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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Alexander Y. Kleymenov
* @version $Revision$
*/
package org.apache.harmony.security.provider.cert;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Principal;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateExpiredException;
import java.security.cert.CertificateNotYetValidException;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.Date;
import java.util.List;
import java.util.Set;
import javax.security.auth.x500.X500Principal;
import org.apache.harmony.security.utils.AlgNameMapper;
import org.apache.harmony.security.x509.Certificate;
import org.apache.harmony.security.x509.Extension;
import org.apache.harmony.security.x509.Extensions;
import org.apache.harmony.security.x509.TBSCertificate;
/**
* This class is an implementation of X509Certificate. It wraps
* the instance of org.apache.harmony.security.x509.Certificate
* built on the base of provided ASN.1 DER encoded form of
* Certificate structure (as specified in RFC 3280
* http://www.ietf.org/rfc/rfc3280.txt).
* @see org.apache.harmony.security.x509.Certificate
* @see java.security.cert.X509Certificate
*/
public final class X509CertImpl extends X509Certificate {
/** @serial */
private static final long serialVersionUID = 2972248729446736154L;
/** the core object to be wrapped in X509Certificate */
private final Certificate certificate;
private final TBSCertificate tbsCert;
private final Extensions extensions;
// to speed up access to the info, the following fields
// cache values retrieved from the certificate object,
// initialized using the "single-check idiom".
private volatile long notBefore = -1;
private volatile long notAfter = -1;
private volatile BigInteger serialNumber;
private volatile X500Principal issuer;
private volatile X500Principal subject;
private volatile byte[] tbsCertificate;
private volatile byte[] signature;
private volatile String sigAlgName;
private volatile String sigAlgOID;
private volatile byte[] sigAlgParams;
// indicates whether the signature algorithm parameters are null
private volatile boolean nullSigAlgParams;
private volatile PublicKey publicKey;
// encoding of the certificate
private volatile byte[] encoding;
/**
* Constructs the instance on the base of ASN.1 encoded
* form of X.509 certificate provided via stream parameter.
* @param in input stream containing ASN.1 encoded form of certificate.
* @throws CertificateException if some decoding problems occur.
*/
public X509CertImpl(InputStream in) throws CertificateException {
try {
// decode the Certificate object
this.certificate = (Certificate) Certificate.ASN1.decode(in);
// cache the values of TBSCertificate and Extensions
this.tbsCert = certificate.getTbsCertificate();
this.extensions = tbsCert.getExtensions();
} catch (IOException e) {
throw new CertificateException(e);
}
}
/**
* Constructs the instance on the base of existing Certificate object to
* be wrapped.
*/
public X509CertImpl(Certificate certificate) {
this.certificate = certificate;
// cache the values of TBSCertificate and Extensions
this.tbsCert = certificate.getTbsCertificate();
this.extensions = tbsCert.getExtensions();
}
/**
* Constructs the instance on the base of ASN.1 encoded
* form of X.509 certificate provided via array of bytes.
* @param encoding byte array containing ASN.1 encoded form of certificate.
* @throws IOException if some decoding problems occur.
*/
public X509CertImpl(byte[] encoding) throws IOException {
this((Certificate) Certificate.ASN1.decode(encoding));
}
public void checkValidity()
throws CertificateExpiredException, CertificateNotYetValidException {
checkValidity(System.currentTimeMillis());
}
public void checkValidity(Date date)
throws CertificateExpiredException, CertificateNotYetValidException {
checkValidity(date.getTime());
}
private void checkValidity(long time)
throws CertificateExpiredException, CertificateNotYetValidException {
if (time < getNotBeforeInternal()) {
throw new CertificateNotYetValidException("current time: " + new Date(time)
+ ", validation time: " + new Date(getNotBeforeInternal()));
}
if (time > getNotAfterInternal()) {
throw new CertificateExpiredException("current time: " + new Date(time)
+ ", expiration time: " + new Date(getNotAfterInternal()));
}
}
public int getVersion() {
return tbsCert.getVersion() + 1;
}
public BigInteger getSerialNumber() {
BigInteger result = serialNumber;
if (result == null) {
serialNumber = result = tbsCert.getSerialNumber();
}
return result;
}
public Principal getIssuerDN() {
return getIssuerX500Principal();
}
public X500Principal getIssuerX500Principal() {
X500Principal result = issuer;
if (result == null) {
// retrieve the issuer's principal
issuer = result = tbsCert.getIssuer().getX500Principal();
}
return result;
}
public Principal getSubjectDN() {
return getSubjectX500Principal();
}
public X500Principal getSubjectX500Principal() {
X500Principal result = subject;
if (result == null) {
// retrieve the subject's principal
subject = result = tbsCert.getSubject().getX500Principal();
}
return result;
}
public Date getNotBefore() {
return new Date(getNotBeforeInternal());
}
private long getNotBeforeInternal() {
long result = notBefore;
if (result == -1) {
notBefore = result = tbsCert.getValidity().getNotBefore().getTime();
}
return result;
}
public Date getNotAfter() {
return new Date(getNotAfterInternal());
}
private long getNotAfterInternal() {
long result = notAfter;
if (result == -1) {
notAfter = result = tbsCert.getValidity().getNotAfter().getTime();
}
return result;
}
public byte[] getTBSCertificate() throws CertificateEncodingException {
return getTbsCertificateInternal().clone();
}
private byte[] getTbsCertificateInternal() {
byte[] result = tbsCertificate;
if (result == null) {
tbsCertificate = result = tbsCert.getEncoded();
}
return result;
}
public byte[] getSignature() {
return getSignatureInternal().clone();
}
private byte[] getSignatureInternal() {
byte[] result = signature;
if (result == null) {
signature = result = certificate.getSignatureValue();
}
return result;
}
public String getSigAlgName() {
String result = sigAlgName;
if (result == null) {
String sigAlgOIDLocal = getSigAlgOID();
// retrieve the name of the signing algorithm
result = AlgNameMapper.map2AlgName(sigAlgOIDLocal);
if (result == null) {
// if could not be found, use OID as a name
result = sigAlgOIDLocal;
}
sigAlgName = result;
}
return result;
}
public String getSigAlgOID() {
String result = sigAlgOID;
if (result == null) {
// if info was not retrieved (and cached), do it:
sigAlgOID = result = tbsCert.getSignature().getAlgorithm();
}
return result;
}
public byte[] getSigAlgParams() {
if (nullSigAlgParams) {
return null;
}
byte[] result = sigAlgParams;
if (result == null) {
result = tbsCert.getSignature().getParameters();
if (result == null) {
nullSigAlgParams = true;
return null;
}
sigAlgParams = result;
}
return result;
}
public boolean[] getIssuerUniqueID() {
return tbsCert.getIssuerUniqueID();
}
public boolean[] getSubjectUniqueID() {
return tbsCert.getSubjectUniqueID();
}
public boolean[] getKeyUsage() {
if (extensions == null) {
return null;
}
return extensions.valueOfKeyUsage();
}
public List getExtendedKeyUsage()
throws CertificateParsingException {
if (extensions == null) {
return null;
}
try {
return extensions.valueOfExtendedKeyUsage();
} catch (IOException e) {
throw new CertificateParsingException(e);
}
}
public int getBasicConstraints() {
if (extensions == null) {
return -1;
}
return extensions.valueOfBasicConstraints();
}
public Collection> getSubjectAlternativeNames() throws CertificateParsingException {
if (extensions == null) {
return null;
}
try {
// Retrieve the extension value from the cached extensions object
// This extension is not checked for correctness during
// certificate generation, so now it can throw exception
return extensions.valueOfSubjectAlternativeName();
} catch (IOException e) {
throw new CertificateParsingException(e);
}
}
/**
* @see java.security.cert.X509Certificate#getIssuerAlternativeNames()
* method documentation for more information.
*/
public Collection> getIssuerAlternativeNames() throws CertificateParsingException {
if (extensions == null) {
return null;
}
try {
// Retrieve the extension value from the cached extensions object
// This extension is not checked for correctness during
// certificate generation, so now it can throw exception
return extensions.valueOfIssuerAlternativeName();
} catch (IOException e) {
throw new CertificateParsingException(e);
}
}
@Override public byte[] getEncoded() throws CertificateEncodingException {
return getEncodedInternal().clone();
}
private byte[] getEncodedInternal() throws CertificateEncodingException {
byte[] result = encoding;
if (encoding == null) {
encoding = result = certificate.getEncoded();
}
return result;
}
@Override public PublicKey getPublicKey() {
PublicKey result = publicKey;
if (result == null) {
publicKey = result = tbsCert.getSubjectPublicKeyInfo().getPublicKey();
}
return result;
}
@Override public String toString() {
return certificate.toString();
}
@Override public void verify(PublicKey key)
throws CertificateException, NoSuchAlgorithmException, InvalidKeyException,
NoSuchProviderException, SignatureException {
Signature signature = Signature.getInstance(getSigAlgName());
signature.initVerify(key);
// retrieve the encoding of the TBSCertificate structure
byte[] tbsCertificateLocal = getTbsCertificateInternal();
// compute and verify the signature
signature.update(tbsCertificateLocal, 0, tbsCertificateLocal.length);
if (!signature.verify(certificate.getSignatureValue())) {
throw new SignatureException("Signature was not verified");
}
}
@Override public void verify(PublicKey key, String sigProvider)
throws CertificateException, NoSuchAlgorithmException, InvalidKeyException,
NoSuchProviderException, SignatureException {
Signature signature = Signature.getInstance(getSigAlgName(), sigProvider);
signature.initVerify(key);
// retrieve the encoding of the TBSCertificate structure
byte[] tbsCertificateLocal = getTbsCertificateInternal();
// compute and verify the signature
signature.update(tbsCertificateLocal, 0, tbsCertificateLocal.length);
if (!signature.verify(certificate.getSignatureValue())) {
throw new SignatureException("Signature was not verified");
}
}
@Override public Set getNonCriticalExtensionOIDs() {
if (extensions == null) {
return null;
}
// retrieve the info from the cached extensions object
return extensions.getNonCriticalExtensions();
}
@Override public Set getCriticalExtensionOIDs() {
if (extensions == null) {
return null;
}
// retrieve the info from the cached extensions object
return extensions.getCriticalExtensions();
}
@Override public byte[] getExtensionValue(String oid) {
if (extensions == null) {
return null;
}
// retrieve the info from the cached extensions object
Extension ext = extensions.getExtensionByOID(oid);
return (ext == null) ? null : ext.getRawExtnValue();
}
@Override public boolean hasUnsupportedCriticalExtension() {
if (extensions == null) {
return false;
}
// retrieve the info from the cached extensions object
return extensions.hasUnsupportedCritical();
}
}
