Mercurial > trustbridge
annotate common/util.c @ 754:27043d74dc90
(Issue25) Align header contents in their own column.
We now also stretch column 3 so that the contents are aligned
with the descriptive labels without a space in between.
Sadly this causes the quit button to be resized to it's minimum
instead of sharing the space with the installation button as the
installation button is so large that it squeezes the push button.
author | Andre Heinecke <andre.heinecke@intevation.de> |
---|---|
date | Mon, 07 Jul 2014 12:38:33 +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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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, |
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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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|
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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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 |