001    package org.bouncycastle.crypto;
002    
003    public interface StreamCipher
004    {
005        /**
006         * Encrypt/decrypt a single byte, returning the result.
007         */
008        byte returnByte(byte var1);
009    
010        void func_74850_a(byte[] var1, int var2, int var3, byte[] var4, int var5) throws DataLengthException;
011    }