Class DHPublicKey

core/src/main/java/org/bouncycastle/asn1/x9/DHPublicKey.java:16–98

X9.42 definition of a DHPublicKey DHPublicKey ::= INTEGER

 * </pre>
 */
public class DHPublicKey
    extends ASN1Object
{
    private ASN1Integer y;

    /**
     * Return a DHPublicKey from the passed in tagged object.
     *
     * @param obj a tagged object.
     * @param explicit true if the contents of the object is explictly tagged, false otherwise.
     * @return a DHPublicKey
     */
    public static DHPublicKey getInstance(ASN1TaggedObject obj, boolean explicit)
    {
        return getInstance(ASN1Integer.getInstance(obj, explicit));
    }

    /**
     * Return a DHPublicKey from the passed in object.
     *
     * @param obj an object for conversion or a byte[].
     * @return a DHPublicKey
     */
    public static DHPublicKey getInstance(Object obj)
    {
        if (obj == null || obj instanceof DHPublicKey)
        {
            return (DHPublicKey)obj;
        }

        if (obj instanceof ASN1Integer)
        {
            return new DHPublicKey((ASN1Integer)obj);
        }

        throw new IllegalArgumentException("Invalid DHPublicKey: " + obj.getClass().getName());
    }

    private DHPublicKey(ASN1Integer y)
    {
        if (y == null)
        {
            throw new IllegalArgumentException("'y' cannot be null");
        }

        this.y = y;
    }

    /**
     * Base constructor.
     *
     * @param y the public value Y.
     */
    public DHPublicKey(BigInteger y)
    {
        if (y == null)
        {
            throw new IllegalArgumentException("'y' cannot be null");