1 /* $OpenBSD: ex_data.c,v 1.17 2014/07/11 08:44:47 jsing Exp $ */ 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 <openssl/err.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 /* GLOBAL OPERATIONS */ 148 /* Return a new class index */ 149 int (*cb_new_class)(void); 150 /* Cleanup all state used by the implementation */ 151 void (*cb_cleanup)(void); 152 /************************/ 153 /* PER-CLASS OPERATIONS */ 154 /* Get a new method index within a class */ 155 int (*cb_get_new_index)(int class_index, long argl, void *argp, 156 CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, 157 CRYPTO_EX_free *free_func); 158 /* Initialise a new CRYPTO_EX_DATA of a given class */ 159 int (*cb_new_ex_data)(int class_index, void *obj, 160 CRYPTO_EX_DATA *ad); 161 /* Duplicate a CRYPTO_EX_DATA of a given class onto a copy */ 162 int (*cb_dup_ex_data)(int class_index, CRYPTO_EX_DATA *to, 163 CRYPTO_EX_DATA *from); 164 /* Cleanup a CRYPTO_EX_DATA of a given class */ 165 void (*cb_free_ex_data)(int class_index, void *obj, 166 CRYPTO_EX_DATA *ad); 167 }; 168 169 /* The implementation we use at run-time */ 170 static const CRYPTO_EX_DATA_IMPL *impl = NULL; 171 172 /* To call "impl" functions, use this macro rather than referring to 'impl' directly, eg. 173 * EX_IMPL(get_new_index)(...); 174 */ 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); 189 190 static CRYPTO_EX_DATA_IMPL impl_default = { 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 static void 202 impl_check(void) 203 { 204 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 205 if (!impl) 206 impl = &impl_default; 207 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 208 } 209 /* A macro wrapper for impl_check that first uses a non-locked test before 210 * invoking the function (which checks again inside a lock). */ 211 #define IMPL_CHECK if(!impl) impl_check(); 212 213 /* API functions to get/set the "ex_data" implementation */ 214 const CRYPTO_EX_DATA_IMPL * 215 CRYPTO_get_ex_data_implementation(void) 216 { 217 IMPL_CHECK 218 return impl; 219 } 220 221 int 222 CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i) 223 { 224 int toret = 0; 225 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 226 if (!impl) { 227 impl = i; 228 toret = 1; 229 } 230 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 231 return toret; 232 } 233 234 /****************************************************************************/ 235 /* Interal (default) implementation of "ex_data" support. API functions are 236 * further down. */ 237 238 /* The type that represents what each "class" used to implement locally. A STACK 239 * of CRYPTO_EX_DATA_FUNCS plus a index-counter. The 'class_index' is the global 240 * value representing the class that is used to distinguish these items. */ 241 typedef struct st_ex_class_item { 242 int class_index; 243 STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth; 244 int meth_num; 245 } EX_CLASS_ITEM; 246 247 /* When assigning new class indexes, this is our counter */ 248 static int ex_class = CRYPTO_EX_INDEX_USER; 249 250 /* The global hash table of EX_CLASS_ITEM items */ 251 DECLARE_LHASH_OF(EX_CLASS_ITEM); 252 static LHASH_OF(EX_CLASS_ITEM) *ex_data = NULL; 253 254 /* The callbacks required in the "ex_data" hash table */ 255 static unsigned long 256 ex_class_item_hash(const EX_CLASS_ITEM *a) 257 { 258 return a->class_index; 259 } 260 261 static IMPLEMENT_LHASH_HASH_FN(ex_class_item, EX_CLASS_ITEM) 262 263 static int 264 ex_class_item_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b) 265 { 266 return a->class_index - b->class_index; 267 } 268 269 static IMPLEMENT_LHASH_COMP_FN(ex_class_item, EX_CLASS_ITEM) 270 271 /* Internal functions used by the "impl_default" implementation to access the 272 * state */ 273 274 static int 275 ex_data_check(void) 276 { 277 int toret = 1; 278 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 279 if (!ex_data && 280 (ex_data = lh_EX_CLASS_ITEM_new()) == NULL) 281 toret = 0; 282 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 283 return toret; 284 } 285 /* This macros helps reduce the locking from repeated checks because the 286 * ex_data_check() function checks ex_data again inside a lock. */ 287 #define EX_DATA_CHECK(iffail) if(!ex_data && !ex_data_check()) {iffail} 288 289 /* This "inner" callback is used by the callback function that follows it */ 290 static void 291 def_cleanup_util_cb(CRYPTO_EX_DATA_FUNCS *funcs) 292 { 293 free(funcs); 294 } 295 296 /* This callback is used in lh_doall to destroy all EX_CLASS_ITEM values from 297 * "ex_data" prior to the ex_data hash table being itself destroyed. Doesn't do 298 * any locking. */ 299 static void 300 def_cleanup_cb(void *a_void) 301 { 302 EX_CLASS_ITEM *item = (EX_CLASS_ITEM *)a_void; 303 sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, def_cleanup_util_cb); 304 free(item); 305 } 306 307 /* Return the EX_CLASS_ITEM from the "ex_data" hash table that corresponds to a 308 * given class. Handles locking. */ 309 static EX_CLASS_ITEM * 310 def_get_class(int class_index) 311 { 312 EX_CLASS_ITEM d, *p, *gen; 313 EX_DATA_CHECK(return NULL;) 314 d.class_index = class_index; 315 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 316 p = lh_EX_CLASS_ITEM_retrieve(ex_data, &d); 317 if (!p) { 318 gen = malloc(sizeof(EX_CLASS_ITEM)); 319 if (gen) { 320 gen->class_index = class_index; 321 gen->meth_num = 0; 322 gen->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null(); 323 if (!gen->meth) 324 free(gen); 325 else { 326 /* Because we're inside the ex_data lock, the 327 * return value from the insert will be NULL */ 328 (void)lh_EX_CLASS_ITEM_insert(ex_data, gen); 329 p = gen; 330 } 331 } 332 } 333 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 334 if (!p) 335 CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE); 336 return p; 337 } 338 339 /* Add a new method to the given EX_CLASS_ITEM and return the corresponding 340 * index (or -1 for error). Handles locking. */ 341 static int 342 def_add_index(EX_CLASS_ITEM *item, long argl, void *argp, 343 CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 344 { 345 int toret = -1; 346 CRYPTO_EX_DATA_FUNCS *a = malloc(sizeof(CRYPTO_EX_DATA_FUNCS)); 347 348 if (!a) { 349 CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX, ERR_R_MALLOC_FAILURE); 350 return -1; 351 } 352 a->argl = argl; 353 a->argp = argp; 354 a->new_func = new_func; 355 a->dup_func = dup_func; 356 a->free_func = free_func; 357 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 358 while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num) { 359 if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL)) { 360 CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX, ERR_R_MALLOC_FAILURE); 361 free(a); 362 goto err; 363 } 364 } 365 toret = item->meth_num++; 366 (void)sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, toret, a); 367 err: 368 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 369 return toret; 370 } 371 372 /**************************************************************/ 373 /* The functions in the default CRYPTO_EX_DATA_IMPL structure */ 374 375 static int 376 int_new_class(void) 377 { 378 int toret; 379 380 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 381 toret = ex_class++; 382 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 383 return toret; 384 } 385 386 static void 387 int_cleanup(void) 388 { 389 EX_DATA_CHECK(return;) 390 lh_EX_CLASS_ITEM_doall(ex_data, def_cleanup_cb); 391 lh_EX_CLASS_ITEM_free(ex_data); 392 ex_data = NULL; 393 impl = NULL; 394 } 395 396 static int 397 int_get_new_index(int class_index, long argl, void *argp, 398 CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, 399 CRYPTO_EX_free *free_func) 400 { 401 EX_CLASS_ITEM *item = def_get_class(class_index); 402 403 if (!item) 404 return -1; 405 return def_add_index(item, argl, argp, new_func, dup_func, free_func); 406 } 407 408 /* Thread-safe by copying a class's array of "CRYPTO_EX_DATA_FUNCS" entries in 409 * the lock, then using them outside the lock. NB: Thread-safety only applies to 410 * the global "ex_data" state (ie. class definitions), not thread-safe on 'ad' 411 * itself. */ 412 static int 413 int_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 414 { 415 int mx, i; 416 void *ptr; 417 CRYPTO_EX_DATA_FUNCS **storage = NULL; 418 EX_CLASS_ITEM *item = def_get_class(class_index); 419 420 if (!item) 421 /* error is already set */ 422 return 0; 423 ad->sk = NULL; 424 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 425 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 426 if (mx > 0) { 427 storage = reallocarray(NULL, mx, sizeof(CRYPTO_EX_DATA_FUNCS*)); 428 if (!storage) 429 goto skip; 430 for (i = 0; i < mx; i++) 431 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value( 432 item->meth, i); 433 } 434 skip: 435 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 436 if ((mx > 0) && !storage) { 437 CRYPTOerr(CRYPTO_F_INT_NEW_EX_DATA, ERR_R_MALLOC_FAILURE); 438 return 0; 439 } 440 for (i = 0; i < mx; i++) { 441 if (storage[i] && storage[i]->new_func) { 442 ptr = CRYPTO_get_ex_data(ad, i); 443 storage[i]->new_func(obj, ptr, ad, i, 444 storage[i]->argl, storage[i]->argp); 445 } 446 } 447 free(storage); 448 return 1; 449 } 450 451 /* Same thread-safety notes as for "int_new_ex_data" */ 452 static int 453 int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from) 454 { 455 int mx, j, i; 456 char *ptr; 457 CRYPTO_EX_DATA_FUNCS **storage = NULL; 458 EX_CLASS_ITEM *item; 459 460 if (!from->sk) 461 /* 'to' should be "blank" which *is* just like 'from' */ 462 return 1; 463 if ((item = def_get_class(class_index)) == NULL) 464 return 0; 465 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 466 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 467 j = sk_void_num(from->sk); 468 if (j < mx) 469 mx = j; 470 if (mx > 0) { 471 storage = reallocarray(NULL, mx, sizeof(CRYPTO_EX_DATA_FUNCS*)); 472 if (!storage) 473 goto skip; 474 for (i = 0; i < mx; i++) 475 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value( 476 item->meth, i); 477 } 478 skip: 479 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 480 if ((mx > 0) && !storage) { 481 CRYPTOerr(CRYPTO_F_INT_DUP_EX_DATA, ERR_R_MALLOC_FAILURE); 482 return 0; 483 } 484 for (i = 0; i < mx; i++) { 485 ptr = CRYPTO_get_ex_data(from, i); 486 if (storage[i] && storage[i]->dup_func) 487 storage[i]->dup_func(to, from, &ptr, i, 488 storage[i]->argl, storage[i]->argp); 489 CRYPTO_set_ex_data(to, i, ptr); 490 } 491 free(storage); 492 return 1; 493 } 494 495 /* Same thread-safety notes as for "int_new_ex_data" */ 496 static void 497 int_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 498 { 499 int mx, i; 500 EX_CLASS_ITEM *item; 501 void *ptr; 502 CRYPTO_EX_DATA_FUNCS **storage = NULL; 503 if ((item = def_get_class(class_index)) == NULL) 504 return; 505 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 506 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 507 if (mx > 0) { 508 storage = reallocarray(NULL, mx, sizeof(CRYPTO_EX_DATA_FUNCS*)); 509 if (!storage) 510 goto skip; 511 for (i = 0; i < mx; i++) 512 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value( 513 item->meth, i); 514 } 515 skip: 516 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 517 if ((mx > 0) && !storage) { 518 CRYPTOerr(CRYPTO_F_INT_FREE_EX_DATA, ERR_R_MALLOC_FAILURE); 519 return; 520 } 521 for (i = 0; i < mx; i++) { 522 if (storage[i] && storage[i]->free_func) { 523 ptr = CRYPTO_get_ex_data(ad, i); 524 storage[i]->free_func(obj, ptr, ad, i, 525 storage[i]->argl, storage[i]->argp); 526 } 527 } 528 free(storage); 529 if (ad->sk) { 530 sk_void_free(ad->sk); 531 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 int 542 CRYPTO_ex_data_new_class(void) 543 { 544 IMPL_CHECK 545 return EX_IMPL(new_class)(); 546 } 547 548 /* Release all "ex_data" state to prevent memory leaks. This can't be made 549 * thread-safe without overhauling a lot of stuff, and shouldn't really be 550 * called under potential race-conditions anyway (it's for program shutdown 551 * after all). */ 552 void 553 CRYPTO_cleanup_all_ex_data(void) 554 { 555 IMPL_CHECK 556 EX_IMPL(cleanup)(); 557 } 558 559 /* Inside an existing class, get/register a new index. */ 560 int 561 CRYPTO_get_ex_new_index(int class_index, long argl, void *argp, 562 CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 563 { 564 int ret = -1; 565 566 IMPL_CHECK 567 ret = EX_IMPL(get_new_index)(class_index, 568 argl, argp, new_func, dup_func, free_func); 569 return ret; 570 } 571 572 /* Initialise a new CRYPTO_EX_DATA for use in a particular class - including 573 * calling new() callbacks for each index in the class used by this variable */ 574 int 575 CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 576 { 577 IMPL_CHECK 578 return EX_IMPL(new_ex_data)(class_index, obj, ad); 579 } 580 581 /* Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks for 582 * each index in the class used by this variable */ 583 int 584 CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from) 585 { 586 IMPL_CHECK 587 return EX_IMPL(dup_ex_data)(class_index, to, from); 588 } 589 590 /* Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for 591 * each index in the class used by this variable */ 592 void 593 CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 594 { 595 IMPL_CHECK 596 EX_IMPL(free_ex_data)(class_index, obj, ad); 597 } 598 599 /* For a given CRYPTO_EX_DATA variable, set the value corresponding to a 600 * particular index in the class used by this variable */ 601 int 602 CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val) 603 { 604 int i; 605 606 if (ad->sk == NULL) { 607 if ((ad->sk = sk_void_new_null()) == NULL) { 608 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, 609 ERR_R_MALLOC_FAILURE); 610 return (0); 611 } 612 } 613 i = sk_void_num(ad->sk); 614 615 while (i <= idx) { 616 if (!sk_void_push(ad->sk, NULL)) { 617 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, 618 ERR_R_MALLOC_FAILURE); 619 return (0); 620 } 621 i++; 622 } 623 sk_void_set(ad->sk, idx, val); 624 return (1); 625 } 626 627 /* For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a 628 * particular index in the class used by this variable */ 629 void * 630 CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) 631 { 632 if (ad->sk == NULL) 633 return (0); 634 else if (idx >= sk_void_num(ad->sk)) 635 return (0); 636 else 637 return (sk_void_value(ad->sk, idx)); 638 } 639