newlib-cygwin/winsup/cygwin/security.h

/* security.h: security declarations

   Copyright 2000, 2001 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);

public:
  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 (struct passwd *pw);
  BOOL getfromgr (struct group *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);

  inline const PSID operator= (const PSID nsid)
    {
      if (!nsid)
        psid = NULL;
      else
        {
	  psid = (PSID) sbuf;
	  CopySid (MAX_SID_LEN, psid, nsid);
	}
      return psid;
    }
  inline const PSID operator= (const char *nsidstr)
    { return getfromstr (nsidstr); }

  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); }

  inline operator const PSID () { return psid; }
};

extern cygsid well_known_admin_sid;
extern cygsid well_known_system_sid;
extern cygsid well_known_creator_owner_sid;
extern cygsid well_known_world_sid;

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 group *internal_getgrent (int);

/* File manipulation */
int __stdcall set_process_privileges ();
int __stdcall get_file_attribute (int, const char *, int *,
				  uid_t * = NULL, gid_t * = NULL);
int __stdcall set_file_attribute (int, const char *, int);
int __stdcall set_file_attribute (int, const char *, uid_t, gid_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);

/* Try a subauthentication. */
HANDLE subauth (struct passwd *pw);

/* sec_helper.cc: Security helper functions. */
BOOL __stdcall is_grp_member (uid_t uid, gid_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 = NULL, BOOL inherit = TRUE);
extern SECURITY_ATTRIBUTES *__stdcall sec_user_nih (PVOID sa_buf, PSID sid2 = NULL);

int __stdcall NTReadEA (const char *file, const char *attrname, char *buf, int len);
BOOL __stdcall NTWriteEA (const char *file, const char *attrname, char *buf, int len);