Notice: crypt()

Notice: crypt(): No salt parameter was specified. You must use a randomly generated salt and a strong hash function to produce a secure hash. in

$submit 	= !empty($_POST['submit']) ? $_POST['submit'] : NULL;
	echo '<h1>Donner accès Partitions</h1>';

	if($submit) {
		$login  = trim($_POST["login"]);
		$passwd = trim($_POST["passwd"]);

		// Ecrire dans le fichier des mots de passe
		$hf = fopen("/home/cliquede/partitions/.htpasswd","a+");
		fwrite($hf,"$login:".crypt("$passwd")."\n");
		fclose($hf);
	}

	echo '<form name="setmdp" method="post" action="'.$_SERVER["PHP_SELF"].'" onsubmit="return verif();">';
	echo '<table cellspacing="0" cellpadding="0">';
	echo '<tr><td class="libel">login</td><td class="sais"><input type="text" name="login"></td></tr>';
	echo '<tr><td class="libel">password</td><td class="sais"><input type="text" name="passwd"></td></tr>';
	echo '<tr><td class="libel"> </td><td class="sais"><input type="submit" name="submit" value="Enregistrer" style="margin-top:5px"></td></tr>';
	echo '</table>';
	echo '</form>';