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The Long Term Stable (LTS) Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains the JCA/JCE provider and low-level API for the BC LTS version 2.73.7 for Java 8 and later.

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package org.bouncycastle.jcajce.spec;

import java.security.spec.AlgorithmParameterSpec;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.security.auth.Destroyable;

import org.bouncycastle.util.Arrays;

/**
 * SP 800-56C Hybrid Value spec, to allow the secret in a key agreement to be
 * created as "Z | T" where T is some other secret value as described in Section 2.
 * 

* Get methods throw IllegalStateException if destroy() is called. *

*/ public class HybridValueParameterSpec implements AlgorithmParameterSpec, Destroyable { private final AtomicBoolean hasBeenDestroyed = new AtomicBoolean(false); private volatile byte[] t; private volatile AlgorithmParameterSpec baseSpec; /** * Create a spec with T set to t and the spec for the KDF in the agreement to baseSpec. * Note: the t value is not copied. * * @param t a shared secret to be concatenated with the agreement's Z value. * @param baseSpec the base spec for the agreements KDF. */ public HybridValueParameterSpec(byte[] t, AlgorithmParameterSpec baseSpec) { this.t = t; this.baseSpec = baseSpec; } /** * Return a reference to the T value. * * @return a reference to T. */ public byte[] getT() { byte[] tVal = t; checkDestroyed(); return tVal; } /** * Return the base parameter spec. * * @return base spec to be applied to the KDF. */ public AlgorithmParameterSpec getBaseParameterSpec() { AlgorithmParameterSpec rv = this.baseSpec; checkDestroyed(); return rv; } /** * Return true if the destroy() method is called and the contents are * erased. * * @return true if destroyed, false otherwise. */ public boolean isDestroyed() { return this.hasBeenDestroyed.get(); } /** * Destroy this parameter spec, explicitly erasing its contents. */ public void destroy() { if (!hasBeenDestroyed.getAndSet(true)) { Arrays.clear(t); this.t = null; this.baseSpec = null; } } private void checkDestroyed() { if (isDestroyed()) { throw new IllegalStateException("spec has been destroyed"); } } }




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