com.sshtools.cipher
Class CtrBlockCipher
java.lang.Object
com.maverick.ssh.cipher.SshCipher
com.sshtools.cipher.CtrBlockCipher
- Direct Known Subclasses:
- AES128Ctr, AES192Ctr, AES256Ctr
- public class CtrBlockCipher
- extends SshCipher
Constructor Summary |
CtrBlockCipher(int keybits,
com.maverick.crypto.engines.CipherEngine engine,
java.lang.String algorithm)
Contruct a CTR block cipher using the engine supplied. |
Method Summary |
int |
getBlockSize()
Get the cipher block size. |
void |
init(int mode,
byte[] iv,
byte[] keydata)
Initialize the cipher with up to 40 bytes of iv and key data. |
int |
processBlock(byte[] in,
int inOff,
byte[] out,
int outOff)
|
void |
transform(byte[] in,
int start,
byte[] output,
int offset,
int len)
Transform the byte array according to the cipher mode; it is legal for the
source and destination arrays to reference the same physical array so
care should be taken in the transformation process to safeguard this rule. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CtrBlockCipher
public CtrBlockCipher(int keybits,
com.maverick.crypto.engines.CipherEngine engine,
java.lang.String algorithm)
- Contruct a CTR block cipher using the engine supplied.
- Parameters:
keybits
- the number of key bits to use.engine
- the cipher engine.
transform
public void transform(byte[] in,
int start,
byte[] output,
int offset,
int len)
throws java.io.IOException
- Description copied from class:
SshCipher
- Transform the byte array according to the cipher mode; it is legal for the
source and destination arrays to reference the same physical array so
care should be taken in the transformation process to safeguard this rule.
- Specified by:
transform
in class SshCipher
- Parameters:
offset
- len
-
- Returns:
- the transformed data
- Throws:
java.io.IOException
init
public void init(int mode,
byte[] iv,
byte[] keydata)
throws java.io.IOException
- Description copied from class:
SshCipher
- Initialize the cipher with up to 40 bytes of iv and key data. Each implementation
should take as much data from the initialization as it needs ignoring any data
that it does not require.
- Specified by:
init
in class SshCipher
- Parameters:
mode
- the mode to operateiv
- the initiaization vectorkeydata
- the key data
- Throws:
java.io.IOException
getBlockSize
public int getBlockSize()
- Description copied from class:
SshCipher
- Get the cipher block size.
- Specified by:
getBlockSize
in class SshCipher
- Returns:
- the block size in bytes.
processBlock
public int processBlock(byte[] in,
int inOff,
byte[] out,
int outOff)
throws java.io.IOException
- Throws:
java.io.IOException
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