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;
37 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
40 * Parse the bind request. It looks like this:
42 * BindRequest ::= SEQUENCE {
43 * version INTEGER, -- version
44 * name DistinguishedName, -- dn
45 * authentication CHOICE {
46 * simple [0] OCTET STRING -- passwd
47 * krbv42ldap [1] OCTET STRING
48 * krbv42dsa [1] OCTET STRING
55 * in version 3.0 there is an extra SEQUENCE tag after the
56 * BindRequest SEQUENCE tag.
61 unsigned long tlen, ttag;
63 tber = ber_dup( op->o_ber );
64 ttag = ber_skip_tag( tber, &tlen );
65 if ( ber_peek_tag( tber, &tlen ) == LBER_SEQUENCE ) {
66 Debug( LDAP_DEBUG_ANY, "bind: version 3.0 detected\n", 0, 0, 0 );
68 rc = ber_scanf(ber, "{{iato}}", &version, &cdn, &method, &cred);
70 rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred );
76 rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred );
79 if ( rc == LBER_ERROR ) {
80 Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
81 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
86 if ( conn->c_version == 30 ) {
88 case LDAP_AUTH_SIMPLE_30:
89 method = LDAP_AUTH_SIMPLE;
92 case LDAP_AUTH_KRBV41_30:
93 method = LDAP_AUTH_KRBV41;
95 case LDAP_AUTH_KRBV42_30:
96 method = LDAP_AUTH_KRBV42;
101 #endif /* compat30 */
103 Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
104 version, cdn, method );
106 ndn = dn_normalize_case( ch_strdup( cdn ) );
108 Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
109 conn->c_connid, op->o_opid, ndn, method, 0 );
111 if ( version != LDAP_VERSION2 ) {
118 if ( cred.bv_val != NULL ) {
122 Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
123 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
124 "version not supported" );
128 /* accept null binds */
129 if ( ndn == NULL || *ndn == '\0' ) {
136 if ( cred.bv_val != NULL ) {
140 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
142 conn->c_protocol = version;
144 if ( conn->c_cdn != NULL ) {
149 if ( conn->c_dn != NULL ) {
154 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
156 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
161 * We could be serving multiple database backends. Select the
162 * appropriate one, or send a referral to our "referral server"
163 * if we don't hold it.
166 if ( (be = select_backend( ndn )) == NULL ) {
169 if ( cred.bv_val != NULL ) {
172 if ( cred.bv_len == 0 ) {
173 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
175 conn->c_protocol = version;
177 if ( conn->c_cdn != NULL ) {
182 if ( conn->c_dn != NULL ) {
187 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
189 send_ldap_result( conn, op, LDAP_SUCCESS,
191 } else if ( default_referral && *default_referral ) {
192 send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
193 NULL, default_referral );
195 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
196 NULL, default_referral );
205 ndn = suffixAlias( ndn, op, be );
207 if ( (*be->be_bind)( be, conn, op, ndn, method, &cred, &edn ) == 0 ) {
208 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
210 conn->c_protocol = version;
212 if ( conn->c_cdn != NULL ) {
219 if ( conn->c_dn != NULL ) {
230 Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
231 conn->c_cdn, conn->c_dn, method );
233 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
235 /* send this here to avoid a race condition */
236 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
238 } else if (edn != NULL) {
243 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
244 "Function not implemented" );
253 if ( cred.bv_val != NULL ) {