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 OPENSSL_SYS_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);
  75 static int win32_unload(DSO *dso);
  76 static void *win32_bind_var(DSO *dso, const char *symname);
  77 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
  78 #if 0
  79 static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
  80 static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
  81 static int win32_init(DSO *dso);
  82 static int win32_finish(DSO *dso);
  83 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
  84 #endif
  85 static char *win32_name_converter(DSO *dso, const char *filename);
  86
  87 static DSO_METHOD dso_meth_win32 = {
  88         "OpenSSL 'win32' shared library method",
  89         win32_load,
  90         win32_unload,
  91         win32_bind_var,
  92         win32_bind_func,
  93 /* For now, "unbind" doesn't exist */
  94 #if 0
  95         NULL, /* unbind_var */
  96         NULL, /* unbind_func */
  97 #endif
  98         NULL, /* ctrl */
  99         win32_name_converter,
 100         NULL, /* init */
 101         NULL  /* finish */
 102         };
 103
 104 DSO_METHOD *DSO_METHOD_win32(void)
 105         {
 106         return(&dso_meth_win32);
 107         }
 108
 109 /* For this DSO_METHOD, our meth_data STACK will contain;
 110  * (i) a pointer to the handle (HINSTANCE) returned from
 111  *     LoadLibrary(), and copied.
 112  */
 113
 114 static int win32_load(DSO *dso)
 115         {
 116         HINSTANCE h = NULL, *p = NULL;
 117         /* See applicable comments from dso_dl.c */
 118         char *filename = DSO_convert_filename(dso, NULL);
 119
 120         if(filename == NULL)
 121                 {
 122                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
 123                 goto err;
 124                 }
 125         h = LoadLibrary(filename);
 126         if(h == NULL)
 127                 {
 128                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 129                 goto err;
 130                 }
 131         p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 132         if(p == NULL)
 133                 {
 134                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 135                 goto err;
 136                 }
 137         *p = h;
 138         if(!sk_push(dso->meth_data, (char *)p))
 139                 {
 140                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 141                 goto err;
 142                 }
 143         /* Success */
 144         dso->loaded_filename = filename;
 145         return(1);
 146 err:
 147         /* Cleanup !*/
 148         if(filename != NULL)
 149                 OPENSSL_free(filename);
 150         if(p != NULL)
 151                 OPENSSL_free(p);
 152         if(h != NULL)
 153                 FreeLibrary(h);
 154         return(0);
 155         }
 156
 157 static int win32_unload(DSO *dso)
 158         {
 159         HINSTANCE *p;
 160         if(dso == NULL)
 161                 {
 162                 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 163                 return(0);
 164                 }
 165         if(sk_num(dso->meth_data) < 1)
 166                 return(1);
 167         p = (HINSTANCE *)sk_pop(dso->meth_data);
 168         if(p == NULL)
 169                 {
 170                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 171                 return(0);
 172                 }
 173         if(!FreeLibrary(*p))
 174                 {
 175                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 176                 /* We should push the value back onto the stack in
 177                  * case of a retry. */
 178                 sk_push(dso->meth_data, (char *)p);
 179                 return(0);
 180                 }
 181         /* Cleanup */
 182         OPENSSL_free(p);
 183         return(1);
 184         }
 185
 186 /* Using GetProcAddress for variables? TODO: Check this out in
 187  * the Win32 API docs, there's probably a variant for variables. */
 188 static void *win32_bind_var(DSO *dso, const char *symname)
 189         {
 190         HINSTANCE *ptr;
 191         void *sym;
 192
 193         if((dso == NULL) || (symname == NULL))
 194                 {
 195                 DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 196                 return(NULL);
 197                 }
 198         if(sk_num(dso->meth_data) < 1)
 199                 {
 200                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
 201                 return(NULL);
 202                 }
 203         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 204         if(ptr == NULL)
 205                 {
 206                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
 207                 return(NULL);
 208                 }
 209         sym = GetProcAddress(*ptr, symname);
 210         if(sym == NULL)
 211                 {
 212                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
 213                 return(NULL);
 214                 }
 215         return(sym);
 216         }
 217
 218 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 219         {
 220         HINSTANCE *ptr;
 221         void *sym;
 222
 223         if((dso == NULL) || (symname == NULL))
 224                 {
 225                 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 226                 return(NULL);
 227                 }
 228         if(sk_num(dso->meth_data) < 1)
 229                 {
 230                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 231                 return(NULL);
 232                 }
 233         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 234         if(ptr == NULL)
 235                 {
 236                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 237                 return(NULL);
 238                 }
 239         sym = GetProcAddress(*ptr, symname);
 240         if(sym == NULL)
 241                 {
 242                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 243                 return(NULL);
 244                 }
 245         return((DSO_FUNC_TYPE)sym);
 246         }
 247
 248 static char *win32_name_converter(DSO *dso, const char *filename)
 249         {
 250         char *translated;
 251         int len, transform;
 252
 253         len = strlen(filename);
 254         transform = ((strstr(filename, "/") == NULL) &&
 255                         (strstr(filename, "\\") == NULL) &&
 256                         (strstr(filename, ":") == NULL));
 257         if(transform)
 258                 /* We will convert this to "%s.dll" */
 259                 translated = OPENSSL_malloc(len + 5);
 260         else
 261                 /* We will simply duplicate filename */
 262                 translated = OPENSSL_malloc(len + 1);
 263         if(translated == NULL)
 264                 {
 265                 DSOerr(DSO_F_WIN32_NAME_CONVERTER,
 266                                 DSO_R_NAME_TRANSLATION_FAILED);
 267                 return(NULL);
 268                 }
 269         if(transform)
 270                 sprintf(translated, "%s.dll", filename);
 271         else
 272                 sprintf(translated, "%s", filename);
 273         return(translated);
 274         }
 275
 276 #endif /* OPENSSL_SYS_WIN32 */