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synced 2024-11-27 05:21:51 +08:00
7e5363abe3
Removed ability to set ex_data impl at runtime. This removed these
three functions:
const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void);
int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i);
int CRYPTO_ex_data_new_class(void);
It is no longer possible to change the ex_data implementation at
runtime. (Luckily those functions were never documented :)
Also removed the ability to add new exdata "classes." We don't believe
this received much (if any) use, since you can't add it to OpenSSL objects,
and there are probably better (native) methods for developers to add
their own extensible data, if they really need that.
Replaced the internal hash table (of per-"class" stacks) with a simple
indexed array. Reserved an index for "app" application.
Each API used to take the lock twice; now it only locks once.
Use local stack storage for function pointers, rather than malloc,
if possible (i.e., number of ex_data items is under a dozen).
Make CRYPTO_EX_DATA_FUNCS opaque/internal.
Also fixes RT3710; index zero is reserved.
Reviewed-by: Richard Levitte <levitte@openssl.org>
404 lines
14 KiB
C
404 lines
14 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "internal/cryptlib.h"
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#include <openssl/lhash.h>
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typedef struct {
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long argl; /* Arbitary long */
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void *argp; /* Arbitary void * */
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CRYPTO_EX_new *new_func;
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CRYPTO_EX_free *free_func;
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CRYPTO_EX_dup *dup_func;
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} CRYPTO_EX_DATA_FUNCS;
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DECLARE_STACK_OF(CRYPTO_EX_DATA_FUNCS)
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/*
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* State for each class; could just be a typedef, but this allows future
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* changes.
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*/
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typedef struct {
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STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
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} EX_CLASS_ITEM;
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static EX_CLASS_ITEM ex_data[CRYPTO_EX_INDEX__COUNT];
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/*
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* Return the EX_CLASS_ITEM from the "ex_data" array that corresponds to
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* a given class. On success, *holds the lock.*
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*/
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static EX_CLASS_ITEM *def_get_class(int class_index)
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{
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EX_CLASS_ITEM *ip;
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if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
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CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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ip = &ex_data[class_index];
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CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
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if (ip->meth == NULL) {
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ip->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null();
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/* We push an initial value on the stack because the SSL
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* "app_data" routines use ex_data index zero. See RT 3710. */
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if (ip->meth == NULL
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|| !sk_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
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CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
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CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
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return NULL;
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}
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}
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return ip;
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}
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static void cleanup_cb(CRYPTO_EX_DATA_FUNCS *funcs)
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{
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OPENSSL_free(funcs);
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}
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/*
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* Release all "ex_data" state to prevent memory leaks. This can't be made
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* thread-safe without overhauling a lot of stuff, and shouldn't really be
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* called under potential race-conditions anyway (it's for program shutdown
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* after all).
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*/
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void CRYPTO_cleanup_all_ex_data(void)
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{
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int i;
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for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
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EX_CLASS_ITEM *ip = &ex_data[i];
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sk_CRYPTO_EX_DATA_FUNCS_pop_free(ip->meth, cleanup_cb);
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ip->meth = NULL;
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}
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}
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/*
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* Inside an existing class, get/register a new index.
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*/
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int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
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CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
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CRYPTO_EX_free *free_func)
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{
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int toret = -1;
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CRYPTO_EX_DATA_FUNCS *a;
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EX_CLASS_ITEM *ip = def_get_class(class_index);
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if (!ip)
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return -1;
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a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(sizeof(*a));
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if (!a) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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a->argl = argl;
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a->argp = argp;
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a->new_func = new_func;
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a->dup_func = dup_func;
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a->free_func = free_func;
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if (!sk_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
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CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
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OPENSSL_free(a);
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goto err;
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}
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toret = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth) - 1;
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(void)sk_CRYPTO_EX_DATA_FUNCS_set(ip->meth, toret, a);
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err:
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CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
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return toret;
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}
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/*
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* Initialise a new CRYPTO_EX_DATA for use in a particular class - including
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* calling new() callbacks for each index in the class used by this variable
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* Thread-safe by copying a class's array of "CRYPTO_EX_DATA_FUNCS" entries
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* in the lock, then using them outside the lock. Note this only applies
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* to the global "ex_data" state (ie. class definitions), not 'ad' itself.
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*/
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int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
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{
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int mx, i;
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void *ptr;
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CRYPTO_EX_DATA_FUNCS **storage = NULL;
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CRYPTO_EX_DATA_FUNCS *stack[10];
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EX_CLASS_ITEM *ip = def_get_class(class_index);
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if (!ip)
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return 0;
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ad->sk = NULL;
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mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
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if (mx > 0) {
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if (mx < (int)OSSL_NELEM(stack))
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storage = stack;
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else
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storage = OPENSSL_malloc(sizeof(*storage) * mx);
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if (storage)
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for (i = 0; i < mx; i++)
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storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
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if (mx > 0 && storage == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_NEW_EX_DATA, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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for (i = 0; i < mx; i++) {
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if (storage[i] && storage[i]->new_func) {
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ptr = CRYPTO_get_ex_data(ad, i);
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storage[i]->new_func(obj, ptr, ad, i,
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storage[i]->argl, storage[i]->argp);
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}
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}
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if (storage != stack)
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OPENSSL_free(storage);
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return 1;
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}
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/*
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* Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks
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* for each index in the class used by this variable
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*/
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int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
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CRYPTO_EX_DATA *from)
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{
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int mx, j, i;
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char *ptr;
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CRYPTO_EX_DATA_FUNCS *stack[10];
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CRYPTO_EX_DATA_FUNCS **storage = NULL;
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EX_CLASS_ITEM *ip;
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if (from->sk == NULL)
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/* Nothing to copy over */
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return 1;
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if ((ip = def_get_class(class_index)) == NULL)
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return 0;
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mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
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j = sk_void_num(from->sk);
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if (j < mx)
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mx = j;
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if (mx > 0) {
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if (mx < (int)OSSL_NELEM(stack))
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storage = stack;
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else
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storage = OPENSSL_malloc(sizeof(*storage) * mx);
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if (storage)
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for (i = 0; i < mx; i++)
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storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
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if (mx > 0 && storage == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_DUP_EX_DATA, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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for (i = 0; i < mx; i++) {
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ptr = CRYPTO_get_ex_data(from, i);
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if (storage[i] && storage[i]->dup_func)
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storage[i]->dup_func(to, from, &ptr, i,
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storage[i]->argl, storage[i]->argp);
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CRYPTO_set_ex_data(to, i, ptr);
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}
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if (storage != stack)
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OPENSSL_free(storage);
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return 1;
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}
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/*
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* Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for
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* each index in the class used by this variable
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*/
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void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
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{
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int mx, i;
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EX_CLASS_ITEM *ip;
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void *ptr;
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CRYPTO_EX_DATA_FUNCS *stack[10];
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CRYPTO_EX_DATA_FUNCS **storage = NULL;
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if ((ip = def_get_class(class_index)) == NULL)
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return;
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mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
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if (mx > 0) {
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if (mx < (int)OSSL_NELEM(stack))
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storage = stack;
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else
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storage = OPENSSL_malloc(sizeof(*storage) * mx);
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if (storage)
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for (i = 0; i < mx; i++)
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storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
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if (mx > 0 && storage == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_FREE_EX_DATA, ERR_R_MALLOC_FAILURE);
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return;
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}
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for (i = 0; i < mx; i++) {
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if (storage[i] && storage[i]->free_func) {
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ptr = CRYPTO_get_ex_data(ad, i);
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storage[i]->free_func(obj, ptr, ad, i,
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storage[i]->argl, storage[i]->argp);
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}
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}
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if (storage != stack)
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OPENSSL_free(storage);
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sk_void_free(ad->sk);
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ad->sk = NULL;
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}
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/*
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* For a given CRYPTO_EX_DATA variable, set the value corresponding to a
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* particular index in the class used by this variable
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*/
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int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val)
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{
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int i;
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if (ad->sk == NULL) {
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if ((ad->sk = sk_void_new_null()) == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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for (i = sk_void_num(ad->sk); i <= idx; ++i) {
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if (!sk_void_push(ad->sk, NULL)) {
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CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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sk_void_set(ad->sk, idx, val);
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return 1;
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}
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/*
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* For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a
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* particular index in the class used by this variable
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*/
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void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
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{
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if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
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return NULL;
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return sk_void_value(ad->sk, idx);
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}
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