SHA-256 Password Hashing

Hi!



I would like to know if SHA-256 Password hashing is available for SAMP 0.3.7 R1? I tried looking into the a_samp.inc but the native function wasn't there although it says in the wiki that it is available on 0.3.7 R1.



Is there any way I can reverse or transfer to a different password hashing method replacing SHA-256 without affecting the accounts??



I am planning on downgrading my server due to personal reasons / server needs.