sunrpc/auth_none.c

   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 <bits/libc-lock.h>
  39
  40 #define MAX_MARSHAL_SIZE 20
  41
  42 /*
  43  * Authenticator operations routines
  44  */
  45 static void authnone_verf (AUTH *);
  46 static void authnone_destroy (AUTH *);
  47 static bool_t authnone_marshal (AUTH *, XDR *);
  48 static bool_t authnone_validate (AUTH *, struct opaque_auth *);
  49 static bool_t authnone_refresh (AUTH *);
  50
  51 static const struct auth_ops ops = {
  52   authnone_verf,
  53   authnone_marshal,
  54   authnone_validate,
  55   authnone_refresh,
  56   authnone_destroy
  57 };
  58
  59 /* Internal data and routines */
  60
  61 struct authnone_private_s {
  62   AUTH no_client;
  63   char marshalled_client[MAX_MARSHAL_SIZE];
  64   u_int mcnt;
  65 };
  66
  67 static struct authnone_private_s authnone_private;
  68 __libc_once_define(static, authnone_private_guard);
  69
  70 static void authnone_create_once (void);
  71
  72 static void
  73 authnone_create_once (void)
  74 {
  75   struct authnone_private_s *ap;
  76   XDR xdr_stream;
  77   XDR *xdrs;
  78
  79   ap = &authnone_private;
  80
  81   ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
  82   ap->no_client.ah_ops = (struct auth_ops *) &ops;
  83   xdrs = &xdr_stream;
  84   xdrmem_create (xdrs, ap->marshalled_client,
  85                  (u_int) MAX_MARSHAL_SIZE, XDR_ENCODE);
  86   (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_cred);
  87   (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_verf);
  88   ap->mcnt = XDR_GETPOS (xdrs);
  89   XDR_DESTROY (xdrs);
  90 }
  91
  92 AUTH *
  93 authnone_create (void)
  94 {
  95   __libc_once (authnone_private_guard, authnone_create_once);
  96   return &authnone_private.no_client;
  97 }
  98 libc_hidden_nolink_sunrpc (authnone_create, GLIBC_2_0)
  99
 100 static bool_t
 101 authnone_marshal (AUTH *client, XDR *xdrs)
 102 {
 103   struct authnone_private_s *ap;
 104
 105   /* authnone_create returned authnone_private->no_client, which is
 106      the first field of struct authnone_private_s.  */
 107   ap = (struct authnone_private_s *) client;
 108   if (ap == NULL)
 109     return FALSE;
 110   return (*xdrs->x_ops->x_putbytes) (xdrs, ap->marshalled_client, ap->mcnt);
 111 }
 112
 113 static void
 114 authnone_verf (AUTH *auth)
 115 {
 116 }
 117
 118 static bool_t
 119 authnone_validate (AUTH *auth, struct opaque_auth *oa)
 120 {
 121   return TRUE;
 122 }
 123
 124 static bool_t
 125 authnone_refresh (AUTH *auth)
 126 {
 127   return FALSE;
 128 }
 129
 130 static void
 131 authnone_destroy (AUTH *auth)
 132 {
 133 }