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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for the Android platform. Android unfortunately ships with a stripped-down version of Bouncy Castle, which prevents easy upgrades - Spongy Castle overcomes this and provides a full, up-to-date version of the Bouncy Castle cryptographic libs.

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package org.spongycastle.bcpg.sig;

import org.spongycastle.bcpg.SignatureSubpacket;
import org.spongycastle.bcpg.SignatureSubpacketTags;
import org.spongycastle.util.Arrays;
import org.spongycastle.util.Strings;

/**
 * packet giving the User ID of the signer.
 */
public class SignerUserID 
    extends SignatureSubpacket
{
    public SignerUserID(
        boolean    critical,
        boolean    isLongLength,
        byte[]     data)
    {
        super(SignatureSubpacketTags.SIGNER_USER_ID, critical, isLongLength, data);
    }
    
    public SignerUserID(
        boolean    critical,
        String     userID)
    {
        super(SignatureSubpacketTags.SIGNER_USER_ID, critical, false, Strings.toUTF8ByteArray(userID));
    }
    
    public String getID()
    {
        return Strings.fromUTF8ByteArray(data);
    }

    public byte[] getRawID()
    {
        return Arrays.clone(data);
    }
}