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The Apache WSS4J project provides a Java implementation of the primary security standards
for Web Services, namely the OASIS Web Services Security (WS-Security) specifications
from the OASIS Web Services Security TC.
/**
* 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.
*/
package org.apache.ws.security.components.crypto;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ws.security.WSSecurityException;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.math.BigInteger;
import java.security.Key;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.CertPath;
import java.security.cert.Certificate;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.security.interfaces.RSAPublicKey;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import javax.security.auth.x500.X500Principal;
/**
* Created by IntelliJ IDEA.
* User: dims
* Date: Sep 15, 2005
* Time: 9:50:40 AM
* To change this template use File | Settings | File Templates.
*/
public abstract class CryptoBase implements Crypto {
private static Log log = LogFactory.getLog(CryptoBase.class);
private static final Constructor BC_509CLASS_CONS;
protected static Map certFactMap = new HashMap();
protected KeyStore keystore = null;
static String SKI_OID = "2.5.29.14";
protected KeyStore cacerts = null;
static {
Constructor cons = null;
try {
Class c = Class.forName("org.bouncycastle.asn1.x509.X509Name");
cons = c.getConstructor(new Class[] {String.class});
} catch (Exception e) {
//ignore
}
BC_509CLASS_CONS = cons;
}
/**
* Constructor
*/
protected CryptoBase() {
}
/**
* @return a crypto provider name. This operation should
* return null if the default crypto provider should
* be used.
*/
protected abstract String getCryptoProvider();
private String mapKeystoreProviderToCertProvider(String s) {
if ("SunJSSE".equals(s)) {
return "SUN";
}
return s;
}
/**
* Singleton certificate factory for this Crypto instance.
*
*
* @return Returns a CertificateFactory to construct
* X509 certificates
* @throws org.apache.ws.security.WSSecurityException
*
*/
public synchronized CertificateFactory getCertificateFactory() throws WSSecurityException {
String provider = getCryptoProvider();
String keyStoreProvider = keystore == null ? null : keystore.getProvider().getName();
//Try to find a CertificateFactory that generates certs that are fully
//compatible with the certs in the KeyStore (Sun -> Sun, BC -> BC, etc...)
CertificateFactory factory = null;
if (provider != null) {
factory = (CertificateFactory)certFactMap.get(provider);
} else if (keyStoreProvider != null) {
factory =
(CertificateFactory)certFactMap.get(
mapKeystoreProviderToCertProvider(keyStoreProvider)
);
if (factory == null) {
factory = (CertificateFactory)certFactMap.get(keyStoreProvider);
}
} else {
factory = (CertificateFactory)certFactMap.get("DEFAULT");
}
if (factory == null) {
try {
if (provider == null || provider.length() == 0) {
if (keyStoreProvider != null && keyStoreProvider.length() != 0) {
try {
factory =
CertificateFactory.getInstance(
"X.509",
mapKeystoreProviderToCertProvider(keyStoreProvider)
);
certFactMap.put(keyStoreProvider, factory);
certFactMap.put(
mapKeystoreProviderToCertProvider(keyStoreProvider), factory
);
} catch (Exception ex) {
log.debug(ex);
//Ignore, we'll just use the default since they didn't specify one.
//Hopefully that will work for them.
}
}
if (factory == null) {
factory = CertificateFactory.getInstance("X.509");
certFactMap.put("DEFAULT", factory);
}
} else {
factory = CertificateFactory.getInstance("X.509", provider);
certFactMap.put(provider, factory);
}
certFactMap.put(factory.getProvider().getName(), factory);
} catch (CertificateException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "unsupportedCertType",
null, e
);
} catch (NoSuchProviderException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "noSecProvider",
null, e
);
}
}
return factory;
}
/**
* load a X509Certificate from the input stream.
*
*
* @param in The InputStream array containing the X509 data
* @return Returns a X509 certificate
* @throws org.apache.ws.security.WSSecurityException
*
*/
public X509Certificate loadCertificate(InputStream in) throws WSSecurityException {
X509Certificate cert = null;
try {
cert = (X509Certificate) getCertificateFactory().generateCertificate(in);
} catch (CertificateException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "parseError",
null, e
);
}
return cert;
}
/**
* Gets the private key identified by alias and password.
*
*
* @param alias The alias (KeyStore) of the key owner
* @param password The password needed to access the private key
* @return The private key
* @throws Exception
*/
public PrivateKey getPrivateKey(String alias, String password) throws Exception {
if (alias == null) {
throw new Exception("alias is null");
}
boolean b = keystore.isKeyEntry(alias);
if (!b) {
String msg = "Cannot find key for alias: [" + alias + "]";
String logMsg = createKeyStoreErrorMessage(keystore);
log.error(msg + logMsg);
throw new Exception(msg);
}
Key keyTmp = keystore.getKey(alias, password == null ? new char[]{} : password.toCharArray());
if (!(keyTmp instanceof PrivateKey)) {
String msg = "Key is not a private key, alias: [" + alias + "]";
String logMsg = createKeyStoreErrorMessage(keystore);
log.error(msg + logMsg);
throw new Exception(msg);
}
return (PrivateKey) keyTmp;
}
protected static String createKeyStoreErrorMessage(KeyStore keystore) throws KeyStoreException {
Enumeration aliases = keystore.aliases();
StringBuffer sb = new StringBuffer(keystore.size() * 7);
boolean firstAlias = true;
while (aliases.hasMoreElements()) {
if (!firstAlias) {
sb.append(", ");
}
sb.append(aliases.nextElement());
firstAlias = false;
}
String msg = " in keystore of type [" + keystore.getType()
+ "] from provider [" + keystore.getProvider()
+ "] with size [" + keystore.size() + "] and aliases: {"
+ sb.toString() + "}";
return msg;
}
protected Vector splitAndTrim(String inString) {
X509NameTokenizer nmTokens = new X509NameTokenizer(inString);
Vector vr = new Vector();
while (nmTokens.hasMoreTokens()) {
vr.add(nmTokens.nextToken());
}
java.util.Collections.sort(vr);
return vr;
}
/**
* Lookup a X509 Certificate in the keystore according to a given
* the issuer of a Certificate.
*
* The search gets all alias names of the keystore and gets the certificate chain
* for each alias. Then the Issuer for each certificate of the chain
* is compared with the parameters.
*
* @param issuer The issuer's name for the certificate
* @return alias name of the certificate that matches the issuer name
* or null if no such certificate was found.
*/
public String getAliasForX509Cert(String issuer) throws WSSecurityException {
return getAliasForX509Cert(issuer, null, false);
}
private Object createBCX509Name(String s) {
if (BC_509CLASS_CONS != null) {
try {
return BC_509CLASS_CONS.newInstance(new Object[] {s});
} catch (Exception e) {
//ignore
}
}
return new X500Principal(s);
}
/**
* Lookup a X509 Certificate in the keystore according to a given serial number and
* the issuer of a Certificate.
*
* The search gets all alias names of the keystore and gets the certificate chain
* for each alias. Then the SerialNumber and Issuer for each certificate of the chain
* is compared with the parameters.
*
* @param issuer The issuer's name for the certificate
* @param serialNumber The serial number of the certificate from the named issuer
* @return alias name of the certificate that matches serialNumber and issuer name
* or null if no such certificate was found.
*/
public String getAliasForX509Cert(String issuer, BigInteger serialNumber)
throws WSSecurityException {
return getAliasForX509Cert(issuer, serialNumber, true);
}
/*
* need to check if "getCertificateChain" also finds certificates that are
* used for encryption only, i.e. they may not be signed by a CA
* Otherwise we must define a restriction how to use certificate:
* each certificate must be signed by a CA or is a self signed Certificate
* (this should work as well).
* --- remains to be tested in several ways --
*/
private String getAliasForX509Cert(
String issuer,
BigInteger serialNumber,
boolean useSerialNumber
) throws WSSecurityException {
Object issuerName = null;
Certificate cert = null;
if (keystore == null) {
return null;
}
//
// Convert the issuer DN to a java X500Principal object first. This is to ensure
// interop with a DN constructed from .NET, where e.g. it uses "S" instead of "ST".
// Then convert it to a BouncyCastle X509Name, which will order the attributes of
// the DN in a particular way (see WSS-168). If the conversion to an X500Principal
// object fails (e.g. if the DN contains "E" instead of "EMAILADDRESS"), then fall
// back on a direct conversion to a BC X509Name
//
try {
X500Principal issuerRDN = new X500Principal(issuer);
issuerName = createBCX509Name(issuerRDN.getName());
} catch (java.lang.IllegalArgumentException ex) {
issuerName = createBCX509Name(issuer);
}
try {
for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
String alias = (String) e.nextElement();
Certificate[] certs = keystore.getCertificateChain(alias);
if (certs == null || certs.length == 0) {
// no cert chain, so lets check if getCertificate gives us a result.
cert = keystore.getCertificate(alias);
if (cert == null) {
continue;
}
} else {
cert = certs[0];
}
if (!(cert instanceof X509Certificate)) {
continue;
}
X509Certificate x509cert = (X509Certificate) cert;
if (!useSerialNumber || x509cert.getSerialNumber().compareTo(serialNumber) == 0) {
Object certName = createBCX509Name(x509cert.getIssuerX500Principal().getName());
if (certName.equals(issuerName)) {
return alias;
}
}
}
} catch (KeyStoreException e) {
throw new WSSecurityException(WSSecurityException.FAILURE, "keystore", null, e);
}
return null;
}
/**
* Lookup a X509 Certificate in the keystore according to a given
* SubjectKeyIdentifier.
*
* The search gets all alias names of the keystore and gets the certificate chain
* or certificate for each alias. Then the SKI for each user certificate
* is compared with the SKI parameter.
*
* @param skiBytes The SKI info bytes
* @return alias name of the certificate that matches serialNumber and issuer name
* or null if no such certificate was found.
* @throws org.apache.ws.security.WSSecurityException
* if problems during keystore handling or wrong certificate (no SKI data)
*/
public String getAliasForX509Cert(byte[] skiBytes) throws WSSecurityException {
Certificate cert = null;
if (keystore == null) {
return null;
}
try {
for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
String alias = (String) e.nextElement();
Certificate[] certs = keystore.getCertificateChain(alias);
if (certs == null || certs.length == 0) {
// no cert chain, so lets check if getCertificate gives us a result.
cert = keystore.getCertificate(alias);
if (cert == null) {
continue;
}
} else {
cert = certs[0];
}
if (!(cert instanceof X509Certificate)) {
continue;
}
byte[] data = getSKIBytesFromCert((X509Certificate) cert);
if (data.length != skiBytes.length) {
continue;
}
if (Arrays.equals(data, skiBytes)) {
return alias;
}
}
} catch (KeyStoreException e) {
throw new WSSecurityException(WSSecurityException.FAILURE, "keystore", null, e);
}
return null;
}
/**
* Return a X509 Certificate alias in the keystore according to a given Certificate
*
*
* @param cert The certificate to lookup
* @return alias name of the certificate that matches the given certificate
* or null if no such certificate was found.
*/
public String getAliasForX509Cert(Certificate cert) throws WSSecurityException {
try {
if (keystore == null) {
return null;
}
//
// The following code produces the wrong alias in BouncyCastle and so
// we'll just use the brute-force search
//
// String alias = keystore.getCertificateAlias(cert);
// if (alias != null) {
// return alias;
// }
Enumeration e = keystore.aliases();
while (e.hasMoreElements()) {
String alias = (String) e.nextElement();
Certificate retrievedCert = keystore.getCertificate(alias);
if (retrievedCert != null && retrievedCert.equals(cert)) {
return alias;
}
}
} catch (KeyStoreException e) {
throw new WSSecurityException(WSSecurityException.FAILURE, "keystore", null, e);
}
return null;
}
/**
* Gets the list of certificates for a given alias.
*
*
* @param alias Lookup certificate chain for this alias
* @return Array of X509 certificates for this alias name, or
* null if this alias does not exist in the keystore
*/
public X509Certificate[] getCertificates(String alias) throws WSSecurityException {
Certificate[] certs = null;
Certificate cert = null;
try {
if (this.keystore != null) {
//There's a chance that there can only be a set of trust stores
certs = keystore.getCertificateChain(alias);
if (certs == null || certs.length == 0) {
// no cert chain, so lets check if getCertificate gives us a
// result.
cert = keystore.getCertificate(alias);
}
}
if (certs == null && cert == null && cacerts != null) {
// Now look into the trust stores
certs = cacerts.getCertificateChain(alias);
if (certs == null) {
cert = cacerts.getCertificate(alias);
}
}
if (cert != null) {
certs = new Certificate[]{cert};
} else if (certs == null) {
// At this point we don't have certs or a cert
return null;
}
} catch (KeyStoreException e) {
throw new WSSecurityException(WSSecurityException.FAILURE, "keystore", null, e);
}
X509Certificate[] x509certs = new X509Certificate[certs.length];
for (int i = 0; i < certs.length; i++) {
x509certs[i] = (X509Certificate) certs[i];
}
return x509certs;
}
/**
* Lookup a X509 Certificate in the keystore according to a given
* Thumbprint.
*
* The search gets all alias names of the keystore, then reads the certificate chain
* or certificate for each alias. Then the thumbprint for each user certificate
* is compared with the thumbprint parameter.
*
* @param thumb The SHA1 thumbprint info bytes
* @return alias name of the certificate that matches the thumbprint
* or null if no such certificate was found.
* @throws org.apache.ws.security.WSSecurityException
* if problems during keystore handling or wrong certificate
*/
public String getAliasForX509CertThumb(byte[] thumb) throws WSSecurityException {
Certificate cert = null;
MessageDigest sha = null;
if (keystore == null) {
return null;
}
try {
sha = MessageDigest.getInstance("SHA-1");
sha.reset();
} catch (NoSuchAlgorithmException e) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "noSHA1availabe", null, e
);
}
try {
for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
String alias = (String) e.nextElement();
Certificate[] certs = keystore.getCertificateChain(alias);
if (certs == null || certs.length == 0) {
// no cert chain, so lets check if getCertificate gives us a result.
cert = keystore.getCertificate(alias);
if (cert == null) {
continue;
}
} else {
cert = certs[0];
}
if (!(cert instanceof X509Certificate)) {
continue;
}
try {
sha.update(cert.getEncoded());
} catch (CertificateEncodingException ex) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "encodeError",
null, ex
);
}
byte[] data = sha.digest();
if (Arrays.equals(data, thumb)) {
return alias;
}
}
} catch (KeyStoreException e) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "keystore", null, e
);
}
return null;
}
/**
* A Hook for subclasses to set the keystore without having to
* load it from an InputStream.
*
* @param ks existing keystore
*/
public void setKeyStore(KeyStore ks) {
keystore = ks;
}
/**
* Reads the SubjectKeyIdentifier information from the certificate.
*
* If the the certificate does not contain a SKI extension then
* try to compute the SKI according to RFC3280 using the
* SHA-1 hash value of the public key. The second method described
* in RFC3280 is not support. Also only RSA public keys are supported.
* If we cannot compute the SKI throw a WSSecurityException.
*
* @param cert The certificate to read SKI
* @return The byte array containing the binary SKI data
*/
public byte[] getSKIBytesFromCert(X509Certificate cert) throws WSSecurityException {
//
// Gets the DER-encoded OCTET string for the extension value (extnValue)
// identified by the passed-in oid String. The oid string is represented
// by a set of positive whole numbers separated by periods.
//
byte[] derEncodedValue = cert.getExtensionValue(SKI_OID);
if (cert.getVersion() < 3 || derEncodedValue == null) {
PublicKey key = cert.getPublicKey();
if (!(key instanceof RSAPublicKey)) {
throw new WSSecurityException(
1,
"noSKIHandling",
new Object[]{"Support for RSA key only"});
}
byte[] encoded = key.getEncoded();
// remove 22-byte algorithm ID and header
byte[] value = new byte[encoded.length - 22];
System.arraycopy(encoded, 22, value, 0, value.length);
MessageDigest sha;
try {
sha = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException ex) {
throw new WSSecurityException(
WSSecurityException.UNSUPPORTED_SECURITY_TOKEN, "noSKIHandling",
new Object[]{"Wrong certificate version (<3) and no SHA1 message digest availabe"},
ex
);
}
sha.reset();
sha.update(value);
return sha.digest();
}
//
// Strip away first four bytes from the DerValue (tag and length of
// ExtensionValue OCTET STRING and KeyIdentifier OCTET STRING)
//
byte abyte0[] = new byte[derEncodedValue.length - 4];
System.arraycopy(derEncodedValue, 4, abyte0, 0, abyte0.length);
return abyte0;
}
public KeyStore getKeyStore() {
return this.keystore;
}
/**
* Lookup X509 Certificates in the keystore according to a given DN of the subject of the certificate
*
* The search gets all alias names of the keystore and gets the certificate (chain)
* for each alias. Then the DN of the certificate is compared with the parameters.
*
* @param subjectDN The DN of subject to look for in the keystore
* @return Vector with all alias of certificates with the same DN as given in the parameters
* @throws org.apache.ws.security.WSSecurityException
*
*/
public String[] getAliasesForDN(String subjectDN) throws WSSecurityException {
//
// Convert the subject DN to a java X500Principal object first. This is to ensure
// interop with a DN constructed from .NET, where e.g. it uses "S" instead of "ST".
// Then convert it to a BouncyCastle X509Name, which will order the attributes of
// the DN in a particular way (see WSS-168). If the conversion to an X500Principal
// object fails (e.g. if the DN contains "E" instead of "EMAILADDRESS"), then fall
// back on a direct conversion to a BC X509Name
//
Object subject;
try {
X500Principal subjectRDN = new X500Principal(subjectDN);
subject = createBCX509Name(subjectRDN.getName());
} catch (java.lang.IllegalArgumentException ex) {
subject = createBCX509Name(subjectDN);
}
Vector aliases = getAlias(subject, keystore);
//If we can't find the issuer in the keystore then look at cacerts
if (aliases.size() == 0 && cacerts != null) {
aliases = getAlias(subject, cacerts);
}
// Convert the vector into an array
String[] result = new String[aliases.size()];
for (int i = 0; i < aliases.size(); i++) {
result[i] = (String) aliases.elementAt(i);
}
return result;
}
/**
* get a byte array given an array of X509 certificates.
*
*
* @param reverse If set the first certificate in the array data will
* the last in the byte array
* @param certs The certificates to convert
* @return The byte array for the certificates ordered according
* to the reverse flag
* @throws WSSecurityException
*/
public byte[] getCertificateData(boolean reverse, X509Certificate[] certs)
throws WSSecurityException {
Vector list = new Vector();
for (int i = 0; i < certs.length; i++) {
if (reverse) {
list.insertElementAt(certs[i], 0);
} else {
list.add(certs[i]);
}
}
try {
CertPath path = getCertificateFactory().generateCertPath(list);
return path.getEncoded();
} catch (CertificateEncodingException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "encodeError",
null, e
);
} catch (CertificateException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "parseError",
null, e
);
}
}
/**
* Construct an array of X509Certificate's from the byte array.
*
*
* @param data The byte array containing the X509 data
* @param reverse If set the first certificate in input data will
* the last in the array
* @return An array of X509 certificates, ordered according to
* the reverse flag
* @throws WSSecurityException
*/
public X509Certificate[] getX509Certificates(byte[] data, boolean reverse)
throws WSSecurityException {
InputStream in = new ByteArrayInputStream(data);
CertPath path = null;
try {
path = getCertificateFactory().generateCertPath(in);
} catch (CertificateException e) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "parseError",
null, e
);
}
List l = path.getCertificates();
X509Certificate[] certs = new X509Certificate[l.size()];
Iterator iterator = l.iterator();
for (int i = 0; i < l.size(); i++) {
certs[(reverse) ? (l.size() - 1 - i) : i] = (X509Certificate) iterator.next();
}
return certs;
}
/**
* Overridden because there's a bug in the base class where they don't use
* the provider variant for the certificate validator.
*
* @param certs
* Certificate chain to validate
* @return true if the certificate chain is valid, false otherwise
* @throws WSSecurityException
*/
public boolean
validateCertPath(
java.security.cert.X509Certificate[] certs
) throws org.apache.ws.security.WSSecurityException {
try {
// Generate cert path
java.util.List cert_list = java.util.Arrays.asList(certs);
java.security.cert.CertPath path =
getCertificateFactory().generateCertPath(cert_list);
// Use the certificates in the keystore as TrustAnchors
java.security.cert.PKIXParameters param =
new java.security.cert.PKIXParameters(this.keystore);
// Do not check a revocation list
param.setRevocationEnabled(false);
// Verify the trust path using the above settings
String provider = getCryptoProvider();
java.security.cert.CertPathValidator validator = null;
if (provider == null || provider.length() == 0) {
validator =
java.security.cert.CertPathValidator.getInstance("PKIX");
} else {
validator =
java.security.cert.CertPathValidator.getInstance(
"PKIX",
provider
);
}
validator.validate(path, param);
} catch (java.security.NoSuchProviderException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath",
new Object[] { e.getMessage() },
e
);
} catch (java.security.NoSuchAlgorithmException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath", new Object[] { e.getMessage() },
e
);
} catch (java.security.cert.CertificateException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath", new Object[] { e.getMessage() },
e
);
} catch (java.security.InvalidAlgorithmParameterException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath",
new Object[] { e.getMessage() },
e
);
} catch (java.security.cert.CertPathValidatorException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath",
new Object[] { e.getMessage() },
e
);
} catch (java.security.KeyStoreException e) {
throw new org.apache.ws.security.WSSecurityException(
org.apache.ws.security.WSSecurityException.FAILURE,
"certpath",
new Object[] { e.getMessage() },
e
);
}
return true;
}
/**
* The subjectRDN argument is either an X500Principal or a BouncyCastle X509Name instance.
*/
private Vector getAlias(Object subjectRDN, KeyStore store) throws WSSecurityException {
// Store the aliases found
Vector aliases = new Vector();
Certificate cert = null;
try {
for (Enumeration e = store.aliases(); e.hasMoreElements();) {
String alias = (String) e.nextElement();
Certificate[] certs = store.getCertificateChain(alias);
if (certs == null || certs.length == 0) {
// no cert chain, so lets check if getCertificate gives us a result.
cert = store.getCertificate(alias);
if (cert == null) {
continue;
}
certs = new Certificate[]{cert};
} else {
cert = certs[0];
}
if (cert instanceof X509Certificate) {
X500Principal foundRDN = ((X509Certificate) cert).getSubjectX500Principal();
Object certName = createBCX509Name(foundRDN.getName());
if (subjectRDN.equals(certName)) {
aliases.add(alias);
}
}
}
} catch (KeyStoreException e) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "keystore", null, e
);
}
return aliases;
}
}