2 Unix SMB/CIFS implementation.
4 dcerpc ncalrpc as system operations
6 Copyright (C) 2014 Andreas Schneider <asn@samba.org>
7 Copyright (C) 2014 Stefan Metzmacher <metze@samba.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "lib/util/tevent_ntstatus.h"
26 #include "auth/auth.h"
27 #include "auth/gensec/gensec.h"
28 #include "auth/gensec/gensec_internal.h"
29 #include "librpc/gen_ndr/dcerpc.h"
30 #include "lib/param/param.h"
33 _PUBLIC_ NTSTATUS gensec_ncalrpc_as_system_init(void);
35 struct gensec_ncalrpc_state {
43 struct auth_user_info_dc *user_info_dc;
46 static NTSTATUS gensec_ncalrpc_client_start(struct gensec_security *gensec_security)
48 struct gensec_ncalrpc_state *state;
50 state = talloc_zero(gensec_security,
51 struct gensec_ncalrpc_state);
53 return NT_STATUS_NO_MEMORY;
55 gensec_security->private_data = state;
57 state->step = GENSEC_NCALRPC_START;
61 static NTSTATUS gensec_ncalrpc_server_start(struct gensec_security *gensec_security)
63 struct gensec_ncalrpc_state *state;
65 state = talloc_zero(gensec_security,
66 struct gensec_ncalrpc_state);
68 return NT_STATUS_NO_MEMORY;
70 gensec_security->private_data = state;
72 state->step = GENSEC_NCALRPC_START;
76 struct gensec_ncalrpc_update_state {
81 static NTSTATUS gensec_ncalrpc_update_internal(
82 struct gensec_security *gensec_security,
87 static struct tevent_req *gensec_ncalrpc_update_send(TALLOC_CTX *mem_ctx,
88 struct tevent_context *ev,
89 struct gensec_security *gensec_security,
92 struct tevent_req *req;
93 struct gensec_ncalrpc_update_state *state = NULL;
96 req = tevent_req_create(mem_ctx, &state,
97 struct gensec_ncalrpc_update_state);
102 status = gensec_ncalrpc_update_internal(gensec_security,
105 state->status = status;
106 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
107 status = NT_STATUS_OK;
109 if (tevent_req_nterror(req, status)) {
110 return tevent_req_post(req, ev);
113 tevent_req_done(req);
114 return tevent_req_post(req, ev);
117 static NTSTATUS gensec_ncalrpc_update_internal(
118 struct gensec_security *gensec_security,
123 struct gensec_ncalrpc_state *state =
124 talloc_get_type_abort(gensec_security->private_data,
125 struct gensec_ncalrpc_state);
126 DATA_BLOB magic_req = data_blob_string_const("NCALRPC_AUTH_TOKEN");
127 DATA_BLOB magic_ok = data_blob_string_const("NCALRPC_AUTH_OK");
128 DATA_BLOB magic_fail = data_blob_string_const("NCALRPC_AUTH_FAIL");
129 char *unix_path = NULL;
133 *out = data_blob_null;
135 if (state->step >= GENSEC_NCALRPC_DONE) {
136 return NT_STATUS_INVALID_PARAMETER;
139 switch (gensec_security->gensec_role) {
141 switch (state->step) {
142 case GENSEC_NCALRPC_START:
143 *out = data_blob_dup_talloc(mem_ctx, magic_req);
144 if (out->data == NULL) {
145 state->step = GENSEC_NCALRPC_ERROR;
146 return NT_STATUS_NO_MEMORY;
149 state->step = GENSEC_NCALRPC_MORE;
150 return NT_STATUS_MORE_PROCESSING_REQUIRED;
152 case GENSEC_NCALRPC_MORE:
153 cmp = data_blob_cmp(&in, &magic_ok);
155 state->step = GENSEC_NCALRPC_ERROR;
156 return NT_STATUS_LOGON_FAILURE;
159 state->step = GENSEC_NCALRPC_DONE;
162 case GENSEC_NCALRPC_DONE:
163 case GENSEC_NCALRPC_ERROR:
167 state->step = GENSEC_NCALRPC_ERROR;
168 return NT_STATUS_INTERNAL_ERROR;
171 if (state->step != GENSEC_NCALRPC_START) {
172 state->step = GENSEC_NCALRPC_ERROR;
173 return NT_STATUS_INTERNAL_ERROR;
176 cmp = data_blob_cmp(&in, &magic_req);
178 state->step = GENSEC_NCALRPC_ERROR;
179 *out = data_blob_dup_talloc(mem_ctx, magic_fail);
180 if (out->data == NULL) {
181 return NT_STATUS_NO_MEMORY;
183 return NT_STATUS_LOGON_FAILURE;
186 if (gensec_security->remote_addr == NULL) {
187 state->step = GENSEC_NCALRPC_ERROR;
188 *out = data_blob_dup_talloc(mem_ctx, magic_fail);
189 if (out->data == NULL) {
190 return NT_STATUS_NO_MEMORY;
192 return NT_STATUS_LOGON_FAILURE;
195 unix_path = tsocket_address_unix_path(gensec_security->remote_addr,
197 if (unix_path == NULL) {
198 state->step = GENSEC_NCALRPC_ERROR;
199 *out = data_blob_dup_talloc(mem_ctx, magic_fail);
200 if (out->data == NULL) {
201 return NT_STATUS_NO_MEMORY;
203 return NT_STATUS_LOGON_FAILURE;
206 cmp = strcmp(unix_path, "/root/ncalrpc_as_system");
207 TALLOC_FREE(unix_path);
209 state->step = GENSEC_NCALRPC_ERROR;
210 *out = data_blob_dup_talloc(mem_ctx, magic_fail);
211 if (out->data == NULL) {
212 return NT_STATUS_NO_MEMORY;
214 return NT_STATUS_LOGON_FAILURE;
217 status = auth_system_user_info_dc(state,
218 lpcfg_netbios_name(gensec_security->settings->lp_ctx),
219 &state->user_info_dc);
220 if (!NT_STATUS_IS_OK(status)) {
221 state->step = GENSEC_NCALRPC_ERROR;
222 *out = data_blob_dup_talloc(mem_ctx, magic_fail);
223 if (out->data == NULL) {
224 return NT_STATUS_NO_MEMORY;
229 *out = data_blob_dup_talloc(mem_ctx, magic_ok);
230 if (out->data == NULL) {
231 state->step = GENSEC_NCALRPC_ERROR;
232 return NT_STATUS_NO_MEMORY;
235 state->step = GENSEC_NCALRPC_DONE;
239 state->step = GENSEC_NCALRPC_ERROR;
240 return NT_STATUS_INTERNAL_ERROR;
243 static NTSTATUS gensec_ncalrpc_update_recv(struct tevent_req *req,
244 TALLOC_CTX *out_mem_ctx,
247 struct gensec_ncalrpc_update_state *state =
249 struct gensec_ncalrpc_update_state);
252 *out = data_blob_null;
254 if (tevent_req_is_nterror(req, &status)) {
255 tevent_req_received(req);
259 status = state->status;
260 talloc_steal(out_mem_ctx, state->out.data);
262 tevent_req_received(req);
266 static NTSTATUS gensec_ncalrpc_session_info(struct gensec_security *gensec_security,
268 struct auth_session_info **psession_info)
270 struct gensec_ncalrpc_state *state =
271 talloc_get_type_abort(gensec_security->private_data,
272 struct gensec_ncalrpc_state);
273 struct auth4_context *auth_ctx = gensec_security->auth_context;
274 struct auth_session_info *session_info = NULL;
275 uint32_t session_info_flags = 0;
278 if (gensec_security->gensec_role != GENSEC_SERVER) {
279 return NT_STATUS_INVALID_PARAMETER;
282 if (state->step != GENSEC_NCALRPC_DONE) {
283 return NT_STATUS_INVALID_PARAMETER;
286 if (auth_ctx == NULL) {
287 DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
288 return NT_STATUS_INTERNAL_ERROR;
291 if (auth_ctx->generate_session_info == NULL) {
292 DEBUG(0, ("Cannot generate a session_info without the generate_session_info hook\n"));
293 return NT_STATUS_INTERNAL_ERROR;
296 if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
297 session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
300 session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
302 status = auth_ctx->generate_session_info(
306 state->user_info_dc->info->account_name,
309 if (!NT_STATUS_IS_OK(status)) {
313 *psession_info = session_info;
317 /* We have no features */
318 static bool gensec_ncalrpc_have_feature(struct gensec_security *gensec_security,
321 if (feature & GENSEC_FEATURE_DCE_STYLE) {
328 static const struct gensec_security_ops gensec_ncalrpc_security_ops = {
329 .name = "naclrpc_as_system",
330 .auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM,
331 .client_start = gensec_ncalrpc_client_start,
332 .server_start = gensec_ncalrpc_server_start,
333 .update_send = gensec_ncalrpc_update_send,
334 .update_recv = gensec_ncalrpc_update_recv,
335 .session_info = gensec_ncalrpc_session_info,
336 .have_feature = gensec_ncalrpc_have_feature,
338 .priority = GENSEC_EXTERNAL,
341 _PUBLIC_ NTSTATUS gensec_ncalrpc_as_system_init(void)
345 status = gensec_register(&gensec_ncalrpc_security_ops);
346 if (!NT_STATUS_IS_OK(status)) {
347 DEBUG(0, ("Failed to register '%s' gensec backend!\n",
348 gensec_ncalrpc_security_ops.name));