include/functions.inc.php

@@ -319,4 +319,61 @@ function checkalias($alias)
 		return false;
 
 }
+
+// ****************************************************************
+// * Prueft ob im LDAP ein User mit diesem Passwort existiert
+// ****************************************************************
+function checkldapuser($username,$password)
+{
+	if($connect=@ldap_connect(LDAP_SERVER))
+	{ 
+	    // bind to ldap connection
+	    if(($bind=@ldap_bind($connect)) == false)
+	    {
+			print "bind:__FAILED__<br>\n";
+			return false;
+	    }
+	
+	    // search for user
+	    if (($res_id = ldap_search( $connect, LDAP_BASE_DN, "uid=$username")) == false) 
+	    {
+			print "failure: search in LDAP-tree failed<br>";
+			return false;
+	    }
+	
+	    if (ldap_count_entries($connect, $res_id) != 1) 
+	    {
+			print "failure: username $username found more than once<br>\n";
+			return false;
+	    }
+	
+	    if (( $entry_id = ldap_first_entry($connect, $res_id))== false) 
+	    {
+			print "failur: entry of searchresult couln't be fetched<br>\n";
+			return false;
+	    }
+	
+		if (( $user_dn = ldap_get_dn($connect, $entry_id)) == false) 
+		{
+			print "failure: user-dn coulnd't be fetched<br>\n";
+			return false;
+	    }
+	
+	    /* Authentifizierung des User */
+	    if (($link_id = @ldap_bind($connect, $user_dn, $password)) == false) 
+	    {
+			return false;
+	    }
+	
+		return true;
+		@ldap_close($connect);
+	}
+	else
+	{
+		// no conection to ldap server
+		echo "no connection to '$ldap_server'<br>\n";
+	}
+	@ldap_close($connect);
+	return(false);
+}
 ?>