Package org.bouncycastle.jce

Source Code of org.bouncycastle.jce.X509KeyUsage

package org.bouncycastle.jce;

import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.x509.KeyUsage;

/**
* A holding class for constructing an X509 Key Usage extension.
*
* <pre>
*    id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }
*
*    KeyUsage ::= BIT STRING {
*         digitalSignature        (0),
*         nonRepudiation          (1),
*         keyEncipherment         (2),
*         dataEncipherment        (3),
*         keyAgreement            (4),
*         keyCertSign             (5),
*         cRLSign                 (6),
*         encipherOnly            (7),
*         decipherOnly            (8) }
* </pre>
*/
public class X509KeyUsage
    extends ASN1Object
{
    public static final int        digitalSignature = 1 << 7;
    public static final int        nonRepudiation   = 1 << 6;
    public static final int        keyEncipherment  = 1 << 5;
    public static final int        dataEncipherment = 1 << 4;
    public static final int        keyAgreement     = 1 << 3;
    public static final int        keyCertSign      = 1 << 2;
    public static final int        cRLSign          = 1 << 1;
    public static final int        encipherOnly     = 1 << 0;
    public static final int        decipherOnly     = 1 << 15;

    private int usage = 0;

    /**
     * Basic constructor.
     *
     * @param usage - the bitwise OR of the Key Usage flags giving the
     * allowed uses for the key.
     * e.g. (X509KeyUsage.keyEncipherment | X509KeyUsage.dataEncipherment)
     */
    public X509KeyUsage(
        int usage)
    {
        this.usage = usage;
    }

    public ASN1Primitive toASN1Primitive()
    {
        return new KeyUsage(usage).toASN1Primitive();
    }
}
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