptr; |
e6390aca RS |
273 | EX_CALLBACK *stack[10]; |
274 | EX_CALLBACK **storage = NULL; | |
275 | EX_CALLBACKS *ip; | |
b3c31a65 | 276 | int toret = 0; |
1aedc35f MC |
277 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(from->ctx); |
278 | ||
279 | if (global == NULL) | |
280 | return 0; | |
7e5363ab | 281 | |
1aedc35f | 282 | to->ctx = from->ctx; |
7e5363ab RS |
283 | if (from->sk == NULL) |
284 | /* Nothing to copy over */ | |
0f113f3e | 285 | return 1; |
1aedc35f | 286 | if ((ip = get_and_lock(from->ctx, class_index)) == NULL) |
0f113f3e | 287 | return 0; |
7e5363ab | 288 | |
e6390aca | 289 | mx = sk_EX_CALLBACK_num(ip->meth); |
0f113f3e MC |
290 | j = sk_void_num(from->sk); |
291 | if (j < mx) | |
292 | mx = j; | |
293 | if (mx > 0) { | |
7e5363ab RS |
294 | if (mx < (int)OSSL_NELEM(stack)) |
295 | storage = stack; | |
296 | else | |
297 | storage = OPENSSL_malloc(sizeof(*storage) * mx); | |
90945fa3 | 298 | if (storage != NULL) |
7e5363ab | 299 | for (i = 0; i < mx; i++) |
e6390aca | 300 | storage[i] = sk_EX_CALLBACK_value(ip->meth, i); |
0f113f3e | 301 | } |
1aedc35f | 302 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
7e5363ab | 303 | |
b3c31a65 BE |
304 | if (mx == 0) |
305 | return 1; | |
306 | if (storage == NULL) { | |
7e5363ab | 307 | CRYPTOerr(CRYPTO_F_CRYPTO_DUP_EX_DATA, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
308 | return 0; |
309 | } | |
1ee21259 TS |
310 | /* |
311 | * Make sure the ex_data stack is at least |mx| elements long to avoid | |
312 | * issues in the for loop that follows; so go get the |mx|'th element | |
313 | * (if it does not exist CRYPTO_get_ex_data() returns NULL), and assign | |
314 | * to itself. This is normally a no-op; but ensures the stack is the | |
315 | * proper size | |
316 | */ | |
317 | if (!CRYPTO_set_ex_data(to, mx - 1, CRYPTO_get_ex_data(to, mx - 1))) | |
b3c31a65 | 318 | goto err; |
7e5363ab | 319 | |
0f113f3e MC |
320 | for (i = 0; i < mx; i++) { |
321 | ptr = CRYPTO_get_ex_data(from, i); | |
23dc8feb | 322 | if (storage[i] != NULL && storage[i]->dup_func != NULL) |
b3c31a65 BE |
323 | if (!storage[i]->dup_func(to, from, &ptr, i, |
324 | storage[i]->argl, storage[i]->argp)) | |
325 | goto err; | |
0f113f3e MC |
326 | CRYPTO_set_ex_data(to, i, ptr); |
327 | } | |
b3c31a65 BE |
328 | toret = 1; |
329 | err: | |
7e5363ab RS |
330 | if (storage != stack) |
331 | OPENSSL_free(storage); | |
b3c31a65 | 332 | return toret; |
0f113f3e | 333 | } |
3a079997 | 334 | |
7e5363ab RS |
335 | |
336 | /* | |
337 | * Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for | |
338 | * each index in the class used by this variable | |
339 | */ | |
340 | void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) | |
0f113f3e MC |
341 | { |
342 | int mx, i; | |
e6390aca | 343 | EX_CALLBACKS *ip; |
0f113f3e | 344 | void *ptr; |
83b4049a | 345 | EX_CALLBACK *f; |
e6390aca RS |
346 | EX_CALLBACK *stack[10]; |
347 | EX_CALLBACK **storage = NULL; | |
1aedc35f | 348 | OSSL_EX_DATA_GLOBAL *global; |
7e5363ab | 349 | |
1aedc35f MC |
350 | if ((ip = get_and_lock(ad->ctx, class_index)) == NULL) |
351 | goto err; | |
352 | global = openssl_ctx_get_ex_data_global(ad->ctx); | |
353 | if (global == NULL) | |
83b4049a | 354 | goto err; |
7e5363ab | 355 | |
e6390aca | 356 | mx = sk_EX_CALLBACK_num(ip->meth); |
0f113f3e | 357 | if (mx > 0) { |
7e5363ab RS |
358 | if (mx < (int)OSSL_NELEM(stack)) |
359 | storage = stack; | |
360 | else | |
361 | storage = OPENSSL_malloc(sizeof(*storage) * mx); | |
90945fa3 | 362 | if (storage != NULL) |
7e5363ab | 363 | for (i = 0; i < mx; i++) |
e6390aca | 364 | storage[i] = sk_EX_CALLBACK_value(ip->meth, i); |
0f113f3e | 365 | } |
1aedc35f | 366 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
7e5363ab | 367 | |
0f113f3e | 368 | for (i = 0; i < mx; i++) { |
83b4049a BE |
369 | if (storage != NULL) |
370 | f = storage[i]; | |
371 | else { | |
1aedc35f | 372 | CRYPTO_THREAD_write_lock(global->ex_data_lock); |
83b4049a | 373 | f = sk_EX_CALLBACK_value(ip->meth, i); |
1aedc35f | 374 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
83b4049a BE |
375 | } |
376 | if (f != NULL && f->free_func != NULL) { | |
0f113f3e | 377 | ptr = CRYPTO_get_ex_data(ad, i); |
83b4049a | 378 | f->free_func(obj, ptr, ad, i, f->argl, f->argp); |
0f113f3e MC |
379 | } |
380 | } | |
7e5363ab RS |
381 | |
382 | if (storage != stack) | |
383 | OPENSSL_free(storage); | |
83b4049a | 384 | err: |
25aaa98a RS |
385 | sk_void_free(ad->sk); |
386 | ad->sk = NULL; | |
1aedc35f | 387 | ad->ctx = NULL; |
0f113f3e | 388 | } |
3a079997 | 389 | |
e17f5b6a RL |
390 | /* |
391 | * Allocate a given CRYPTO_EX_DATA item using the class specific allocation | |
392 | * function | |
393 | */ | |
394 | int CRYPTO_alloc_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad, | |
395 | int idx) | |
396 | { | |
397 | EX_CALLBACK *f; | |
398 | EX_CALLBACKS *ip; | |
399 | void *curval; | |
1aedc35f MC |
400 | OSSL_EX_DATA_GLOBAL *global = openssl_ctx_get_ex_data_global(ad->ctx); |
401 | ||
402 | if (global == NULL) | |
403 | return 0; | |
e17f5b6a RL |
404 | |
405 | curval = CRYPTO_get_ex_data(ad, idx); | |
406 | ||
407 | /* Already there, no need to allocate */ | |
408 | if (curval != NULL) | |
409 | return 1; | |
410 | ||
1aedc35f | 411 | ip = get_and_lock(ad->ctx, class_index); |
23dc8feb F |
412 | if (ip == NULL) |
413 | return 0; | |
e17f5b6a | 414 | f = sk_EX_CALLBACK_value(ip->meth, idx); |
1aedc35f | 415 | CRYPTO_THREAD_unlock(global->ex_data_lock); |
e17f5b6a RL |
416 | |
417 | /* | |
418 | * This should end up calling CRYPTO_set_ex_data(), which allocates | |
419 | * everything necessary to support placing the new data in the right spot. | |
420 | */ | |
23dc8feb F |
421 | if (f->new_func == NULL) |
422 | return 0; | |
423 | ||
823ee00a | 424 | f->new_func(obj, NULL, ad, idx, f->argl, f->argp); |
e17f5b6a RL |
425 | |
426 | return 1; | |
427 | } | |
428 | ||
0f113f3e MC |
429 | /* |
430 | * For a given CRYPTO_EX_DATA variable, set the value corresponding to a | |
431 | * particular index in the class used by this variable | |
432 | */ | |
dd9d233e | 433 | int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val) |
0f113f3e MC |
434 | { |
435 | int i; | |
436 | ||
437 | if (ad->sk == NULL) { | |
438 | if ((ad->sk = sk_void_new_null()) == NULL) { | |
439 | CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE); | |
7e5363ab | 440 | return 0; |
0f113f3e MC |
441 | } |
442 | } | |
0f113f3e | 443 | |
7e5363ab | 444 | for (i = sk_void_num(ad->sk); i <= idx; ++i) { |
0f113f3e MC |
445 | if (!sk_void_push(ad->sk, NULL)) { |
446 | CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE); | |
7e5363ab | 447 | return 0; |
0f113f3e | 448 | } |
0f113f3e MC |
449 | } |
450 | sk_void_set(ad->sk, idx, val); | |
7e5363ab | 451 | return 1; |
0f113f3e MC |
452 | } |
453 | ||
454 | /* | |
455 | * For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a | |
456 | * particular index in the class used by this variable | |
457 | */ | |
bbbc96a8 | 458 | void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) |
0f113f3e | 459 | { |
7e5363ab RS |
460 | if (ad->sk == NULL || idx >= sk_void_num(ad->sk)) |
461 | return NULL; | |
462 | return sk_void_value(ad->sk, idx); | |
0f113f3e | 463 | } |
1aedc35f MC |
464 | |
465 | OPENSSL_CTX *crypto_ex_data_get_openssl_ctx(const CRYPTO_EX_DATA *ad) | |
466 | { | |
467 | return ad->ctx; | |
468 | } |