gnu.crypto.key.dh

Class DiffieHellmanKeyAgreement

public abstract class DiffieHellmanKeyAgreement extends BaseKeyAgreementParty

The basic version of the Diffie-Hellman key agreement is described in the Handbook of Applied Cryptography [HAC] as follows:

RFC-2631 describes a Static-Static Mode of operations with Diffie-Hellman keypairs as follows:

 "In Static-Static mode, both the sender and the recipient have a
   static (and certified) key pair. Since the sender's and recipient's
   keys are therefore the same for each message, ZZ will be the same for
   each message. Thus, partyAInfo MUST be used (and different for each
   message) in order to ensure that different messages use different
   KEKs. Implementations MAY implement Static-Static mode."
 

Reference:

  1. Diffie-Hellman Key Agreement Method
    Eric Rescorla.
  2. [HAC]: Handbook of Applied Cryptography.
    CRC Press, Inc. ISBN 0-8493-8523-7, 1997
    Menezes, A., van Oorschot, P. and S. Vanstone.

Version: $Revision: 1.2 $

Field Summary
static StringKA_DIFFIE_HELLMAN_OWNER_PRIVATE_KEY
protected DHPrivateKeyownerKey
The key agreement party's private key.
static StringSOURCE_OF_RANDOMNESS
protected BigIntegerZZ
The shared secret key.
Constructor Summary
protected DiffieHellmanKeyAgreement()
Method Summary
protected voidengineReset()
protected byte[]engineSharedSecret()

Field Detail

KA_DIFFIE_HELLMAN_OWNER_PRIVATE_KEY

public static final String KA_DIFFIE_HELLMAN_OWNER_PRIVATE_KEY

ownerKey

protected DHPrivateKey ownerKey
The key agreement party's private key.

SOURCE_OF_RANDOMNESS

public static final String SOURCE_OF_RANDOMNESS

ZZ

protected BigInteger ZZ
The shared secret key.

Constructor Detail

DiffieHellmanKeyAgreement

protected DiffieHellmanKeyAgreement()

Method Detail

engineReset

protected void engineReset()

engineSharedSecret

protected byte[] engineSharedSecret()
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