1 /* bind.c - decode an ldap bind operation and pass it to a backend db */
4 * Copyright (c) 1995 Regents of the University of Michigan.
7 * Redistribution and use in source and binary forms are permitted
8 * provided that this notice is preserved and that due credit is given
9 * to the University of Michigan at Ann Arbor. The name of the University
10 * may not be used to endorse or promote products derived from this
11 * software without specific prior written permission. This software
12 * is provided ``as is'' without express or implied warranty.
19 #include <ac/string.h>
20 #include <ac/socket.h>
30 BerElement *ber = op->o_ber;
38 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
41 * Parse the bind request. It looks like this:
43 * BindRequest ::= SEQUENCE {
44 * version INTEGER, -- version
45 * name DistinguishedName, -- dn
46 * authentication CHOICE {
47 * simple [0] OCTET STRING -- passwd
48 * krbv42ldap [1] OCTET STRING
49 * krbv42dsa [1] OCTET STRING
56 * in version 3.0 there is an extra SEQUENCE tag after the
57 * BindRequest SEQUENCE tag.
62 unsigned long tlen, ttag;
64 tber = ber_dup( op->o_ber );
65 ttag = ber_skip_tag( tber, &tlen );
66 if ( ber_peek_tag( tber, &tlen ) == LBER_SEQUENCE ) {
67 Debug( LDAP_DEBUG_ANY, "bind: version 3.0 detected\n", 0, 0, 0 );
69 rc = ber_scanf(ber, "{{iato}}", &version, &cdn, &method, &cred);
71 rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred );
77 rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred );
80 if ( rc == LBER_ERROR ) {
81 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
82 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
87 if ( conn->c_version == 30 ) {
89 case LDAP_AUTH_SIMPLE_30:
90 method = LDAP_AUTH_SIMPLE;
93 case LDAP_AUTH_KRBV41_30:
94 method = LDAP_AUTH_KRBV41;
96 case LDAP_AUTH_KRBV42_30:
97 method = LDAP_AUTH_KRBV42;
102 #endif /* compat30 */
104 Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
105 version, cdn, method );
107 ndn = dn_normalize_case( ch_strdup( cdn ) );
109 Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
110 conn->c_connid, op->o_opid, ndn, method, 0 );
112 if ( version != LDAP_VERSION2 ) {
119 if ( cred.bv_val != NULL ) {
123 Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
124 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
125 "version not supported" );
129 /* accept null binds */
130 if ( ndn == NULL || *ndn == '\0' ) {
137 if ( cred.bv_val != NULL ) {
141 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
143 conn->c_protocol = version;
145 if ( conn->c_cdn != NULL ) {
150 if ( conn->c_dn != NULL ) {
155 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
157 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
162 * We could be serving multiple database backends. Select the
163 * appropriate one, or send a referral to our "referral server"
164 * if we don't hold it.
167 if ( (be = select_backend( ndn )) == NULL ) {
170 if ( cred.bv_val != NULL ) {
173 if ( cred.bv_len == 0 ) {
174 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
176 conn->c_protocol = version;
178 if ( conn->c_cdn != NULL ) {
183 if ( conn->c_dn != NULL ) {
188 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
190 send_ldap_result( conn, op, LDAP_SUCCESS,
192 } else if ( default_referral && *default_referral ) {
193 send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
194 NULL, default_referral );
196 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
197 NULL, default_referral );
206 ndn = suffixAlias( ndn, op, be );
208 if ( (*be->be_bind)( be, conn, op, ndn, method, &cred, &edn ) == 0 ) {
209 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
211 conn->c_protocol = version;
213 if ( conn->c_cdn != NULL ) {
220 if ( conn->c_dn != NULL ) {
231 Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
232 conn->c_cdn, conn->c_dn, method );
234 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
236 /* send this here to avoid a race condition */
237 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
239 } else if (edn != NULL) {
244 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
245 "Function not implemented" );
254 if ( cred.bv_val != NULL ) {