1 /* bind.c - decode an ldap bind operation and pass it to a backend db */
4 * Copyright 1998-2002 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;
40 struct berval dn = { 0, NULL };
41 struct berval pdn = { 0, NULL };
42 struct berval ndn = { 0, NULL };
44 int rc = LDAP_SUCCESS;
46 struct berval cred = { 0, NULL };
50 LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
51 "do_bind: conn %d\n", conn->c_connid ));
53 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
57 * Force to connection to "anonymous" until bind succeeds.
59 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
60 connection2anonymous( conn );
61 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
63 if ( op->o_dn.bv_val != NULL ) {
64 free( op->o_dn.bv_val );
65 op->o_dn.bv_val = ch_strdup( "" );
69 if ( op->o_ndn.bv_val != NULL ) {
70 free( op->o_ndn.bv_val );
71 op->o_ndn.bv_val = ch_strdup( "" );
76 * Parse the bind request. It looks like this:
78 * BindRequest ::= SEQUENCE {
79 * version INTEGER, -- version
80 * name DistinguishedName, -- dn
81 * authentication CHOICE {
82 * simple [0] OCTET STRING -- passwd
83 * krbv42ldap [1] OCTET STRING
84 * krbv42dsa [2] OCTET STRING
85 * SASL [3] SaslCredentials
89 * SaslCredentials ::= SEQUENCE {
90 * mechanism LDAPString,
91 * credentials OCTET STRING OPTIONAL
95 tag = ber_scanf( ber, "{imt" /*}*/, &version, &dn, &method );
97 if ( tag == LBER_ERROR ) {
99 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
100 "do_bind: conn %d ber_scanf failed\n", conn->c_connid ));
102 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
104 send_ldap_disconnect( conn, op,
105 LDAP_PROTOCOL_ERROR, "decoding error" );
110 op->o_protocol = version;
112 if( method != LDAP_AUTH_SASL ) {
113 tag = ber_scanf( ber, /*{*/ "m}", &cred );
116 tag = ber_scanf( ber, "{a" /*}*/, &mech );
118 if ( tag != LBER_ERROR ) {
120 tag = ber_peek_tag( ber, &len );
122 if ( tag == LDAP_TAG_LDAPCRED ) {
123 tag = ber_scanf( ber, "m", &cred );
125 tag = LDAP_TAG_LDAPCRED;
130 if ( tag != LBER_ERROR ) {
131 tag = ber_scanf( ber, /*{{*/ "}}" );
136 if ( tag == LBER_ERROR ) {
137 send_ldap_disconnect( conn, op,
140 rc = SLAPD_DISCONNECT;
144 if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
146 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
147 "do_bind: conn %d get_ctrls failed\n", conn->c_connid ));
149 Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
154 rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
155 if ( rc != LDAP_SUCCESS ) {
157 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
158 "do_bind: conn %d invalid dn (%s)\n",
159 conn->c_connid, dn.bv_val ));
161 Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n",
164 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
165 "invalid DN", NULL, NULL );
169 if( method == LDAP_AUTH_SASL ) {
171 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
172 "do_sasl_bind: conn %d dn (%s) mech %s\n", conn->c_connid,
175 Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
176 pdn.bv_val, mech, NULL );
181 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
182 "do_bind: conn %d version=%ld dn=\"%s\" method=%ld\n",
183 conn->c_connid, (unsigned long) version,
184 pdn.bv_val, (unsigned long)method ));
186 Debug( LDAP_DEBUG_TRACE,
187 "do_bind: version=%ld dn=\"%s\" method=%ld\n",
188 (unsigned long) version,
189 pdn.bv_val, (unsigned long) method );
193 Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
194 op->o_connid, op->o_opid, pdn.bv_val, (unsigned long) method, 0 );
196 if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
198 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
199 "do_bind: conn %d unknown version = %ld\n",
200 conn->c_connid, (unsigned long)version ));
202 Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
203 (unsigned long) version, 0, 0 );
205 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
206 NULL, "requested protocol version not supported", NULL, NULL );
209 } else if (!( global_allows & SLAP_ALLOW_BIND_V2 ) &&
210 version < LDAP_VERSION3 )
212 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
213 NULL, "requested protocol version not allowed", NULL, NULL );
217 /* we set connection version regardless of whether bind succeeds
220 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
221 conn->c_protocol = version;
222 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
224 /* check for inappropriate controls */
225 if( get_manageDSAit( op ) == SLAP_CRITICAL_CONTROL ) {
226 send_ldap_result( conn, op,
227 rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION,
228 NULL, "manageDSAit control inappropriate",
233 if ( method == LDAP_AUTH_SASL ) {
237 if ( version < LDAP_VERSION3 ) {
239 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
240 "do_bind: conn %d sasl with LDAPv%ld\n",
241 conn->c_connid, (unsigned long)version ));
243 Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
244 (unsigned long) version, 0, 0 );
246 send_ldap_disconnect( conn, op,
247 LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
248 rc = SLAPD_DISCONNECT;
252 if( mech == NULL || mech[0] == '\0' ) {
254 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
255 "do_bind: conn %d no SASL mechanism provided\n",
258 Debug( LDAP_DEBUG_ANY,
259 "do_bind: no sasl mechanism provided\n",
262 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
263 NULL, "no SASL mechanism provided", NULL, NULL );
267 /* check restrictions */
268 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
269 if( rc != LDAP_SUCCESS ) {
270 send_ldap_result( conn, op, rc,
271 NULL, text, NULL, NULL );
275 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
276 if ( conn->c_sasl_bind_in_progress ) {
277 if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) {
278 /* mechanism changed between bind steps */
279 slap_sasl_reset(conn);
282 conn->c_sasl_bind_mech = mech;
285 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
288 rc = slap_sasl_bind( conn, op,
292 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
293 if( rc == LDAP_SUCCESS ) {
294 conn->c_dn.bv_val = edn;
296 conn->c_dn.bv_len = strlen( edn );
297 dnNormalize2( NULL, &conn->c_dn, &conn->c_ndn );
299 conn->c_authmech = conn->c_sasl_bind_mech;
300 conn->c_sasl_bind_mech = NULL;
301 conn->c_sasl_bind_in_progress = 0;
303 conn->c_sasl_ssf = ssf;
304 if( ssf > conn->c_ssf ) {
308 if( conn->c_dn.bv_len != 0 ) {
309 ber_len_t max = sockbuf_max_incoming;
310 ber_sockbuf_ctrl( conn->c_sb,
311 LBER_SB_OPT_SET_MAX_INCOMING, &max );
314 } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
315 conn->c_sasl_bind_in_progress = 1;
318 if ( conn->c_sasl_bind_mech ) {
319 free( conn->c_sasl_bind_mech );
320 conn->c_sasl_bind_mech = NULL;
322 conn->c_sasl_bind_in_progress = 0;
324 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
329 /* Not SASL, cancel any in-progress bind */
330 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
332 if ( conn->c_sasl_bind_mech != NULL ) {
333 free(conn->c_sasl_bind_mech);
334 conn->c_sasl_bind_mech = NULL;
336 conn->c_sasl_bind_in_progress = 0;
338 slap_sasl_reset( conn );
339 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
342 if ( method == LDAP_AUTH_SIMPLE ) {
343 /* accept "anonymous" binds */
344 if ( cred.bv_len == 0 || ndn.bv_len == 0 ) {
349 !( global_allows & SLAP_ALLOW_BIND_ANON_CRED ))
351 /* cred is not empty, disallow */
352 rc = LDAP_INVALID_CREDENTIALS;
354 } else if ( ndn.bv_len &&
355 !( global_allows & SLAP_ALLOW_BIND_ANON_DN ))
357 /* DN is not empty, disallow */
358 rc = LDAP_UNWILLING_TO_PERFORM;
359 text = "unwilling to allow anonymous bind with non-empty DN";
361 } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
363 rc = LDAP_INAPPROPRIATE_AUTH;
364 text = "anonymous bind disallowed";
367 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
371 * we already forced connection to "anonymous",
372 * just need to send success
374 send_ldap_result( conn, op, rc,
375 NULL, text, NULL, NULL );
377 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
378 "do_bind: conn %d v%d anonymous bind\n",
379 conn->c_connid, version ));
381 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
386 } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
387 /* disallow simple authentication */
388 rc = LDAP_UNWILLING_TO_PERFORM;
389 text = "unwilling to perform simple authentication";
391 send_ldap_result( conn, op, rc,
392 NULL, text, NULL, NULL );
394 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
395 "do_bind: conn %d v%d simple bind(%s) disallowed\n",
396 conn->c_connid, version, ndn.bv_val ));
398 Debug( LDAP_DEBUG_TRACE,
399 "do_bind: v%d simple bind(%s) disallowed\n",
400 version, ndn.bv_val, 0 );
405 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
406 } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
407 if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
408 /* disallow simple authentication */
409 rc = LDAP_UNWILLING_TO_PERFORM;
410 text = "unwilling to perform Kerberos V4 bind";
412 send_ldap_result( conn, op, rc,
413 NULL, text, NULL, NULL );
415 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
416 "do_bind: conn %d v%d Kerberos V4 bind\n",
417 conn->c_connid, version ));
419 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
427 rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
428 text = "unknown authentication method";
430 send_ldap_result( conn, op, rc,
431 NULL, text, NULL, NULL );
433 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
434 "do_bind: conn %ld v%d unknown authentication method (%ld)\n",
435 conn->c_connid, version, method ));
437 Debug( LDAP_DEBUG_TRACE,
438 "do_bind: v%d unknown authentication method (%ld)\n",
439 version, method, 0 );
445 * We could be serving multiple database backends. Select the
446 * appropriate one, or send a referral to our "referral server"
447 * if we don't hold it.
450 if ( (be = select_backend( &ndn, 0, 0 )) == NULL ) {
451 if ( default_referral ) {
452 BVarray ref = referral_rewrite( default_referral,
453 NULL, &pdn, LDAP_SCOPE_DEFAULT );
455 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
456 NULL, NULL, ref ? ref : default_referral, NULL );
461 /* noSuchObject is not allowed to be returned by bind */
462 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
463 NULL, NULL, NULL, NULL );
469 /* check restrictions */
470 rc = backend_check_restrictions( be, conn, op, NULL, &text );
471 if( rc != LDAP_SUCCESS ) {
472 send_ldap_result( conn, op, rc,
473 NULL, text, NULL, NULL );
477 conn->c_authz_backend = be;
482 struct berval edn = { 0, NULL };
484 /* deref suffix alias if appropriate */
485 suffix_alias( be, &ndn );
487 ret = (*be->be_bind)( be, conn, op,
488 &pdn, &ndn, method, &cred, &edn );
491 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
496 ber_dupbv( &conn->c_dn, &pdn );
506 if( conn->c_dn.bv_len != 0 ) {
507 ber_len_t max = sockbuf_max_incoming;
508 ber_sockbuf_ctrl( conn->c_sb,
509 LBER_SB_OPT_SET_MAX_INCOMING, &max );
513 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
514 "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n",
515 conn->c_connid, version, conn->c_cdn.bv_val, conn->c_dn.bv_val ));
517 Debug( LDAP_DEBUG_TRACE,
518 "do_bind: v%d bind: \"%s\" to \"%s\"\n",
519 version, conn->c_cdn.bv_val, conn->c_dn.bv_val );
522 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
524 /* send this here to avoid a race condition */
525 send_ldap_result( conn, op, LDAP_SUCCESS,
526 NULL, NULL, NULL, NULL );
528 } else if (edn.bv_val != NULL) {
533 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
534 NULL, "operation not supported within namingContext",
539 if( pdn.bv_val != NULL ) {
542 if( ndn.bv_val != NULL ) {
545 if ( mech != NULL ) {