derinteger.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 50 行

package org.bouncycastle.asn1;

import java.io.*;
import java.math.BigInteger;

public class DERInteger
    extends DERObject
{
    byte[]      bytes;

    public DERInteger(
        int         value)
    {
        bytes = BigInteger.valueOf(value).toByteArray();
    }

    public DERInteger(
        BigInteger   value)
    {
        bytes = value.toByteArray();
    }

    public DERInteger(
        byte[]   bytes)
    {
        this.bytes = bytes;
    }

    public BigInteger getValue()
    {
        return new BigInteger(bytes);
    }

    /**
     * in some cases positive values get crammed into a space,
     * that's not quite big enough...
     */
    public BigInteger getPositiveValue()
    {
        return new BigInteger(1, bytes);
    }

    void encode(
        DEROutputStream out)
        throws IOException
    {
        out.writeEncoded(INTEGER, bytes);
    }
}