| package org.bouncycastle.crypto; |
| |
| import java.math.BigInteger; |
| |
| /** |
| * The basic interface that basic Diffie-Hellman implementations |
| * conforms to. |
| */ |
| public interface BasicAgreement |
| { |
| /** |
| * initialise the agreement engine. |
| */ |
| void init(CipherParameters param); |
| |
| /** |
| * return the field size for the agreement algorithm in bytes. |
| */ |
| int getFieldSize(); |
| |
| /** |
| * given a public key from a given party calculate the next |
| * message in the agreement sequence. |
| */ |
| BigInteger calculateAgreement(CipherParameters pubKey); |
| } |