org.bouncycastle.bcpg.sig.KeyFlags Maven / Gradle / Ivy

Go to download

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

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.

There is a newer version: 2.0.9

Show newest version

package org.bouncycastle.bcpg.sig;

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

/**
 * Packet holding the key flag values.
 */
public class KeyFlags 
    extends SignatureSubpacket
{
    public static final int CERTIFY_OTHER = 0x01;
    public static final int SIGN_DATA = 0x02;
    public static final int ENCRYPT_COMMS = 0x04;
    public static final int ENCRYPT_STORAGE = 0x08;
    public static final int SPLIT = 0x10;
    public static final int AUTHENTICATION = 0x20;
    public static final int SHARED = 0x80;
    
    private static byte[] intToByteArray(
        int    v)
    {
        byte[] tmp = new byte[4];
        int    size = 0;

        for (int i = 0; i != 4; i++)
        {
            tmp[i] = (byte)(v >> (i * 8));
            if (tmp[i] != 0)
            {
                size = i;
            }
        }

        byte[]    data = new byte[size + 1];
        
        System.arraycopy(tmp, 0, data, 0, data.length);

        return data;
    }
    
    public KeyFlags(
        boolean    critical,
        boolean    isLongLength,
        byte[]     data)
    {
        super(SignatureSubpacketTags.KEY_FLAGS, critical, isLongLength, data);
    }
    
    public KeyFlags(
        boolean    critical,
        int        flags)
    {
        super(SignatureSubpacketTags.KEY_FLAGS, critical, false, intToByteArray(flags));
    }

    /**
     * Return the flag values contained in the first 4 octets (note: at the moment
     * the standard only uses the first one).
     *
     * @return flag values.
     */
    public int getFlags()
    {
        int flags = 0;

        for (int i = 0; i != data.length; i++)
        {
            flags |= (data[i] & 0xff) << (i * 8);
        }

        return flags;
    }
}