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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.

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package org.bouncycastle.crypto.tls;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Vector;

import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1Primitive;

/**
 * Parsing and encoding of a Certificate struct from RFC 4346.
 *  
 * opaque ASN.1Cert<2^24-1>;
 *
 * struct {
 *     ASN.1Cert certificate_list<0..2^24-1>;
 * } Certificate;
 *


 *
 * @see org.bouncycastle.asn1.x509.Certificate
 *
 * @deprecated Migrate to the (D)TLS API in org.bouncycastle.tls (bctls jar).
 */
public class Certificate
{
    public static final Certificate EMPTY_CHAIN = new Certificate(
        new org.bouncycastle.asn1.x509.Certificate[0]);

    protected org.bouncycastle.asn1.x509.Certificate[] certificateList;

    public Certificate(org.bouncycastle.asn1.x509.Certificate[] certificateList)
    {
        if (certificateList == null)
        {
            throw new IllegalArgumentException("'certificateList' cannot be null");
        }

        this.certificateList = certificateList;
    }

    /**
     * @return an array of {@link org.bouncycastle.asn1.x509.Certificate} representing a certificate
     *         chain.
     */
    public org.bouncycastle.asn1.x509.Certificate[] getCertificateList()
    {
        return cloneCertificateList();
    }

    public org.bouncycastle.asn1.x509.Certificate getCertificateAt(int index)
    {
        return certificateList[index];
    }

    public int getLength()
    {
        return certificateList.length;
    }

    /**
     * @return  true

if this certificate chain contains no certificates, or * false otherwise. */ public boolean isEmpty() { return certificateList.length == 0; } /** * Encode this {@link Certificate} to an {@link OutputStream}. * * @param output the {@link OutputStream} to encode to. * @throws IOException */ public void encode(OutputStream output) throws IOException { Vector derEncodings = new Vector(this.certificateList.length); int totalLength = 0; for (int i = 0; i < this.certificateList.length; ++i) { byte[] derEncoding = certificateList[i].getEncoded(ASN1Encoding.DER); derEncodings.addElement(derEncoding); totalLength += derEncoding.length + 3; } TlsUtils.checkUint24(totalLength); TlsUtils.writeUint24(totalLength, output); for (int i = 0; i < derEncodings.size(); ++i) { byte[] derEncoding = (byte[])derEncodings.elementAt(i); TlsUtils.writeOpaque24(derEncoding, output); } } /** * Parse a {@link Certificate} from an {@link InputStream}. * * @param input the {@link InputStream} to parse from. * @return a {@link Certificate} object. * @throws IOException */ public static Certificate parse(InputStream input) throws IOException { int totalLength = TlsUtils.readUint24(input); if (totalLength == 0) { return EMPTY_CHAIN; } byte[] certListData = TlsUtils.readFully(totalLength, input); ByteArrayInputStream buf = new ByteArrayInputStream(certListData); Vector certificate_list = new Vector(); while (buf.available() > 0) { byte[] berEncoding = TlsUtils.readOpaque24(buf); ASN1Primitive asn1Cert = TlsUtils.readASN1Object(berEncoding); certificate_list.addElement(org.bouncycastle.asn1.x509.Certificate.getInstance(asn1Cert)); } org.bouncycastle.asn1.x509.Certificate[] certificateList = new org.bouncycastle.asn1.x509.Certificate[certificate_list.size()]; for (int i = 0; i < certificate_list.size(); i++) { certificateList[i] = (org.bouncycastle.asn1.x509.Certificate)certificate_list.elementAt(i); } return new Certificate(certificateList); } protected org.bouncycastle.asn1.x509.Certificate[] cloneCertificateList() { org.bouncycastle.asn1.x509.Certificate[] result = new org.bouncycastle.asn1.x509.Certificate[certificateList.length]; System.arraycopy(certificateList, 0, result, 0, result.length); return result; } }