org.bouncycastle.jce.provider.X509CertPairParser Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcprov-ext-debug-jdk18on Show documentation

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 Java 1.8 and later with debug enabled.

The newest version!

package org.bouncycastle.jce.provider;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.cert.CertificateParsingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.x509.CertificatePair;
import org.bouncycastle.x509.X509CertificatePair;
import org.bouncycastle.x509.X509StreamParserSpi;
import org.bouncycastle.x509.util.StreamParsingException;

public class X509CertPairParser
    extends X509StreamParserSpi
{
    private InputStream currentStream = null;

    private X509CertificatePair readDERCrossCertificatePair(
        InputStream in)
        throws IOException, CertificateParsingException
    {
        ASN1InputStream dIn = new ASN1InputStream(in);
        ASN1Sequence seq = (ASN1Sequence)dIn.readObject();
        CertificatePair pair = CertificatePair.getInstance(seq);
        return new X509CertificatePair(pair);
    }

    public void engineInit(InputStream in)
    {
        currentStream = in;

        if (!currentStream.markSupported())
        {
            currentStream = new BufferedInputStream(currentStream);
        }
    }

    public Object engineRead() throws StreamParsingException
    {
        try
        {

            currentStream.mark(10);
            int tag = currentStream.read();

            if (tag == -1)
            {
                return null;
            }

            currentStream.reset();
            return readDERCrossCertificatePair(currentStream);
        }
        catch (Exception e)
        {
            throw new StreamParsingException(e.toString(), e);
        }
    }

    public Collection engineReadAll() throws StreamParsingException
    {
        X509CertificatePair pair;
        List certs = new ArrayList();

        while ((pair = (X509CertificatePair)engineRead()) != null)
        {
            certs.add(pair);
        }

        return certs;
    }
}