subjectpublickeyinfo.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:   SubjectPublicKeyInfo.java

package jit.asn1.x509;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Enumeration;
import jit.asn1.*;

// Referenced classes of package jit.asn1.x509:
//            AlgorithmIdentifier

public class SubjectPublicKeyInfo
    implements DEREncodable
{

    private AlgorithmIdentifier algId;
    private DERBitString keyData;

    public static SubjectPublicKeyInfo getInstance(ASN1TaggedObject obj, boolean explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    public static SubjectPublicKeyInfo getInstance(Object obj)
    {
        if(obj instanceof SubjectPublicKeyInfo)
            return (SubjectPublicKeyInfo)obj;
        if(obj instanceof ASN1Sequence)
            return new SubjectPublicKeyInfo((ASN1Sequence)obj);
        else
            throw new IllegalArgumentException("unknown object in factory");
    }

    public SubjectPublicKeyInfo(AlgorithmIdentifier algId, DEREncodable publicKey)
    {
        keyData = new DERBitString(publicKey);
        this.algId = algId;
    }

    public SubjectPublicKeyInfo(AlgorithmIdentifier algId, byte publicKey[])
    {
        keyData = new DERBitString(publicKey);
        this.algId = algId;
    }

    public SubjectPublicKeyInfo(ASN1Sequence seq)
    {
        Enumeration e = seq.getObjects();
        algId = AlgorithmIdentifier.getInstance(e.nextElement());
        keyData = (DERBitString)e.nextElement();
    }

    public AlgorithmIdentifier getAlgorithmId()
    {
        return algId;
    }

    public DERObject getPublicKey()
        throws IOException
    {
        ByteArrayInputStream bIn = new ByteArrayInputStream(keyData.getBytes());
        DERInputStream dIn = new DERInputStream(bIn);
        return dIn.readObject();
    }

    public DERBitString getPublicKeyData()
    {
        return keyData;
    }

    public DERObject getDERObject()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(algId);
        v.add(keyData);
        return new DERSequence(v);
    }
}