crypto/dso/dso_win32.c

   1 /* dso_win32.c */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61 #include "cryptlib.h"
  62 #include <openssl/dso.h>
  63
  64 #ifndef WIN32
  65 DSO_METHOD *DSO_METHOD_win32(void)
  66         {
  67         return NULL;
  68         }
  69 #else
  70
  71 /* Part of the hack in "win32_load" ... */
  72 #define DSO_MAX_TRANSLATED_SIZE 256
  73
  74 static int win32_load(DSO *dso, const char *filename);
  75 static int win32_unload(DSO *dso);
  76 static int win32_bind(DSO *dso, const char *symname, void **symptr);
  77 #if 0
  78 static int win32_unbind(DSO *dso, char *symname, void *symptr);
  79 static int win32_init(DSO *dso);
  80 static int win32_finish(DSO *dso);
  81 #endif
  82 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
  83
  84 static DSO_METHOD dso_meth_win32 = {
  85         "OpenSSL 'win32' shared library method",
  86         win32_load,
  87         win32_unload,
  88         win32_bind,
  89 /* For now, "unbind" doesn't exist */
  90 #if 0
  91         NULL, /* unbind */
  92 #endif
  93         win32_ctrl,
  94         NULL, /* init */
  95         NULL  /* finish */
  96         };
  97
  98 DSO_METHOD *DSO_METHOD_win32(void)
  99         {
 100         return(&dso_meth_win32);
 101         }
 102
 103 /* For this DSO_METHOD, our meth_data STACK will contain;
 104  * (i) a pointer to the handle (HINSTANCE) returned from
 105  *     LoadLibrary(), and copied.
 106  */
 107
 108 static int win32_load(DSO *dso, const char *filename)
 109         {
 110         HINSTANCE h, *p;
 111         char translated[DSO_MAX_TRANSLATED_SIZE];
 112         int len;
 113
 114         /* NB: This is a hideous hack, but I'm not yet sure what
 115          * to replace it with. This attempts to convert any filename,
 116          * that looks like it has no path information, into a
 117          * translated form, e. "blah" -> "blah.dll" ... I'm more
 118          * comfortable putting hacks into win32 code though ;-) */
 119         len = strlen(filename);
 120         if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
 121                         (len + 4 < DSO_MAX_TRANSLATED_SIZE) &&
 122                         (strstr(filename, "/") == NULL)
 123                         (strstr(filename, "\\") == NULL)
 124                         (strstr(filename, ":") == NULL))
 125                 {
 126                 sprintf(translated, "%s.dll", filename);
 127                 h = LoadLibrary(translated);
 128                 }
 129         else
 130                 h = LoadLibrary(filename);
 131         if(h == NULL)
 132                 {
 133                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 134                 return(0);
 135                 }
 136         p = (HINSTANCE *)Malloc(sizeof(HINSTANCE));
 137         if(p == NULL)
 138                 {
 139                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 140                 FreeLibrary(h);
 141                 return(0);
 142                 }
 143         *p = h;
 144         if(!sk_push(dso->meth_data, (char *)p))
 145                 {
 146                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 147                 FreeLibrary(h);
 148                 Free(p);
 149                 return(0);
 150                 }
 151         return(1);
 152         }
 153
 154 static int win32_unload(DSO *dso)
 155         {
 156         HINSTANCE *p;
 157         if(dso == NULL)
 158                 {
 159                 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 160                 return(0);
 161                 }
 162         if(sk_num(dso->meth_data) < 1)
 163                 return(1);
 164         p = (HINSTANCE *)sk_pop(dso->meth_data);
 165         if(p == NULL)
 166                 {
 167                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 168                 return(0);
 169                 }
 170         if(!FreeLibrary(p))
 171                 {
 172                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 173                 /* We should push the value back onto the stack in
 174                  * case of a retry. */
 175                 sk_push(dso->meth_data, (char *)p);
 176                 return(0);
 177                 }
 178         /* Cleanup */
 179         Free(p);
 180         return(1);
 181         }
 182
 183 static int win32_bind(DSO *dso, const char *symname, void **symptr)
 184         {
 185         HINSTANCE *ptr;
 186         void *sym;
 187
 188         if((dso == NULL) || (symptr == NULL) || (symname == NULL))
 189                 {
 190                 DSOerr(DSO_F_WIN32_BIND,ERR_R_PASSED_NULL_PARAMETER);
 191                 return(0);
 192                 }
 193         if(sk_num(dso->meth_data) < 1)
 194                 {
 195                 DSOerr(DSO_F_WIN32_BIND,DSO_R_STACK_ERROR);
 196                 return(0);
 197                 }
 198         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 199         if(ptr == NULL)
 200                 {
 201                 DSOerr(DSO_F_WIN32_BIND,DSO_R_NULL_HANDLE);
 202                 return(0);
 203                 }
 204         sym = GetProcAddress(*ptr, symname);
 205         if(sym == NULL)
 206                 {
 207                 DSOerr(DSO_F_WIN32_BIND,DSO_R_SYM_FAILURE);
 208                 return(0);
 209                 }
 210         *symptr = sym;
 211         return(1);
 212         }
 213
 214 static int win32_ctrl(DSO *dso, int cmd, long larg, void *parg)
 215         {
 216         if(dso == NULL)
 217                 {
 218                 DSOerr(DSO_F_WIN32_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 219                 return(-1);
 220                 }
 221         switch(cmd)
 222                 {
 223         case DSO_CTRL_GET_FLAGS:
 224                 return dso->flags;
 225         case DSO_CTRL_SET_FLAGS:
 226                 dso->flags = (int)larg;
 227                 return(0);
 228         case DSO_CTRL_OR_FLAGS:
 229                 dso->flags |= (int)larg;
 230                 return(0);
 231         default:
 232                 break;
 233                 }
 234         DSOerr(DSO_F_WIN32_CTRL,DSO_R_UNKNOWN_COMMAND);
 235         return(-1);
 236         }
 237
 238 #endif /* WIN32 */