lib/libc/rpc/auth_none.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)auth_none.c      1.19 87/08/11 Copyr 1984 Sun Micro
  30  * @(#)auth_none.c      2.1 88/07/29 4.0 RPCSRC
  31  * $NetBSD: auth_none.c,v 1.13 2000/01/22 22:19:17 mycroft Exp $
  32  * $FreeBSD: src/lib/libc/rpc/auth_none.c,v 1.14 2006/02/27 22:10:58 deischen Exp $
  33  * $DragonFly: src/lib/libc/rpc/auth_none.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
  34  */
  35
  36 /*
  37  * auth_none.c
  38  * Creates a client authentication handle for passing "null"
  39  * credentials and verifiers to remote systems.
  40  *
  41  * Copyright (C) 1984, Sun Microsystems, Inc.
  42  */
  43
  44 #include "namespace.h"
  45 #include "reentrant.h"
  46 #include <assert.h>
  47 #include <stdlib.h>
  48 #include <rpc/types.h>
  49 #include <rpc/xdr.h>
  50 #include <rpc/auth.h>
  51 #include "un-namespace.h"
  52 #include "mt_misc.h"
  53
  54 #define MAX_MARSHAL_SIZE 20
  55
  56 /*
  57  * Authenticator operations routines
  58  */
  59
  60 static bool_t   authnone_marshal(AUTH *, XDR *);
  61 static void     authnone_verf(AUTH *);
  62 static bool_t   authnone_validate(AUTH *, struct opaque_auth *);
  63 static bool_t   authnone_refresh(AUTH *, void *);
  64 static void     authnone_destroy(AUTH *);
  65
  66 static struct auth_ops  *authnone_ops(void);
  67
  68 static struct authnone_private {
  69         AUTH    no_client;
  70         char    marshalled_client[MAX_MARSHAL_SIZE];
  71         u_int   mcnt;
  72 } *authnone_private;
  73
  74 AUTH *
  75 authnone_create(void)
  76 {
  77         struct authnone_private *ap = authnone_private;
  78         XDR xdr_stream;
  79         XDR *xdrs;
  80
  81         mutex_lock(&authnone_lock);
  82         if (ap == 0) {
  83                 ap = (struct authnone_private *)calloc(1, sizeof (*ap));
  84                 if (ap == 0) {
  85                         mutex_unlock(&authnone_lock);
  86                         return (0);
  87                 }
  88                 authnone_private = ap;
  89         }
  90         if (!ap->mcnt) {
  91                 ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
  92                 ap->no_client.ah_ops = authnone_ops();
  93                 xdrs = &xdr_stream;
  94                 xdrmem_create(xdrs, ap->marshalled_client,
  95                     (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
  96                 xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
  97                 xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
  98                 ap->mcnt = XDR_GETPOS(xdrs);
  99                 XDR_DESTROY(xdrs);
 100         }
 101         mutex_unlock(&authnone_lock);
 102         return (&ap->no_client);
 103 }
 104
 105 /*ARGSUSED*/
 106 static bool_t
 107 authnone_marshal(AUTH *client, XDR *xdrs)
 108 {
 109         struct authnone_private *ap;
 110         bool_t dummy;
 111
 112         assert(xdrs != NULL);
 113
 114         ap = authnone_private;
 115         if (ap == NULL) {
 116                 mutex_unlock(&authnone_lock);
 117                 return (FALSE);
 118         }
 119         dummy = (*xdrs->x_ops->x_putbytes)(xdrs,
 120             ap->marshalled_client, ap->mcnt);
 121         mutex_unlock(&authnone_lock);
 122         return (dummy);
 123 }
 124
 125 /* All these unused parameters are required to keep ANSI-C from grumbling */
 126 /*ARGSUSED*/
 127 static void
 128 authnone_verf(AUTH *client)
 129 {
 130 }
 131
 132 /*ARGSUSED*/
 133 static bool_t
 134 authnone_validate(AUTH *client, struct opaque_auth *opaque)
 135 {
 136
 137         return (TRUE);
 138 }
 139
 140 /*ARGSUSED*/
 141 static bool_t
 142 authnone_refresh(AUTH *client, void *dummy)
 143 {
 144
 145         return (FALSE);
 146 }
 147
 148 /*ARGSUSED*/
 149 static void
 150 authnone_destroy(AUTH *client)
 151 {
 152 }
 153
 154 static struct auth_ops *
 155 authnone_ops(void)
 156 {
 157         static struct auth_ops ops;
 158
 159 /* VARIABLES PROTECTED BY ops_lock: ops */
 160
 161         mutex_lock(&ops_lock);
 162         if (ops.ah_nextverf == NULL) {
 163                 ops.ah_nextverf = authnone_verf;
 164                 ops.ah_marshal = authnone_marshal;
 165                 ops.ah_validate = authnone_validate;
 166                 ops.ah_refresh = authnone_refresh;
 167                 ops.ah_destroy = authnone_destroy;
 168         }
 169         mutex_unlock(&ops_lock);
 170         return (&ops);
 171 }