1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 2016, Steve Holme, <steve_holme (at) hotmail.com>. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23 #include "curl_setup.h" 24 25 #if defined(WIN32) 26 27 #include <curl/curl.h> 28 #include "system_win32.h" 29 30 /* The last #include files should be: */ 31 #include "curl_memory.h" 32 #include "memdebug.h" 33 34 #if defined(USE_WINDOWS_SSPI) || (!defined(CURL_DISABLE_TELNET) && \ 35 defined(USE_WINSOCK)) 36 37 38 #if !defined(LOAD_WITH_ALTERED_SEARCH_PATH) 39 #define LOAD_WITH_ALTERED_SEARCH_PATH 0x00000008 40 #endif 41 42 #if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32) 43 #define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800 44 #endif 45 46 /* We use our own typedef here since some headers might lack these */ 47 typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD); 48 49 /* See function definitions in winbase.h */ 50 #ifdef UNICODE 51 # ifdef _WIN32_WCE 52 # define LOADLIBARYEX L"LoadLibraryExW" 53 # else 54 # define LOADLIBARYEX "LoadLibraryExW" 55 # endif 56 #else 57 # define LOADLIBARYEX "LoadLibraryExA" 58 #endif 59 60 #endif /* USE_WINDOWS_SSPI || (!CURL_DISABLE_TELNET && USE_WINSOCK) */ 61 62 /* 63 * Curl_verify_windows_version() 64 * 65 * This is used to verify if we are running on a specific windows version. 66 * 67 * Parameters: 68 * 69 * majorVersion [in] - The major version number. 70 * minorVersion [in] - The minor version number. 71 * platform [in] - The optional platform identifer. 72 * condition [in] - The test condition used to specifier whether we are 73 * checking a version less then, equal to or greater than 74 * what is specified in the major and minor version 75 * numbers. 76 * 77 * Returns TRUE if matched; otherwise FALSE. 78 */ 79 bool Curl_verify_windows_version(const unsigned int majorVersion, 80 const unsigned int minorVersion, 81 const PlatformIdentifier platform, 82 const VersionCondition condition) 83 { 84 bool matched = FALSE; 85 86 #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \ 87 (_WIN32_WINNT < _WIN32_WINNT_WIN2K) 88 OSVERSIONINFO osver; 89 90 memset(&osver, 0, sizeof(osver)); 91 osver.dwOSVersionInfoSize = sizeof(osver); 92 93 /* Find out Windows version */ 94 if(GetVersionEx(&osver)) { 95 /* Verify the Operating System version number */ 96 switch(condition) { 97 case VERSION_LESS_THAN: 98 if(osver.dwMajorVersion < majorVersion || 99 (osver.dwMajorVersion == majorVersion && 100 osver.dwMinorVersion < minorVersion)) 101 matched = TRUE; 102 break; 103 104 case VERSION_LESS_THAN_EQUAL: 105 if(osver.dwMajorVersion <= majorVersion && 106 osver.dwMinorVersion <= minorVersion) 107 matched = TRUE; 108 break; 109 110 case VERSION_EQUAL: 111 if(osver.dwMajorVersion == majorVersion && 112 osver.dwMinorVersion == minorVersion) 113 matched = TRUE; 114 break; 115 116 case VERSION_GREATER_THAN_EQUAL: 117 if(osver.dwMajorVersion >= majorVersion && 118 osver.dwMinorVersion >= minorVersion) 119 matched = TRUE; 120 break; 121 122 case VERSION_GREATER_THAN: 123 if(osver.dwMajorVersion > majorVersion || 124 (osver.dwMajorVersion == majorVersion && 125 osver.dwMinorVersion > minorVersion)) 126 matched = TRUE; 127 break; 128 } 129 130 /* Verify the platform identifier (if necessary) */ 131 if(matched && platform != PLATFORM_DONT_CARE) { 132 switch(platform) { 133 case PLATFORM_WINDOWS: 134 if(osver.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) 135 matched = FALSE; 136 break; 137 138 case PLATFORM_WINNT: 139 if(osver.dwPlatformId != VER_PLATFORM_WIN32_NT) 140 matched = FALSE; 141 } 142 } 143 } 144 #else 145 ULONGLONG cm = 0; 146 OSVERSIONINFOEX osver; 147 BYTE majorCondition; 148 BYTE minorCondition; 149 BYTE spMajorCondition; 150 BYTE spMinorCondition; 151 152 switch(condition) { 153 case VERSION_LESS_THAN: 154 majorCondition = VER_LESS; 155 minorCondition = VER_LESS; 156 spMajorCondition = VER_LESS_EQUAL; 157 spMinorCondition = VER_LESS_EQUAL; 158 break; 159 160 case VERSION_LESS_THAN_EQUAL: 161 majorCondition = VER_LESS_EQUAL; 162 minorCondition = VER_LESS_EQUAL; 163 spMajorCondition = VER_LESS_EQUAL; 164 spMinorCondition = VER_LESS_EQUAL; 165 break; 166 167 case VERSION_EQUAL: 168 majorCondition = VER_EQUAL; 169 minorCondition = VER_EQUAL; 170 spMajorCondition = VER_GREATER_EQUAL; 171 spMinorCondition = VER_GREATER_EQUAL; 172 break; 173 174 case VERSION_GREATER_THAN_EQUAL: 175 majorCondition = VER_GREATER_EQUAL; 176 minorCondition = VER_GREATER_EQUAL; 177 spMajorCondition = VER_GREATER_EQUAL; 178 spMinorCondition = VER_GREATER_EQUAL; 179 break; 180 181 case VERSION_GREATER_THAN: 182 majorCondition = VER_GREATER; 183 minorCondition = VER_GREATER; 184 spMajorCondition = VER_GREATER_EQUAL; 185 spMinorCondition = VER_GREATER_EQUAL; 186 break; 187 188 default: 189 return FALSE; 190 } 191 192 memset(&osver, 0, sizeof(osver)); 193 osver.dwOSVersionInfoSize = sizeof(osver); 194 osver.dwMajorVersion = majorVersion; 195 osver.dwMinorVersion = minorVersion; 196 if(platform == PLATFORM_WINDOWS) 197 osver.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS; 198 else if(platform == PLATFORM_WINNT) 199 osver.dwPlatformId = VER_PLATFORM_WIN32_NT; 200 201 cm = VerSetConditionMask(cm, VER_MAJORVERSION, majorCondition); 202 cm = VerSetConditionMask(cm, VER_MINORVERSION, minorCondition); 203 cm = VerSetConditionMask(cm, VER_SERVICEPACKMAJOR, spMajorCondition); 204 cm = VerSetConditionMask(cm, VER_SERVICEPACKMINOR, spMinorCondition); 205 if(platform != PLATFORM_DONT_CARE) 206 cm = VerSetConditionMask(cm, VER_PLATFORMID, VER_EQUAL); 207 208 if(VerifyVersionInfo(&osver, (VER_MAJORVERSION | VER_MINORVERSION | 209 VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR), 210 cm)) 211 matched = TRUE; 212 #endif 213 214 return matched; 215 } 216 217 #if defined(USE_WINDOWS_SSPI) || (!defined(CURL_DISABLE_TELNET) && \ 218 defined(USE_WINSOCK)) 219 220 /* 221 * Curl_load_library() 222 * 223 * This is used to dynamically load DLLs using the most secure method available 224 * for the version of Windows that we are running on. 225 * 226 * Parameters: 227 * 228 * filename [in] - The filename or full path of the DLL to load. If only the 229 * filename is passed then the DLL will be loaded from the 230 * Windows system directory. 231 * 232 * Returns the handle of the module on success; otherwise NULL. 233 */ 234 HMODULE Curl_load_library(LPCTSTR filename) 235 { 236 HMODULE hModule = NULL; 237 LOADLIBRARYEX_FN pLoadLibraryEx = NULL; 238 239 /* Get a handle to kernel32 so we can access it's functions at runtime */ 240 HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32")); 241 if(!hKernel32) 242 return NULL; 243 244 /* Attempt to find LoadLibraryEx() which is only available on Windows 2000 245 and above */ 246 pLoadLibraryEx = (LOADLIBRARYEX_FN) GetProcAddress(hKernel32, LOADLIBARYEX); 247 248 /* Detect if there's already a path in the filename and load the library if 249 there is. Note: Both back slashes and forward slashes have been supported 250 since the earlier days of DOS at an API level although they are not 251 supported by command prompt */ 252 if(_tcspbrk(filename, TEXT("\\/"))) { 253 /** !checksrc! disable BANNEDFUNC 1 **/ 254 hModule = pLoadLibraryEx ? 255 pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : 256 LoadLibrary(filename); 257 } 258 /* Detect if KB2533623 is installed, as LOAD_LIBARY_SEARCH_SYSTEM32 is only 259 supported on Windows Vista, Windows Server 2008, Windows 7 and Windows 260 Server 2008 R2 with this patch or natively on Windows 8 and above */ 261 else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) { 262 /* Load the DLL from the Windows system directory */ 263 hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32); 264 } 265 else { 266 /* Attempt to get the Windows system path */ 267 UINT systemdirlen = GetSystemDirectory(NULL, 0); 268 if(systemdirlen) { 269 /* Allocate space for the full DLL path (Room for the null terminator 270 is included in systemdirlen) */ 271 size_t filenamelen = _tcslen(filename); 272 TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen)); 273 if(path && GetSystemDirectory(path, systemdirlen)) { 274 /* Calculate the full DLL path */ 275 _tcscpy(path + _tcslen(path), TEXT("\\")); 276 _tcscpy(path + _tcslen(path), filename); 277 278 /* Load the DLL from the Windows system directory */ 279 /** !checksrc! disable BANNEDFUNC 1 **/ 280 hModule = pLoadLibraryEx ? 281 pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : 282 LoadLibrary(path); 283 284 } 285 free(path); 286 } 287 } 288 289 return hModule; 290 } 291 292 #endif /* USE_WINDOWS_SSPI || (!CURL_DISABLE_TELNET && USE_WINSOCK) */ 293 294 #endif /* WIN32 */ 295