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/* 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 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, const char *filename);
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 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 */
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, const char *filename)
{
HINSTANCE h, *p;
char translated[DSO_MAX_TRANSLATED_SIZE];
int len;
/* NB: This is a hideous hack, but I'm not yet sure what
* to replace it with. This attempts to convert any filename,
* that looks like it has no path information, into a
* translated form, e. "blah" -> "blah.dll" ... I'm more
* comfortable putting hacks into win32 code though ;-) */
len = strlen(filename);
if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
(len + 4 < DSO_MAX_TRANSLATED_SIZE) &&
(strstr(filename, "/") == NULL) &&
(strstr(filename, "\\") == NULL) &&
(strstr(filename, ":") == NULL))
{
sprintf(translated, "%s.dll", filename);
h = LoadLibrary(translated);
}
else
h = LoadLibrary(filename);
if(h == NULL)
{
DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
return(0);
}
p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
if(p == NULL)
{
DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
FreeLibrary(h);
return(0);
}
*p = h;
if(!sk_push(dso->meth_data, (char *)p))
{
DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
FreeLibrary(h);
OPENSSL_free(p);
return(0);
}
return(1);
}
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);
}
#endif /* WIN32 */
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