是否可以使用PHP将预先散列的密码发送到Active Directory？

I'm trying to change user password with hashed password on web server:

$new["userPassword"] = '{md5}' . base64_encode(pack('H*', md5("CLEARTEXT")));        
ldap_modify($_LD_CONN, $cn, $new);

I had no luck with the above, but I can do with below code:

$new["unicodePwd"] = "CLEARTEXTPASS";       
ldap_modify($_LD_CONN, $cn, $new);

I can't find any valid document or resource except this question.

Thanks in advance.