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annotate common/util.c @ 670:175370634226

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Move getProcessOwner to util and use it to skip the current user in locate other hives
author Andre Heinecke <andre.heinecke@intevation.de>
date Fri, 27 Jun 2014 10:27:08 +0200
parents c7a35fa302ec
children d4766b4922c9
rev   line source
404
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Andre Heinecke <aheinecke@intevation.de>
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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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
670
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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22 static PSID
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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23 copy_sid(PSID from)
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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24 {
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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25 if (!from)
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26 {
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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27 return 0;
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28 }
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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29
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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30 DWORD sidLength = GetLengthSid(from);
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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31 PSID to = (PSID) xmalloc(sidLength);
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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32 CopySid(sidLength, to, from);
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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33 return to;
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34 }
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35
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36
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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37 PSID
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38 get_process_owner(HANDLE hProcess)
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39 {
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40 HANDLE hToken = NULL;
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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41 PSID sid;
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42
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43 if (hProcess == NULL)
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44 {
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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45 ERRORPRINTF ("invalid call to get_process_owner");
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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46 return NULL;
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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47 }
175370634226 Move getProcessOwner to util and use it to skip the current user in locate other hives
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48
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49 OpenProcessToken(hProcess, TOKEN_READ, &hToken);
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50 if (hToken)
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51 {
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52 DWORD size = 0;
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53 PTOKEN_USER userStruct;
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54
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55 // check how much space is needed
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56 GetTokenInformation(hToken, TokenUser, NULL, 0, &size);
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57 if (ERROR_INSUFFICIENT_BUFFER == GetLastError())
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58 {
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59 userStruct = (PTOKEN_USER) xmalloc (size);
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60 GetTokenInformation(hToken, TokenUser, userStruct, size, &size);
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61
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62 sid = copy_sid(userStruct->User.Sid);
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63 CloseHandle(hToken);
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64 xfree (userStruct);
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65 return sid;
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66 }
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67 }
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68 return NULL;
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69 }
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70
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71 bool
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72 is_elevated()
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73 {
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74 bool ret = false;
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75 #ifndef _WIN32
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76 ret = (geteuid() == 0);
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77 #else
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78 HANDLE hToken = NULL;
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79 if (OpenProcessToken (GetCurrentProcess(), TOKEN_QUERY, &hToken))
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80 {
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81 DWORD elevation;
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82 DWORD cbSize = sizeof (DWORD);
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83 if (GetTokenInformation (hToken, TokenElevation, &elevation,
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84 sizeof (TokenElevation), &cbSize))
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85 {
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86 ret = elevation;
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87 }
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88 }
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89 if (hToken)
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90 CloseHandle (hToken);
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91 #endif
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92 return ret;
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93 }
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94
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95 bool is_admin()
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96 {
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97 #ifndef _WIN32
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98 struct passwd *current_user = getpwuid (geteuid());
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99 int ngroups = 0,
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100 ret = 0,
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101 i = 0;
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102 gid_t * groups = NULL;
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103
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104 if (current_user == NULL)
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105 {
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106 ERRORPRINTF ("Failed to obtain user information.");
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107 return false;
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108 }
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109
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110 ret = getgrouplist (current_user->pw_name, current_user->pw_gid, NULL,
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111 &ngroups);
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112
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113 if (ret != -1 || ngroups <= 0)
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114 {
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115 ERRORPRINTF ("Unknown error in getgrouplist call");
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116 return false;
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117 }
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118
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119 groups = xmalloc (((unsigned int)ngroups) * sizeof (gid_t));
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120
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121 ret = getgrouplist (current_user->pw_name, current_user->pw_gid, groups,
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122 &ngroups);
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123
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124 if (ret != ngroups)
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125 {
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126 ERRORPRINTF ("Group length mismatch.");
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127 xfree (groups);
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128 return false;
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129 }
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130
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131 for (i = 0; i < ngroups; i++)
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132 {
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133 struct group *gr = getgrgid (groups[i]);
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
134 if (gr == NULL)
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
135 {
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
136 ERRORPRINTF ("Error in group enumeration");
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
137 xfree (groups);
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
138 return false;
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
139 }
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
140 if (strcmp("sudo", gr->gr_name) == 0)
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
141 {
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
142 DEBUGPRINTF ("User is in sudo group \n");
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
143 xfree (groups);
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
144 return true;
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
145 }
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
146 }
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
147
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
148 DEBUGPRINTF ("User is not in sudo group");
c7a35fa302ec Check sudo group membership if user to determine if he can elevate privileges
Andre Heinecke <andre.heinecke@intevation.de>
parents: 505
diff changeset
149
505
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
150 return false;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
151 #else
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
152 bool retval = false;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
153 BOOL in_admin_group = FALSE;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
154 HANDLE hToken = NULL;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
155 HANDLE hTokenToCheck = NULL;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
156 DWORD cbSize = 0;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
157 TOKEN_ELEVATION_TYPE elevation;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
158 BYTE admin_id[SECURITY_MAX_SID_SIZE];
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
159
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
160 if (!OpenProcessToken(GetCurrentProcess(),
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
161 TOKEN_QUERY | TOKEN_DUPLICATE, &hToken))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
162 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
163 PRINTLASTERROR ("Failed to duplicate process token.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
164 return false;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
165 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
166
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
167 if (!GetTokenInformation(hToken, TokenElevationType, &elevation,
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
168 sizeof(elevation), &cbSize))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
169 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
170 PRINTLASTERROR ("Failed to get token information.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
171 goto done;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
172 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
173
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
174 /* If limited check the the linked token instead */
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
175 if (TokenElevationTypeLimited == elevation)
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
176 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
177 if (!GetTokenInformation(hToken, TokenLinkedToken, &hTokenToCheck,
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
178 sizeof(hTokenToCheck), &cbSize))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
179 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
180 PRINTLASTERROR ("Failed to get the linked token.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
181 goto done;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
182 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
183 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
184
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
185 if (!hTokenToCheck) /* The linked token is already of the correct type */
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
186 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
187 if (!DuplicateToken(hToken, SecurityIdentification, &hTokenToCheck))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
188 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
189 PRINTLASTERROR ("Failed to duplicate token for identification.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
190 goto done;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
191 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
192 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
193
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
194 /* Do the sid dance for the adminSID */
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
195 cbSize = sizeof(admin_id);
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
196 if (!CreateWellKnownSid(WinBuiltinAdministratorsSid, NULL, &admin_id,
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
197 &cbSize))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
198 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
199 PRINTLASTERROR ("Failed to get admin sid.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
200 goto done;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
201 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
202
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
203 /* The actual check */
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
204 if (!CheckTokenMembership(hTokenToCheck, &admin_id, &in_admin_group))
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
205 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
206 PRINTLASTERROR ("Failed to check token membership.\n");
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
207 goto done;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
208 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
209
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
210 if (in_admin_group)
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
211 {
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
212 /* Winbool to standard bool */
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
213 retval = true;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
214 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
215
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
216 done:
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
217 if (hToken) CloseHandle(hToken);
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
218 if (hTokenToCheck) CloseHandle(hTokenToCheck);
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
219
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
220 return retval;
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
221 #endif
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
222 }
78959fd970b0 Add is_admin and implement it for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 404
diff changeset
223
http://wald.intevation.org/projects/trustbridge/