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#if !defined(DSO_WIN32) 65DSO_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 74static int win32_load(DSO *dso); 75static int win32_unload(DSO *dso); 76static void *win32_bind_var(DSO *dso, const char *symname); 77static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname); 78#if 0 79static int win32_unbind_var(DSO *dso, char *symname, void *symptr); 80static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr); 81static int win32_init(DSO *dso); 82static int win32_finish(DSO *dso); 83static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg); 84#endif 85static char *win32_name_converter(DSO *dso, const char *filename); 86 87static 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 104DSO_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 114static 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); 147err: 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 158static 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. */ 189static 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 220static 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 251static 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 */ 280