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.
17 #include <sys/types.h>
18 #include <sys/socket.h>
21 extern Backend *select_backend();
22 extern char *suffixAlias();
24 extern char *default_referral;
32 BerElement *ber = op->o_ber;
33 int version, method, len, rc;
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;
65 ttag = ber_skip_tag( &tber, &tlen );
66 if ( ber_peek_tag( &tber, &tlen ) == LBER_SEQUENCE ) {
67 Debug( LDAP_DEBUG_ANY, "version 3.0 detected\n", 0, 0, 0 );
69 rc = ber_scanf(ber, "{{iato}}", &version, &dn, &method, &cred);
71 rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
75 rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
77 if ( rc == LBER_ERROR ) {
78 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
79 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
84 if ( conn->c_version == 30 ) {
86 case LDAP_AUTH_SIMPLE_30:
87 method = LDAP_AUTH_SIMPLE;
90 case LDAP_AUTH_KRBV41_30:
91 method = LDAP_AUTH_KRBV41;
93 case LDAP_AUTH_KRBV42_30:
94 method = LDAP_AUTH_KRBV42;
102 Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
103 conn->c_connid, op->o_opid, dn, method, 0 );
105 if ( version != LDAP_VERSION2 ) {
109 if ( cred.bv_val != NULL ) {
113 Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
114 send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
115 "version not supported" );
119 Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
120 version, dn, method );
122 /* accept null binds */
123 if ( dn == NULL || *dn == '\0' ) {
127 if ( cred.bv_val != NULL ) {
131 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
136 * We could be serving multiple database backends. Select the
137 * appropriate one, or send a referral to our "referral server"
138 * if we don't hold it.
141 if ( (be = select_backend( dn )) == NULL ) {
143 if ( cred.bv_val != NULL ) {
146 if ( cred.bv_len == 0 ) {
147 send_ldap_result( conn, op, LDAP_SUCCESS,
149 } else if ( default_referral && *default_referral ) {
150 send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS,
151 NULL, default_referral );
153 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
154 NULL, default_referral );
160 dn = suffixAlias ( dn, op, be );
162 if ( be->be_bind != NULL ) {
163 if ( (*be->be_bind)( be, conn, op, dn, method, &cred ) == 0 ) {
164 pthread_mutex_lock( &conn->c_dnmutex );
165 if ( conn->c_dn != NULL ) {
168 conn->c_dn = strdup( dn );
169 pthread_mutex_unlock( &conn->c_dnmutex );
171 /* send this here to avoid a race condition */
172 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
175 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
176 "Function not implemented" );
180 if ( cred.bv_val != NULL ) {