[thirdparty/openssl.git] / crypto / lock.c

/* 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>

#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))
	{
	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))
	{
	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));
	}
Commit	Line	Data
ad6019d6 DSH	1	/* crypto/cryptlib.c */
	2	/* ====================================================================
	3	* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	*
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	*
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in
	14	* the documentation and/or other materials provided with the
	15	* distribution.
	16	*
	17	* 3. All advertising materials mentioning features or use of this
	18	* software must display the following acknowledgment:
	19	* "This product includes software developed by the OpenSSL Project
	20	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	21	*
	22	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	23	* endorse or promote products derived from this software without
	24	* prior written permission. For written permission, please contact
	25	* openssl-core@openssl.org.
	26	*
	27	* 5. Products derived from this software may not be called "OpenSSL"
	28	* nor may "OpenSSL" appear in their names without prior written
	29	* permission of the OpenSSL Project.
	30	*
	31	* 6. Redistributions of any form whatsoever must retain the following
	32	* acknowledgment:
	33	* "This product includes software developed by the OpenSSL Project
	34	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	35	*
	36	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	37	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	38	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	39	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	40	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	41	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	42	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	43	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	44	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	45	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	46	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	47	* OF THE POSSIBILITY OF SUCH DAMAGE.
	48	* ====================================================================
	49	*
	50	* This product includes cryptographic software written by Eric Young
	51	* (eay@cryptsoft.com). This product includes software written by Tim
	52	* Hudson (tjh@cryptsoft.com).
	53	*
	54	*/
	55	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
	56	* All rights reserved.
	57	*
	58	* This package is an SSL implementation written
	59	* by Eric Young (eay@cryptsoft.com).
	60	* The implementation was written so as to conform with Netscapes SSL.
	61	*
	62	* This library is free for commercial and non-commercial use as long as
	63	* the following conditions are aheared to. The following conditions
	64	* apply to all code found in this distribution, be it the RC4, RSA,
65	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
66	* included with this distribution is covered by the same copyright terms
67	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
68	*
69	* Copyright remains Eric Young's, and as such any Copyright notices in
70	* the code are not to be removed.
71	* If this package is used in a product, Eric Young should be given attribution
72	* as the author of the parts of the library used.
73	* This can be in the form of a textual message at program startup or
74	* in documentation (online or textual) provided with the package.
75	*
76	* Redistribution and use in source and binary forms, with or without
77	* modification, are permitted provided that the following conditions
78	* are met:
79	* 1. Redistributions of source code must retain the copyright
80	* notice, this list of conditions and the following disclaimer.
81	* 2. Redistributions in binary form must reproduce the above copyright
82	* notice, this list of conditions and the following disclaimer in the
83	* documentation and/or other materials provided with the distribution.
84	* 3. All advertising materials mentioning features or use of this software
85	* must display the following acknowledgement:
86	* "This product includes cryptographic software written by
87	* Eric Young (eay@cryptsoft.com)"
88	* The word 'cryptographic' can be left out if the rouines from the library
89	* being used are not cryptographic related :-).
90	* 4. If you include any Windows specific code (or a derivative thereof) from
91	* the apps directory (application code) you must include an acknowledgement:
92	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
93	*
94	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
95	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
97	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
98	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
99	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
100	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
101	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
102	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
103	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
104	* SUCH DAMAGE.
105	*
106	* The licence and distribution terms for any publically available version or
107	* derivative of this code cannot be changed. i.e. this code cannot simply be
108	* copied and put under another distribution licence
109	* [including the GNU Public Licence.]
110	*/
111	/* ====================================================================
112	* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113	* ECDH support in OpenSSL originally developed by
114	* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115	*/
116
117	#include "cryptlib.h"
118	#include <openssl/safestack.h>
119
120	#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_WIN16)
121	static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
122	#endif
123
124	DECLARE_STACK_OF(CRYPTO_dynlock)
125
126	/* real #defines in crypto.h, keep these upto date */
127	static const char* const lock_names[CRYPTO_NUM_LOCKS] =
128	{
129	"<<ERROR>>",
130	"err",
131	"ex_data",
132	"x509",
133	"x509_info",
134	"x509_pkey",
135	"x509_crl",
136	"x509_req",
137	"dsa",
138	"rsa",
139	"evp_pkey",
140	"x509_store",
141	"ssl_ctx",
142	"ssl_cert",
143	"ssl_session",
144	"ssl_sess_cert",
145	"ssl",
146	"ssl_method",
147	"rand",
148	"rand2",
149	"debug_malloc",
150	"BIO",
151	"gethostbyname",
152	"getservbyname",
153	"readdir",
154	"RSA_blinding",
155	"dh",
156	"debug_malloc2",
157	"dso",
158	"dynlock",
159	"engine",
160	"ui",
161	"ecdsa",
162	"ec",
163	"ecdh",
164	"bn",
165	"ec_pre_comp",
166	"store",
167	"comp",
168	"fips",
169	"fips2",
170	#if CRYPTO_NUM_LOCKS != 41
171	# error "Inconsistency between crypto.h and cryptlib.c"
172	#endif
173	};
174
175	/* This is for applications to allocate new type names in the non-dynamic
176	array of lock names. These are numbered with positive numbers. */
177	static STACK_OF(OPENSSL_STRING) *app_locks=NULL;
178
179	/* For applications that want a more dynamic way of handling threads, the
180	following stack is used. These are externally numbered with negative
181	numbers. */
182	static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
183
184
185	static void (MS_FAR *locking_callback)(int mode,int type,
186	const char *file,int line)=0;
187	static int (MS_FAR add_lock_callback)(int pointer,int amount,
188	int type,const char *file,int line)=0;
189	static struct CRYPTO_dynlock_value (MS_FAR dynlock_create_callback)
190	(const char *file,int line)=0;
191	static void (MS_FAR *dynlock_lock_callback)(int mode,
192	struct CRYPTO_dynlock_value l, const char file,int line)=0;
193	static void (MS_FAR dynlock_destroy_callback)(struct CRYPTO_dynlock_value l,
194	const char *file,int line)=0;
195
196	int CRYPTO_get_new_lockid(char *name)
197	{
198	char *str;
199	int i;
200
201	#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_WIN16)
202	/* A hack to make Visual C++ 5.0 work correctly when linking as
203	* a DLL using /MT. Without this, the application cannot use
204	* any floating point printf's.
205	* It also seems to be needed for Visual C 1.5 (win16) */
206	SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
207	#endif
208
209	if ((app_locks == NULL) && ((app_locks=sk_OPENSSL_STRING_new_null()) == NULL))
210	{
211	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
212	return(0);
213	}
214	if ((str=BUF_strdup(name)) == NULL)
215	{
216	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
217	return(0);
218	}
219	i=sk_OPENSSL_STRING_push(app_locks,str);
220	if (!i)
221	OPENSSL_free(str);
222	else
223	i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
224	return(i);
225	}
226
227	int CRYPTO_num_locks(void)
228	{
229	return CRYPTO_NUM_LOCKS;
230	}
231
232	int CRYPTO_get_new_dynlockid(void)
233	{
234	int i = 0;
235	CRYPTO_dynlock *pointer = NULL;
236
237	if (dynlock_create_callback == NULL)
238	{
239	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
240	return(0);
241	}
242	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
243	if ((dyn_locks == NULL)
244	&& ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
245	{
246	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
247	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
248	return(0);
249	}
250	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
251
252	pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
253	if (pointer == NULL)
254	{
255	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
256	return(0);
257	}
258	pointer->references = 1;
259	pointer->data = dynlock_create_callback(__FILE__,__LINE__);
260	if (pointer->data == NULL)
261	{
262	OPENSSL_free(pointer);
263	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
264	return(0);
265	}
266
267	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
268	/* First, try to find an existing empty slot */
269	i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
270	/* If there was none, push, thereby creating a new one */
271	if (i == -1)
272	/* Since sk_push() returns the number of items on the
273	stack, not the location of the pushed item, we need
274	to transform the returned number into a position,
275	by decreasing it. */
276	i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
277	else
278	/* If we found a place with a NULL pointer, put our pointer
279	in it. */
280	(void)sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
281	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
282
283	if (i == -1)
284	{
285	dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
286	OPENSSL_free(pointer);
287	}
288	else
289	i += 1; /* to avoid 0 */
290	return -i;
291	}
292
293	void CRYPTO_destroy_dynlockid(int i)
294	{
295	CRYPTO_dynlock *pointer = NULL;
296	if (i)
297	i = -i-1;
298	if (dynlock_destroy_callback == NULL)
299	return;
300
301	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
302
303	if (dyn_locks == NULL \|\| i >= sk_CRYPTO_dynlock_num(dyn_locks))
304	{
305	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
306	return;
307	}
308	pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
309	if (pointer != NULL)
310	{
311	--pointer->references;
312	#ifdef REF_CHECK
313	if (pointer->references < 0)
314	{
315	fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
316	abort();
317	}
318	else
319	#endif
320	if (pointer->references <= 0)
321	{
322	(void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
323	}
324	else
325	pointer = NULL;
326	}
327	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
328
329	if (pointer)
330	{
331	dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
332	OPENSSL_free(pointer);
333	}
334	}
335
336	struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
337	{
338	CRYPTO_dynlock *pointer = NULL;
339	if (i)
340	i = -i-1;
341
342	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
343
344	if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
345	pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
346	if (pointer)
347	pointer->references++;
348
349	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
350
351	if (pointer)
352	return pointer->data;
353	return NULL;
354	}
355
356	struct CRYPTO_dynlock_value (CRYPTO_get_dynlock_create_callback(void))
357	(const char *file,int line)
358	{
359	return(dynlock_create_callback);
360	}
361
362	void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
363	struct CRYPTO_dynlock_value l, const char file,int line)
364	{
365	return(dynlock_lock_callback);
366	}
367
368	void (*CRYPTO_get_dynlock_destroy_callback(void))
369	(struct CRYPTO_dynlock_value l, const char file,int line)
370	{
371	return(dynlock_destroy_callback);
372	}
373
374	void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value (func)
375	(const char *file, int line))
376	{
377	dynlock_create_callback=func;
378	}
379
380	void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
381	struct CRYPTO_dynlock_value l, const char file, int line))
382	{
383	dynlock_lock_callback=func;
384	}
385
386	void CRYPTO_set_dynlock_destroy_callback(void (*func)
387	(struct CRYPTO_dynlock_value l, const char file, int line))
388	{
389	dynlock_destroy_callback=func;
390	}
391
392
393	void (CRYPTO_get_locking_callback(void))(int mode,int type,const char file,
394	int line)
395	{
396	return(locking_callback);
397	}
398
399	int (CRYPTO_get_add_lock_callback(void))(int num,int mount,int type,
400	const char *file,int line)
401	{
402	return(add_lock_callback);
403	}
404
405	void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
406	const char *file,int line))
407	{
408	locking_callback=func;
409	}
410
411	void CRYPTO_set_add_lock_callback(int (func)(int num,int mount,int type,
412	const char *file,int line))
413	{
414	add_lock_callback=func;
415	}
416
417	void CRYPTO_lock(int mode, int type, const char *file, int line)
418	{
419	#ifdef LOCK_DEBUG
420	{
421	CRYPTO_THREADID id;
422	char rw_text,operation_text;
423
424	if (mode & CRYPTO_LOCK)
425	operation_text="lock ";
426	else if (mode & CRYPTO_UNLOCK)
427	operation_text="unlock";
428	else
429	operation_text="ERROR ";
430
431	if (mode & CRYPTO_READ)
432	rw_text="r";
433	else if (mode & CRYPTO_WRITE)
434	rw_text="w";
435	else
436	rw_text="ERROR";
437
438	CRYPTO_THREADID_current(&id);
439	fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
440	CRYPTO_THREADID_hash(&id), rw_text, operation_text,
441	CRYPTO_get_lock_name(type), file, line);
442	}
443	#endif
444	if (type < 0)
445	{
446	if (dynlock_lock_callback != NULL)
447	{
448	struct CRYPTO_dynlock_value *pointer
449	= CRYPTO_get_dynlock_value(type);
450
451	OPENSSL_assert(pointer != NULL);
452
453	dynlock_lock_callback(mode, pointer, file, line);
454
455	CRYPTO_destroy_dynlockid(type);
456	}
457	}
458	else
459	if (locking_callback != NULL)
460	locking_callback(mode,type,file,line);
461	}
462
463	int CRYPTO_add_lock(int pointer, int amount, int type, const char file,
464	int line)
465	{
466	int ret = 0;
467
468	if (add_lock_callback != NULL)
469	{
470	#ifdef LOCK_DEBUG
471	int before= *pointer;
472	#endif
473
474	ret=add_lock_callback(pointer,amount,type,file,line);
475	#ifdef LOCK_DEBUG
476	{
477	CRYPTO_THREADID id;
478	CRYPTO_THREADID_current(&id);
479	fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
480	CRYPTO_THREADID_hash(&id), before,amount,ret,
481	CRYPTO_get_lock_name(type),
482	file,line);
483	}
484	#endif
485	}
486	else
487	{
488	CRYPTO_lock(CRYPTO_LOCK\|CRYPTO_WRITE,type,file,line);
489
490	ret= *pointer+amount;
491	#ifdef LOCK_DEBUG
492	{
493	CRYPTO_THREADID id;
494	CRYPTO_THREADID_current(&id);
495	fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
496	CRYPTO_THREADID_hash(&id),
497	*pointer,amount,ret,
498	CRYPTO_get_lock_name(type),
499	file,line);
500	}
501	#endif
502	*pointer=ret;
503	CRYPTO_lock(CRYPTO_UNLOCK\|CRYPTO_WRITE,type,file,line);
504	}
505	return(ret);
506	}
507
508	const char *CRYPTO_get_lock_name(int type)
509	{
510	if (type < 0)
511	return("dynamic");
512	else if (type < CRYPTO_NUM_LOCKS)
513	return(lock_names[type]);
514	else if (type-CRYPTO_NUM_LOCKS > sk_OPENSSL_STRING_num(app_locks))
515	return("ERROR");
516	else
517	return(sk_OPENSSL_STRING_value(app_locks,type-CRYPTO_NUM_LOCKS));
518	}