cecb74ae47
inheritance/permission. * spawn.cc (spawn_guts): Ditto. * security.cc (create_token): Initialize token so that it is not tested for bogus value later. Use sec_user to control process/thread creation. * security.h (__sec_user): Rename declaration from sec_user. (sec_user_nih): Declare here as inline function wrapper for __sec_user. (sec_user): Ditto. * sigproc.cc (czombies): Allocate a character array for zombies to avoid constructor overhead (extremely hackish, I know). (cpchildren): Ditto. (pchildren): New define. (zombies): Ditto. (getsem): Use sec_user_nih to control semaphore inheritance/permission.
219 lines
6.8 KiB
C++
219 lines
6.8 KiB
C++
/* security.h: security declarations
|
|
|
|
Copyright 2000, 2001, 2002 Red Hat, Inc.
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#define DONT_INHERIT (0)
|
|
#define INHERIT_ALL (CONTAINER_INHERIT_ACE|OBJECT_INHERIT_ACE)
|
|
#define INHERIT_ONLY (INHERIT_ONLY_ACE|CONTAINER_INHERIT_ACE|OBJECT_INHERIT_ACE)
|
|
|
|
#define DEFAULT_UID DOMAIN_USER_RID_ADMIN
|
|
#define DEFAULT_GID DOMAIN_ALIAS_RID_ADMINS
|
|
|
|
#define MAX_SID_LEN 40
|
|
|
|
#define NO_SID ((PSID)NULL)
|
|
|
|
class cygsid {
|
|
PSID psid;
|
|
char sbuf[MAX_SID_LEN];
|
|
|
|
const PSID getfromstr (const char *nsidstr);
|
|
PSID get_sid (DWORD s, DWORD cnt, DWORD *r);
|
|
|
|
inline const PSID assign (const PSID nsid)
|
|
{
|
|
if (!nsid)
|
|
psid = NO_SID;
|
|
else
|
|
{
|
|
psid = (PSID) sbuf;
|
|
CopySid (MAX_SID_LEN, psid, nsid);
|
|
}
|
|
return psid;
|
|
}
|
|
|
|
public:
|
|
inline operator const PSID () { return psid; }
|
|
|
|
inline const PSID operator= (cygsid &nsid)
|
|
{ return assign (nsid); }
|
|
inline const PSID operator= (const PSID nsid)
|
|
{ return assign (nsid); }
|
|
inline const PSID operator= (const char *nsidstr)
|
|
{ return getfromstr (nsidstr); }
|
|
|
|
inline cygsid () : psid ((PSID) sbuf) {}
|
|
inline cygsid (const PSID nsid) { *this = nsid; }
|
|
inline cygsid (const char *nstrsid) { *this = nstrsid; }
|
|
|
|
inline PSID set () { return psid = (PSID) sbuf; }
|
|
|
|
BOOL getfrompw (const struct passwd *pw);
|
|
BOOL getfromgr (const struct __group16 *gr);
|
|
|
|
int get_id (BOOL search_grp, int *type = NULL);
|
|
inline int get_uid () { return get_id (FALSE); }
|
|
inline int get_gid () { return get_id (TRUE); }
|
|
|
|
char *string (char *nsidstr) const;
|
|
|
|
inline BOOL operator== (const PSID nsid) const
|
|
{
|
|
if (!psid || !nsid)
|
|
return nsid == psid;
|
|
return EqualSid (psid, nsid);
|
|
}
|
|
inline BOOL operator== (const char *nsidstr) const
|
|
{
|
|
cygsid nsid (nsidstr);
|
|
return *this == nsid;
|
|
}
|
|
inline BOOL operator!= (const PSID nsid) const
|
|
{ return !(*this == nsid); }
|
|
inline BOOL operator!= (const char *nsidstr) const
|
|
{ return !(*this == nsidstr); }
|
|
|
|
void debug_print (const char *prefix = NULL) const
|
|
{
|
|
char buf[256];
|
|
debug_printf ("%s %s", prefix ?: "", string (buf) ?: "NULL");
|
|
}
|
|
};
|
|
|
|
class cygsidlist {
|
|
public:
|
|
int count;
|
|
cygsid *sids;
|
|
|
|
cygsidlist () : count (0), sids (NULL) {}
|
|
~cygsidlist () { delete [] sids; }
|
|
|
|
BOOL add (cygsid &nsi)
|
|
{
|
|
cygsid *tmp = new cygsid [count + 1];
|
|
if (!tmp)
|
|
return FALSE;
|
|
for (int i = 0; i < count; ++i)
|
|
tmp[i] = sids[i];
|
|
delete [] sids;
|
|
sids = tmp;
|
|
sids[count++] = nsi;
|
|
return TRUE;
|
|
}
|
|
BOOL add (const PSID nsid) { return add (nsid); }
|
|
BOOL add (const char *sidstr)
|
|
{ cygsid nsi (sidstr); return add (nsi); }
|
|
|
|
BOOL operator+= (cygsid &si) { return add (si); }
|
|
BOOL operator+= (const char *sidstr) { return add (sidstr); }
|
|
|
|
BOOL contains (cygsid &sid) const
|
|
{
|
|
for (int i = 0; i < count; ++i)
|
|
if (sids[i] == sid)
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
void debug_print (const char *prefix = NULL) const
|
|
{
|
|
debug_printf ("-- begin sidlist ---");
|
|
if (!count)
|
|
debug_printf ("No elements");
|
|
for (int i = 0; i < count; ++i)
|
|
sids[i].debug_print (prefix);
|
|
debug_printf ("-- ende sidlist ---");
|
|
}
|
|
};
|
|
|
|
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_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;
|
|
|
|
inline BOOL
|
|
legal_sid_type (SID_NAME_USE type)
|
|
{
|
|
return type == SidTypeUser || type == SidTypeGroup
|
|
|| type == SidTypeAlias || type == SidTypeWellKnownGroup;
|
|
}
|
|
|
|
extern BOOL allow_ntea;
|
|
extern BOOL allow_ntsec;
|
|
extern BOOL allow_smbntsec;
|
|
|
|
/* These both functions are needed to allow walking through the passwd
|
|
and group lists so they are somehow security related. Besides that
|
|
I didn't find a better place to declare them. */
|
|
extern struct passwd *internal_getpwent (int);
|
|
extern struct __group16 *internal_getgrent (int);
|
|
|
|
/* File manipulation */
|
|
int __stdcall set_process_privileges ();
|
|
int __stdcall get_file_attribute (int, const char *, int *,
|
|
__uid16_t * = NULL, __gid16_t * = NULL);
|
|
int __stdcall set_file_attribute (int, const char *, int);
|
|
int __stdcall set_file_attribute (int, const char *, __uid16_t, __gid16_t, int, const char *);
|
|
LONG __stdcall read_sd(const char *file, PSECURITY_DESCRIPTOR sd_buf, LPDWORD sd_size);
|
|
LONG __stdcall write_sd(const char *file, PSECURITY_DESCRIPTOR sd_buf, DWORD sd_size);
|
|
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);
|
|
|
|
void set_security_attribute (int attribute, PSECURITY_ATTRIBUTES psa,
|
|
void *sd_buf, DWORD sd_buf_size);
|
|
|
|
/* Try a subauthentication. */
|
|
HANDLE subauth (struct passwd *pw);
|
|
/* Try creating a token directly. */
|
|
HANDLE create_token (cygsid &usersid, cygsid &pgrpsid);
|
|
|
|
/* Extract U-domain\user field from passwd entry. */
|
|
void extract_nt_dom_user (const struct passwd *pw, char *domain, char *user);
|
|
/* Get default logonserver and domain for this box. */
|
|
BOOL get_logon_server_and_user_domain (char *logonserver, char *domain);
|
|
|
|
/* sec_helper.cc: Security helper functions. */
|
|
BOOL __stdcall is_grp_member (__uid16_t uid, __gid16_t gid);
|
|
/* `lookup_name' should be called instead of LookupAccountName.
|
|
* logsrv may be NULL, in this case only the local system is used for lookup.
|
|
* The buffer for ret_sid (40 Bytes) has to be allocated by the caller! */
|
|
BOOL __stdcall lookup_name (const char *, const char *, PSID);
|
|
int set_process_privilege (const char *privilege, BOOL enable = TRUE);
|
|
|
|
/* 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 sid2, BOOL inherit)
|
|
__attribute__ ((regparm (3)));
|
|
|
|
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);
|
|
|
|
extern inline SECURITY_ATTRIBUTES *
|
|
sec_user_nih (char sa_buf[], PSID sid = NULL)
|
|
{
|
|
return allow_ntsec ? __sec_user (sa_buf, sid, FALSE) : &sec_none_nih;
|
|
}
|
|
|
|
extern inline SECURITY_ATTRIBUTES *
|
|
sec_user (char sa_buf[], PSID sid = NULL)
|
|
{
|
|
return allow_ntsec ? __sec_user (sa_buf, sid, TRUE) : &sec_none_nih;
|
|
}
|