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: u-mich v3.0 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,
88 if ( conn->c_version == 30 ) {
90 case LDAP_AUTH_SIMPLE_30:
91 method = LDAP_AUTH_SIMPLE;
94 case LDAP_AUTH_KRBV41_30:
95 method = LDAP_AUTH_KRBV41;
97 case LDAP_AUTH_KRBV42_30:
98 method = LDAP_AUTH_KRBV42;
103 #endif /* compat30 */
105 Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
106 version, cdn, method );
108 ndn = dn_normalize_case( ch_strdup( cdn ) );
110 Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
111 conn->c_connid, op->o_opid, ndn, method, 0 );
113 if ( version != LDAP_VERSION2 ) {
120 if ( cred.bv_val != NULL ) {
124 Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
125 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
126 "version not supported" );
130 /* accept null binds */
131 if ( ndn == NULL || *ndn == '\0' ) {
138 if ( cred.bv_val != NULL ) {
142 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
144 conn->c_protocol = version;
146 if ( conn->c_cdn != NULL ) {
151 if ( conn->c_dn != NULL ) {
156 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
158 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
163 * We could be serving multiple database backends. Select the
164 * appropriate one, or send a referral to our "referral server"
165 * if we don't hold it.
168 if ( (be = select_backend( ndn )) == NULL ) {
171 if ( cred.bv_val != NULL ) {
174 if ( cred.bv_len == 0 ) {
175 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
177 conn->c_protocol = version;
179 if ( conn->c_cdn != NULL ) {
184 if ( conn->c_dn != NULL ) {
189 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
191 send_ldap_result( conn, op, LDAP_SUCCESS,
193 } else if ( default_referral && *default_referral ) {
194 send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
195 NULL, default_referral );
197 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
198 NULL, default_referral );
207 ndn = suffixAlias( ndn, op, be );
209 if ( (*be->be_bind)( be, conn, op, ndn, method, &cred, &edn ) == 0 ) {
210 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
212 conn->c_protocol = version;
214 if ( conn->c_cdn != NULL ) {
221 if ( conn->c_dn != NULL ) {
232 Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
233 conn->c_cdn, conn->c_dn, method );
235 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
237 /* send this here to avoid a race condition */
238 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
240 } else if (edn != NULL) {
245 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
246 "Function not implemented" );
255 if ( cred.bv_val != NULL ) {