pbkdf2params.java

来自「进行与数字证书相关开发必须的java源码」· Java 代码 · 共 69 行

// 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:   PBKDF2Params.java

package jit.asn1.pkcs.pkcs5;

import java.util.Enumeration;
import jit.asn1.*;
import jit.math.BigInteger;

// Referenced classes of package jit.asn1.pkcs.pkcs5:
//            KeyDerivationFunc

public class PBKDF2Params extends KeyDerivationFunc
{

    DERObjectIdentifier id;
    ASN1OctetString octStr;
    DERInteger iterationCount;
    DERInteger keyLength;

    PBKDF2Params(ASN1Sequence seq)
    {
        super(seq);
        Enumeration e = seq.getObjects();
        id = (DERObjectIdentifier)e.nextElement();
        ASN1Sequence params = (ASN1Sequence)e.nextElement();
        e = params.getObjects();
        octStr = (ASN1OctetString)e.nextElement();
        iterationCount = (DERInteger)e.nextElement();
        if(e.hasMoreElements())
            keyLength = (DERInteger)e.nextElement();
        else
            keyLength = null;
    }

    public byte[] getSalt()
    {
        return octStr.getOctets();
    }

    public BigInteger getIterationCount()
    {
        return iterationCount.getValue();
    }

    public BigInteger getKeyLength()
    {
        if(keyLength != null)
            return keyLength.getValue();
        else
            return null;
    }

    public DERObject getDERObject()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();
        ASN1EncodableVector subV = new ASN1EncodableVector();
        v.add(id);
        subV.add(octStr);
        subV.add(iterationCount);
        if(keyLength != null)
            subV.add(keyLength);
        v.add(new DERSequence(subV));
        return new DERSequence(v);
    }
}