lib/libc/rpc/auth_none.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)auth_none.c      1.19 87/08/11 Copyr 1984 Sun Micro
  29  * @(#)auth_none.c      2.1 88/07/29 4.0 RPCSRC
  30  * $NetBSD: auth_none.c,v 1.13 2000/01/22 22:19:17 mycroft Exp $
  31  * $FreeBSD: src/lib/libc/rpc/auth_none.c,v 1.14 2006/02/27 22:10:58 deischen Exp $
  32  */
  33
  34 /*
  35  * auth_none.c
  36  * Creates a client authentication handle for passing "null"
  37  * credentials and verifiers to remote systems.
  38  *
  39  * Copyright (C) 1984, Sun Microsystems, Inc.
  40  */
  41
  42 #include "namespace.h"
  43 #include "reentrant.h"
  44 #include <assert.h>
  45 #include <stdlib.h>
  46 #include <rpc/types.h>
  47 #include <rpc/xdr.h>
  48 #include <rpc/auth.h>
  49 #include "un-namespace.h"
  50 #include "mt_misc.h"
  51
  52 #define MAX_MARSHAL_SIZE 20
  53
  54 /*
  55  * Authenticator operations routines
  56  */
  57
  58 static bool_t   authnone_marshal(AUTH *, XDR *);
  59 static void     authnone_verf(AUTH *);
  60 static bool_t   authnone_validate(AUTH *, struct opaque_auth *);
  61 static bool_t   authnone_refresh(AUTH *, void *);
  62 static void     authnone_destroy(AUTH *);
  63
  64 static struct auth_ops  *authnone_ops(void);
  65
  66 static struct authnone_private {
  67         AUTH    no_client;
  68         char    marshalled_client[MAX_MARSHAL_SIZE];
  69         u_int   mcnt;
  70 } *authnone_private;
  71
  72 AUTH *
  73 authnone_create(void)
  74 {
  75         struct authnone_private *ap = authnone_private;
  76         XDR xdr_stream;
  77         XDR *xdrs;
  78
  79         mutex_lock(&authnone_lock);
  80         if (ap == NULL) {
  81                 ap = (struct authnone_private *)calloc(1, sizeof (*ap));
  82                 if (ap == NULL) {
  83                         mutex_unlock(&authnone_lock);
  84                         return (0);
  85                 }
  86                 authnone_private = ap;
  87         }
  88         if (!ap->mcnt) {
  89                 ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
  90                 ap->no_client.ah_ops = authnone_ops();
  91                 xdrs = &xdr_stream;
  92                 xdrmem_create(xdrs, ap->marshalled_client,
  93                     (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
  94                 xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
  95                 xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
  96                 ap->mcnt = XDR_GETPOS(xdrs);
  97                 XDR_DESTROY(xdrs);
  98         }
  99         mutex_unlock(&authnone_lock);
 100         return (&ap->no_client);
 101 }
 102
 103 /*ARGSUSED*/
 104 static bool_t
 105 authnone_marshal(AUTH *client __unused, XDR *xdrs)
 106 {
 107         struct authnone_private *ap;
 108         bool_t dummy;
 109
 110         assert(xdrs != NULL);
 111
 112         ap = authnone_private;
 113         if (ap == NULL) {
 114                 mutex_unlock(&authnone_lock);
 115                 return (FALSE);
 116         }
 117         dummy = (*xdrs->x_ops->x_putbytes)(xdrs,
 118             ap->marshalled_client, ap->mcnt);
 119         mutex_unlock(&authnone_lock);
 120         return (dummy);
 121 }
 122
 123 /* All these unused parameters are required to keep ANSI-C from grumbling */
 124 /*ARGSUSED*/
 125 static void
 126 authnone_verf(AUTH *client __unused)
 127 {
 128 }
 129
 130 /*ARGSUSED*/
 131 static bool_t
 132 authnone_validate(AUTH *client __unused, struct opaque_auth *opaque __unused)
 133 {
 134
 135         return (TRUE);
 136 }
 137
 138 /*ARGSUSED*/
 139 static bool_t
 140 authnone_refresh(AUTH *client __unused, void *dummy __unused)
 141 {
 142
 143         return (FALSE);
 144 }
 145
 146 /*ARGSUSED*/
 147 static void
 148 authnone_destroy(AUTH *client __unused)
 149 {
 150 }
 151
 152 static struct auth_ops *
 153 authnone_ops(void)
 154 {
 155         static struct auth_ops ops;
 156
 157 /* VARIABLES PROTECTED BY ops_lock: ops */
 158
 159         mutex_lock(&ops_lock);
 160         if (ops.ah_nextverf == NULL) {
 161                 ops.ah_nextverf = authnone_verf;
 162                 ops.ah_marshal = authnone_marshal;
 163                 ops.ah_validate = authnone_validate;
 164                 ops.ah_refresh = authnone_refresh;
 165                 ops.ah_destroy = authnone_destroy;
 166         }
 167         mutex_unlock(&ops_lock);
 168         return (&ops);
 169 }