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## org.bouncycastle.crypto.engines
Class CAST6Engine

    java.lang.Object
      |
      +--org.bouncycastle.crypto.engines.CAST5Engine
            |
            +--org.bouncycastle.crypto.engines.CAST6Engine

All Implemented Interfaces:
  BlockCipher

public final class CAST6Engine
extends CAST5Engine

A class that provides CAST6 key encryption operations, such as encoding data and generating keys. All the algorithms herein are from the Internet RFC RFC2612 - CAST6 (128bit block, 128-256bit key) and implement a simplified cryptography interface.

Field Summary
`protected int[]` | `_Km`
`protected int[]` | `_Kr`
`protected int[]` | `_Tm`
`protected int[]` | `_Tr`
`protected static int` | `BLOCK_SIZE`
`protected static int` | `ROUNDS`

Fields inherited from class org.bouncycastle.crypto.engines.CAST5Engine
`M32, MAX_ROUNDS, RED_ROUNDS, S1, S2, S3, S4, S5, S6, S7, S8`

Constructor Summary
`CAST6Engine()`

Method Summary
`protected void` | `CAST_Decipher(int A, int B, int C, int D, int[] result)` Does the 12 quad rounds rounds to decrypt the block.
`protected void` | `CAST_Encipher(int A, int B, int C, int D, int[] result)` Does the 12 quad rounds rounds to encrypt the block.
`protected int` | `decryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)` Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
`protected int` | `encryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)` Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
`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` | `reset()` Reset the cipher.
`protected void` | `setKey(byte[] key)`

Methods inherited from class org.bouncycastle.crypto.engines.CAST5Engine
`Bits32ToBytes, Bits32ToInts, BytesTo32bits, CAST_Decipher, CAST_Encipher, F1, F2, F3, init, IntsTo32bits, processBlock`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### ROUNDS

    protected static final int ROUNDS

See Also:
  Constant Field Values

### BLOCK_SIZE

    protected static final int BLOCK_SIZE

See Also:
  Constant Field Values

### _Kr

    protected int[] _Kr

### _Km

    protected int[] _Km

### _Tr

    protected int[] _Tr

### _Tm

    protected int[] _Tm

Constructor Detail

### CAST6Engine

    public CAST6Engine()

Method Detail

### getAlgorithmName

    public java.lang.String getAlgorithmName()

  Description copied from interface: `BlockCipher`
  Return the name of the algorithm the cipher implements.

  Specified by:
    `getAlgorithmName` in interface `BlockCipher`
  Overrides:
    `getAlgorithmName` in class `CAST5Engine`
  Returns:
    the name of the algorithm the cipher implements.

### 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).

  Specified by:
    `reset` in interface `BlockCipher`
  Overrides:
    `reset` in class `CAST5Engine`

### getBlockSize

    public int getBlockSize()

  Description copied from interface: `BlockCipher`
  Return the block size for this cipher (in bytes).

  Specified by:
    `getBlockSize` in interface `BlockCipher`
  Overrides:
    `getBlockSize` in class `CAST5Engine`
  Returns:
    the block size for this cipher in bytes.

### setKey

    protected void setKey(byte[] key)

  Overrides:
    `setKey` in class `CAST5Engine`

### encryptBlock

    protected int encryptBlock(byte[] src,
                               int srcIndex,
                               byte[] dst,
                               int dstIndex)

  Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.

  Overrides:
    `encryptBlock` in class `CAST5Engine`
  Parameters:
    `src` - The plaintext buffer
    `srcIndex` - An offset into src
    `dst` - The ciphertext buffer
    `dstIndex` - An offset into dst

### decryptBlock

    protected int decryptBlock(byte[] src,
                               int srcIndex,
                               byte[] dst,
                               int dstIndex)

  Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.

  Overrides:
    `decryptBlock` in class `CAST5Engine`
  Parameters:
    `src` - The plaintext buffer
    `srcIndex` - An offset into src
    `dst` - The ciphertext buffer
    `dstIndex` - An offset into dst

### CAST_Encipher

    protected final void CAST_Encipher(int A,
                                       int B,
                                       int C,
                                       int D,
                                       int[] result)

  Does the 12 quad rounds rounds to encrypt the block.

  Parameters:
    `A` - the 00-31 bits of the plaintext block
    `B` - the 32-63 bits of the plaintext block
    `C` - the 64-95 bits of the plaintext block
    `D` - the 96-127 bits of the plaintext block
    `result` - the resulting ciphertext

### CAST_Decipher

    protected final void CAST_Decipher(int A,
                                       int B,
                                       int C,
                                       int D,
                                       int[] result)

  Does the 12 quad rounds rounds to decrypt the block.

  Parameters:
    `A` - the 00-31 bits of the ciphertext block
    `B` - the 32-63 bits of the ciphertext block
    `C` - the 64-95 bits of the ciphertext block
    `D` - the 96-127 bits of the ciphertext block
    `result` - the resulting plaintext

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