org.spongycastle.bcpg.ModDetectionCodePacket Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of pg Show documentation

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.

The newest version!

package org.spongycastle.bcpg;

import java.io.*;

/**
 * basic packet for a modification detection code packet.
 */
public class ModDetectionCodePacket 
    extends ContainedPacket
{    
    private byte[]    digest;
    
    ModDetectionCodePacket(
        BCPGInputStream in)
        throws IOException
    {    
        this.digest = new byte[20];
        in.readFully(this.digest);
    }
    
    public ModDetectionCodePacket(
        byte[]    digest)
        throws IOException
    {    
        this.digest = new byte[digest.length];
        
        System.arraycopy(digest, 0, this.digest, 0, this.digest.length);
    }
    
    public byte[] getDigest()
    {
        byte[] tmp = new byte[digest.length];
        
        System.arraycopy(digest, 0, tmp, 0, tmp.length);
        
        return tmp;
    }
    
    public void encode(
        BCPGOutputStream    out) 
        throws IOException
    {
        out.writePacket(MOD_DETECTION_CODE, digest, false);
    }
}