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