Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : dcerpc connect functions
5 :
6 : Copyright (C) Andrew Tridgell 2003
7 : Copyright (C) Jelmer Vernooij 2004
8 : Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
9 : Copyright (C) Rafal Szczesniak 2005
10 :
11 : This program is free software; you can redistribute it and/or modify
12 : it under the terms of the GNU General Public License as published by
13 : the Free Software Foundation; either version 3 of the License, or
14 : (at your option) any later version.
15 :
16 : This program is distributed in the hope that it will be useful,
17 : but WITHOUT ANY WARRANTY; without even the implied warranty of
18 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 : GNU General Public License for more details.
20 :
21 : You should have received a copy of the GNU General Public License
22 : along with this program. If not, see <http://www.gnu.org/licenses/>.
23 : */
24 :
25 :
26 : #include "includes.h"
27 : #include "libcli/composite/composite.h"
28 : #include "lib/events/events.h"
29 : #include "librpc/rpc/dcerpc.h"
30 : #include "librpc/rpc/dcerpc_proto.h"
31 : #include "auth/credentials/credentials.h"
32 : #include "param/param.h"
33 : #include "libcli/resolve/resolve.h"
34 : #include "lib/util/util_net.h"
35 :
36 : struct sec_conn_state {
37 : struct dcerpc_pipe *pipe;
38 : struct dcerpc_pipe *pipe2;
39 : struct dcerpc_binding *binding;
40 : };
41 :
42 :
43 : static void continue_open_smb(struct composite_context *ctx);
44 : static void continue_open_tcp(struct composite_context *ctx);
45 : static void continue_open_ncalrpc(struct composite_context *ctx);
46 : static void continue_open_ncacn_unix(struct composite_context *ctx);
47 : static void continue_pipe_open(struct composite_context *c);
48 :
49 :
50 : /*
51 : Send request to create a secondary dcerpc connection from a primary
52 : connection
53 : */
54 1640 : _PUBLIC_ struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p,
55 : const struct dcerpc_binding *b)
56 : {
57 230 : struct composite_context *c;
58 230 : struct sec_conn_state *s;
59 230 : struct composite_context *pipe_smb_req;
60 230 : struct composite_context *pipe_tcp_req;
61 1640 : const char *localaddress = NULL;
62 230 : struct composite_context *pipe_ncalrpc_req;
63 1640 : const char *ncalrpc_dir = NULL;
64 230 : struct composite_context *pipe_unix_req;
65 230 : const char *host;
66 230 : const char *target_hostname;
67 230 : const char *endpoint;
68 :
69 : /* composite context allocation and setup */
70 1640 : c = composite_create(p, p->conn->event_ctx);
71 1640 : if (c == NULL) return NULL;
72 :
73 1640 : s = talloc_zero(c, struct sec_conn_state);
74 1640 : if (composite_nomem(s, c)) return c;
75 1640 : c->private_data = s;
76 :
77 1640 : s->pipe = p;
78 1640 : s->binding = dcerpc_binding_dup(s, b);
79 1640 : if (composite_nomem(s->binding, c)) return c;
80 :
81 : /* initialise second dcerpc pipe based on primary pipe's event context */
82 1640 : s->pipe2 = dcerpc_pipe_init(c, s->pipe->conn->event_ctx);
83 1640 : if (composite_nomem(s->pipe2, c)) return c;
84 :
85 1640 : if (DEBUGLEVEL >= 10)
86 0 : s->pipe2->conn->packet_log_dir = s->pipe->conn->packet_log_dir;
87 :
88 1640 : host = dcerpc_binding_get_string_option(s->binding, "host");
89 1640 : if (host == NULL) {
90 : /*
91 : * We may fallback to the host of the given connection
92 : */
93 8 : host = dcerpc_binding_get_string_option(s->pipe->binding,
94 : "host");
95 : }
96 1640 : target_hostname = dcerpc_binding_get_string_option(s->binding, "target_hostname");
97 1640 : if (target_hostname == NULL) {
98 : /*
99 : * We may fallback to the target_hostname of the given connection
100 : */
101 8 : target_hostname = dcerpc_binding_get_string_option(s->pipe->binding,
102 : "target_hostname");
103 : }
104 1640 : endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
105 1640 : if (endpoint == NULL) {
106 : /*
107 : * We may fallback to the endpoint of the given connection
108 : */
109 0 : endpoint = dcerpc_binding_get_string_option(s->pipe->binding, "endpoint");
110 : }
111 1640 : if (endpoint == NULL) {
112 0 : composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
113 0 : return c;
114 : }
115 :
116 : /* open second dcerpc pipe using the same transport as for primary pipe */
117 1640 : switch (s->pipe->conn->transport.transport) {
118 1210 : case NCACN_NP:
119 1440 : pipe_smb_req = dcerpc_secondary_smb_send(s->pipe->conn,
120 1210 : s->pipe2->conn,
121 : endpoint);
122 1210 : composite_continue(c, pipe_smb_req, continue_open_smb, c);
123 1640 : return c;
124 :
125 248 : case NCACN_IP_TCP:
126 248 : if (host == NULL) {
127 0 : composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
128 0 : return c;
129 : }
130 :
131 248 : if (!is_ipaddress(host)) {
132 : /*
133 : * We may fallback to the host of the given connection
134 : */
135 72 : host = dcerpc_binding_get_string_option(s->pipe->binding,
136 : "host");
137 72 : if (host == NULL) {
138 0 : composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
139 0 : return c;
140 : }
141 72 : if (!is_ipaddress(host)) {
142 0 : composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
143 0 : return c;
144 : }
145 : }
146 :
147 248 : localaddress = dcerpc_binding_get_string_option(s->binding,
148 : "localaddress");
149 248 : if (localaddress == NULL) {
150 : /*
151 : * We may fallback to the localaddress of the given connection
152 : */
153 72 : localaddress = dcerpc_binding_get_string_option(s->pipe->binding,
154 : "localaddress");
155 : }
156 :
157 248 : pipe_tcp_req = dcerpc_pipe_open_tcp_send(s->pipe2->conn,
158 : localaddress,
159 : host,
160 : target_hostname,
161 248 : atoi(endpoint),
162 : resolve_context_init(s));
163 248 : composite_continue(c, pipe_tcp_req, continue_open_tcp, c);
164 248 : return c;
165 :
166 182 : case NCALRPC:
167 182 : ncalrpc_dir = dcerpc_binding_get_string_option(s->binding,
168 : "ncalrpc_dir");
169 182 : if (ncalrpc_dir == NULL) {
170 72 : ncalrpc_dir = dcerpc_binding_get_string_option(s->pipe->binding,
171 : "ncalrpc_dir");
172 : }
173 182 : if (ncalrpc_dir == NULL) {
174 0 : composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
175 0 : return c;
176 : }
177 :
178 182 : pipe_ncalrpc_req = dcerpc_pipe_open_pipe_send(s->pipe2->conn,
179 : ncalrpc_dir,
180 : endpoint);
181 182 : composite_continue(c, pipe_ncalrpc_req, continue_open_ncalrpc, c);
182 182 : return c;
183 :
184 0 : case NCACN_UNIX_STREAM:
185 0 : pipe_unix_req = dcerpc_pipe_open_unix_stream_send(s->pipe2->conn,
186 : endpoint);
187 0 : composite_continue(c, pipe_unix_req, continue_open_ncacn_unix, c);
188 0 : return c;
189 :
190 0 : default:
191 : /* looks like a transport we don't support */
192 0 : composite_error(c, NT_STATUS_NOT_SUPPORTED);
193 : }
194 :
195 0 : return c;
196 : }
197 :
198 :
199 : /*
200 : Stage 2 of secondary_connection: Receive result of pipe open request on smb
201 : */
202 1210 : static void continue_open_smb(struct composite_context *ctx)
203 : {
204 1210 : struct composite_context *c = talloc_get_type(ctx->async.private_data,
205 : struct composite_context);
206 :
207 1210 : c->status = dcerpc_secondary_smb_recv(ctx);
208 1210 : if (!composite_is_ok(c)) return;
209 :
210 1210 : continue_pipe_open(c);
211 : }
212 :
213 :
214 : /*
215 : Stage 2 of secondary_connection: Receive result of pipe open request on tcp/ip
216 : */
217 248 : static void continue_open_tcp(struct composite_context *ctx)
218 : {
219 248 : struct composite_context *c = talloc_get_type(ctx->async.private_data,
220 : struct composite_context);
221 248 : struct sec_conn_state *s = talloc_get_type_abort(c->private_data,
222 : struct sec_conn_state);
223 248 : char *localaddr = NULL;
224 248 : char *remoteaddr = NULL;
225 :
226 248 : c->status = dcerpc_pipe_open_tcp_recv(ctx, s, &localaddr, &remoteaddr);
227 248 : if (!composite_is_ok(c)) return;
228 :
229 248 : c->status = dcerpc_binding_set_string_option(s->binding,
230 : "localaddress",
231 : localaddr);
232 248 : if (!composite_is_ok(c)) return;
233 :
234 248 : c->status = dcerpc_binding_set_string_option(s->binding,
235 : "host",
236 : remoteaddr);
237 248 : if (!composite_is_ok(c)) return;
238 :
239 248 : continue_pipe_open(c);
240 : }
241 :
242 : /*
243 : Stage 2 of secondary_connection: Receive result of pipe open request on ncalrpc
244 : */
245 182 : static void continue_open_ncalrpc(struct composite_context *ctx)
246 : {
247 182 : struct composite_context *c = talloc_get_type(ctx->async.private_data,
248 : struct composite_context);
249 :
250 182 : c->status = dcerpc_pipe_open_pipe_recv(ctx);
251 182 : if (!composite_is_ok(c)) return;
252 :
253 182 : continue_pipe_open(c);
254 : }
255 :
256 : /*
257 : Stage 2 of secondary_connection: Receive result of pipe open request on ncacn_unix
258 : */
259 0 : static void continue_open_ncacn_unix(struct composite_context *ctx)
260 : {
261 0 : struct composite_context *c = talloc_get_type(ctx->async.private_data,
262 : struct composite_context);
263 :
264 0 : c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
265 0 : if (!composite_is_ok(c)) return;
266 :
267 0 : continue_pipe_open(c);
268 : }
269 :
270 :
271 : /*
272 : Stage 3 of secondary_connection: Get binding data and flags from primary pipe
273 : and say if we're done ok.
274 : */
275 1640 : static void continue_pipe_open(struct composite_context *c)
276 : {
277 230 : struct sec_conn_state *s;
278 :
279 1640 : s = talloc_get_type(c->private_data, struct sec_conn_state);
280 :
281 1640 : s->pipe2->conn->flags = s->pipe->conn->flags;
282 1640 : s->pipe2->binding = dcerpc_binding_dup(s->pipe2, s->binding);
283 1640 : if (composite_nomem(s->pipe2->binding, c)) {
284 0 : return;
285 : }
286 :
287 1640 : composite_done(c);
288 : }
289 :
290 :
291 : /*
292 : Receive result of secondary rpc connection request and return
293 : second dcerpc pipe.
294 : */
295 1640 : _PUBLIC_ NTSTATUS dcerpc_secondary_connection_recv(struct composite_context *c,
296 : struct dcerpc_pipe **p2)
297 : {
298 1640 : NTSTATUS status = composite_wait(c);
299 230 : struct sec_conn_state *s;
300 :
301 1640 : s = talloc_get_type(c->private_data, struct sec_conn_state);
302 :
303 1640 : if (NT_STATUS_IS_OK(status)) {
304 1640 : *p2 = talloc_steal(s->pipe, s->pipe2);
305 : }
306 :
307 1640 : talloc_free(c);
308 1640 : return status;
309 : }
310 :
311 : /*
312 : Create a secondary DCERPC connection, then bind (and possibly
313 : authenticate) using the supplied credentials.
314 :
315 : This creates a second connection, to the same host (and on ncacn_np on the same connection) as the first
316 : */
317 : struct sec_auth_conn_state {
318 : struct dcerpc_pipe *pipe2;
319 : const struct dcerpc_binding *binding;
320 : const struct ndr_interface_table *table;
321 : struct cli_credentials *credentials;
322 : struct composite_context *ctx;
323 : struct loadparm_context *lp_ctx;
324 : };
325 :
326 : static void dcerpc_secondary_auth_connection_bind(struct composite_context *ctx);
327 : static void dcerpc_secondary_auth_connection_continue(struct composite_context *ctx);
328 :
329 1136 : _PUBLIC_ struct composite_context* dcerpc_secondary_auth_connection_send(struct dcerpc_pipe *p,
330 : const struct dcerpc_binding *binding,
331 : const struct ndr_interface_table *table,
332 : struct cli_credentials *credentials,
333 : struct loadparm_context *lp_ctx)
334 : {
335 :
336 174 : struct composite_context *c, *secondary_conn_ctx;
337 174 : struct sec_auth_conn_state *s;
338 :
339 : /* composite context allocation and setup */
340 1136 : c = composite_create(p, p->conn->event_ctx);
341 1136 : if (c == NULL) return NULL;
342 :
343 1136 : s = talloc_zero(c, struct sec_auth_conn_state);
344 1136 : if (composite_nomem(s, c)) return c;
345 1136 : c->private_data = s;
346 1136 : s->ctx = c;
347 :
348 1136 : s->binding = binding;
349 1136 : s->table = table;
350 1136 : s->credentials = credentials;
351 1136 : s->lp_ctx = lp_ctx;
352 :
353 1136 : secondary_conn_ctx = dcerpc_secondary_connection_send(p, binding);
354 :
355 1136 : if (composite_nomem(secondary_conn_ctx, s->ctx)) {
356 0 : talloc_free(c);
357 0 : return NULL;
358 : }
359 :
360 1136 : composite_continue(s->ctx, secondary_conn_ctx, dcerpc_secondary_auth_connection_bind,
361 : s);
362 1136 : return c;
363 : }
364 :
365 : /*
366 : Stage 2 of secondary_auth_connection:
367 : Having made the secondary connection, we will need to do an (authenticated) bind
368 : */
369 1136 : static void dcerpc_secondary_auth_connection_bind(struct composite_context *ctx)
370 : {
371 174 : struct composite_context *secondary_auth_ctx;
372 1136 : struct sec_auth_conn_state *s = talloc_get_type(ctx->async.private_data,
373 : struct sec_auth_conn_state);
374 :
375 1136 : s->ctx->status = dcerpc_secondary_connection_recv(ctx, &s->pipe2);
376 1136 : if (!composite_is_ok(s->ctx)) return;
377 :
378 1136 : secondary_auth_ctx = dcerpc_pipe_auth_send(s->pipe2, s->binding, s->table, s->credentials,
379 : s->lp_ctx);
380 1136 : composite_continue(s->ctx, secondary_auth_ctx, dcerpc_secondary_auth_connection_continue, s);
381 :
382 : }
383 :
384 : /*
385 : Stage 3 of secondary_auth_connection: Receive result of authenticated bind request
386 : */
387 1136 : static void dcerpc_secondary_auth_connection_continue(struct composite_context *ctx)
388 : {
389 1136 : struct sec_auth_conn_state *s = talloc_get_type(ctx->async.private_data,
390 : struct sec_auth_conn_state);
391 :
392 1136 : s->ctx->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe2);
393 1136 : if (!composite_is_ok(s->ctx)) return;
394 :
395 1127 : composite_done(s->ctx);
396 : }
397 :
398 : /*
399 : Receive an authenticated pipe, created as a secondary connection
400 : */
401 1136 : _PUBLIC_ NTSTATUS dcerpc_secondary_auth_connection_recv(struct composite_context *c,
402 : TALLOC_CTX *mem_ctx,
403 : struct dcerpc_pipe **p)
404 : {
405 1136 : NTSTATUS status = composite_wait(c);
406 174 : struct sec_auth_conn_state *s;
407 :
408 1136 : s = talloc_get_type(c->private_data, struct sec_auth_conn_state);
409 :
410 1136 : if (NT_STATUS_IS_OK(status)) {
411 1127 : *p = talloc_steal(mem_ctx, s->pipe2);
412 : }
413 :
414 1136 : talloc_free(c);
415 1136 : return status;
416 : }
417 :
418 576 : _PUBLIC_ NTSTATUS dcerpc_secondary_auth_connection(struct dcerpc_pipe *p,
419 : const struct dcerpc_binding *binding,
420 : const struct ndr_interface_table *table,
421 : struct cli_credentials *credentials,
422 : struct loadparm_context *lp_ctx,
423 : TALLOC_CTX *mem_ctx,
424 : struct dcerpc_pipe **p2)
425 : {
426 102 : struct composite_context *c;
427 :
428 576 : c = dcerpc_secondary_auth_connection_send(p, binding, table,
429 : credentials, lp_ctx);
430 576 : return dcerpc_secondary_auth_connection_recv(c, mem_ctx, p2);
431 : }
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