Can the dbms_crypto package be used to decrypt a winzip file?

Question

I have a password protected winzip file. I know the password.
Is it possible to decrypt this file using dbms_crypto or is this not supported?
I have searched everywhere for the answer!
Please help :-)
Thanks

Answer 1

simple example...
create or replace and compile java source named unZip as
import java.io.ByteArrayOutputStream;
import java.util.zip.Inflater;
public class ByteArrayUnzip {
public byte[] decompressByteArray(byte[] bytes){
        ByteArrayOutputStream baos = null;
        Inflater inf = new Inflater();
        inf.setInput(bytes);
        baos = new ByteArrayOutputStream();
        byte[] temp = new byte[4*1024];
        try {
             while(!inf.finished())
                int size = inf.inflate(temp);
                baos.write(temp, 0, size);
        } catch (Exception e){
        } finally {
            try{
                if(baos != null) baos.close();
            } catch(Exception e){}
        return baos.toByteArray();
create or replace function unzip (p_buf in raw) return raw
as language java
name 'ByteArrayUnzip.decompressByteArray(byte[]) return byte[]';
declare
v_buf raw(2000);
v_res raw(2000); -- or blob maybe
begin
v_buf := <your data>
v_res := unzip(v_buf);
end;
hope it'll help