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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 1.5 to JDK 1.8 with debug enabled.

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package org.bouncycastle.jce;

import java.io.IOException;
import java.security.cert.CRLException;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509CRL;
import java.security.cert.X509Certificate;

import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.x509.TBSCertList;
import org.bouncycastle.asn1.x509.TBSCertificateStructure;
import org.bouncycastle.asn1.x509.X509Name;

/**
 * a utility class that will extract X509Principal objects from X.509 certificates.
 * 

* Use this in preference to trying to recreate a principal from a String, not all * DNs are what they should be, so it's best to leave them encoded where they * can be. */ public class PrincipalUtil { /** * return the issuer of the given cert as an X509PrincipalObject. */ public static X509Principal getIssuerX509Principal( X509Certificate cert) throws CertificateEncodingException { try { TBSCertificateStructure tbsCert = TBSCertificateStructure.getInstance( ASN1Primitive.fromByteArray(cert.getTBSCertificate())); return new X509Principal(X509Name.getInstance(tbsCert.getIssuer())); } catch (IOException e) { throw new CertificateEncodingException(e.toString()); } } /** * return the subject of the given cert as an X509PrincipalObject. */ public static X509Principal getSubjectX509Principal( X509Certificate cert) throws CertificateEncodingException { try { TBSCertificateStructure tbsCert = TBSCertificateStructure.getInstance( ASN1Primitive.fromByteArray(cert.getTBSCertificate())); return new X509Principal(X509Name.getInstance(tbsCert.getSubject())); } catch (IOException e) { throw new CertificateEncodingException(e.toString()); } } /** * return the issuer of the given CRL as an X509PrincipalObject. */ public static X509Principal getIssuerX509Principal( X509CRL crl) throws CRLException { try { TBSCertList tbsCertList = TBSCertList.getInstance( ASN1Primitive.fromByteArray(crl.getTBSCertList())); return new X509Principal(X509Name.getInstance(tbsCertList.getIssuer())); } catch (IOException e) { throw new CRLException(e.toString()); } } }





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