1  /*
       2   * Copyright (c) 2010, Oracle America, Inc.
       3   *
       4   * Redistribution and use in source and binary forms, with or without
       5   * modification, are permitted provided that the following conditions are
       6   * met:
       7   *
       8   *     * Redistributions of source code must retain the above copyright
       9   *       notice, this list of conditions and the following disclaimer.
      10   *     * Redistributions in binary form must reproduce the above
      11   *       copyright notice, this list of conditions and the following
      12   *       disclaimer in the documentation and/or other materials
      13   *       provided with the distribution.
      14   *     * Neither the name of the "Oracle America, Inc." nor the names of its
      15   *       contributors may be used to endorse or promote products derived
      16   *       from this software without specific prior written permission.
      17   *
      18   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      19   *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      20   *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
      21   *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
      22   *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
      23   *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      24   *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
      25   *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      26   *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
      27   *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      28   *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      29   *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      30   */
      31  /*
      32   * auth_none.c
      33   * Creates a client authentication handle for passing "null"
      34   * credentials and verifiers to remote systems.
      35   */
      36  
      37  #include <rpc/rpc.h>
      38  #include <libc-lock.h>
      39  #include <shlib-compat.h>
      40  
      41  #define MAX_MARSHAL_SIZE 20
      42  
      43  /*
      44   * Authenticator operations routines
      45   */
      46  static void authnone_verf (AUTH *);
      47  static void authnone_destroy (AUTH *);
      48  static bool_t authnone_marshal (AUTH *, XDR *);
      49  static bool_t authnone_validate (AUTH *, struct opaque_auth *);
      50  static bool_t authnone_refresh (AUTH *);
      51  
      52  static const struct auth_ops ops = {
      53    authnone_verf,
      54    authnone_marshal,
      55    authnone_validate,
      56    authnone_refresh,
      57    authnone_destroy
      58  };
      59  
      60  /* Internal data and routines */
      61  
      62  struct authnone_private_s {
      63    AUTH no_client;
      64    char marshalled_client[MAX_MARSHAL_SIZE];
      65    u_int mcnt;
      66  };
      67  
      68  static struct authnone_private_s authnone_private;
      69  __libc_once_define(static, authnone_private_guard);
      70  
      71  static void authnone_create_once (void);
      72  
      73  static void
      74  authnone_create_once (void)
      75  {
      76    struct authnone_private_s *ap;
      77    XDR xdr_stream;
      78    XDR *xdrs;
      79  
      80    ap = &authnone_private;
      81  
      82    ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
      83    ap->no_client.ah_ops = (struct auth_ops *) &ops;
      84    xdrs = &xdr_stream;
      85    xdrmem_create (xdrs, ap->marshalled_client,
      86  		 (u_int) MAX_MARSHAL_SIZE, XDR_ENCODE);
      87    (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_cred);
      88    (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_verf);
      89    ap->mcnt = XDR_GETPOS (xdrs);
      90    XDR_DESTROY (xdrs);
      91  }
      92  
      93  AUTH *
      94  authnone_create (void)
      95  {
      96    __libc_once (authnone_private_guard, authnone_create_once);
      97    return &authnone_private.no_client;
      98  }
      99  libc_hidden_nolink_sunrpc (authnone_create, GLIBC_2_0)
     100  
     101  static bool_t
     102  authnone_marshal (AUTH *client, XDR *xdrs)
     103  {
     104    struct authnone_private_s *ap;
     105  
     106    /* authnone_create returned authnone_private->no_client, which is
     107       the first field of struct authnone_private_s.  */
     108    ap = (struct authnone_private_s *) client;
     109    if (ap == NULL)
     110      return FALSE;
     111    return (*xdrs->x_ops->x_putbytes) (xdrs, ap->marshalled_client, ap->mcnt);
     112  }
     113  
     114  static void
     115  authnone_verf (AUTH *auth)
     116  {
     117  }
     118  
     119  static bool_t
     120  authnone_validate (AUTH *auth, struct opaque_auth *oa)
     121  {
     122    return TRUE;
     123  }
     124  
     125  static bool_t
     126  authnone_refresh (AUTH *auth)
     127  {
     128    return FALSE;
     129  }
     130  
     131  static void
     132  authnone_destroy (AUTH *auth)
     133  {
     134  }