1 /* bind.cpp - ndb backend bind routine */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 2008-2021 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
29 extern "C" int
ndb_back_bind(Operation * op,SlapReply * rs)30 ndb_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 LDAP_SUCCESS:
47 /* frontend will send result */
48 return rs->sr_err = LDAP_SUCCESS;
49
50 default:
51 /* give the database a chance */
52 break;
53 }
54
55 /* Get our NDB handle */
56 rs->sr_err = ndb_thread_handle( op, &NA.ndb );
57
58 e.e_name = op->o_req_dn;
59 e.e_nname = op->o_req_ndn;
60 NA.e = &e;
61
62 dn2entry_retry:
63 NA.txn = NA.ndb->startTransaction();
64 rs->sr_text = NULL;
65 if( !NA.txn ) {
66 Debug( LDAP_DEBUG_TRACE,
67 LDAP_XSTRING(ndb_back_bind) ": startTransaction failed: %s (%d)\n",
68 NA.ndb->getNdbError().message, NA.ndb->getNdbError().code, 0 );
69 rs->sr_err = LDAP_OTHER;
70 rs->sr_text = "internal error";
71 goto done;
72 }
73
74 /* get entry */
75 {
76 NdbRdns rdns;
77 rdns.nr_num = 0;
78 NA.rdns = &rdns;
79 NA.ocs = NULL;
80 rs->sr_err = ndb_entry_get_info( op, &NA, 0, NULL );
81 }
82 switch(rs->sr_err) {
83 case 0:
84 break;
85 case LDAP_NO_SUCH_OBJECT:
86 rs->sr_err = LDAP_INVALID_CREDENTIALS;
87 goto done;
88 case LDAP_BUSY:
89 rs->sr_text = "ldap_server_busy";
90 goto done;
91 #if 0
92 case DB_LOCK_DEADLOCK:
93 case DB_LOCK_NOTGRANTED:
94 goto dn2entry_retry;
95 #endif
96 default:
97 rs->sr_err = LDAP_OTHER;
98 rs->sr_text = "internal error";
99 goto done;
100 }
101
102 rs->sr_err = ndb_entry_get_data( op, &NA, 0 );
103 ber_bvarray_free_x( NA.ocs, op->o_tmpmemctx );
104 ber_dupbv( &op->oq_bind.rb_edn, &e.e_name );
105
106 /* check for deleted */
107 if ( is_entry_subentry( &e ) ) {
108 /* entry is an subentry, don't allow bind */
109 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
110 0, 0 );
111 rs->sr_err = LDAP_INVALID_CREDENTIALS;
112 goto done;
113 }
114
115 if ( is_entry_alias( &e ) ) {
116 /* entry is an alias, don't allow bind */
117 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
118 rs->sr_err = LDAP_INVALID_CREDENTIALS;
119 goto done;
120 }
121
122 if ( is_entry_referral( &e ) ) {
123 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
124 0, 0 );
125 rs->sr_err = LDAP_INVALID_CREDENTIALS;
126 goto done;
127 }
128
129 switch ( op->oq_bind.rb_method ) {
130 case LDAP_AUTH_SIMPLE:
131 a = attr_find( e.e_attrs, password );
132 if ( a == NULL ) {
133 rs->sr_err = LDAP_INVALID_CREDENTIALS;
134 goto done;
135 }
136
137 if ( slap_passwd_check( op, &e, a, &op->oq_bind.rb_cred,
138 &rs->sr_text ) != 0 )
139 {
140 /* failure; stop front end from sending result */
141 rs->sr_err = LDAP_INVALID_CREDENTIALS;
142 goto done;
143 }
144
145 rs->sr_err = 0;
146 break;
147
148 default:
149 assert( 0 ); /* should not be reachable */
150 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
151 rs->sr_text = "authentication method not supported";
152 }
153
154 done:
155 NA.txn->close();
156 if ( e.e_attrs ) {
157 attrs_free( e.e_attrs );
158 e.e_attrs = NULL;
159 }
160 if ( rs->sr_err ) {
161 send_ldap_result( op, rs );
162 }
163 /* front end will send result on success (rs->sr_err==0) */
164 return rs->sr_err;
165 }
166