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 <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 }