-/* 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).
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#include "internal/cryptlib.h"
-#include <openssl/lhash.h>
-
+#include "internal/cryptlib_int.h"
+#include "internal/thread_once.h"
-typedef struct {
- long argl; /* Arbitary long */
- void *argp; /* Arbitary void * */
+/*
+ * Each structure type (sometimes called a class), that supports
+ * exdata has a stack of callbacks for each instance.
+ */
+struct ex_callback_st {
+ long argl; /* Arbitrary long */
+ void *argp; /* Arbitrary void * */
CRYPTO_EX_new *new_func;
CRYPTO_EX_free *free_func;
CRYPTO_EX_dup *dup_func;
-} CRYPTO_EX_DATA_FUNCS;
-
-DECLARE_STACK_OF(CRYPTO_EX_DATA_FUNCS)
+};
/*
- * State for each class; could just be a typedef, but this allows future
- * changes.
+ * The state for each class. This could just be a typedef, but
+ * a structure allows future changes.
*/
-typedef struct {
- STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
-} EX_CLASS_ITEM;
+typedef struct ex_callbacks_st {
+ STACK_OF(EX_CALLBACK) *meth;
+} EX_CALLBACKS;
+
+static EX_CALLBACKS ex_data[CRYPTO_EX_INDEX__COUNT];
+
+static CRYPTO_RWLOCK *ex_data_lock = NULL;
+static CRYPTO_ONCE ex_data_init = CRYPTO_ONCE_STATIC_INIT;
-static EX_CLASS_ITEM ex_data[CRYPTO_EX_INDEX__COUNT];
+DEFINE_RUN_ONCE_STATIC(do_ex_data_init)
+{
+ if (!OPENSSL_init_crypto(0, NULL))
+ return 0;
+ ex_data_lock = CRYPTO_THREAD_lock_new();
+ return ex_data_lock != NULL;
+}
/*
- * Return the EX_CLASS_ITEM from the "ex_data" array that corresponds to
+ * Return the EX_CALLBACKS from the |ex_data| array that corresponds to
* a given class. On success, *holds the lock.*
*/
-static EX_CLASS_ITEM *def_get_class(int class_index)
+static EX_CALLBACKS *get_and_lock(int class_index)
{
- EX_CLASS_ITEM *ip;
+ EX_CALLBACKS *ip;
if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
- CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_PASSED_INVALID_ARGUMENT);
return NULL;
}
- ip = &ex_data[class_index];
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (ip->meth == NULL) {
- ip->meth = sk_CRYPTO_EX_DATA_FUNCS_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_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
- CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return NULL;
- }
+ if (!RUN_ONCE(&ex_data_init, do_ex_data_init)) {
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (ex_data_lock == NULL) {
+ /*
+ * This can happen in normal operation when using CRYPTO_mem_leaks().
+ * The CRYPTO_mem_leaks() function calls OPENSSL_cleanup() which cleans
+ * up the locks. Subsequently the BIO that CRYPTO_mem_leaks() uses gets
+ * freed, which also attempts to free the ex_data. However
+ * CRYPTO_mem_leaks() ensures that the ex_data is freed early (i.e.
+ * before OPENSSL_cleanup() is called), so if we get here we can safely
+ * ignore this operation. We just treat it as an error.
+ */
+ return NULL;
}
+
+ ip = &ex_data[class_index];
+ CRYPTO_THREAD_write_lock(ex_data_lock);
return ip;
}
-static void cleanup_cb(CRYPTO_EX_DATA_FUNCS *funcs)
+static void cleanup_cb(EX_CALLBACK *funcs)
{
OPENSSL_free(funcs);
}
* called under potential race-conditions anyway (it's for program shutdown
* after all).
*/
-void CRYPTO_cleanup_all_ex_data(void)
+void crypto_cleanup_all_ex_data_int(void)
{
int i;
for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
- EX_CLASS_ITEM *ip = &ex_data[i];
+ EX_CALLBACKS *ip = &ex_data[i];
- sk_CRYPTO_EX_DATA_FUNCS_pop_free(ip->meth, cleanup_cb);
+ sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb);
ip->meth = NULL;
}
+
+ CRYPTO_THREAD_lock_free(ex_data_lock);
+ ex_data_lock = 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, const CRYPTO_EX_DATA *from,
+ void *from_d, int idx,
+ long argl, void *argp)
+{
+ return 1;
+}
+
+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_THREAD_unlock(ex_data_lock);
+ return toret;
}
/*
- * Inside an existing class, get/register a new index.
+ * 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;
- CRYPTO_EX_DATA_FUNCS *a;
- EX_CLASS_ITEM *ip = def_get_class(class_index);
+ EX_CALLBACK *a;
+ EX_CALLBACKS *ip = get_and_lock(class_index);
- if (!ip)
+ if (ip == NULL)
return -1;
- a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(sizeof(*a));
- if (!a) {
+
+ 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_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+
+ 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->dup_func = dup_func;
a->free_func = free_func;
- if (!sk_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
+ 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_CRYPTO_EX_DATA_FUNCS_num(ip->meth) - 1;
- (void)sk_CRYPTO_EX_DATA_FUNCS_set(ip->meth, toret, a);
+ 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);
+ CRYPTO_THREAD_unlock(ex_data_lock);
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 "CRYPTO_EX_DATA_FUNCS" entries
+ * 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 mx, i;
void *ptr;
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- EX_CLASS_ITEM *ip = def_get_class(class_index);
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACKS *ip = get_and_lock(class_index);
- if (!ip)
+ if (ip == NULL)
return 0;
ad->sk = NULL;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ 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)
+ if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
+ CRYPTO_THREAD_unlock(ex_data_lock);
if (mx > 0 && storage == NULL) {
CRYPTOerr(CRYPTO_F_CRYPTO_NEW_EX_DATA, ERR_R_MALLOC_FAILURE);
* 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)
+ const CRYPTO_EX_DATA *from)
{
int mx, j, i;
- char *ptr;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
- EX_CLASS_ITEM *ip;
+ void *ptr;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACKS *ip;
+ int toret = 0;
if (from->sk == NULL)
/* Nothing to copy over */
return 1;
- if ((ip = def_get_class(class_index)) == NULL)
+ if ((ip = get_and_lock(class_index)) == NULL)
return 0;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ mx = sk_EX_CALLBACK_num(ip->meth);
j = sk_void_num(from->sk);
if (j < mx)
mx = j;
storage = stack;
else
storage = OPENSSL_malloc(sizeof(*storage) * mx);
- if (storage)
+ if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
+ CRYPTO_THREAD_unlock(ex_data_lock);
- if (mx > 0 && storage == NULL) {
+ if (mx == 0)
+ return 1;
+ if (storage == NULL) {
CRYPTOerr(CRYPTO_F_CRYPTO_DUP_EX_DATA, ERR_R_MALLOC_FAILURE);
return 0;
}
+ /*
+ * Make sure the ex_data stack is at least |mx| elements long to avoid
+ * issues in the for loop that follows; so go get the |mx|'th element
+ * (if it does not exist CRYPTO_get_ex_data() returns NULL), and assign
+ * to itself. This is normally a no-op; but ensures the stack is the
+ * proper size
+ */
+ if (!CRYPTO_set_ex_data(to, mx - 1, CRYPTO_get_ex_data(to, mx - 1)))
+ goto err;
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);
+ if (!storage[i]->dup_func(to, from, &ptr, i,
+ storage[i]->argl, storage[i]->argp))
+ goto err;
CRYPTO_set_ex_data(to, i, ptr);
}
+ toret = 1;
+ err:
if (storage != stack)
OPENSSL_free(storage);
- return 1;
+ return toret;
}
void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
{
int mx, i;
- EX_CLASS_ITEM *ip;
+ EX_CALLBACKS *ip;
void *ptr;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
+ EX_CALLBACK *f;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
- if ((ip = def_get_class(class_index)) == NULL)
- return;
+ if ((ip = get_and_lock(class_index)) == NULL)
+ goto err;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ 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)
+ if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
+ CRYPTO_THREAD_unlock(ex_data_lock);
- 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) {
+ if (storage != NULL)
+ f = storage[i];
+ else {
+ CRYPTO_THREAD_write_lock(ex_data_lock);
+ f = sk_EX_CALLBACK_value(ip->meth, i);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+ }
+ if (f != NULL && f->free_func != NULL) {
ptr = CRYPTO_get_ex_data(ad, i);
- storage[i]->free_func(obj, ptr, ad, i,
- storage[i]->argl, storage[i]->argp);
+ f->free_func(obj, ptr, ad, i, f->argl, f->argp);
}
}
if (storage != stack)
OPENSSL_free(storage);
+ err:
sk_void_free(ad->sk);
ad->sk = NULL;
}
projects / openssl.git / blobdiff