pkixcertpath.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   PKIXCertPath.java

package org.bouncycastle.jce.provider;

import java.io.*;
import java.security.NoSuchProviderException;
import java.security.cert.*;
import java.util.*;
import org.bouncycastle.asn1.*;

public class PKIXCertPath extends CertPath
{

	static final List certPathEncodings;
	private List certificates;

	PKIXCertPath(List certificates)
	{
		super("X.509");
		this.certificates = new ArrayList(certificates);
	}

	PKIXCertPath(InputStream inStream, String encoding)
		throws CertificateException
	{
		super("X.509");
		try
		{
			if (encoding.equals("PkiPath"))
			{
				DERInputStream derInStream = new DERInputStream(inStream);
				DERObject derObject = derInStream.readObject();
				if (derObject == null || !(derObject instanceof ASN1Sequence))
					throw new CertificateException("input stream does not contain a ASN1 SEQUENCE while reading PkiPath encoded data to load CertPath");
				Enumeration enumx = ((ASN1Sequence)derObject).getObjects();
				certificates = new ArrayList();
				CertificateFactory certFactory = CertificateFactory.getInstance("X.509", "BC");
				InputStream certInStream;
				for (; enumx.hasMoreElements(); certificates.add(0, certFactory.generateCertificate(certInStream)))
				{
					ByteArrayOutputStream outStream = new ByteArrayOutputStream();
					DEROutputStream derOutStream = new DEROutputStream(outStream);
					derOutStream.writeObject(enumx.nextElement());
					derOutStream.close();
					certInStream = new ByteArrayInputStream(outStream.toByteArray());
				}

			} else
			{
				throw new CertificateException("unsupported encoding");
			}
		}
		catch (IOException ex)
		{
			throw new CertificateException((new StringBuilder()).append("IOException throw while decoding CertPath:\n").append(ex.toString()).toString());
		}
		catch (NoSuchProviderException ex)
		{
			throw new CertificateException((new StringBuilder()).append("BouncyCastle provider not found while trying to get a CertificateFactory:\n").append(ex.toString()).toString());
		}
	}

	public Iterator getEncodings()
	{
		return certPathEncodings.iterator();
	}

	public byte[] getEncoded()
		throws CertificateEncodingException
	{
		Iterator iter = getEncodings();
		if (iter.hasNext())
		{
			Object enc = iter.next();
			if (enc instanceof String)
				return getEncoded((String)enc);
		}
		return null;
	}

	public byte[] getEncoded(String encoding)
		throws CertificateEncodingException
	{
		DERObject encoded = null;
		if (encoding.equals("PkiPath"))
		{
			ASN1EncodableVector v = new ASN1EncodableVector();
			for (ListIterator iter = certificates.listIterator(certificates.size()); iter.hasPrevious(); v.add(getEncodedX509Certificate((X509Certificate)iter.previous())));
			encoded = new DERSequence(v);
		} else
		{
			throw new CertificateEncodingException("unsupported encoding");
		}
		if (encoded == null)
			return null;
		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		DEROutputStream derOutStream = new DEROutputStream(outStream);
		try
		{
			derOutStream.writeObject(encoded);
			derOutStream.close();
		}
		catch (IOException ex)
		{
			throw new CertificateEncodingException((new StringBuilder()).append("IOExeption thrown: ").append(ex.toString()).toString());
		}
		return outStream.toByteArray();
	}

	public List getCertificates()
	{
		return new ArrayList(certificates);
	}

	private DERObject getEncodedX509Certificate(X509Certificate cert)
		throws CertificateEncodingException
	{
		DERInputStream derInStream;
		ByteArrayInputStream inStream = new ByteArrayInputStream(cert.getEncoded());
		derInStream = new DERInputStream(inStream);
		return derInStream.readObject();
		IOException ex;
		ex;
		throw new CertificateEncodingException((new StringBuilder()).append("IOException caught while encoding certificate\n").append(ex.toString()).toString());
	}

	static 
	{
		List encodings = new ArrayList();
		encodings.add("PkiPath");
		certPathEncodings = Collections.unmodifiableList(encodings);
	}
}