messageimprint.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:   MessageImprint.java

package jit.timestamp;

import jit.asn1.*;
import jit.asn1.x509.AlgorithmIdentifier;

public class MessageImprint
    implements DEREncodable
{

    private AlgorithmIdentifier hashAlg;
    private DEROctetString hashedMessage;

    public MessageImprint(DERObjectIdentifier hashAlgOID, byte hashValue[])
        throws Exception
    {
        hashAlg = null;
        hashedMessage = null;
        if(hashAlgOID == null)
            throw new Exception("hashAlgOID must not be null");
        hashAlg = new AlgorithmIdentifier(hashAlgOID);
        if(hashValue == null)
        {
            throw new Exception("hashValue must not be null");
        } else
        {
            hashedMessage = new DEROctetString(hashValue);
            return;
        }
    }

    public MessageImprint(AlgorithmIdentifier hashAlg, DEROctetString hashedMessage)
        throws Exception
    {
        this.hashAlg = null;
        this.hashedMessage = null;
        if(hashAlg == null)
            throw new Exception("hashAlg must not be null");
        this.hashAlg = hashAlg;
        if(hashedMessage == null)
        {
            throw new Exception("hashedMessage must not be null");
        } else
        {
            this.hashedMessage = hashedMessage;
            return;
        }
    }

    public MessageImprint(ASN1Sequence seq)
        throws Exception
    {
        hashAlg = null;
        hashedMessage = null;
        if(seq.size() != 2)
        {
            throw new Exception("construct MessageImprint error: wrong number of elements in sequence");
        } else
        {
            hashAlg = AlgorithmIdentifier.getInstance(seq.getObjectAt(0));
            hashedMessage = (DEROctetString)seq.getObjectAt(1);
            return;
        }
    }

    public DERObjectIdentifier getHashAlg()
    {
        return hashAlg.getObjectId();
    }

    public byte[] getHashedMessage()
        throws Exception
    {
        return hashedMessage.getOctets();
    }

    public DERObject getDERObject()
    {
        DEREncodableVector v = new DEREncodableVector();
        v.add(hashAlg);
        v.add(hashedMessage);
        return new DERSequence(v);
    }
}