1 /* $NetBSD: bind.c,v 1.2 2020/08/11 13:15:40 christos Exp $ */ 2 3 /* bind.c - mdb backend bind routine */ 4 /* $OpenLDAP$ */ 5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 6 * 7 * Copyright 2000-2020 The OpenLDAP Foundation. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted only as authorized by the OpenLDAP 12 * Public License. 13 * 14 * A copy of this license is available in the file LICENSE in the 15 * top-level directory of the distribution or, alternatively, at 16 * <http://www.OpenLDAP.org/license.html>. 17 */ 18 19 #include <sys/cdefs.h> 20 __RCSID("$NetBSD: bind.c,v 1.2 2020/08/11 13:15:40 christos Exp $"); 21 22 #include "portable.h" 23 24 #include <stdio.h> 25 #include <ac/string.h> 26 #include <ac/unistd.h> 27 28 #include "back-mdb.h" 29 30 int 31 mdb_bind( Operation *op, SlapReply *rs ) 32 { 33 struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private; 34 Entry *e; 35 Attribute *a; 36 37 AttributeDescription *password = slap_schema.si_ad_userPassword; 38 39 MDB_txn *rtxn; 40 mdb_op_info opinfo = {{{0}}}, *moi = &opinfo; 41 42 Debug( LDAP_DEBUG_ARGS, 43 "==> " LDAP_XSTRING(mdb_bind) ": dn: %s\n", 44 op->o_req_dn.bv_val, 0, 0); 45 46 /* allow noauth binds */ 47 switch ( be_rootdn_bind( op, NULL ) ) { 48 case LDAP_SUCCESS: 49 /* frontend will send result */ 50 return rs->sr_err = LDAP_SUCCESS; 51 52 default: 53 /* give the database a chance */ 54 /* NOTE: this behavior departs from that of other backends, 55 * since the others, in case of password checking failure 56 * do not give the database a chance. If an entry with 57 * rootdn's name does not exist in the database the result 58 * will be the same. See ITS#4962 for discussion. */ 59 break; 60 } 61 62 rs->sr_err = mdb_opinfo_get(op, mdb, 1, &moi); 63 switch(rs->sr_err) { 64 case 0: 65 break; 66 default: 67 rs->sr_text = "internal error"; 68 send_ldap_result( op, rs ); 69 return rs->sr_err; 70 } 71 72 rtxn = moi->moi_txn; 73 74 /* get entry with reader lock */ 75 rs->sr_err = mdb_dn2entry( op, rtxn, NULL, &op->o_req_ndn, &e, NULL, 0 ); 76 77 switch(rs->sr_err) { 78 case MDB_NOTFOUND: 79 rs->sr_err = LDAP_INVALID_CREDENTIALS; 80 goto done; 81 case 0: 82 break; 83 case LDAP_BUSY: 84 rs->sr_text = "ldap_server_busy"; 85 goto done; 86 default: 87 rs->sr_err = LDAP_OTHER; 88 rs->sr_text = "internal error"; 89 goto done; 90 } 91 92 ber_dupbv( &op->oq_bind.rb_edn, &e->e_name ); 93 94 /* check for deleted */ 95 if ( is_entry_subentry( e ) ) { 96 /* entry is an subentry, don't allow bind */ 97 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0, 98 0, 0 ); 99 rs->sr_err = LDAP_INVALID_CREDENTIALS; 100 goto done; 101 } 102 103 if ( is_entry_alias( e ) ) { 104 /* entry is an alias, don't allow bind */ 105 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 ); 106 rs->sr_err = LDAP_INVALID_CREDENTIALS; 107 goto done; 108 } 109 110 if ( is_entry_referral( e ) ) { 111 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0, 112 0, 0 ); 113 rs->sr_err = LDAP_INVALID_CREDENTIALS; 114 goto done; 115 } 116 117 switch ( op->oq_bind.rb_method ) { 118 case LDAP_AUTH_SIMPLE: 119 a = attr_find( e->e_attrs, password ); 120 if ( a == NULL ) { 121 rs->sr_err = LDAP_INVALID_CREDENTIALS; 122 goto done; 123 } 124 125 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred, 126 &rs->sr_text ) != 0 ) 127 { 128 /* failure; stop front end from sending result */ 129 rs->sr_err = LDAP_INVALID_CREDENTIALS; 130 goto done; 131 } 132 133 rs->sr_err = 0; 134 break; 135 136 default: 137 assert( 0 ); /* should not be reachable */ 138 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED; 139 rs->sr_text = "authentication method not supported"; 140 } 141 142 done: 143 if ( moi == &opinfo ) { 144 mdb_txn_reset( moi->moi_txn ); 145 LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next ); 146 } else { 147 moi->moi_ref--; 148 } 149 /* free entry and reader lock */ 150 if( e != NULL ) { 151 mdb_entry_return( op, e ); 152 } 153 154 if ( rs->sr_err ) { 155 send_ldap_result( op, rs ); 156 if ( rs->sr_ref ) { 157 ber_bvarray_free( rs->sr_ref ); 158 rs->sr_ref = NULL; 159 } 160 } 161 /* front end will send result on success (rs->sr_err==0) */ 162 return rs->sr_err; 163 } 164