File	Doc	Category	Size	Date	Package
StreamBlockCipher.java	API Doc	Azureus 3.0.3.4	2871	Tue Jun 08 05:12:58 BST 2004	org.bouncycastle.crypto

StreamBlockCipher

• java.lang.Object

Fields Summary
private BlockCipher	cipher
private byte[]	oneByte

Constructors Summary
public StreamBlockCipher(BlockCipher cipher) basic constructor. param cipher the block cipher to be wrapped. exception IllegalArgumentException if the cipher has a block size other than one. if (cipher.getBlockSize() != 1) { throw new IllegalArgumentException("block cipher block size != 1."); } this.cipher = cipher;

Methods Summary
public java.lang.String	getAlgorithmName() return the name of the algorithm we are wrapping. return the name of the algorithm we are wrapping. return cipher.getAlgorithmName();
public void	init(boolean forEncryption, CipherParameters params) initialise the underlying cipher. param forEncryption true if we are setting up for encryption, false otherwise. param param the necessary parameters for the underlying cipher to be initialised. cipher.init(forEncryption, params);
public void	processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) process a block of bytes from in putting the result into out. param in the input byte array. param inOff the offset into the in array where the data to be processed starts. param len the number of bytes to be processed. param out the output buffer the processed bytes go into. param outOff the offset into the output byte array the processed data stars at. exception DataLengthException if the output buffer is too small. if (outOff + len > out.length) { throw new DataLengthException("output buffer too small in processBytes()"); } for (int i = 0; i != len; i++) { cipher.processBlock(in, inOff + i, out, outOff + i); }
public void	reset() reset the underlying cipher. This leaves it in the same state it was at after the last init (if there was one). cipher.reset();
public byte	returnByte(byte in) encrypt/decrypt a single byte returning the result. param in the byte to be processed. return the result of processing the input byte. oneByte[0] = in; cipher.processBlock(oneByte, 0, oneByte, 0); return oneByte[0];