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Java Source Code / Java Documentation » Security » Bouncy Castle » org.bouncycastle.crypto.agreement

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.bouncycastle.crypto.agreement .DHAgreement

DHAgreement

public class DHAgreement (Code)

a Diffie-Hellman key exchange engine.

note: This uses MTI/A0 key agreement in order to make the key agreement secure against passive attacks. If you're doing Diffie-Hellman and both parties have long term public keys you should look at using this. For further information have a look at RFC 2631.

It's possible to extend this to more than two parties as well, for the moment that is left as an exercise for the reader.

Method Summary
public BigInteger	calculateAgreement(DHPublicKeyParameters pub, BigInteger message) given a message from a given party and the corresponding public key, calculate the next message in the agreement sequence.
public BigInteger	calculateMessage() calculate our initial message.
public void	init(CipherParameters param)

Method Detail

calculateAgreement
public BigInteger calculateAgreement(DHPublicKeyParameters pub, BigInteger message)(Code)
	given a message from a given party and the corresponding public key, calculate the next message in the agreement sequence. In this case this will represent the shared secret.

calculateMessage
public BigInteger calculateMessage()(Code)
	calculate our initial message.

init
public void init(CipherParameters param)(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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