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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.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;

import org.bouncycastle.bcpg.BCPGInputStream;
import org.bouncycastle.bcpg.LiteralDataPacket;
import org.bouncycastle.bcpg.Packet;
import org.bouncycastle.bcpg.PacketTags;

/**
 * A single literal data packet in a PGP object stream.
 */
public class PGPLiteralData
{
    /** Format tag for binary literal data */
    public static final char    BINARY = 'b';
    /** Format tag for textual literal data */
    public static final char    TEXT = 't';
    /** Format tag for UTF-8 encoded textual literal data */
    public static final char    UTF8 = 'u';
    /** Format tag for MIME message bodies */
    public static final char    MIME = 'm';

    /**
     * The special name indicating a "for your eyes only" packet.
     */
    public static final String  CONSOLE = "_CONSOLE";

    /**
     * The special time for a modification time of "now" or
     * the present time.
     */
    public static final Date    NOW = new Date(0L);

    LiteralDataPacket    data;

    /**
     * Construct a PGP LiteralData carrier from the passed in byte array.
     *
     * @param encData an encoding of PGP literal data.
     * @throws IOException if an error occurs reading from the PGP input.
     */
    public PGPLiteralData(
        byte[]    encData)
        throws IOException
    {
        this(Util.createBCPGInputStream(new ByteArrayInputStream(encData), PacketTags.LITERAL_DATA));
    }

    /**
     * Construct a PGP LiteralData carrier from the passed in input stream.
     *
     * @param inStream an input stream containing an encoding of PGP literal data.
     * @throws IOException if an error occurs reading from the PGP input.
     */
    public PGPLiteralData(
        InputStream    inStream)
        throws IOException
    {
        this(Util.createBCPGInputStream(inStream, PacketTags.LITERAL_DATA));
    }

    /**
     * Construct a PGP LiteralData carrier from the passed in BCPG input stream.
     *
     * @param pIn a BCPG input stream containing an encoded PGP literal data structure.
     * @throws IOException if an error occurs reading from the PGP input.
     */
    public PGPLiteralData(
        BCPGInputStream    pIn)
        throws IOException
    {
        Packet packet = pIn.readPacket();
        if (!(packet instanceof LiteralDataPacket))
        {
            throw new IOException("unexpected packet in stream: " + packet);
        }
        data  = (LiteralDataPacket)packet;
    }

    /**
     * Return the format of the data packet. One of {@link #BINARY}, {@link #TEXT}, {@link #MIME} or {@link #UTF8}
     */
    public int getFormat()
    {
        return data.getFormat();
    }

    /**
     * Return the file name associated with the data packet.
     */
    public String getFileName()
    {
        return data.getFileName();
    }

    /**
     * Return the file name as an uninterpreted (UTF-8 encoded) byte array.
     */
    public byte[] getRawFileName()
    {
        return data.getRawFileName();
    }

    /**
     * Return the modification time for the file (at second level precision).
     */
    public Date getModificationTime()
    {
        return new Date(data.getModificationTime());
    }

    /**
     * Return the raw input stream for the data packet.
     */
    public InputStream getInputStream()
    {
        return data.getInputStream();
    }

    /**
     * Return the input stream representing the data stream.
     * Equivalent to {@link #getInputStream()}.
     */
    public InputStream getDataStream()
    {
        return this.getInputStream();
    }
}