org.bouncycastle.gpg.keybox.FirstBlob Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcpg-jdk15to18 Show documentation

The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

There is a newer version: 1.79

Show newest version

package org.bouncycastle.gpg.keybox;

import java.io.IOException;

import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Hex;


/**
 * First blob contains meta data about the KeyBox.
 */
public class FirstBlob
    extends Blob
{
    private final int headerFlags;
    private final long fileCreatedAt;
    private final long lastMaintenanceRun;

    private FirstBlob(
        int base,
        long length,
        BlobType type,
        int version,
        int headerFlags,
        long fileCreatedAt,
        long lastMaintenanceRun)
    {
        super(base, length, type, version);
        this.headerFlags = headerFlags;
        this.fileCreatedAt = fileCreatedAt;
        this.lastMaintenanceRun = lastMaintenanceRun;
    }

    static FirstBlob parseContent(int base, long length, BlobType type, int version, KeyBoxByteBuffer buffer)
        throws IOException
    {

        int headerFlags = buffer.u16();
        byte[] magic = buffer.bN(4);


        if (!Arrays.areEqual(magic, magicBytes))
        {
            // -DM Hex.toHexString
            // -DM Hex.toHexString
            throw new IOException("Incorrect magic expecting " + Hex.toHexString(magicBytes) + " but got " + Hex.toHexString(magic));
        }


        buffer.u32(); // RFU = Reserved for Future Use
        long fileCreatedAt = buffer.u32();
        long lastMaintenanceRun = buffer.u32();
        buffer.u32();  // RFU
        buffer.u32();  // RFU


        return new FirstBlob(base, length, type, version, headerFlags, fileCreatedAt, lastMaintenanceRun);
    }

    public int getHeaderFlags()
    {
        return headerFlags;
    }

    public long getFileCreatedAt()
    {
        return fileCreatedAt;
    }

    public long getLastMaintenanceRun()
    {
        return lastMaintenanceRun;
    }
}