BlockCipher
public class NullEngine extends java.lang.Object implements BlockCipher
Modifier and Type | Field | Description |
---|---|---|
protected static int |
DEFAULT_BLOCK_SIZE |
Constructor | Description |
---|---|
NullEngine() |
Constructs a null engine with a block size of 1 byte.
|
NullEngine(int blockSize) |
Constructs a null engine with a specific block size.
|
Modifier and Type | Method | Description |
---|---|---|
java.lang.String |
getAlgorithmName() |
Return the name of the algorithm the cipher implements.
|
int |
getBlockSize() |
Return the block size for this cipher (in bytes).
|
void |
init(boolean forEncryption,
CipherParameters params) |
Initialise the cipher.
|
int |
processBlock(byte[] in,
int inOff,
byte[] out,
int outOff) |
Process one block of input from the array in and write it to
the out array.
|
void |
reset() |
Reset the cipher.
|
protected static final int DEFAULT_BLOCK_SIZE
public NullEngine()
public NullEngine(int blockSize)
blockSize
- the block size in bytes.public void init(boolean forEncryption, CipherParameters params) throws java.lang.IllegalArgumentException
BlockCipher
init
in interface BlockCipher
forEncryption
- if true the cipher is initialised for
encryption, if false for decryption.params
- the key and other data required by the cipher.java.lang.IllegalArgumentException
- if the params argument is
inappropriate.public java.lang.String getAlgorithmName()
BlockCipher
getAlgorithmName
in interface BlockCipher
public int getBlockSize()
BlockCipher
getBlockSize
in interface BlockCipher
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
BlockCipher
processBlock
in interface BlockCipher
in
- the array containing the input data.inOff
- offset into the in array the data starts at.out
- the array the output data will be copied into.outOff
- the offset into the out array the output will start at.DataLengthException
- if there isn't enough data in in, or
space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.public void reset()
BlockCipher
reset
in interface BlockCipher