1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2016, Steve Holme, <steve_holme@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 */
Curl_verify_windows_version(const unsigned int majorVersion,const unsigned int minorVersion,const PlatformIdentifier platform,const VersionCondition condition)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(CURL_WINDOWS_APP)
87 /* We have no way to determine the Windows version from Windows apps,
88 so let's assume we're running on the target Windows version. */
89 const WORD fullVersion = MAKEWORD(minorVersion, majorVersion);
90 const WORD targetVersion = (WORD)_WIN32_WINNT;
91
92 switch(condition) {
93 case VERSION_LESS_THAN:
94 matched = targetVersion < fullVersion;
95 break;
96
97 case VERSION_LESS_THAN_EQUAL:
98 matched = targetVersion <= fullVersion;
99 break;
100
101 case VERSION_EQUAL:
102 matched = targetVersion == fullVersion;
103 break;
104
105 case VERSION_GREATER_THAN_EQUAL:
106 matched = targetVersion >= fullVersion;
107 break;
108
109 case VERSION_GREATER_THAN:
110 matched = targetVersion > fullVersion;
111 break;
112 }
113
114 if(matched && (platform == PLATFORM_WINDOWS)) {
115 /* we're always running on PLATFORM_WINNT */
116 matched = FALSE;
117 }
118 #elif !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \
119 (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
120 OSVERSIONINFO osver;
121
122 memset(&osver, 0, sizeof(osver));
123 osver.dwOSVersionInfoSize = sizeof(osver);
124
125 /* Find out Windows version */
126 if(GetVersionEx(&osver)) {
127 /* Verify the Operating System version number */
128 switch(condition) {
129 case VERSION_LESS_THAN:
130 if(osver.dwMajorVersion < majorVersion ||
131 (osver.dwMajorVersion == majorVersion &&
132 osver.dwMinorVersion < minorVersion))
133 matched = TRUE;
134 break;
135
136 case VERSION_LESS_THAN_EQUAL:
137 if(osver.dwMajorVersion <= majorVersion &&
138 osver.dwMinorVersion <= minorVersion)
139 matched = TRUE;
140 break;
141
142 case VERSION_EQUAL:
143 if(osver.dwMajorVersion == majorVersion &&
144 osver.dwMinorVersion == minorVersion)
145 matched = TRUE;
146 break;
147
148 case VERSION_GREATER_THAN_EQUAL:
149 if(osver.dwMajorVersion >= majorVersion &&
150 osver.dwMinorVersion >= minorVersion)
151 matched = TRUE;
152 break;
153
154 case VERSION_GREATER_THAN:
155 if(osver.dwMajorVersion > majorVersion ||
156 (osver.dwMajorVersion == majorVersion &&
157 osver.dwMinorVersion > minorVersion))
158 matched = TRUE;
159 break;
160 }
161
162 /* Verify the platform identifier (if necessary) */
163 if(matched) {
164 switch(platform) {
165 case PLATFORM_WINDOWS:
166 if(osver.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS)
167 matched = FALSE;
168 break;
169
170 case PLATFORM_WINNT:
171 if(osver.dwPlatformId != VER_PLATFORM_WIN32_NT)
172 matched = FALSE;
173
174 default: /* like platform == PLATFORM_DONT_CARE */
175 break;
176 }
177 }
178 }
179 #else
180 ULONGLONG cm = 0;
181 OSVERSIONINFOEX osver;
182 BYTE majorCondition;
183 BYTE minorCondition;
184 BYTE spMajorCondition;
185 BYTE spMinorCondition;
186
187 switch(condition) {
188 case VERSION_LESS_THAN:
189 majorCondition = VER_LESS;
190 minorCondition = VER_LESS;
191 spMajorCondition = VER_LESS_EQUAL;
192 spMinorCondition = VER_LESS_EQUAL;
193 break;
194
195 case VERSION_LESS_THAN_EQUAL:
196 majorCondition = VER_LESS_EQUAL;
197 minorCondition = VER_LESS_EQUAL;
198 spMajorCondition = VER_LESS_EQUAL;
199 spMinorCondition = VER_LESS_EQUAL;
200 break;
201
202 case VERSION_EQUAL:
203 majorCondition = VER_EQUAL;
204 minorCondition = VER_EQUAL;
205 spMajorCondition = VER_GREATER_EQUAL;
206 spMinorCondition = VER_GREATER_EQUAL;
207 break;
208
209 case VERSION_GREATER_THAN_EQUAL:
210 majorCondition = VER_GREATER_EQUAL;
211 minorCondition = VER_GREATER_EQUAL;
212 spMajorCondition = VER_GREATER_EQUAL;
213 spMinorCondition = VER_GREATER_EQUAL;
214 break;
215
216 case VERSION_GREATER_THAN:
217 majorCondition = VER_GREATER;
218 minorCondition = VER_GREATER;
219 spMajorCondition = VER_GREATER_EQUAL;
220 spMinorCondition = VER_GREATER_EQUAL;
221 break;
222
223 default:
224 return FALSE;
225 }
226
227 memset(&osver, 0, sizeof(osver));
228 osver.dwOSVersionInfoSize = sizeof(osver);
229 osver.dwMajorVersion = majorVersion;
230 osver.dwMinorVersion = minorVersion;
231 if(platform == PLATFORM_WINDOWS)
232 osver.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS;
233 else if(platform == PLATFORM_WINNT)
234 osver.dwPlatformId = VER_PLATFORM_WIN32_NT;
235
236 cm = VerSetConditionMask(cm, VER_MAJORVERSION, majorCondition);
237 cm = VerSetConditionMask(cm, VER_MINORVERSION, minorCondition);
238 cm = VerSetConditionMask(cm, VER_SERVICEPACKMAJOR, spMajorCondition);
239 cm = VerSetConditionMask(cm, VER_SERVICEPACKMINOR, spMinorCondition);
240 if(platform != PLATFORM_DONT_CARE)
241 cm = VerSetConditionMask(cm, VER_PLATFORMID, VER_EQUAL);
242
243 if(VerifyVersionInfo(&osver, (VER_MAJORVERSION | VER_MINORVERSION |
244 VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR),
245 cm))
246 matched = TRUE;
247 #endif
248
249 return matched;
250 }
251
252 #if defined(USE_WINDOWS_SSPI) || (!defined(CURL_DISABLE_TELNET) && \
253 defined(USE_WINSOCK))
254
255 /*
256 * Curl_load_library()
257 *
258 * This is used to dynamically load DLLs using the most secure method available
259 * for the version of Windows that we are running on.
260 *
261 * Parameters:
262 *
263 * filename [in] - The filename or full path of the DLL to load. If only the
264 * filename is passed then the DLL will be loaded from the
265 * Windows system directory.
266 *
267 * Returns the handle of the module on success; otherwise NULL.
268 */
Curl_load_library(LPCTSTR filename)269 HMODULE Curl_load_library(LPCTSTR filename)
270 {
271 HMODULE hModule = NULL;
272 LOADLIBRARYEX_FN pLoadLibraryEx = NULL;
273
274 /* Get a handle to kernel32 so we can access it's functions at runtime */
275 HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32"));
276 if(!hKernel32)
277 return NULL;
278
279 /* Attempt to find LoadLibraryEx() which is only available on Windows 2000
280 and above */
281 pLoadLibraryEx = (LOADLIBRARYEX_FN) GetProcAddress(hKernel32, LOADLIBARYEX);
282
283 /* Detect if there's already a path in the filename and load the library if
284 there is. Note: Both back slashes and forward slashes have been supported
285 since the earlier days of DOS at an API level although they are not
286 supported by command prompt */
287 if(_tcspbrk(filename, TEXT("\\/"))) {
288 /** !checksrc! disable BANNEDFUNC 1 **/
289 hModule = pLoadLibraryEx ?
290 pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
291 LoadLibrary(filename);
292 }
293 /* Detect if KB2533623 is installed, as LOAD_LIBARY_SEARCH_SYSTEM32 is only
294 supported on Windows Vista, Windows Server 2008, Windows 7 and Windows
295 Server 2008 R2 with this patch or natively on Windows 8 and above */
296 else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) {
297 /* Load the DLL from the Windows system directory */
298 hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
299 }
300 else {
301 /* Attempt to get the Windows system path */
302 UINT systemdirlen = GetSystemDirectory(NULL, 0);
303 if(systemdirlen) {
304 /* Allocate space for the full DLL path (Room for the null terminator
305 is included in systemdirlen) */
306 size_t filenamelen = _tcslen(filename);
307 TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen));
308 if(path && GetSystemDirectory(path, systemdirlen)) {
309 /* Calculate the full DLL path */
310 _tcscpy(path + _tcslen(path), TEXT("\\"));
311 _tcscpy(path + _tcslen(path), filename);
312
313 /* Load the DLL from the Windows system directory */
314 /** !checksrc! disable BANNEDFUNC 1 **/
315 hModule = pLoadLibraryEx ?
316 pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
317 LoadLibrary(path);
318
319 }
320 free(path);
321 }
322 }
323
324 return hModule;
325 }
326
327 #endif /* USE_WINDOWS_SSPI || (!CURL_DISABLE_TELNET && USE_WINSOCK) */
328
329 #endif /* WIN32 */
330