org.bouncycastle.crypto
Interface StreamCipher
- HC128Engine, HC256Engine, ISAACEngine, RC4Engine, Salsa20Engine, StreamBlockCipher
public interface StreamCipher
the interface stream ciphers conform to.
String | getAlgorithmName() - Return the name of the algorithm the cipher implements.
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void | init(boolean forEncryption, CipherParameters params) - Initialise the cipher.
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void | processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) - process a block of bytes from in putting the result into out.
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void | reset() - reset the cipher.
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byte | returnByte(byte in) - encrypt/decrypt a single byte returning the result.
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getAlgorithmName
public String getAlgorithmName()
Return the name of the algorithm the cipher implements.
- the name of the algorithm the cipher implements.
init
public void init(boolean forEncryption,
CipherParameters params)
throws IllegalArgumentException
Initialise the cipher.
forEncryption
- if true the cipher is initialised for
encryption, if false for decryption.params
- the key and other data required by the cipher.
processBytes
public void processBytes(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
throws DataLengthException
process a block of bytes from in putting the result into out.
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.
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.
in
- the byte to be processed.
- the result of processing the input byte.