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## org.bouncycastle.crypto.paddings
Class TBCPadding

    java.lang.Object
      org.bouncycastle.crypto.paddings.TBCPadding

All Implemented Interfaces:
  BlockCipherPadding

public class TBCPadding
extends java.lang.Object
implements BlockCipherPadding

A padder that adds Trailing-Bit-Compliment padding to a block.

This padding pads the block out with the compliment of the last bit of the plain text.

Constructor Summary
`TBCPadding()`

Method Summary
`int` | `addPadding(byte[] in, int inOff)` add the pad bytes to the passed in block, returning the number of bytes added.
`java.lang.String` | `getPaddingName()` Return the name of the algorithm the padder implements.
`void` | `init(java.security.SecureRandom random)` Initialise the padder.
`int` | `padCount(byte[] in)` return the number of pad bytes present in the block.

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

Constructor Detail

### TBCPadding

    public TBCPadding()

Method Detail

### init

    public void init(java.security.SecureRandom random)
              throws java.lang.IllegalArgumentException

  Initialise the padder.

  Specified by:
    `init` in interface `BlockCipherPadding`
  Parameters:
    `random` - - a SecureRandom if available.
  Throws:
    `java.lang.IllegalArgumentException`

### getPaddingName

    public java.lang.String getPaddingName()

  Return the name of the algorithm the padder implements.

  Specified by:
    `getPaddingName` in interface `BlockCipherPadding`
  Returns:
    the name of the algorithm the padder implements.

### addPadding

    public int addPadding(byte[] in,
                          int inOff)

  add the pad bytes to the passed in block, returning the number of bytes added.

  Note: this assumes that the last block of plain text is always passed to it inside in. i.e. if inOff is zero, indicating the entire block is to be overwritten with padding the value of in should be the same as the last block of plain text.

  Specified by:
    `addPadding` in interface `BlockCipherPadding`

### padCount

    public int padCount(byte[] in)
                 throws InvalidCipherTextException

  return the number of pad bytes present in the block.

  Specified by:
    `padCount` in interface `BlockCipherPadding`
  Throws:
    `InvalidCipherTextException` - if the padding is badly formed or invalid.

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