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fc6fc7ff38ead45fa4d64a407a9cf9ce49f8b578
openssl/crypto/lock.c

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/* crypto/cryptlib.c */
/* ====================================================================
* Copyright (c) 1998-2006 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 (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 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECDH support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include "cryptlib.h"
#include <openssl/safestack.h>
#ifdef OPENSSL_FIPS
#include <openssl/fips.h>
#endif
#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
#endif
DECLARE_STACK_OF(CRYPTO_dynlock)
/* real #defines in crypto.h, keep these upto date */
static const char* const lock_names[CRYPTO_NUM_LOCKS] =
{
"<<ERROR>>",
"err",
"ex_data",
"x509",
"x509_info",
"x509_pkey",
"x509_crl",
"x509_req",
"dsa",
"rsa",
"evp_pkey",
"x509_store",
"ssl_ctx",
"ssl_cert",
"ssl_session",
"ssl_sess_cert",
"ssl",
"ssl_method",
"rand",
"rand2",
"debug_malloc",
"BIO",
"gethostbyname",
"getservbyname",
"readdir",
"RSA_blinding",
"dh",
"debug_malloc2",
"dso",
"dynlock",
"engine",
"ui",
"ecdsa",
"ec",
"ecdh",
"bn",
"ec_pre_comp",
"store",
"comp",
"fips",
"fips2",
#if CRYPTO_NUM_LOCKS != 41
# error "Inconsistency between crypto.h and cryptlib.c"
#endif
};
/* This is for applications to allocate new type names in the non-dynamic
array of lock names. These are numbered with positive numbers. */
static STACK_OF(OPENSSL_STRING) *app_locks=NULL;
/* For applications that want a more dynamic way of handling threads, the
following stack is used. These are externally numbered with negative
numbers. */
static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
static void (MS_FAR *locking_callback)(int mode,int type,
const char *file,int line)=0;
static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
int type,const char *file,int line)=0;
static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
(const char *file,int line)=0;
static void (MS_FAR *dynlock_lock_callback)(int mode,
struct CRYPTO_dynlock_value *l, const char *file,int line)=0;
static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
const char *file,int line)=0;
int CRYPTO_get_new_lockid(char *name)
{
char *str;
int i;
#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
/* A hack to make Visual C++ 5.0 work correctly when linking as
* a DLL using /MT. Without this, the application cannot use
* any floating point printf's.
* It also seems to be needed for Visual C 1.5 (win16) */
SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
#endif
if ((app_locks == NULL) && ((app_locks=sk_OPENSSL_STRING_new_null()) == NULL))
{
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
return(0);
}
if ((str=BUF_strdup(name)) == NULL)
{
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
return(0);
}
i=sk_OPENSSL_STRING_push(app_locks,str);
if (!i)
OPENSSL_free(str);
else
i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
return(i);
}
int CRYPTO_num_locks(void)
{
return CRYPTO_NUM_LOCKS;
}
int CRYPTO_get_new_dynlockid(void)
{
int i = 0;
CRYPTO_dynlock *pointer = NULL;
if (dynlock_create_callback == NULL)
{
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
return(0);
}
CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
if ((dyn_locks == NULL)
&& ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
{
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
return(0);
}
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
if (pointer == NULL)
{
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
return(0);
}
pointer->references = 1;
pointer->data = dynlock_create_callback(__FILE__,__LINE__);
if (pointer->data == NULL)
{
OPENSSL_free(pointer);
CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
return(0);
}
CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
/* First, try to find an existing empty slot */
i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
/* If there was none, push, thereby creating a new one */
if (i == -1)
/* Since sk_push() returns the number of items on the
stack, not the location of the pushed item, we need
to transform the returned number into a position,
by decreasing it. */
i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
else
/* If we found a place with a NULL pointer, put our pointer
in it. */
(void)sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
if (i == -1)
{
dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
OPENSSL_free(pointer);
}
else
i += 1; /* to avoid 0 */
return -i;
}
void CRYPTO_destroy_dynlockid(int i)
{
CRYPTO_dynlock *pointer = NULL;
if (i)
i = -i-1;
if (dynlock_destroy_callback == NULL)
return;
CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
{
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
return;
}
pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
if (pointer != NULL)
{
--pointer->references;
#ifdef REF_CHECK
if (pointer->references < 0)
{
fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
abort();
}
else
#endif
if (pointer->references <= 0)
{
(void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
}
else
pointer = NULL;
}
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
if (pointer)
{
dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
OPENSSL_free(pointer);
}
}
struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
{
CRYPTO_dynlock *pointer = NULL;
if (i)
i = -i-1;
CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
if (pointer)
pointer->references++;
CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
if (pointer)
return pointer->data;
return NULL;
}
struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
(const char *file,int line)
{
return(dynlock_create_callback);
}
void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
struct CRYPTO_dynlock_value *l, const char *file,int line)
{
return(dynlock_lock_callback);
}
void (*CRYPTO_get_dynlock_destroy_callback(void))
(struct CRYPTO_dynlock_value *l, const char *file,int line)
{
return(dynlock_destroy_callback);
}
void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
(const char *file, int line))
{
dynlock_create_callback=func;
}
void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
struct CRYPTO_dynlock_value *l, const char *file, int line))
{
#ifdef OPENSSL_FIPS
FIPS_set_locking_callbacks(CRYPTO_lock, CRYPTO_add_lock);
#endif
dynlock_lock_callback=func;
}
void CRYPTO_set_dynlock_destroy_callback(void (*func)
(struct CRYPTO_dynlock_value *l, const char *file, int line))
{
dynlock_destroy_callback=func;
}
void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
int line)
{
return(locking_callback);
}
int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
const char *file,int line)
{
return(add_lock_callback);
}
void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
const char *file,int line))
{
#ifdef OPENSSL_FIPS
FIPS_set_locking_callbacks(CRYPTO_lock, CRYPTO_add_lock);
#endif
locking_callback=func;
}
void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
const char *file,int line))
{
add_lock_callback=func;
}
void CRYPTO_lock(int mode, int type, const char *file, int line)
{
#ifdef LOCK_DEBUG
{
CRYPTO_THREADID id;
char *rw_text,*operation_text;
if (mode & CRYPTO_LOCK)
operation_text="lock ";
else if (mode & CRYPTO_UNLOCK)
operation_text="unlock";
else
operation_text="ERROR ";
if (mode & CRYPTO_READ)
rw_text="r";
else if (mode & CRYPTO_WRITE)
rw_text="w";
else
rw_text="ERROR";
CRYPTO_THREADID_current(&id);
fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
CRYPTO_THREADID_hash(&id), rw_text, operation_text,
CRYPTO_get_lock_name(type), file, line);
}
#endif
if (type < 0)
{
if (dynlock_lock_callback != NULL)
{
struct CRYPTO_dynlock_value *pointer
= CRYPTO_get_dynlock_value(type);
OPENSSL_assert(pointer != NULL);
dynlock_lock_callback(mode, pointer, file, line);
CRYPTO_destroy_dynlockid(type);
}
}
else
if (locking_callback != NULL)
locking_callback(mode,type,file,line);
}
int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
int line)
{
int ret = 0;
if (add_lock_callback != NULL)
{
#ifdef LOCK_DEBUG
int before= *pointer;
#endif
ret=add_lock_callback(pointer,amount,type,file,line);
#ifdef LOCK_DEBUG
{
CRYPTO_THREADID id;
CRYPTO_THREADID_current(&id);
fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
CRYPTO_THREADID_hash(&id), before,amount,ret,
CRYPTO_get_lock_name(type),
file,line);
}
#endif
}
else
{
CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
ret= *pointer+amount;
#ifdef LOCK_DEBUG
{
CRYPTO_THREADID id;
CRYPTO_THREADID_current(&id);
fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
CRYPTO_THREADID_hash(&id),
*pointer,amount,ret,
CRYPTO_get_lock_name(type),
file,line);
}
#endif
*pointer=ret;
CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
}
return(ret);
}
const char *CRYPTO_get_lock_name(int type)
{
if (type < 0)
return("dynamic");
else if (type < CRYPTO_NUM_LOCKS)
return(lock_names[type]);
else if (type-CRYPTO_NUM_LOCKS > sk_OPENSSL_STRING_num(app_locks))
return("ERROR");
else
return(sk_OPENSSL_STRING_value(app_locks,type-CRYPTO_NUM_LOCKS));
}
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