org.bouncycastle.bcpg.sig.KeyFlags.java Source code

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Here is the source code for org.bouncycastle.bcpg.sig.KeyFlags.java

Source

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;
    }
}