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;
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, "{iot" /*}*/, &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, /*{*/ "o}", &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, "o", &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 if ( method == LDAP_AUTH_SASL ) {
228 if ( version < LDAP_VERSION3 ) {
230 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
231 "do_bind: conn %d sasl with LDAPv%ld\n",
232 conn->c_connid, (unsigned long)version ));
234 Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
235 (unsigned long) version, 0, 0 );
237 send_ldap_disconnect( conn, op,
238 LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
239 rc = SLAPD_DISCONNECT;
243 if( mech == NULL || *mech == '\0' ) {
245 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
246 "do_bind: conn %d no SASL mechanism provided\n",
249 Debug( LDAP_DEBUG_ANY,
250 "do_bind: no sasl mechanism provided\n",
253 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
254 NULL, "no SASL mechanism provided", NULL, NULL );
258 /* check restrictions */
259 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
260 if( rc != LDAP_SUCCESS ) {
261 send_ldap_result( conn, op, rc,
262 NULL, text, NULL, NULL );
266 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
267 if ( conn->c_sasl_bind_in_progress ) {
268 if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) {
269 /* mechanism changed between bind steps */
270 slap_sasl_reset(conn);
273 conn->c_sasl_bind_mech = mech;
276 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
279 rc = slap_sasl_bind( conn, op,
283 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
284 if( rc == LDAP_SUCCESS ) {
285 conn->c_dn.bv_val = edn;
288 conn->c_dn.bv_len = strlen( edn );
289 dnNormalize( NULL, &conn->c_dn, &cndn );
293 conn->c_authmech = conn->c_sasl_bind_mech;
294 conn->c_sasl_bind_mech = NULL;
295 conn->c_sasl_bind_in_progress = 0;
297 conn->c_sasl_ssf = ssf;
298 if( ssf > conn->c_ssf ) {
302 if( conn->c_dn.bv_len != 0 ) {
303 ber_len_t max = sockbuf_max_incoming;
304 ber_sockbuf_ctrl( conn->c_sb,
305 LBER_SB_OPT_SET_MAX_INCOMING, &max );
308 } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
309 conn->c_sasl_bind_in_progress = 1;
312 if ( conn->c_sasl_bind_mech ) {
313 free( conn->c_sasl_bind_mech );
314 conn->c_sasl_bind_mech = NULL;
316 conn->c_sasl_bind_in_progress = 0;
318 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
323 /* Not SASL, cancel any in-progress bind */
324 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
326 if ( conn->c_sasl_bind_mech != NULL ) {
327 free(conn->c_sasl_bind_mech);
328 conn->c_sasl_bind_mech = NULL;
330 conn->c_sasl_bind_in_progress = 0;
332 slap_sasl_reset( conn );
333 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
336 if ( method == LDAP_AUTH_SIMPLE ) {
337 /* accept "anonymous" binds */
338 if ( cred.bv_len == 0 || ndn.bv_len == 0 ) {
343 !( global_allows & SLAP_ALLOW_BIND_ANON_CRED ))
345 /* cred is not empty, disallow */
346 rc = LDAP_INVALID_CREDENTIALS;
348 } else if ( ndn.bv_len &&
349 !( global_allows & SLAP_ALLOW_BIND_ANON_DN ))
351 /* DN is not empty, disallow */
352 rc = LDAP_UNWILLING_TO_PERFORM;
353 text = "unwilling to allow anonymous bind with non-empty DN";
355 } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
357 rc = LDAP_INAPPROPRIATE_AUTH;
358 text = "anonymous bind disallowed";
361 rc = backend_check_restrictions( NULL, conn, op, mech, &text );
365 * we already forced connection to "anonymous",
366 * just need to send success
368 send_ldap_result( conn, op, rc,
369 NULL, text, NULL, NULL );
371 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
372 "do_bind: conn %d v%d anonymous bind\n",
373 conn->c_connid, version ));
375 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
380 } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
381 /* disallow simple authentication */
382 rc = LDAP_UNWILLING_TO_PERFORM;
383 text = "unwilling to perform simple authentication";
385 send_ldap_result( conn, op, rc,
386 NULL, text, NULL, NULL );
388 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
389 "do_bind: conn %d v%d simple bind(%s) disallowed\n",
390 conn->c_connid, version, ndn.bv_val ));
392 Debug( LDAP_DEBUG_TRACE,
393 "do_bind: v%d simple bind(%s) disallowed\n",
394 version, ndn.bv_val, 0 );
399 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
400 } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
401 if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
402 /* disallow simple authentication */
403 rc = LDAP_UNWILLING_TO_PERFORM;
404 text = "unwilling to perform Kerberos V4 bind";
406 send_ldap_result( conn, op, rc,
407 NULL, text, NULL, NULL );
409 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
410 "do_bind: conn %d v%d Kerberos V4 bind\n",
411 conn->c_connid, version ));
413 Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
421 rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
422 text = "unknown authentication method";
424 send_ldap_result( conn, op, rc,
425 NULL, text, NULL, NULL );
427 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
428 "do_bind: conn %ld v%d unknown authentication method (%ld)\n",
429 conn->c_connid, version, method ));
431 Debug( LDAP_DEBUG_TRACE,
432 "do_bind: v%d unknown authentication method (%ld)\n",
433 version, method, 0 );
439 * We could be serving multiple database backends. Select the
440 * appropriate one, or send a referral to our "referral server"
441 * if we don't hold it.
444 if ( (be = select_backend( &ndn, 0, 0 )) == NULL ) {
445 if ( default_referral ) {
446 struct berval **ref = referral_rewrite( default_referral,
447 NULL, &pdn, LDAP_SCOPE_DEFAULT );
449 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
450 NULL, NULL, ref ? ref : default_referral, NULL );
455 /* noSuchObject is not allowed to be returned by bind */
456 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
457 NULL, NULL, NULL, NULL );
463 /* check restrictions */
464 rc = backend_check_restrictions( be, conn, op, NULL, &text );
465 if( rc != LDAP_SUCCESS ) {
466 send_ldap_result( conn, op, rc,
467 NULL, text, NULL, NULL );
471 conn->c_authz_backend = be;
476 struct berval edn = { 0, NULL };
478 /* deref suffix alias if appropriate */
479 suffix_alias( be, &ndn );
481 ret = (*be->be_bind)( be, conn, op,
482 &pdn, &ndn, method, &cred, &edn );
485 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
490 ber_dupbv( &conn->c_dn, &pdn );
492 conn->c_cdn = pdn.bv_val;
500 if( conn->c_dn.bv_len != 0 ) {
501 ber_len_t max = sockbuf_max_incoming;
502 ber_sockbuf_ctrl( conn->c_sb,
503 LBER_SB_OPT_SET_MAX_INCOMING, &max );
507 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
508 "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n",
509 conn->c_connid, version, conn->c_cdn, conn->c_dn.bv_val ));
511 Debug( LDAP_DEBUG_TRACE,
512 "do_bind: v%d bind: \"%s\" to \"%s\"\n",
513 version, conn->c_cdn, conn->c_dn.bv_val );
516 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
518 /* send this here to avoid a race condition */
519 send_ldap_result( conn, op, LDAP_SUCCESS,
520 NULL, NULL, NULL, NULL );
522 } else if (edn.bv_val != NULL) {
527 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
528 NULL, "operation not supported within namingContext",
534 if( pdn.bv_val != NULL ) {
537 if( ndn.bv_val != NULL ) {
540 if ( mech != NULL ) {
543 if ( cred.bv_val != NULL ) {