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ldap_connect> <ldap_close
Last updated: Fri, 13 Nov 2009

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ldap_compare

(PHP 4 >= 4.0.2, PHP 5)

ldap_compare指定した DN のエントリで見付かった属性の値を比較する

説明

mixed ldap_compare ( resource $link_identifier , string $dn , string $attribute , string $value )

属性 attribute の値 value を、指定した LDAP ディレクトリエントリの同じ属性の値と比較します。

パラメータ

link_identifier

ldap_connect() が返す LDAP リンク ID。

dn

LDAP エンティティの識別名。

attribute

属性の名前。

value

比較する値。

返り値

value がマッチする場合に TRUE、その他の場合に FALSE、エラーの場合に -1 を返します。

次の例は、指定したパスワードが DN の指定したエントリで定義された ものと一致するかどうかをチェックする方法を示しています。

例1 パスワード確認の例

<?php

$ds
=ldap_connect("localhost");  // LDAP サーバが同一ホストであると仮定

if ($ds) {

    
// バインド
    
if (ldap_bind($ds)) {

        
// データを準備
        
$dn "cn=Matti Meikku, ou=My Unit, o=My Company, c=FI";
        
$value "secretpassword";
        
$attr "password";

        
// 値を比較
        
$r=ldap_compare($ds$dn$attr$value);

        if (
$r === -1) {
            echo 
"Error: " ldap_error($ds);
        } elseif (
$r === true) {
            echo 
"Password correct.";
        } elseif (
$r === false) {
            echo 
"Wrong guess! Password incorrect.";
        }

    } else {
        echo 
"Unable to bind to LDAP server.";
    }

    
ldap_close($ds);

} else {
    echo 
"Unable to connect to LDAP server.";
}
?>

注意

警告

ldap_compare() では BINARY 値を比較することはできません!



ldap_connect> <ldap_close
Last updated: Fri, 13 Nov 2009
 
add a note add a note User Contributed Notes
ldap_compare
oudejans at zeelandnet dot nl
11-Apr-2005 09:10
With PHP 4.3.* is Password no longer a valid attribute.. try to use userPassword
chuck+ldap at 2006 dot snew dot com
06-Aug-2004 02:08
Just a side note that this is not how you'd ever AUTHENTICATE someone, just an example code.

The common way to authenticate is to get the users name, use search and perhaps selection to the user to get her DN (single value) then attempt to BIND to the ldapserver using that dn and the offered password.  If it works, then it's the right password.

Note that the password offered MUST NOT BE EMPTY or many LDAPs will presume you meant to authenticate anonymously and it will succeed, leaving you thinking it's the right password.
Brian Kerhin &lt;kerhin at bigfoot dot com&gt;
31-Jan-2001 11:13
Not probably, will.  With PHP 4.0.4 and openldap 1.2.9 this little script, even with the correct attributes for the password does not do the job.  Would superb if it did!
334647 at swin dot edu dot au
26-Oct-2000 11:06
Interesting example. Apart from the fact that very few people would allow comaprisions of the password attribute for security reasons. The attribute name of "password" does not match the usual schemas.

The usual method of user id + password verification is to attempt to bind using the supplied credentials.

Ldap compare on password values will probably fail with ns directroy server and openldap v2+ becuase of server support for password hashing.

ldap_connect> <ldap_close
Last updated: Fri, 13 Nov 2009
 
 
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