1/* bind.cpp - ndb backend bind routine */
2/* OpenLDAP: pkg/ldap/servers/slapd/back-ndb/bind.cpp,v 1.3.2.3 2010/04/13 20:23:34 kurt Exp */
3/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 2008-2010 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16/* ACKNOWLEDGEMENTS:
17 * This work was initially developed by Howard Chu for inclusion
18 * in OpenLDAP Software. This work was sponsored by MySQL.
19 */
20
21#include "portable.h"
22
23#include <stdio.h>
24#include <ac/string.h>
25#include <ac/unistd.h>
26
27#include "back-ndb.h"
28
29extern "C" int
30ndb_back_bind( Operation *op, SlapReply *rs )
31{
32	struct ndb_info *ni = (struct ndb_info *) op->o_bd->be_private;
33	Entry		e = {0};
34	Attribute	*a;
35
36	AttributeDescription *password = slap_schema.si_ad_userPassword;
37
38	NdbArgs NA;
39
40	Debug( LDAP_DEBUG_ARGS,
41		"==> " LDAP_XSTRING(ndb_back_bind) ": dn: %s\n",
42		op->o_req_dn.bv_val, 0, 0);
43
44	/* allow noauth binds */
45	switch ( be_rootdn_bind( op, NULL ) ) {
46	case SLAP_CB_CONTINUE:
47		break;
48
49	default:
50		return rs->sr_err;
51	}
52
53	/* Get our NDB handle */
54	rs->sr_err = ndb_thread_handle( op, &NA.ndb );
55
56	e.e_name = op->o_req_dn;
57	e.e_nname = op->o_req_ndn;
58	NA.e = &e;
59
60dn2entry_retry:
61	NA.txn = NA.ndb->startTransaction();
62	rs->sr_text = NULL;
63	if( !NA.txn ) {
64		Debug( LDAP_DEBUG_TRACE,
65			LDAP_XSTRING(ndb_back_bind) ": startTransaction failed: %s (%d)\n",
66			NA.ndb->getNdbError().message, NA.ndb->getNdbError().code, 0 );
67		rs->sr_err = LDAP_OTHER;
68		rs->sr_text = "internal error";
69		goto done;
70	}
71
72	/* get entry */
73	{
74		NdbRdns rdns;
75		rdns.nr_num = 0;
76		NA.rdns = &rdns;
77		NA.ocs = NULL;
78		rs->sr_err = ndb_entry_get_info( op, &NA, 0, NULL );
79	}
80	switch(rs->sr_err) {
81	case 0:
82		break;
83	case LDAP_NO_SUCH_OBJECT:
84		rs->sr_err = LDAP_INVALID_CREDENTIALS;
85		goto done;
86	case LDAP_BUSY:
87		rs->sr_text = "ldap_server_busy";
88		goto done;
89#if 0
90	case DB_LOCK_DEADLOCK:
91	case DB_LOCK_NOTGRANTED:
92		goto dn2entry_retry;
93#endif
94	default:
95		rs->sr_err = LDAP_OTHER;
96		rs->sr_text = "internal error";
97		goto done;
98	}
99
100	rs->sr_err = ndb_entry_get_data( op, &NA, 0 );
101	ber_bvarray_free_x( NA.ocs, op->o_tmpmemctx );
102	ber_dupbv( &op->oq_bind.rb_edn, &e.e_name );
103
104	/* check for deleted */
105	if ( is_entry_subentry( &e ) ) {
106		/* entry is an subentry, don't allow bind */
107		Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
108			0, 0 );
109		rs->sr_err = LDAP_INVALID_CREDENTIALS;
110		goto done;
111	}
112
113	if ( is_entry_alias( &e ) ) {
114		/* entry is an alias, don't allow bind */
115		Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
116		rs->sr_err = LDAP_INVALID_CREDENTIALS;
117		goto done;
118	}
119
120	if ( is_entry_referral( &e ) ) {
121		Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
122			0, 0 );
123		rs->sr_err = LDAP_INVALID_CREDENTIALS;
124		goto done;
125	}
126
127	switch ( op->oq_bind.rb_method ) {
128	case LDAP_AUTH_SIMPLE:
129		a = attr_find( e.e_attrs, password );
130		if ( a == NULL ) {
131			rs->sr_err = LDAP_INVALID_CREDENTIALS;
132			goto done;
133		}
134
135		if ( slap_passwd_check( op, &e, a, &op->oq_bind.rb_cred,
136					&rs->sr_text ) != 0 )
137		{
138			/* failure; stop front end from sending result */
139			rs->sr_err = LDAP_INVALID_CREDENTIALS;
140			goto done;
141		}
142
143		rs->sr_err = 0;
144		break;
145
146	default:
147		assert( 0 ); /* should not be reachable */
148		rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
149		rs->sr_text = "authentication method not supported";
150	}
151
152done:
153	NA.txn->close();
154	if ( e.e_attrs ) {
155		attrs_free( e.e_attrs );
156		e.e_attrs = NULL;
157	}
158	if ( rs->sr_err ) {
159		send_ldap_result( op, rs );
160	}
161	/* front end will send result on success (rs->sr_err==0) */
162	return rs->sr_err;
163}
164