org.bouncycastle.crypto

Interface StreamCipher

public interface StreamCipher

the interface stream ciphers conform to.
Method Summary
StringgetAlgorithmName()
Return the name of the algorithm the cipher implements.
voidinit(boolean forEncryption, CipherParameters params)
Initialise the cipher.
voidprocessBytes(byte[] in, int inOff, int len, byte[] out, int outOff)
process a block of bytes from in putting the result into out.
voidreset()
reset the cipher.
bytereturnByte(byte in)
encrypt/decrypt a single byte returning the result.

Method Detail

getAlgorithmName

public String getAlgorithmName()
Return the name of the algorithm the cipher implements.

Returns: the name of the algorithm the cipher implements.

init

public void init(boolean forEncryption, CipherParameters params)
Initialise the cipher.

Parameters: forEncryption if true the cipher is initialised for encryption, if false for decryption. params the key and other data required by the cipher.

Throws: IllegalArgumentException if the params argument is inappropriate.

processBytes

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.

Parameters: in the input byte array. inOff the offset into the in array where the data to be processed starts. len the number of bytes to be processed. out the output buffer the processed bytes go into. outOff the offset into the output byte array the processed data starts at.

Throws: DataLengthException if the output buffer is too small.

reset

public void reset()
reset the cipher. This leaves it in the same state it was at after the last init (if there was one).

returnByte

public byte returnByte(byte in)
encrypt/decrypt a single byte returning the result.

Parameters: in the byte to be processed.

Returns: the result of processing the input byte.