1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
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#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
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/*
43 * Modified from auth_none.c to expect a reply verifier of "STARTTLS"
44 * for the RPC-over-TLS STARTTLS command.
45 */
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/lock.h>
51#include <sys/malloc.h>
52#include <sys/mutex.h>
53
54#include <rpc/types.h>
55#include <rpc/xdr.h>
56#include <rpc/auth.h>
57#include <rpc/clnt.h>
58#include <rpc/rpcsec_tls.h>
59
60#define MAX_MARSHAL_SIZE 20
61
62/*
63 * Authenticator operations routines
64 */
65
66static bool_t authtls_marshal (AUTH *, uint32_t, XDR *, struct mbuf *);
67static void authtls_verf (AUTH *);
68static bool_t authtls_validate (AUTH *, uint32_t, struct opaque_auth *,
69    struct mbuf **);
70static bool_t authtls_refresh (AUTH *, void *);
71static void authtls_destroy (AUTH *);
72
73static struct auth_ops authtls_ops = {
74	.ah_nextverf =		authtls_verf,
75	.ah_marshal =		authtls_marshal,
76	.ah_validate =		authtls_validate,
77	.ah_refresh =		authtls_refresh,
78	.ah_destroy =		authtls_destroy,
79};
80
81struct authtls_private {
82	AUTH	no_client;
83	char	mclient[MAX_MARSHAL_SIZE];
84	u_int	mcnt;
85};
86
87static struct authtls_private authtls_private;
88static struct opaque_auth _tls_null_auth;
89
90static void
91authtls_init(void *dummy)
92{
93	struct authtls_private *ap = &authtls_private;
94	XDR xdrs;
95
96	_tls_null_auth.oa_flavor = AUTH_TLS;
97	_tls_null_auth.oa_base = NULL;
98	_tls_null_auth.oa_length = 0;
99	ap->no_client.ah_cred = _tls_null_auth;
100	ap->no_client.ah_verf = _null_auth;
101	ap->no_client.ah_ops = &authtls_ops;
102	xdrmem_create(&xdrs, ap->mclient, MAX_MARSHAL_SIZE, XDR_ENCODE);
103	xdr_opaque_auth(&xdrs, &ap->no_client.ah_cred);
104	xdr_opaque_auth(&xdrs, &ap->no_client.ah_verf);
105	ap->mcnt = XDR_GETPOS(&xdrs);
106	XDR_DESTROY(&xdrs);
107}
108SYSINIT(authtls_init, SI_SUB_KMEM, SI_ORDER_ANY, authtls_init, NULL);
109
110AUTH *
111authtls_create(void)
112{
113	struct authtls_private *ap = &authtls_private;
114
115	return (&ap->no_client);
116}
117
118/*ARGSUSED*/
119static bool_t
120authtls_marshal(AUTH *client, uint32_t xid, XDR *xdrs, struct mbuf *args)
121{
122	struct authtls_private *ap = &authtls_private;
123
124	KASSERT(xdrs != NULL, ("authtls_marshal: xdrs is null"));
125
126	if (!XDR_PUTBYTES(xdrs, ap->mclient, ap->mcnt))
127		return (FALSE);
128
129	xdrmbuf_append(xdrs, args);
130
131	return (TRUE);
132}
133
134/* All these unused parameters are required to keep ANSI-C from grumbling */
135/*ARGSUSED*/
136static void
137authtls_verf(AUTH *client)
138{
139}
140
141/*ARGSUSED*/
142static bool_t
143authtls_validate(AUTH *client, uint32_t xid, struct opaque_auth *opaque,
144    struct mbuf **mrepp)
145{
146	size_t strsiz;
147
148	strsiz = strlen(RPCTLS_START_STRING);
149	/* The verifier must be the string RPCTLS_START_STRING. */
150	if (opaque != NULL &&
151	    (opaque->oa_length != strsiz || memcmp(opaque->oa_base,
152	     RPCTLS_START_STRING, strsiz) != 0))
153		return (FALSE);
154	return (TRUE);
155}
156
157/*ARGSUSED*/
158static bool_t
159authtls_refresh(AUTH *client, void *dummy)
160{
161
162	return (FALSE);
163}
164
165/*ARGSUSED*/
166static void
167authtls_destroy(AUTH *client)
168{
169}
170