keyusage.java

进行与数字证书相关开发必须的java源码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   KeyUsage.java

package jit.asn1.x509;

import jit.asn1.DERBitString;

public class KeyUsage extends DERBitString
{

    public static final int digitalSignature = 128;
    public static final int nonRepudiation = 64;
    public static final int keyEncipherment = 32;
    public static final int dataEncipherment = 16;
    public static final int keyAgreement = 8;
    public static final int keyCertSign = 4;
    public static final int cRLSign = 2;
    public static final int encipherOnly = 1;
    public static final int decipherOnly = 32768;

    public KeyUsage(int usage)
    {
        super(DERBitString.getBytes(usage), DERBitString.getPadBits(usage));
    }

    public KeyUsage(DERBitString usage)
    {
        super(usage.getBytes(), usage.getPadBits());
    }

    public boolean[] getKeyUsage()
    {
        byte bKeyUsage[] = getBytes();
        int length = bKeyUsage.length * 8 - getPadBits();
        boolean keyUsage[] = new boolean[length >= 9 ? length : 9];
        for(int i = 0; i != length; i++)
            keyUsage[i] = (bKeyUsage[i / 8] & 128 >>> i % 8) != 0;

        return keyUsage;
    }

    static 
    {
        digitalSignature = 128;
        nonRepudiation = 64;
        keyEncipherment = 32;
        dataEncipherment = 16;
        keyAgreement = 8;
        keyCertSign = 4;
        cRLSign = 2;
        encipherOnly = 1;
        decipherOnly = 32768;
    }
}