XDHBasicAgreement (Bouncy Castle Cryptography 1.77 API Specification)

java.lang.Object
- org.bouncycastle.crypto.agreement.XDHBasicAgreement

All Implemented Interfaces:

BasicAgreement
```
public class XDHBasicAgreement
extends java.lang.Object
implements BasicAgreement
```
Key agreement using X25519 or X448. Same as Weierstrauss curve based ECDH, except this uses the U-coordinate while ECDH uses the X-coordinate.

Constructor Summary

Constructors
Constructor Description

XDHBasicAgreement()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.math.BigInteger`	`calculateAgreement(CipherParameters pubKey)`	given a public key from a given party calculate the next message in the agreement sequence.
`int`	`getFieldSize()`	return the field size for the agreement algorithm in bytes.
`void`	`init(CipherParameters key)`	initialise the agreement engine.

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

- Constructor Detail
  - XDHBasicAgreement
```
public XDHBasicAgreement()
```
- Method Detail
  - init
```
public void init(CipherParameters key)
```
    Description copied from interface: BasicAgreement
    
    initialise the agreement engine.
    
    Specified by:
    
    init in interface BasicAgreement
  - getFieldSize
```
public int getFieldSize()
```
    Description copied from interface: BasicAgreement
    
    return the field size for the agreement algorithm in bytes.
    
    Specified by:
    
    getFieldSize in interface BasicAgreement
  - calculateAgreement
```
public java.math.BigInteger calculateAgreement(CipherParameters pubKey)
```
    Description copied from interface: BasicAgreement
    
    given a public key from a given party calculate the next message in the agreement sequence.
    
    Specified by:
    
    calculateAgreement in interface BasicAgreement