XChaCha20Poly1305 (Bouncy Castle Library 1.85 API Specification)

java.lang.Object
- org.bouncycastle.crypto.modes.ChaCha20Poly1305
- - org.bouncycastle.crypto.modes.XChaCha20Poly1305

All Implemented Interfaces:

AEADCipher
```
public class XChaCha20Poly1305
extends ChaCha20Poly1305
```
XChaCha20-Poly1305 AEAD construction as described in draft-irtf-cfrg-xchacha-03 sec. 2.4.
Identical to ChaCha20Poly1305 except that the underlying stream cipher is XChaCha20Engine (192 bit nonce instead of 96 bit). The extended nonce makes random-nonce strategies safe at scale: with a 192 bit nonce, collisions remain negligibly likely up to 2^80 messages per key, removing the per-key counter / deterministic-nonce constraint that standard ChaCha20-Poly1305 imposes.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  XChaCha20Poly1305()
  
  XChaCha20Poly1305(Mac poly1305)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.String getAlgorithmName()
  Return the name of the algorithm.
  - Methods inherited from class org.bouncycastle.crypto.modes.ChaCha20Poly1305
    doFinal, getMac, getOutputSize, getUpdateOutputSize, init, processAADByte, processAADBytes, processByte, processBytes, reset
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - XChaCha20Poly1305
```
public XChaCha20Poly1305()
```
  - XChaCha20Poly1305
```
public XChaCha20Poly1305(Mac poly1305)
```
- Method Detail
  - getAlgorithmName
```
public java.lang.String getAlgorithmName()
```
    Description copied from interface: AEADCipher
    
    Return the name of the algorithm.
    
    Specified by:
    
    getAlgorithmName in interface AEADCipher
    
    Overrides:
    
    getAlgorithmName in class ChaCha20Poly1305
    
    Returns:
    
    the algorithm name.