org.bouncycastle.crypto.asymmetric.AsymmetricLMSKey Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bc-fips-debug Show documentation

The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

There is a newer version: 2.0.0

Show newest version

package org.bouncycastle.crypto.asymmetric;

import org.bouncycastle.crypto.Algorithm;
import org.bouncycastle.crypto.AsymmetricKey;
import org.bouncycastle.crypto.CryptoServicesRegistrar;
import org.bouncycastle.crypto.fips.FipsUnapprovedOperationError;
import org.bouncycastle.crypto.general.LMS;

/**
 * Leighton-Micali Hash-Based Signatures (LMS) keys.
 */
public abstract class AsymmetricLMSKey
    implements AsymmetricKey
{
    private final boolean    approvedModeOnly;

    private Algorithm algorithm;

    protected final int L;

    AsymmetricLMSKey(int L)
    {
        this.approvedModeOnly = CryptoServicesRegistrar.isInApprovedOnlyMode();
        this.algorithm = LMS.ALGORITHM;
        this.L = L;
    }

    /**
      * Return the algorithm this Edwards Curve key is for.
      *
      * @return the key's algorithm.
      */
    public Algorithm getAlgorithm()
    {
        return algorithm;
    }

    /**
     * Return the number of levels (L) associated with the key.
     *
     * @return L.
     */
    public int getL()
    {
        return L;
    }

    protected void zeroize()
    {
        this.algorithm = null;
    }

    protected final boolean isThreadCorrectMode()
    {
        return approvedModeOnly == CryptoServicesRegistrar.isInApprovedOnlyMode();
    }

    protected final void checkApprovedOnlyModeStatus()
    {
        if (!isThreadCorrectMode())
        {
            throw new FipsUnapprovedOperationError("No access to key in current thread.");
        }
    }
}