diff -r fbd3585af53e -r 0ff0059f2ec3 src/net/java/otr4j/io/messages/SignatureM.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/java/otr4j/io/messages/SignatureM.java	Sun Dec 05 18:43:51 2010 +0100
@@ -0,0 +1,82 @@
+/*
+ * otr4j, the open source java otr library.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.otr4j.io.messages;
+
+import java.security.PublicKey;
+
+import javax.crypto.interfaces.DHPublicKey;
+
+/**
+ * 
+ * @author George Politis
+ */
+public class SignatureM {
+	// Fields.
+	public DHPublicKey localPubKey;
+	public DHPublicKey remotePubKey;
+	public PublicKey localLongTermPubKey;
+	public int keyPairID;
+	
+	// Ctor.
+	public SignatureM(DHPublicKey localPubKey, DHPublicKey remotePublicKey,
+			PublicKey localLongTermPublicKey, int keyPairID) {
+
+		this.localPubKey = localPubKey;
+		this.remotePubKey = remotePublicKey;
+		this.localLongTermPubKey = localLongTermPublicKey;
+		this.keyPairID = keyPairID;
+	}
+
+	// Methods.
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + keyPairID;
+		// TODO: Needs work.
+		result = prime
+				* result
+				+ ((localLongTermPubKey == null) ? 0 : localLongTermPubKey
+						.hashCode());
+		result = prime * result
+				+ ((localPubKey == null) ? 0 : localPubKey.hashCode());
+		result = prime * result
+				+ ((remotePubKey == null) ? 0 : remotePubKey.hashCode());
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		// TODO: Needs work.
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		SignatureM other = (SignatureM) obj;
+		if (keyPairID != other.keyPairID)
+			return false;
+		if (localLongTermPubKey == null) {
+			if (other.localLongTermPubKey != null)
+				return false;
+		} else if (!localLongTermPubKey.equals(other.localLongTermPubKey))
+			return false;
+		if (localPubKey == null) {
+			if (other.localPubKey != null)
+				return false;
+		} else if (!localPubKey.equals(other.localPubKey))
+			return false;
+		if (remotePubKey == null) {
+			if (other.remotePubKey != null)
+				return false;
+		} else if (!remotePubKey.equals(other.remotePubKey))
+			return false;
+		return true;
+	}
+
+}