Branch data Line data Source code
1 : : /* crypto/ex_data.c */
2 : :
3 : : /*
4 : : * Overhaul notes;
5 : : *
6 : : * This code is now *mostly* thread-safe. It is now easier to understand in what
7 : : * ways it is safe and in what ways it is not, which is an improvement. Firstly,
8 : : * all per-class stacks and index-counters for ex_data are stored in the same
9 : : * global LHASH table (keyed by class). This hash table uses locking for all
10 : : * access with the exception of CRYPTO_cleanup_all_ex_data(), which must only be
11 : : * called when no other threads can possibly race against it (even if it was
12 : : * locked, the race would mean it's possible the hash table might have been
13 : : * recreated after the cleanup). As classes can only be added to the hash table,
14 : : * and within each class, the stack of methods can only be incremented, the
15 : : * locking mechanics are simpler than they would otherwise be. For example, the
16 : : * new/dup/free ex_data functions will lock the hash table, copy the method
17 : : * pointers it needs from the relevant class, then unlock the hash table before
18 : : * actually applying those method pointers to the task of the new/dup/free
19 : : * operations. As they can't be removed from the method-stack, only
20 : : * supplemented, there's no race conditions associated with using them outside
21 : : * the lock. The get/set_ex_data functions are not locked because they do not
22 : : * involve this global state at all - they operate directly with a previously
23 : : * obtained per-class method index and a particular "ex_data" variable. These
24 : : * variables are usually instantiated per-context (eg. each RSA structure has
25 : : * one) so locking on read/write access to that variable can be locked locally
26 : : * if required (eg. using the "RSA" lock to synchronise access to a
27 : : * per-RSA-structure ex_data variable if required).
28 : : * [Geoff]
29 : : */
30 : :
31 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
32 : : * All rights reserved.
33 : : *
34 : : * This package is an SSL implementation written
35 : : * by Eric Young (eay@cryptsoft.com).
36 : : * The implementation was written so as to conform with Netscapes SSL.
37 : : *
38 : : * This library is free for commercial and non-commercial use as long as
39 : : * the following conditions are aheared to. The following conditions
40 : : * apply to all code found in this distribution, be it the RC4, RSA,
41 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
42 : : * included with this distribution is covered by the same copyright terms
43 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
44 : : *
45 : : * Copyright remains Eric Young's, and as such any Copyright notices in
46 : : * the code are not to be removed.
47 : : * If this package is used in a product, Eric Young should be given attribution
48 : : * as the author of the parts of the library used.
49 : : * This can be in the form of a textual message at program startup or
50 : : * in documentation (online or textual) provided with the package.
51 : : *
52 : : * Redistribution and use in source and binary forms, with or without
53 : : * modification, are permitted provided that the following conditions
54 : : * are met:
55 : : * 1. Redistributions of source code must retain the copyright
56 : : * notice, this list of conditions and the following disclaimer.
57 : : * 2. Redistributions in binary form must reproduce the above copyright
58 : : * notice, this list of conditions and the following disclaimer in the
59 : : * documentation and/or other materials provided with the distribution.
60 : : * 3. All advertising materials mentioning features or use of this software
61 : : * must display the following acknowledgement:
62 : : * "This product includes cryptographic software written by
63 : : * Eric Young (eay@cryptsoft.com)"
64 : : * The word 'cryptographic' can be left out if the rouines from the library
65 : : * being used are not cryptographic related :-).
66 : : * 4. If you include any Windows specific code (or a derivative thereof) from
67 : : * the apps directory (application code) you must include an acknowledgement:
68 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
69 : : *
70 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
71 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
72 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
73 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
74 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
75 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
76 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
77 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
78 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
79 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
80 : : * SUCH DAMAGE.
81 : : *
82 : : * The licence and distribution terms for any publically available version or
83 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
84 : : * copied and put under another distribution licence
85 : : * [including the GNU Public Licence.]
86 : : */
87 : : /* ====================================================================
88 : : * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
89 : : *
90 : : * Redistribution and use in source and binary forms, with or without
91 : : * modification, are permitted provided that the following conditions
92 : : * are met:
93 : : *
94 : : * 1. Redistributions of source code must retain the above copyright
95 : : * notice, this list of conditions and the following disclaimer.
96 : : *
97 : : * 2. Redistributions in binary form must reproduce the above copyright
98 : : * notice, this list of conditions and the following disclaimer in
99 : : * the documentation and/or other materials provided with the
100 : : * distribution.
101 : : *
102 : : * 3. All advertising materials mentioning features or use of this
103 : : * software must display the following acknowledgment:
104 : : * "This product includes software developed by the OpenSSL Project
105 : : * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
106 : : *
107 : : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
108 : : * endorse or promote products derived from this software without
109 : : * prior written permission. For written permission, please contact
110 : : * openssl-core@openssl.org.
111 : : *
112 : : * 5. Products derived from this software may not be called "OpenSSL"
113 : : * nor may "OpenSSL" appear in their names without prior written
114 : : * permission of the OpenSSL Project.
115 : : *
116 : : * 6. Redistributions of any form whatsoever must retain the following
117 : : * acknowledgment:
118 : : * "This product includes software developed by the OpenSSL Project
119 : : * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
120 : : *
121 : : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
122 : : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
123 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
124 : : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
125 : : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
126 : : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
127 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
128 : : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
129 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
130 : : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
131 : : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
132 : : * OF THE POSSIBILITY OF SUCH DAMAGE.
133 : : * ====================================================================
134 : : *
135 : : * This product includes cryptographic software written by Eric Young
136 : : * (eay@cryptsoft.com). This product includes software written by Tim
137 : : * Hudson (tjh@cryptsoft.com).
138 : : *
139 : : */
140 : :
141 : : #include "cryptlib.h"
142 : : #include <openssl/lhash.h>
143 : :
144 : : /* What an "implementation of ex_data functionality" looks like */
145 : : struct st_CRYPTO_EX_DATA_IMPL
146 : : {
147 : : /*********************/
148 : : /* GLOBAL OPERATIONS */
149 : : /* Return a new class index */
150 : : int (*cb_new_class)(void);
151 : : /* Cleanup all state used by the implementation */
152 : : void (*cb_cleanup)(void);
153 : : /************************/
154 : : /* PER-CLASS OPERATIONS */
155 : : /* Get a new method index within a class */
156 : : int (*cb_get_new_index)(int class_index, long argl, void *argp,
157 : : CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
158 : : CRYPTO_EX_free *free_func);
159 : : /* Initialise a new CRYPTO_EX_DATA of a given class */
160 : : int (*cb_new_ex_data)(int class_index, void *obj,
161 : : CRYPTO_EX_DATA *ad);
162 : : /* Duplicate a CRYPTO_EX_DATA of a given class onto a copy */
163 : : int (*cb_dup_ex_data)(int class_index, CRYPTO_EX_DATA *to,
164 : : CRYPTO_EX_DATA *from);
165 : : /* Cleanup a CRYPTO_EX_DATA of a given class */
166 : : void (*cb_free_ex_data)(int class_index, void *obj,
167 : : CRYPTO_EX_DATA *ad);
168 : : };
169 : :
170 : : /* The implementation we use at run-time */
171 : : static const CRYPTO_EX_DATA_IMPL *impl = NULL;
172 : :
173 : : /* To call "impl" functions, use this macro rather than referring to 'impl' directly, eg.
174 : : * EX_IMPL(get_new_index)(...); */
175 : : #define EX_IMPL(a) impl->cb_##a
176 : :
177 : : /* Predeclare the "default" ex_data implementation */
178 : : static int int_new_class(void);
179 : : static void int_cleanup(void);
180 : : static int int_get_new_index(int class_index, long argl, void *argp,
181 : : CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
182 : : CRYPTO_EX_free *free_func);
183 : : static int int_new_ex_data(int class_index, void *obj,
184 : : CRYPTO_EX_DATA *ad);
185 : : static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
186 : : CRYPTO_EX_DATA *from);
187 : : static void int_free_ex_data(int class_index, void *obj,
188 : : CRYPTO_EX_DATA *ad);
189 : : static CRYPTO_EX_DATA_IMPL impl_default =
190 : : {
191 : : int_new_class,
192 : : int_cleanup,
193 : : int_get_new_index,
194 : : int_new_ex_data,
195 : : int_dup_ex_data,
196 : : int_free_ex_data
197 : : };
198 : :
199 : : /* Internal function that checks whether "impl" is set and if not, sets it to
200 : : * the default. */
201 : 3262 : static void impl_check(void)
202 : : {
203 : 3262 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
204 [ + - ]: 3262 : if(!impl)
205 : 3262 : impl = &impl_default;
206 : 3262 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
207 : 3262 : }
208 : : /* A macro wrapper for impl_check that first uses a non-locked test before
209 : : * invoking the function (which checks again inside a lock). */
210 : : #define IMPL_CHECK if(!impl) impl_check();
211 : :
212 : : /* API functions to get/set the "ex_data" implementation */
213 : 0 : const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void)
214 : : {
215 [ # # ]: 0 : IMPL_CHECK
216 : 0 : return impl;
217 : : }
218 : 0 : int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i)
219 : : {
220 : 0 : int toret = 0;
221 : 0 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
222 [ # # ]: 0 : if(!impl)
223 : : {
224 : 0 : impl = i;
225 : 0 : toret = 1;
226 : : }
227 : 0 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
228 : 0 : return toret;
229 : : }
230 : :
231 : : /****************************************************************************/
232 : : /* Interal (default) implementation of "ex_data" support. API functions are
233 : : * further down. */
234 : :
235 : : /* The type that represents what each "class" used to implement locally. A STACK
236 : : * of CRYPTO_EX_DATA_FUNCS plus a index-counter. The 'class_index' is the global
237 : : * value representing the class that is used to distinguish these items. */
238 : : typedef struct st_ex_class_item {
239 : : int class_index;
240 : : STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
241 : : int meth_num;
242 : : } EX_CLASS_ITEM;
243 : :
244 : : /* When assigning new class indexes, this is our counter */
245 : : static int ex_class = CRYPTO_EX_INDEX_USER;
246 : :
247 : : /* The global hash table of EX_CLASS_ITEM items */
248 : : DECLARE_LHASH_OF(EX_CLASS_ITEM);
249 : : static LHASH_OF(EX_CLASS_ITEM) *ex_data = NULL;
250 : :
251 : : /* The callbacks required in the "ex_data" hash table */
252 : 242538 : static unsigned long ex_class_item_hash(const EX_CLASS_ITEM *a)
253 : : {
254 : 121269 : return a->class_index;
255 : : }
256 : 242538 : static IMPLEMENT_LHASH_HASH_FN(ex_class_item, EX_CLASS_ITEM)
257 : :
258 : 192870 : static int ex_class_item_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b)
259 : : {
260 : 96435 : return a->class_index - b->class_index;
261 : : }
262 : 192870 : static IMPLEMENT_LHASH_COMP_FN(ex_class_item, EX_CLASS_ITEM)
263 : :
264 : : /* Internal functions used by the "impl_default" implementation to access the
265 : : * state */
266 : :
267 : 3262 : static int ex_data_check(void)
268 : : {
269 : 3262 : int toret = 1;
270 : 3262 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
271 [ + - ]: 3262 : if(!ex_data
272 [ - + ]: 3262 : && (ex_data = lh_EX_CLASS_ITEM_new()) == NULL)
273 : 0 : toret = 0;
274 : 3262 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
275 : 3262 : return toret;
276 : : }
277 : : /* This macros helps reduce the locking from repeated checks because the
278 : : * ex_data_check() function checks ex_data again inside a lock. */
279 : : #define EX_DATA_CHECK(iffail) if(!ex_data && !ex_data_check()) {iffail}
280 : :
281 : : /* This "inner" callback is used by the callback function that follows it */
282 : 1117 : static void def_cleanup_util_cb(CRYPTO_EX_DATA_FUNCS *funcs)
283 : : {
284 : 1117 : OPENSSL_free(funcs);
285 : 1117 : }
286 : :
287 : : /* This callback is used in lh_doall to destroy all EX_CLASS_ITEM values from
288 : : * "ex_data" prior to the ex_data hash table being itself destroyed. Doesn't do
289 : : * any locking. */
290 : 10782 : static void def_cleanup_cb(void *a_void)
291 : : {
292 : 10782 : EX_CLASS_ITEM *item = (EX_CLASS_ITEM *)a_void;
293 : 10782 : sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, def_cleanup_util_cb);
294 : 10782 : OPENSSL_free(item);
295 : 10782 : }
296 : :
297 : : /* Return the EX_CLASS_ITEM from the "ex_data" hash table that corresponds to a
298 : : * given class. Handles locking. */
299 : 108852 : static EX_CLASS_ITEM *def_get_class(int class_index)
300 : : {
301 : : EX_CLASS_ITEM d, *p, *gen;
302 [ + + ][ + - ]: 108852 : EX_DATA_CHECK(return NULL;)
303 : 108852 : d.class_index = class_index;
304 : 108852 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
305 : 108852 : p = lh_EX_CLASS_ITEM_retrieve(ex_data, &d);
306 [ + + ]: 108852 : if(!p)
307 : : {
308 : 12417 : gen = OPENSSL_malloc(sizeof(EX_CLASS_ITEM));
309 [ + - ]: 12417 : if(gen)
310 : : {
311 : 12417 : gen->class_index = class_index;
312 : 12417 : gen->meth_num = 0;
313 : 12417 : gen->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null();
314 [ - + ]: 12417 : if(!gen->meth)
315 : 0 : OPENSSL_free(gen);
316 : : else
317 : : {
318 : : /* Because we're inside the ex_data lock, the
319 : : * return value from the insert will be NULL */
320 : 12417 : (void)lh_EX_CLASS_ITEM_insert(ex_data, gen);
321 : 12417 : p = gen;
322 : : }
323 : : }
324 : : }
325 : 108852 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
326 [ - + ]: 108852 : if(!p)
327 : 0 : CRYPTOerr(CRYPTO_F_DEF_GET_CLASS,ERR_R_MALLOC_FAILURE);
328 : 108852 : return p;
329 : : }
330 : :
331 : : /* Add a new method to the given EX_CLASS_ITEM and return the corresponding
332 : : * index (or -1 for error). Handles locking. */
333 : 2234 : static int def_add_index(EX_CLASS_ITEM *item, long argl, void *argp,
334 : : CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
335 : : CRYPTO_EX_free *free_func)
336 : : {
337 : 1117 : int toret = -1;
338 : 1117 : CRYPTO_EX_DATA_FUNCS *a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(
339 : : sizeof(CRYPTO_EX_DATA_FUNCS));
340 [ - + ]: 1117 : if(!a)
341 : : {
342 : 0 : CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE);
343 : : return -1;
344 : : }
345 : 1117 : a->argl=argl;
346 : 1117 : a->argp=argp;
347 : 1117 : a->new_func=new_func;
348 : 1117 : a->dup_func=dup_func;
349 : 1117 : a->free_func=free_func;
350 : 1117 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
351 [ + + ]: 2234 : while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num)
352 : : {
353 [ - + ]: 1117 : if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL))
354 : : {
355 : 0 : CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE);
356 : 1117 : OPENSSL_free(a);
357 : : goto err;
358 : : }
359 : : }
360 : 1117 : toret = item->meth_num++;
361 : 1117 : (void)sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, toret, a);
362 : : err:
363 : 1117 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
364 : : return toret;
365 : : }
366 : :
367 : : /**************************************************************/
368 : : /* The functions in the default CRYPTO_EX_DATA_IMPL structure */
369 : :
370 : 0 : static int int_new_class(void)
371 : : {
372 : : int toret;
373 : 0 : CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
374 : 0 : toret = ex_class++;
375 : 0 : CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
376 : 0 : return toret;
377 : : }
378 : :
379 : 1629 : static void int_cleanup(void)
380 : : {
381 [ - + ][ # # ]: 1629 : EX_DATA_CHECK(return;)
382 : 1629 : lh_EX_CLASS_ITEM_doall(ex_data, def_cleanup_cb);
383 : 1629 : lh_EX_CLASS_ITEM_free(ex_data);
384 : 1629 : ex_data = NULL;
385 : 1629 : impl = NULL;
386 : : }
387 : :
388 : 1117 : static int int_get_new_index(int class_index, long argl, void *argp,
389 : : CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
390 : : CRYPTO_EX_free *free_func)
391 : : {
392 : 1117 : EX_CLASS_ITEM *item = def_get_class(class_index);
393 [ + - ]: 1117 : if(!item)
394 : : return -1;
395 : 1117 : return def_add_index(item, argl, argp, new_func, dup_func, free_func);
396 : : }
397 : :
398 : : /* Thread-safe by copying a class's array of "CRYPTO_EX_DATA_FUNCS" entries in
399 : : * the lock, then using them outside the lock. NB: Thread-safety only applies to
400 : : * the global "ex_data" state (ie. class definitions), not thread-safe on 'ad'
401 : : * itself. */
402 : 53874 : static int int_new_ex_data(int class_index, void *obj,
403 : : CRYPTO_EX_DATA *ad)
404 : : {
405 : : int mx,i;
406 : : void *ptr;
407 : 53874 : CRYPTO_EX_DATA_FUNCS **storage = NULL;
408 : 53874 : EX_CLASS_ITEM *item = def_get_class(class_index);
409 [ + - ]: 53874 : if(!item)
410 : : /* error is already set */
411 : : return 0;
412 : 53874 : ad->sk = NULL;
413 : 53874 : CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
414 : 53874 : mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
415 [ + + ]: 53874 : if(mx > 0)
416 : : {
417 : 2248 : storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
418 [ + - ]: 2248 : if(!storage)
419 : : goto skip;
420 [ + + ]: 4596 : for(i = 0; i < mx; i++)
421 : 2348 : storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
422 : : }
423 : : skip:
424 : 53874 : CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
425 [ + - ]: 53874 : if((mx > 0) && !storage)
426 : : {
427 : 0 : CRYPTOerr(CRYPTO_F_INT_NEW_EX_DATA,ERR_R_MALLOC_FAILURE);
428 : 0 : return 0;
429 : : }
430 [ + + ]: 56222 : for(i = 0; i < mx; i++)
431 : : {
432 [ + - ][ - + ]: 2348 : if(storage[i] && storage[i]->new_func)
433 : : {
434 : 0 : ptr = CRYPTO_get_ex_data(ad, i);
435 : 0 : storage[i]->new_func(obj,ptr,ad,i,
436 : : storage[i]->argl,storage[i]->argp);
437 : : }
438 : : }
439 [ + + ]: 53874 : if(storage)
440 : 2248 : OPENSSL_free(storage);
441 : : return 1;
442 : : }
443 : :
444 : : /* Same thread-safety notes as for "int_new_ex_data" */
445 : 0 : static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
446 : : CRYPTO_EX_DATA *from)
447 : : {
448 : : int mx, j, i;
449 : : char *ptr;
450 : 0 : CRYPTO_EX_DATA_FUNCS **storage = NULL;
451 : : EX_CLASS_ITEM *item;
452 [ # # ]: 0 : if(!from->sk)
453 : : /* 'to' should be "blank" which *is* just like 'from' */
454 : : return 1;
455 [ # # ]: 0 : if((item = def_get_class(class_index)) == NULL)
456 : : return 0;
457 : 0 : CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
458 : 0 : mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
459 : 0 : j = sk_void_num(from->sk);
460 [ # # ]: 0 : if(j < mx)
461 : 0 : mx = j;
462 [ # # ]: 0 : if(mx > 0)
463 : : {
464 : 0 : storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
465 [ # # ]: 0 : if(!storage)
466 : : goto skip;
467 [ # # ]: 0 : for(i = 0; i < mx; i++)
468 : 0 : storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
469 : : }
470 : : skip:
471 : 0 : CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
472 [ # # ]: 0 : if((mx > 0) && !storage)
473 : : {
474 : 0 : CRYPTOerr(CRYPTO_F_INT_DUP_EX_DATA,ERR_R_MALLOC_FAILURE);
475 : 0 : return 0;
476 : : }
477 [ # # ]: 0 : for(i = 0; i < mx; i++)
478 : : {
479 : 0 : ptr = CRYPTO_get_ex_data(from, i);
480 [ # # ][ # # ]: 0 : if(storage[i] && storage[i]->dup_func)
481 : 0 : storage[i]->dup_func(to,from,&ptr,i,
482 : : storage[i]->argl,storage[i]->argp);
483 : 0 : CRYPTO_set_ex_data(to,i,ptr);
484 : : }
485 [ # # ]: 0 : if(storage)
486 : 0 : OPENSSL_free(storage);
487 : : return 1;
488 : : }
489 : :
490 : : /* Same thread-safety notes as for "int_new_ex_data" */
491 : 53861 : static void int_free_ex_data(int class_index, void *obj,
492 : : CRYPTO_EX_DATA *ad)
493 : : {
494 : : int mx,i;
495 : : EX_CLASS_ITEM *item;
496 : : void *ptr;
497 : 53861 : CRYPTO_EX_DATA_FUNCS **storage = NULL;
498 [ + - ]: 53861 : if((item = def_get_class(class_index)) == NULL)
499 : : return;
500 : 53861 : CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
501 : 53861 : mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
502 [ + + ]: 53861 : if(mx > 0)
503 : : {
504 : 2248 : storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
505 [ + - ]: 2248 : if(!storage)
506 : : goto skip;
507 [ + + ]: 4798 : for(i = 0; i < mx; i++)
508 : 2550 : storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
509 : : }
510 : : skip:
511 : 53861 : CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
512 [ + - ]: 53861 : if((mx > 0) && !storage)
513 : : {
514 : 0 : CRYPTOerr(CRYPTO_F_INT_FREE_EX_DATA,ERR_R_MALLOC_FAILURE);
515 : 0 : return;
516 : : }
517 [ + + ]: 56411 : for(i = 0; i < mx; i++)
518 : : {
519 [ + - ][ - + ]: 2550 : if(storage[i] && storage[i]->free_func)
520 : : {
521 : 0 : ptr = CRYPTO_get_ex_data(ad,i);
522 : 0 : storage[i]->free_func(obj,ptr,ad,i,
523 : : storage[i]->argl,storage[i]->argp);
524 : : }
525 : : }
526 [ + + ]: 53861 : if(storage)
527 : 2248 : OPENSSL_free(storage);
528 [ + + ]: 53861 : if(ad->sk)
529 : : {
530 : 1212 : sk_void_free(ad->sk);
531 : 1212 : ad->sk=NULL;
532 : : }
533 : : }
534 : :
535 : : /********************************************************************/
536 : : /* API functions that defer all "state" operations to the "ex_data"
537 : : * implementation we have set. */
538 : :
539 : : /* Obtain an index for a new class (not the same as getting a new index within
540 : : * an existing class - this is actually getting a new *class*) */
541 : 0 : int CRYPTO_ex_data_new_class(void)
542 : : {
543 [ # # ]: 0 : IMPL_CHECK
544 : 0 : return EX_IMPL(new_class)();
545 : : }
546 : :
547 : : /* Release all "ex_data" state to prevent memory leaks. This can't be made
548 : : * thread-safe without overhauling a lot of stuff, and shouldn't really be
549 : : * called under potential race-conditions anyway (it's for program shutdown
550 : : * after all). */
551 : 1629 : void CRYPTO_cleanup_all_ex_data(void)
552 : : {
553 [ - + ]: 1629 : IMPL_CHECK
554 : 1629 : EX_IMPL(cleanup)();
555 : 1629 : }
556 : :
557 : : /* Inside an existing class, get/register a new index. */
558 : 1117 : int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
559 : : CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
560 : : CRYPTO_EX_free *free_func)
561 : : {
562 : 1117 : int ret = -1;
563 : :
564 [ - + ]: 1117 : IMPL_CHECK
565 : 1117 : ret = EX_IMPL(get_new_index)(class_index,
566 : : argl, argp, new_func, dup_func, free_func);
567 : 1117 : return ret;
568 : : }
569 : :
570 : : /* Initialise a new CRYPTO_EX_DATA for use in a particular class - including
571 : : * calling new() callbacks for each index in the class used by this variable */
572 : 53874 : int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
573 : : {
574 [ + + ]: 53874 : IMPL_CHECK
575 : 53874 : return EX_IMPL(new_ex_data)(class_index, obj, ad);
576 : : }
577 : :
578 : : /* Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks for
579 : : * each index in the class used by this variable */
580 : 0 : int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
581 : : CRYPTO_EX_DATA *from)
582 : : {
583 [ # # ]: 0 : IMPL_CHECK
584 : 0 : return EX_IMPL(dup_ex_data)(class_index, to, from);
585 : : }
586 : :
587 : : /* Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for
588 : : * each index in the class used by this variable */
589 : 53861 : void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
590 : : {
591 [ + + ]: 53861 : IMPL_CHECK
592 : 53861 : EX_IMPL(free_ex_data)(class_index, obj, ad);
593 : 53861 : }
594 : :
595 : : /* For a given CRYPTO_EX_DATA variable, set the value corresponding to a
596 : : * particular index in the class used by this variable */
597 : 1474 : int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val)
598 : : {
599 : : int i;
600 : :
601 [ + + ]: 1474 : if (ad->sk == NULL)
602 : : {
603 [ - + ]: 1212 : if ((ad->sk=sk_void_new_null()) == NULL)
604 : : {
605 : 0 : CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
606 : 0 : return(0);
607 : : }
608 : : }
609 : 1474 : i=sk_void_num(ad->sk);
610 : :
611 [ + + ]: 2948 : while (i <= idx)
612 : : {
613 [ - + ]: 1474 : if (!sk_void_push(ad->sk,NULL))
614 : : {
615 : 0 : CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
616 : 0 : return(0);
617 : : }
618 : 1474 : i++;
619 : : }
620 : 1474 : sk_void_set(ad->sk,idx,val);
621 : 1474 : return(1);
622 : : }
623 : :
624 : : /* For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a
625 : : * particular index in the class used by this variable */
626 : 370 : void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
627 : : {
628 [ + - ]: 370 : if (ad->sk == NULL)
629 : : return(0);
630 [ + - ]: 370 : else if (idx >= sk_void_num(ad->sk))
631 : : return(0);
632 : : else
633 : 370 : return(sk_void_value(ad->sk,idx));
634 : : }
635 : :
636 : : IMPLEMENT_STACK_OF(CRYPTO_EX_DATA_FUNCS)
|
