/*************************************************************************
* *
* EJBCA: The OpenSource Certificate Authority *
* *
* This software is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or any later version. *
* *
* See terms of license at gnu.org. *
* *
*************************************************************************/
package org.ejbca.core.model.ca.certextensions.standard;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import org.apache.log4j.Logger;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.ejbca.core.model.ca.caadmin.CA;
import org.ejbca.core.model.ca.certextensions.CertificateExtensionException;
import org.ejbca.core.model.ca.certextensions.CertificateExtentionConfigurationException;
import org.ejbca.core.model.ca.certificateprofiles.CertificateProfile;
import org.ejbca.core.model.ra.UserDataVO;
import org.ejbca.util.CertTools;
/**
*
* Class for standard X509 certificate extension.
* See rfc3280 or later for spec of this extension.
*
* @author: Tomas Gustavsson
* @version $Id: AuthorityKeyIdentifier.java 11882 2011-05-04 08:49:33Z anatom $
*/
public class AuthorityKeyIdentifier extends StandardCertificateExtension {
private static final Logger log = Logger.getLogger(AuthorityInformationAccess.class);
@Override
public void init(final CertificateProfile certProf) {
super.setOID(X509Extensions.AuthorityKeyIdentifier.getId());
super.setCriticalFlag(certProf.getAuthorityKeyIdentifierCritical());
}
@Override
public DEREncodable getValue(final UserDataVO subject, final CA ca, final CertificateProfile certProfile, final PublicKey userPublicKey, final PublicKey caPublicKey ) throws CertificateExtentionConfigurationException, CertificateExtensionException {
org.bouncycastle.asn1.x509.AuthorityKeyIdentifier ret = null;
// Default value is that we calculate it from scratch!
// (If this is a root CA we must calculate the AuthorityKeyIdentifier from scratch)
// (If the CA signing this cert does not have a SubjectKeyIdentifier we must calculate the AuthorityKeyIdentifier from scratch)
try{
final byte[] keybytes = caPublicKey.getEncoded();
final SubjectPublicKeyInfo apki = new SubjectPublicKeyInfo((ASN1Sequence) new ASN1InputStream(new ByteArrayInputStream(keybytes)).readObject());
ret = new org.bouncycastle.asn1.x509.AuthorityKeyIdentifier(apki);
// If we have a CA-certificate (i.e. this is not a Root CA), we must take the authority key identifier from
// the CA-certificates SubjectKeyIdentifier if it exists. If we don't do that we will get the wrong identifier if the
// CA does not follow RFC3280 (guess if MS-CA follows RFC3280?)
final X509Certificate cacert = (X509Certificate)ca.getCACertificate();
final boolean isRootCA = (certProfile.getType() == CertificateProfile.TYPE_ROOTCA);
if ( (cacert != null) && (!isRootCA) ) {
byte[] akibytes;
akibytes = CertTools.getSubjectKeyId(cacert);
if (akibytes != null) {
// TODO: The code below is snipped from AuthorityKeyIdentifier.java in BC 1.36, because there is no method there
// to set only a pre-computed key identifier
// This should be replaced when such a method is added to BC
final ASN1OctetString keyidentifier = new DEROctetString(akibytes);
final ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERTaggedObject(false, 0, keyidentifier));
final ASN1Sequence seq = new DERSequence(v);
ret = new org.bouncycastle.asn1.x509.AuthorityKeyIdentifier(seq);
log.debug("Using AuthorityKeyIdentifier from CA-certificates SubjectKeyIdentifier.");
}
}
} catch (IOException e) {
throw new CertificateExtensionException("IOException parsing CA public key: "+e.getMessage(), e);
}
if (ret == null) {
log.error("AuthorityKeyIdentifier is used, but no key identifier can be created!");
}
return ret;
}
}