1 /* bind.c - decode an ldap bind operation and pass it to a backend db */
4 * Copyright 1998-1999 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>
35 BerElement *ber = op->o_ber;
42 int rc = LDAP_SUCCESS;
46 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
53 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
55 /* Force to connection to "anonymous" until bind succeeds.
56 * This may need to be relocated or done on a case by case basis
57 * to handle certain SASL mechanisms.
60 if ( conn->c_cdn != NULL ) {
65 if ( conn->c_dn != NULL ) {
70 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
72 if ( op->o_dn != NULL ) {
74 op->o_dn = ch_strdup( "" );
77 if ( op->o_ndn != NULL ) {
79 op->o_ndn = ch_strdup( "" );
83 * Parse the bind request. It looks like this:
85 * BindRequest ::= SEQUENCE {
86 * version INTEGER, -- version
87 * name DistinguishedName, -- dn
88 * authentication CHOICE {
89 * simple [0] OCTET STRING -- passwd
90 * krbv42ldap [1] OCTET STRING
91 * krbv42dsa [2] OCTET STRING
92 * SASL [3] SaslCredentials
96 * SaslCredentials ::= SEQUENCE {
97 * mechanism LDAPString,
98 * credentials OCTET STRING OPTIONAL
102 tag = ber_scanf( ber, "{iat" /*}*/, &version, &dn, &method );
104 if ( tag == LBER_ERROR ) {
105 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
106 send_ldap_disconnect( conn, op,
107 LDAP_PROTOCOL_ERROR, "decoding error" );
112 ndn = ch_strdup( dn );
114 if ( dn_normalize_case( ndn ) == NULL ) {
115 Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 );
116 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
117 "invalid DN", NULL, NULL );
121 op->o_protocol = version;
123 if( method != LDAP_AUTH_SASL ) {
124 tag = ber_scanf( ber, /*{*/ "o}", &cred );
127 tag = ber_scanf( ber, "{a" /*}*/, &mech );
129 if ( tag != LBER_ERROR ) {
131 tag = ber_peek_tag( ber, &len );
133 if ( tag == LDAP_TAG_LDAPCRED ) {
134 tag = ber_scanf( ber, "o", &cred );
137 if ( tag != LBER_ERROR ) {
138 tag = ber_scanf( ber, /*{{*/ "}}" );
143 if ( tag == LBER_ERROR ) {
144 send_ldap_disconnect( conn, op,
151 if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
152 Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
156 if( method == LDAP_AUTH_SASL ) {
157 Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
160 Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n",
161 (unsigned long) version, dn, (unsigned long) method );
164 Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
165 op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 );
167 if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
168 Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
169 (unsigned long) version, 0, 0 );
170 send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
171 NULL, "version not supported", NULL, NULL );
175 if ( method == LDAP_AUTH_SASL ) {
176 if ( version < LDAP_VERSION3 ) {
177 Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
178 (unsigned long) version, 0, 0 );
179 send_ldap_disconnect( conn, op,
180 LDAP_PROTOCOL_ERROR, "sasl bind requires LDAPv3" );
185 if( mech == NULL || *mech == '\0' ) {
186 Debug( LDAP_DEBUG_ANY,
187 "do_bind: no sasl mechanism provided\n",
189 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
190 NULL, "no sasl mechanism provided", NULL, NULL );
194 if( !charray_inlist( supportedSASLMechanisms, mech ) ) {
195 Debug( LDAP_DEBUG_ANY,
196 "do_bind: sasl mechanism=\"%s\" not supported.\n",
198 send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
199 NULL, "sasl mechanism not supported", NULL, NULL );
203 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
205 if ( conn->c_authmech != NULL ) {
206 assert( conn->c_bind_in_progress );
208 if((strcmp(conn->c_authmech, mech) != 0)) {
209 /* mechanism changed, cancel in progress bind */
210 conn->c_bind_in_progress = 0;
211 if( conn->c_authstate != NULL ) {
212 free(conn->c_authstate);
213 conn->c_authstate = NULL;
215 free(conn->c_authmech);
216 conn->c_authmech = NULL;
221 assert( !conn->c_bind_in_progress );
222 assert( conn->c_authmech == NULL );
223 assert( conn->c_authstate == NULL );
228 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
230 if ( conn->c_authmech != NULL ) {
231 assert( conn->c_bind_in_progress );
233 /* cancel in progress bind */
234 conn->c_bind_in_progress = 0;
236 if( conn->c_authstate != NULL ) {
237 free(conn->c_authstate);
238 conn->c_authstate = NULL;
240 free(conn->c_authmech);
241 conn->c_authmech = NULL;
245 conn->c_protocol = version;
246 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
248 /* accept null binds */
249 if ( ndn == NULL || *ndn == '\0' ) {
251 * we already forced connection to "anonymous", we just
252 * need to send success
254 send_ldap_result( conn, op, LDAP_SUCCESS,
255 NULL, NULL, NULL, NULL );
260 * We could be serving multiple database backends. Select the
261 * appropriate one, or send a referral to our "referral server"
262 * if we don't hold it.
265 if ( (be = select_backend( ndn )) == NULL ) {
266 if ( cred.bv_len == 0 ) {
267 send_ldap_result( conn, op, LDAP_SUCCESS,
268 NULL, NULL, NULL, NULL );
270 } else if ( default_referral ) {
271 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
272 NULL, NULL, default_referral, NULL );
275 send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
276 NULL, NULL, NULL, NULL );
286 /* deref suffix alias if appropriate */
287 ndn = suffix_alias( be, ndn );
289 if ( (*be->be_bind)( be, conn, op, ndn, method, mech, &cred, &edn ) == 0 ) {
290 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
302 Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
303 conn->c_cdn, conn->c_dn, method );
305 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
307 /* send this here to avoid a race condition */
308 send_ldap_result( conn, op, LDAP_SUCCESS,
309 NULL, NULL, NULL, NULL );
311 } else if (edn != NULL) {
316 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
317 NULL, "Function not implemented", NULL, NULL );
327 if ( mech != NULL ) {
330 if ( cred.bv_val != NULL ) {