--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/java/otr4j/session/AuthContext.java	Sun Dec 05 18:43:51 2010 +0100
@@ -0,0 +1,55 @@
+/*
+ * 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 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();
+}
\ No newline at end of file