1 /* security.h: security declarations
3 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
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_DEFAULT_SIZE 3072
30 #define NO_SID ((PSID)NULL)
32 #ifndef SE_CREATE_TOKEN_PRIVILEGE
33 #define SE_CREATE_TOKEN_PRIVILEGE 2UL
34 #define SE_ASSIGNPRIMARYTOKEN_PRIVILEGE 3UL
35 #define SE_LOCK_MEMORY_PRIVILEGE 4UL
36 #define SE_INCREASE_QUOTA_PRIVILEGE 5UL
37 #define SE_MACHINE_ACCOUNT_PRIVILEGE 6UL
38 #define SE_TCB_PRIVILEGE 7UL
39 #define SE_SECURITY_PRIVILEGE 8UL
40 #define SE_TAKE_OWNERSHIP_PRIVILEGE 9UL
41 #define SE_LOAD_DRIVER_PRIVILEGE 10UL
42 #define SE_SYSTEM_PROFILE_PRIVILEGE 11UL
43 #define SE_SYSTEMTIME_PRIVILEGE 12UL
44 #define SE_PROF_SINGLE_PROCESS_PRIVILEGE 13UL
45 #define SE_INC_BASE_PRIORITY_PRIVILEGE 14UL
46 #define SE_CREATE_PAGEFILE_PRIVILEGE 15UL
47 #define SE_CREATE_PERMANENT_PRIVILEGE 16UL
48 #define SE_BACKUP_PRIVILEGE 17UL
49 #define SE_RESTORE_PRIVILEGE 18UL
50 #define SE_SHUTDOWN_PRIVILEGE 19UL
51 #define SE_DEBUG_PRIVILEGE 20UL
52 #define SE_AUDIT_PRIVILEGE 21UL
53 #define SE_SYSTEM_ENVIRONMENT_PRIVILEGE 22UL
54 #define SE_CHANGE_NOTIFY_PRIVILEGE 23UL
55 #define SE_REMOTE_SHUTDOWN_PRIVILEGE 24UL
56 /* Starting with Windows 2000 */
57 #define SE_UNDOCK_PRIVILEGE 25UL
58 #define SE_SYNC_AGENT_PRIVILEGE 26UL
59 #define SE_ENABLE_DELEGATION_PRIVILEGE 27UL
60 #define SE_MANAGE_VOLUME_PRIVILEGE 28UL
61 /* Starting with Windows 2000 SP4, XP SP2, 2003 Server */
62 #define SE_IMPERSONATE_PRIVILEGE 29UL
63 #define SE_CREATE_GLOBAL_PRIVILEGE 30UL
64 /* Starting with Vista */
65 #define SE_TRUSTED_CREDMAN_ACCESS_PRIVILEGE 31UL
66 #define SE_RELABEL_PRIVILEGE 32UL
67 #define SE_INCREASE_WORKING_SET_PRIVILEGE 33UL
68 #define SE_TIME_ZONE_PRIVILEGE 34UL
69 #define SE_CREATE_SYMBOLIC_LINK_PRIVILEGE 35UL
71 #define SE_MAX_WELL_KNOWN_PRIVILEGE SE_CREATE_SYMBOLIC_LINK_PRIVILEGE
73 #endif /* ! SE_CREATE_TOKEN_PRIVILEGE */
75 /* Added for debugging purposes. */
78 BYTE SubAuthorityCount;
79 SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
80 DWORD SubAuthority[8];
83 /* Macro to define variable length SID structures */
84 #define MKSID(name, comment, authority, count, rid...) \
85 static NO_COPY struct { \
87 BYTE SubAuthorityCount; \
88 SID_IDENTIFIER_AUTHORITY IdentifierAuthority; \
89 DWORD SubAuthority[count]; \
90 } name##_struct = { SID_REVISION, count, {authority}, {rid}}; \
91 cygpsid NO_COPY name = (PSID) &name##_struct;
93 #define FILE_READ_BITS (FILE_READ_DATA | GENERIC_READ | GENERIC_ALL)
94 #define FILE_WRITE_BITS (FILE_WRITE_DATA | GENERIC_WRITE | GENERIC_ALL)
95 #define FILE_EXEC_BITS (FILE_EXECUTE | GENERIC_EXECUTE | GENERIC_ALL)
102 cygpsid (PSID nsid) { psid = nsid; }
103 operator PSID () const { return psid; }
104 const PSID operator= (PSID nsid) { return psid = nsid;}
105 __uid32_t get_id (BOOL search_grp, int *type = NULL);
106 int get_uid () { return get_id (FALSE); }
107 int get_gid () { return get_id (TRUE); }
109 PWCHAR string (PWCHAR nsidstr) const;
110 char *string (char *nsidstr) const;
112 bool operator== (const PSID nsid) const
116 return EqualSid (psid, nsid);
118 bool operator!= (const PSID nsid) const
119 { return !(*this == nsid); }
120 bool operator== (const char *nsidstr) const;
121 bool operator!= (const char *nsidstr) const
122 { return !(*this == nsidstr); }
124 void debug_print (const char *prefix = NULL) const
126 char buf[256] __attribute__ ((unused));
127 debug_printf ("%s %s", prefix ?: "", string (buf) ?: "NULL");
131 class cygsid : public cygpsid {
132 char sbuf[MAX_SID_LEN];
135 const PSID getfromstr (const char *nsidstr, bool well_known);
136 PSID get_sid (DWORD s, DWORD cnt, DWORD *r, bool well_known);
138 inline const PSID assign (const PSID nsid, bool well_known)
145 CopySid (MAX_SID_LEN, psid, nsid);
146 well_known_sid = well_known;
152 inline operator const PSID () { return psid; }
153 inline bool is_well_known_sid () { return well_known_sid; }
155 /* Both, = and *= are assignment operators. = creates a "normal" SID,
156 *= marks the SID as being a well-known SID. This difference is
157 important when creating a SID list for LSA authentication. */
158 inline const PSID operator= (cygsid &nsid)
159 { return assign (nsid, nsid.well_known_sid); }
160 inline const PSID operator= (const PSID nsid)
161 { return assign (nsid, false); }
162 inline const PSID operator= (const char *nsidstr)
163 { return getfromstr (nsidstr, false); }
164 inline const PSID operator*= (cygsid &nsid)
165 { return assign (nsid, true); }
166 inline const PSID operator*= (const PSID nsid)
167 { return assign (nsid, true); }
168 inline const PSID operator*= (const char *nsidstr)
169 { return getfromstr (nsidstr, true); }
171 inline cygsid () : cygpsid ((PSID) sbuf), well_known_sid (false) {}
172 inline cygsid (const PSID nsid) { *this = nsid; }
173 inline cygsid (const char *nstrsid) { *this = nstrsid; }
175 inline PSID set () { return psid = (PSID) sbuf; }
177 BOOL getfrompw (const struct passwd *pw);
178 BOOL getfromgr (const struct __group32 *gr);
180 void debug_print (const char *prefix = NULL) const
182 char buf[256] __attribute__ ((unused));
183 debug_printf ("%s %s%s", prefix ?: "", string (buf) ?: "NULL", well_known_sid ? " (*)" : " (+)");
187 typedef enum { cygsidlist_empty, cygsidlist_alloc, cygsidlist_auto } cygsidlist_type;
192 BOOL add (const PSID nsi, bool well_known); /* Only with auto for now */
196 cygsidlist_type type;
198 cygsidlist (cygsidlist_type t, int m)
199 : maxcnt (m), cnt (0), type (t)
201 if (t == cygsidlist_alloc)
202 sids = alloc_sids (m);
204 sids = new cygsid [m];
206 ~cygsidlist () { if (type == cygsidlist_auto) delete [] sids; }
208 BOOL addfromgr (struct __group32 *gr) /* Only with alloc */
209 { return sids[cnt].getfromgr (gr) && ++cnt; }
211 /* += adds a "normal" SID, *= adds a well-known SID. See comment in class
213 BOOL operator+= (cygsid &si) { return add ((PSID) si, false); }
214 BOOL operator+= (const char *sidstr) { cygsid nsi (sidstr);
215 return add ((PSID) nsi, false); }
216 BOOL operator+= (const PSID psid) { return add (psid, false); }
217 BOOL operator*= (cygsid &si) { return add ((PSID) si, true); }
218 BOOL operator*= (const char *sidstr) { cygsid nsi (sidstr);
219 return add ((PSID) nsi, true); }
220 BOOL operator*= (const PSID psid) { return add (psid, true); }
222 void count (int ncnt)
224 int count () const { return cnt; }
225 int non_well_known_count () const
228 for (int i = 0; i < cnt; ++i)
229 if (!sids[i].is_well_known_sid ())
234 int position (const PSID sid) const
236 for (int i = 0; i < cnt; ++i)
242 int next_non_well_known_sid (int idx)
245 if (!sids[idx].is_well_known_sid ())
249 BOOL contains (const PSID sid) const { return position (sid) >= 0; }
250 cygsid *alloc_sids (int n);
252 void debug_print (const char *prefix = NULL) const
254 debug_printf ("-- begin sidlist ---");
256 debug_printf ("No elements");
257 for (int i = 0; i < cnt; ++i)
258 sids[i].debug_print (prefix);
259 debug_printf ("-- ende sidlist ---");
263 /* Wrapper class to allow simple deleting of buffer space allocated
265 class security_descriptor {
267 PSECURITY_DESCRIPTOR psd;
270 security_descriptor () : psd (NULL), sd_size (0) {}
271 ~security_descriptor () { free (); }
273 PSECURITY_DESCRIPTOR malloc (size_t nsize);
274 PSECURITY_DESCRIPTOR realloc (size_t nsize);
277 inline DWORD size () const { return sd_size; }
278 inline DWORD copy (void *buf, DWORD buf_size) const {
279 if (buf_size < size ())
281 memcpy (buf, psd, sd_size);
284 inline operator const PSECURITY_DESCRIPTOR () { return psd; }
285 inline operator PSECURITY_DESCRIPTOR *() { return &psd; }
286 inline void operator =(PSECURITY_DESCRIPTOR nsd) { psd = nsd; }
295 BOOL issetgroups () const { return (sgsids.type == cygsidlist_alloc); }
296 void update_supp (const cygsidlist &newsids)
310 void update_pgrp (const PSID sid)
317 extern cygpsid well_known_null_sid;
318 extern cygpsid well_known_world_sid;
319 extern cygpsid well_known_local_sid;
320 extern cygpsid well_known_creator_owner_sid;
321 extern cygpsid well_known_creator_group_sid;
322 extern cygpsid well_known_dialup_sid;
323 extern cygpsid well_known_network_sid;
324 extern cygpsid well_known_batch_sid;
325 extern cygpsid well_known_interactive_sid;
326 extern cygpsid well_known_service_sid;
327 extern cygpsid well_known_authenticated_users_sid;
328 extern cygpsid well_known_this_org_sid;
329 extern cygpsid well_known_system_sid;
330 extern cygpsid well_known_admins_sid;
331 extern cygpsid well_known_users_sid;
332 extern cygpsid fake_logon_sid;
333 extern cygpsid mandatory_medium_integrity_sid;
334 extern cygpsid mandatory_high_integrity_sid;
335 extern cygpsid mandatory_system_integrity_sid;
336 extern cygpsid well_known_samba_unix_user_fake_sid;
338 bool privilege_luid (const PWCHAR pname, LUID *luid);
341 legal_sid_type (SID_NAME_USE type)
343 return type == SidTypeUser || type == SidTypeGroup
344 || type == SidTypeAlias || type == SidTypeWellKnownGroup;
348 /* File manipulation */
349 int __stdcall get_file_attribute (HANDLE, path_conv &, mode_t *,
350 __uid32_t *, __gid32_t *);
351 int __stdcall set_file_attribute (HANDLE, path_conv &,
352 __uid32_t, __gid32_t, int);
353 int __stdcall get_reg_attribute (HKEY hkey, mode_t *, __uid32_t *, __gid32_t *);
354 LONG __stdcall get_file_sd (HANDLE fh, path_conv &, security_descriptor &sd);
355 LONG __stdcall set_file_sd (HANDLE fh, path_conv &, security_descriptor &sd,
357 bool __stdcall add_access_allowed_ace (PACL acl, int offset, DWORD attributes, PSID sid, size_t &len_add, DWORD inherit);
358 bool __stdcall add_access_denied_ace (PACL acl, int offset, DWORD attributes, PSID sid, size_t &len_add, DWORD inherit);
359 int __stdcall check_file_access (path_conv &, int, bool);
360 int __stdcall check_registry_access (HANDLE, int, bool);
362 void set_security_attribute (path_conv &pc, int attribute,
363 PSECURITY_ATTRIBUTES psa,
364 security_descriptor &sd_buf);
366 bool get_sids_info (cygpsid, cygpsid, __uid32_t * , __gid32_t *);
370 extern "C" int aclsort32 (int, int, __acl32 *);
371 extern "C" int acl32 (const char *, int, int, __acl32 *);
372 int getacl (HANDLE, path_conv &, int, __acl32 *);
373 int setacl (HANDLE, path_conv &, int, __acl32 *, bool &);
375 /* Set impersonation or restricted token. */
376 void set_imp_token (HANDLE token, int type);
377 /* Function creating a token by calling NtCreateToken. */
378 HANDLE create_token (cygsid &usersid, user_groups &groups, struct passwd * pw);
379 /* LSA authentication function. */
380 HANDLE lsaauth (cygsid &, user_groups &, struct passwd *);
381 /* LSA private key storage authentication, same as when using service logons. */
382 HANDLE lsaprivkeyauth (struct passwd *pw);
383 /* Verify an existing token */
384 bool verify_token (HANDLE token, cygsid &usersid, user_groups &groups, bool *pintern = NULL);
385 /* Get groups of a user */
386 bool get_server_groups (cygsidlist &grp_list, PSID usersid, struct passwd *pw);
388 /* Extract U-domain\user field from passwd entry. */
389 void extract_nt_dom_user (const struct passwd *pw, PWCHAR domain, PWCHAR user);
390 /* Get default logonserver for a domain. */
391 bool get_logon_server (PWCHAR domain, PWCHAR wserver, bool rediscovery);
393 HANDLE open_local_policy (ACCESS_MASK access);
395 /* sec_helper.cc: Security helper functions. */
396 int set_privilege (HANDLE token, DWORD privilege, bool enable);
397 void set_cygwin_privileges (HANDLE token);
399 #define _push_thread_privilege(_priv, _val, _check) { \
400 HANDLE _dup_token = NULL; \
401 HANDLE _token = (cygheap->user.issetuid () && (_check)) \
402 ? cygheap->user.primary_token () : hProcToken; \
403 if (!DuplicateTokenEx (_token, MAXIMUM_ALLOWED, NULL, \
404 SecurityImpersonation, TokenImpersonation, \
406 debug_printf ("DuplicateTokenEx: %E"); \
407 else if (!ImpersonateLoggedOnUser (_dup_token)) \
408 debug_printf ("ImpersonateLoggedOnUser: %E"); \
410 set_privilege (_dup_token, (_priv), (_val));
412 #define push_thread_privilege(_priv, _val) _push_thread_privilege(_priv,_val,1)
413 #define push_self_privilege(_priv, _val) _push_thread_privilege(_priv,_val,0)
415 #define pop_thread_privilege() \
418 if (!cygheap->user.issetuid ()) \
421 cygheap->user.reimpersonate (); \
422 CloseHandle (_dup_token); \
426 #define pop_self_privilege() pop_thread_privilege()
429 /* Retrieve a security descriptor that allows all access */
430 SECURITY_DESCRIPTOR *__stdcall get_null_sd ();
432 /* Various types of security attributes for use in Create* functions. */
433 extern SECURITY_ATTRIBUTES sec_none, sec_none_nih, sec_all, sec_all_nih;
434 extern SECURITY_ATTRIBUTES *__stdcall __sec_user (PVOID sa_buf, PSID sid1, PSID sid2,
435 DWORD access2, BOOL inherit)
436 __attribute__ ((regparm (3)));
437 extern PSECURITY_DESCRIPTOR _everyone_sd (void *buf, ACCESS_MASK access);
438 #define everyone_sd(access) (_everyone_sd (alloca (SD_MIN_SIZE), (access)))
440 extern bool sec_acl (PACL acl, bool original, bool admins, PSID sid1 = NO_SID,
441 PSID sid2 = NO_SID, DWORD access2 = 0);
443 ssize_t __stdcall read_ea (HANDLE hdl, path_conv &pc, const char *name,
444 char *value, size_t size);
445 int __stdcall write_ea (HANDLE hdl, path_conv &pc, const char *name,
446 const char *value, size_t size, int flags);
448 /* Note: sid1 is usually (read: currently always) the current user's
449 effective sid (cygheap->user.sid ()). */
450 extern inline SECURITY_ATTRIBUTES *
451 sec_user_nih (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
454 return __sec_user (sa_buf, sid1, sid2, access2, FALSE);
457 extern inline SECURITY_ATTRIBUTES *
458 sec_user (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
461 return __sec_user (sa_buf, sid1, sid2, access2, TRUE);
463 #endif /*_SECURITY_H*/