1 /* bind.c - decode an ldap bind operation and pass it to a backend db */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
9 * Copyright (c) 1995 Regents of the University of Michigan.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms are permitted
13 * provided that this notice is preserved and that due credit is given
14 * to the University of Michigan at Ann Arbor. The name of the University
15 * may not be used to endorse or promote products derived from this
16 * software without specific prior written permission. This software
17 * is provided ``as is'' without express or implied warranty.
24 #include <ac/string.h>
25 #include <ac/socket.h>
36 BerElement *ber = op->o_ber;
43 int rc = LDAP_SUCCESS;
48 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
55 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
58 * Force to connection to "anonymous" until bind succeeds.
61 if ( conn->c_cdn != NULL ) {
66 if ( conn->c_dn != NULL ) {
71 conn->c_authc_backend = NULL;
72 conn->c_authz_backend = NULL;
74 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
76 if ( op->o_dn != NULL ) {
78 op->o_dn = ch_strdup( "" );
81 if ( op->o_ndn != NULL ) {
83 op->o_ndn = ch_strdup( "" );
87 * Parse the bind request. It looks like this:
89 * BindRequest ::= SEQUENCE {
90 * version INTEGER, -- version
91 * name DistinguishedName, -- dn
92 * authentication CHOICE {
93 * simple [0] OCTET STRING -- passwd
94 * krbv42ldap [1] OCTET STRING
95 * krbv42dsa [2] OCTET STRING
96 * SASL [3] SaslCredentials
100 * SaslCredentials ::= SEQUENCE {
101 * mechanism LDAPString,
102 * credentials OCTET STRING OPTIONAL
106 tag = ber_scanf( ber, "{iat" /*}*/, &version, &dn, &method );
108 if ( tag == LBER_ERROR ) {
109 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
110 send_ldap_disconnect( conn, op,
111 LDAP_PROTOCOL_ERROR, "decoding error" );
116 op->o_protocol = version;
118 if( method != LDAP_AUTH_SASL ) {
119 tag = ber_scanf( ber, /*{*/ "o}", &cred );
122 tag = ber_scanf( ber, "{a" /*}*/, &mech );
124 if ( tag != LBER_ERROR ) {
126 tag = ber_peek_tag( ber, &len );
128 if ( tag == LDAP_TAG_LDAPCRED ) {
129 tag = ber_scanf( ber, "o", &cred );
132 if ( tag != LBER_ERROR ) {
133 tag = ber_scanf( ber, /*{{*/ "}}" );
138 if ( tag == LBER_ERROR ) {
139 send_ldap_disconnect( conn, op,
142 rc = SLAPD_DISCONNECT;
146 if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
147 Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
151 ndn = ch_strdup( dn );
153 if ( dn_normalize( ndn ) == NULL ) {
154 Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 );
155 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
156 "invalid DN", NULL, NULL );
160 if( method == LDAP_AUTH_SASL ) {
161 Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
164 Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n",
165 (unsigned long) version, dn, (unsigned long) method );
168 Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
169 op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 );
171 if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
172 Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
173 (unsigned long) version, 0, 0 );
174 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
175 NULL, "requested protocol version not supported", NULL, NULL );
179 /* we set connection version regardless of whether bind succeeds
182 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
183 conn->c_protocol = version;
184 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
186 if ( method == LDAP_AUTH_SASL ) {
189 if ( version < LDAP_VERSION3 ) {
190 Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
191 (unsigned long) version, 0, 0 );
192 send_ldap_disconnect( conn, op,
193 LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
194 rc = SLAPD_DISCONNECT;
198 if( mech == NULL || *mech == '\0' ) {
199 Debug( LDAP_DEBUG_ANY,
200 "do_bind: no sasl mechanism provided\n",
202 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
203 NULL, "no SASL mechanism provided", NULL, NULL );
207 if( !charray_inlist( supportedSASLMechanisms, mech ) ) {
208 Debug( LDAP_DEBUG_ANY,
209 "do_bind: sasl mechanism=\"%s\" not supported.\n",
211 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
212 NULL, "SASL mechanism not supported", NULL, NULL );
216 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
218 if ( conn->c_sasl_bind_mech != NULL ) {
219 if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) {
220 /* mechanism changed, cancel in progress bind */
221 #ifdef HAVE_CYRUS_SASL
222 sasl_dispose(&conn->c_sasl_bind_context);
223 conn->c_sasl_bind_context = NULL;
226 free( conn->c_sasl_bind_mech );
227 conn->c_sasl_bind_mech = NULL;
230 #ifdef HAVE_CYRUS_SASL
232 assert( conn->c_sasl_bind_context == NULL );
237 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
240 rc = sasl_bind( conn, op, dn, ndn, mech, &cred, &edn );
242 if( rc == LDAP_SUCCESS ) {
243 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
244 #ifdef HAVE_CYRUS_SASL
245 assert( conn->c_sasl_bind_context == NULL );
248 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
250 } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
251 #ifdef HAVE_CYRUS_SASL
252 assert( conn->c_sasl_bind_context != NULL );
254 conn->c_sasl_bind_mech = mech;
257 #ifdef HAVE_CYRUS_SASL
259 assert( conn->c_sasl_bind_context != NULL );
266 /* Not SASL, cancel any in-progress bind */
267 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
269 if ( conn->c_sasl_bind_mech != NULL ) {
270 assert( conn->c_sasl_bind_in_progress );
272 free(conn->c_sasl_bind_mech);
273 conn->c_sasl_bind_mech = NULL;
275 #ifdef HAVE_CYRUS_SASL
276 assert( conn->c_sasl_bind_context != NULL );
277 sasl_dispose(&conn->c_sasl_bind_context);
278 conn->c_sasl_bind_context = NULL;
281 assert( !conn->c_sasl_bind_in_progress );
282 #ifdef HAVE_CYRUS_SASL
283 assert( conn->c_sasl_bind_context == NULL );
287 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
290 /* accept "anonymous" binds */
291 if ( cred.bv_len == 0 || ndn == NULL || *ndn == '\0' ) {
293 * we already forced connection to "anonymous",
294 * just need to send success
296 send_ldap_result( conn, op, LDAP_SUCCESS,
297 NULL, NULL, NULL, NULL );
298 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
304 * We could be serving multiple database backends. Select the
305 * appropriate one, or send a referral to our "referral server"
306 * if we don't hold it.
309 if ( (be = select_backend( ndn )) == NULL ) {
310 if ( default_referral ) {
311 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
312 NULL, NULL, default_referral, NULL );
315 /* noSuchObject is not allowed to be returned by bind */
316 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
317 NULL, NULL, NULL, NULL );
323 conn->c_authz_backend = be;
325 /* make sure this backend recongizes critical controls */
326 rc = backend_check_controls( be, conn, op, &text ) ;
328 if( rc != LDAP_SUCCESS ) {
329 send_ldap_result( conn, op, rc,
330 NULL, text, NULL, NULL );
339 /* deref suffix alias if appropriate */
340 ndn = suffix_alias( be, ndn );
342 ret = (*be->be_bind)( be, conn, op, dn, ndn,
343 method, &cred, &edn );
346 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
358 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n",
359 version, conn->c_cdn, conn->c_dn );
361 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
363 /* send this here to avoid a race condition */
364 send_ldap_result( conn, op, LDAP_SUCCESS,
365 NULL, NULL, NULL, NULL );
367 } else if (edn != NULL) {
372 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
373 NULL, "operation not supported within namingContext", NULL, NULL );
383 if ( mech != NULL ) {
386 if ( cred.bv_val != NULL ) {