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/*
33 * auth_none.c
34 * Creates a client authentication handle for passing "null"
35 * credentials and verifiers to remote systems.
36 *
37 * Copyright (C) 1984, Sun Microsystems, Inc.
38 */
39
40/*
41 * Modified from auth_none.c to expect a reply verifier of "STARTTLS"
42 * for the RPC-over-TLS STARTTLS command.
43 */
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/lock.h>
49#include <sys/malloc.h>
50#include <sys/mutex.h>
51
52#include <rpc/types.h>
53#include <rpc/xdr.h>
54#include <rpc/auth.h>
55#include <rpc/clnt.h>
56#include <rpc/rpcsec_tls.h>
57
58#define MAX_MARSHAL_SIZE 20
59
60/*
61 * Authenticator operations routines
62 */
63
64static bool_t authtls_marshal (AUTH *, uint32_t, XDR *, struct mbuf *);
65static void authtls_verf (AUTH *);
66static bool_t authtls_validate (AUTH *, uint32_t, struct opaque_auth *,
67    struct mbuf **);
68static bool_t authtls_refresh (AUTH *, void *);
69static void authtls_destroy (AUTH *);
70
71static const struct auth_ops authtls_ops = {
72	.ah_nextverf =		authtls_verf,
73	.ah_marshal =		authtls_marshal,
74	.ah_validate =		authtls_validate,
75	.ah_refresh =		authtls_refresh,
76	.ah_destroy =		authtls_destroy,
77};
78
79struct authtls_private {
80	AUTH	no_client;
81	char	mclient[MAX_MARSHAL_SIZE];
82	u_int	mcnt;
83};
84
85static struct authtls_private authtls_private;
86static struct opaque_auth _tls_null_auth;
87
88static void
89authtls_init(void *dummy)
90{
91	struct authtls_private *ap = &authtls_private;
92	XDR xdrs;
93
94	_tls_null_auth.oa_flavor = AUTH_TLS;
95	_tls_null_auth.oa_base = NULL;
96	_tls_null_auth.oa_length = 0;
97	ap->no_client.ah_cred = _tls_null_auth;
98	ap->no_client.ah_verf = _null_auth;
99	ap->no_client.ah_ops = &authtls_ops;
100	xdrmem_create(&xdrs, ap->mclient, MAX_MARSHAL_SIZE, XDR_ENCODE);
101	xdr_opaque_auth(&xdrs, &ap->no_client.ah_cred);
102	xdr_opaque_auth(&xdrs, &ap->no_client.ah_verf);
103	ap->mcnt = XDR_GETPOS(&xdrs);
104	XDR_DESTROY(&xdrs);
105}
106SYSINIT(authtls_init, SI_SUB_KMEM, SI_ORDER_ANY, authtls_init, NULL);
107
108AUTH *
109authtls_create(void)
110{
111	struct authtls_private *ap = &authtls_private;
112
113	return (&ap->no_client);
114}
115
116/*ARGSUSED*/
117static bool_t
118authtls_marshal(AUTH *client, uint32_t xid, XDR *xdrs, struct mbuf *args)
119{
120	struct authtls_private *ap = &authtls_private;
121
122	KASSERT(xdrs != NULL, ("authtls_marshal: xdrs is null"));
123
124	if (!XDR_PUTBYTES(xdrs, ap->mclient, ap->mcnt))
125		return (FALSE);
126
127	xdrmbuf_append(xdrs, args);
128
129	return (TRUE);
130}
131
132/* All these unused parameters are required to keep ANSI-C from grumbling */
133/*ARGSUSED*/
134static void
135authtls_verf(AUTH *client)
136{
137}
138
139/*ARGSUSED*/
140static bool_t
141authtls_validate(AUTH *client, uint32_t xid, struct opaque_auth *opaque,
142    struct mbuf **mrepp)
143{
144	size_t strsiz;
145
146	strsiz = strlen(RPCTLS_START_STRING);
147	/* The verifier must be the string RPCTLS_START_STRING. */
148	if (opaque != NULL &&
149	    (opaque->oa_length != strsiz || memcmp(opaque->oa_base,
150	     RPCTLS_START_STRING, strsiz) != 0))
151		return (FALSE);
152	return (TRUE);
153}
154
155/*ARGSUSED*/
156static bool_t
157authtls_refresh(AUTH *client, void *dummy)
158{
159
160	return (FALSE);
161}
162
163/*ARGSUSED*/
164static void
165authtls_destroy(AUTH *client)
166{
167}
168