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## org.bouncycastle.crypto.modes
Class KXTSBlockCipher

    java.lang.Object
      org.bouncycastle.crypto.BufferedBlockCipher
          org.bouncycastle.crypto.DefaultBufferedBlockCipher
              org.bouncycastle.crypto.modes.KXTSBlockCipher

public class KXTSBlockCipher
extends DefaultBufferedBlockCipher

Implementation of DSTU7624 XTS mode

Field Summary

Fields inherited from class org.bouncycastle.crypto.DefaultBufferedBlockCipher
`buf, bufOff, cipher, forEncryption, mbCipher, partialBlockOkay, pgpCFB`

Constructor Summary
`KXTSBlockCipher(BlockCipher cipher)`

Method Summary
`int` | `doFinal(byte[] output, int outOff)` Process the last block in the buffer.
`int` | `getOutputSize(int length)` return the size of the output buffer required for an update plus a doFinal with an input of 'length' bytes.
`protected static long` | `getReductionPolynomial(int blockSize)`
`int` | `getUpdateOutputSize(int len)` return the size of the output buffer required for an update an input of len bytes.
`void` | `init(boolean forEncryption, CipherParameters parameters)` initialise the cipher.
`int` | `processByte(byte in, byte[] out, int outOff)` process a single byte, producing an output block if necessary.
`int` | `processBytes(byte[] input, int inOff, int len, byte[] output, int outOff)` process an array of bytes, producing output if necessary.
`void` | `reset()` Reset the buffer and cipher.

Methods inherited from class org.bouncycastle.crypto.DefaultBufferedBlockCipher
`getBlockSize, getUnderlyingCipher`

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

Constructor Detail

### KXTSBlockCipher

    public KXTSBlockCipher(BlockCipher cipher)

Method Detail

### getReductionPolynomial

    protected static long getReductionPolynomial(int blockSize)

### getOutputSize

    public int getOutputSize(int length)

  Description copied from class: `DefaultBufferedBlockCipher`
  return the size of the output buffer required for an update plus a doFinal with an input of 'length' bytes.

  Overrides:
    `getOutputSize` in class `DefaultBufferedBlockCipher`
  Parameters:
    `length` - the length of the input.
  Returns:
    the space required to accommodate a call to update and doFinal with 'length' bytes of input.

### getUpdateOutputSize

    public int getUpdateOutputSize(int len)

  Description copied from class: `DefaultBufferedBlockCipher`
  return the size of the output buffer required for an update an input of len bytes.

  Overrides:
    `getUpdateOutputSize` in class `DefaultBufferedBlockCipher`
  Parameters:
    `len` - the length of the input.
  Returns:
    the space required to accommodate a call to update with len bytes of input.

### init

    public void init(boolean forEncryption,
                     CipherParameters parameters)

  Description copied from class: `DefaultBufferedBlockCipher`
  initialise the cipher.

  Overrides:
    `init` in class `DefaultBufferedBlockCipher`
  Parameters:
    `forEncryption` - if true the cipher is initialised for encryption, if false for decryption.
    `parameters` - the key and other data required by the cipher.

### processByte

    public int processByte(byte in,
                           byte[] out,
                           int outOff)

  Description copied from class: `DefaultBufferedBlockCipher`
  process a single byte, producing an output block if necessary.

  Overrides:
    `processByte` in class `DefaultBufferedBlockCipher`
  Parameters:
    `in` - the input byte.
    `out` - the space for any output that might be produced.
    `outOff` - the offset from which the output will be copied.
  Returns:
    the number of output bytes copied to out.

### processBytes

    public int processBytes(byte[] input,
                            int inOff,
                            int len,
                            byte[] output,
                            int outOff)

  Description copied from class: `DefaultBufferedBlockCipher`
  process an array of bytes, producing output if necessary.

  Overrides:
    `processBytes` in class `DefaultBufferedBlockCipher`
  Parameters:
    `input` - the input byte array.
    `inOff` - the offset at which the input data starts.
    `len` - the number of bytes to be copied out of the input array.
    `output` - the space for any output that might be produced.
    `outOff` - the offset from which the output will be copied.
  Returns:
    the number of output bytes copied to out.

### doFinal

    public int doFinal(byte[] output,
                       int outOff)

  Description copied from class: `DefaultBufferedBlockCipher`
  Process the last block in the buffer.

  Overrides:
    `doFinal` in class `DefaultBufferedBlockCipher`
  Parameters:
    `output` - the array the block currently being held is copied into.
    `outOff` - the offset at which the copying starts.
  Returns:
    the number of output bytes copied to out.

### reset

    public void reset()

  Description copied from class: `DefaultBufferedBlockCipher`
  Reset the buffer and cipher. After resetting the object is in the same state as it was after the last init (if there was one).

  Overrides:
    `reset` in class `DefaultBufferedBlockCipher`

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