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 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * NT Token library (kernel/user)
28 */
29
30 #ifdef _KERNEL
31 #include <sys/types.h>
32 #include <sys/cmn_err.h>
33 #include <sys/kmem.h>
34 #else /* _KERNEL */
35 #include <stdlib.h>
36 #include <strings.h>
37 #include <syslog.h>
38 #endif /* _KERNEL */
39
40 #include <smbsrv/string.h>
41 #include <smbsrv/smb_token.h>
42 #include <smbsrv/smb_xdr.h>
43
44 /*
45 * smb_token_query_privilege
46 *
47 * Find out if the specified privilege is enable in the given
48 * access token.
49 */
50 int
smb_token_query_privilege(smb_token_t * token,int priv_id)51 smb_token_query_privilege(smb_token_t *token, int priv_id)
52 {
53 smb_privset_t *privset;
54 int i;
55
56 if ((token == NULL) || (token->tkn_privileges == NULL))
57 return (0);
58
59 privset = token->tkn_privileges;
60 for (i = 0; privset->priv_cnt; i++) {
61 if (privset->priv[i].luid.lo_part == priv_id) {
62 if (privset->priv[i].attrs == SE_PRIVILEGE_ENABLED)
63 return (1);
64 else
65 return (0);
66 }
67 }
68
69 return (0);
70 }
71
72 /*
73 * Basic sanity check on a token.
74 */
75 boolean_t
smb_token_valid(smb_token_t * token)76 smb_token_valid(smb_token_t *token)
77 {
78 if (token == NULL)
79 return (B_FALSE);
80
81 if ((token->tkn_user.i_sid == NULL) ||
82 (token->tkn_owner.i_sid == NULL) ||
83 (token->tkn_primary_grp.i_sid == NULL) ||
84 (token->tkn_account_name == NULL) ||
85 (token->tkn_domain_name == NULL) ||
86 (token->tkn_posix_grps == NULL))
87 return (B_FALSE);
88
89 if ((token->tkn_win_grps.i_cnt != 0) &&
90 (token->tkn_win_grps.i_ids == NULL))
91 return (B_FALSE);
92
93 return (B_TRUE);
94 }
95
96 #ifndef _KERNEL
97 /*
98 * Encode: structure -> flat buffer (buffer size)
99 * Pre-condition: obj is non-null.
100 */
101 uint8_t *
smb_token_encode(smb_token_t * obj,uint32_t * len)102 smb_token_encode(smb_token_t *obj, uint32_t *len)
103 {
104 uint8_t *buf;
105 XDR xdrs;
106
107 if (!obj) {
108 syslog(LOG_ERR, "smb_token_encode: invalid parameter");
109 return (NULL);
110 }
111
112 *len = xdr_sizeof(smb_token_xdr, obj);
113 buf = (uint8_t *)malloc(*len);
114 if (!buf) {
115 syslog(LOG_ERR, "smb_token_encode: %m");
116 return (NULL);
117 }
118
119 xdrmem_create(&xdrs, (const caddr_t)buf, *len, XDR_ENCODE);
120
121 if (!smb_token_xdr(&xdrs, obj)) {
122 syslog(LOG_ERR, "smb_token_encode: XDR encode error");
123 *len = 0;
124 free(buf);
125 buf = NULL;
126 }
127
128 xdr_destroy(&xdrs);
129 return (buf);
130 }
131
132 /*
133 * Decode: flat buffer -> structure
134 */
135 smb_logon_t *
smb_logon_decode(uint8_t * buf,uint32_t len)136 smb_logon_decode(uint8_t *buf, uint32_t len)
137 {
138 smb_logon_t *obj;
139 XDR xdrs;
140
141 xdrmem_create(&xdrs, (const caddr_t)buf, len, XDR_DECODE);
142
143 if ((obj = malloc(sizeof (smb_logon_t))) == NULL) {
144 syslog(LOG_ERR, "smb_logon_decode: %m");
145 xdr_destroy(&xdrs);
146 return (NULL);
147 }
148
149 bzero(obj, sizeof (smb_logon_t));
150 if (!smb_logon_xdr(&xdrs, obj)) {
151 syslog(LOG_ERR, "smb_logon_decode: XDR decode error");
152 free(obj);
153 obj = NULL;
154 }
155
156 xdr_destroy(&xdrs);
157 return (obj);
158 }
159
160 void
smb_logon_free(smb_logon_t * obj)161 smb_logon_free(smb_logon_t *obj)
162 {
163 xdr_free(smb_logon_xdr, (char *)obj);
164 free(obj);
165 }
166 #else /* _KERNEL */
167 /*
168 * Tokens are allocated in the kernel via XDR.
169 * Call xdr_free before freeing the token structure.
170 */
171 void
smb_token_free(smb_token_t * token)172 smb_token_free(smb_token_t *token)
173 {
174 if (token != NULL) {
175 xdr_free(smb_token_xdr, (char *)token);
176 kmem_free(token, sizeof (smb_token_t));
177 }
178 }
179 #endif /* _KERNEL */
180