org.bouncycastle.openpgp.PGPSessionKeyEncryptedData Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for the OpenPGP Protocol. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.openpgp;

import java.io.InputStream;

import org.bouncycastle.bcpg.AEADEncDataPacket;
import org.bouncycastle.bcpg.InputStreamPacket;
import org.bouncycastle.bcpg.SymmetricEncIntegrityPacket;
import org.bouncycastle.openpgp.operator.SessionKeyDataDecryptorFactory;

/**
 * The basis of PGP encrypted data - encrypted data encrypted using a symmetric session key.
 */
public class PGPSessionKeyEncryptedData
    extends PGPSymmetricKeyEncryptedData
{
    PGPSessionKeyEncryptedData(InputStreamPacket encData)
    {
        super(encData);
    }

    @Override
    public int getAlgorithm()
    {
        if (encData instanceof AEADEncDataPacket)
        {
            AEADEncDataPacket aeadData = (AEADEncDataPacket)encData;

            return aeadData.getAlgorithm();
        }
        else
        {
            return -1; // unknown
        }
    }

    @Override
    public int getVersion()
    {
        if (encData instanceof AEADEncDataPacket)
        {
            AEADEncDataPacket aeadData = (AEADEncDataPacket)encData;

            return aeadData.getVersion();
        }
        else if (encData instanceof SymmetricEncIntegrityPacket)
        {
            SymmetricEncIntegrityPacket symIntData = (SymmetricEncIntegrityPacket)encData;

            return symIntData.getVersion();
        }
        else
        {
            return -1;    // unmarked
        }
    }

    public InputStream getDataStream(
        SessionKeyDataDecryptorFactory dataDecryptorFactory)
        throws PGPException
    {
        encStream = createDecryptionStream(dataDecryptorFactory, dataDecryptorFactory.getSessionKey());

        return encStream;
    }
}