/* security.h: security declarations
- Copyright 2000, 2001, 2002 Red Hat, Inc.
+ Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010, 2011 Red Hat, Inc.
This file is part of Cygwin.
#include <accctrl.h>
+/* Special file attribute set, for instance, in open() and mkdir() to
+ flag that a file has just been created. Used in alloc_sd, see there. */
+#define S_JUSTCREATED 0x80000000
+
#define DEFAULT_UID DOMAIN_USER_RID_ADMIN
#define UNKNOWN_UID 400 /* Non conflicting number */
#define UNKNOWN_GID 401
#define MAX_SID_LEN 40
#define MAX_DACL_LEN(n) (sizeof (ACL) \
+ (n) * (sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD) + MAX_SID_LEN))
-#define ACL_DEFAULT_SIZE 3072
+#define SD_MIN_SIZE (sizeof (SECURITY_DESCRIPTOR) + MAX_DACL_LEN (1))
+#define ACL_MAXIMUM_SIZE 65532 /* Yeah, right. 64K - sizeof (DWORD). */
+#define SD_MAXIMUM_SIZE 65536
#define NO_SID ((PSID)NULL)
+#ifndef SE_CREATE_TOKEN_PRIVILEGE
+#define SE_CREATE_TOKEN_PRIVILEGE 2UL
+#define SE_ASSIGNPRIMARYTOKEN_PRIVILEGE 3UL
+#define SE_LOCK_MEMORY_PRIVILEGE 4UL
+#define SE_INCREASE_QUOTA_PRIVILEGE 5UL
+#define SE_MACHINE_ACCOUNT_PRIVILEGE 6UL
+#define SE_TCB_PRIVILEGE 7UL
+#define SE_SECURITY_PRIVILEGE 8UL
+#define SE_TAKE_OWNERSHIP_PRIVILEGE 9UL
+#define SE_LOAD_DRIVER_PRIVILEGE 10UL
+#define SE_SYSTEM_PROFILE_PRIVILEGE 11UL
+#define SE_SYSTEMTIME_PRIVILEGE 12UL
+#define SE_PROF_SINGLE_PROCESS_PRIVILEGE 13UL
+#define SE_INC_BASE_PRIORITY_PRIVILEGE 14UL
+#define SE_CREATE_PAGEFILE_PRIVILEGE 15UL
+#define SE_CREATE_PERMANENT_PRIVILEGE 16UL
+#define SE_BACKUP_PRIVILEGE 17UL
+#define SE_RESTORE_PRIVILEGE 18UL
+#define SE_SHUTDOWN_PRIVILEGE 19UL
+#define SE_DEBUG_PRIVILEGE 20UL
+#define SE_AUDIT_PRIVILEGE 21UL
+#define SE_SYSTEM_ENVIRONMENT_PRIVILEGE 22UL
+#define SE_CHANGE_NOTIFY_PRIVILEGE 23UL
+#define SE_REMOTE_SHUTDOWN_PRIVILEGE 24UL
+/* Starting with Windows 2000 */
+#define SE_UNDOCK_PRIVILEGE 25UL
+#define SE_SYNC_AGENT_PRIVILEGE 26UL
+#define SE_ENABLE_DELEGATION_PRIVILEGE 27UL
+#define SE_MANAGE_VOLUME_PRIVILEGE 28UL
+/* Starting with Windows 2000 SP4, XP SP2, 2003 Server */
+#define SE_IMPERSONATE_PRIVILEGE 29UL
+#define SE_CREATE_GLOBAL_PRIVILEGE 30UL
+/* Starting with Vista */
+#define SE_TRUSTED_CREDMAN_ACCESS_PRIVILEGE 31UL
+#define SE_RELABEL_PRIVILEGE 32UL
+#define SE_INCREASE_WORKING_SET_PRIVILEGE 33UL
+#define SE_TIME_ZONE_PRIVILEGE 34UL
+#define SE_CREATE_SYMBOLIC_LINK_PRIVILEGE 35UL
+
+#define SE_MAX_WELL_KNOWN_PRIVILEGE SE_CREATE_SYMBOLIC_LINK_PRIVILEGE
+
+#endif /* ! SE_CREATE_TOKEN_PRIVILEGE */
+
+/* Added for debugging purposes. */
+typedef struct {
+ BYTE Revision;
+ BYTE SubAuthorityCount;
+ SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
+ DWORD SubAuthority[8];
+} DBGSID, *PDBGSID;
+
+/* Macro to define variable length SID structures */
+#define MKSID(name, comment, authority, count, rid...) \
+static NO_COPY struct { \
+ BYTE Revision; \
+ BYTE SubAuthorityCount; \
+ SID_IDENTIFIER_AUTHORITY IdentifierAuthority; \
+ DWORD SubAuthority[count]; \
+} name##_struct = { SID_REVISION, count, {authority}, {rid}}; \
+cygpsid NO_COPY name = (PSID) &name##_struct;
+
#define FILE_READ_BITS (FILE_READ_DATA | GENERIC_READ | GENERIC_ALL)
#define FILE_WRITE_BITS (FILE_WRITE_DATA | GENERIC_WRITE | GENERIC_ALL)
#define FILE_EXEC_BITS (FILE_EXECUTE | GENERIC_EXECUTE | GENERIC_ALL)
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+ /* We need these declarations, otherwise g++ complains that the below
+ inline methods use an undefined function, if ntdll.h isn't included. */
+ BOOLEAN NTAPI RtlEqualSid (PSID, PSID);
+ NTSTATUS NTAPI RtlCopySid (ULONG, PSID, PSID);
+#ifdef __cplusplus
+}
+#endif
+
class cygpsid {
protected:
PSID psid;
public:
cygpsid () {}
cygpsid (PSID nsid) { psid = nsid; }
- operator const PSID () { return psid; }
+ operator PSID () const { return psid; }
const PSID operator= (PSID nsid) { return psid = nsid;}
__uid32_t get_id (BOOL search_grp, int *type = NULL);
int get_uid () { return get_id (FALSE); }
int get_gid () { return get_id (TRUE); }
+ PWCHAR string (PWCHAR nsidstr) const;
char *string (char *nsidstr) const;
bool operator== (const PSID nsid) const
{
if (!psid || !nsid)
return nsid == psid;
- return EqualSid (psid, nsid);
+ return RtlEqualSid (psid, nsid);
}
bool operator!= (const PSID nsid) const
{ return !(*this == nsid); }
class cygsid : public cygpsid {
char sbuf[MAX_SID_LEN];
+ bool well_known_sid;
- const PSID getfromstr (const char *nsidstr);
- PSID get_sid (DWORD s, DWORD cnt, DWORD *r);
+ const PSID getfromstr (const char *nsidstr, bool well_known);
+ PSID get_sid (DWORD s, DWORD cnt, DWORD *r, bool well_known);
- inline const PSID assign (const PSID nsid)
+ inline const PSID assign (const PSID nsid, bool well_known)
{
if (!nsid)
psid = NO_SID;
else
{
psid = (PSID) sbuf;
- CopySid (MAX_SID_LEN, psid, nsid);
+ RtlCopySid (MAX_SID_LEN, psid, nsid);
+ well_known_sid = well_known;
}
return psid;
}
public:
- static void init();
inline operator const PSID () { return psid; }
+ inline bool is_well_known_sid () { return well_known_sid; }
+ /* Both, = and *= are assignment operators. = creates a "normal" SID,
+ *= marks the SID as being a well-known SID. This difference is
+ important when creating a SID list for LSA authentication. */
inline const PSID operator= (cygsid &nsid)
- { return assign (nsid); }
+ { return assign (nsid, nsid.well_known_sid); }
inline const PSID operator= (const PSID nsid)
- { return assign (nsid); }
+ { return assign (nsid, false); }
inline const PSID operator= (const char *nsidstr)
- { return getfromstr (nsidstr); }
-
- inline cygsid () : cygpsid ((PSID) sbuf) {}
+ { return getfromstr (nsidstr, false); }
+ inline const PSID operator*= (cygsid &nsid)
+ { return assign (nsid, true); }
+ inline const PSID operator*= (const PSID nsid)
+ { return assign (nsid, true); }
+ inline const PSID operator*= (const char *nsidstr)
+ { return getfromstr (nsidstr, true); }
+
+ inline cygsid () : cygpsid ((PSID) sbuf), well_known_sid (false) {}
inline cygsid (const PSID nsid) { *this = nsid; }
inline cygsid (const char *nstrsid) { *this = nstrsid; }
BOOL getfrompw (const struct passwd *pw);
BOOL getfromgr (const struct __group32 *gr);
+
+ void debug_print (const char *prefix = NULL) const
+ {
+ char buf[256] __attribute__ ((unused));
+ debug_printf ("%s %s%s", prefix ?: "", string (buf) ?: "NULL", well_known_sid ? " (*)" : " (+)");
+ }
};
typedef enum { cygsidlist_empty, cygsidlist_alloc, cygsidlist_auto } cygsidlist_type;
class cygsidlist {
- int maxcount;
+ int maxcnt;
+ int cnt;
+
+ BOOL add (const PSID nsi, bool well_known); /* Only with auto for now */
+
public:
- int count;
cygsid *sids;
cygsidlist_type type;
cygsidlist (cygsidlist_type t, int m)
+ : maxcnt (m), cnt (0), type (t)
{
- type = t;
- count = 0;
- maxcount = m;
if (t == cygsidlist_alloc)
sids = alloc_sids (m);
else
}
~cygsidlist () { if (type == cygsidlist_auto) delete [] sids; }
- BOOL add (const PSID nsi) /* Only with auto for now */
+ BOOL addfromgr (struct __group32 *gr) /* Only with alloc */
+ { return sids[cnt].getfromgr (gr) && ++cnt; }
+
+ /* += adds a "normal" SID, *= adds a well-known SID. See comment in class
+ cygsid above. */
+ BOOL operator+= (cygsid &si) { return add ((PSID) si, false); }
+ BOOL operator+= (const char *sidstr) { cygsid nsi (sidstr);
+ return add ((PSID) nsi, false); }
+ BOOL operator+= (const PSID psid) { return add (psid, false); }
+ BOOL operator*= (cygsid &si) { return add ((PSID) si, true); }
+ BOOL operator*= (const char *sidstr) { cygsid nsi (sidstr);
+ return add ((PSID) nsi, true); }
+ BOOL operator*= (const PSID psid) { return add (psid, true); }
+
+ void count (int ncnt)
+ { cnt = ncnt; }
+ int count () const { return cnt; }
+ int non_well_known_count () const
{
- if (count >= maxcount)
- {
- cygsid *tmp = new cygsid [ 2 * maxcount];
- if (!tmp)
- return FALSE;
- maxcount *= 2;
- for (int i = 0; i < count; ++i)
- tmp[i] = sids[i];
- delete [] sids;
- sids = tmp;
- }
- sids[count++] = nsi;
- return TRUE;
+ int wcnt = 0;
+ for (int i = 0; i < cnt; ++i)
+ if (!sids[i].is_well_known_sid ())
+ ++wcnt;
+ return wcnt;
}
- BOOL add (cygsid &nsi) { return add ((PSID) nsi); }
- BOOL add (const char *sidstr)
- { cygsid nsi (sidstr); return add (nsi); }
- BOOL addfromgr (struct __group32 *gr) /* Only with alloc */
- { return sids[count++].getfromgr (gr); }
-
- BOOL operator+= (cygsid &si) { return add (si); }
- BOOL operator+= (const char *sidstr) { return add (sidstr); }
- BOOL operator+= (const PSID psid) { return add (psid); }
int position (const PSID sid) const
{
- for (int i = 0; i < count; ++i)
+ for (int i = 0; i < cnt; ++i)
if (sids[i] == sid)
return i;
return -1;
}
+ int next_non_well_known_sid (int idx)
+ {
+ while (++idx < cnt)
+ if (!sids[idx].is_well_known_sid ())
+ return idx;
+ return -1;
+ }
BOOL contains (const PSID sid) const { return position (sid) >= 0; }
cygsid *alloc_sids (int n);
void free_sids ();
void debug_print (const char *prefix = NULL) const
{
debug_printf ("-- begin sidlist ---");
- if (!count)
+ if (!cnt)
debug_printf ("No elements");
- for (int i = 0; i < count; ++i)
+ for (int i = 0; i < cnt; ++i)
sids[i].debug_print (prefix);
debug_printf ("-- ende sidlist ---");
}
PSECURITY_DESCRIPTOR malloc (size_t nsize);
PSECURITY_DESCRIPTOR realloc (size_t nsize);
- void free (void);
-
- inline DWORD size (void) const { return sd_size; }
+ void free ();
+
+ inline DWORD size () const { return sd_size; }
+ inline DWORD copy (void *buf, DWORD buf_size) const {
+ if (buf_size < size ())
+ return sd_size;
+ memcpy (buf, psd, sd_size);
+ return 0;
+ }
inline operator const PSECURITY_DESCRIPTOR () { return psd; }
+ inline operator PSECURITY_DESCRIPTOR *() { return &psd; }
+ inline void operator =(PSECURITY_DESCRIPTOR nsd) { psd = nsd; }
};
class user_groups {
}
};
-extern cygsid well_known_null_sid;
-extern cygsid well_known_world_sid;
-extern cygsid well_known_local_sid;
-extern cygsid well_known_creator_owner_sid;
-extern cygsid well_known_creator_group_sid;
-extern cygsid well_known_dialup_sid;
-extern cygsid well_known_network_sid;
-extern cygsid well_known_batch_sid;
-extern cygsid well_known_interactive_sid;
-extern cygsid well_known_service_sid;
-extern cygsid well_known_authenticated_users_sid;
-extern cygsid well_known_system_sid;
-extern cygsid well_known_admins_sid;
+extern cygpsid well_known_null_sid;
+extern cygpsid well_known_world_sid;
+extern cygpsid well_known_local_sid;
+extern cygpsid well_known_console_logon_sid;
+extern cygpsid well_known_creator_owner_sid;
+extern cygpsid well_known_creator_group_sid;
+extern cygpsid well_known_dialup_sid;
+extern cygpsid well_known_network_sid;
+extern cygpsid well_known_batch_sid;
+extern cygpsid well_known_interactive_sid;
+extern cygpsid well_known_service_sid;
+extern cygpsid well_known_authenticated_users_sid;
+extern cygpsid well_known_this_org_sid;
+extern cygpsid well_known_system_sid;
+extern cygpsid well_known_builtin_sid;
+extern cygpsid well_known_admins_sid;
+extern cygpsid well_known_users_sid;
+extern cygpsid fake_logon_sid;
+extern cygpsid mandatory_medium_integrity_sid;
+extern cygpsid mandatory_high_integrity_sid;
+extern cygpsid mandatory_system_integrity_sid;
+extern cygpsid well_known_samba_unix_user_fake_sid;
+
+bool privilege_luid (const PWCHAR pname, LUID &luid, bool &high_integrity);
+
+inline BOOL
+well_known_sid_type (SID_NAME_USE type)
+{
+ return type == SidTypeAlias || type == SidTypeWellKnownGroup;
+}
inline BOOL
legal_sid_type (SID_NAME_USE type)
|| type == SidTypeAlias || type == SidTypeWellKnownGroup;
}
-extern bool allow_ntea;
-extern bool allow_ntsec;
-extern bool allow_smbntsec;
-
+class path_conv;
/* File manipulation */
-int __stdcall set_process_privileges ();
-int __stdcall get_file_attribute (int, const char *, mode_t *,
- __uid32_t * = NULL, __gid32_t * = NULL);
-int __stdcall set_file_attribute (int, const char *, int);
-int __stdcall set_file_attribute (int, const char *, __uid32_t, __gid32_t, int);
-int __stdcall get_object_attribute (HANDLE handle, SE_OBJECT_TYPE object_type, mode_t *,
- __uid32_t * = NULL, __gid32_t * = NULL);
-LONG __stdcall read_sd (const char *file, security_descriptor &sd);
-LONG __stdcall write_sd (const char *file, security_descriptor &sd);
-bool __stdcall add_access_allowed_ace (PACL acl, int offset, DWORD attributes, PSID sid, size_t &len_add, DWORD inherit);
-bool __stdcall add_access_denied_ace (PACL acl, int offset, DWORD attributes, PSID sid, size_t &len_add, DWORD inherit);
-int __stdcall check_file_access (const char *, int);
-
-void set_security_attribute (int attribute, PSECURITY_ATTRIBUTES psa,
+int __stdcall get_file_attribute (HANDLE, path_conv &, mode_t *,
+ __uid32_t *, __gid32_t *)
+ __attribute__ ((regparm (3)));
+int __stdcall set_file_attribute (HANDLE, path_conv &,
+ __uid32_t, __gid32_t, mode_t)
+ __attribute__ ((regparm (3)));
+int __stdcall get_object_sd (HANDLE, security_descriptor &)
+ __attribute__ ((regparm (2)));
+int __stdcall get_object_attribute (HANDLE, __uid32_t *, __gid32_t *, mode_t *)
+ __attribute__ ((regparm (3)));
+int __stdcall set_object_attribute (HANDLE, __uid32_t, __gid32_t, mode_t)
+ __attribute__ ((regparm (3)));
+int __stdcall create_object_sd_from_attribute (HANDLE, __uid32_t, __gid32_t,
+ mode_t, security_descriptor &)
+ __attribute__ ((regparm (3)));
+int __stdcall set_object_sd (HANDLE, security_descriptor &, bool)
+ __attribute__ ((regparm (3)));
+
+int __stdcall get_reg_attribute (HKEY hkey, mode_t *, __uid32_t *, __gid32_t *)
+ __attribute__ ((regparm (3)));
+LONG __stdcall get_file_sd (HANDLE fh, path_conv &, security_descriptor &, bool)
+ __attribute__ ((regparm (3)));
+LONG __stdcall set_file_sd (HANDLE fh, path_conv &, security_descriptor &, bool)
+ __attribute__ ((regparm (3)));
+bool __stdcall add_access_allowed_ace (PACL, int, DWORD, PSID, size_t &, DWORD)
+ __attribute__ ((regparm (3)));
+bool __stdcall add_access_denied_ace (PACL, int, DWORD, PSID, size_t &, DWORD)
+ __attribute__ ((regparm (3)));
+int __stdcall check_file_access (path_conv &, int, bool)
+ __attribute__ ((regparm (3)));
+int __stdcall check_registry_access (HANDLE, int, bool)
+ __attribute__ ((regparm (3)));
+
+void set_security_attribute (path_conv &pc, int attribute,
+ PSECURITY_ATTRIBUTES psa,
security_descriptor &sd_buf);
bool get_sids_info (cygpsid, cygpsid, __uid32_t * , __gid32_t *);
-/* Try a subauthentication. */
-HANDLE subauth (struct passwd *pw);
-/* Try creating a token directly. */
+/* sec_acl.cc */
+struct __acl32;
+extern "C" int aclsort32 (int, int, __acl32 *);
+extern "C" int acl32 (const char *, int, int, __acl32 *);
+int getacl (HANDLE, path_conv &, int, __acl32 *);
+int setacl (HANDLE, path_conv &, int, __acl32 *, bool &);
+
+/* Set impersonation or restricted token. */
+void set_imp_token (HANDLE token, int type);
+/* Function creating a token by calling NtCreateToken. */
HANDLE create_token (cygsid &usersid, user_groups &groups, struct passwd * pw);
+/* LSA authentication function. */
+HANDLE lsaauth (cygsid &, user_groups &, struct passwd *);
+/* LSA private key storage authentication, same as when using service logons. */
+HANDLE lsaprivkeyauth (struct passwd *pw);
/* Verify an existing token */
bool verify_token (HANDLE token, cygsid &usersid, user_groups &groups, bool *pintern = NULL);
+/* Get groups of a user */
+bool get_server_groups (cygsidlist &grp_list, PSID usersid, struct passwd *pw);
/* Extract U-domain\user field from passwd entry. */
-void extract_nt_dom_user (const struct passwd *pw, char *domain, char *user);
+void extract_nt_dom_user (const struct passwd *pw, PWCHAR domain, PWCHAR user);
/* Get default logonserver for a domain. */
-bool get_logon_server (const char * domain, char * server, WCHAR *wserver = NULL);
+bool get_logon_server (PWCHAR domain, PWCHAR wserver, bool rediscovery);
+
+HANDLE open_local_policy (ACCESS_MASK access);
/* sec_helper.cc: Security helper functions. */
-int set_process_privilege (const char *privilege, bool enable = true, bool use_thread = false);
+int set_privilege (HANDLE token, DWORD privilege, bool enable);
+void set_cygwin_privileges (HANDLE token);
+
+#define _push_thread_privilege(_priv, _val, _check) { \
+ HANDLE _dup_token = NULL; \
+ HANDLE _token = (cygheap->user.issetuid () && (_check)) \
+ ? cygheap->user.primary_token () : hProcToken; \
+ if (!DuplicateTokenEx (_token, MAXIMUM_ALLOWED, NULL, \
+ SecurityImpersonation, TokenImpersonation, \
+ &_dup_token)) \
+ debug_printf ("DuplicateTokenEx: %E"); \
+ else if (!ImpersonateLoggedOnUser (_dup_token)) \
+ debug_printf ("ImpersonateLoggedOnUser: %E"); \
+ else \
+ set_privilege (_dup_token, (_priv), (_val));
+
+#define push_thread_privilege(_priv, _val) _push_thread_privilege(_priv,_val,1)
+#define push_self_privilege(_priv, _val) _push_thread_privilege(_priv,_val,0)
+
+#define pop_thread_privilege() \
+ if (_dup_token) \
+ { \
+ if (!cygheap->user.issetuid ()) \
+ RevertToSelf (); \
+ else \
+ cygheap->user.reimpersonate (); \
+ CloseHandle (_dup_token); \
+ } \
+ }
+
+#define pop_self_privilege() pop_thread_privilege()
/* shared.cc: */
-/* Retrieve a security descriptor that allows all access */
-SECURITY_DESCRIPTOR *__stdcall get_null_sd (void);
/* Various types of security attributes for use in Create* functions. */
extern SECURITY_ATTRIBUTES sec_none, sec_none_nih, sec_all, sec_all_nih;
-extern SECURITY_ATTRIBUTES *__stdcall __sec_user (PVOID sa_buf, PSID sid1, PSID sid2,
- DWORD access2, BOOL inherit)
- __attribute__ ((regparm (3)));
-extern bool sec_acl (PACL acl, bool original, bool admins, PSID sid1 = NO_SID,
+extern SECURITY_ATTRIBUTES *__stdcall __sec_user (PVOID, PSID, PSID,
+ DWORD, BOOL)
+ __attribute__ ((regparm (3)));
+extern PSECURITY_DESCRIPTOR _everyone_sd (void *buf, ACCESS_MASK access);
+#define everyone_sd(access) (_everyone_sd (alloca (SD_MIN_SIZE), (access)))
+
+#define sec_none_cloexec(f) (((f) & O_CLOEXEC ? &sec_none_nih : &sec_none))
+
+extern bool sec_acl (PACL acl, bool original, bool admins, PSID sid1 = NO_SID,
PSID sid2 = NO_SID, DWORD access2 = 0);
-int __stdcall NTReadEA (const char *file, const char *attrname, char *buf, int len);
-BOOL __stdcall NTWriteEA (const char *file, const char *attrname, const char *buf, int len);
+ssize_t __stdcall read_ea (HANDLE, path_conv &, const char *,
+ char *, size_t)
+ __attribute__ ((regparm (3)));
+int __stdcall write_ea (HANDLE, path_conv &, const char *, const char *,
+ size_t, int)
+ __attribute__ ((regparm (3)));
+/* Note: sid1 is usually (read: currently always) the current user's
+ effective sid (cygheap->user.sid ()). */
extern inline SECURITY_ATTRIBUTES *
-sec_user_nih (char sa_buf[], PSID sid1 = NULL, PSID sid2 = NULL, DWORD access2 = 0)
+sec_user_nih (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
+ DWORD access2 = 0)
{
return __sec_user (sa_buf, sid1, sid2, access2, FALSE);
}
extern inline SECURITY_ATTRIBUTES *
-sec_user (char sa_buf[], PSID sid1 = NULL, PSID sid2 = NULL, DWORD access2 = 0)
+sec_user (SECURITY_ATTRIBUTES *sa_buf, PSID sid1, PSID sid2 = NULL,
+ DWORD access2 = 0)
{
return __sec_user (sa_buf, sid1, sid2, access2, TRUE);
}
+
#endif /*_SECURITY_H*/
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