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 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 #endif
  84 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
  85
  86 static DSO_METHOD dso_meth_win32 = {
  87         "OpenSSL 'win32' shared library method",
  88         win32_load,
  89         win32_unload,
  90         win32_bind_var,
  91         win32_bind_func,
  92 /* For now, "unbind" doesn't exist */
  93 #if 0
  94         NULL, /* unbind_var */
  95         NULL, /* unbind_func */
  96 #endif
  97         win32_ctrl,
  98         NULL, /* init */
  99         NULL  /* finish */
 100         };
 101
 102 DSO_METHOD *DSO_METHOD_win32(void)
 103         {
 104         return(&dso_meth_win32);
 105         }
 106
 107 /* For this DSO_METHOD, our meth_data STACK will contain;
 108  * (i) a pointer to the handle (HINSTANCE) returned from
 109  *     LoadLibrary(), and copied.
 110  */
 111
 112 static int win32_load(DSO *dso, const char *filename)
 113         {
 114         HINSTANCE h, *p;
 115         char translated[DSO_MAX_TRANSLATED_SIZE];
 116         int len;
 117
 118         /* NB: This is a hideous hack, but I'm not yet sure what
 119          * to replace it with. This attempts to convert any filename,
 120          * that looks like it has no path information, into a
 121          * translated form, e. "blah" -> "blah.dll" ... I'm more
 122          * comfortable putting hacks into win32 code though ;-) */
 123         len = strlen(filename);
 124         if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
 125                         (len + 4 < DSO_MAX_TRANSLATED_SIZE) &&
 126                         (strstr(filename, "/") == NULL) &&
 127                         (strstr(filename, "\\") == NULL) &&
 128                         (strstr(filename, ":") == NULL))
 129                 {
 130                 sprintf(translated, "%s.dll", filename);
 131                 h = LoadLibrary(translated);
 132                 }
 133         else
 134                 h = LoadLibrary(filename);
 135         if(h == NULL)
 136                 {
 137                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 138                 return(0);
 139                 }
 140         p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 141         if(p == NULL)
 142                 {
 143                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 144                 OPENSSL_freeLibrary(h);
 145                 return(0);
 146                 }
 147         *p = h;
 148         if(!sk_push(dso->meth_data, (char *)p))
 149                 {
 150                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 151                 OPENSSL_freeLibrary(h);
 152                 OPENSSL_free(p);
 153                 return(0);
 154                 }
 155         return(1);
 156         }
 157
 158 static int win32_unload(DSO *dso)
 159         {
 160         HINSTANCE *p;
 161         if(dso == NULL)
 162                 {
 163                 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 164                 return(0);
 165                 }
 166         if(sk_num(dso->meth_data) < 1)
 167                 return(1);
 168         p = (HINSTANCE *)sk_pop(dso->meth_data);
 169         if(p == NULL)
 170                 {
 171                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 172                 return(0);
 173                 }
 174         if(!OPENSSL_freeLibrary(p))
 175                 {
 176                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 177                 /* We should push the value back onto the stack in
 178                  * case of a retry. */
 179                 sk_push(dso->meth_data, (char *)p);
 180                 return(0);
 181                 }
 182         /* Cleanup */
 183         OPENSSL_free(p);
 184         return(1);
 185         }
 186
 187 /* Using GetProcAddress for variables? TODO: Check this out in
 188  * the Win32 API docs, there's probably a variant for variables. */
 189 static void *win32_bind_var(DSO *dso, const char *symname)
 190         {
 191         HINSTANCE *ptr;
 192         void *sym;
 193
 194         if((dso == NULL) || (symname == NULL))
 195                 {
 196                 DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 197                 return(NULL);
 198                 }
 199         if(sk_num(dso->meth_data) < 1)
 200                 {
 201                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
 202                 return(NULL);
 203                 }
 204         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 205         if(ptr == NULL)
 206                 {
 207                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
 208                 return(NULL);
 209                 }
 210         sym = GetProcAddress(*ptr, symname);
 211         if(sym == NULL)
 212                 {
 213                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
 214                 return(NULL);
 215                 }
 216         return(sym);
 217         }
 218
 219 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 220         {
 221         HINSTANCE *ptr;
 222         void *sym;
 223
 224         if((dso == NULL) || (symname == NULL))
 225                 {
 226                 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 227                 return(NULL);
 228                 }
 229         if(sk_num(dso->meth_data) < 1)
 230                 {
 231                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 232                 return(NULL);
 233                 }
 234         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 235         if(ptr == NULL)
 236                 {
 237                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 238                 return(NULL);
 239                 }
 240         sym = GetProcAddress(*ptr, symname);
 241         if(sym == NULL)
 242                 {
 243                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 244                 return(NULL);
 245                 }
 246         return((DSO_FUNC_TYPE)sym);
 247         }
 248
 249 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg)
 250         {
 251         if(dso == NULL)
 252                 {
 253                 DSOerr(DSO_F_WIN32_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 254                 return(-1);
 255                 }
 256         switch(cmd)
 257                 {
 258         case DSO_CTRL_GET_FLAGS:
 259                 return dso->flags;
 260         case DSO_CTRL_SET_FLAGS:
 261                 dso->flags = (int)larg;
 262                 return(0);
 263         case DSO_CTRL_OR_FLAGS:
 264                 dso->flags |= (int)larg;
 265                 return(0);
 266         default:
 267                 break;
 268                 }
 269         DSOerr(DSO_F_WIN32_CTRL,DSO_R_UNKNOWN_COMMAND);
 270         return(-1);
 271         }
 272
 273 #endif /* WIN32 */