auth_none.c revision 330897 
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#if defined(LIBC_SCCS) && !defined(lint)
34static char *sccsid2 = "@(#)auth_none.c 1.19 87/08/11 Copyr 1984 Sun Micro";
35static char *sccsid = "@(#)auth_none.c	2.1 88/07/29 4.0 RPCSRC";
36#endif
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: stable/11/lib/libc/rpc/auth_none.c 330897 2018-03-14 03:19:51Z eadler $");
39
40/*
41 * auth_none.c
42 * Creates a client authentication handle for passing "null"
43 * credentials and verifiers to remote systems.
44 *
45 * Copyright (C) 1984, Sun Microsystems, Inc.
46 */
47
48#include "namespace.h"
49#include "reentrant.h"
50#include <assert.h>
51#include <stdlib.h>
52#include <rpc/types.h>
53#include <rpc/xdr.h>
54#include <rpc/auth.h>
55#include "un-namespace.h"
56#include "mt_misc.h"
57
58#define MAX_MARSHAL_SIZE 20
59
60/*
61 * Authenticator operations routines
62 */
63
64static bool_t authnone_marshal (AUTH *, XDR *);
65static void authnone_verf (AUTH *);
66static bool_t authnone_validate (AUTH *, struct opaque_auth *);
67static bool_t authnone_refresh (AUTH *, void *);
68static void authnone_destroy (AUTH *);
69
70extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
71
72static struct auth_ops *authnone_ops(void);
73
74static struct authnone_private {
75	AUTH	no_client;
76	char	marshalled_client[MAX_MARSHAL_SIZE];
77	u_int	mcnt;
78} *authnone_private;
79
80AUTH *
81authnone_create(void)
82{
83	struct authnone_private *ap = authnone_private;
84	XDR xdr_stream;
85	XDR *xdrs;
86
87	mutex_lock(&authnone_lock);
88	if (ap == NULL) {
89		ap = calloc(1, sizeof (*ap));
90		if (ap == NULL) {
91			mutex_unlock(&authnone_lock);
92			return (0);
93		}
94		authnone_private = ap;
95	}
96	if (!ap->mcnt) {
97		ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
98		ap->no_client.ah_ops = authnone_ops();
99		xdrs = &xdr_stream;
100		xdrmem_create(xdrs, ap->marshalled_client,
101		    (u_int)MAX_MARSHAL_SIZE, XDR_ENCODE);
102		(void)xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
103		(void)xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
104		ap->mcnt = XDR_GETPOS(xdrs);
105		XDR_DESTROY(xdrs);
106	}
107	mutex_unlock(&authnone_lock);
108	return (&ap->no_client);
109}
110
111/*ARGSUSED*/
112static bool_t
113authnone_marshal(AUTH *client, XDR *xdrs)
114{
115	struct authnone_private *ap;
116	bool_t dummy;
117
118	assert(xdrs != NULL);
119
120	ap = authnone_private;
121	if (ap == NULL) {
122		mutex_unlock(&authnone_lock);
123		return (FALSE);
124	}
125	dummy = (*xdrs->x_ops->x_putbytes)(xdrs,
126	    ap->marshalled_client, ap->mcnt);
127	mutex_unlock(&authnone_lock);
128	return (dummy);
129}
130
131/* All these unused parameters are required to keep ANSI-C from grumbling */
132/*ARGSUSED*/
133static void
134authnone_verf(AUTH *client)
135{
136}
137
138/*ARGSUSED*/
139static bool_t
140authnone_validate(AUTH *client, struct opaque_auth *opaque)
141{
142
143	return (TRUE);
144}
145
146/*ARGSUSED*/
147static bool_t
148authnone_refresh(AUTH *client, void *dummy)
149{
150
151	return (FALSE);
152}
153
154/*ARGSUSED*/
155static void
156authnone_destroy(AUTH *client)
157{
158}
159
160static struct auth_ops *
161authnone_ops(void)
162{
163	static struct auth_ops ops;
164
165/* VARIABLES PROTECTED BY ops_lock: ops */
166
167	mutex_lock(&ops_lock);
168	if (ops.ah_nextverf == NULL) {
169		ops.ah_nextverf = authnone_verf;
170		ops.ah_marshal = authnone_marshal;
171		ops.ah_validate = authnone_validate;
172		ops.ah_refresh = authnone_refresh;
173		ops.ah_destroy = authnone_destroy;
174	}
175	mutex_unlock(&ops_lock);
176	return (&ops);
177}
178