1 /* security.h: security declarations
3 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 2010, 2011 Red Hat, Inc.
6 This file is part of Cygwin.
8 This software is a copyrighted work licensed under the terms of the
9 Cygwin license. Please consult the file "CYGWIN_LICENSE" for
17 /* Special file attribute set, for instance, in open() and mkdir() to
18 flag that a file has just been created. Used in alloc_sd, see there. */
19 #define S_JUSTCREATED 0x80000000
21 #define DEFAULT_UID DOMAIN_USER_RID_ADMIN
22 #define UNKNOWN_UID 400 /* Non conflicting number */
23 #define UNKNOWN_GID 401
25 #define MAX_SID_LEN 40
26 #define MAX_DACL_LEN(n) (sizeof (ACL) \
27 + (n) * (sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD) + MAX_SID_LEN))
28 #define SD_MIN_SIZE (sizeof (SECURITY_DESCRIPTOR) + MAX_DACL_LEN (1))
29 #define ACL_MAXIMUM_SIZE 65532 /* Yeah, right. 64K - sizeof (DWORD). */
30 #define SD_MAXIMUM_SIZE 65536
31 #define NO_SID ((PSID)NULL)
33 #ifndef SE_CREATE_TOKEN_PRIVILEGE
34 #define SE_CREATE_TOKEN_PRIVILEGE 2UL
35 #define SE_ASSIGNPRIMARYTOKEN_PRIVILEGE 3UL
36 #define SE_LOCK_MEMORY_PRIVILEGE 4UL
37 #define SE_INCREASE_QUOTA_PRIVILEGE 5UL
38 #define SE_MACHINE_ACCOUNT_PRIVILEGE 6UL
39 #define SE_TCB_PRIVILEGE 7UL
40 #define SE_SECURITY_PRIVILEGE 8UL
41 #define SE_TAKE_OWNERSHIP_PRIVILEGE 9UL
42 #define SE_LOAD_DRIVER_PRIVILEGE 10UL
43 #define SE_SYSTEM_PROFILE_PRIVILEGE 11UL
44 #define SE_SYSTEMTIME_PRIVILEGE 12UL
45 #define SE_PROF_SINGLE_PROCESS_PRIVILEGE 13UL
46 #define SE_INC_BASE_PRIORITY_PRIVILEGE 14UL
47 #define SE_CREATE_PAGEFILE_PRIVILEGE 15UL
48 #define SE_CREATE_PERMANENT_PRIVILEGE 16UL
49 #define SE_BACKUP_PRIVILEGE 17UL
50 #define SE_RESTORE_PRIVILEGE 18UL
51 #define SE_SHUTDOWN_PRIVILEGE 19UL
52 #define SE_DEBUG_PRIVILEGE 20UL
53 #define SE_AUDIT_PRIVILEGE 21UL
54 #define SE_SYSTEM_ENVIRONMENT_PRIVILEGE 22UL
55 #define SE_CHANGE_NOTIFY_PRIVILEGE 23UL
56 #define SE_REMOTE_SHUTDOWN_PRIVILEGE 24UL
57 /* Starting with Windows 2000 */
58 #define SE_UNDOCK_PRIVILEGE 25UL
59 #define SE_SYNC_AGENT_PRIVILEGE 26UL
60 #define SE_ENABLE_DELEGATION_PRIVILEGE 27UL
61 #define SE_MANAGE_VOLUME_PRIVILEGE 28UL
62 /* Starting with Windows 2000 SP4, XP SP2, 2003 Server */
63 #define SE_IMPERSONATE_PRIVILEGE 29UL
64 #define SE_CREATE_GLOBAL_PRIVILEGE 30UL
65 /* Starting with Vista */
66 #define SE_TRUSTED_CREDMAN_ACCESS_PRIVILEGE 31UL
67 #define SE_RELABEL_PRIVILEGE 32UL
68 #define SE_INCREASE_WORKING_SET_PRIVILEGE 33UL
69 #define SE_TIME_ZONE_PRIVILEGE 34UL
70 #define SE_CREATE_SYMBOLIC_LINK_PRIVILEGE 35UL
72 #define SE_MAX_WELL_KNOWN_PRIVILEGE SE_CREATE_SYMBOLIC_LINK_PRIVILEGE
74 #endif /* ! SE_CREATE_TOKEN_PRIVILEGE */
76 /* Added for debugging purposes. */
79 BYTE SubAuthorityCount;
80 SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
81 DWORD SubAuthority[8];
84 /* Macro to define variable length SID structures */
85 #define MKSID(name, comment, authority, count, rid...) \
86 static NO_COPY struct { \
88 BYTE SubAuthorityCount; \
89 SID_IDENTIFIER_AUTHORITY IdentifierAuthority; \
90 DWORD SubAuthority[count]; \
91 } name##_struct = { SID_REVISION, count, {authority}, {rid}}; \
92 cygpsid NO_COPY name = (PSID) &name##_struct;
94 #define FILE_READ_BITS (FILE_READ_DATA | GENERIC_READ | GENERIC_ALL)
95 #define FILE_WRITE_BITS (FILE_WRITE_DATA | GENERIC_WRITE | GENERIC_ALL)
96 #define FILE_EXEC_BITS (FILE_EXECUTE | GENERIC_EXECUTE | GENERIC_ALL)
103 cygpsid (PSID nsid) { psid = nsid; }
104 operator PSID () const { return psid; }
105 const PSID operator= (PSID nsid) { return psid = nsid;}
106 __uid32_t get_id (BOOL search_grp, int *type = NULL);
107 int get_uid () { return get_id (FALSE); }
108 int get_gid () { return get_id (TRUE); }
110 PWCHAR string (PWCHAR nsidstr) const;
111 char *string (char *nsidstr) const;
113 bool operator== (const PSID nsid) const
117 return EqualSid (psid, nsid);
119 bool operator!= (const PSID nsid) const
120 { return !(*this == nsid); }
121 bool operator== (const char *nsidstr) const;
122 bool operator!= (const char *nsidstr) const
123 { return !(*this == nsidstr); }
125 void debug_print (const char *prefix = NULL) const
127 char buf[256] __attribute__ ((unused));
128 debug_printf ("%s %s", prefix ?: "", string (buf) ?: "NULL");
132 class cygsid : public cygpsid {
133 char sbuf[MAX_SID_LEN];
136 const PSID getfromstr (const char *nsidstr, bool well_known);
137 PSID get_sid (DWORD s, DWORD cnt, DWORD *r, bool well_known);
139 inline const PSID assign (const PSID nsid, bool well_known)
146 CopySid (MAX_SID_LEN, psid, nsid);
147 well_known_sid = well_known;
153 inline operator const PSID () { return psid; }
154 inline bool is_well_known_sid () { return well_known_sid; }
156 /* Both, = and *= are assignment operators. = creates a "normal" SID,
157 *= marks the SID as being a well-known SID. This difference is
158 important when creating a SID list for LSA authentication. */
159 inline const PSID operator= (cygsid &nsid)
160 { return assign (nsid, nsid.well_known_sid); }
161 inline const PSID operator= (const PSID nsid)
162 { return assign (nsid, false); }
163 inline const PSID operator= (const char *nsidstr)
164 { return getfromstr (nsidstr, false); }
165 inline const PSID operator*= (cygsid &nsid)
166 { return assign (nsid, true); }
167 inline const PSID operator*= (const PSID nsid)
168 { return assign (nsid, true); }
169 inline const PSID operator*= (const char *nsidstr)
170 { return getfromstr (nsidstr, true); }
172 inline cygsid () : cygpsid ((PSID) sbuf), well_known_sid (false) {}
173 inline cygsid (const PSID nsid) { *this = nsid; }
174 inline cygsid (const char *nstrsid) { *this = nstrsid; }
176 inline PSID set () { return psid = (PSID) sbuf; }
178 BOOL getfrompw (const struct passwd *pw);
179 BOOL getfromgr (const struct __group32 *gr);
181 void debug_print (const char *prefix = NULL) const
183 char buf[256] __attribute__ ((unused));
184 debug_printf ("%s %s%s", prefix ?: "", string (buf) ?: "NULL", well_known_sid ? " (*)" : " (+)");
188 typedef enum { cygsidlist_empty, cygsidlist_alloc, cygsidlist_auto } cygsidlist_type;
193 BOOL add (const PSID nsi, bool well_known); /* Only with auto for now */
197 cygsidlist_type type;
199 cygsidlist (cygsidlist_type t, int m)
200 : maxcnt (m), cnt (0), type (t)
202 if (t == cygsidlist_alloc)
203 sids = alloc_sids (m);
205 sids = new cygsid [m];
207 ~cygsidlist () { if (type == cygsidlist_auto) delete [] sids; }
209 BOOL addfromgr (struct __group32 *gr) /* Only with alloc */
210 { return sids[cnt].getfromgr (gr) && ++cnt; }
212 /* += adds a "normal" SID, *= adds a well-known SID. See comment in class
214 BOOL operator+= (cygsid &si) { return add ((PSID) si, false); }
215 BOOL operator+= (const char *sidstr) { cygsid nsi (sidstr);
216 return add ((PSID) nsi, false); }
217 BOOL operator+= (const PSID psid) { return add (psid, false); }
218 BOOL operator*= (cygsid &si) { return add ((PSID) si, true); }
219 BOOL operator*= (const char *sidstr) { cygsid nsi (sidstr);
220 return add ((PSID) nsi, true); }
221 BOOL operator*= (const PSID psid) { return add (psid, true); }
223 void count (int ncnt)
225 int count () const { return cnt; }
226 int non_well_known_count () const
229 for (int i = 0; i < cnt; ++i)
230 if (!sids[i].is_well_known_sid ())
235 int position (const PSID sid) const
237 for (int i = 0; i < cnt; ++i)
243 int next_non_well_known_sid (int idx)
246 if (!sids[idx].is_well_known_sid ())
250 BOOL contains (const PSID sid) const { return position (sid) >= 0; }
251 cygsid *alloc_sids (int n);
253 void debug_print (const char *prefix = NULL) const
255 debug_printf ("-- begin sidlist ---");
257 debug_printf ("No elements");
258 for (int i = 0; i < cnt; ++i)
259 sids[i].debug_print (prefix);
260 debug_printf ("-- ende sidlist ---");
264 /* Wrapper class to allow simple deleting of buffer space allocated
266 class security_descriptor {
268 PSECURITY_DESCRIPTOR psd;
271 security_descriptor () : psd (NULL), sd_size (0) {}
272 ~security_descriptor () { free (); }
274 PSECURITY_DESCRIPTOR malloc (size_t nsize);
275 PSECURITY_DESCRIPTOR realloc (size_t nsize);
278 inline DWORD size () const { return sd_size; }
279 inline DWORD copy (void *buf, DWORD buf_size) const {
280 if (buf_size < size ())
282 memcpy (buf, psd, sd_size);
285 inline operator const PSECURITY_DESCRIPTOR () { return psd; }
286 inline operator PSECURITY_DESCRIPTOR *() { return &psd; }
287 inline void operator =(PSECURITY_DESCRIPTOR nsd) { psd = nsd; }
296 BOOL issetgroups () const { return (sgsids.type == cygsidlist_alloc); }
297 void update_supp (const cygsidlist &newsids)
311 void update_pgrp (const PSID sid)
318 extern cygpsid well_known_null_sid;
319 extern cygpsid well_known_world_sid;
320 extern cygpsid well_known_local_sid;
321 extern cygpsid well_known_creator_owner_sid;
322 extern cygpsid well_known_creator_group_sid;
323 extern cygpsid well_known_dialup_sid;
324 extern cygpsid well_known_network_sid;
325 extern cygpsid well_known_batch_sid;
326 extern cygpsid well_known_interactive_sid;
327 extern cygpsid well_known_service_sid;
328 extern cygpsid well_known_authenticated_users_sid;
329 extern cygpsid well_known_this_org_sid;
330 extern cygpsid well_known_system_sid;
331 extern cygpsid well_known_builtin_sid;
332 extern cygpsid well_known_admins_sid;
333 extern cygpsid well_known_users_sid;
334 extern cygpsid fake_logon_sid;
335 extern cygpsid mandatory_medium_integrity_sid;
336 extern cygpsid mandatory_high_integrity_sid;
337 extern cygpsid mandatory_system_integrity_sid;
338 extern cygpsid well_known_samba_unix_user_fake_sid;
340 bool privilege_luid (const PWCHAR pname, LUID *luid);
343 well_known_sid_type (SID_NAME_USE type)
345 return type == SidTypeAlias || type == SidTypeWellKnownGroup;
349 legal_sid_type (SID_NAME_USE type)
351 return type == SidTypeUser || type == SidTypeGroup
352 || type == SidTypeAlias || type == SidTypeWellKnownGroup;
356 /* File manipulation */
357 int __stdcall get_file_attribute (HANDLE, path_conv &, mode_t *,
358 __uid32_t *, __gid32_t *)
359 __attribute__ ((regparm (3)));
360 int __stdcall set_file_attribute (HANDLE, path_conv &,
361 __uid32_t, __gid32_t, mode_t)
362 __attribute__ ((regparm (3)));
363 int __stdcall get_object_sd (HANDLE, security_descriptor &)
364 __attribute__ ((regparm (2)));
365 int __stdcall get_object_attribute (HANDLE, __uid32_t *, __gid32_t *, mode_t *)
366 __attribute__ ((regparm (3)));
367 int __stdcall set_object_attribute (HANDLE, __uid32_t, __gid32_t, mode_t)
368 __attribute__ ((regparm (3)));
369 int __stdcall create_object_sd_from_attribute (HANDLE, __uid32_t, __gid32_t,
370 mode_t, security_descriptor &)
371 __attribute__ ((regparm (3)));
372 int __stdcall set_object_sd (HANDLE, security_descriptor &, bool)
373 __attribute__ ((regparm (3)));
375 int __stdcall get_reg_attribute (HKEY hkey, mode_t *, __uid32_t *, __gid32_t *)
376 __attribute__ ((regparm (3)));
377 LONG __stdcall get_file_sd (HANDLE fh, path_conv &, security_descriptor &, bool)
378 __attribute__ ((regparm (3)));
379 LONG __stdcall set_file_sd (HANDLE fh, path_conv &, security_descriptor &, bool)
380 __attribute__ ((regparm (3)));
381 bool __stdcall add_access_allowed_ace (PACL, int, DWORD, PSID, size_t &, DWORD)
382 __attribute__ ((regparm (3)));
383 bool __stdcall add_access_denied_ace (PACL, int, DWORD, PSID, size_t &, DWORD)
384 __attribute__ ((regparm (3)));
385 int __stdcall check_file_access (path_conv &, int, bool)
386 __attribute__ ((regparm (3)));
387 int __stdcall check_registry_access (HANDLE, int, bool)
388 __attribute__ ((regparm (3)));
390 void set_security_attribute (path_conv &pc, int attribute,
391 PSECURITY_ATTRIBUTES psa,
392 security_descriptor &sd_buf);
394 bool get_sids_info (cygpsid, cygpsid, __uid32_t * , __gid32_t *);
398 extern "C" int aclsort32 (int, int, __acl32 *);
399 extern "C" int acl32 (const char *, int, int, __acl32 *);
400 int getacl (HANDLE, path_conv &, int, __acl32 *);
401 int setacl (HANDLE, path_conv &, int, __acl32 *, bool &);
403 /* Set impersonation or restricted token. */
404 void set_imp_token (HANDLE token, int type);
405 /* Function creating a token by calling NtCreateToken. */
406 HANDLE create_token (cygsid &usersid, user_groups &groups, struct passwd * pw);
407 /* LSA authentication function. */
408 HANDLE lsaauth (cygsid &, user_groups &, struct passwd *);
409 /* LSA private key storage authentication, same as when using service logons. */
410 HANDLE lsaprivkeyauth (struct passwd *pw);
411 /* Verify an existing token */
412 bool verify_token (HANDLE token, cygsid &usersid, user_groups &groups, bool *pintern = NULL);
413 /* Get groups of a user */
414 bool get_server_groups (cygsidlist &grp_list, PSID usersid, struct passwd *pw);
416 /* Extract U-domain\user field from passwd entry. */
417 void extract_nt_dom_user (const struct passwd *pw, PWCHAR domain, PWCHAR user);
418 /* Get default logonserver for a domain. */
419 bool get_logon_server (PWCHAR domain, PWCHAR wserver, bool rediscovery);
421 HANDLE open_local_policy (ACCESS_MASK access);
423 /* sec_helper.cc: Security helper functions. */
424 int set_privilege (HANDLE token, DWORD privilege, bool enable);
425 void set_cygwin_privileges (HANDLE token);
427 #define _push_thread_privilege(_priv, _val, _check) { \
428 HANDLE _dup_token = NULL; \
429 HANDLE _token = (cygheap->user.issetuid () && (_check)) \
430 ? cygheap->user.primary_token () : hProcToken; \
431 if (!DuplicateTokenEx (_token, MAXIMUM_ALLOWED, NULL, \
432 SecurityImpersonation, TokenImpersonation, \
434 debug_printf ("DuplicateTokenEx: %E"); \
435 else if (!ImpersonateLoggedOnUser (_dup_token)) \
436 debug_printf ("ImpersonateLoggedOnUser: %E"); \
438 set_privilege (_dup_token, (_priv), (_val));
440 #define push_thread_privilege(_priv, _val) _push_thread_privilege(_priv,_val,1)
441 #define push_self_privilege(_priv, _val) _push_thread_privilege(_priv,_val,0)
443 #define pop_thread_privilege() \
446 if (!cygheap->user.issetuid ()) \
449 cygheap->user.reimpersonate (); \
450 CloseHandle (_dup_token); \
454 #define pop_self_privilege() pop_thread_privilege()
458 /* Various types of security attributes for use in Create* functions. */
459 extern SECURITY_ATTRIBUTES sec_none, sec_none_nih, sec_all, sec_all_nih;
460 extern SECURITY_ATTRIBUTES *__stdcall __sec_user (PVOID, PSID, PSID,
462 __attribute__ ((regparm (3)));
463 extern PSECURITY_DESCRIPTOR _everyone_sd (void *buf, ACCESS_MASK access);
464 #define everyone_sd(access) (_everyone_sd (alloca (SD_MIN_SIZE), (access)))
466 #define sec_none_cloexec(f) (((f) & O_CLOEXEC ? &sec_none_nih : &sec_none))
468 extern bool sec_acl (PACL acl, bool original, bool admins, PSID sid1 = NO_SID,
469 PSID sid2 = NO_SID, DWORD access2 = 0);
471 ssize_t __stdcall read_ea (HANDLE, path_conv &, const char *,
473 __attribute__ ((regparm (3)));
474 int __stdcall write_ea (HANDLE, path_conv &, const char *, const char *,
476 __attribute__ ((regparm (3)));
478 /* Note: sid1 is usually (read: currently always) the current user's
479 effective sid (cygheap->user.sid ()). */
480 extern inline SECURITY_ATTRIBUTES *
481 sec_user_nih (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
484 return __sec_user (sa_buf, sid1, sid2, access2, FALSE);
487 extern inline SECURITY_ATTRIBUTES *
488 sec_user (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
491 return __sec_user (sa_buf, sid1, sid2, access2, TRUE);
494 #endif /*_SECURITY_H*/