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 */
41 char *
smb_common_encode(void * data,xdrproc_t proc,size_t * rsize)42 smb_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 */
78 int
smb_common_decode(char * buf,size_t len,xdrproc_t proc,void * data)79 smb_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
95 char *
smb_string_encode(char * s,size_t * rsize)96 smb_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
128 smb_string_encode_failed:
129 if (rsize)
130 *rsize = 0;
131 return (NULL);
132 }
133
134 int
smb_string_decode(smb_string_t * obj,char * buf,size_t buflen)135 smb_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 */
153 int
lsa_account_encode(lsa_account_t * acct,uint8_t * buf,uint32_t buflen)154 lsa_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 */
171 int
lsa_account_decode(lsa_account_t * acct,uint8_t * buf,uint32_t buflen)172 lsa_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
187 bool_t
lsa_account_xdr(XDR * xdrs,lsa_account_t * objp)188 lsa_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