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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.bcpg.sig;

import org.bouncycastle.bcpg.SignatureSubpacket;
import org.bouncycastle.bcpg.SignatureSubpacketTags;
import org.bouncycastle.util.Strings;

/**
 * Represents revocation reason OpenPGP signature sub packet.
 */
public class RevocationReason extends SignatureSubpacket
{
    public RevocationReason(boolean isCritical, boolean isLongLength, byte[] data)
    {
        super(SignatureSubpacketTags.REVOCATION_REASON, isCritical, isLongLength, data);
    }

    public RevocationReason(boolean isCritical, byte reason, String description)
    {
        super(SignatureSubpacketTags.REVOCATION_REASON, isCritical, false, createData(reason, description));
    }

    private static byte[] createData(byte reason, String description)
    {
        byte[] descriptionBytes = Strings.toUTF8ByteArray(description);
        byte[] data = new byte[1 + descriptionBytes.length];

        data[0] = reason;
        System.arraycopy(descriptionBytes, 0, data, 1, descriptionBytes.length);

        return data;
    }

    public byte getRevocationReason()
    {
        return getData()[0];
    }

    public String getRevocationDescription()
    {
        byte[] data = getData();
        if (data.length == 1)
        {
            return "";
        }

        byte[] description = new byte[data.length - 1];
        System.arraycopy(data, 1, description, 0, description.length);

        return Strings.fromUTF8ByteArray(description);
    }
}