1/*	$NetBSD: auth_none.c,v 1.13 2000/01/22 22:19:17 mycroft Exp $	*/
2
3/*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 *   this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 *   this list of conditions and the following disclaimer in the documentation
13 *   and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, 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 "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#if defined(LIBC_SCCS) && !defined(lint)
32static char *sccsid2 = "@(#)auth_none.c 1.19 87/08/11 Copyr 1984 Sun Micro";
33static char *sccsid = "@(#)auth_none.c	2.1 88/07/29 4.0 RPCSRC";
34#endif
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38/*
39 * auth_none.c
40 * Creates a client authentication handle for passing "null"
41 * credentials and verifiers to remote systems.
42 *
43 * Copyright (C) 1984, Sun Microsystems, Inc.
44 */
45
46#include "namespace.h"
47#include "reentrant.h"
48#include <assert.h>
49#include <stdlib.h>
50#include <rpc/types.h>
51#include <rpc/xdr.h>
52#include <rpc/auth.h>
53#include "un-namespace.h"
54#include "mt_misc.h"
55
56#define MAX_MARSHAL_SIZE 20
57
58/*
59 * Authenticator operations routines
60 */
61
62static bool_t authnone_marshal (AUTH *, XDR *);
63static void authnone_verf (AUTH *);
64static bool_t authnone_validate (AUTH *, struct opaque_auth *);
65static bool_t authnone_refresh (AUTH *, void *);
66static void authnone_destroy (AUTH *);
67
68extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
69
70static struct auth_ops *authnone_ops(void);
71
72static struct authnone_private {
73	AUTH	no_client;
74	char	marshalled_client[MAX_MARSHAL_SIZE];
75	u_int	mcnt;
76} *authnone_private;
77
78AUTH *
79authnone_create(void)
80{
81	struct authnone_private *ap = authnone_private;
82	XDR xdr_stream;
83	XDR *xdrs;
84
85	mutex_lock(&authnone_lock);
86	if (ap == NULL) {
87		ap = calloc(1, sizeof (*ap));
88		if (ap == NULL) {
89			mutex_unlock(&authnone_lock);
90			return (0);
91		}
92		authnone_private = ap;
93	}
94	if (!ap->mcnt) {
95		ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
96		ap->no_client.ah_ops = authnone_ops();
97		xdrs = &xdr_stream;
98		xdrmem_create(xdrs, ap->marshalled_client,
99		    (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
100		(void)xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
101		(void)xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
102		ap->mcnt = XDR_GETPOS(xdrs);
103		XDR_DESTROY(xdrs);
104	}
105	mutex_unlock(&authnone_lock);
106	return (&ap->no_client);
107}
108
109/*ARGSUSED*/
110static bool_t
111authnone_marshal(AUTH *client, XDR *xdrs)
112{
113	struct authnone_private *ap;
114	bool_t dummy;
115
116	assert(xdrs != NULL);
117
118	ap = authnone_private;
119	if (ap == NULL) {
120		mutex_unlock(&authnone_lock);
121		return (FALSE);
122	}
123	dummy = (*xdrs->x_ops->x_putbytes)(xdrs,
124	    ap->marshalled_client, ap->mcnt);
125	mutex_unlock(&authnone_lock);
126	return (dummy);
127}
128
129/* All these unused parameters are required to keep ANSI-C from grumbling */
130/*ARGSUSED*/
131static void
132authnone_verf(AUTH *client)
133{
134}
135
136/*ARGSUSED*/
137static bool_t
138authnone_validate(AUTH *client, struct opaque_auth *opaque)
139{
140
141	return (TRUE);
142}
143
144/*ARGSUSED*/
145static bool_t
146authnone_refresh(AUTH *client, void *dummy)
147{
148
149	return (FALSE);
150}
151
152/*ARGSUSED*/
153static void
154authnone_destroy(AUTH *client)
155{
156}
157
158static struct auth_ops *
159authnone_ops(void)
160{
161	static struct auth_ops ops;
162
163/* VARIABLES PROTECTED BY ops_lock: ops */
164
165	mutex_lock(&ops_lock);
166	if (ops.ah_nextverf == NULL) {
167		ops.ah_nextverf = authnone_verf;
168		ops.ah_marshal = authnone_marshal;
169		ops.ah_validate = authnone_validate;
170		ops.ah_refresh = authnone_refresh;
171		ops.ah_destroy = authnone_destroy;
172	}
173	mutex_unlock(&ops_lock);
174	return (&ops);
175}
176