org.encryptor4j

Class DHPeer

java.lang.Object

org.encryptor4j.KeyAgreementPeer

org.encryptor4j.DHPeer

public class DHPeer
extends KeyAgreementPeer

KeyAgreementPeer implementation that uses the Diffie-Hellman key agreement protocol.

Author:

Martin

Constructor Summary

Constructors

Constructor and Description
DHPeer(java.math.BigInteger p, java.math.BigInteger g) Constructs a DHPeer instance using primes p and g.
DHPeer(java.math.BigInteger p, java.math.BigInteger g, java.security.KeyPair keyPair) Constructs a DHPeer instance using primes p and g.
DHPeer(java.math.BigInteger p, java.math.BigInteger g, java.security.KeyPair keyPair, java.lang.String provider) Constructs a DHPeer instance using primes p and g.

Method Summary

Modifier and Type	Method and Description
static java.security.KeyPair	createKeyPair(java.math.BigInteger p, java.math.BigInteger g) Creates and returns a DH key pair for the given p and g.
static java.security.KeyPair	createKeyPair(java.math.BigInteger p, java.math.BigInteger g, java.security.Provider provider) Creates and returns a DH key pair for the given p, g and provider.
java.math.BigInteger	getG() Returns prime g.
java.math.BigInteger	getP() Returns prime p.

Methods inherited from class org.encryptor4j.KeyAgreementPeer

computeSharedSecret, getKeyAgreement, getPublicKey

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DHPeer

public DHPeer(java.math.BigInteger p,
              java.math.BigInteger g)
       throws java.security.GeneralSecurityException

Constructs a DHPeer instance using primes p and g.

Note: Use BigInteger.probablePrime(int, java.util.Random) to create good p and g candidates.

Parameters:

p -

g -

Throws:

java.security.GeneralSecurityException

DHPeer

public DHPeer(java.math.BigInteger p,
              java.math.BigInteger g,
              java.security.KeyPair keyPair)
       throws java.security.GeneralSecurityException

Constructs a DHPeer instance using primes p and g.

Note: Use BigInteger.probablePrime(int, java.util.Random) to create good p and g candidates.

Parameters:

p -

g -

keyPair -

Throws:

java.security.GeneralSecurityException

DHPeer

public DHPeer(java.math.BigInteger p,
              java.math.BigInteger g,
              java.security.KeyPair keyPair,
              java.lang.String provider)
       throws java.security.GeneralSecurityException

Constructs a DHPeer instance using primes p and g.

Note: Use BigInteger.probablePrime(int, java.util.Random) to create good p and g candidates.

Parameters:

p -

g -

keyPair -

Throws:

java.security.GeneralSecurityException

Method Detail

getP

public java.math.BigInteger getP()

Returns prime p.

Returns:

getG

public java.math.BigInteger getG()

Returns prime g.

Returns:

createKeyPair

public static final java.security.KeyPair createKeyPair(java.math.BigInteger p,
                                                        java.math.BigInteger g)
                                                 throws java.security.GeneralSecurityException

Creates and returns a DH key pair for the given p and g.

Parameters:

p -

g -

Returns:

Throws:

java.security.GeneralSecurityException

createKeyPair

public static final java.security.KeyPair createKeyPair(java.math.BigInteger p,
                                                        java.math.BigInteger g,
                                                        java.security.Provider provider)
                                                 throws java.security.GeneralSecurityException

Creates and returns a DH key pair for the given p, g and provider.

Parameters:

p -

g -

provider -

Returns:

Throws:

java.security.GeneralSecurityException