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;
39 struct berval mech = { 0, NULL };
40 struct berval dn = { 0, NULL };
41 struct berval pdn = { 0, NULL };
42 struct berval ndn = { 0, NULL };
43 struct berval edn = { 0, NULL };
45 int rc = LDAP_SUCCESS;
47 struct berval cred = { 0, NULL };
51 LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
52 "do_bind: conn %d\n", conn->c_connid ));
54 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
58 * Force to connection to "anonymous" until bind succeeds.
60 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
61 connection2anonymous( conn );
62 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
64 if ( op->o_dn.bv_val != NULL ) {
65 free( op->o_dn.bv_val );
66 op->o_dn.bv_val = ch_strdup( "" );
70 if ( op->o_ndn.bv_val != NULL ) {
71 free( op->o_ndn.bv_val );
72 op->o_ndn.bv_val = ch_strdup( "" );
77 * Parse the bind request. It looks like this:
79 * BindRequest ::= SEQUENCE {
80 * version INTEGER, -- version
81 * name DistinguishedName, -- dn
82 * authentication CHOICE {
83 * simple [0] OCTET STRING -- passwd
84 * krbv42ldap [1] OCTET STRING
85 * krbv42dsa [2] OCTET STRING
86 * SASL [3] SaslCredentials
90 * SaslCredentials ::= SEQUENCE {
91 * mechanism LDAPString,
92 * credentials OCTET STRING OPTIONAL
96 tag = ber_scanf( ber, "{imt" /*}*/, &version, &dn, &method );
98 if ( tag == LBER_ERROR ) {
100 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
101 "do_bind: conn %d ber_scanf failed\n", conn->c_connid ));
103 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
105 send_ldap_disconnect( conn, op,
106 LDAP_PROTOCOL_ERROR, "decoding error" );
111 op->o_protocol = version;
113 if( method != LDAP_AUTH_SASL ) {
114 tag = ber_scanf( ber, /*{*/ "m}", &cred );
117 tag = ber_scanf( ber, "{o" /*}*/, &mech );
119 if ( tag != LBER_ERROR ) {
121 tag = ber_peek_tag( ber, &len );
123 if ( tag == LDAP_TAG_LDAPCRED ) {
124 tag = ber_scanf( ber, "m", &cred );
126 tag = LDAP_TAG_LDAPCRED;
131 if ( tag != LBER_ERROR ) {
132 tag = ber_scanf( ber, /*{{*/ "}}" );
137 if ( tag == LBER_ERROR ) {
138 send_ldap_disconnect( conn, op,
141 rc = SLAPD_DISCONNECT;
145 if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
147 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
148 "do_bind: conn %d get_ctrls failed\n", conn->c_connid ));
150 Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
155 rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
156 if ( rc != LDAP_SUCCESS ) {
158 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
159 "do_bind: conn %d invalid dn (%s)\n",
160 conn->c_connid, dn.bv_val ));
162 Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n",
165 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
166 "invalid DN", NULL, NULL );
170 if( method == LDAP_AUTH_SASL ) {
172 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
173 "do_sasl_bind: conn %d dn (%s) mech %s\n", conn->c_connid,
174 pdn.bv_val, mech.bv_val ));
176 Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
177 pdn.bv_val, mech.bv_val, NULL );
182 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
183 "do_bind: conn %d version=%ld dn=\"%s\" method=%ld\n",
184 conn->c_connid, (unsigned long) version,
185 pdn.bv_val, (unsigned long)method ));
187 Debug( LDAP_DEBUG_TRACE,
188 "do_bind: version=%ld dn=\"%s\" method=%ld\n",
189 (unsigned long) version,
190 pdn.bv_val, (unsigned long) method );
194 Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
195 op->o_connid, op->o_opid, pdn.bv_val, (unsigned long) method, 0 );
197 if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
199 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
200 "do_bind: conn %d unknown version = %ld\n",
201 conn->c_connid, (unsigned long)version ));
203 Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
204 (unsigned long) version, 0, 0 );
206 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
207 NULL, "requested protocol version not supported", NULL, NULL );
210 } else if (!( global_allows & SLAP_ALLOW_BIND_V2 ) &&
211 version < LDAP_VERSION3 )
213 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
214 NULL, "requested protocol version not allowed", NULL, NULL );
218 /* we set connection version regardless of whether bind succeeds
221 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
222 conn->c_protocol = version;
223 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
225 /* check for inappropriate controls */
226 if( get_manageDSAit( op ) == SLAP_CRITICAL_CONTROL ) {
227 send_ldap_result( conn, op,
228 rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION,
229 NULL, "manageDSAit control inappropriate",
234 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.bv_len == 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.bv_val, &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((ber_bvcmp(&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;
286 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 ) {
295 if( edn.bv_len != 0 ) {
296 /* edn is always normalized already */
297 ber_dupbv( &conn->c_ndn, &conn->c_dn );
299 conn->c_authmech = conn->c_sasl_bind_mech;
300 conn->c_sasl_bind_mech.bv_val = NULL;
301 conn->c_sasl_bind_mech.bv_len = 0;
302 conn->c_sasl_bind_in_progress = 0;
304 conn->c_sasl_ssf = ssf;
305 if( ssf > conn->c_ssf ) {
309 if( conn->c_dn.bv_len != 0 ) {
310 ber_len_t max = sockbuf_max_incoming;
311 ber_sockbuf_ctrl( conn->c_sb,
312 LBER_SB_OPT_SET_MAX_INCOMING, &max );
315 } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
316 conn->c_sasl_bind_in_progress = 1;
319 if ( conn->c_sasl_bind_mech.bv_val ) {
320 free( conn->c_sasl_bind_mech.bv_val );
321 conn->c_sasl_bind_mech.bv_val = NULL;
322 conn->c_sasl_bind_mech.bv_len = 0;
324 conn->c_sasl_bind_in_progress = 0;
326 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
331 /* Not SASL, cancel any in-progress bind */
332 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
334 if ( conn->c_sasl_bind_mech.bv_val != NULL ) {
335 free(conn->c_sasl_bind_mech.bv_val);
336 conn->c_sasl_bind_mech.bv_val = NULL;
337 conn->c_sasl_bind_mech.bv_len = 0;
339 conn->c_sasl_bind_in_progress = 0;
341 slap_sasl_reset( conn );
342 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
345 if ( method == LDAP_AUTH_SIMPLE ) {
346 /* accept "anonymous" binds */
347 if ( cred.bv_len == 0 || ndn.bv_len == 0 ) {
352 !( global_allows & SLAP_ALLOW_BIND_ANON_CRED ))
354 /* cred is not empty, disallow */
355 rc = LDAP_INVALID_CREDENTIALS;
357 } else if ( ndn.bv_len &&
358 !( global_allows & SLAP_ALLOW_BIND_ANON_DN ))
360 /* DN is not empty, disallow */
361 rc = LDAP_UNWILLING_TO_PERFORM;
362 text = "unwilling to allow anonymous bind with non-empty DN";
364 } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
366 rc = LDAP_INAPPROPRIATE_AUTH;
367 text = "anonymous bind disallowed";
370 rc = backend_check_restrictions( NULL, conn, op, mech.bv_val, &text );
374 * we already forced connection to "anonymous",
375 * just need to send success
377 send_ldap_result( conn, op, rc,
378 NULL, text, NULL, NULL );
380 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
381 "do_bind: conn %d v%d anonymous bind\n",
382 conn->c_connid, version ));
384 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
389 } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
390 /* disallow simple authentication */
391 rc = LDAP_UNWILLING_TO_PERFORM;
392 text = "unwilling to perform simple authentication";
394 send_ldap_result( conn, op, rc,
395 NULL, text, NULL, NULL );
397 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
398 "do_bind: conn %d v%d simple bind(%s) disallowed\n",
399 conn->c_connid, version, ndn.bv_val ));
401 Debug( LDAP_DEBUG_TRACE,
402 "do_bind: v%d simple bind(%s) disallowed\n",
403 version, ndn.bv_val, 0 );
408 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
409 } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
410 if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
411 /* disallow simple authentication */
412 rc = LDAP_UNWILLING_TO_PERFORM;
413 text = "unwilling to perform Kerberos V4 bind";
415 send_ldap_result( conn, op, rc,
416 NULL, text, NULL, NULL );
418 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
419 "do_bind: conn %d v%d Kerberos V4 bind\n",
420 conn->c_connid, version ));
422 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
430 rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
431 text = "unknown authentication method";
433 send_ldap_result( conn, op, rc,
434 NULL, text, NULL, NULL );
436 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
437 "do_bind: conn %ld v%d unknown authentication method (%ld)\n",
438 conn->c_connid, version, method ));
440 Debug( LDAP_DEBUG_TRACE,
441 "do_bind: v%d unknown authentication method (%ld)\n",
442 version, method, 0 );
448 * We could be serving multiple database backends. Select the
449 * appropriate one, or send a referral to our "referral server"
450 * if we don't hold it.
453 if ( (be = select_backend( &ndn, 0, 0 )) == NULL ) {
454 if ( default_referral ) {
455 BerVarray ref = referral_rewrite( default_referral,
456 NULL, &pdn, LDAP_SCOPE_DEFAULT );
458 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
459 NULL, NULL, ref ? ref : default_referral, NULL );
461 ber_bvarray_free( ref );
464 /* noSuchObject is not allowed to be returned by bind */
465 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
466 NULL, NULL, NULL, NULL );
472 /* check restrictions */
473 rc = backend_check_restrictions( be, conn, op, NULL, &text );
474 if( rc != LDAP_SUCCESS ) {
475 send_ldap_result( conn, op, rc,
476 NULL, text, NULL, NULL );
480 conn->c_authz_backend = be;
485 /* deref suffix alias if appropriate */
486 suffix_alias( be, &ndn );
488 ret = (*be->be_bind)( be, conn, op,
489 &pdn, &ndn, method, &cred, &edn );
492 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
497 ber_dupbv( &conn->c_dn, &pdn );
507 if( conn->c_dn.bv_len != 0 ) {
508 ber_len_t max = sockbuf_max_incoming;
509 ber_sockbuf_ctrl( conn->c_sb,
510 LBER_SB_OPT_SET_MAX_INCOMING, &max );
514 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
515 "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n",
516 conn->c_connid, version, conn->c_cdn.bv_val, conn->c_dn.bv_val ));
518 Debug( LDAP_DEBUG_TRACE,
519 "do_bind: v%d bind: \"%s\" to \"%s\"\n",
520 version, conn->c_cdn.bv_val, conn->c_dn.bv_val );
523 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
525 /* send this here to avoid a race condition */
526 send_ldap_result( conn, op, LDAP_SUCCESS,
527 NULL, NULL, NULL, NULL );
529 } else if (edn.bv_val != NULL) {
534 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
535 NULL, "operation not supported within namingContext",
540 if( pdn.bv_val != NULL ) {
543 if( ndn.bv_val != NULL ) {
546 if ( mech.bv_val != NULL ) {