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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.4. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.cms.jcajce;

import java.security.PrivateKey;

import javax.crypto.SecretKey;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.jcajce.util.DefaultJcaJceHelper;
import org.bouncycastle.operator.AsymmetricKeyUnwrapper;
import org.bouncycastle.operator.SymmetricKeyUnwrapper;
import org.bouncycastle.operator.jcajce.JceAsymmetricKeyUnwrapper;
import org.bouncycastle.operator.jcajce.JceKTSKeyUnwrapper;
import org.bouncycastle.operator.jcajce.JceSymmetricKeyUnwrapper;

class DefaultJcaJceExtHelper
    extends DefaultJcaJceHelper
    implements JcaJceExtHelper
{
    public JceAsymmetricKeyUnwrapper createAsymmetricUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, PrivateKey keyEncryptionKey)
    {
        keyEncryptionKey = CMSUtils.cleanPrivateKey(keyEncryptionKey);
        return new JceAsymmetricKeyUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey);
    }

    public JceKTSKeyUnwrapper createAsymmetricUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, PrivateKey keyEncryptionKey, byte[] partyUInfo, byte[] partyVInfo)
    {
        keyEncryptionKey = CMSUtils.cleanPrivateKey(keyEncryptionKey);
        return new JceKTSKeyUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey, partyUInfo, partyVInfo);
    }

    public SymmetricKeyUnwrapper createSymmetricUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, SecretKey keyEncryptionKey)
    {
        return new JceSymmetricKeyUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey);
    }

    public AsymmetricKeyUnwrapper createKEMUnwrapper(AlgorithmIdentifier keyEncryptionAlgorithm, PrivateKey keyEncryptionKey)
    {
        return new JceCMSKEMKeyUnwrapper(keyEncryptionAlgorithm, keyEncryptionKey);
    }
}