AuthContext.java

/*
 * otr4j, the open source java otr library.
 * 
 * Distributable under LGPL license. See terms of license at gnu.org.
 */
package net.java.otr4j.session;

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.PublicKey;

import javax.crypto.interfaces.DHPublicKey;

import net.java.otr4j.OtrException;
import net.java.otr4j.io.messages.AbstractMessage;

/** @author George Politis */
interface AuthContext {

    public static final int NONE = 0;
    public static final int AWAITING_DHKEY = 1;
    public static final int AWAITING_REVEALSIG = 2;
    public static final int AWAITING_SIG = 3;
    public static final int V1_SETUP = 4;
    public static final byte C_START = (byte) 0x01;
    public static final byte M1_START = (byte) 0x02;
    public static final byte M2_START = (byte) 0x03;
    public static final byte M1p_START = (byte) 0x04;
    public static final byte M2p_START = (byte) 0x05;
    public static final byte EXTRA_SYMMETRIC_KEY = (byte) 0xFF;
    
    public abstract void reset();

    public abstract boolean getIsSecure();

    public abstract DHPublicKey getRemoteDHPublicKey();

    public abstract KeyPair getLocalDHKeyPair() throws OtrException;

    public abstract BigInteger getS() throws OtrException;

    public abstract void handleReceivingMessage(AbstractMessage m) throws OtrException;

    public abstract void startV2Auth() throws OtrException;

    public abstract void respondV2Auth() throws OtrException;

    public abstract PublicKey getRemoteLongTermPublicKey();

    public abstract KeyPair getLocalLongTermKeyPair();
    
    public abstract byte[] getExtraSymmetricKey() throws OtrException;
}