2 Unix SMB/CIFS implementation.
6 Copyright (C) Volker Lendecke 2005
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "libcli/composite/composite.h"
26 #include "winbind/wb_server.h"
27 #include "smbd/service_task.h"
28 #include "auth/credentials/credentials.h"
29 #include "libcli/auth/libcli_auth.h"
30 #include "librpc/gen_ndr/ndr_netlogon.h"
31 #include "librpc/gen_ndr/ndr_netlogon_c.h"
33 /* Oh, there is so much to keep an eye on when authenticating a user. Oh my! */
34 struct pam_auth_crap_state {
35 struct composite_context *ctx;
36 struct event_context *event_ctx;
37 uint32_t logon_parameters;
38 const char *domain_name;
39 const char *user_name;
41 const char *workstation;
42 DATA_BLOB chal, nt_resp, lm_resp;
44 struct creds_CredentialState *creds_state;
45 struct netr_Authenticator auth, auth2;
46 struct netr_NetworkInfo ninfo;
47 struct netr_LogonSamLogon r;
49 struct netr_UserSessionKey user_session_key;
50 struct netr_LMSessionKey lm_key;
55 * NTLM authentication.
58 static void pam_auth_crap_recv_domain(struct composite_context *ctx);
59 static void pam_auth_crap_recv_samlogon(struct rpc_request *req);
61 struct composite_context *wb_cmd_pam_auth_crap_send(TALLOC_CTX *mem_ctx,
62 struct wbsrv_service *service,
63 uint32_t logon_parameters,
66 const char *workstation,
71 struct composite_context *result, *ctx;
72 struct pam_auth_crap_state *state;
74 result = talloc(mem_ctx, struct composite_context);
75 if (result == NULL) goto failed;
76 result->state = COMPOSITE_STATE_IN_PROGRESS;
77 result->async.fn = NULL;
78 result->event_ctx = service->task->event_ctx;
80 state = talloc(result, struct pam_auth_crap_state);
81 if (state == NULL) goto failed;
83 result->private_data = state;
85 state->logon_parameters = logon_parameters;
87 state->domain_name = talloc_strdup(state, domain);
88 if (state->domain_name == NULL) goto failed;
90 state->user_name = talloc_strdup(state, user);
91 if (state->user_name == NULL) goto failed;
93 state->unix_username = NULL;
95 state->workstation = talloc_strdup(state, workstation);
96 if (state->workstation == NULL) goto failed;
98 state->chal = data_blob_talloc(state, chal.data, chal.length);
99 if ((chal.data != NULL) && (state->chal.data == NULL)) goto failed;
101 state->nt_resp = data_blob_talloc(state, nt_resp.data, nt_resp.length);
102 if ((nt_resp.data != NULL) &&
103 (state->nt_resp.data == NULL)) goto failed;
105 state->lm_resp = data_blob_talloc(state, lm_resp.data, lm_resp.length);
106 if ((lm_resp.data != NULL) &&
107 (state->lm_resp.data == NULL)) goto failed;
109 ctx = wb_sid2domain_send(state, service, service->primary_sid);
110 if (ctx == NULL) goto failed;
112 ctx->async.fn = pam_auth_crap_recv_domain;
113 ctx->async.private_data = state;
124 Send of a SamLogon request to authenticate a user.
126 static void pam_auth_crap_recv_domain(struct composite_context *ctx)
128 struct pam_auth_crap_state *state =
129 talloc_get_type(ctx->async.private_data,
130 struct pam_auth_crap_state);
131 struct rpc_request *req;
132 struct wbsrv_domain *domain;
134 state->ctx->status = wb_sid2domain_recv(ctx, &domain);
136 cli_credentials_get_netlogon_creds(domain->schannel_creds);
138 creds_client_authenticator(state->creds_state, &state->auth);
140 state->ninfo.identity_info.account_name.string = state->user_name;
141 state->ninfo.identity_info.domain_name.string = state->domain_name;
142 state->ninfo.identity_info.parameter_control = state->logon_parameters;
143 state->ninfo.identity_info.logon_id_low = 0;
144 state->ninfo.identity_info.logon_id_high = 0;
145 state->ninfo.identity_info.workstation.string = state->workstation;
147 SMB_ASSERT(state->chal.length == sizeof(state->ninfo.challenge));
148 memcpy(state->ninfo.challenge, state->chal.data,
149 sizeof(state->ninfo.challenge));
151 state->ninfo.nt.length = state->nt_resp.length;
152 state->ninfo.nt.data = state->nt_resp.data;
153 state->ninfo.lm.length = state->lm_resp.length;
154 state->ninfo.lm.data = state->lm_resp.data;
156 state->r.in.server_name = talloc_asprintf(
157 state, "\\\\%s", dcerpc_server_name(domain->netlogon_pipe));
158 if (composite_nomem(state->r.in.server_name, state->ctx)) return;
160 ZERO_STRUCT(state->auth2);
162 state->r.in.computer_name =
163 cli_credentials_get_workstation(domain->schannel_creds);
164 state->r.in.credential = &state->auth;
165 state->r.in.return_authenticator = &state->auth2;
166 state->r.in.logon_level = 2;
167 state->r.in.validation_level = 3;
168 state->r.in.logon.network = &state->ninfo;
169 state->r.out.return_authenticator = NULL;
171 req = dcerpc_netr_LogonSamLogon_send(domain->netlogon_pipe, state,
173 composite_continue_rpc(state->ctx, req, pam_auth_crap_recv_samlogon,
180 Check the SamLogon reply, decrypt and parse out the session keys and the
183 static void pam_auth_crap_recv_samlogon(struct rpc_request *req)
185 struct pam_auth_crap_state *state =
186 talloc_get_type(req->async.private,
187 struct pam_auth_crap_state);
188 struct netr_SamBaseInfo *base;
191 state->ctx->status = dcerpc_ndr_request_recv(req);
192 if (!composite_is_ok(state->ctx)) return;
194 if ((state->r.out.return_authenticator == NULL) ||
195 (!creds_client_check(state->creds_state,
196 &state->r.out.return_authenticator->cred))) {
197 DEBUG(0, ("Credentials check failed!\n"));
198 composite_error(state->ctx, NT_STATUS_ACCESS_DENIED);
202 state->ctx->status = state->r.out.result;
203 if (!composite_is_ok(state->ctx)) return;
205 /* Decrypt the session keys before we reform the info3, so the
206 * person on the other end of winbindd pipe doesn't have to.
207 * They won't have the encryption key anyway */
208 creds_decrypt_samlogon(state->creds_state,
209 state->r.in.validation_level,
210 &state->r.out.validation);
212 state->ctx->status = ndr_push_struct_blob(
213 &tmp_blob, state, state->r.out.validation.sam3,
214 (ndr_push_flags_fn_t)ndr_push_netr_SamInfo3);
215 if (!composite_is_ok(state->ctx)) return;
217 /* The Samba3 protocol is a bit broken (due to non-IDL
218 * heritage, so for compatability we must add a non-zero 4
219 * bytes to the info3 */
220 state->info3 = data_blob_talloc(state, NULL, tmp_blob.length+4);
221 if (composite_nomem(state->info3.data, state->ctx)) return;
223 SIVAL(state->info3.data, 0, 1);
224 memcpy(state->info3.data+4, tmp_blob.data, tmp_blob.length);
226 /* We actually only ask for level 3, and assume it above, but
230 switch(state->r.in.validation_level) {
232 base = &state->r.out.validation.sam2->base;
235 base = &state->r.out.validation.sam3->base;
238 base = &state->r.out.validation.sam6->base;
242 composite_error(state->ctx, NT_STATUS_INTERNAL_ERROR);
246 state->user_session_key = base->key;
247 state->lm_key = base->LMSessKey;
249 /* Give the caller the most accurate username possible.
250 * Assists where case sensitive comparisons may be done by our
251 * ntlm_auth callers */
252 if (base->account_name.string) {
253 state->user_name = base->account_name.string;
254 talloc_steal(state, base->account_name.string);
256 if (base->domain.string) {
257 state->domain_name = base->domain.string;
258 talloc_steal(state, base->domain.string);
261 state->unix_username = talloc_asprintf(state, "%s%s%s",
263 lp_winbind_separator(),
265 if (composite_nomem(state->unix_username, state->ctx)) return;
267 composite_done(state->ctx);
270 NTSTATUS wb_cmd_pam_auth_crap_recv(struct composite_context *c,
273 struct netr_UserSessionKey *user_session_key,
274 struct netr_LMSessionKey *lm_key,
275 char **unix_username)
277 struct pam_auth_crap_state *state =
278 talloc_get_type(c->private_data, struct pam_auth_crap_state);
279 NTSTATUS status = composite_wait(c);
280 if (NT_STATUS_IS_OK(status)) {
281 info3->length = state->info3.length;
282 info3->data = talloc_steal(mem_ctx, state->info3.data);
283 *user_session_key = state->user_session_key;
284 *lm_key = state->lm_key;
285 *unix_username = talloc_steal(mem_ctx, state->unix_username);
291 NTSTATUS wb_cmd_pam_auth_crap(TALLOC_CTX *mem_ctx,
292 struct wbsrv_service *service,
293 uint32_t logon_parameters,
294 const char *domain, const char *user,
295 const char *workstation,
296 DATA_BLOB chal, DATA_BLOB nt_resp,
299 struct netr_UserSessionKey *user_session_key,
300 struct netr_LMSessionKey *lm_key,
301 char **unix_username)
303 struct composite_context *c =
304 wb_cmd_pam_auth_crap_send(mem_ctx, service, logon_parameters,
305 domain, user, workstation,
306 chal, nt_resp, lm_resp);
307 return wb_cmd_pam_auth_crap_recv(c, mem_ctx, info3, user_session_key,
308 lm_key, unix_username);
311 struct composite_context *wb_cmd_pam_auth_send(TALLOC_CTX *mem_ctx,
312 struct wbsrv_service *service,
315 const char *password)
317 struct cli_credentials *credentials;
318 const char *workstation;
321 DATA_BLOB chal, nt_resp, lm_resp, names_blob;
322 int flags = CLI_CRED_NTLM_AUTH;
323 if (lp_client_lanman_auth()) {
324 flags |= CLI_CRED_LANMAN_AUTH;
327 if (lp_client_ntlmv2_auth()) {
328 flags |= CLI_CRED_NTLMv2_AUTH;
331 DEBUG(5, ("wbsrv_samba3_pam_auth called\n"));
333 credentials = cli_credentials_init(mem_ctx);
337 cli_credentials_set_conf(credentials);
338 cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
339 cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
341 cli_credentials_set_password(credentials, password, CRED_SPECIFIED);
343 chal = data_blob_talloc(mem_ctx, NULL, 8);
347 generate_random_buffer(chal.data, chal.length);
348 cli_credentials_get_ntlm_username_domain(credentials, mem_ctx,
350 /* for best compatability with multiple vitual netbios names
351 * on the host, this should be generated from the
352 * cli_credentials associated with the machine account */
353 workstation = cli_credentials_get_workstation(credentials);
355 names_blob = NTLMv2_generate_names_blob(
357 cli_credentials_get_workstation(credentials),
358 cli_credentials_get_domain(credentials));
360 status = cli_credentials_get_ntlm_response(
361 credentials, mem_ctx, &flags, chal, names_blob,
362 &lm_resp, &nt_resp, NULL, NULL);
363 if (!NT_STATUS_IS_OK(status)) {
366 return wb_cmd_pam_auth_crap_send(mem_ctx, service,
367 0 /* logon parameters */,
368 domain, user, workstation,
369 chal, nt_resp, lm_resp);
372 NTSTATUS wb_cmd_pam_auth_recv(struct composite_context *c)
374 struct pam_auth_crap_state *state =
375 talloc_get_type(c->private_data, struct pam_auth_crap_state);
376 NTSTATUS status = composite_wait(c);
381 NTSTATUS wb_cmd_pam_auth(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
382 const char *domain, const char *user,
383 const char *password)
385 struct composite_context *c =
386 wb_cmd_pam_auth_send(mem_ctx, service, domain, user, password);
387 return wb_cmd_pam_auth_recv(c);