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                 ERR_add_error_data(3, "filename(", filename, ")");
 130                 goto err;
 131                 }
 132         p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 133         if(p == NULL)
 134                 {
 135                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 136                 goto err;
 137                 }
 138         *p = h;
 139         if(!sk_push(dso->meth_data, (char *)p))
 140                 {
 141                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 142                 goto err;
 143                 }
 144         /* Success */
 145         dso->loaded_filename = filename;
 146         return(1);
 147 err:
 148         /* Cleanup !*/
 149         if(filename != NULL)
 150                 OPENSSL_free(filename);
 151         if(p != NULL)
 152                 OPENSSL_free(p);
 153         if(h != NULL)
 154                 FreeLibrary(h);
 155         return(0);
 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(!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                 ERR_add_error_data(3, "symname(", symname, ")");
 215                 return(NULL);
 216                 }
 217         return(sym);
 218         }
 219
 220 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 221         {
 222         HINSTANCE *ptr;
 223         void *sym;
 224
 225         if((dso == NULL) || (symname == NULL))
 226                 {
 227                 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 228                 return(NULL);
 229                 }
 230         if(sk_num(dso->meth_data) < 1)
 231                 {
 232                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 233                 return(NULL);
 234                 }
 235         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 236         if(ptr == NULL)
 237                 {
 238                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 239                 return(NULL);
 240                 }
 241         sym = GetProcAddress(*ptr, symname);
 242         if(sym == NULL)
 243                 {
 244                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 245                 ERR_add_error_data(3, "symname(", symname, ")");
 246                 return(NULL);
 247                 }
 248         return((DSO_FUNC_TYPE)sym);
 249         }
 250
 251 static char *win32_name_converter(DSO *dso, const char *filename)
 252         {
 253         char *translated;
 254         int len, transform;
 255
 256         len = strlen(filename);
 257         transform = ((strstr(filename, "/") == NULL) &&
 258                         (strstr(filename, "\\") == NULL) &&
 259                         (strstr(filename, ":") == NULL));
 260         if(transform)
 261                 /* We will convert this to "%s.dll" */
 262                 translated = OPENSSL_malloc(len + 5);
 263         else
 264                 /* We will simply duplicate filename */
 265                 translated = OPENSSL_malloc(len + 1);
 266         if(translated == NULL)
 267                 {
 268                 DSOerr(DSO_F_WIN32_NAME_CONVERTER,
 269                                 DSO_R_NAME_TRANSLATION_FAILED);
 270                 return(NULL);
 271                 }
 272         if(transform)
 273                 sprintf(translated, "%s.dll", filename);
 274         else
 275                 sprintf(translated, "%s", filename);
 276         return(translated);
 277         }
 278
 279 #endif /* OPENSSL_SYS_WIN32 */