summaryrefslogtreecommitdiff
path: root/source4/libnet/libnet_rpc.c
blob: 5b63f482df1d29ba1a42c7db4ec0580e873d79e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
/* 
   Unix SMB/CIFS implementation.
   
   Copyright (C) Stefan Metzmacher  2004
   Copyright (C) Rafal Szczesniak   2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "libnet/libnet.h"
#include "libcli/libcli.h"

/**
 * Connects rpc pipe on remote server
 * 
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of this call
 * @param r data structure containing necessary parameters and return values
 * @return nt status of the call
 **/

static NTSTATUS libnet_RpcConnectSrv(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_RpcConnect *r)
{
	NTSTATUS status;
	const char *binding = NULL;

	/* prepare binding string */
	switch (r->level) {
	case LIBNET_RPC_CONNECT_DC:
	case LIBNET_RPC_CONNECT_PDC:
	case LIBNET_RPC_CONNECT_SERVER:
		binding = talloc_asprintf(mem_ctx, "ncacn_np:%s", r->in.name);
		break;

	case LIBNET_RPC_CONNECT_BINDING:
		binding = r->in.binding;
		break;
	}

	/* connect to remote dcerpc pipe */
	status = dcerpc_pipe_connect(mem_ctx, &r->out.dcerpc_pipe,
				     binding, r->in.dcerpc_iface,
				     ctx->cred, ctx->event_ctx);

	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						      "dcerpc_pipe_connect to pipe %s[%s] failed with %s\n",
						      r->in.dcerpc_iface->name, binding, nt_errstr(status));
		return status;
	}

	r->out.error_string = NULL;
	ctx->pipe = r->out.dcerpc_pipe;

	return status;
}


/**
 * Connects rpc pipe on domain pdc
 * 
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of this call
 * @param r data structure containing necessary parameters and return values
 * @return nt status of the call
 **/

static NTSTATUS libnet_RpcConnectDC(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_RpcConnect *r)
{
	NTSTATUS status;
	struct libnet_RpcConnect r2;
	struct libnet_LookupDCs f;
	const char *connect_name;

	f.in.domain_name  = r->in.name;
	switch (r->level) {
	case LIBNET_RPC_CONNECT_PDC:
		f.in.name_type = NBT_NAME_PDC;
		break;
	case LIBNET_RPC_CONNECT_DC:
		f.in.name_type = NBT_NAME_LOGON;
		break;
	default:
		break;
	}
	f.out.num_dcs = 0;
	f.out.dcs  = NULL;

	/* find the domain pdc first */
	status = libnet_LookupDCs(ctx, mem_ctx, &f);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx, "libnet_LookupDCs failed: %s",
						      nt_errstr(status));
		return status;
	}

	/* we might not have got back a name.  Fall back to the IP */
	if (f.out.dcs[0].name) {
		connect_name = f.out.dcs[0].name;
	} else {
		connect_name = f.out.dcs[0].address;
	}

	/* ok, pdc has been found so do attempt to rpc connect */
	r2.level	    = LIBNET_RPC_CONNECT_SERVER;

	/* This will cause yet another name resolution, but at least
	 * we pass the right name down the stack now */
	r2.in.name	    = talloc_strdup(mem_ctx, connect_name);
	r2.in.dcerpc_iface  = r->in.dcerpc_iface;
	
	status = libnet_RpcConnect(ctx, mem_ctx, &r2);

	r->out.dcerpc_pipe          = r2.out.dcerpc_pipe;
	r->out.error_string	    = r2.out.error_string;

	ctx->pipe = r->out.dcerpc_pipe;

	return status;
}


/**
 * Connects to rpc pipe on remote server or pdc
 * 
 * @param ctx initialised libnet context
 * @param mem_ctx memory context of this call
 * @param r data structure containing necessary parameters and return values
 * @return nt status of the call
 **/

NTSTATUS libnet_RpcConnect(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_RpcConnect *r)
{
	switch (r->level) {
		case LIBNET_RPC_CONNECT_SERVER:
			return libnet_RpcConnectSrv(ctx, mem_ctx, r);

		case LIBNET_RPC_CONNECT_BINDING:
			return libnet_RpcConnectSrv(ctx, mem_ctx, r);

		case LIBNET_RPC_CONNECT_PDC:
		case LIBNET_RPC_CONNECT_DC:
			return libnet_RpcConnectDC(ctx, mem_ctx, r);
	}

	return NT_STATUS_INVALID_LEVEL;
}

/**
 * Connects to rpc pipe on remote server or pdc, and returns info on the domain name, domain sid and realm
 * 
 * @param ctx initialised libnet context
 * @param r data structure containing necessary parameters and return values.  Must be a talloc context
 * @return nt status of the call
 **/

NTSTATUS libnet_RpcConnectDCInfo(struct libnet_context *ctx, 
				 struct libnet_RpcConnectDCInfo *r)
{
	TALLOC_CTX *tmp_ctx;
	NTSTATUS status;

	struct libnet_RpcConnect *c;
	struct lsa_ObjectAttribute attr;
	struct lsa_QosInfo qos;
	struct lsa_OpenPolicy2 lsa_open_policy;
	struct policy_handle lsa_p_handle;
	struct lsa_QueryInfoPolicy2 lsa_query_info2;
	struct lsa_QueryInfoPolicy lsa_query_info;

	struct dcerpc_pipe *lsa_pipe;

	struct dcerpc_binding *final_binding;
	struct dcerpc_pipe *final_pipe;

	tmp_ctx = talloc_new(r);
	if (!tmp_ctx) {
		r->out.error_string = NULL;
		return NT_STATUS_NO_MEMORY;
	}
	
	c = talloc(tmp_ctx, struct libnet_RpcConnect);
	if (!c) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}
	c->level              = r->level;

	if (r->level != LIBNET_RPC_CONNECT_BINDING) {
		c->in.name    = r->in.name;
	} else {
		c->in.binding = r->in.binding;
	}
	
	c->in.dcerpc_iface    = &dcerpc_table_lsarpc;
	
	/* connect to the LSA pipe of the PDC */

	status = libnet_RpcConnect(ctx, c, c);
	if (!NT_STATUS_IS_OK(status)) {
		if (r->level != LIBNET_RPC_CONNECT_BINDING) {
			r->out.error_string = talloc_asprintf(r,
							      "Connection to LSA pipe of DC failed: %s",
							      c->out.error_string);
		} else {
			r->out.error_string = talloc_asprintf(r,
							      "Connection to LSA pipe with binding '%s' failed: %s",
							      r->in.binding, c->out.error_string);
		}
		talloc_free(tmp_ctx);
		return status;
	}			
	lsa_pipe = c->out.dcerpc_pipe;
	
	/* Get an LSA policy handle */

	ZERO_STRUCT(lsa_p_handle);
	qos.len = 0;
	qos.impersonation_level = 2;
	qos.context_mode = 1;
	qos.effective_only = 0;

	attr.len = 0;
	attr.root_dir = NULL;
	attr.object_name = NULL;
	attr.attributes = 0;
	attr.sec_desc = NULL;
	attr.sec_qos = &qos;

	lsa_open_policy.in.attr = &attr;
	
	lsa_open_policy.in.system_name = talloc_asprintf(tmp_ctx, "\\"); 
	if (!lsa_open_policy.in.system_name) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	lsa_open_policy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
	lsa_open_policy.out.handle = &lsa_p_handle;

	status = dcerpc_lsa_OpenPolicy2(lsa_pipe, tmp_ctx, &lsa_open_policy); 

	/* This now fails on ncacn_ip_tcp against Win2k3 SP1 */
	if (NT_STATUS_IS_OK(status)) {
		/* Look to see if this is ADS (a fault indicates NT4 or Samba 3.0) */
		
		lsa_query_info2.in.handle = &lsa_p_handle;
		lsa_query_info2.in.level = LSA_POLICY_INFO_DNS;
		
		status = dcerpc_lsa_QueryInfoPolicy2(lsa_pipe, tmp_ctx, 		
						     &lsa_query_info2);
		
		if (!NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
			if (!NT_STATUS_IS_OK(status)) {
				r->out.error_string = talloc_asprintf(r,
								      "lsa_QueryInfoPolicy2 failed: %s",
								      nt_errstr(status));
				talloc_free(tmp_ctx);
				return status;
			}
			r->out.realm = lsa_query_info2.out.info->dns.dns_domain.string;
			r->out.guid = talloc(r, struct GUID);
			if (!r->out.guid) {
				r->out.error_string = NULL;
				return NT_STATUS_NO_MEMORY;
			}
			*r->out.guid = lsa_query_info2.out.info->dns.domain_guid;
		} else {
			r->out.realm = NULL;
			r->out.guid = NULL;
		}
		
		/* Grab the domain SID (regardless of the result of the previous call */
		
		lsa_query_info.in.handle = &lsa_p_handle;
		lsa_query_info.in.level = LSA_POLICY_INFO_DOMAIN;
		
		status = dcerpc_lsa_QueryInfoPolicy(lsa_pipe, tmp_ctx, 
						    &lsa_query_info);
		
		if (!NT_STATUS_IS_OK(status)) {
			r->out.error_string = talloc_asprintf(r,
							      "lsa_QueryInfoPolicy2 failed: %s",
							      nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
		
		r->out.domain_sid = lsa_query_info.out.info->domain.sid;
		r->out.domain_name = lsa_query_info.out.info->domain.name.string;
	} else {
		/* Cause the code further down to try this with just SAMR */
		r->out.domain_sid = NULL;
		r->out.domain_name = NULL;
		r->out.realm = NULL;
	}

	/* Find the original binding string */
	final_binding = talloc(tmp_ctx, struct dcerpc_binding);
	if (!final_binding) {
		return NT_STATUS_NO_MEMORY;
	}
	*final_binding = *lsa_pipe->binding;
	/* Ensure we keep hold of the member elements */
	talloc_reference(final_binding, lsa_pipe->binding);

	/* Make binding string for samr, not the other pipe */
	status = dcerpc_epm_map_binding(tmp_ctx, final_binding, 					
					r->in.dcerpc_iface,
					lsa_pipe->conn->event_ctx);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(r,
						      "Failed to map pipe with endpoint mapper - %s",
						      nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	/* Now that we have the info setup a final connection to the pipe they wanted */
	status = dcerpc_secondary_connection(lsa_pipe, &final_pipe, final_binding);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(r,
						      "secondary connection failed: %s",
						      nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}
	r->out.dcerpc_pipe = final_pipe;

	talloc_steal(r, r->out.realm);
	talloc_steal(r, r->out.domain_sid);
	talloc_steal(r, r->out.domain_name);
	talloc_steal(r, r->out.dcerpc_pipe);

	/* This should close the LSA pipe, which we don't need now we have the info */
	talloc_free(tmp_ctx);
	return NT_STATUS_OK;
}