source: branches/samba-3.5.x/source4/ldap_server/ldap_bind.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 9.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 LDAP server
4 Copyright (C) Stefan Metzmacher 2004
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "ldap_server/ldap_server.h"
22#include "auth/auth.h"
23#include "libcli/ldap/ldap.h"
24#include "smbd/service.h"
25#include "lib/ldb/include/ldb.h"
26#include "lib/ldb/include/ldb_errors.h"
27#include "dsdb/samdb/samdb.h"
28#include "auth/gensec/gensec.h"
29#include "param/param.h"
30
31static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
32{
33 struct ldap_BindRequest *req = &call->request->r.BindRequest;
34 struct ldapsrv_reply *reply;
35 struct ldap_BindResponse *resp;
36
37 int result;
38 const char *errstr;
39 const char *nt4_domain, *nt4_account;
40
41 struct auth_session_info *session_info;
42
43 NTSTATUS status;
44
45 DEBUG(10, ("BindSimple dn: %s\n",req->dn));
46
47 status = crack_auto_name_to_nt4_name(call, call->conn->connection->event.ctx, call->conn->lp_ctx, req->dn, &nt4_domain, &nt4_account);
48 if (NT_STATUS_IS_OK(status)) {
49 status = authenticate_username_pw(call,
50 call->conn->connection->event.ctx,
51 call->conn->connection->msg_ctx,
52 call->conn->lp_ctx,
53 nt4_domain, nt4_account,
54 req->creds.password,
55 &session_info);
56 }
57
58 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
59 if (!reply) {
60 return NT_STATUS_NO_MEMORY;
61 }
62
63 if (NT_STATUS_IS_OK(status)) {
64 result = LDAP_SUCCESS;
65 errstr = NULL;
66
67 talloc_free(call->conn->session_info);
68 call->conn->session_info = session_info;
69 talloc_steal(call->conn, session_info);
70
71 /* don't leak the old LDB */
72 talloc_free(call->conn->ldb);
73
74 status = ldapsrv_backend_Init(call->conn);
75
76 if (!NT_STATUS_IS_OK(status)) {
77 result = LDAP_OPERATIONS_ERROR;
78 errstr = talloc_asprintf(reply, "Simple Bind: Failed to advise ldb new credentials: %s", nt_errstr(status));
79 }
80 } else {
81 status = auth_nt_status_squash(status);
82
83 result = LDAP_INVALID_CREDENTIALS;
84 errstr = talloc_asprintf(reply, "Simple Bind Failed: %s", nt_errstr(status));
85 }
86
87 resp = &reply->msg->r.BindResponse;
88 resp->response.resultcode = result;
89 resp->response.errormessage = errstr;
90 resp->response.dn = NULL;
91 resp->response.referral = NULL;
92 resp->SASL.secblob = NULL;
93
94 ldapsrv_queue_reply(call, reply);
95 return NT_STATUS_OK;
96}
97
98struct ldapsrv_sasl_context {
99 struct ldapsrv_connection *conn;
100 struct socket_context *sasl_socket;
101};
102
103static void ldapsrv_set_sasl(void *private_data)
104{
105 struct ldapsrv_sasl_context *ctx = talloc_get_type(private_data, struct ldapsrv_sasl_context);
106 talloc_steal(ctx->conn->connection, ctx->sasl_socket);
107 talloc_unlink(ctx->conn->connection, ctx->conn->connection->socket);
108
109 ctx->conn->sockets.sasl = ctx->sasl_socket;
110 ctx->conn->connection->socket = ctx->sasl_socket;
111 packet_set_socket(ctx->conn->packet, ctx->conn->connection->socket);
112}
113
114static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
115{
116 struct ldap_BindRequest *req = &call->request->r.BindRequest;
117 struct ldapsrv_reply *reply;
118 struct ldap_BindResponse *resp;
119 struct ldapsrv_connection *conn;
120 int result = 0;
121 const char *errstr=NULL;
122 NTSTATUS status = NT_STATUS_OK;
123
124 DEBUG(10, ("BindSASL dn: %s\n",req->dn));
125
126 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
127 if (!reply) {
128 return NT_STATUS_NO_MEMORY;
129 }
130 resp = &reply->msg->r.BindResponse;
131
132 conn = call->conn;
133
134 /*
135 * TODO: a SASL bind with a different mechanism
136 * should cancel an inprogress SASL bind.
137 * (see RFC 4513)
138 */
139
140 if (!conn->gensec) {
141 conn->session_info = NULL;
142
143 status = samba_server_gensec_start(conn,
144 conn->connection->event.ctx,
145 conn->connection->msg_ctx,
146 conn->lp_ctx,
147 conn->server_credentials,
148 "ldap",
149 &conn->gensec);
150 if (!NT_STATUS_IS_OK(status)) {
151 DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
152 result = LDAP_OPERATIONS_ERROR;
153 errstr = talloc_asprintf(reply, "SASL: Failed to start authentication system: %s",
154 nt_errstr(status));
155 } else {
156
157 gensec_want_feature(conn->gensec, GENSEC_FEATURE_SIGN);
158 gensec_want_feature(conn->gensec, GENSEC_FEATURE_SEAL);
159 gensec_want_feature(conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
160
161 status = gensec_start_mech_by_sasl_name(conn->gensec, req->creds.SASL.mechanism);
162
163 if (!NT_STATUS_IS_OK(status)) {
164 DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
165 req->creds.SASL.mechanism, nt_errstr(status)));
166 result = LDAP_OPERATIONS_ERROR;
167 errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to start authentication backend: %s",
168 req->creds.SASL.mechanism, nt_errstr(status));
169 }
170 }
171 }
172
173 if (NT_STATUS_IS_OK(status)) {
174 DATA_BLOB input = data_blob(NULL, 0);
175 DATA_BLOB output = data_blob(NULL, 0);
176
177 if (req->creds.SASL.secblob) {
178 input = *req->creds.SASL.secblob;
179 }
180
181 status = gensec_update(conn->gensec, reply,
182 input, &output);
183
184 /* Windows 2000 mmc doesn't like secblob == NULL and reports a decoding error */
185 resp->SASL.secblob = talloc(reply, DATA_BLOB);
186 NT_STATUS_HAVE_NO_MEMORY(resp->SASL.secblob);
187 *resp->SASL.secblob = output;
188 } else {
189 resp->SASL.secblob = NULL;
190 }
191
192 if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
193 result = LDAP_SASL_BIND_IN_PROGRESS;
194 errstr = NULL;
195 } else if (NT_STATUS_IS_OK(status)) {
196 struct auth_session_info *old_session_info=NULL;
197 struct ldapsrv_sasl_context *ctx;
198
199 result = LDAP_SUCCESS;
200 errstr = NULL;
201
202 ctx = talloc(call, struct ldapsrv_sasl_context);
203
204 if (!ctx) {
205 status = NT_STATUS_NO_MEMORY;
206 } else {
207 ctx->conn = conn;
208 status = gensec_socket_init(conn->gensec,
209 conn->connection,
210 conn->connection->socket,
211 conn->connection->event.ctx,
212 stream_io_handler_callback,
213 conn->connection,
214 &ctx->sasl_socket);
215 }
216
217 if (!ctx || !NT_STATUS_IS_OK(status)) {
218 conn->session_info = old_session_info;
219 result = LDAP_OPERATIONS_ERROR;
220 errstr = talloc_asprintf(reply,
221 "SASL:[%s]: Failed to setup SASL socket: %s",
222 req->creds.SASL.mechanism, nt_errstr(status));
223 } else {
224
225 call->send_callback = ldapsrv_set_sasl;
226 call->send_private = ctx;
227
228 old_session_info = conn->session_info;
229 conn->session_info = NULL;
230 status = gensec_session_info(conn->gensec, &conn->session_info);
231 if (!NT_STATUS_IS_OK(status)) {
232 conn->session_info = old_session_info;
233 result = LDAP_OPERATIONS_ERROR;
234 errstr = talloc_asprintf(reply,
235 "SASL:[%s]: Failed to get session info: %s",
236 req->creds.SASL.mechanism, nt_errstr(status));
237 } else {
238 talloc_free(old_session_info);
239 talloc_steal(conn, conn->session_info);
240
241 /* don't leak the old LDB */
242 talloc_free(conn->ldb);
243
244 status = ldapsrv_backend_Init(conn);
245
246 if (!NT_STATUS_IS_OK(status)) {
247 result = LDAP_OPERATIONS_ERROR;
248 errstr = talloc_asprintf(reply,
249 "SASL:[%s]: Failed to advise samdb of new credentials: %s",
250 req->creds.SASL.mechanism,
251 nt_errstr(status));
252 }
253 }
254 }
255 } else {
256 status = auth_nt_status_squash(status);
257 if (result == 0) {
258 result = LDAP_INVALID_CREDENTIALS;
259 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
260 }
261 }
262
263 resp->response.resultcode = result;
264 resp->response.dn = NULL;
265 resp->response.errormessage = errstr;
266 resp->response.referral = NULL;
267
268 ldapsrv_queue_reply(call, reply);
269 return NT_STATUS_OK;
270}
271
272NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
273{
274 struct ldap_BindRequest *req = &call->request->r.BindRequest;
275 struct ldapsrv_reply *reply;
276 struct ldap_BindResponse *resp;
277
278 /*
279 * TODO: we should fail the bind request
280 * if there're any pending requests.
281 *
282 * also a simple bind should cancel an
283 * inprogress SASL bind.
284 * (see RFC 4513)
285 */
286 switch (req->mechanism) {
287 case LDAP_AUTH_MECH_SIMPLE:
288 return ldapsrv_BindSimple(call);
289 case LDAP_AUTH_MECH_SASL:
290 return ldapsrv_BindSASL(call);
291 }
292
293 reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
294 if (!reply) {
295 return NT_STATUS_NO_MEMORY;
296 }
297
298 resp = &reply->msg->r.BindResponse;
299 resp->response.resultcode = 7;
300 resp->response.dn = NULL;
301 resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
302 resp->response.referral = NULL;
303 resp->SASL.secblob = NULL;
304
305 ldapsrv_queue_reply(call, reply);
306 return NT_STATUS_OK;
307}
308
309NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
310{
311 DEBUG(10, ("UnbindRequest\n"));
312 return NT_STATUS_OK;
313}
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