AsymmetricBlockCipher (Bouncy Castle Library 1.68 API Specification)

All Known Implementing Classes:

ElGamalEngine, ISO9796d1Encoding, NaccacheSternEngine, NTRUEngine, OAEPEncoding, PKCS1Encoding, RSABlindedEngine, RSABlindingEngine, RSAEngine
```
public interface AsymmetricBlockCipher
```
base interface that a public/private key block cipher needs to conform to.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getInputBlockSize()`	returns the largest size an input block can be.
`int`	`getOutputBlockSize()`	returns the maximum size of the block produced by this cipher.
`void`	`init(boolean forEncryption, CipherParameters param)`	initialise the cipher.
`byte[]`	`processBlock(byte[] in, int inOff, int len)`	process the block of len bytes stored in in from offset inOff.

- Method Detail
  - init
```
void init(boolean forEncryption,
          CipherParameters param)
```
    initialise the cipher.
    
    Parameters:
    
    forEncryption - if true the cipher is initialised for encryption, if false for decryption.
    
    param - the key and other data required by the cipher.
  - getInputBlockSize
```
int getInputBlockSize()
```
    returns the largest size an input block can be.
    
    Returns:
    
    maximum size for an input block.
  - getOutputBlockSize
```
int getOutputBlockSize()
```
    returns the maximum size of the block produced by this cipher.
    
    Returns:
    
    maximum size of the output block produced by the cipher.
  - processBlock
```
byte[] processBlock(byte[] in,
                    int inOff,
                    int len)
             throws InvalidCipherTextException
```
    process the block of len bytes stored in in from offset inOff.
    
    Parameters:
    
    in - the input data
    
    inOff - offset into the in array where the data starts
    
    len - the length of the block to be processed.
    
    Returns:
    
    the resulting byte array of the encryption/decryption process.
    
    Throws:
    
    InvalidCipherTextException - data decrypts improperly.
    
    DataLengthException - the input data is too large for the cipher.