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;
49 LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY, "do_bind: conn %d\n", conn->c_connid ));
51 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
60 * Force to connection to "anonymous" until bind succeeds.
62 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
63 connection2anonymous( conn );
64 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
66 if ( op->o_dn != NULL ) {
68 op->o_dn = ch_strdup( "" );
71 if ( op->o_ndn != NULL ) {
73 op->o_ndn = 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, "{iat" /*}*/, &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, /*{*/ "o}", &cred );
117 tag = ber_scanf( ber, "{a" /*}*/, &mech );
119 if ( tag != LBER_ERROR ) {
121 tag = ber_peek_tag( ber, &len );
123 if ( tag == LDAP_TAG_LDAPCRED ) {
124 tag = ber_scanf( ber, "o", &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 ndn = ch_strdup( dn );
157 if ( dn_normalize( ndn ) == NULL ) {
159 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
160 "do_bind: conn %d invalid dn (%s)\n", conn->c_connid, dn ));
162 Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 );
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",
180 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
181 "do_bind: conn %d version=%ld dn=\"%s\" method=%ld\n",
182 conn->c_connid, (unsigned long) version, dn, (unsigned long)method ));
184 Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n",
185 (unsigned long) version, dn, (unsigned long) method );
189 Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
190 op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 );
192 if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
194 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
195 "do_bind: conn %d unknown version = %ld\n",
196 conn->c_connid, (unsigned long)version ));
198 Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
199 (unsigned long) version, 0, 0 );
201 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
202 NULL, "requested protocol version not supported", NULL, NULL );
205 } else if (( global_disallows & SLAP_DISALLOW_BIND_V2 ) &&
206 version < LDAP_VERSION3 )
208 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
209 NULL, "requested protocol version not allowed", NULL, NULL );
213 /* we set connection version regardless of whether bind succeeds
216 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
217 conn->c_protocol = version;
218 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
220 if ( method == LDAP_AUTH_SASL ) {
224 if ( version < LDAP_VERSION3 ) {
226 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
227 "do_bind: conn %d sasl with LDAPv%ld\n",
228 conn->c_connid, (unsigned long)version ));
230 Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
231 (unsigned long) version, 0, 0 );
233 send_ldap_disconnect( conn, op,
234 LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
235 rc = SLAPD_DISCONNECT;
239 if( mech == NULL || *mech == '\0' ) {
241 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
242 "do_bind: conn %d no SASL mechanism provided\n",
245 Debug( LDAP_DEBUG_ANY,
246 "do_bind: no sasl mechanism provided\n",
249 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
250 NULL, "no SASL mechanism provided", NULL, NULL );
254 /* check restrictions */
255 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
256 if( rc != LDAP_SUCCESS ) {
257 send_ldap_result( conn, op, rc,
258 NULL, text, NULL, NULL );
262 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
263 if ( conn->c_sasl_bind_in_progress ) {
264 if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) {
265 /* mechanism changed between bind steps */
266 slap_sasl_reset(conn);
269 conn->c_sasl_bind_mech = mech;
272 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
275 rc = slap_sasl_bind( conn, op, dn, ndn, &cred, &edn, &ssf );
277 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
278 if( rc == LDAP_SUCCESS ) {
280 conn->c_authmech = conn->c_sasl_bind_mech;
281 conn->c_sasl_bind_mech = NULL;
282 conn->c_sasl_bind_in_progress = 0;
284 conn->c_sasl_ssf = ssf;
285 if( ssf > conn->c_ssf ) {
289 if( conn->c_dn != NULL ) {
290 ber_len_t max = sockbuf_max_incoming;
291 ber_sockbuf_ctrl( conn->c_sb,
292 LBER_SB_OPT_SET_MAX_INCOMING, &max );
295 } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
296 conn->c_sasl_bind_in_progress = 1;
299 if ( conn->c_sasl_bind_mech ) {
300 free( conn->c_sasl_bind_mech );
301 conn->c_sasl_bind_mech = NULL;
303 conn->c_sasl_bind_in_progress = 0;
305 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
310 /* Not SASL, cancel any in-progress bind */
311 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
313 if ( conn->c_sasl_bind_mech != NULL ) {
314 free(conn->c_sasl_bind_mech);
315 conn->c_sasl_bind_mech = NULL;
317 conn->c_sasl_bind_in_progress = 0;
319 slap_sasl_reset( conn );
320 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
323 if ( method == LDAP_AUTH_SIMPLE ) {
324 /* accept "anonymous" binds */
325 if ( cred.bv_len == 0 || ndn == NULL || *ndn == '\0' ) {
330 ( global_disallows & SLAP_DISALLOW_BIND_ANON_CRED ))
332 /* cred is not empty, disallow */
333 rc = LDAP_INVALID_CREDENTIALS;
335 } else if ( ndn != NULL && *ndn != '\0' &&
336 ( global_disallows & SLAP_DISALLOW_BIND_ANON_DN ))
338 /* DN is not empty, disallow */
339 rc = LDAP_UNWILLING_TO_PERFORM;
340 text = "unwilling to allow anonymous bind with non-empty DN";
342 } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
344 rc = LDAP_INAPPROPRIATE_AUTH;
345 text = "anonymous bind disallowed";
348 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
352 * we already forced connection to "anonymous",
353 * just need to send success
355 send_ldap_result( conn, op, rc,
356 NULL, text, NULL, NULL );
358 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
359 "do_bind: conn %d v%d anonymous bind\n",
360 conn->c_connid, version ));
362 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
367 } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
368 /* disallow simple authentication */
369 rc = LDAP_UNWILLING_TO_PERFORM;
370 text = "unwilling to perform simple authentication";
372 send_ldap_result( conn, op, rc,
373 NULL, text, NULL, NULL );
375 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
376 "do_bind: conn %d v%d simple bind(%s) disallowed\n",
377 conn->c_connid, version, ndn ));
379 Debug( LDAP_DEBUG_TRACE,
380 "do_bind: v%d simple bind(%s) disallowed\n",
386 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
387 } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
388 if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
389 /* disallow simple authentication */
390 rc = LDAP_UNWILLING_TO_PERFORM;
391 text = "unwilling to perform Kerberos V4 bind";
393 send_ldap_result( conn, op, rc,
394 NULL, text, NULL, NULL );
396 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
397 "do_bind: conn %d v%d Kerberos V4 bind\n",
398 conn->c_connid, version ));
400 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
408 rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
409 text = "unknown authentication method";
411 send_ldap_result( conn, op, rc,
412 NULL, text, NULL, NULL );
414 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
415 "do_bind: conn %d v%d unknown authentication method (%d)\n",
416 conn->c_connid, version, method ));
418 Debug( LDAP_DEBUG_TRACE,
419 "do_bind: v%d unknown authentication method (%d)\n",
420 version, method, 0 );
426 * We could be serving multiple database backends. Select the
427 * appropriate one, or send a referral to our "referral server"
428 * if we don't hold it.
431 if ( (be = select_backend( ndn, 0 )) == NULL ) {
432 if ( default_referral ) {
433 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
434 NULL, NULL, default_referral, NULL );
437 /* noSuchObject is not allowed to be returned by bind */
438 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
439 NULL, NULL, NULL, NULL );
445 /* check restrictions */
446 rc = backend_check_restrictions( be, conn, op, NULL, &text );
447 if( rc != LDAP_SUCCESS ) {
448 send_ldap_result( conn, op, rc,
449 NULL, text, NULL, NULL );
453 conn->c_authz_backend = be;
460 /* deref suffix alias if appropriate */
461 ndn = suffix_alias( be, ndn );
463 ret = (*be->be_bind)( be, conn, op, dn, ndn,
464 method, &cred, &edn );
467 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
479 if( conn->c_dn != NULL ) {
480 ber_len_t max = sockbuf_max_incoming;
481 ber_sockbuf_ctrl( conn->c_sb,
482 LBER_SB_OPT_SET_MAX_INCOMING, &max );
486 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
487 "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n",
488 conn->c_connid, version, conn->c_cdn, conn->c_dn ));
490 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n",
491 version, conn->c_cdn, conn->c_dn );
494 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
496 /* send this here to avoid a race condition */
497 send_ldap_result( conn, op, LDAP_SUCCESS,
498 NULL, NULL, NULL, NULL );
500 } else if (edn != NULL) {
505 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
506 NULL, "operation not supported within namingContext", NULL, NULL );
516 if ( mech != NULL ) {
519 if ( cred.bv_val != NULL ) {