2 Unix SMB/CIFS mplementation.
6 Copyright (C) Andrew Tridgell 2005
7 Copyright (C) Volker Lendecke 2004
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.
26 #include "libcli/ldap/ldap.h"
27 #include "libcli/ldap/ldap_client.h"
28 #include "lib/tls/tls.h"
29 #include "auth/auth.h"
30 #include "auth/gensec/socket.h"
31 #include "lib/stream/packet.h"
33 struct ldap_simple_creds {
38 NTSTATUS ldap_rebind(struct ldap_connection *conn)
41 struct ldap_simple_creds *creds;
43 switch (conn->bind.type) {
45 status = ldap_bind_sasl(conn, (struct cli_credentials *)conn->bind.creds);
48 case LDAP_BIND_SIMPLE:
49 creds = (struct ldap_simple_creds *)conn->bind.creds;
52 return NT_STATUS_UNSUCCESSFUL;
55 status = ldap_bind_simple(conn, creds->dn, creds->pw);
59 return NT_STATUS_UNSUCCESSFUL;
66 static struct ldap_message *new_ldap_simple_bind_msg(struct ldap_connection *conn,
67 const char *dn, const char *pw)
69 struct ldap_message *res;
71 res = new_ldap_message(conn);
76 res->type = LDAP_TAG_BindRequest;
77 res->r.BindRequest.version = 3;
78 res->r.BindRequest.dn = talloc_strdup(res, dn);
79 res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SIMPLE;
80 res->r.BindRequest.creds.password = talloc_strdup(res, pw);
88 perform a simple username/password bind
90 NTSTATUS ldap_bind_simple(struct ldap_connection *conn,
91 const char *userdn, const char *password)
93 struct ldap_request *req;
94 struct ldap_message *msg;
99 return NT_STATUS_INVALID_CONNECTION;
115 if (conn->simple_pw) {
116 pw = conn->simple_pw;
122 msg = new_ldap_simple_bind_msg(conn, dn, pw);
123 NT_STATUS_HAVE_NO_MEMORY(msg);
125 /* send the request */
126 req = ldap_request_send(conn, msg);
128 NT_STATUS_HAVE_NO_MEMORY(req);
130 /* wait for replies */
131 status = ldap_request_wait(req);
132 if (!NT_STATUS_IS_OK(status)) {
137 /* check its a valid reply */
138 msg = req->replies[0];
139 if (msg->type != LDAP_TAG_BindResponse) {
141 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
144 status = ldap_check_response(conn, &msg->r.BindResponse.response);
148 if (NT_STATUS_IS_OK(status)) {
149 struct ldap_simple_creds *creds = talloc(conn, struct ldap_simple_creds);
151 return NT_STATUS_NO_MEMORY;
153 creds->dn = talloc_strdup(creds, dn);
154 creds->pw = talloc_strdup(creds, pw);
155 if (creds->dn == NULL || creds->pw == NULL) {
156 return NT_STATUS_NO_MEMORY;
158 conn->bind.type = LDAP_BIND_SIMPLE;
159 conn->bind.creds = creds;
166 static struct ldap_message *new_ldap_sasl_bind_msg(struct ldap_connection *conn,
167 const char *sasl_mechanism,
170 struct ldap_message *res;
172 res = new_ldap_message(conn);
177 res->type = LDAP_TAG_BindRequest;
178 res->r.BindRequest.version = 3;
179 res->r.BindRequest.dn = "";
180 res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SASL;
181 res->r.BindRequest.creds.SASL.mechanism = talloc_strdup(res, sasl_mechanism);
183 res->r.BindRequest.creds.SASL.secblob = talloc(res, DATA_BLOB);
184 if (!res->r.BindRequest.creds.SASL.secblob) {
188 *res->r.BindRequest.creds.SASL.secblob = *secblob;
190 res->r.BindRequest.creds.SASL.secblob = NULL;
192 res->controls = NULL;
199 perform a sasl bind using the given credentials
201 NTSTATUS ldap_bind_sasl(struct ldap_connection *conn, struct cli_credentials *creds)
204 TALLOC_CTX *tmp_ctx = NULL;
206 DATA_BLOB input = data_blob(NULL, 0);
207 DATA_BLOB output = data_blob(NULL, 0);
209 struct ldap_message **sasl_mechs_msgs;
210 struct ldap_SearchResEntry *search;
213 const char **sasl_names;
215 static const char *supported_sasl_mech_attrs[] = {
216 "supportedSASLMechanisms",
220 status = gensec_client_start(conn, &conn->gensec, NULL);
221 if (!NT_STATUS_IS_OK(status)) {
222 DEBUG(0, ("Failed to start GENSEC engine (%s)\n", nt_errstr(status)));
226 /* require Kerberos SIGN/SEAL only if we don't use SSL
227 * Windows seem not to like double encryption */
228 if (!tls_enabled(conn->sock)) {
229 gensec_want_feature(conn->gensec, 0 | GENSEC_FEATURE_SIGN | GENSEC_FEATURE_SEAL);
232 status = gensec_set_credentials(conn->gensec, creds);
233 if (!NT_STATUS_IS_OK(status)) {
234 DEBUG(1, ("Failed to set GENSEC creds: %s\n",
239 status = gensec_set_target_hostname(conn->gensec, conn->host);
240 if (!NT_STATUS_IS_OK(status)) {
241 DEBUG(1, ("Failed to set GENSEC target hostname: %s\n",
246 status = gensec_set_target_service(conn->gensec, "ldap");
247 if (!NT_STATUS_IS_OK(status)) {
248 DEBUG(1, ("Failed to set GENSEC target service: %s\n",
253 status = ildap_search(conn, "", LDAP_SEARCH_SCOPE_BASE, "", supported_sasl_mech_attrs,
254 False, NULL, NULL, &sasl_mechs_msgs);
255 if (!NT_STATUS_IS_OK(status)) {
256 DEBUG(1, ("Failed to inquire of target's available sasl mechs in rootdse search: %s\n",
261 count = ildap_count_entries(conn, sasl_mechs_msgs);
263 DEBUG(1, ("Failed to inquire of target's available sasl mechs in rootdse search: wrong number of replies: %d\n",
268 tmp_ctx = talloc_new(conn);
269 if (tmp_ctx == NULL) goto failed;
271 search = &sasl_mechs_msgs[0]->r.SearchResultEntry;
272 if (search->num_attributes != 1) {
273 DEBUG(1, ("Failed to inquire of target's available sasl mechs in rootdse search: wrong number of attributes: %d\n",
274 search->num_attributes));
278 sasl_names = talloc_array(tmp_ctx, const char *, search->attributes[0].num_values + 1);
280 DEBUG(1, ("talloc_arry(char *, %d) failed\n",
285 for (i=0; i<search->attributes[0].num_values; i++) {
286 sasl_names[i] = (const char *)search->attributes[0].values[i].data;
288 sasl_names[i] = NULL;
290 status = gensec_start_mech_by_sasl_list(conn->gensec, sasl_names);
291 if (!NT_STATUS_IS_OK(status)) {
292 DEBUG(1, ("None of the %d proposed SASL mechs were acceptable: %s\n",
293 count, nt_errstr(status)));
298 NTSTATUS gensec_status;
299 struct ldap_message *response;
300 struct ldap_message *msg;
301 struct ldap_request *req;
302 int result = LDAP_OTHER;
304 status = gensec_update(conn->gensec, tmp_ctx,
307 /* The status value here, from GENSEC is vital to the security
308 * of the system. Even if the other end accepts, if GENSEC
309 * claims 'MORE_PROCESSING_REQUIRED' then you must keep
310 * feeding it blobs, or else the remote host/attacker might
311 * avoid mutal authentication requirements.
313 * Likewise, you must not feed GENSEC too much (after the OK),
314 * it doesn't like that either
317 gensec_status = status;
319 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
320 !NT_STATUS_IS_OK(status)) {
323 if (NT_STATUS_IS_OK(status) && output.length == 0) {
327 /* Perhaps we should make gensec_start_mech_by_sasl_list() return the name we got? */
328 msg = new_ldap_sasl_bind_msg(tmp_ctx, conn->gensec->ops->sasl_name, (output.data?&output:NULL));
330 status = NT_STATUS_NO_MEMORY;
334 req = ldap_request_send(conn, msg);
336 status = NT_STATUS_NO_MEMORY;
339 talloc_steal(tmp_ctx, req);
341 status = ldap_result_n(req, 0, &response);
342 if (!NT_STATUS_IS_OK(status)) {
346 if (response->type != LDAP_TAG_BindResponse) {
347 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
351 result = response->r.BindResponse.response.resultcode;
353 if (result != LDAP_SUCCESS && result != LDAP_SASL_BIND_IN_PROGRESS) {
354 status = ldap_check_response(conn,
355 &response->r.BindResponse.response);
359 /* This is where we check if GENSEC wanted to be fed more data */
360 if (!NT_STATUS_EQUAL(gensec_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
363 if (response->r.BindResponse.SASL.secblob) {
364 input = *response->r.BindResponse.SASL.secblob;
366 input = data_blob(NULL, 0);
370 talloc_free(tmp_ctx);
372 if (NT_STATUS_IS_OK(status)) {
373 struct socket_context *sasl_socket;
374 status = gensec_socket_init(conn->gensec,
376 conn->event.event_ctx,
377 ldap_read_io_handler,
380 if (!NT_STATUS_IS_OK(status)) goto failed;
382 talloc_steal(conn->sock, sasl_socket);
383 talloc_unlink(conn, conn->sock);
384 conn->sock = sasl_socket;
385 packet_set_socket(conn->packet, conn->sock);
387 conn->bind.type = LDAP_BIND_SASL;
388 conn->bind.creds = creds;
394 talloc_free(tmp_ctx);
395 talloc_free(conn->gensec);