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- /* 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 "internal/cryptlib.h"
- #include <openssl/lhash.h>
- /*
- * Each structure type (sometimes called a class), that supports
- * exdata has a stack of callbacks for each instance.
- */
- struct ex_callback_st {
- long argl; /* Arbitary long */
- void *argp; /* Arbitary void * */
- CRYPTO_EX_new *new_func;
- CRYPTO_EX_free *free_func;
- CRYPTO_EX_dup *dup_func;
- };
- /*
- * The state for each class. This could just be a typedef, but
- * a structure allows future changes.
- */
- typedef struct ex_callbacks_st {
- STACK_OF(EX_CALLBACK) *meth;
- } EX_CALLBACKS;
- static EX_CALLBACKS ex_data[CRYPTO_EX_INDEX__COUNT];
- /*
- * Return the EX_CALLBACKS from the |ex_data| array that corresponds to
- * a given class. On success, *holds the lock.*
- */
- static EX_CALLBACKS *get_and_lock(int class_index)
- {
- EX_CALLBACKS *ip;
- if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
- CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- ip = &ex_data[class_index];
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (ip->meth == NULL) {
- ip->meth = sk_EX_CALLBACK_new_null();
- /* We push an initial value on the stack because the SSL
- * "app_data" routines use ex_data index zero. See RT 3710. */
- if (ip->meth == NULL
- || !sk_EX_CALLBACK_push(ip->meth, NULL)) {
- CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return NULL;
- }
- }
- return ip;
- }
- static void cleanup_cb(EX_CALLBACK *funcs)
- {
- OPENSSL_free(funcs);
- }
- /*
- * 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)
- {
- int i;
- for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
- EX_CALLBACKS *ip = &ex_data[i];
- sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb);
- ip->meth = NULL;
- }
- }
- /*
- * Unregister a new index by replacing the callbacks with no-ops.
- * Any in-use instances are leaked.
- */
- static void dummy_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
- long argl, void *argp)
- {
- }
- static void dummy_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
- long argl, void *argp)
- {
- }
- static int dummy_dup(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from,
- void *from_d, int idx,
- long argl, void *argp)
- {
- return 0;
- }
- int CRYPTO_free_ex_index(int class_index, int idx)
- {
- EX_CALLBACKS *ip = get_and_lock(class_index);
- EX_CALLBACK *a;
- int toret = 0;
- if (ip == NULL)
- return 0;
- if (idx < 0 || idx >= sk_EX_CALLBACK_num(ip->meth))
- goto err;
- a = sk_EX_CALLBACK_value(ip->meth, idx);
- if (a == NULL)
- goto err;
- a->new_func = dummy_new;
- a->dup_func = dummy_dup;
- a->free_func = dummy_free;
- toret = 1;
- err:
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
- }
- /*
- * 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 toret = -1;
- EX_CALLBACK *a;
- EX_CALLBACKS *ip = get_and_lock(class_index);
- if (ip == NULL)
- return -1;
- a = (EX_CALLBACK *)OPENSSL_malloc(sizeof(*a));
- if (a == NULL) {
- CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- a->argl = argl;
- a->argp = argp;
- a->new_func = new_func;
- a->dup_func = dup_func;
- a->free_func = free_func;
- if (!sk_EX_CALLBACK_push(ip->meth, NULL)) {
- CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
- OPENSSL_free(a);
- goto err;
- }
- toret = sk_EX_CALLBACK_num(ip->meth) - 1;
- (void)sk_EX_CALLBACK_set(ip->meth, toret, a);
- err:
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
- }
- /*
- * 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
- * Thread-safe by copying a class's array of "EX_CALLBACK" entries
- * in the lock, then using them outside the lock. Note this only applies
- * to the global "ex_data" state (ie. class definitions), not 'ad' itself.
- */
- int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
- {
- int mx, i;
- void *ptr;
- EX_CALLBACK **storage = NULL;
- EX_CALLBACK *stack[10];
- EX_CALLBACKS *ip = get_and_lock(class_index);
- if (ip == NULL)
- return 0;
- ad->sk = NULL;
- mx = sk_EX_CALLBACK_num(ip->meth);
- if (mx > 0) {
- if (mx < (int)OSSL_NELEM(stack))
- storage = stack;
- else
- storage = OPENSSL_malloc(sizeof(*storage) * mx);
- if (storage != NULL)
- for (i = 0; i < mx; i++)
- storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- if (mx > 0 && storage == NULL) {
- CRYPTOerr(CRYPTO_F_CRYPTO_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 != stack)
- OPENSSL_free(storage);
- return 1;
- }
- /*
- * 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)
- {
- int mx, j, i;
- char *ptr;
- EX_CALLBACK *stack[10];
- EX_CALLBACK **storage = NULL;
- EX_CALLBACKS *ip;
- if (from->sk == NULL)
- /* Nothing to copy over */
- return 1;
- if ((ip = get_and_lock(class_index)) == NULL)
- return 0;
- mx = sk_EX_CALLBACK_num(ip->meth);
- j = sk_void_num(from->sk);
- if (j < mx)
- mx = j;
- if (mx > 0) {
- if (mx < (int)OSSL_NELEM(stack))
- storage = stack;
- else
- storage = OPENSSL_malloc(sizeof(*storage) * mx);
- if (storage != NULL)
- for (i = 0; i < mx; i++)
- storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- if (mx > 0 && storage == NULL) {
- CRYPTOerr(CRYPTO_F_CRYPTO_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 != stack)
- OPENSSL_free(storage);
- return 1;
- }
- /*
- * 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)
- {
- int mx, i;
- EX_CALLBACKS *ip;
- void *ptr;
- EX_CALLBACK *stack[10];
- EX_CALLBACK **storage = NULL;
- if ((ip = get_and_lock(class_index)) == NULL)
- return;
- mx = sk_EX_CALLBACK_num(ip->meth);
- if (mx > 0) {
- if (mx < (int)OSSL_NELEM(stack))
- storage = stack;
- else
- storage = OPENSSL_malloc(sizeof(*storage) * mx);
- if (storage != NULL)
- for (i = 0; i < mx; i++)
- storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- if (mx > 0 && storage == NULL) {
- CRYPTOerr(CRYPTO_F_CRYPTO_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 != stack)
- OPENSSL_free(storage);
- sk_void_free(ad->sk);
- ad->sk = NULL;
- }
- /*
- * 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;
- }
- }
- for (i = sk_void_num(ad->sk); i <= idx; ++i) {
- if (!sk_void_push(ad->sk, NULL)) {
- CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
- 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 || idx >= sk_void_num(ad->sk))
- return NULL;
- return sk_void_value(ad->sk, idx);
- }
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