diff options
Diffstat (limited to 'openssl/crypto/ex_data.c')
| -rw-r--r-- | openssl/crypto/ex_data.c | 636 |
1 files changed, 0 insertions, 636 deletions
diff --git a/openssl/crypto/ex_data.c b/openssl/crypto/ex_data.c deleted file mode 100644 index e2bc8298..00000000 --- a/openssl/crypto/ex_data.c +++ /dev/null @@ -1,636 +0,0 @@ -/* crypto/ex_data.c */ - -/* - * Overhaul notes; - * - * This code is now *mostly* thread-safe. It is now easier to understand in what - * ways it is safe and in what ways it is not, which is an improvement. Firstly, - * all per-class stacks and index-counters for ex_data are stored in the same - * global LHASH table (keyed by class). This hash table uses locking for all - * access with the exception of CRYPTO_cleanup_all_ex_data(), which must only be - * called when no other threads can possibly race against it (even if it was - * locked, the race would mean it's possible the hash table might have been - * recreated after the cleanup). As classes can only be added to the hash table, - * and within each class, the stack of methods can only be incremented, the - * locking mechanics are simpler than they would otherwise be. For example, the - * new/dup/free ex_data functions will lock the hash table, copy the method - * pointers it needs from the relevant class, then unlock the hash table before - * actually applying those method pointers to the task of the new/dup/free - * operations. As they can't be removed from the method-stack, only - * supplemented, there's no race conditions associated with using them outside - * the lock. The get/set_ex_data functions are not locked because they do not - * involve this global state at all - they operate directly with a previously - * obtained per-class method index and a particular "ex_data" variable. These - * variables are usually instantiated per-context (eg. each RSA structure has - * one) so locking on read/write access to that variable can be locked locally - * if required (eg. using the "RSA" lock to synchronise access to a - * per-RSA-structure ex_data variable if required). - * [Geoff] - */ - -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ -/* ==================================================================== - * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * openssl-core@openssl.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ - -#include "cryptlib.h" -#include <openssl/lhash.h> - -/* What an "implementation of ex_data functionality" looks like */ -struct st_CRYPTO_EX_DATA_IMPL - { - /*********************/ - /* GLOBAL OPERATIONS */ - /* Return a new class index */ - int (*cb_new_class)(void); - /* Cleanup all state used by the implementation */ - void (*cb_cleanup)(void); - /************************/ - /* PER-CLASS OPERATIONS */ - /* Get a new method index within a class */ - int (*cb_get_new_index)(int class_index, long argl, void *argp, - CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, - CRYPTO_EX_free *free_func); - /* Initialise a new CRYPTO_EX_DATA of a given class */ - int (*cb_new_ex_data)(int class_index, void *obj, - CRYPTO_EX_DATA *ad); - /* Duplicate a CRYPTO_EX_DATA of a given class onto a copy */ - int (*cb_dup_ex_data)(int class_index, CRYPTO_EX_DATA *to, - CRYPTO_EX_DATA *from); - /* Cleanup a CRYPTO_EX_DATA of a given class */ - void (*cb_free_ex_data)(int class_index, void *obj, - CRYPTO_EX_DATA *ad); - }; - -/* The implementation we use at run-time */ -static const CRYPTO_EX_DATA_IMPL *impl = NULL; - -/* To call "impl" functions, use this macro rather than referring to 'impl' directly, eg. - * EX_IMPL(get_new_index)(...); */ -#define EX_IMPL(a) impl->cb_##a - -/* Predeclare the "default" ex_data implementation */ -static int int_new_class(void); -static void int_cleanup(void); -static int int_get_new_index(int class_index, long argl, void *argp, - CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, - CRYPTO_EX_free *free_func); -static int int_new_ex_data(int class_index, void *obj, - CRYPTO_EX_DATA *ad); -static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, - CRYPTO_EX_DATA *from); -static void int_free_ex_data(int class_index, void *obj, - CRYPTO_EX_DATA *ad); -static CRYPTO_EX_DATA_IMPL impl_default = - { - int_new_class, - int_cleanup, - int_get_new_index, - int_new_ex_data, - int_dup_ex_data, - int_free_ex_data - }; - -/* Internal function that checks whether "impl" is set and if not, sets it to - * the default. */ -static void impl_check(void) - { - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - if(!impl) - impl = &impl_default; - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - } -/* A macro wrapper for impl_check that first uses a non-locked test before - * invoking the function (which checks again inside a lock). */ -#define IMPL_CHECK if(!impl) impl_check(); - -/* API functions to get/set the "ex_data" implementation */ -const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void) - { - IMPL_CHECK - return impl; - } -int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i) - { - int toret = 0; - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - if(!impl) - { - impl = i; - toret = 1; - } - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - return toret; - } - -/****************************************************************************/ -/* Interal (default) implementation of "ex_data" support. API functions are - * further down. */ - -/* The type that represents what each "class" used to implement locally. A STACK - * of CRYPTO_EX_DATA_FUNCS plus a index-counter. The 'class_index' is the global - * value representing the class that is used to distinguish these items. */ -typedef struct st_ex_class_item { - int class_index; - STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth; - int meth_num; -} EX_CLASS_ITEM; - -/* When assigning new class indexes, this is our counter */ -static int ex_class = CRYPTO_EX_INDEX_USER; - -/* The global hash table of EX_CLASS_ITEM items */ -DECLARE_LHASH_OF(EX_CLASS_ITEM); -static LHASH_OF(EX_CLASS_ITEM) *ex_data = NULL; - -/* The callbacks required in the "ex_data" hash table */ -static unsigned long ex_class_item_hash(const EX_CLASS_ITEM *a) - { - return a->class_index; - } -static IMPLEMENT_LHASH_HASH_FN(ex_class_item, EX_CLASS_ITEM) - -static int ex_class_item_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b) - { - return a->class_index - b->class_index; - } -static IMPLEMENT_LHASH_COMP_FN(ex_class_item, EX_CLASS_ITEM) - -/* Internal functions used by the "impl_default" implementation to access the - * state */ - -static int ex_data_check(void) - { - int toret = 1; - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - if(!ex_data - && (ex_data = lh_EX_CLASS_ITEM_new()) == NULL) - toret = 0; - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - return toret; - } -/* This macros helps reduce the locking from repeated checks because the - * ex_data_check() function checks ex_data again inside a lock. */ -#define EX_DATA_CHECK(iffail) if(!ex_data && !ex_data_check()) {iffail} - -/* This "inner" callback is used by the callback function that follows it */ -static void def_cleanup_util_cb(CRYPTO_EX_DATA_FUNCS *funcs) - { - OPENSSL_free(funcs); - } - -/* This callback is used in lh_doall to destroy all EX_CLASS_ITEM values from - * "ex_data" prior to the ex_data hash table being itself destroyed. Doesn't do - * any locking. */ -static void def_cleanup_cb(void *a_void) - { - EX_CLASS_ITEM *item = (EX_CLASS_ITEM *)a_void; - sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, def_cleanup_util_cb); - OPENSSL_free(item); - } - -/* Return the EX_CLASS_ITEM from the "ex_data" hash table that corresponds to a - * given class. Handles locking. */ -static EX_CLASS_ITEM *def_get_class(int class_index) - { - EX_CLASS_ITEM d, *p, *gen; - EX_DATA_CHECK(return NULL;) - d.class_index = class_index; - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - p = lh_EX_CLASS_ITEM_retrieve(ex_data, &d); - if(!p) - { - gen = OPENSSL_malloc(sizeof(EX_CLASS_ITEM)); - if(gen) - { - gen->class_index = class_index; - gen->meth_num = 0; - gen->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null(); - if(!gen->meth) - OPENSSL_free(gen); - else - { - /* Because we're inside the ex_data lock, the - * return value from the insert will be NULL */ - (void)lh_EX_CLASS_ITEM_insert(ex_data, gen); - p = gen; - } - } - } - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - if(!p) - CRYPTOerr(CRYPTO_F_DEF_GET_CLASS,ERR_R_MALLOC_FAILURE); - return p; - } - -/* Add a new method to the given EX_CLASS_ITEM and return the corresponding - * index (or -1 for error). Handles locking. */ -static int def_add_index(EX_CLASS_ITEM *item, long argl, void *argp, - CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, - CRYPTO_EX_free *free_func) - { - int toret = -1; - CRYPTO_EX_DATA_FUNCS *a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc( - sizeof(CRYPTO_EX_DATA_FUNCS)); - if(!a) - { - CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE); - return -1; - } - a->argl=argl; - a->argp=argp; - a->new_func=new_func; - a->dup_func=dup_func; - a->free_func=free_func; - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num) - { - if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL)) - { - CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE); - OPENSSL_free(a); - goto err; - } - } - toret = item->meth_num++; - (void)sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, toret, a); -err: - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - return toret; - } - -/**************************************************************/ -/* The functions in the default CRYPTO_EX_DATA_IMPL structure */ - -static int int_new_class(void) - { - int toret; - CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); - toret = ex_class++; - CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); - return toret; - } - -static void int_cleanup(void) - { - EX_DATA_CHECK(return;) - lh_EX_CLASS_ITEM_doall(ex_data, def_cleanup_cb); - lh_EX_CLASS_ITEM_free(ex_data); - ex_data = NULL; - impl = NULL; - } - -static int int_get_new_index(int class_index, long argl, void *argp, - CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, - CRYPTO_EX_free *free_func) - { - EX_CLASS_ITEM *item = def_get_class(class_index); - if(!item) - return -1; - return def_add_index(item, argl, argp, new_func, dup_func, free_func); - } - -/* Thread-safe by copying a class's array of "CRYPTO_EX_DATA_FUNCS" entries in - * the lock, then using them outside the lock. NB: Thread-safety only applies to - * the global "ex_data" state (ie. class definitions), not thread-safe on 'ad' - * itself. */ -static int int_new_ex_data(int class_index, void *obj, - CRYPTO_EX_DATA *ad) - { - int mx,i; - void *ptr; - CRYPTO_EX_DATA_FUNCS **storage = NULL; - EX_CLASS_ITEM *item = def_get_class(class_index); - if(!item) - /* error is already set */ - return 0; - ad->sk = NULL; - CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); - mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); - if(mx > 0) - { - storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); - if(!storage) - goto skip; - for(i = 0; i < mx; i++) - storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); - } -skip: - CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); - if((mx > 0) && !storage) - { - CRYPTOerr(CRYPTO_F_INT_NEW_EX_DATA,ERR_R_MALLOC_FAILURE); - return 0; - } - for(i = 0; i < mx; i++) - { - if(storage[i] && storage[i]->new_func) - { - ptr = CRYPTO_get_ex_data(ad, i); - storage[i]->new_func(obj,ptr,ad,i, - storage[i]->argl,storage[i]->argp); - } - } - if(storage) - OPENSSL_free(storage); - return 1; - } - -/* Same thread-safety notes as for "int_new_ex_data" */ -static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, - CRYPTO_EX_DATA *from) - { - int mx, j, i; - char *ptr; - CRYPTO_EX_DATA_FUNCS **storage = NULL; - EX_CLASS_ITEM *item; - if(!from->sk) - /* 'to' should be "blank" which *is* just like 'from' */ - return 1; - if((item = def_get_class(class_index)) == NULL) - return 0; - CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); - mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); - j = sk_void_num(from->sk); - if(j < mx) - mx = j; - if(mx > 0) - { - storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); - if(!storage) - goto skip; - for(i = 0; i < mx; i++) - storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); - } -skip: - CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); - if((mx > 0) && !storage) - { - CRYPTOerr(CRYPTO_F_INT_DUP_EX_DATA,ERR_R_MALLOC_FAILURE); - return 0; - } - for(i = 0; i < mx; i++) - { - ptr = CRYPTO_get_ex_data(from, i); - if(storage[i] && storage[i]->dup_func) - storage[i]->dup_func(to,from,&ptr,i, - storage[i]->argl,storage[i]->argp); - CRYPTO_set_ex_data(to,i,ptr); - } - if(storage) - OPENSSL_free(storage); - return 1; - } - -/* Same thread-safety notes as for "int_new_ex_data" */ -static void int_free_ex_data(int class_index, void *obj, - CRYPTO_EX_DATA *ad) - { - int mx,i; - EX_CLASS_ITEM *item; - void *ptr; - CRYPTO_EX_DATA_FUNCS **storage = NULL; - if((item = def_get_class(class_index)) == NULL) - return; - CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); - mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth); - if(mx > 0) - { - storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*)); - if(!storage) - goto skip; - for(i = 0; i < mx; i++) - storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i); - } -skip: - CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); - if((mx > 0) && !storage) - { - CRYPTOerr(CRYPTO_F_INT_FREE_EX_DATA,ERR_R_MALLOC_FAILURE); - return; - } - for(i = 0; i < mx; i++) - { - if(storage[i] && storage[i]->free_func) - { - ptr = CRYPTO_get_ex_data(ad,i); - storage[i]->free_func(obj,ptr,ad,i, - storage[i]->argl,storage[i]->argp); - } - } - if(storage) - OPENSSL_free(storage); - if(ad->sk) - { - sk_void_free(ad->sk); - ad->sk=NULL; - } - } - -/********************************************************************/ -/* API functions that defer all "state" operations to the "ex_data" - * implementation we have set. */ - -/* Obtain an index for a new class (not the same as getting a new index within - * an existing class - this is actually getting a new *class*) */ -int CRYPTO_ex_data_new_class(void) - { - IMPL_CHECK - return EX_IMPL(new_class)(); - } - -/* Release all "ex_data" state to prevent memory leaks. This can't be made - * thread-safe without overhauling a lot of stuff, and shouldn't really be - * called under potential race-conditions anyway (it's for program shutdown - * after all). */ -void CRYPTO_cleanup_all_ex_data(void) - { - IMPL_CHECK - EX_IMPL(cleanup)(); - } - -/* Inside an existing class, get/register a new index. */ -int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp, - CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, - CRYPTO_EX_free *free_func) - { - int ret = -1; - - IMPL_CHECK - ret = EX_IMPL(get_new_index)(class_index, - argl, argp, new_func, dup_func, free_func); - return ret; - } - -/* Initialise a new CRYPTO_EX_DATA for use in a particular class - including - * calling new() callbacks for each index in the class used by this variable */ -int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) - { - IMPL_CHECK - return EX_IMPL(new_ex_data)(class_index, obj, ad); - } - -/* Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks for - * each index in the class used by this variable */ -int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to, - CRYPTO_EX_DATA *from) - { - IMPL_CHECK - return EX_IMPL(dup_ex_data)(class_index, to, from); - } - -/* Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for - * each index in the class used by this variable */ -void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad) - { - IMPL_CHECK - EX_IMPL(free_ex_data)(class_index, obj, ad); - } - -/* For a given CRYPTO_EX_DATA variable, set the value corresponding to a - * particular index in the class used by this variable */ -int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val) - { - int i; - - if (ad->sk == NULL) - { - if ((ad->sk=sk_void_new_null()) == NULL) - { - CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); - return(0); - } - } - i=sk_void_num(ad->sk); - - while (i <= idx) - { - if (!sk_void_push(ad->sk,NULL)) - { - CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); - return(0); - } - i++; - } - sk_void_set(ad->sk,idx,val); - return(1); - } - -/* For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a - * particular index in the class used by this variable */ -void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) - { - if (ad->sk == NULL) - return(0); - else if (idx >= sk_void_num(ad->sk)) - return(0); - else - return(sk_void_value(ad->sk,idx)); - } - -IMPLEMENT_STACK_OF(CRYPTO_EX_DATA_FUNCS) |