1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/base/win32.h"
29 #include <algorithm>
30
31 #include "talk/base/basictypes.h"
32 #include "talk/base/common.h"
33
34 namespace talk_base {
35
36 //
37 // Unix time is in seconds relative to 1/1/1970. So we compute the windows
38 // FILETIME of that time/date, then we add/subtract in appropriate units to
39 // convert to/from unix time.
40 // The units of FILETIME are 100ns intervals, so by multiplying by or dividing
41 // by 10000000, we can convert to/from seconds.
42 //
43 // FileTime = UnixTime*10000000 + FileTime(1970)
44 // UnixTime = (FileTime-FileTime(1970))/10000000
45 //
46
FileTimeToUnixTime(const FILETIME & ft,time_t * ut)47 void FileTimeToUnixTime(const FILETIME& ft, time_t* ut) {
48 ASSERT(NULL != ut);
49
50 // FILETIME has an earlier date base than time_t (1/1/1970), so subtract off
51 // the difference.
52 SYSTEMTIME base_st;
53 memset(&base_st, 0, sizeof(base_st));
54 base_st.wDay = 1;
55 base_st.wMonth = 1;
56 base_st.wYear = 1970;
57
58 FILETIME base_ft;
59 SystemTimeToFileTime(&base_st, &base_ft);
60
61 ULARGE_INTEGER base_ul, current_ul;
62 memcpy(&base_ul, &base_ft, sizeof(FILETIME));
63 memcpy(¤t_ul, &ft, sizeof(FILETIME));
64
65 // Divide by big number to convert to seconds, then subtract out the 1970
66 // base date value.
67 const ULONGLONG RATIO = 10000000;
68 *ut = static_cast<time_t>((current_ul.QuadPart - base_ul.QuadPart) / RATIO);
69 }
70
UnixTimeToFileTime(const time_t & ut,FILETIME * ft)71 void UnixTimeToFileTime(const time_t& ut, FILETIME* ft) {
72 ASSERT(NULL != ft);
73
74 // FILETIME has an earlier date base than time_t (1/1/1970), so add in
75 // the difference.
76 SYSTEMTIME base_st;
77 memset(&base_st, 0, sizeof(base_st));
78 base_st.wDay = 1;
79 base_st.wMonth = 1;
80 base_st.wYear = 1970;
81
82 FILETIME base_ft;
83 SystemTimeToFileTime(&base_st, &base_ft);
84
85 ULARGE_INTEGER base_ul;
86 memcpy(&base_ul, &base_ft, sizeof(FILETIME));
87
88 // Multiply by big number to convert to 100ns units, then add in the 1970
89 // base date value.
90 const ULONGLONG RATIO = 10000000;
91 ULARGE_INTEGER current_ul;
92 current_ul.QuadPart = base_ul.QuadPart + static_cast<int64>(ut) * RATIO;
93 memcpy(ft, ¤t_ul, sizeof(FILETIME));
94 }
95
Utf8ToWindowsFilename(const std::string & utf8,std::wstring * filename)96 bool Utf8ToWindowsFilename(const std::string& utf8, std::wstring* filename) {
97 // TODO: Integrate into fileutils.h
98 // TODO: Handle wide and non-wide cases via TCHAR?
99 // TODO: Skip \\?\ processing if the length is not > MAX_PATH?
100 // TODO: Write unittests
101
102 // Convert to Utf16
103 int wlen = ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1,
104 NULL, 0);
105 if (0 == wlen) {
106 return false;
107 }
108 wchar_t* wfilename = STACK_ARRAY(wchar_t, wlen);
109 if (0 == ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1,
110 wfilename, wlen)) {
111 return false;
112 }
113 // Replace forward slashes with backslashes
114 std::replace(wfilename, wfilename + wlen, L'/', L'\\');
115 // Convert to complete filename
116 DWORD full_len = ::GetFullPathName(wfilename, 0, NULL, NULL);
117 if (0 == full_len) {
118 return false;
119 }
120 wchar_t* filepart = NULL;
121 wchar_t* full_filename = STACK_ARRAY(wchar_t, full_len + 6);
122 wchar_t* start = full_filename + 6;
123 if (0 == ::GetFullPathName(wfilename, full_len, start, &filepart)) {
124 return false;
125 }
126 // Add long-path prefix
127 const wchar_t kLongPathPrefix[] = L"\\\\?\\UNC";
128 if ((start[0] != L'\\') || (start[1] != L'\\')) {
129 // Non-unc path: <pathname>
130 // Becomes: \\?\<pathname>
131 start -= 4;
132 ASSERT(start >= full_filename);
133 memcpy(start, kLongPathPrefix, 4 * sizeof(wchar_t));
134 } else if (start[2] != L'?') {
135 // Unc path: \\<server>\<pathname>
136 // Becomes: \\?\UNC\<server>\<pathname>
137 start -= 6;
138 ASSERT(start >= full_filename);
139 memcpy(start, kLongPathPrefix, 7 * sizeof(wchar_t));
140 } else {
141 // Already in long-path form.
142 }
143 filename->assign(start);
144 return true;
145 }
146
GetOsVersion(int * major,int * minor,int * build)147 bool GetOsVersion(int* major, int* minor, int* build) {
148 OSVERSIONINFO info = {0};
149 info.dwOSVersionInfoSize = sizeof(info);
150 if (GetVersionEx(&info)) {
151 if (major) *major = info.dwMajorVersion;
152 if (minor) *minor = info.dwMinorVersion;
153 if (build) *build = info.dwBuildNumber;
154 return true;
155 }
156 return false;
157 }
158
GetCurrentProcessIntegrityLevel(int * level)159 bool GetCurrentProcessIntegrityLevel(int* level) {
160 bool ret = false;
161 HANDLE process = GetCurrentProcess(), token;
162 if (OpenProcessToken(process, TOKEN_QUERY | TOKEN_QUERY_SOURCE, &token)) {
163 DWORD size;
164 if (!GetTokenInformation(token, TokenIntegrityLevel, NULL, 0, &size) &&
165 GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
166
167 char* buf = STACK_ARRAY(char, size);
168 TOKEN_MANDATORY_LABEL* til =
169 reinterpret_cast<TOKEN_MANDATORY_LABEL*>(buf);
170 if (GetTokenInformation(token, TokenIntegrityLevel, til, size, &size)) {
171
172 DWORD count = *GetSidSubAuthorityCount(til->Label.Sid);
173 *level = *GetSidSubAuthority(til->Label.Sid, count - 1);
174 ret = true;
175 }
176 }
177 CloseHandle(token);
178 }
179 return ret;
180 }
181
182 } // namespace talk_base
183
184