BufferedAsymmetricBlockCipher (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.crypto.BufferedAsymmetricBlockCipher

```
public class BufferedAsymmetricBlockCipher
extends java.lang.Object
```
a buffer wrapper for an asymmetric block cipher, allowing input to be accumulated in a piecemeal fashion until final processing.

Field Summary

Fields
Modifier and Type Field Description

protected byte[] buf

protected int bufOff

Fields
Modifier and Type	Field	Description
`protected byte[]`	`buf`
`protected int`	`bufOff`

Constructor Summary

Constructors
Constructor Description

BufferedAsymmetricBlockCipher(AsymmetricBlockCipher cipher)
base constructor.

Constructors
Constructor	Description
`BufferedAsymmetricBlockCipher(AsymmetricBlockCipher cipher)`	base constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`doFinal()`	process the contents of the buffer using the underlying cipher.
`int`	`getBufferPosition()`	return the amount of data sitting in the buffer.
`int`	`getInputBlockSize()`	returns the largest size an input block can be.
`int`	`getOutputBlockSize()`	returns the maximum size of the block produced by this cipher.
`AsymmetricBlockCipher`	`getUnderlyingCipher()`	return the underlying cipher for the buffer.
`void`	`init(boolean forEncryption, CipherParameters params)`	initialise the buffer and the underlying cipher.
`void`	`processByte(byte in)`	add another byte for processing.
`void`	`processBytes(byte[] in, int inOff, int len)`	add len bytes to the buffer for processing.
`void`	`reset()`	Reset the buffer and the underlying cipher.

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

- Field Detail
  - buf
```
protected byte[] buf
```
  - bufOff
```
protected int bufOff
```
- Constructor Detail
  - BufferedAsymmetricBlockCipher
```
public BufferedAsymmetricBlockCipher(AsymmetricBlockCipher cipher)
```
    base constructor.
    
    Parameters:
    
    cipher - the cipher this buffering object wraps.
- Method Detail
  - getUnderlyingCipher
```
public AsymmetricBlockCipher getUnderlyingCipher()
```
    return the underlying cipher for the buffer.
    
    Returns:
    
    the underlying cipher for the buffer.
  - getBufferPosition
```
public int getBufferPosition()
```
    return the amount of data sitting in the buffer.
    
    Returns:
    
    the amount of data sitting in the buffer.
  - init
```
public void init(boolean forEncryption,
                 CipherParameters params)
```
    initialise the buffer and the underlying cipher.
    
    Parameters:
    
    forEncryption - if true the cipher is initialised for encryption, if false for decryption.
    
    params - the key and other data required by the cipher.
  - getInputBlockSize
```
public int getInputBlockSize()
```
    returns the largest size an input block can be.
    
    Returns:
    
    maximum size for an input block.
  - getOutputBlockSize
```
public int getOutputBlockSize()
```
    returns the maximum size of the block produced by this cipher.
    
    Returns:
    
    maximum size of the output block produced by the cipher.
  - processByte
```
public void processByte(byte in)
```
    add another byte for processing.
    
    Parameters:
    
    in - the input byte.
  - processBytes
```
public void processBytes(byte[] in,
                         int inOff,
                         int len)
```
    add len bytes to the buffer for processing.
    
    Parameters:
    
    in - the input data
    
    inOff - offset into the in array where the data starts
    
    len - the length of the block to be processed.
  - doFinal
```
public byte[] doFinal()
               throws InvalidCipherTextException
```
    process the contents of the buffer using the underlying cipher.
    
    Returns:
    
    the result of the encryption/decryption process on the buffer.
    
    Throws:
    
    InvalidCipherTextException - if we are given a garbage block.
  - reset
```
public void reset()
```
    Reset the buffer and the underlying cipher.

Class BufferedAsymmetricBlockCipher

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

buf

bufOff

Constructor Detail

BufferedAsymmetricBlockCipher

Method Detail

getUnderlyingCipher

getBufferPosition

init

getInputBlockSize

getOutputBlockSize

processByte

processBytes

doFinal

reset