1 /*
2 * Security Management
3 *
4 * Copyright (C) 2005 Robert Shearman
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 extern const LUID SeIncreaseQuotaPrivilege;
22 extern const LUID SeSecurityPrivilege;
23 extern const LUID SeTakeOwnershipPrivilege;
24 extern const LUID SeLoadDriverPrivilege;
25 extern const LUID SeSystemProfilePrivilege;
26 extern const LUID SeSystemtimePrivilege;
27 extern const LUID SeProfileSingleProcessPrivilege;
28 extern const LUID SeIncreaseBasePriorityPrivilege;
29 extern const LUID SeCreatePagefilePrivilege;
30 extern const LUID SeBackupPrivilege;
31 extern const LUID SeRestorePrivilege;
32 extern const LUID SeShutdownPrivilege;
33 extern const LUID SeDebugPrivilege;
34 extern const LUID SeSystemEnvironmentPrivilege;
35 extern const LUID SeChangeNotifyPrivilege;
36 extern const LUID SeRemoteShutdownPrivilege;
37 extern const LUID SeUndockPrivilege;
38 extern const LUID SeManageVolumePrivilege;
39 extern const LUID SeImpersonatePrivilege;
40 extern const LUID SeCreateGlobalPrivilege;
41
42 extern const PSID security_world_sid;
43 extern const PSID security_interactive_sid;
44 extern const PSID security_local_system_sid;
45
46
47 /* token functions */
48
49 extern struct token *token_create_admin(void);
50 extern struct token *token_duplicate( struct token *src_token, unsigned primary,
51 int impersonation_level );
52 extern int token_check_privileges( struct token *token, int all_required,
53 const LUID_AND_ATTRIBUTES *reqprivs,
54 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs);
55 extern const ACL *token_get_default_dacl( struct token *token );
56 extern const SID *token_get_user( struct token *token );
57 extern const SID *token_get_primary_group( struct token *token );
58
59 static inline const ACE_HEADER *ace_next( const ACE_HEADER *ace )
60 {
61 return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
62 }
63
64 static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
65 {
66 return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
67 !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
68 }
69
70 extern void security_set_thread_token( struct thread *thread, obj_handle_t handle );
71 extern const SID *security_unix_uid_to_sid( uid_t uid );
72 extern int check_object_access( struct object *obj, unsigned int *access );
73
74 static inline int thread_single_check_privilege( struct thread *thread, const LUID *priv)
75 {
76 struct token *token = thread_get_impersonation_token( thread );
77 const LUID_AND_ATTRIBUTES privs = { *priv, 0 };
78
79 if (!token) return FALSE;
80
81 return token_check_privileges( token, TRUE, &privs, 1, NULL );
82 }
83
84
85 /* security descriptor helper functions */
86
87 extern int sd_is_valid( const struct security_descriptor *sd, data_size_t size );
88
89 /* gets the discretionary access control list from a security descriptor */
90 static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
91 {
92 *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);
93
94 if (sd->dacl_len)
95 return (const ACL *)((const char *)(sd + 1) +
96 sd->owner_len + sd->group_len + sd->sacl_len);
97 else
98 return NULL;
99 }
100
101 /* gets the system access control list from a security descriptor */
102 static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
103 {
104 *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);
105
106 if (sd->sacl_len)
107 return (const ACL *)((const char *)(sd + 1) +
108 sd->owner_len + sd->group_len);
109 else
110 return NULL;
111 }
112
113 /* gets the owner from a security descriptor */
114 static inline const SID *sd_get_owner( const struct security_descriptor *sd )
115 {
116 if (sd->owner_len)
117 return (const SID *)(sd + 1);
118 else
119 return NULL;
120 }
121
122 /* gets the primary group from a security descriptor */
123 static inline const SID *sd_get_group( const struct security_descriptor *sd )
124 {
125 if (sd->group_len)
126 return (const SID *)((const char *)(sd + 1) + sd->owner_len);
127 else
128 return NULL;
129 }
130
131 /* determines whether an object_attributes struct is valid in a buffer
132 * and calls set_error appropriately */
133 extern int objattr_is_valid( const struct object_attributes *objattr, data_size_t size );
134 static inline void objattr_get_name( const struct object_attributes *objattr, struct unicode_str *name )
135 {
136 name->len = ((objattr->name_len) / sizeof(WCHAR)) * sizeof(WCHAR);
137 name->str = (const WCHAR *)objattr + (sizeof(*objattr) + objattr->sd_len) / sizeof(WCHAR);
138 }
139
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