/*
* Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.security.x509;
import java.io.BufferedReader;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.math.BigInteger;
import java.security.*;
import java.security.cert.*;
import java.security.cert.Certificate;
import java.util.*;
import javax.security.auth.x500.X500Principal;
import sun.misc.HexDumpEncoder;
import sun.misc.BASE64Decoder;
import sun.security.util.*;
import sun.security.provider.X509Factory;
/**
* The X509CertImpl class represents an X.509 certificate. These certificates
* are widely used to support authentication and other functionality in
* Internet security systems. Common applications include Privacy Enhanced
* Mail (PEM), Transport Layer Security (SSL), code signing for trusted
* software distribution, and Secure Electronic Transactions (SET). There
* is a commercial infrastructure ready to manage large scale deployments
* of X.509 identity certificates.
*
* <P>These certificates are managed and vouched for by <em>Certificate
* Authorities</em> (CAs). CAs are services which create certificates by
* placing data in the X.509 standard format and then digitally signing
* that data. Such signatures are quite difficult to forge. CAs act as
* trusted third parties, making introductions between agents who have no
* direct knowledge of each other. CA certificates are either signed by
* themselves, or by some other CA such as a "root" CA.
*
* <P>RFC 1422 is very informative, though it does not describe much
* of the recent work being done with X.509 certificates. That includes
* a 1996 version (X.509v3) and a variety of enhancements being made to
* facilitate an explosion of personal certificates used as "Internet
* Drivers' Licences", or with SET for credit card transactions.
*
* <P>More recent work includes the IETF PKIX Working Group efforts,
* especially RFC2459.
*
* @author Dave Brownell
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @see X509CertInfo
*/
public class X509CertImpl extends X509Certificate implements DerEncoder {
private static final long serialVersionUID = -3457612960190864406L;
private static final String DOT = ".";
/**
* Public attribute names.
*/
public static final String NAME = "x509";
public static final String INFO = X509CertInfo.NAME;
public static final String ALG_ID = "algorithm";
public static final String SIGNATURE = "signature";
public static final String SIGNED_CERT = "signed_cert";
/**
* The following are defined for ease-of-use. These
* are the most frequently retrieved attributes.
*/
// x509.info.subject.dname
public static final String SUBJECT_DN = NAME + DOT + INFO + DOT +
X509CertInfo.SUBJECT + DOT +
CertificateSubjectName.DN_NAME;
// x509.info.issuer.dname
public static final String ISSUER_DN = NAME + DOT + INFO + DOT +
X509CertInfo.ISSUER + DOT +
CertificateIssuerName.DN_NAME;
// x509.info.serialNumber.number
public static final String SERIAL_ID = NAME + DOT + INFO + DOT +
X509CertInfo.SERIAL_NUMBER + DOT +
CertificateSerialNumber.NUMBER;
// x509.info.key.value
public static final String PUBLIC_KEY = NAME + DOT + INFO + DOT +
X509CertInfo.KEY + DOT +
CertificateX509Key.KEY;
// x509.info.version.value
public static final String VERSION = NAME + DOT + INFO + DOT +
X509CertInfo.VERSION + DOT +
CertificateVersion.VERSION;
// x509.algorithm
public static final String SIG_ALG = NAME + DOT + ALG_ID;
// x509.signature
public static final String SIG = NAME + DOT + SIGNATURE;
// when we sign and decode we set this to true
// this is our means to make certificates immutable
private boolean readOnly = false;
// Certificate data, and its envelope
private byte[] signedCert = null;
protected X509CertInfo info = null;
protected AlgorithmId algId = null;
protected byte[] signature = null;
// recognized extension OIDS
private static final String KEY_USAGE_OID = "2.5.29.15";
private static final String EXTENDED_KEY_USAGE_OID = "2.5.29.37";
private static final String BASIC_CONSTRAINT_OID = "2.5.29.19";
private static final String SUBJECT_ALT_NAME_OID = "2.5.29.17";
private static final String ISSUER_ALT_NAME_OID = "2.5.29.18";
private static final String AUTH_INFO_ACCESS_OID = "1.3.6.1.5.5.7.1.1";
// number of standard key usage bits.
private static final int NUM_STANDARD_KEY_USAGE = 9;
// SubjectAlterntativeNames cache
private Collection<List<?>> subjectAlternativeNames;
// IssuerAlternativeNames cache
private Collection<List<?>> issuerAlternativeNames;
// ExtendedKeyUsage cache
private List<String> extKeyUsage;
// AuthorityInformationAccess cache
private Set<AccessDescription> authInfoAccess;
/**
* PublicKey that has previously been used to verify
* the signature of this certificate. Null if the certificate has not
* yet been verified.
*/
private PublicKey verifiedPublicKey;
/**
* If verifiedPublicKey is not null, name of the provider used to
* successfully verify the signature of this certificate, or the
* empty String if no provider was explicitly specified.
*/
private String verifiedProvider;
/**
* If verifiedPublicKey is not null, result of the verification using
* verifiedPublicKey and verifiedProvider. If true, verification was
* successful, if false, it failed.
*/
private boolean verificationResult;
/**
* Default constructor.
*/
public X509CertImpl() { }
/**
* Unmarshals a certificate from its encoded form, parsing the
* encoded bytes. This form of constructor is used by agents which
* need to examine and use certificate contents. That is, this is
* one of the more commonly used constructors. Note that the buffer
* must include only a certificate, and no "garbage" may be left at
* the end. If you need to ignore data at the end of a certificate,
* use another constructor.
*
* @param certData the encoded bytes, with no trailing padding.
* @exception CertificateException on parsing and initialization errors.
*/
public X509CertImpl(byte[] certData) throws CertificateException {
try {
parse(new DerValue(certData));
} catch (IOException e) {
signedCert = null;
CertificateException ce = new
CertificateException("Unable to initialize, " + e);
ce.initCause(e);
throw ce;
}
}
/**
* unmarshals an X.509 certificate from an input stream. If the
* certificate is RFC1421 hex-encoded, then it must begin with
* the line X509Factory.BEGIN_CERT and end with the line
* X509Factory.END_CERT.
*
* @param in an input stream holding at least one certificate that may
* be either DER-encoded or RFC1421 hex-encoded version of the
* DER-encoded certificate.
* @exception CertificateException on parsing and initialization errors.
*/
public X509CertImpl(InputStream in) throws CertificateException {
DerValue der = null;
BufferedInputStream inBuffered = new BufferedInputStream(in);
// First try reading stream as HEX-encoded DER-encoded bytes,
// since not mistakable for raw DER
try {
inBuffered.mark(Integer.MAX_VALUE);
der = readRFC1421Cert(inBuffered);
} catch (IOException ioe) {
try {
// Next, try reading stream as raw DER-encoded bytes
inBuffered.reset();
der = new DerValue(inBuffered);
} catch (IOException ioe1) {
CertificateException ce = new
CertificateException("Input stream must be " +
"either DER-encoded bytes " +
"or RFC1421 hex-encoded " +
"DER-encoded bytes: " +
ioe1.getMessage());
ce.initCause(ioe1);
throw ce;
}
}
try {
parse(der);
} catch (IOException ioe) {
signedCert = null;
CertificateException ce = new
CertificateException("Unable to parse DER value of " +
"certificate, " + ioe);
ce.initCause(ioe);
throw ce;
}
}
/**
* read input stream as HEX-encoded DER-encoded bytes
*
* @param in InputStream to read
* @returns DerValue corresponding to decoded HEX-encoded bytes
* @throws IOException if stream can not be interpreted as RFC1421
* encoded bytes
*/
private DerValue readRFC1421Cert(InputStream in) throws IOException {
DerValue der = null;
String line = null;
BufferedReader certBufferedReader =
new BufferedReader(new InputStreamReader(in, "ASCII"));
try {
line = certBufferedReader.readLine();
} catch (IOException ioe1) {
throw new IOException("Unable to read InputStream: " +
ioe1.getMessage());
}
if (line.equals(X509Factory.BEGIN_CERT)) {
/* stream appears to be hex-encoded bytes */
BASE64Decoder decoder = new BASE64Decoder();
ByteArrayOutputStream decstream = new ByteArrayOutputStream();
try {
while ((line = certBufferedReader.readLine()) != null) {
if (line.equals(X509Factory.END_CERT)) {
der = new DerValue(decstream.toByteArray());
break;
} else {
decstream.write(decoder.decodeBuffer(line));
}
}
} catch (IOException ioe2) {
throw new IOException("Unable to read InputStream: "
+ ioe2.getMessage());
}
} else {
throw new IOException("InputStream is not RFC1421 hex-encoded " +
"DER bytes");
}
return der;
}
/**
* Construct an initialized X509 Certificate. The certificate is stored
* in raw form and has to be signed to be useful.
*
* @params info the X509CertificateInfo which the Certificate is to be
* created from.
*/
public X509CertImpl(X509CertInfo certInfo) {
this.info = certInfo;
}
/**
* Unmarshal a certificate from its encoded form, parsing a DER value.
* This form of constructor is used by agents which need to examine
* and use certificate contents.
*
* @param derVal the der value containing the encoded cert.
* @exception CertificateException on parsing and initialization errors.
*/
public X509CertImpl(DerValue derVal) throws CertificateException {
try {
parse(derVal);
} catch (IOException e) {
signedCert = null;
CertificateException ce = new
CertificateException("Unable to initialize, " + e);
ce.initCause(e);
throw ce;
}
}
/**
* Appends the certificate to an output stream.
*
* @param out an input stream to which the certificate is appended.
* @exception CertificateEncodingException on encoding errors.
*/
public void encode(OutputStream out)
throws CertificateEncodingException {
if (signedCert == null)
throw new CertificateEncodingException(
"Null certificate to encode");
try {
out.write(signedCert.clone());
} catch (IOException e) {
throw new CertificateEncodingException(e.toString());
}
}
/**
* DER encode this object onto an output stream.
* Implements the <code>DerEncoder</code> interface.
*
* @param out the output stream on which to write the DER encoding.
*
* @exception IOException on encoding error.
*/
public void derEncode(OutputStream out) throws IOException {
if (signedCert == null)
throw new IOException("Null certificate to encode");
out.write(signedCert.clone());
}
/**
* Returns the encoded form of this certificate. It is
* assumed that each certificate type would have only a single
* form of encoding; for example, X.509 certificates would
* be encoded as ASN.1 DER.
*
* @exception CertificateEncodingException if an encoding error occurs.
*/
public byte[] getEncoded() throws CertificateEncodingException {
return getEncodedInternal().clone();
}
/**
* Returned the encoding as an uncloned byte array. Callers must
* guarantee that they neither modify it nor expose it to untrusted
* code.
*/
public byte[] getEncodedInternal() throws CertificateEncodingException {
if (signedCert == null) {
throw new CertificateEncodingException(
"Null certificate to encode");
}
return signedCert;
}
/**
* Throws an exception if the certificate was not signed using the
* verification key provided. Successfully verifying a certificate
* does <em>not</em> indicate that one should trust the entity which
* it represents.
*
* @param key the public key used for verification.
*
* @exception InvalidKeyException on incorrect key.
* @exception NoSuchAlgorithmException on unsupported signature
* algorithms.
* @exception NoSuchProviderException if there's no default provider.
* @exception SignatureException on signature errors.
* @exception CertificateException on encoding errors.
*/
public void verify(PublicKey key)
throws CertificateException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException {
verify(key, "");
}
/**
* Throws an exception if the certificate was not signed using the
* verification key provided. Successfully verifying a certificate
* does <em>not</em> indicate that one should trust the entity which
* it represents.
*
* @param key the public key used for verification.
* @param sigProvider the name of the provider.
*
* @exception NoSuchAlgorithmException on unsupported signature
* algorithms.
* @exception InvalidKeyException on incorrect key.
* @exception NoSuchProviderException on incorrect provider.
* @exception SignatureException on signature errors.
* @exception CertificateException on encoding errors.
*/
public synchronized void verify(PublicKey key, String sigProvider)
throws CertificateException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException {
if (sigProvider == null) {
sigProvider = "";
}
if ((verifiedPublicKey != null) && verifiedPublicKey.equals(key)) {
// this certificate has already been verified using
// this public key. Make sure providers match, too.
if (sigProvider.equals(verifiedProvider)) {
if (verificationResult) {
return;
} else {
throw new SignatureException("Signature does not match.");
}
}
}
if (signedCert == null) {
throw new CertificateEncodingException("Uninitialized certificate");
}
// Verify the signature ...
Signature sigVerf = null;
if (sigProvider.length() == 0) {
sigVerf = Signature.getInstance(algId.getName());
} else {
sigVerf = Signature.getInstance(algId.getName(), sigProvider);
}
sigVerf.initVerify(key);
byte[] rawCert = info.getEncodedInfo();
sigVerf.update(rawCert, 0, rawCert.length);
// verify may throw SignatureException for invalid encodings, etc.
verificationResult = sigVerf.verify(signature);
verifiedPublicKey = key;
verifiedProvider = sigProvider;
if (verificationResult == false) {
throw new SignatureException("Signature does not match.");
}
}
/**
* Creates an X.509 certificate, and signs it using the given key
* (associating a signature algorithm and an X.500 name).
* This operation is used to implement the certificate generation
* functionality of a certificate authority.
*
* @param key the private key used for signing.
* @param algorithm the name of the signature algorithm used.
*
* @exception InvalidKeyException on incorrect key.
* @exception NoSuchAlgorithmException on unsupported signature
* algorithms.
* @exception NoSuchProviderException if there's no default provider.
* @exception SignatureException on signature errors.
* @exception CertificateException on encoding errors.
*/
public void sign(PrivateKey key, String algorithm)
throws CertificateException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException {
sign(key, algorithm, null);
}
/**
* Creates an X.509 certificate, and signs it using the given key
* (associating a signature algorithm and an X.500 name).
* This operation is used to implement the certificate generation
* functionality of a certificate authority.
*
* @param key the private key used for signing.
* @param algorithm the name of the signature algorithm used.
* @param provider the name of the provider.
*
* @exception NoSuchAlgorithmException on unsupported signature
* algorithms.
* @exception InvalidKeyException on incorrect key.
* @exception NoSuchProviderException on incorrect provider.
* @exception SignatureException on signature errors.
* @exception CertificateException on encoding errors.
*/
public void sign(PrivateKey key, String algorithm, String provider)
throws CertificateException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException {
try {
if (readOnly)
throw new CertificateEncodingException(
"cannot over-write existing certificate");
Signature sigEngine = null;
if ((provider == null) || (provider.length() == 0))
sigEngine = Signature.getInstance(algorithm);
else
sigEngine = Signature.getInstance(algorithm, provider);
sigEngine.initSign(key);
// in case the name is reset
algId = AlgorithmId.get(sigEngine.getAlgorithm());
DerOutputStream out = new DerOutputStream();
DerOutputStream tmp = new DerOutputStream();
// encode certificate info
info.encode(tmp);
byte[] rawCert = tmp.toByteArray();
// encode algorithm identifier
algId.encode(tmp);
// Create and encode the signature itself.
sigEngine.update(rawCert, 0, rawCert.length);
signature = sigEngine.sign();
tmp.putBitString(signature);
// Wrap the signed data in a SEQUENCE { data, algorithm, sig }
out.write(DerValue.tag_Sequence, tmp);
signedCert = out.toByteArray();
readOnly = true;
} catch (IOException e) {
throw new CertificateEncodingException(e.toString());
}
}
/**
* Checks that the certificate is currently valid, i.e. the current
* time is within the specified validity period.
*
* @exception CertificateExpiredException if the certificate has expired.
* @exception CertificateNotYetValidException if the certificate is not
* yet valid.
*/
public void checkValidity()
throws CertificateExpiredException, CertificateNotYetValidException {
Date date = new Date();
checkValidity(date);
}
/**
* Checks that the specified date is within the certificate's
* validity period, or basically if the certificate would be
* valid at the specified date/time.
*
* @param date the Date to check against to see if this certificate
* is valid at that date/time.
*
* @exception CertificateExpiredException if the certificate has expired
* with respect to the <code>date</code> supplied.
* @exception CertificateNotYetValidException if the certificate is not
* yet valid with respect to the <code>date</code> supplied.
*/
public void checkValidity(Date date)
throws CertificateExpiredException, CertificateNotYetValidException {
CertificateValidity interval = null;
try {
interval = (CertificateValidity)info.get(CertificateValidity.NAME);
} catch (Exception e) {
throw new CertificateNotYetValidException("Incorrect validity period");
}
if (interval == null)
throw new CertificateNotYetValidException("Null validity period");
interval.valid(date);
}
/**
* Return the requested attribute from the certificate.
*
* Note that the X509CertInfo is not cloned for performance reasons.
* Callers must ensure that they do not modify it. All other
* attributes are cloned.
*
* @param name the name of the attribute.
* @exception CertificateParsingException on invalid attribute identifier.
*/
public Object get(String name)
throws CertificateParsingException {
X509AttributeName attr = new X509AttributeName(name);
String id = attr.getPrefix();
if (!(id.equalsIgnoreCase(NAME))) {
throw new CertificateParsingException("Invalid root of "
+ "attribute name, expected [" + NAME +
"], received " + "[" + id + "]");
}
attr = new X509AttributeName(attr.getSuffix());
id = attr.getPrefix();
if (id.equalsIgnoreCase(INFO)) {
if (info == null) {
return null;
}
if (attr.getSuffix() != null) {
try {
return info.get(attr.getSuffix());
} catch (IOException e) {
throw new CertificateParsingException(e.toString());
} catch (CertificateException e) {
throw new CertificateParsingException(e.toString());
}
} else {
return info;
}
} else if (id.equalsIgnoreCase(ALG_ID)) {
return(algId);
} else if (id.equalsIgnoreCase(SIGNATURE)) {
if (signature != null)
return signature.clone();
else
return null;
} else if (id.equalsIgnoreCase(SIGNED_CERT)) {
if (signedCert != null)
return signedCert.clone();
else
return null;
} else {
throw new CertificateParsingException("Attribute name not "
+ "recognized or get() not allowed for the same: " + id);
}
}
/**
* Set the requested attribute in the certificate.
*
* @param name the name of the attribute.
* @param obj the value of the attribute.
* @exception CertificateException on invalid attribute identifier.
* @exception IOException on encoding error of attribute.
*/
public void set(String name, Object obj)
throws CertificateException, IOException {
// check if immutable
if (readOnly)
throw new CertificateException("cannot over-write existing"
+ " certificate");
X509AttributeName attr = new X509AttributeName(name);
String id = attr.getPrefix();
if (!(id.equalsIgnoreCase(NAME))) {
throw new CertificateException("Invalid root of attribute name,"
+ " expected [" + NAME + "], received " + id);
}
attr = new X509AttributeName(attr.getSuffix());
id = attr.getPrefix();
if (id.equalsIgnoreCase(INFO)) {
if (attr.getSuffix() == null) {
if (!(obj instanceof X509CertInfo)) {
throw new CertificateException("Attribute value should"
+ " be of type X509CertInfo.");
}
info = (X509CertInfo)obj;
signedCert = null; //reset this as certificate data has changed
} else {
info.set(attr.getSuffix(), obj);
signedCert = null; //reset this as certificate data has changed
}
} else {
throw new CertificateException("Attribute name not recognized or " +
"set() not allowed for the same: " + id);
}
}
/**
* Delete the requested attribute from the certificate.
*
* @param name the name of the attribute.
* @exception CertificateException on invalid attribute identifier.
* @exception IOException on other errors.
*/
public void delete(String name)
throws CertificateException, IOException {
// check if immutable
if (readOnly)
throw new CertificateException("cannot over-write existing"
+ " certificate");
X509AttributeName attr = new X509AttributeName(name);
String id = attr.getPrefix();
if (!(id.equalsIgnoreCase(NAME))) {
throw new CertificateException("Invalid root of attribute name,"
+ " expected ["
+ NAME + "], received " + id);
}
attr = new X509AttributeName(attr.getSuffix());
id = attr.getPrefix();
if (id.equalsIgnoreCase(INFO)) {
if (attr.getSuffix() != null) {
info = null;
} else {
info.delete(attr.getSuffix());
}
} else if (id.equalsIgnoreCase(ALG_ID)) {
algId = null;
} else if (id.equalsIgnoreCase(SIGNATURE)) {
signature = null;
} else if (id.equalsIgnoreCase(SIGNED_CERT)) {
signedCert = null;
} else {
throw new CertificateException("Attribute name not recognized or " +
"delete() not allowed for the same: " + id);
}
}
/**
* Return an enumeration of names of attributes existing within this
* attribute.
*/
public Enumeration<String> getElements() {
AttributeNameEnumeration elements = new AttributeNameEnumeration();
elements.addElement(NAME + DOT + INFO);
elements.addElement(NAME + DOT + ALG_ID);
elements.addElement(NAME + DOT + SIGNATURE);
elements.addElement(NAME + DOT + SIGNED_CERT);
return elements.elements();
}
/**
* Return the name of this attribute.
*/
public String getName() {
return(NAME);
}
/**
* Returns a printable representation of the certificate. This does not
* contain all the information available to distinguish this from any
* other certificate. The certificate must be fully constructed
* before this function may be called.
*/
public String toString() {
if (info == null || algId == null || signature == null)
return "";
StringBuilder sb = new StringBuilder();
sb.append("[\n");
sb.append(info.toString() + "\n");
sb.append(" Algorithm: [" + algId.toString() + "]\n");
HexDumpEncoder encoder = new HexDumpEncoder();
sb.append(" Signature:\n" + encoder.encodeBuffer(signature));
sb.append("\n]");
return sb.toString();
}
// the strongly typed gets, as per java.security.cert.X509Certificate
/**
* Gets the publickey from this certificate.
*
* @return the publickey.
*/
public PublicKey getPublicKey() {
if (info == null)
return null;
try {
PublicKey key = (PublicKey)info.get(CertificateX509Key.NAME
+ DOT + CertificateX509Key.KEY);
return key;
} catch (Exception e) {
return null;
}
}
/**
* Gets the version number from the certificate.
*
* @return the version number, i.e. 1, 2 or 3.
*/
public int getVersion() {
if (info == null)
return -1;
try {
int vers = ((Integer)info.get(CertificateVersion.NAME
+ DOT + CertificateVersion.VERSION)).intValue();
return vers+1;
} catch (Exception e) {
return -1;
}
}
/**
* Gets the serial number from the certificate.
*
* @return the serial number.
*/
public BigInteger getSerialNumber() {
SerialNumber ser = getSerialNumberObject();
return ser != null ? ser.getNumber() : null;
}
/**
* Gets the serial number from the certificate as
* a SerialNumber object.
*
* @return the serial number.
*/
public SerialNumber getSerialNumberObject() {
if (info == null)
return null;
try {
SerialNumber ser = (SerialNumber)info.get(
CertificateSerialNumber.NAME + DOT +
CertificateSerialNumber.NUMBER);
return ser;
} catch (Exception e) {
return null;
}
}
/**
* Gets the subject distinguished name from the certificate.
*
* @return the subject name.
*/
public Principal getSubjectDN() {
if (info == null)
return null;
try {
Principal subject = (Principal)info.get(
CertificateSubjectName.NAME + DOT +
CertificateSubjectName.DN_NAME);
return subject;
} catch (Exception e) {
return null;
}
}
/**
* Get subject name as X500Principal. Overrides implementation in
* X509Certificate with a slightly more efficient version that is
* also aware of X509CertImpl mutability.
*/
public X500Principal getSubjectX500Principal() {
if (info == null) {
return null;
}
try {
X500Principal subject = (X500Principal)info.get(
CertificateSubjectName.NAME + DOT +
CertificateSubjectName.DN_PRINCIPAL);
return subject;
} catch (Exception e) {
return null;
}
}
/**
* Gets the issuer distinguished name from the certificate.
*
* @return the issuer name.
*/
public Principal getIssuerDN() {
if (info == null)
return null;
try {
Principal issuer = (Principal)info.get(
CertificateIssuerName.NAME + DOT +
CertificateIssuerName.DN_NAME);
return issuer;
} catch (Exception e) {
return null;
}
}
/**
* Get issuer name as X500Principal. Overrides implementation in
* X509Certificate with a slightly more efficient version that is
* also aware of X509CertImpl mutability.
*/
public X500Principal getIssuerX500Principal() {
if (info == null) {
return null;
}
try {
X500Principal issuer = (X500Principal)info.get(
CertificateIssuerName.NAME + DOT +
CertificateIssuerName.DN_PRINCIPAL);
return issuer;
} catch (Exception e) {
return null;
}
}
/**
* Gets the notBefore date from the validity period of the certificate.
*
* @return the start date of the validity period.
*/
public Date getNotBefore() {
if (info == null)
return null;
try {
Date d = (Date) info.get(CertificateValidity.NAME + DOT +
CertificateValidity.NOT_BEFORE);
return d;
} catch (Exception e) {
return null;
}
}
/**
* Gets the notAfter date from the validity period of the certificate.
*
* @return the end date of the validity period.
*/
public Date getNotAfter() {
if (info == null)
return null;
try {
Date d = (Date) info.get(CertificateValidity.NAME + DOT +
CertificateValidity.NOT_AFTER);
return d;
} catch (Exception e) {
return null;
}
}
/**
* Gets the DER encoded certificate informations, the
* <code>tbsCertificate</code> from this certificate.
* This can be used to verify the signature independently.
*
* @return the DER encoded certificate information.
* @exception CertificateEncodingException if an encoding error occurs.
*/
public byte[] getTBSCertificate() throws CertificateEncodingException {
if (info != null) {
return info.getEncodedInfo();
} else
throw new CertificateEncodingException("Uninitialized certificate");
}
/**
* Gets the raw Signature bits from the certificate.
*
* @return the signature.
*/
public byte[] getSignature() {
if (signature == null)
return null;
byte[] dup = new byte[signature.length];
System.arraycopy(signature, 0, dup, 0, dup.length);
return dup;
}
/**
* Gets the signature algorithm name for the certificate
* signature algorithm.
* For example, the string "SHA-1/DSA" or "DSS".
*
* @return the signature algorithm name.
*/
public String getSigAlgName() {
if (algId == null)
return null;
return (algId.getName());
}
/**
* Gets the signature algorithm OID string from the certificate.
* For example, the string "1.2.840.10040.4.3"
*
* @return the signature algorithm oid string.
*/
public String getSigAlgOID() {
if (algId == null)
return null;
ObjectIdentifier oid = algId.getOID();
return (oid.toString());
}
/**
* Gets the DER encoded signature algorithm parameters from this
* certificate's signature algorithm.
*
* @return the DER encoded signature algorithm parameters, or
* null if no parameters are present.
*/
public byte[] getSigAlgParams() {
if (algId == null)
return null;
try {
return algId.getEncodedParams();
} catch (IOException e) {
return null;
}
}
/**
* Gets the Issuer Unique Identity from the certificate.
*
* @return the Issuer Unique Identity.
*/
public boolean[] getIssuerUniqueID() {
if (info == null)
return null;
try {
UniqueIdentity id = (UniqueIdentity)info.get(
CertificateIssuerUniqueIdentity.NAME
+ DOT + CertificateIssuerUniqueIdentity.ID);
if (id == null)
return null;
else
return (id.getId());
} catch (Exception e) {
return null;
}
}
/**
* Gets the Subject Unique Identity from the certificate.
*
* @return the Subject Unique Identity.
*/
public boolean[] getSubjectUniqueID() {
if (info == null)
return null;
try {
UniqueIdentity id = (UniqueIdentity)info.get(
CertificateSubjectUniqueIdentity.NAME
+ DOT + CertificateSubjectUniqueIdentity.ID);
if (id == null)
return null;
else
return (id.getId());
} catch (Exception e) {
return null;
}
}
/**
* Get AuthorityKeyIdentifier extension
* @return AuthorityKeyIdentifier object or null (if no such object
* in certificate)
*/
public AuthorityKeyIdentifierExtension getAuthorityKeyIdentifierExtension()
{
return (AuthorityKeyIdentifierExtension)
getExtension(PKIXExtensions.AuthorityKey_Id);
}
/**
* Get BasicConstraints extension
* @return BasicConstraints object or null (if no such object in
* certificate)
*/
public BasicConstraintsExtension getBasicConstraintsExtension() {
return (BasicConstraintsExtension)
getExtension(PKIXExtensions.BasicConstraints_Id);
}
/**
* Get CertificatePoliciesExtension
* @return CertificatePoliciesExtension or null (if no such object in
* certificate)
*/
public CertificatePoliciesExtension getCertificatePoliciesExtension() {
return (CertificatePoliciesExtension)
getExtension(PKIXExtensions.CertificatePolicies_Id);
}
/**
* Get ExtendedKeyUsage extension
* @return ExtendedKeyUsage extension object or null (if no such object
* in certificate)
*/
public ExtendedKeyUsageExtension getExtendedKeyUsageExtension() {
return (ExtendedKeyUsageExtension)
getExtension(PKIXExtensions.ExtendedKeyUsage_Id);
}
/**
* Get IssuerAlternativeName extension
* @return IssuerAlternativeName object or null (if no such object in
* certificate)
*/
public IssuerAlternativeNameExtension getIssuerAlternativeNameExtension() {
return (IssuerAlternativeNameExtension)
getExtension(PKIXExtensions.IssuerAlternativeName_Id);
}
/**
* Get NameConstraints extension
* @return NameConstraints object or null (if no such object in certificate)
*/
public NameConstraintsExtension getNameConstraintsExtension() {
return (NameConstraintsExtension)
getExtension(PKIXExtensions.NameConstraints_Id);
}
/**
* Get PolicyConstraints extension
* @return PolicyConstraints object or null (if no such object in
* certificate)
*/
public PolicyConstraintsExtension getPolicyConstraintsExtension() {
return (PolicyConstraintsExtension)
getExtension(PKIXExtensions.PolicyConstraints_Id);
}
/**
* Get PolicyMappingsExtension extension
* @return PolicyMappingsExtension object or null (if no such object
* in certificate)
*/
public PolicyMappingsExtension getPolicyMappingsExtension() {
return (PolicyMappingsExtension)
getExtension(PKIXExtensions.PolicyMappings_Id);
}
/**
* Get PrivateKeyUsage extension
* @return PrivateKeyUsage object or null (if no such object in certificate)
*/
public PrivateKeyUsageExtension getPrivateKeyUsageExtension() {
return (PrivateKeyUsageExtension)
getExtension(PKIXExtensions.PrivateKeyUsage_Id);
}
/**
* Get SubjectAlternativeName extension
* @return SubjectAlternativeName object or null (if no such object in
* certificate)
*/
public SubjectAlternativeNameExtension getSubjectAlternativeNameExtension()
{
return (SubjectAlternativeNameExtension)
getExtension(PKIXExtensions.SubjectAlternativeName_Id);
}
/**
* Get SubjectKeyIdentifier extension
* @return SubjectKeyIdentifier object or null (if no such object in
* certificate)
*/
public SubjectKeyIdentifierExtension getSubjectKeyIdentifierExtension() {
return (SubjectKeyIdentifierExtension)
getExtension(PKIXExtensions.SubjectKey_Id);
}
/**
* Get CRLDistributionPoints extension
* @return CRLDistributionPoints object or null (if no such object in
* certificate)
*/
public CRLDistributionPointsExtension getCRLDistributionPointsExtension() {
return (CRLDistributionPointsExtension)
getExtension(PKIXExtensions.CRLDistributionPoints_Id);
}
/**
* Return true if a critical extension is found that is
* not supported, otherwise return false.
*/
public boolean hasUnsupportedCriticalExtension() {
if (info == null)
return false;
try {
CertificateExtensions exts = (CertificateExtensions)info.get(
CertificateExtensions.NAME);
if (exts == null)
return false;
return exts.hasUnsupportedCriticalExtension();
} catch (Exception e) {
return false;
}
}
/**
* Gets a Set of the extension(s) marked CRITICAL in the
* certificate. In the returned set, each extension is
* represented by its OID string.
*
* @return a set of the extension oid strings in the
* certificate that are marked critical.
*/
public Set<String> getCriticalExtensionOIDs() {
if (info == null) {
return null;
}
try {
CertificateExtensions exts = (CertificateExtensions)info.get(
CertificateExtensions.NAME);
if (exts == null) {
return null;
}
Set<String> extSet = new HashSet<String>();
for (Extension ex : exts.getAllExtensions()) {
if (ex.isCritical()) {
extSet.add(ex.getExtensionId().toString());
}
}
return extSet;
} catch (Exception e) {
return null;
}
}
/**
* Gets a Set of the extension(s) marked NON-CRITICAL in the
* certificate. In the returned set, each extension is
* represented by its OID string.
*
* @return a set of the extension oid strings in the
* certificate that are NOT marked critical.
*/
public Set<String> getNonCriticalExtensionOIDs() {
if (info == null) {
return null;
}
try {
CertificateExtensions exts = (CertificateExtensions)info.get(
CertificateExtensions.NAME);
if (exts == null) {
return null;
}
Set<String> extSet = new HashSet<String>();
for (Extension ex : exts.getAllExtensions()) {
if (!ex.isCritical()) {
extSet.add(ex.getExtensionId().toString());
}
}
extSet.addAll(exts.getUnparseableExtensions().keySet());
return extSet;
} catch (Exception e) {
return null;
}
}
/**
* Gets the extension identified by the given ObjectIdentifier
*
* @param oid the Object Identifier value for the extension.
* @return Extension or null if certificate does not contain this
* extension
*/
public Extension getExtension(ObjectIdentifier oid) {
if (info == null) {
return null;
}
try {
CertificateExtensions extensions;
try {
extensions = (CertificateExtensions)info.get(CertificateExtensions.NAME);
} catch (CertificateException ce) {
return null;
}
if (extensions == null) {
return null;
} else {
for (Extension ex : extensions.getAllExtensions()) {
if (ex.getExtensionId().equals(oid)) {
//XXXX May want to consider cloning this
return ex;
}
}
/* no such extension in this certificate */
return null;
}
} catch (IOException ioe) {
return null;
}
}
public Extension getUnparseableExtension(ObjectIdentifier oid) {
if (info == null) {
return null;
}
try {
CertificateExtensions extensions;
try {
extensions = (CertificateExtensions)info.get(CertificateExtensions.NAME);
} catch (CertificateException ce) {
return null;
}
if (extensions == null) {
return null;
} else {
return extensions.getUnparseableExtensions().get(oid.toString());
}
} catch (IOException ioe) {
return null;
}
}
/**
* Gets the DER encoded extension identified by the given
* oid String.
*
* @param oid the Object Identifier value for the extension.
*/
public byte[] getExtensionValue(String oid) {
try {
ObjectIdentifier findOID = new ObjectIdentifier(oid);
String extAlias = OIDMap.getName(findOID);
Extension certExt = null;
CertificateExtensions exts = (CertificateExtensions)info.get(
CertificateExtensions.NAME);
if (extAlias == null) { // may be unknown
// get the extensions, search thru' for this oid
if (exts == null) {
return null;
}
for (Extension ex : exts.getAllExtensions()) {
ObjectIdentifier inCertOID = ex.getExtensionId();
if (inCertOID.equals(findOID)) {
certExt = ex;
break;
}
}
} else { // there's sub-class that can handle this extension
try {
certExt = (Extension)this.get(extAlias);
} catch (CertificateException e) {
// get() throws an Exception instead of returning null, ignore
}
}
if (certExt == null) {
if (exts != null) {
certExt = exts.getUnparseableExtensions().get(oid);
}
if (certExt == null) {
return null;
}
}
byte[] extData = certExt.getExtensionValue();
if (extData == null) {
return null;
}
DerOutputStream out = new DerOutputStream();
out.putOctetString(extData);
return out.toByteArray();
} catch (Exception e) {
return null;
}
}
/**
* Get a boolean array representing the bits of the KeyUsage extension,
* (oid = 2.5.29.15).
* @return the bit values of this extension as an array of booleans.
*/
public boolean[] getKeyUsage() {
try {
String extAlias = OIDMap.getName(PKIXExtensions.KeyUsage_Id);
if (extAlias == null)
return null;
KeyUsageExtension certExt = (KeyUsageExtension)this.get(extAlias);
if (certExt == null)
return null;
boolean[] ret = certExt.getBits();
if (ret.length < NUM_STANDARD_KEY_USAGE) {
boolean[] usageBits = new boolean[NUM_STANDARD_KEY_USAGE];
System.arraycopy(ret, 0, usageBits, 0, ret.length);
ret = usageBits;
}
return ret;
} catch (Exception e) {
return null;
}
}
/**
* This method are the overridden implementation of
* getExtendedKeyUsage method in X509Certificate in the Sun
* provider. It is better performance-wise since it returns cached
* values.
*/
public synchronized List<String> getExtendedKeyUsage()
throws CertificateParsingException {
if (readOnly && extKeyUsage != null) {
return extKeyUsage;
} else {
ExtendedKeyUsageExtension ext = getExtendedKeyUsageExtension();
if (ext == null) {
return null;
}
extKeyUsage =
Collections.unmodifiableList(ext.getExtendedKeyUsage());
return extKeyUsage;
}
}
/**
* This static method is the default implementation of the
* getExtendedKeyUsage method in X509Certificate. A
* X509Certificate provider generally should overwrite this to
* provide among other things caching for better performance.
*/
public static List<String> getExtendedKeyUsage(X509Certificate cert)
throws CertificateParsingException {
try {
byte[] ext = cert.getExtensionValue(EXTENDED_KEY_USAGE_OID);
if (ext == null)
return null;
DerValue val = new DerValue(ext);
byte[] data = val.getOctetString();
ExtendedKeyUsageExtension ekuExt =
new ExtendedKeyUsageExtension(Boolean.FALSE, data);
return Collections.unmodifiableList(ekuExt.getExtendedKeyUsage());
} catch (IOException ioe) {
CertificateParsingException cpe =
new CertificateParsingException();
cpe.initCause(ioe);
throw cpe;
}
}
/**
* Get the certificate constraints path length from the
* the critical BasicConstraints extension, (oid = 2.5.29.19).
* @return the length of the constraint.
*/
public int getBasicConstraints() {
try {
String extAlias = OIDMap.getName(PKIXExtensions.BasicConstraints_Id);
if (extAlias == null)
return -1;
BasicConstraintsExtension certExt =
(BasicConstraintsExtension)this.get(extAlias);
if (certExt == null)
return -1;
if (((Boolean)certExt.get(BasicConstraintsExtension.IS_CA)
).booleanValue() == true)
return ((Integer)certExt.get(
BasicConstraintsExtension.PATH_LEN)).intValue();
else
return -1;
} catch (Exception e) {
return -1;
}
}
/**
* Converts a GeneralNames structure into an immutable Collection of
* alternative names (subject or issuer) in the form required by
* {@link #getSubjectAlternativeNames} or
* {@link #getIssuerAlternativeNames}.
*
* @param names the GeneralNames to be converted
* @return an immutable Collection of alternative names
*/
private static Collection<List<?>> makeAltNames(GeneralNames names) {
if (names.isEmpty()) {
return Collections.<List<?>>emptySet();
}
Set<List<?>> newNames = new HashSet<List<?>>();
for (GeneralName gname : names.names()) {
GeneralNameInterface name = gname.getName();
List<Object> nameEntry = new ArrayList<Object>(2);
nameEntry.add(Integer.valueOf(name.getType()));
switch (name.getType()) {
case GeneralNameInterface.NAME_RFC822:
nameEntry.add(((RFC822Name) name).getName());
break;
case GeneralNameInterface.NAME_DNS:
nameEntry.add(((DNSName) name).getName());
break;
case GeneralNameInterface.NAME_DIRECTORY:
nameEntry.add(((X500Name) name).getRFC2253Name());
break;
case GeneralNameInterface.NAME_URI:
nameEntry.add(((URIName) name).getName());
break;
case GeneralNameInterface.NAME_IP:
try {
nameEntry.add(((IPAddressName) name).getName());
} catch (IOException ioe) {
// IPAddressName in cert is bogus
throw new RuntimeException("IPAddress cannot be parsed",
ioe);
}
break;
case GeneralNameInterface.NAME_OID:
nameEntry.add(((OIDName) name).getOID().toString());
break;
default:
// add DER encoded form
DerOutputStream derOut = new DerOutputStream();
try {
name.encode(derOut);
} catch (IOException ioe) {
// should not occur since name has already been decoded
// from cert (this would indicate a bug in our code)
throw new RuntimeException("name cannot be encoded", ioe);
}
nameEntry.add(derOut.toByteArray());
break;
}
newNames.add(Collections.unmodifiableList(nameEntry));
}
return Collections.unmodifiableCollection(newNames);
}
/**
* Checks a Collection of altNames and clones any name entries of type
* byte [].
*/ // only partially generified due to javac bug
private static Collection<List<?>> cloneAltNames(Collection<List<?>> altNames) {
boolean mustClone = false;
for (List<?> nameEntry : altNames) {
if (nameEntry.get(1) instanceof byte[]) {
// must clone names
mustClone = true;
}
}
if (mustClone) {
Set<List<?>> namesCopy = new HashSet<List<?>>();
for (List<?> nameEntry : altNames) {
Object nameObject = nameEntry.get(1);
if (nameObject instanceof byte[]) {
List<Object> nameEntryCopy =
new ArrayList<Object>(nameEntry);
nameEntryCopy.set(1, ((byte[])nameObject).clone());
namesCopy.add(Collections.unmodifiableList(nameEntryCopy));
} else {
namesCopy.add(nameEntry);
}
}
return Collections.unmodifiableCollection(namesCopy);
} else {
return altNames;
}
}
/**
* This method are the overridden implementation of
* getSubjectAlternativeNames method in X509Certificate in the Sun
* provider. It is better performance-wise since it returns cached
* values.
*/
public synchronized Collection<List<?>> getSubjectAlternativeNames()
throws CertificateParsingException {
// return cached value if we can
if (readOnly && subjectAlternativeNames != null) {
return cloneAltNames(subjectAlternativeNames);
}
SubjectAlternativeNameExtension subjectAltNameExt =
getSubjectAlternativeNameExtension();
if (subjectAltNameExt == null) {
return null;
}
GeneralNames names;
try {
names = (GeneralNames) subjectAltNameExt.get
(SubjectAlternativeNameExtension.SUBJECT_NAME);
} catch (IOException ioe) {
// should not occur
return Collections.<List<?>>emptySet();
}
subjectAlternativeNames = makeAltNames(names);
return subjectAlternativeNames;
}
/**
* This static method is the default implementation of the
* getSubjectAlternaitveNames method in X509Certificate. A
* X509Certificate provider generally should overwrite this to
* provide among other things caching for better performance.
*/
public static Collection<List<?>> getSubjectAlternativeNames(X509Certificate cert)
throws CertificateParsingException {
try {
byte[] ext = cert.getExtensionValue(SUBJECT_ALT_NAME_OID);
if (ext == null) {
return null;
}
DerValue val = new DerValue(ext);
byte[] data = val.getOctetString();
SubjectAlternativeNameExtension subjectAltNameExt =
new SubjectAlternativeNameExtension(Boolean.FALSE,
data);
GeneralNames names;
try {
names = (GeneralNames) subjectAltNameExt.get
(SubjectAlternativeNameExtension.SUBJECT_NAME);
} catch (IOException ioe) {
// should not occur
return Collections.<List<?>>emptySet();
}
return makeAltNames(names);
} catch (IOException ioe) {
CertificateParsingException cpe =
new CertificateParsingException();
cpe.initCause(ioe);
throw cpe;
}
}
/**
* This method are the overridden implementation of
* getIssuerAlternativeNames method in X509Certificate in the Sun
* provider. It is better performance-wise since it returns cached
* values.
*/
public synchronized Collection<List<?>> getIssuerAlternativeNames()
throws CertificateParsingException {
// return cached value if we can
if (readOnly && issuerAlternativeNames != null) {
return cloneAltNames(issuerAlternativeNames);
}
IssuerAlternativeNameExtension issuerAltNameExt =
getIssuerAlternativeNameExtension();
if (issuerAltNameExt == null) {
return null;
}
GeneralNames names;
try {
names = (GeneralNames) issuerAltNameExt.get
(IssuerAlternativeNameExtension.ISSUER_NAME);
} catch (IOException ioe) {
// should not occur
return Collections.<List<?>>emptySet();
}
issuerAlternativeNames = makeAltNames(names);
return issuerAlternativeNames;
}
/**
* This static method is the default implementation of the
* getIssuerAlternaitveNames method in X509Certificate. A
* X509Certificate provider generally should overwrite this to
* provide among other things caching for better performance.
*/
public static Collection<List<?>> getIssuerAlternativeNames(X509Certificate cert)
throws CertificateParsingException {
try {
byte[] ext = cert.getExtensionValue(ISSUER_ALT_NAME_OID);
if (ext == null) {
return null;
}
DerValue val = new DerValue(ext);
byte[] data = val.getOctetString();
IssuerAlternativeNameExtension issuerAltNameExt =
new IssuerAlternativeNameExtension(Boolean.FALSE,
data);
GeneralNames names;
try {
names = (GeneralNames) issuerAltNameExt.get
(IssuerAlternativeNameExtension.ISSUER_NAME);
} catch (IOException ioe) {
// should not occur
return Collections.<List<?>>emptySet();
}
return makeAltNames(names);
} catch (IOException ioe) {
CertificateParsingException cpe =
new CertificateParsingException();
cpe.initCause(ioe);
throw cpe;
}
}
public AuthorityInfoAccessExtension getAuthorityInfoAccessExtension() {
return (AuthorityInfoAccessExtension)
getExtension(PKIXExtensions.AuthInfoAccess_Id);
}
/************************************************************/
/*
* Cert is a SIGNED ASN.1 macro, a three elment sequence:
*
* - Data to be signed (ToBeSigned) -- the "raw" cert
* - Signature algorithm (SigAlgId)
* - The signature bits
*
* This routine unmarshals the certificate, saving the signature
* parts away for later verification.
*/
private void parse(DerValue val)
throws CertificateException, IOException {
// check if can over write the certificate
if (readOnly)
throw new CertificateParsingException(
"cannot over-write existing certificate");
if (val.data == null || val.tag != DerValue.tag_Sequence)
throw new CertificateParsingException(
"invalid DER-encoded certificate data");
signedCert = val.toByteArray();
DerValue[] seq = new DerValue[3];
seq[0] = val.data.getDerValue();
seq[1] = val.data.getDerValue();
seq[2] = val.data.getDerValue();
if (val.data.available() != 0) {
throw new CertificateParsingException("signed overrun, bytes = "
+ val.data.available());
}
if (seq[0].tag != DerValue.tag_Sequence) {
throw new CertificateParsingException("signed fields invalid");
}
algId = AlgorithmId.parse(seq[1]);
signature = seq[2].getBitString();
if (seq[1].data.available() != 0) {
throw new CertificateParsingException("algid field overrun");
}
if (seq[2].data.available() != 0)
throw new CertificateParsingException("signed fields overrun");
// The CertificateInfo
info = new X509CertInfo(seq[0]);
// the "inner" and "outer" signature algorithms must match
AlgorithmId infoSigAlg = (AlgorithmId)info.get(
CertificateAlgorithmId.NAME
+ DOT +
CertificateAlgorithmId.ALGORITHM);
if (! algId.equals(infoSigAlg))
throw new CertificateException("Signature algorithm mismatch");
readOnly = true;
}
/**
* Extract the subject or issuer X500Principal from an X509Certificate.
* Parses the encoded form of the cert to preserve the principal's
* ASN.1 encoding.
*/
private static X500Principal getX500Principal(X509Certificate cert,
boolean getIssuer) throws Exception {
byte[] encoded = cert.getEncoded();
DerInputStream derIn = new DerInputStream(encoded);
DerValue tbsCert = derIn.getSequence(3)[0];
DerInputStream tbsIn = tbsCert.data;
DerValue tmp;
tmp = tbsIn.getDerValue();
// skip version number if present
if (tmp.isContextSpecific((byte)0)) {
tmp = tbsIn.getDerValue();
}
// tmp always contains serial number now
tmp = tbsIn.getDerValue(); // skip signature
tmp = tbsIn.getDerValue(); // issuer
if (getIssuer == false) {
tmp = tbsIn.getDerValue(); // skip validity
tmp = tbsIn.getDerValue(); // subject
}
byte[] principalBytes = tmp.toByteArray();
return new X500Principal(principalBytes);
}
/**
* Extract the subject X500Principal from an X509Certificate.
* Called from java.security.cert.X509Certificate.getSubjectX500Principal().
*/
public static X500Principal getSubjectX500Principal(X509Certificate cert) {
try {
return getX500Principal(cert, false);
} catch (Exception e) {
throw new RuntimeException("Could not parse subject", e);
}
}
/**
* Extract the issuer X500Principal from an X509Certificate.
* Called from java.security.cert.X509Certificate.getIssuerX500Principal().
*/
public static X500Principal getIssuerX500Principal(X509Certificate cert) {
try {
return getX500Principal(cert, true);
} catch (Exception e) {
throw new RuntimeException("Could not parse issuer", e);
}
}
/**
* Returned the encoding of the given certificate for internal use.
* Callers must guarantee that they neither modify it nor expose it
* to untrusted code. Uses getEncodedInternal() if the certificate
* is instance of X509CertImpl, getEncoded() otherwise.
*/
public static byte[] getEncodedInternal(Certificate cert)
throws CertificateEncodingException {
if (cert instanceof X509CertImpl) {
return ((X509CertImpl)cert).getEncodedInternal();
} else {
return cert.getEncoded();
}
}
/**
* Utility method to convert an arbitrary instance of X509Certificate
* to a X509CertImpl. Does a cast if possible, otherwise reparses
* the encoding.
*/
public static X509CertImpl toImpl(X509Certificate cert)
throws CertificateException {
if (cert instanceof X509CertImpl) {
return (X509CertImpl)cert;
} else {
return X509Factory.intern(cert);
}
}
/**
* Utility method to test if a certificate is self-issued. This is
* the case iff the subject and issuer X500Principals are equal.
*/
public static boolean isSelfIssued(X509Certificate cert) {
X500Principal subject = cert.getSubjectX500Principal();
X500Principal issuer = cert.getIssuerX500Principal();
return subject.equals(issuer);
}
/**
* Utility method to test if a certificate is self-signed. This is
* the case iff the subject and issuer X500Principals are equal
* AND the certificate's subject public key can be used to verify
* the certificate. In case of exception, returns false.
*/
public static boolean isSelfSigned(X509Certificate cert,
String sigProvider) {
if (isSelfIssued(cert)) {
try {
if (sigProvider == null) {
cert.verify(cert.getPublicKey());
} else {
cert.verify(cert.getPublicKey(), sigProvider);
}
return true;
} catch (Exception e) {
// In case of exception, return false
}
}
return false;
}
}