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

/* crypto/cryptlib.c */
/* ====================================================================
 * Copyright (c) 1998-2003 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)
IMPLEMENT_STACK_OF(CRYPTO_dynlock)

/* real #defines in crypto.h, keep these upto date */
static const char* 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",
#if CRYPTO_NUM_LOCKS != 39
# 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 *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)=NULL;
static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
	int type,const char *file,int line)=NULL;
static unsigned long (MS_FAR *id_callback)(void)=NULL;
static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
	(const char *file,int line)=NULL;
static void (MS_FAR *dynlock_lock_callback)(int mode,
	struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
	const char *file,int line)=NULL;

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
	 * and 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_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_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.  */
		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)
				{
				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;
	}

unsigned long (*CRYPTO_get_id_callback(void))(void)
	{
	return(id_callback);
	}

void CRYPTO_set_id_callback(unsigned long (*func)(void))
	{
	id_callback=func;
	}

unsigned long CRYPTO_thread_id(void)
	{
	unsigned long ret=0;

	if (id_callback == NULL)
		{
#ifdef OPENSSL_SYS_WIN16
		ret=(unsigned long)GetCurrentTask();
#elif defined(OPENSSL_SYS_WIN32)
		ret=(unsigned long)GetCurrentThreadId();
#elif defined(GETPID_IS_MEANINGLESS)
		ret=1L;
#else
		ret=(unsigned long)getpid();
#endif
		}
	else
		ret=id_callback();
	return(ret);
	}

void CRYPTO_lock(int mode, int type, const char *file, int line)
	{
#ifdef LOCK_DEBUG
		{
		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";

		fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
			CRYPTO_thread_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
		fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
			CRYPTO_thread_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
		fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
			CRYPTO_thread_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_num(app_locks))
		return("ERROR");
	else
		return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
	}

#ifdef _DLL
#ifdef OPENSSL_SYS_WIN32

/* All we really need to do is remove the 'error' state when a thread
 * detaches */

BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
	     LPVOID lpvReserved)
	{
	switch(fdwReason)
		{
	case DLL_PROCESS_ATTACH:
		break;
	case DLL_THREAD_ATTACH:
		break;
	case DLL_THREAD_DETACH:
		ERR_remove_state(0);
		break;
	case DLL_PROCESS_DETACH:
		break;
		}
	return(TRUE);
	}
#endif

#endif

void OpenSSLDie(const char *file,int line,const char *assertion)
	{
	fprintf(stderr,
		"%s(%d): OpenSSL internal error, assertion failed: %s\n",
		file,line,assertion);
	abort();
	}
Commit	Line	Data
d02b48c6	1	/* crypto/cryptlib.c */
19b8d06a	2	/* ====================================================================
abd22c9c	3	* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
19b8d06a BM	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	*/
58964a49	55	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	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	*/
e172d60d BM	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	*/
d02b48c6	116
d02b48c6	117	#include "cryptlib.h"
c7922304	118	#include <openssl/safestack.h>
d02b48c6	119
bc36ee62	120	#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_WIN16)
58964a49 RE	121	static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
	122	#endif
	123
7ef82068 DSH	124	DECLARE_STACK_OF(CRYPTO_dynlock)
7ef82068 DSH	125	IMPLEMENT_STACK_OF(CRYPTO_dynlock)
c7922304	126
d02b48c6	127	/* real #defines in crypto.h, keep these upto date */
e778802f	128	static const char* lock_names[CRYPTO_NUM_LOCKS] =
d02b48c6 RE	129	{
	130	"<<ERROR>>",
	131	"err",
78f79235	132	"ex_data",
d02b48c6 RE	133	"x509",
	134	"x509_info",
	135	"x509_pkey",
	136	"x509_crl",
	137	"x509_req",
	138	"dsa",
	139	"rsa",
	140	"evp_pkey",
	141	"x509_store",
	142	"ssl_ctx",
	143	"ssl_cert",
	144	"ssl_session",
d36bcdf5	145	"ssl_sess_cert",
d02b48c6	146	"ssl",
e78f1378	147	"ssl_method",
d02b48c6	148	"rand",
daba492c	149	"rand2",
d02b48c6	150	"debug_malloc",
d02b48c6	151	"BIO",
2a82c7cf BM	152	"gethostbyname",
	153	"getservbyname",
	154	"readdir",
58964a49	155	"RSA_blinding",
13066cee	156	"dh",
1f575f1b	157	"debug_malloc2",
9ec0126e	158	"dso",
e73a6965	159	"dynlock",
5270e702	160	"engine",
a63d5eaa	161	"ui",
4f85a2e2 BM	162	"ecdsa",
4f85a2e2 BM	163	"ec",
e172d60d	164	"ecdh",
19b8d06a	165	"bn",
abd22c9c	166	"ec_pre_comp",
9236b5b0	167	"store",
c40b9bde RL	168	"comp",
c40b9bde RL	169	#if CRYPTO_NUM_LOCKS != 39
2a82c7cf	170	# error "Inconsistency between crypto.h and cryptlib.c"
d36bcdf5	171	#endif
d02b48c6 RE	172	};
d02b48c6 RE	173
c7922304 RL	174	/* This is for applications to allocate new type names in the non-dynamic
c7922304 RL	175	array of lock names. These are numbered with positive numbers. */
58964a49 RE	176	static STACK *app_locks=NULL;
58964a49 RE	177
c7922304 RL	178	/* For applications that want a more dynamic way of handling threads, the
	179	following stack is used. These are externally numbered with negative
	180	numbers. */
	181	static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
	182
	183
d02b48c6	184	static void (MS_FAR *locking_callback)(int mode,int type,
e778802f	185	const char *file,int line)=NULL;
d02b48c6	186	static int (MS_FAR add_lock_callback)(int pointer,int amount,
e778802f	187	int type,const char *file,int line)=NULL;
d02b48c6	188	static unsigned long (MS_FAR *id_callback)(void)=NULL;
e73a6965 RL	189	static struct CRYPTO_dynlock_value (MS_FAR dynlock_create_callback)
e73a6965 RL	190	(const char *file,int line)=NULL;
55b7688e	191	static void (MS_FAR *dynlock_lock_callback)(int mode,
e73a6965 RL	192	struct CRYPTO_dynlock_value l, const char file,int line)=NULL;
e73a6965 RL	193	static void (MS_FAR dynlock_destroy_callback)(struct CRYPTO_dynlock_value l,
c7922304	194	const char *file,int line)=NULL;
c7922304	195
6b691a5c	196	int CRYPTO_get_new_lockid(char *name)
58964a49 RE	197	{
	198	char *str;
	199	int i;
	200
bc36ee62	201	#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_WIN16)
58964a49 RE	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	* and floating point printf's.
	205	* It also seems to be needed for Visual C 1.5 (win16) */
58964a49 RE	206	SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
	207	#endif
	208
dfeab068 RE	209	if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
	210	{
	211	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
	212	return(0);
	213	}
58964a49	214	if ((str=BUF_strdup(name)) == NULL)
c7922304 RL	215	{
c7922304 RL	216	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
58964a49	217	return(0);
c7922304	218	}
58964a49 RE	219	i=sk_push(app_locks,str);
58964a49 RE	220	if (!i)
26a3a48d	221	OPENSSL_free(str);
58964a49 RE	222	else
	223	i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
	224	return(i);
	225	}
	226
a111306b BM	227	int CRYPTO_num_locks(void)
	228	{
	229	return CRYPTO_NUM_LOCKS;
	230	}
	231
c7922304 RL	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	}
e73a6965	242	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
c7922304	243	if ((dyn_locks == NULL)
7ef82068	244	&& ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
c7922304	245	{
e73a6965	246	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
c7922304 RL	247	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
	248	return(0);
	249	}
e73a6965	250	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
c7922304	251
e73a6965	252	pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
c7922304 RL	253	if (pointer == NULL)
	254	{
	255	CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
	256	return(0);
	257	}
e73a6965 RL	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);
55b7688e RL	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)
442d4230 RL	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	sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
e73a6965 RL	281	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
e73a6965 RL	282
442d4230	283	if (i == -1)
e73a6965 RL	284	{
	285	dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
	286	OPENSSL_free(pointer);
	287	}
c7922304 RL	288	else
	289	i += 1; /* to avoid 0 */
	290	return -i;
	291	}
	292
	293	void CRYPTO_destroy_dynlockid(int i)
	294	{
e73a6965	295	CRYPTO_dynlock *pointer = NULL;
c7922304 RL	296	if (i)
c7922304 RL	297	i = -i-1;
c7922304 RL	298	if (dynlock_destroy_callback == NULL)
c7922304 RL	299	return;
e73a6965 RL	300
	301	CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
	302
	303	if (dyn_locks == NULL \|\| i >= sk_CRYPTO_dynlock_num(dyn_locks))
883b0c22	304	{
bcbe4e52	305	CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
e73a6965	306	return;
883b0c22	307	}
e73a6965 RL	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
80340f1f	320	if (pointer->references <= 0)
e73a6965 RL	321	{
	322	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)
95a9fea7	330	{
e73a6965	331	dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
95a9fea7 BM	332	OPENSSL_free(pointer);
95a9fea7 BM	333	}
c7922304 RL	334	}
c7922304 RL	335
e73a6965	336	struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
c7922304	337	{
e73a6965	338	CRYPTO_dynlock *pointer = NULL;
c7922304 RL	339	if (i)
c7922304 RL	340	i = -i-1;
e73a6965 RL	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;
c7922304 RL	354	}
c7922304 RL	355
55b7688e RL	356	struct CRYPTO_dynlock_value (CRYPTO_get_dynlock_create_callback(void))
55b7688e RL	357	(const char *file,int line)
d02b48c6	358	{
55b7688e	359	return(dynlock_create_callback);
d02b48c6 RE	360	}
d02b48c6 RE	361
e73a6965 RL	362	void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
e73a6965 RL	363	struct CRYPTO_dynlock_value l, const char file,int line)
c7922304	364	{
55b7688e RL	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);
c7922304 RL	397	}
c7922304 RL	398
e778802f BL	399	int (CRYPTO_get_add_lock_callback(void))(int num,int mount,int type,
e778802f BL	400	const char *file,int line)
d02b48c6 RE	401	{
	402	return(add_lock_callback);
	403	}
	404
e778802f BL	405	void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
e778802f BL	406	const char *file,int line))
d02b48c6 RE	407	{
	408	locking_callback=func;
	409	}
	410
e778802f BL	411	void CRYPTO_set_add_lock_callback(int (func)(int num,int mount,int type,
e778802f BL	412	const char *file,int line))
d02b48c6 RE	413	{
	414	add_lock_callback=func;
	415	}
	416
73d2257d	417	unsigned long (*CRYPTO_get_id_callback(void))(void)
d02b48c6 RE	418	{
	419	return(id_callback);
	420	}
	421
73d2257d	422	void CRYPTO_set_id_callback(unsigned long (*func)(void))
d02b48c6 RE	423	{
	424	id_callback=func;
	425	}
	426
6b691a5c	427	unsigned long CRYPTO_thread_id(void)
d02b48c6 RE	428	{
	429	unsigned long ret=0;
	430
	431	if (id_callback == NULL)
	432	{
bc36ee62	433	#ifdef OPENSSL_SYS_WIN16
d02b48c6	434	ret=(unsigned long)GetCurrentTask();
bc36ee62	435	#elif defined(OPENSSL_SYS_WIN32)
d02b48c6	436	ret=(unsigned long)GetCurrentThreadId();
a7c5241f	437	#elif defined(GETPID_IS_MEANINGLESS)
d02b48c6 RE	438	ret=1L;
	439	#else
	440	ret=(unsigned long)getpid();
	441	#endif
	442	}
	443	else
	444	ret=id_callback();
	445	return(ret);
	446	}
	447
6b691a5c	448	void CRYPTO_lock(int mode, int type, const char *file, int line)
d02b48c6 RE	449	{
	450	#ifdef LOCK_DEBUG
	451	{
	452	char rw_text,operation_text;
	453
	454	if (mode & CRYPTO_LOCK)
	455	operation_text="lock ";
	456	else if (mode & CRYPTO_UNLOCK)
	457	operation_text="unlock";
	458	else
	459	operation_text="ERROR ";
	460
	461	if (mode & CRYPTO_READ)
	462	rw_text="r";
	463	else if (mode & CRYPTO_WRITE)
	464	rw_text="w";
	465	else
	466	rw_text="ERROR";
	467
	468	fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
	469	CRYPTO_thread_id(), rw_text, operation_text,
	470	CRYPTO_get_lock_name(type), file, line);
	471	}
	472	#endif
c7922304 RL	473	if (type < 0)
c7922304 RL	474	{
b9b6e14b RL	475	if (dynlock_lock_callback != NULL)
	476	{
	477	struct CRYPTO_dynlock_value *pointer
	478	= CRYPTO_get_dynlock_value(type);
e73a6965	479
b9b6e14b	480	OPENSSL_assert(pointer != NULL);
442d4230	481
55b7688e	482	dynlock_lock_callback(mode, pointer, file, line);
e73a6965	483
b9b6e14b RL	484	CRYPTO_destroy_dynlockid(type);
b9b6e14b RL	485	}
c7922304 RL	486	}
	487	else
	488	if (locking_callback != NULL)
	489	locking_callback(mode,type,file,line);
d02b48c6 RE	490	}
d02b48c6 RE	491
6b691a5c UM	492	int CRYPTO_add_lock(int pointer, int amount, int type, const char file,
6b691a5c UM	493	int line)
d02b48c6	494	{
c7922304	495	int ret = 0;
d02b48c6 RE	496
	497	if (add_lock_callback != NULL)
	498	{
	499	#ifdef LOCK_DEBUG
	500	int before= *pointer;
	501	#endif
	502
e73a6965	503	ret=add_lock_callback(pointer,amount,type,file,line);
d02b48c6 RE	504	#ifdef LOCK_DEBUG
	505	fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
	506	CRYPTO_thread_id(),
	507	before,amount,ret,
	508	CRYPTO_get_lock_name(type),
	509	file,line);
	510	#endif
d02b48c6 RE	511	}
	512	else
	513	{
	514	CRYPTO_lock(CRYPTO_LOCK\|CRYPTO_WRITE,type,file,line);
	515
	516	ret= *pointer+amount;
	517	#ifdef LOCK_DEBUG
	518	fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
	519	CRYPTO_thread_id(),
	520	*pointer,amount,ret,
	521	CRYPTO_get_lock_name(type),
	522	file,line);
	523	#endif
	524	*pointer=ret;
	525	CRYPTO_lock(CRYPTO_UNLOCK\|CRYPTO_WRITE,type,file,line);
	526	}
	527	return(ret);
	528	}
	529
6b691a5c	530	const char *CRYPTO_get_lock_name(int type)
d02b48c6	531	{
58964a49	532	if (type < 0)
c7922304	533	return("dynamic");
58964a49 RE	534	else if (type < CRYPTO_NUM_LOCKS)
58964a49 RE	535	return(lock_names[type]);
e5f4d827	536	else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
d02b48c6	537	return("ERROR");
58964a49 RE	538	else
58964a49 RE	539	return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
d02b48c6 RE	540	}
	541
	542	#ifdef _DLL
bc36ee62	543	#ifdef OPENSSL_SYS_WIN32
d02b48c6 RE	544
	545	/* All we really need to do is remove the 'error' state when a thread
	546	* detaches */
	547
6b691a5c UM	548	BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
6b691a5c UM	549	LPVOID lpvReserved)
d02b48c6 RE	550	{
	551	switch(fdwReason)
	552	{
	553	case DLL_PROCESS_ATTACH:
	554	break;
	555	case DLL_THREAD_ATTACH:
	556	break;
	557	case DLL_THREAD_DETACH:
	558	ERR_remove_state(0);
	559	break;
	560	case DLL_PROCESS_DETACH:
	561	break;
	562	}
	563	return(TRUE);
	564	}
	565	#endif
	566
	567	#endif
54a656ef BL	568
	569	void OpenSSLDie(const char file,int line,const char assertion)
	570	{
	571	fprintf(stderr,
	572	"%s(%d): OpenSSL internal error, assertion failed: %s\n",
	573	file,line,assertion);
	574	abort();
	575	}