Mercurial > trustbridge
annotate common/util.c @ 713:cdf8a924e480
(UI) Increase apply/quit button height. Updated translations.
author | Emanuel Schuetze <emanuel@intevation.de> |
---|---|
date | Wed, 02 Jul 2014 15:46:50 +0200 |
parents | 4ad764bfb39c |
children | 216a65d7fc4b |
rev | line source |
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404 | 1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik |
2 * Software engineering by Intevation GmbH | |
3 * | |
4 * This file is Free Software under the GNU GPL (v>=2) | |
5 * and comes with ABSOLUTELY NO WARRANTY! | |
6 * See LICENSE.txt for details. | |
7 */ | |
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8 #include "util.h" |
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9 #include "logging.h" |
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10 #include "strhelp.h" |
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11 |
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12 #ifndef _WIN32 |
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13 #include <unistd.h> |
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14 #include <sys/types.h> |
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15 #include <pwd.h> |
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16 #include <grp.h> |
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17 #include <string.h> |
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18 #else |
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19 #include <windows.h> |
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20 #endif |
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21 |
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22 #ifdef WIN32 |
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23 char * get_install_dir() |
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24 { |
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25 wchar_t wPath[MAX_PATH]; |
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26 char *utf8path = NULL; |
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27 char *dirsep = NULL; |
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28 |
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29 if (!GetModuleFileNameW (NULL, wPath, MAX_PATH - 1)) |
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30 { |
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31 PRINTLASTERROR ("Failed to obtain module file name. Path too long?"); |
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32 return NULL; |
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33 } |
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34 |
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35 /* wPath might not be 0 terminated */ |
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36 wPath[MAX_PATH - 1] = '\0'; |
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37 |
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38 utf8path = wchar_to_utf8 (wPath, wcsnlen(wPath, MAX_PATH)); |
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39 |
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40 if (utf8path == NULL) |
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41 { |
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42 ERRORPRINTF ("Failed to convert module path to utf-8"); |
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43 return NULL; |
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44 } |
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45 |
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46 /* Cut away the executable name */ |
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47 dirsep = strrchr(utf8path, '\\'); |
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48 if (dirsep == NULL) |
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49 { |
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50 ERRORPRINTF ("Failed to find directory seperator."); |
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51 return NULL; |
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52 } |
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53 *dirsep = '\0'; |
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54 return utf8path; |
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55 } |
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56 |
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57 static PSID |
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58 copy_sid(PSID from) |
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59 { |
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60 if (!from) |
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61 { |
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62 return 0; |
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63 } |
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64 |
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65 DWORD sidLength = GetLengthSid(from); |
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66 PSID to = (PSID) xmalloc(sidLength); |
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67 CopySid(sidLength, to, from); |
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68 return to; |
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69 } |
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70 |
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71 |
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72 PSID |
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73 get_process_owner(HANDLE hProcess) |
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74 { |
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75 HANDLE hToken = NULL; |
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76 PSID sid; |
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77 |
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78 if (hProcess == NULL) |
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79 { |
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80 ERRORPRINTF ("invalid call to get_process_owner"); |
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81 return NULL; |
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82 } |
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83 |
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84 OpenProcessToken(hProcess, TOKEN_READ, &hToken); |
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85 if (hToken) |
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86 { |
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87 DWORD size = 0; |
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88 PTOKEN_USER userStruct; |
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89 |
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90 // check how much space is needed |
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91 GetTokenInformation(hToken, TokenUser, NULL, 0, &size); |
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92 if (ERROR_INSUFFICIENT_BUFFER == GetLastError()) |
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93 { |
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94 userStruct = (PTOKEN_USER) xmalloc (size); |
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95 GetTokenInformation(hToken, TokenUser, userStruct, size, &size); |
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96 |
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97 sid = copy_sid(userStruct->User.Sid); |
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98 CloseHandle(hToken); |
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99 xfree (userStruct); |
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100 return sid; |
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101 } |
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102 } |
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103 return NULL; |
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104 } |
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105 #endif |
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106 |
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107 bool |
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108 is_elevated() |
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109 { |
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110 bool ret = false; |
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111 #ifndef _WIN32 |
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112 ret = (geteuid() == 0); |
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113 #else |
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114 HANDLE hToken = NULL; |
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115 if (OpenProcessToken (GetCurrentProcess(), TOKEN_QUERY, &hToken)) |
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116 { |
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117 DWORD elevation; |
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118 DWORD cbSize = sizeof (DWORD); |
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119 if (GetTokenInformation (hToken, TokenElevation, &elevation, |
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120 sizeof (TokenElevation), &cbSize)) |
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121 { |
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122 ret = elevation; |
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123 } |
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124 } |
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125 if (hToken) |
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126 CloseHandle (hToken); |
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127 #endif |
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128 return ret; |
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129 } |
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130 |
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131 bool is_admin() |
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132 { |
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133 #ifndef _WIN32 |
644
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134 struct passwd *current_user = getpwuid (geteuid()); |
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135 int ngroups = 0, |
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136 ret = 0, |
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137 i = 0; |
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138 gid_t * groups = NULL; |
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139 |
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140 if (current_user == NULL) |
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141 { |
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142 ERRORPRINTF ("Failed to obtain user information."); |
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143 return false; |
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144 } |
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145 |
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146 ret = getgrouplist (current_user->pw_name, current_user->pw_gid, NULL, |
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147 &ngroups); |
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148 |
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149 if (ret != -1 || ngroups <= 0) |
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150 { |
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151 ERRORPRINTF ("Unknown error in getgrouplist call"); |
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152 return false; |
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153 } |
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154 |
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155 groups = xmalloc (((unsigned int)ngroups) * sizeof (gid_t)); |
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156 |
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157 ret = getgrouplist (current_user->pw_name, current_user->pw_gid, groups, |
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158 &ngroups); |
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159 |
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160 if (ret != ngroups) |
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161 { |
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162 ERRORPRINTF ("Group length mismatch."); |
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163 xfree (groups); |
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164 return false; |
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165 } |
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166 |
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167 for (i = 0; i < ngroups; i++) |
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168 { |
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169 struct group *gr = getgrgid (groups[i]); |
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170 if (gr == NULL) |
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171 { |
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172 ERRORPRINTF ("Error in group enumeration"); |
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173 xfree (groups); |
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174 return false; |
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175 } |
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176 if (strcmp("sudo", gr->gr_name) == 0) |
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177 { |
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178 DEBUGPRINTF ("User is in sudo group \n"); |
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Check sudo group membership if user to determine if he can elevate privileges
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179 xfree (groups); |
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180 return true; |
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181 } |
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182 } |
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183 |
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184 DEBUGPRINTF ("User is not in sudo group"); |
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185 |
505
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186 return false; |
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187 #else |
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188 bool retval = false; |
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189 BOOL in_admin_group = FALSE; |
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190 HANDLE hToken = NULL; |
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191 HANDLE hTokenToCheck = NULL; |
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192 DWORD cbSize = 0; |
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193 TOKEN_ELEVATION_TYPE elevation; |
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194 BYTE admin_id[SECURITY_MAX_SID_SIZE]; |
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195 |
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196 if (!OpenProcessToken(GetCurrentProcess(), |
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197 TOKEN_QUERY | TOKEN_DUPLICATE, &hToken)) |
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198 { |
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199 PRINTLASTERROR ("Failed to duplicate process token.\n"); |
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200 return false; |
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201 } |
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202 |
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203 if (!GetTokenInformation(hToken, TokenElevationType, &elevation, |
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204 sizeof(elevation), &cbSize)) |
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205 { |
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206 PRINTLASTERROR ("Failed to get token information.\n"); |
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207 goto done; |
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|
208 } |
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209 |
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210 /* If limited check the the linked token instead */ |
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211 if (TokenElevationTypeLimited == elevation) |
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212 { |
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213 if (!GetTokenInformation(hToken, TokenLinkedToken, &hTokenToCheck, |
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|
214 sizeof(hTokenToCheck), &cbSize)) |
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|
215 { |
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216 PRINTLASTERROR ("Failed to get the linked token.\n"); |
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|
217 goto done; |
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|
218 } |
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219 } |
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220 |
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221 if (!hTokenToCheck) /* The linked token is already of the correct type */ |
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222 { |
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223 if (!DuplicateToken(hToken, SecurityIdentification, &hTokenToCheck)) |
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224 { |
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225 PRINTLASTERROR ("Failed to duplicate token for identification.\n"); |
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226 goto done; |
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|
227 } |
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|
228 } |
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229 |
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230 /* Do the sid dance for the adminSID */ |
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231 cbSize = sizeof(admin_id); |
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232 if (!CreateWellKnownSid(WinBuiltinAdministratorsSid, NULL, &admin_id, |
78959fd970b0
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|
233 &cbSize)) |
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|
234 { |
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|
235 PRINTLASTERROR ("Failed to get admin sid.\n"); |
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|
236 goto done; |
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Add is_admin and implement it for windows
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|
237 } |
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238 |
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239 /* The actual check */ |
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240 if (!CheckTokenMembership(hTokenToCheck, &admin_id, &in_admin_group)) |
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|
241 { |
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diff
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242 PRINTLASTERROR ("Failed to check token membership.\n"); |
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243 goto done; |
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244 } |
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245 |
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246 if (in_admin_group) |
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247 { |
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248 /* Winbool to standard bool */ |
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249 retval = true; |
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250 } |
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251 |
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252 done: |
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253 if (hToken) CloseHandle(hToken); |
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254 if (hTokenToCheck) CloseHandle(hTokenToCheck); |
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255 |
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256 return retval; |
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257 #endif |
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258 } |
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259 |