source: branches/samba-3.3.x/source/libads/cldap.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 16 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 7.4 KB
RevLine 
[206]1/*
2 Samba Unix/Linux SMB client library
3 net ads cldap functions
4 Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
5 Copyright (C) 2003 Jim McDonough (jmcd@us.ibm.com)
6 Copyright (C) 2008 Guenther Deschner (gd@samba.org)
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23
24/*
25 do a cldap netlogon query
26*/
27static int send_cldap_netlogon(int sock, const char *domain,
28 const char *hostname, unsigned ntversion)
29{
30 ASN1_DATA data;
31 char ntver[4];
32#ifdef CLDAP_USER_QUERY
33 char aac[4];
34
35 SIVAL(aac, 0, 0x00000180);
36#endif
37 SIVAL(ntver, 0, ntversion);
38
39 memset(&data, 0, sizeof(data));
40
41 asn1_push_tag(&data,ASN1_SEQUENCE(0));
42 asn1_write_Integer(&data, 4);
43 asn1_push_tag(&data, ASN1_APPLICATION(3));
44 asn1_write_OctetString(&data, NULL, 0);
45 asn1_write_enumerated(&data, 0);
46 asn1_write_enumerated(&data, 0);
47 asn1_write_Integer(&data, 0);
48 asn1_write_Integer(&data, 0);
49 asn1_write_BOOLEAN2(&data, False);
50 asn1_push_tag(&data, ASN1_CONTEXT(0));
51
52 if (domain) {
53 asn1_push_tag(&data, ASN1_CONTEXT(3));
54 asn1_write_OctetString(&data, "DnsDomain", 9);
55 asn1_write_OctetString(&data, domain, strlen(domain));
56 asn1_pop_tag(&data);
57 }
58
59 asn1_push_tag(&data, ASN1_CONTEXT(3));
60 asn1_write_OctetString(&data, "Host", 4);
61 asn1_write_OctetString(&data, hostname, strlen(hostname));
62 asn1_pop_tag(&data);
63
64#ifdef CLDAP_USER_QUERY
65 asn1_push_tag(&data, ASN1_CONTEXT(3));
66 asn1_write_OctetString(&data, "User", 4);
67 asn1_write_OctetString(&data, "SAMBA$", 6);
68 asn1_pop_tag(&data);
69
70 asn1_push_tag(&data, ASN1_CONTEXT(3));
71 asn1_write_OctetString(&data, "AAC", 4);
72 asn1_write_OctetString(&data, aac, 4);
73 asn1_pop_tag(&data);
74#endif
75
76 asn1_push_tag(&data, ASN1_CONTEXT(3));
77 asn1_write_OctetString(&data, "NtVer", 5);
78 asn1_write_OctetString(&data, ntver, 4);
79 asn1_pop_tag(&data);
80
81 asn1_pop_tag(&data);
82
83 asn1_push_tag(&data,ASN1_SEQUENCE(0));
84 asn1_write_OctetString(&data, "NetLogon", 8);
85 asn1_pop_tag(&data);
86 asn1_pop_tag(&data);
87 asn1_pop_tag(&data);
88
89 if (data.has_error) {
90 DEBUG(2,("Failed to build cldap netlogon at offset %d\n", (int)data.ofs));
91 asn1_free(&data);
92 return -1;
93 }
94
95 if (write(sock, data.data, data.length) != (ssize_t)data.length) {
96 DEBUG(2,("failed to send cldap query (%s)\n", strerror(errno)));
97 asn1_free(&data);
98 return -1;
99 }
100
101 asn1_free(&data);
102
103 return 0;
104}
105
106static SIG_ATOMIC_T gotalarm;
107
108/***************************************************************
109 Signal function to tell us we timed out.
110****************************************************************/
111
112static void gotalarm_sig(void)
113{
114 gotalarm = 1;
115}
116
117/*
118 receive a cldap netlogon reply
119*/
120static int recv_cldap_netlogon(TALLOC_CTX *mem_ctx,
121 int sock,
122 uint32_t nt_version,
123 struct netlogon_samlogon_response **reply)
124{
125 int ret;
126 ASN1_DATA data;
127 DATA_BLOB blob = data_blob_null;
128 DATA_BLOB os1 = data_blob_null;
129 DATA_BLOB os2 = data_blob_null;
130 DATA_BLOB os3 = data_blob_null;
131 int i1;
132 /* half the time of a regular ldap timeout, not less than 3 seconds. */
133 unsigned int al_secs = MAX(3,lp_ldap_timeout()/2);
134 struct netlogon_samlogon_response *r = NULL;
135 NTSTATUS status;
136
137 blob = data_blob(NULL, 8192);
138 if (blob.data == NULL) {
139 DEBUG(1, ("data_blob failed\n"));
140 errno = ENOMEM;
141 return -1;
142 }
143
144 /* Setup timeout */
145 gotalarm = 0;
146 CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
147 alarm(al_secs);
148 /* End setup timeout. */
149
150 ret = read(sock, blob.data, blob.length);
151
152 /* Teardown timeout. */
153 CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
154 alarm(0);
155
156 if (ret <= 0) {
157 DEBUG(1,("no reply received to cldap netlogon\n"));
158 data_blob_free(&blob);
159 return -1;
160 }
161 blob.length = ret;
162
163 asn1_load(&data, blob);
164 asn1_start_tag(&data, ASN1_SEQUENCE(0));
165 asn1_read_Integer(&data, &i1);
166 asn1_start_tag(&data, ASN1_APPLICATION(4));
167 asn1_read_OctetString(&data, &os1);
168 asn1_start_tag(&data, ASN1_SEQUENCE(0));
169 asn1_start_tag(&data, ASN1_SEQUENCE(0));
170 asn1_read_OctetString(&data, &os2);
171 asn1_start_tag(&data, ASN1_SET);
172 asn1_read_OctetString(&data, &os3);
173 asn1_end_tag(&data);
174 asn1_end_tag(&data);
175 asn1_end_tag(&data);
176 asn1_end_tag(&data);
177 asn1_end_tag(&data);
178
179 if (data.has_error) {
180 data_blob_free(&blob);
181 data_blob_free(&os1);
182 data_blob_free(&os2);
183 data_blob_free(&os3);
184 asn1_free(&data);
185 DEBUG(1,("Failed to parse cldap reply\n"));
186 return -1;
187 }
188
189 r = TALLOC_ZERO_P(mem_ctx, struct netlogon_samlogon_response);
190 if (!r) {
191 errno = ENOMEM;
192 data_blob_free(&os1);
193 data_blob_free(&os2);
194 data_blob_free(&os3);
195 data_blob_free(&blob);
196 return -1;
197 }
198
199 status = pull_netlogon_samlogon_response(&os3, mem_ctx, r);
200 if (!NT_STATUS_IS_OK(status)) {
201 data_blob_free(&os1);
202 data_blob_free(&os2);
203 data_blob_free(&os3);
204 data_blob_free(&blob);
205 TALLOC_FREE(r);
206 return -1;
207 }
208
209 map_netlogon_samlogon_response(r);
210
211 data_blob_free(&os1);
212 data_blob_free(&os2);
213 data_blob_free(&os3);
214 data_blob_free(&blob);
215
216 asn1_free(&data);
217
218 if (reply) {
219 *reply = r;
220 } else {
221 TALLOC_FREE(r);
222 }
223
224 return 0;
225}
226
227/*******************************************************************
228 do a cldap netlogon query. Always 389/udp
229*******************************************************************/
230
231bool ads_cldap_netlogon(TALLOC_CTX *mem_ctx,
232 const char *server,
233 const char *realm,
234 uint32_t nt_version,
235 struct netlogon_samlogon_response **reply)
236{
237 int sock;
238 int ret;
239
240 sock = open_udp_socket(server, LDAP_PORT );
241 if (sock == -1) {
242 DEBUG(2,("ads_cldap_netlogon: Failed to open udp socket to %s\n",
243 server));
244 return False;
245 }
246
247 ret = send_cldap_netlogon(sock, realm, global_myname(), nt_version);
248 if (ret != 0) {
249 close(sock);
250 return False;
251 }
252 ret = recv_cldap_netlogon(mem_ctx, sock, nt_version, reply);
253 close(sock);
254
255 if (ret == -1) {
256 return False;
257 }
258
259 return True;
260}
261
262/*******************************************************************
263 do a cldap netlogon query. Always 389/udp
264*******************************************************************/
265
266bool ads_cldap_netlogon_5(TALLOC_CTX *mem_ctx,
267 const char *server,
268 const char *realm,
269 struct NETLOGON_SAM_LOGON_RESPONSE_EX *reply5)
270{
271 uint32_t nt_version = NETLOGON_NT_VERSION_5 | NETLOGON_NT_VERSION_5EX;
272 struct netlogon_samlogon_response *reply = NULL;
273 bool ret;
274
275 ret = ads_cldap_netlogon(mem_ctx, server, realm, nt_version, &reply);
276 if (!ret) {
277 return false;
278 }
279
280 if (reply->ntver != NETLOGON_NT_VERSION_5EX) {
281 DEBUG(0,("ads_cldap_netlogon_5: nt_version mismatch: 0x%08x\n",
282 reply->ntver));
283 return false;
284 }
285
286 *reply5 = reply->data.nt5_ex;
287
288 return true;
289}
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