1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25#include <stdlib.h>
26#include <strings.h>
27#include <rpc/xdr.h>
28#include <errno.h>
29#include <syslog.h>
30#include <smbsrv/libsmb.h>
31#include <smbsrv/smb_xdr.h>
32#include <smbsrv/smb_door.h>
33
34
35/*
36 * Generic XDR encoder.
37 *
38 * Returns a malloc'd, encoded buffer upon success.
39 * Otherwise, returns NULL.
40 */
41char *
42smb_common_encode(void *data, xdrproc_t proc, size_t *rsize)
43{
44	XDR	xdrs;
45	char	*buf;
46	size_t	len;
47
48	if (proc == NULL || data == NULL || rsize == NULL) {
49		syslog(LOG_ERR, "smb_common_encode: invalid parameter");
50		return (NULL);
51	}
52
53	len = xdr_sizeof(proc, data);
54
55	if ((buf = malloc(len)) == NULL) {
56		syslog(LOG_ERR, "smb_common_encode: %m");
57		*rsize = 0;
58		return (NULL);
59	}
60
61	xdrmem_create(&xdrs, buf, len, XDR_ENCODE);
62	*rsize = len;
63
64	if (!proc(&xdrs, data)) {
65		syslog(LOG_DEBUG, "smb_common_encode: encode error");
66		free(buf);
67		buf = NULL;
68		*rsize = 0;
69	}
70
71	xdr_destroy(&xdrs);
72	return (buf);
73}
74
75/*
76 * Generic XDR decoder.  Ensure that data is non-null and bzero'd.
77 */
78int
79smb_common_decode(char *buf, size_t len, xdrproc_t proc, void *data)
80{
81	XDR xdrs;
82	int rc = 0;
83
84	if (data == NULL)
85		return (-1);
86
87	xdrmem_create(&xdrs, buf, len, XDR_DECODE);
88	if (!proc(&xdrs, data))
89		rc = -1;
90
91	xdr_destroy(&xdrs);
92	return (rc);
93}
94
95char *
96smb_string_encode(char *s, size_t *rsize)
97{
98	smb_string_t	obj;
99	XDR		xdrs;
100	char		*buf = NULL;
101	size_t		len;
102
103	if ((obj.buf = s) == NULL) {
104		syslog(LOG_DEBUG, "smb_string_encode: invalid param");
105		goto smb_string_encode_failed;
106	}
107
108	len = xdr_sizeof(smb_string_xdr, &obj);
109	if ((buf = calloc(len, 1)) == NULL) {
110		syslog(LOG_DEBUG, "smb_string_encode: %m");
111		goto smb_string_encode_failed;
112	}
113
114	xdrmem_create(&xdrs, buf, len, XDR_ENCODE);
115
116	if (!smb_string_xdr(&xdrs, &obj)) {
117		syslog(LOG_DEBUG, "smb_string_encode: encode failed");
118		xdr_destroy(&xdrs);
119		free(buf);
120		goto smb_string_encode_failed;
121	}
122
123	xdr_destroy(&xdrs);
124	if (rsize)
125		*rsize = len;
126	return (buf);
127
128smb_string_encode_failed:
129	if (rsize)
130		*rsize = 0;
131	return (NULL);
132}
133
134int
135smb_string_decode(smb_string_t *obj, char *buf, size_t buflen)
136{
137	XDR xdrs;
138	int rc = 0;
139
140	xdrmem_create(&xdrs, (const caddr_t)buf, buflen, XDR_DECODE);
141
142	bzero(obj, sizeof (smb_string_t));
143	if (!smb_string_xdr(&xdrs, obj))
144		rc = -1;
145
146	xdr_destroy(&xdrs);
147	return (rc);
148}
149
150/*
151 * Encode an lsa_account_t into a buffer.
152 */
153int
154lsa_account_encode(lsa_account_t *acct, uint8_t *buf, uint32_t buflen)
155{
156	XDR xdrs;
157	int rc = 0;
158
159	xdrmem_create(&xdrs, (const caddr_t)buf, buflen, XDR_ENCODE);
160
161	if (!lsa_account_xdr(&xdrs, acct))
162		rc = -1;
163
164	xdr_destroy(&xdrs);
165	return (rc);
166}
167
168/*
169 * Decode an XDR buffer into an lsa_account_t.
170 */
171int
172lsa_account_decode(lsa_account_t *acct, uint8_t *buf, uint32_t buflen)
173{
174	XDR xdrs;
175	int rc = 0;
176
177	xdrmem_create(&xdrs, (const caddr_t)buf, buflen, XDR_DECODE);
178
179	bzero(acct, sizeof (lsa_account_t));
180	if (!lsa_account_xdr(&xdrs, acct))
181		rc = -1;
182
183	xdr_destroy(&xdrs);
184	return (rc);
185}
186
187bool_t
188lsa_account_xdr(XDR *xdrs, lsa_account_t *objp)
189{
190	if (!xdr_uint16_t(xdrs, &objp->a_sidtype))
191		return (FALSE);
192	if (!xdr_uint32_t(xdrs, &objp->a_status))
193		return (FALSE);
194	if (!xdr_vector(xdrs, (char *)objp->a_domain, MAXNAMELEN,
195	    sizeof (char), (xdrproc_t)xdr_char))
196		return (FALSE);
197	if (!xdr_vector(xdrs, (char *)objp->a_name, MAXNAMELEN,
198	    sizeof (char), (xdrproc_t)xdr_char))
199		return (FALSE);
200	if (!xdr_vector(xdrs, (char *)objp->a_sid, SMB_SID_STRSZ,
201	    sizeof (char), (xdrproc_t)xdr_char))
202		return (FALSE);
203	return (TRUE);
204}
205