asn1/x9/X962Parameters.java

8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrompackage org.bouncycastle.asn1.x9;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.asn1.ASN1Choice;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.asn1.ASN1Null;
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstromimport org.bouncycastle.asn1.ASN1Object;
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstromimport org.bouncycastle.asn1.ASN1ObjectIdentifier;
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstromimport org.bouncycastle.asn1.ASN1Primitive;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.asn1.ASN1TaggedObject;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrompublic class X962Parameters
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom    extends ASN1Object
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    implements ASN1Choice
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom{
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom    private ASN1Primitive           params = null;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public static X962Parameters getInstance(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        Object obj)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        if (obj == null || obj instanceof X962Parameters)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            return (X962Parameters)obj;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        if (obj instanceof ASN1Primitive)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom            return new X962Parameters((ASN1Primitive)obj);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throw new IllegalArgumentException("unknown object in getInstance()");
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public static X962Parameters getInstance(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        ASN1TaggedObject obj,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        boolean          explicit)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        return getInstance(obj.getObject()); // must be explicitly tagged
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public X962Parameters(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        X9ECParameters      ecParameters)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        this.params = ecParameters.toASN1Primitive();
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public X962Parameters(
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        ASN1ObjectIdentifier  namedCurve)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        this.params = namedCurve;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public X962Parameters(
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        ASN1Primitive           obj)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        this.params = obj;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public boolean isNamedCurve()
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        return (params instanceof ASN1ObjectIdentifier);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    public boolean isImplicitlyCA()
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        return (params instanceof ASN1Null);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom    public ASN1Primitive getParameters()
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        return params;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    /**
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * Produce an object suitable for an ASN1OutputStream.
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * <pre>
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * Parameters ::= CHOICE {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     *    ecParameters ECParameters,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     *    namedCurve   CURVES.&id({CurveNames}),
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     *    implicitlyCA NULL
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * </pre>
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     */
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom    public ASN1Primitive toASN1Primitive()
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
4c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom        return (ASN1Primitive)params;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom}