crypto/dso/dso_win32.c - third_party/openssl - Git at Google

 /* dso_win32.c */
 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
  * project 2000.
  */
 /* ====================================================================
  * Copyright (c) 2000 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
  *    licensing@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).
  *
  */

 #include <stdio.h>
 #include <string.h>
 #include "cryptlib.h"
 #include <openssl/dso.h>

 #ifndef OPENSSL_SYS_WIN32
 DSO_METHOD *DSO_METHOD_win32(void)
 	{
 	return NULL;
 	}
 #else

 /* Part of the hack in "win32_load" ... */
 #define DSO_MAX_TRANSLATED_SIZE 256

 static int win32_load(DSO *dso);
 static int win32_unload(DSO *dso);
 static void *win32_bind_var(DSO *dso, const char *symname);
 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
 #if 0
 static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
 static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
 static int win32_init(DSO *dso);
 static int win32_finish(DSO *dso);
 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
 #endif
 static char *win32_name_converter(DSO *dso, const char *filename);

 static DSO_METHOD dso_meth_win32 = {
 	"OpenSSL 'win32' shared library method",
 	win32_load,
 	win32_unload,
 	win32_bind_var,
 	win32_bind_func,
 /* For now, "unbind" doesn't exist */
 #if 0
 	NULL, /* unbind_var */
 	NULL, /* unbind_func */
 #endif
 	NULL, /* ctrl */
 	win32_name_converter,
 	NULL, /* init */
 	NULL  /* finish */
 	};

 DSO_METHOD *DSO_METHOD_win32(void)
 	{
 	return(&dso_meth_win32);
 	}

 /* For this DSO_METHOD, our meth_data STACK will contain;
  * (i) a pointer to the handle (HINSTANCE) returned from
  *     LoadLibrary(), and copied.
  */

 static int win32_load(DSO *dso)
 	{
 	HINSTANCE h = NULL, *p = NULL;
 	/* See applicable comments from dso_dl.c */
 	char *filename = DSO_convert_filename(dso, NULL);

 	if(filename == NULL)
 		{
 		DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
 		goto err;
 		}
 	h = LoadLibrary(filename);
 	if(h == NULL)
 		{
 		DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 		goto err;
 		}
 	p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 	if(p == NULL)
 		{
 		DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 		goto err;
 		}
 	*p = h;
 	if(!sk_push(dso->meth_data, (char *)p))
 		{
 		DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 		goto err;
 		}
 	/* Success */
 	dso->loaded_filename = filename;
 	return(1);
 err:
 	/* Cleanup !*/
 	if(filename != NULL)
 		OPENSSL_free(filename);
 	if(p != NULL)
 		OPENSSL_free(p);
 	if(h != NULL)
 		FreeLibrary(h);
 	return(0);
 	}

 static int win32_unload(DSO *dso)
 	{
 	HINSTANCE *p;
 	if(dso == NULL)
 		{
 		DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 		return(0);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		return(1);
 	p = (HINSTANCE *)sk_pop(dso->meth_data);
 	if(p == NULL)
 		{
 		DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 		return(0);
 		}
 	if(!FreeLibrary(*p))
 		{
 		DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 		/* We should push the value back onto the stack in
 		 * case of a retry. */
 		sk_push(dso->meth_data, (char *)p);
 		return(0);
 		}
 	/* Cleanup */
 	OPENSSL_free(p);
 	return(1);
 	}

 /* Using GetProcAddress for variables? TODO: Check this out in
  * the Win32 API docs, there's probably a variant for variables. */
 static void *win32_bind_var(DSO *dso, const char *symname)
 	{
 	HINSTANCE *ptr;
 	void *sym;

 	if((dso == NULL) || (symname == NULL))
 		{
 		DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 		return(NULL);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		{
 		DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
 		return(NULL);
 		}
 	ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
 		return(NULL);
 		}
 	sym = GetProcAddress(*ptr, symname);
 	if(sym == NULL)
 		{
 		DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
 		return(NULL);
 		}
 	return(sym);
 	}

 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 	{
 	HINSTANCE *ptr;
 	void *sym;

 	if((dso == NULL) || (symname == NULL))
 		{
 		DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 		return(NULL);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		{
 		DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 		return(NULL);
 		}
 	ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 		return(NULL);
 		}
 	sym = GetProcAddress(*ptr, symname);
 	if(sym == NULL)
 		{
 		DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 		return(NULL);
 		}
 	return((DSO_FUNC_TYPE)sym);
 	}

 static char *win32_name_converter(DSO *dso, const char *filename)
 	{
 	char *translated;
 	int len, transform;

 	len = strlen(filename);
 	transform = ((strstr(filename, "/") == NULL) &&
 			(strstr(filename, "\\") == NULL) &&
 			(strstr(filename, ":") == NULL));
 	if(transform)
 		/* We will convert this to "%s.dll" */
 		translated = OPENSSL_malloc(len + 5);
 	else
 		/* We will simply duplicate filename */
 		translated = OPENSSL_malloc(len + 1);
 	if(translated == NULL)
 		{
 		DSOerr(DSO_F_WIN32_NAME_CONVERTER,
 				DSO_R_NAME_TRANSLATION_FAILED);
 		return(NULL);
 		}
 	if(transform)
 		sprintf(translated, "%s.dll", filename);
 	else
 		sprintf(translated, "%s", filename);
 	return(translated);
 	}

 #endif /* OPENSSL_SYS_WIN32 */
	/* dso_win32.c */
	/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
	* project 2000.
	*/
	/* ====================================================================
	* Copyright (c) 2000 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
	* licensing@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).
	*
	*/

	#include <stdio.h>
	#include <string.h>
	#include "cryptlib.h"
	#include <openssl/dso.h>

	#ifndef OPENSSL_SYS_WIN32
	DSO_METHOD *DSO_METHOD_win32(void)
	{
	return NULL;
	}
	#else

	/* Part of the hack in "win32_load" ... */
	#define DSO_MAX_TRANSLATED_SIZE 256

	static int win32_load(DSO *dso);
	static int win32_unload(DSO *dso);
	static void win32_bind_var(DSO dso, const char *symname);
	static DSO_FUNC_TYPE win32_bind_func(DSO dso, const char symname);
	#if 0
	static int win32_unbind_var(DSO dso, char symname, void *symptr);
	static int win32_unbind_func(DSO dso, char symname, DSO_FUNC_TYPE symptr);
	static int win32_init(DSO *dso);
	static int win32_finish(DSO *dso);
	static long win32_ctrl(DSO dso, int cmd, long larg, void parg);
	#endif
	static char win32_name_converter(DSO dso, const char *filename);

	static DSO_METHOD dso_meth_win32 = {
	"OpenSSL 'win32' shared library method",
	win32_load,
	win32_unload,
	win32_bind_var,
	win32_bind_func,
	/* For now, "unbind" doesn't exist */
	#if 0
	NULL, /* unbind_var */
	NULL, /* unbind_func */
	#endif
	NULL, /* ctrl */
	win32_name_converter,
	NULL, /* init */
	NULL /* finish */
	};

	DSO_METHOD *DSO_METHOD_win32(void)
	{
	return(&dso_meth_win32);
	}

	/* For this DSO_METHOD, our meth_data STACK will contain;
	* (i) a pointer to the handle (HINSTANCE) returned from
	* LoadLibrary(), and copied.
	*/

	static int win32_load(DSO *dso)
	{
	HINSTANCE h = NULL, *p = NULL;
	/* See applicable comments from dso_dl.c */
	char *filename = DSO_convert_filename(dso, NULL);

	if(filename == NULL)
	{
	DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
	goto err;
	}
	h = LoadLibrary(filename);
	if(h == NULL)
	{
	DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
	goto err;
	}
	p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
	if(p == NULL)
	{
	DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
	goto err;
	}
	*p = h;
	if(!sk_push(dso->meth_data, (char *)p))
	{
	DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
	goto err;
	}
	/* Success */
	dso->loaded_filename = filename;
	return(1);
	err:
	/* Cleanup !*/
	if(filename != NULL)
	OPENSSL_free(filename);
	if(p != NULL)
	OPENSSL_free(p);
	if(h != NULL)
	FreeLibrary(h);
	return(0);
	}

	static int win32_unload(DSO *dso)
	{
	HINSTANCE *p;
	if(dso == NULL)
	{
	DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
	return(0);
	}
	if(sk_num(dso->meth_data) < 1)
	return(1);
	p = (HINSTANCE *)sk_pop(dso->meth_data);
	if(p == NULL)
	{
	DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
	return(0);
	}
	if(!FreeLibrary(*p))
	{
	DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
	/* We should push the value back onto the stack in
	* case of a retry. */
	sk_push(dso->meth_data, (char *)p);
	return(0);
	}
	/* Cleanup */
	OPENSSL_free(p);
	return(1);
	}

	/* Using GetProcAddress for variables? TODO: Check this out in
	* the Win32 API docs, there's probably a variant for variables. */
	static void win32_bind_var(DSO dso, const char *symname)
	{
	HINSTANCE *ptr;
	void *sym;

	if((dso == NULL) \|\| (symname == NULL))
	{
	DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
	return(NULL);
	}
	if(sk_num(dso->meth_data) < 1)
	{
	DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
	return(NULL);
	}
	ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
	return(NULL);
	}
	sym = GetProcAddress(*ptr, symname);
	if(sym == NULL)
	{
	DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
	return(NULL);
	}
	return(sym);
	}

	static DSO_FUNC_TYPE win32_bind_func(DSO dso, const char symname)
	{
	HINSTANCE *ptr;
	void *sym;

	if((dso == NULL) \|\| (symname == NULL))
	{
	DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
	return(NULL);
	}
	if(sk_num(dso->meth_data) < 1)
	{
	DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
	return(NULL);
	}
	ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
	return(NULL);
	}
	sym = GetProcAddress(*ptr, symname);
	if(sym == NULL)
	{
	DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
	return(NULL);
	}
	return((DSO_FUNC_TYPE)sym);
	}

	static char win32_name_converter(DSO dso, const char *filename)
	{
	char *translated;
	int len, transform;

	len = strlen(filename);
	transform = ((strstr(filename, "/") == NULL) &&
	(strstr(filename, "\\") == NULL) &&
	(strstr(filename, ":") == NULL));
	if(transform)
	/* We will convert this to "%s.dll" */
	translated = OPENSSL_malloc(len + 5);
	else
	/* We will simply duplicate filename */
	translated = OPENSSL_malloc(len + 1);
	if(translated == NULL)
	{
	DSOerr(DSO_F_WIN32_NAME_CONVERTER,
	DSO_R_NAME_TRANSLATION_FAILED);
	return(NULL);
	}
	if(transform)
	sprintf(translated, "%s.dll", filename);
	else
	sprintf(translated, "%s", filename);
	return(translated);
	}

	#endif /* OPENSSL_SYS_WIN32 */