DerivationFunction.java revision e6bf3e8dfa2804891a82075cb469b736321b4827 
1package org.bouncycastle.crypto;
2
3/**
4 * base interface for general purpose byte derivation functions.
5 */
6public interface DerivationFunction
7{
8    public void init(DerivationParameters param);
9
10    /**
11     * return the message digest used as the basis for the function
12     */
13    public Digest getDigest();
14
15    public int generateBytes(byte[] out, int outOff, int len)
16        throws DataLengthException, IllegalArgumentException;
17}
18