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 */ 145struct 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 */ 171static 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 */ 178static int int_new_class(void); 179static void int_cleanup(void); 180static 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); 183static int int_new_ex_data(int class_index, void *obj, 184 CRYPTO_EX_DATA *ad); 185static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, 186 CRYPTO_EX_DATA *from); 187static void int_free_ex_data(int class_index, void *obj, 188 CRYPTO_EX_DATA *ad); 189static 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. */ 201static void impl_check(void) 202 { 203 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 204 if(!impl) 205 impl = &impl_default; 206 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 207 } 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 */ 213const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void) 214 { 215 IMPL_CHECK 216 return impl; 217 } 218int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i) 219 { 220 int toret = 0; 221 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 222 if(!impl) 223 { 224 impl = i; 225 toret = 1; 226 } 227 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 228 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. */ 238typedef 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 */ 245static int ex_class = CRYPTO_EX_INDEX_USER; 246 247/* The global hash table of EX_CLASS_ITEM items */ 248DECLARE_LHASH_OF(EX_CLASS_ITEM); 249static LHASH_OF(EX_CLASS_ITEM) *ex_data = NULL; 250 251/* The callbacks required in the "ex_data" hash table */ 252static unsigned long ex_class_item_hash(const EX_CLASS_ITEM *a) 253 { 254 return a->class_index; 255 } 256static IMPLEMENT_LHASH_HASH_FN(ex_class_item, EX_CLASS_ITEM) 257 258static int ex_class_item_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b) 259 { 260 return a->class_index - b->class_index; 261 } 262static 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 267static int ex_data_check(void) 268 { 269 int toret = 1; 270 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 271 if(!ex_data 272 && (ex_data = lh_EX_CLASS_ITEM_new()) == NULL) 273 toret = 0; 274 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 275 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 */ 282static void def_cleanup_util_cb(CRYPTO_EX_DATA_FUNCS *funcs) 283 { 284 OPENSSL_free(funcs); 285 } 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. */ 290static void def_cleanup_cb(void *a_void) 291 { 292 EX_CLASS_ITEM *item = (EX_CLASS_ITEM *)a_void; 293 sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, def_cleanup_util_cb); 294 OPENSSL_free(item); 295 } 296 297/* Return the EX_CLASS_ITEM from the "ex_data" hash table that corresponds to a 298 * given class. Handles locking. */ 299static EX_CLASS_ITEM *def_get_class(int class_index) 300 { 301 EX_CLASS_ITEM d, *p, *gen; 302 EX_DATA_CHECK(return NULL;) 303 d.class_index = class_index; 304 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 305 p = lh_EX_CLASS_ITEM_retrieve(ex_data, &d); 306 if(!p) 307 { 308 gen = OPENSSL_malloc(sizeof(EX_CLASS_ITEM)); 309 if(gen) 310 { 311 gen->class_index = class_index; 312 gen->meth_num = 0; 313 gen->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null(); 314 if(!gen->meth) 315 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 (void)lh_EX_CLASS_ITEM_insert(ex_data, gen); 321 p = gen; 322 } 323 } 324 } 325 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 326 if(!p) 327 CRYPTOerr(CRYPTO_F_DEF_GET_CLASS,ERR_R_MALLOC_FAILURE); 328 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. */ 333static 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 int toret = -1; 338 CRYPTO_EX_DATA_FUNCS *a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc( 339 sizeof(CRYPTO_EX_DATA_FUNCS)); 340 if(!a) 341 { 342 CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE); 343 return -1; 344 } 345 a->argl=argl; 346 a->argp=argp; 347 a->new_func=new_func; 348 a->dup_func=dup_func; 349 a->free_func=free_func; 350 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 351 while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num) 352 { 353 if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL)) 354 { 355 CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE); 356 OPENSSL_free(a); 357 goto err; 358 } 359 } 360 toret = item->meth_num++; 361 (void)sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, toret, a); 362err: 363 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 370static int int_new_class(void) 371 { 372 int toret; 373 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 374 toret = ex_class++; 375 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 376 return toret; 377 } 378 379static void int_cleanup(void) 380 { 381 EX_DATA_CHECK(return;) 382 lh_EX_CLASS_ITEM_doall(ex_data, def_cleanup_cb); 383 lh_EX_CLASS_ITEM_free(ex_data); 384 ex_data = NULL; 385 impl = NULL; 386 } 387 388static 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 EX_CLASS_ITEM *item = def_get_class(class_index); 393 if(!item) 394 return -1; 395 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. */ 402static int int_new_ex_data(int class_index, void *obj, 403 CRYPTO_EX_DATA *ad) 404 { 405 int mx,i; 406 void *ptr; 407 CRYPTO_EX_DATA_FUNCS **storage = NULL; 408 EX_CLASS_ITEM *item = def_get_class(class_index); 409 if(!item) 410 /* error is already set */ 411 return 0; 412 ad->sk = NULL; 413 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 414 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 415 if(mx > 0) 416 { 417 storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); 418 if(!storage) 419 goto skip; 420 for(i = 0; i < mx; i++) 421 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); 422 } 423skip: 424 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 425 if((mx > 0) && !storage) 426 { 427 CRYPTOerr(CRYPTO_F_INT_NEW_EX_DATA,ERR_R_MALLOC_FAILURE); 428 return 0; 429 } 430 for(i = 0; i < mx; i++) 431 { 432 if(storage[i] && storage[i]->new_func) 433 { 434 ptr = CRYPTO_get_ex_data(ad, i); 435 storage[i]->new_func(obj,ptr,ad,i, 436 storage[i]->argl,storage[i]->argp); 437 } 438 } 439 if(storage) 440 OPENSSL_free(storage); 441 return 1; 442 } 443 444/* Same thread-safety notes as for "int_new_ex_data" */ 445static 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 CRYPTO_EX_DATA_FUNCS **storage = NULL; 451 EX_CLASS_ITEM *item; 452 if(!from->sk) 453 /* 'to' should be "blank" which *is* just like 'from' */ 454 return 1; 455 if((item = def_get_class(class_index)) == NULL) 456 return 0; 457 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 458 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 459 j = sk_void_num(from->sk); 460 if(j < mx) 461 mx = j; 462 if(mx > 0) 463 { 464 storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); 465 if(!storage) 466 goto skip; 467 for(i = 0; i < mx; i++) 468 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); 469 } 470skip: 471 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 472 if((mx > 0) && !storage) 473 { 474 CRYPTOerr(CRYPTO_F_INT_DUP_EX_DATA,ERR_R_MALLOC_FAILURE); 475 return 0; 476 } 477 for(i = 0; i < mx; i++) 478 { 479 ptr = CRYPTO_get_ex_data(from, i); 480 if(storage[i] && storage[i]->dup_func) 481 storage[i]->dup_func(to,from,&ptr,i, 482 storage[i]->argl,storage[i]->argp); 483 CRYPTO_set_ex_data(to,i,ptr); 484 } 485 if(storage) 486 OPENSSL_free(storage); 487 return 1; 488 } 489 490/* Same thread-safety notes as for "int_new_ex_data" */ 491static 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 CRYPTO_EX_DATA_FUNCS **storage = NULL; 498 if((item = def_get_class(class_index)) == NULL) 499 return; 500 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 501 mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); 502 if(mx > 0) 503 { 504 storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); 505 if(!storage) 506 goto skip; 507 for(i = 0; i < mx; i++) 508 storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); 509 } 510skip: 511 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 512 if((mx > 0) && !storage) 513 { 514 CRYPTOerr(CRYPTO_F_INT_FREE_EX_DATA,ERR_R_MALLOC_FAILURE); 515 return; 516 } 517 for(i = 0; i < mx; i++) 518 { 519 if(storage[i] && storage[i]->free_func) 520 { 521 ptr = CRYPTO_get_ex_data(ad,i); 522 storage[i]->free_func(obj,ptr,ad,i, 523 storage[i]->argl,storage[i]->argp); 524 } 525 } 526 if(storage) 527 OPENSSL_free(storage); 528 if(ad->sk) 529 { 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*) */ 541int CRYPTO_ex_data_new_class(void) 542 { 543 IMPL_CHECK 544 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). */ 551void CRYPTO_cleanup_all_ex_data(void) 552 { 553 IMPL_CHECK 554 EX_IMPL(cleanup)(); 555 } 556 557/* Inside an existing class, get/register a new index. */ 558int 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 int ret = -1; 563 564 IMPL_CHECK 565 ret = EX_IMPL(get_new_index)(class_index, 566 argl, argp, new_func, dup_func, free_func); 567 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 */ 572int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 573 { 574 IMPL_CHECK 575 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 */ 580int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, 581 CRYPTO_EX_DATA *from) 582 { 583 IMPL_CHECK 584 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 */ 589void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) 590 { 591 IMPL_CHECK 592 EX_IMPL(free_ex_data)(class_index, obj, ad); 593 } 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 */ 597int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val) 598 { 599 int i; 600 601 if (ad->sk == NULL) 602 { 603 if ((ad->sk=sk_void_new_null()) == NULL) 604 { 605 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); 606 return(0); 607 } 608 } 609 i=sk_void_num(ad->sk); 610 611 while (i <= idx) 612 { 613 if (!sk_void_push(ad->sk,NULL)) 614 { 615 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); 616 return(0); 617 } 618 i++; 619 } 620 sk_void_set(ad->sk,idx,val); 621 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 */ 626void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) 627 { 628 if (ad->sk == NULL) 629 return(0); 630 else if (idx >= sk_void_num(ad->sk)) 631 return(0); 632 else 633 return(sk_void_value(ad->sk,idx)); 634 } 635 636IMPLEMENT_STACK_OF(CRYPTO_EX_DATA_FUNCS) 637