1 /* $NetBSD: auth_none.c,v 1.13 2000/01/22 22:19:17 mycroft Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * auth_none.c
35 * Creates a client authentication handle for passing "null"
36 * credentials and verifiers to remote systems.
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 */
40
41 #include "namespace.h"
42 #include "reentrant.h"
43 #include <assert.h>
44 #include <stdlib.h>
45 #include <rpc/types.h>
46 #include <rpc/xdr.h>
47 #include <rpc/auth.h>
48 #include "un-namespace.h"
49 #include "mt_misc.h"
50
51 #define MAX_MARSHAL_SIZE 20
52
53 /*
54 * Authenticator operations routines
55 */
56
57 static bool_t authnone_marshal (AUTH *, XDR *);
58 static void authnone_verf (AUTH *);
59 static bool_t authnone_validate (AUTH *, struct opaque_auth *);
60 static bool_t authnone_refresh (AUTH *, void *);
61 static void authnone_destroy (AUTH *);
62
63 extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
64
65 static struct auth_ops *authnone_ops(void);
66
67 static struct authnone_private {
68 AUTH no_client;
69 char marshalled_client[MAX_MARSHAL_SIZE];
70 u_int mcnt;
71 } *authnone_private;
72
73 AUTH *
authnone_create(void)74 authnone_create(void)
75 {
76 struct authnone_private *ap = authnone_private;
77 XDR xdr_stream;
78 XDR *xdrs;
79
80 mutex_lock(&authnone_lock);
81 if (ap == NULL) {
82 ap = calloc(1, sizeof (*ap));
83 if (ap == NULL) {
84 mutex_unlock(&authnone_lock);
85 return (0);
86 }
87 authnone_private = ap;
88 }
89 if (!ap->mcnt) {
90 ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
91 ap->no_client.ah_ops = authnone_ops();
92 xdrs = &xdr_stream;
93 xdrmem_create(xdrs, ap->marshalled_client,
94 (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
95 (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
96 (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
97 ap->mcnt = XDR_GETPOS(xdrs);
98 XDR_DESTROY(xdrs);
99 }
100 mutex_unlock(&authnone_lock);
101 return (&ap->no_client);
102 }
103
104 /*ARGSUSED*/
105 static bool_t
authnone_marshal(AUTH * client,XDR * xdrs)106 authnone_marshal(AUTH *client, XDR *xdrs)
107 {
108 struct authnone_private *ap;
109 bool_t dummy;
110
111 assert(xdrs != NULL);
112
113 ap = authnone_private;
114 if (ap == NULL) {
115 mutex_unlock(&authnone_lock);
116 return (FALSE);
117 }
118 dummy = (*xdrs->x_ops->x_putbytes)(xdrs,
119 ap->marshalled_client, ap->mcnt);
120 mutex_unlock(&authnone_lock);
121 return (dummy);
122 }
123
124 /* All these unused parameters are required to keep ANSI-C from grumbling */
125 /*ARGSUSED*/
126 static void
authnone_verf(AUTH * client)127 authnone_verf(AUTH *client)
128 {
129 }
130
131 /*ARGSUSED*/
132 static bool_t
authnone_validate(AUTH * client,struct opaque_auth * opaque)133 authnone_validate(AUTH *client, struct opaque_auth *opaque)
134 {
135
136 return (TRUE);
137 }
138
139 /*ARGSUSED*/
140 static bool_t
authnone_refresh(AUTH * client,void * dummy)141 authnone_refresh(AUTH *client, void *dummy)
142 {
143
144 return (FALSE);
145 }
146
147 /*ARGSUSED*/
148 static void
authnone_destroy(AUTH * client)149 authnone_destroy(AUTH *client)
150 {
151 }
152
153 static struct auth_ops *
authnone_ops(void)154 authnone_ops(void)
155 {
156 static struct auth_ops ops;
157
158 /* VARIABLES PROTECTED BY ops_lock: ops */
159
160 mutex_lock(&ops_lock);
161 if (ops.ah_nextverf == NULL) {
162 ops.ah_nextverf = authnone_verf;
163 ops.ah_marshal = authnone_marshal;
164 ops.ah_validate = authnone_validate;
165 ops.ah_refresh = authnone_refresh;
166 ops.ah_destroy = authnone_destroy;
167 }
168 mutex_unlock(&ops_lock);
169 return (&ops);
170 }
171