Bouncy Castle Cryptography 1.11 API Specification: Class DESedeEngine
org.bouncycastle.crypto.engines
Class DESedeEngine
java.lang.Object
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+--org.bouncycastle.crypto.engines.DESEngine
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+--org.bouncycastle.crypto.engines.DESedeEngine
- All Implemented Interfaces:
- BlockCipher
- public class DESedeEngine
- extends DESEngine
a class that provides a basic DESede (or Triple DES) engine.
Method Summary |
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 encrypting,
CipherParameters params)
initialise a DESede 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. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
BLOCK_SIZE
protected static final int BLOCK_SIZE
DESedeEngine
public DESedeEngine()
- standard constructor.
init
public void init(boolean encrypting,
CipherParameters params)
- initialise a DESede cipher.
- Overrides:
init
in class DESEngine
- Parameters:
forEncryption
- whether or not we are for encryption.params
- the parameters required to set up the cipher.- Throws:
java.lang.IllegalArgumentException
- if the params argument is
inappropriate.
getAlgorithmName
public java.lang.String getAlgorithmName()
- Description copied from interface:
BlockCipher
- Return the name of the algorithm the cipher implements.
- Overrides:
getAlgorithmName
in class DESEngine
- Following copied from interface:
org.bouncycastle.crypto.BlockCipher
- Returns:
- the name of the algorithm the cipher implements.
getBlockSize
public int getBlockSize()
- Description copied from interface:
BlockCipher
- Return the block size for this cipher (in bytes).
- Overrides:
getBlockSize
in class DESEngine
- Following copied from interface:
org.bouncycastle.crypto.BlockCipher
- Returns:
- the block size for this cipher in bytes.
processBlock
public int processBlock(byte[] in,
int inOff,
byte[] out,
int outOff)
- Description copied from interface:
BlockCipher
- Process one block of input from the array in and write it to
the out array.
- Overrides:
processBlock
in class DESEngine
- Following copied from interface:
org.bouncycastle.crypto.BlockCipher
- Parameters:
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.- Returns:
- the number of bytes processed and produced.
- Throws:
DataLengthException
- if there isn't enough data in in, or
space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.
reset
public void reset()
- Description copied from interface:
BlockCipher
- Reset the cipher. After resetting the cipher is in the same state
as it was after the last init (if there was one).
- Overrides:
reset
in class DESEngine