1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 2016 - 2019, 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 | #include "curl_sspi.h" |
30 | #include "warnless.h" |
31 | |
32 | /* The last #include files should be: */ |
33 | #include "curl_memory.h" |
34 | #include "memdebug.h" |
35 | |
36 | LARGE_INTEGER Curl_freq; |
37 | bool Curl_isVistaOrGreater; |
38 | |
39 | /* Handle of iphlpapp.dll */ |
40 | static HMODULE s_hIpHlpApiDll = NULL; |
41 | |
42 | /* Pointer to the if_nametoindex function */ |
43 | IF_NAMETOINDEX_FN Curl_if_nametoindex = NULL; |
44 | |
45 | /* Curl_win32_init() performs win32 global initialization */ |
46 | CURLcode Curl_win32_init(long flags) |
47 | { |
48 | /* CURL_GLOBAL_WIN32 controls the *optional* part of the initialization which |
49 | is just for Winsock at the moment. Any required win32 initialization |
50 | should take place after this block. */ |
51 | if(flags & CURL_GLOBAL_WIN32) { |
52 | #ifdef USE_WINSOCK |
53 | WORD wVersionRequested; |
54 | WSADATA wsaData; |
55 | int res; |
56 | |
57 | #if defined(ENABLE_IPV6) && (USE_WINSOCK < 2) |
58 | #error IPV6_requires_winsock2 |
59 | #endif |
60 | |
61 | wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK); |
62 | |
63 | res = WSAStartup(wVersionRequested, &wsaData); |
64 | |
65 | if(res != 0) |
66 | /* Tell the user that we couldn't find a usable */ |
67 | /* winsock.dll. */ |
68 | return CURLE_FAILED_INIT; |
69 | |
70 | /* Confirm that the Windows Sockets DLL supports what we need.*/ |
71 | /* Note that if the DLL supports versions greater */ |
72 | /* than wVersionRequested, it will still return */ |
73 | /* wVersionRequested in wVersion. wHighVersion contains the */ |
74 | /* highest supported version. */ |
75 | |
76 | if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) || |
77 | HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) { |
78 | /* Tell the user that we couldn't find a usable */ |
79 | |
80 | /* winsock.dll. */ |
81 | WSACleanup(); |
82 | return CURLE_FAILED_INIT; |
83 | } |
84 | /* The Windows Sockets DLL is acceptable. Proceed. */ |
85 | #elif defined(USE_LWIPSOCK) |
86 | lwip_init(); |
87 | #endif |
88 | } /* CURL_GLOBAL_WIN32 */ |
89 | |
90 | #ifdef USE_WINDOWS_SSPI |
91 | { |
92 | CURLcode result = Curl_sspi_global_init(); |
93 | if(result) |
94 | return result; |
95 | } |
96 | #endif |
97 | |
98 | s_hIpHlpApiDll = Curl_load_library(TEXT("iphlpapi.dll" )); |
99 | if(s_hIpHlpApiDll) { |
100 | /* Get the address of the if_nametoindex function */ |
101 | IF_NAMETOINDEX_FN pIfNameToIndex = |
102 | CURLX_FUNCTION_CAST(IF_NAMETOINDEX_FN, |
103 | (GetProcAddress(s_hIpHlpApiDll, "if_nametoindex" ))); |
104 | |
105 | if(pIfNameToIndex) |
106 | Curl_if_nametoindex = pIfNameToIndex; |
107 | } |
108 | |
109 | if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT, |
110 | VERSION_GREATER_THAN_EQUAL)) { |
111 | Curl_isVistaOrGreater = TRUE; |
112 | QueryPerformanceFrequency(&Curl_freq); |
113 | } |
114 | else |
115 | Curl_isVistaOrGreater = FALSE; |
116 | |
117 | return CURLE_OK; |
118 | } |
119 | |
120 | /* Curl_win32_cleanup() is the opposite of Curl_win32_init() */ |
121 | void Curl_win32_cleanup(long init_flags) |
122 | { |
123 | if(s_hIpHlpApiDll) { |
124 | FreeLibrary(s_hIpHlpApiDll); |
125 | s_hIpHlpApiDll = NULL; |
126 | Curl_if_nametoindex = NULL; |
127 | } |
128 | |
129 | #ifdef USE_WINDOWS_SSPI |
130 | Curl_sspi_global_cleanup(); |
131 | #endif |
132 | |
133 | if(init_flags & CURL_GLOBAL_WIN32) { |
134 | #ifdef USE_WINSOCK |
135 | WSACleanup(); |
136 | #endif |
137 | } |
138 | } |
139 | |
140 | #if !defined(LOAD_WITH_ALTERED_SEARCH_PATH) |
141 | #define LOAD_WITH_ALTERED_SEARCH_PATH 0x00000008 |
142 | #endif |
143 | |
144 | #if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32) |
145 | #define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800 |
146 | #endif |
147 | |
148 | /* We use our own typedef here since some headers might lack these */ |
149 | typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD); |
150 | |
151 | /* See function definitions in winbase.h */ |
152 | #ifdef UNICODE |
153 | # ifdef _WIN32_WCE |
154 | # define LOADLIBARYEX L"LoadLibraryExW" |
155 | # else |
156 | # define LOADLIBARYEX "LoadLibraryExW" |
157 | # endif |
158 | #else |
159 | # define LOADLIBARYEX "LoadLibraryExA" |
160 | #endif |
161 | |
162 | /* |
163 | * Curl_verify_windows_version() |
164 | * |
165 | * This is used to verify if we are running on a specific windows version. |
166 | * |
167 | * Parameters: |
168 | * |
169 | * majorVersion [in] - The major version number. |
170 | * minorVersion [in] - The minor version number. |
171 | * platform [in] - The optional platform identifier. |
172 | * condition [in] - The test condition used to specifier whether we are |
173 | * checking a version less then, equal to or greater than |
174 | * what is specified in the major and minor version |
175 | * numbers. |
176 | * |
177 | * Returns TRUE if matched; otherwise FALSE. |
178 | */ |
179 | bool Curl_verify_windows_version(const unsigned int majorVersion, |
180 | const unsigned int minorVersion, |
181 | const PlatformIdentifier platform, |
182 | const VersionCondition condition) |
183 | { |
184 | bool matched = FALSE; |
185 | |
186 | #if defined(CURL_WINDOWS_APP) |
187 | /* We have no way to determine the Windows version from Windows apps, |
188 | so let's assume we're running on the target Windows version. */ |
189 | const WORD fullVersion = MAKEWORD(minorVersion, majorVersion); |
190 | const WORD targetVersion = (WORD)_WIN32_WINNT; |
191 | |
192 | switch(condition) { |
193 | case VERSION_LESS_THAN: |
194 | matched = targetVersion < fullVersion; |
195 | break; |
196 | |
197 | case VERSION_LESS_THAN_EQUAL: |
198 | matched = targetVersion <= fullVersion; |
199 | break; |
200 | |
201 | case VERSION_EQUAL: |
202 | matched = targetVersion == fullVersion; |
203 | break; |
204 | |
205 | case VERSION_GREATER_THAN_EQUAL: |
206 | matched = targetVersion >= fullVersion; |
207 | break; |
208 | |
209 | case VERSION_GREATER_THAN: |
210 | matched = targetVersion > fullVersion; |
211 | break; |
212 | } |
213 | |
214 | if(matched && (platform == PLATFORM_WINDOWS)) { |
215 | /* we're always running on PLATFORM_WINNT */ |
216 | matched = FALSE; |
217 | } |
218 | #elif !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \ |
219 | (_WIN32_WINNT < _WIN32_WINNT_WIN2K) |
220 | OSVERSIONINFO osver; |
221 | |
222 | memset(&osver, 0, sizeof(osver)); |
223 | osver.dwOSVersionInfoSize = sizeof(osver); |
224 | |
225 | /* Find out Windows version */ |
226 | if(GetVersionEx(&osver)) { |
227 | /* Verify the Operating System version number */ |
228 | switch(condition) { |
229 | case VERSION_LESS_THAN: |
230 | if(osver.dwMajorVersion < majorVersion || |
231 | (osver.dwMajorVersion == majorVersion && |
232 | osver.dwMinorVersion < minorVersion)) |
233 | matched = TRUE; |
234 | break; |
235 | |
236 | case VERSION_LESS_THAN_EQUAL: |
237 | if(osver.dwMajorVersion < majorVersion || |
238 | (osver.dwMajorVersion == majorVersion && |
239 | osver.dwMinorVersion <= minorVersion)) |
240 | matched = TRUE; |
241 | break; |
242 | |
243 | case VERSION_EQUAL: |
244 | if(osver.dwMajorVersion == majorVersion && |
245 | osver.dwMinorVersion == minorVersion) |
246 | matched = TRUE; |
247 | break; |
248 | |
249 | case VERSION_GREATER_THAN_EQUAL: |
250 | if(osver.dwMajorVersion > majorVersion || |
251 | (osver.dwMajorVersion == majorVersion && |
252 | osver.dwMinorVersion >= minorVersion)) |
253 | matched = TRUE; |
254 | break; |
255 | |
256 | case VERSION_GREATER_THAN: |
257 | if(osver.dwMajorVersion > majorVersion || |
258 | (osver.dwMajorVersion == majorVersion && |
259 | osver.dwMinorVersion > minorVersion)) |
260 | matched = TRUE; |
261 | break; |
262 | } |
263 | |
264 | /* Verify the platform identifier (if necessary) */ |
265 | if(matched) { |
266 | switch(platform) { |
267 | case PLATFORM_WINDOWS: |
268 | if(osver.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) |
269 | matched = FALSE; |
270 | break; |
271 | |
272 | case PLATFORM_WINNT: |
273 | if(osver.dwPlatformId != VER_PLATFORM_WIN32_NT) |
274 | matched = FALSE; |
275 | |
276 | default: /* like platform == PLATFORM_DONT_CARE */ |
277 | break; |
278 | } |
279 | } |
280 | } |
281 | #else |
282 | ULONGLONG cm = 0; |
283 | OSVERSIONINFOEX osver; |
284 | BYTE majorCondition; |
285 | BYTE minorCondition; |
286 | BYTE spMajorCondition; |
287 | BYTE spMinorCondition; |
288 | |
289 | switch(condition) { |
290 | case VERSION_LESS_THAN: |
291 | majorCondition = VER_LESS; |
292 | minorCondition = VER_LESS; |
293 | spMajorCondition = VER_LESS_EQUAL; |
294 | spMinorCondition = VER_LESS_EQUAL; |
295 | break; |
296 | |
297 | case VERSION_LESS_THAN_EQUAL: |
298 | majorCondition = VER_LESS_EQUAL; |
299 | minorCondition = VER_LESS_EQUAL; |
300 | spMajorCondition = VER_LESS_EQUAL; |
301 | spMinorCondition = VER_LESS_EQUAL; |
302 | break; |
303 | |
304 | case VERSION_EQUAL: |
305 | majorCondition = VER_EQUAL; |
306 | minorCondition = VER_EQUAL; |
307 | spMajorCondition = VER_GREATER_EQUAL; |
308 | spMinorCondition = VER_GREATER_EQUAL; |
309 | break; |
310 | |
311 | case VERSION_GREATER_THAN_EQUAL: |
312 | majorCondition = VER_GREATER_EQUAL; |
313 | minorCondition = VER_GREATER_EQUAL; |
314 | spMajorCondition = VER_GREATER_EQUAL; |
315 | spMinorCondition = VER_GREATER_EQUAL; |
316 | break; |
317 | |
318 | case VERSION_GREATER_THAN: |
319 | majorCondition = VER_GREATER; |
320 | minorCondition = VER_GREATER; |
321 | spMajorCondition = VER_GREATER_EQUAL; |
322 | spMinorCondition = VER_GREATER_EQUAL; |
323 | break; |
324 | |
325 | default: |
326 | return FALSE; |
327 | } |
328 | |
329 | memset(&osver, 0, sizeof(osver)); |
330 | osver.dwOSVersionInfoSize = sizeof(osver); |
331 | osver.dwMajorVersion = majorVersion; |
332 | osver.dwMinorVersion = minorVersion; |
333 | if(platform == PLATFORM_WINDOWS) |
334 | osver.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS; |
335 | else if(platform == PLATFORM_WINNT) |
336 | osver.dwPlatformId = VER_PLATFORM_WIN32_NT; |
337 | |
338 | cm = VerSetConditionMask(cm, VER_MAJORVERSION, majorCondition); |
339 | cm = VerSetConditionMask(cm, VER_MINORVERSION, minorCondition); |
340 | cm = VerSetConditionMask(cm, VER_SERVICEPACKMAJOR, spMajorCondition); |
341 | cm = VerSetConditionMask(cm, VER_SERVICEPACKMINOR, spMinorCondition); |
342 | if(platform != PLATFORM_DONT_CARE) |
343 | cm = VerSetConditionMask(cm, VER_PLATFORMID, VER_EQUAL); |
344 | |
345 | if(VerifyVersionInfo(&osver, (VER_MAJORVERSION | VER_MINORVERSION | |
346 | VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR), |
347 | cm)) |
348 | matched = TRUE; |
349 | #endif |
350 | |
351 | return matched; |
352 | } |
353 | |
354 | /* |
355 | * Curl_load_library() |
356 | * |
357 | * This is used to dynamically load DLLs using the most secure method available |
358 | * for the version of Windows that we are running on. |
359 | * |
360 | * Parameters: |
361 | * |
362 | * filename [in] - The filename or full path of the DLL to load. If only the |
363 | * filename is passed then the DLL will be loaded from the |
364 | * Windows system directory. |
365 | * |
366 | * Returns the handle of the module on success; otherwise NULL. |
367 | */ |
368 | HMODULE Curl_load_library(LPCTSTR filename) |
369 | { |
370 | #ifndef CURL_WINDOWS_APP |
371 | HMODULE hModule = NULL; |
372 | LOADLIBRARYEX_FN pLoadLibraryEx = NULL; |
373 | |
374 | /* Get a handle to kernel32 so we can access it's functions at runtime */ |
375 | HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32" )); |
376 | if(!hKernel32) |
377 | return NULL; |
378 | |
379 | /* Attempt to find LoadLibraryEx() which is only available on Windows 2000 |
380 | and above */ |
381 | pLoadLibraryEx = |
382 | CURLX_FUNCTION_CAST(LOADLIBRARYEX_FN, |
383 | (GetProcAddress(hKernel32, LOADLIBARYEX))); |
384 | |
385 | /* Detect if there's already a path in the filename and load the library if |
386 | there is. Note: Both back slashes and forward slashes have been supported |
387 | since the earlier days of DOS at an API level although they are not |
388 | supported by command prompt */ |
389 | if(_tcspbrk(filename, TEXT("\\/" ))) { |
390 | /** !checksrc! disable BANNEDFUNC 1 **/ |
391 | hModule = pLoadLibraryEx ? |
392 | pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : |
393 | LoadLibrary(filename); |
394 | } |
395 | /* Detect if KB2533623 is installed, as LOAD_LIBARY_SEARCH_SYSTEM32 is only |
396 | supported on Windows Vista, Windows Server 2008, Windows 7 and Windows |
397 | Server 2008 R2 with this patch or natively on Windows 8 and above */ |
398 | else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory" )) { |
399 | /* Load the DLL from the Windows system directory */ |
400 | hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32); |
401 | } |
402 | else { |
403 | /* Attempt to get the Windows system path */ |
404 | UINT systemdirlen = GetSystemDirectory(NULL, 0); |
405 | if(systemdirlen) { |
406 | /* Allocate space for the full DLL path (Room for the null terminator |
407 | is included in systemdirlen) */ |
408 | size_t filenamelen = _tcslen(filename); |
409 | TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen)); |
410 | if(path && GetSystemDirectory(path, systemdirlen)) { |
411 | /* Calculate the full DLL path */ |
412 | _tcscpy(path + _tcslen(path), TEXT("\\" )); |
413 | _tcscpy(path + _tcslen(path), filename); |
414 | |
415 | /* Load the DLL from the Windows system directory */ |
416 | /** !checksrc! disable BANNEDFUNC 1 **/ |
417 | hModule = pLoadLibraryEx ? |
418 | pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : |
419 | LoadLibrary(path); |
420 | |
421 | } |
422 | free(path); |
423 | } |
424 | } |
425 | return hModule; |
426 | #else |
427 | /* the Universal Windows Platform (UWP) can't do this */ |
428 | (void)filename; |
429 | return NULL; |
430 | #endif |
431 | } |
432 | |
433 | #endif /* WIN32 */ |
434 | |