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>
24 extern Backend *select_backend();
25 extern char *suffixAlias();
27 extern char *default_referral;
35 BerElement *ber = op->o_ber;
36 int version, method, len;
42 Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
45 * Parse the bind request. It looks like this:
47 * BindRequest ::= SEQUENCE {
48 * version INTEGER, -- version
49 * name DistinguishedName, -- dn
50 * authentication CHOICE {
51 * simple [0] OCTET STRING -- passwd
52 * krbv42ldap [1] OCTET STRING
53 * krbv42dsa [1] OCTET STRING
60 * in version 3.0 there is an extra SEQUENCE tag after the
61 * BindRequest SEQUENCE tag.
66 unsigned long tlen, ttag;
69 ttag = ber_skip_tag( &tber, &tlen );
70 if ( ber_peek_tag( &tber, &tlen ) == LBER_SEQUENCE ) {
71 Debug( LDAP_DEBUG_ANY, "version 3.0 detected\n", 0, 0, 0 );
73 rc = ber_scanf(ber, "{{iato}}", &version, &dn, &method, &cred);
75 rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
79 rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
81 if ( rc == LBER_ERROR ) {
82 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
83 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 */
106 Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
107 conn->c_connid, op->o_opid, dn, method, 0 );
109 if ( version != LDAP_VERSION2 ) {
113 if ( cred.bv_val != NULL ) {
117 Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
118 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
119 "version not supported" );
123 Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
124 version, dn, method );
126 /* accept null binds */
127 if ( dn == NULL || *dn == '\0' ) {
131 if ( cred.bv_val != NULL ) {
135 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
140 * We could be serving multiple database backends. Select the
141 * appropriate one, or send a referral to our "referral server"
142 * if we don't hold it.
145 if ( (be = select_backend( dn )) == NULL ) {
147 if ( cred.bv_val != NULL ) {
150 if ( cred.bv_len == 0 ) {
151 send_ldap_result( conn, op, LDAP_SUCCESS,
153 } else if ( default_referral && *default_referral ) {
154 send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
155 NULL, default_referral );
157 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
158 NULL, default_referral );
164 dn = suffixAlias ( dn, op, be );
166 if ( be->be_bind != NULL ) {
167 if ( (*be->be_bind)( be, conn, op, dn, method, &cred ) == 0 ) {
168 pthread_mutex_lock( &conn->c_dnmutex );
169 if ( conn->c_dn != NULL ) {
172 conn->c_dn = strdup( dn );
173 pthread_mutex_unlock( &conn->c_dnmutex );
175 /* send this here to avoid a race condition */
176 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
179 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
180 "Function not implemented" );
184 if ( cred.bv_val != NULL ) {