SSHA pwd encryption needed (and Blowfish not working)

Hello and first thank you for this great and useful module,

first of all i enabled php-mcrypt module on my server and selected "blowfish" in the LDAP User module admin page, (LDAP feeded with Drupal account info) but the passwords are written in clear text in the OpenLdap server (perhaps i missed another param ?)

Anyway i needed SSHA password encryption, i did not find a clean "drupal way" for overriding the function, so i ended replacing a line of code in the ldap_user.module :

function ldap_user_ldap_provision_pwd($action, $value = NULL, $reset = FALSE) {

...

if ($action == 'set') {

    //$current_user_pass = $value;  <-- commented this line and added below :

	$salt = pack("CCCC", mt_rand(), mt_rand(), mt_rand(), mt_rand());
	  $current_user_pass = "{SSHA}" . base64_encode(pack("H*", sha1($value . $salt)) . $salt);

...
}

That works, but is there a cleaner way to hook the ldap_user module to achieve this ?

As we can not override the ldap_user_ldap_provision_pwd function in a custom module (no hook_ldap_user_ldap_provision_pwd_alter ?)

Thanks and best wishes for this new year !