1.3 updates

Author: dghgit

core/src/main/jdk1.3/org/bouncycastle/crypto/SecretWithEncapsulation.java

@@ -0,0 +1,25 @@
+package org.bouncycastle.crypto;
+
+/**
+ * Interface describing secret with encapsulation details.
+ */
+public interface SecretWithEncapsulation
+{
+// Destroyable methods
+    void destroy();
+    boolean isDestroyed();
+
+    /**
+     * Return the secret associated with the encapsulation.
+     *
+     * @return the secret the encapsulation is for.
+     */
+    byte[] getSecret();
+
+    /**
+     * Return the data that carries the secret in its encapsulated form.
+     *
+     * @return the encapsulation of the secret.
+     */
+    byte[] getEncapsulation();
+}

core/src/main/jdk1.3/org/bouncycastle/pqc/crypto/util/SecretWithEncapsulationImpl.java

@@ -0,0 +1,84 @@
+package org.bouncycastle.pqc.crypto.util;
+
+import org.bouncycastle.crypto.SecretWithEncapsulation;
+import org.bouncycastle.util.Arrays;
+
+public class SecretWithEncapsulationImpl
+    implements SecretWithEncapsulation
+{
+    private final AtomicBoolean hasBeenDestroyed = new AtomicBoolean(false);
+
+    private final byte[] sessionKey;
+    private final byte[] cipher_text;
+
+    public SecretWithEncapsulationImpl(byte[] sessionKey, byte[] cipher_text)
+    {
+        this.sessionKey = sessionKey;
+        this.cipher_text = cipher_text;
+    }
+
+    public byte[] getSecret()
+    {
+        checkDestroyed();
+
+        return Arrays.clone(sessionKey);
+    }
+
+    public byte[] getEncapsulation()
+    {
+        checkDestroyed();
+
+        return Arrays.clone(cipher_text);
+    }
+
+    public void destroy()
+    {
+        if (!hasBeenDestroyed.getAndSet(true))
+        {
+            Arrays.clear(sessionKey);
+            Arrays.clear(cipher_text);
+        }
+    }
+
+    public boolean isDestroyed()
+    {
+        return hasBeenDestroyed.get();
+    }
+
+    void checkDestroyed()
+    {
+        if (isDestroyed())
+        {
+            throw new IllegalStateException("data has been destroyed");
+        }
+    }
+
+    private static class AtomicBoolean
+    {
+        private volatile boolean value;
+
+        AtomicBoolean(boolean value)
+        {
+            this.value = value;
+        }
+
+        public synchronized void set(boolean value)
+        {
+            this.value = value;
+        }
+
+        public synchronized boolean getAndSet(boolean value)
+        {
+            boolean tmp = this.value;
+
+            this.value = value;
+
+            return tmp;
+        }
+
+        public synchronized boolean get()
+        {
+            return this.value;
+        }
+    }
+}