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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* 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).
*
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package sun.security.ssl;
import java.util.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;
import com.sun.net.ssl.internal.ssl.X509ExtendedTrustManager;
import sun.security.validator.*;
import sun.security.util.HostnameChecker;
/**
* This class implements the SunJSSE X.509 trust manager using the internal
* validator API in J2SE core. The logic in this class is minimal.<p>
*
* This class supports both the Simple validation algorithm from previous
* JSSE versions and PKIX validation. Currently, it is not possible for the
* application to specify PKIX parameters other than trust anchors. This will
* be fixed in a future release using new APIs. When that happens, it may also
* make sense to separate the Simple and PKIX trust managers into separate
* classes.
*
* @author Andreas Sterbenz
* @author Xuelei Fan
*/
final class X509TrustManagerImpl extends X509ExtendedTrustManager
implements X509TrustManager {
/**
* Flag indicating whether to enable revocation check for the PKIX trust
* manager. Typically, this will only work if the PKIX implementation
* supports CRL distribution points as we do not manually setup CertStores.
*/
private final static boolean checkRevocation =
Debug.getBooleanProperty("com.sun.net.ssl.checkRevocation", false);
private final String validatorType;
/**
* The Set of trusted X509Certificates.
*/
private final Collection<X509Certificate> trustedCerts;
private final PKIXBuilderParameters pkixParams;
// note that we need separate validator for client and server due to
// the different extension checks. They are initialized lazily on demand.
private volatile Validator clientValidator, serverValidator;
private static final Debug debug = Debug.getInstance("ssl");
X509TrustManagerImpl(String validatorType, KeyStore ks)
throws KeyStoreException {
this.validatorType = validatorType;
this.pkixParams = null;
if (ks == null) {
trustedCerts = Collections.<X509Certificate>emptySet();
} else {
trustedCerts = KeyStores.getTrustedCerts(ks);
}
showTrustedCerts();
}
X509TrustManagerImpl(String validatorType, PKIXBuilderParameters params) {
this.validatorType = validatorType;
this.pkixParams = params;
// create server validator eagerly so that we can conveniently
// get the trusted certificates
// clients need it anyway eventually, and servers will not mind
// the little extra footprint
Validator v = getValidator(Validator.VAR_TLS_SERVER);
trustedCerts = v.getTrustedCertificates();
serverValidator = v;
showTrustedCerts();
}
private void showTrustedCerts() {
if (debug != null && Debug.isOn("trustmanager")) {
for (X509Certificate cert : trustedCerts) {
System.out.println("adding as trusted cert:");
System.out.println(" Subject: "
+ cert.getSubjectX500Principal());
System.out.println(" Issuer: "
+ cert.getIssuerX500Principal());
System.out.println(" Algorithm: "
+ cert.getPublicKey().getAlgorithm()
+ "; Serial number: 0x"
+ cert.getSerialNumber().toString(16));
System.out.println(" Valid from "
+ cert.getNotBefore() + " until "
+ cert.getNotAfter());
System.out.println();
}
}
}
private Validator getValidator(String variant) {
Validator v;
if (pkixParams == null) {
v = Validator.getInstance(validatorType, variant, trustedCerts);
// if the PKIX validator is created from a KeyStore,
// disable revocation checking
if (v instanceof PKIXValidator) {
PKIXValidator pkixValidator = (PKIXValidator)v;
pkixValidator.getParameters().setRevocationEnabled
(checkRevocation);
}
} else {
v = Validator.getInstance(validatorType, variant, pkixParams);
}
return v;
}
private static X509Certificate[] validate(Validator v,
X509Certificate[] chain, String authType) throws CertificateException {
Object o = JsseJce.beginFipsProvider();
try {
return v.validate(chain, null, authType);
} finally {
JsseJce.endFipsProvider(o);
}
}
/**
* Returns true if the client certificate can be trusted.
*
* @param chain certificates which establish an identity for the client.
* Chains of arbitrary length are supported, and certificates
* marked internally as trusted will short-circuit signature checks.
* @throws IllegalArgumentException if null or zero-length chain
* is passed in for the chain parameter or if null or zero-length
* string is passed in for the authType parameter.
* @throws CertificateException if the certificate chain is not trusted
* by this TrustManager.
*/
public void checkClientTrusted(X509Certificate chain[], String authType)
throws CertificateException {
if (chain == null || chain.length == 0) {
throw new IllegalArgumentException(
"null or zero-length certificate chain");
}
if (authType == null || authType.length() == 0) {
throw new IllegalArgumentException(
"null or zero-length authentication type");
}
// assume double checked locking with a volatile flag works
// (guaranteed under the new Tiger memory model)
Validator v = clientValidator;
if (v == null) {
synchronized (this) {
v = clientValidator;
if (v == null) {
v = getValidator(Validator.VAR_TLS_CLIENT);
clientValidator = v;
}
}
}
X509Certificate[] trustedChain = validate(v, chain, null);
if (debug != null && Debug.isOn("trustmanager")) {
System.out.println("Found trusted certificate:");
System.out.println(trustedChain[trustedChain.length - 1]);
}
}
/**
* Returns true if the server certifcate can be trusted.
*
* @param chain certificates which establish an identity for the server.
* Chains of arbitrary length are supported, and certificates
* marked internally as trusted will short-circuit signature checks.
* @throws IllegalArgumentException if null or zero-length chain
* is passed in for the chain parameter or if null or zero-length
* string is passed in for the authType parameter.
* @throws CertificateException if the certificate chain is not trusted
* by this TrustManager.
*/
public void checkServerTrusted(X509Certificate chain[], String authType)
throws CertificateException {
if (chain == null || chain.length == 0) {
throw new IllegalArgumentException(
"null or zero-length certificate chain");
}
if (authType == null || authType.length() == 0) {
throw new IllegalArgumentException(
"null or zero-length authentication type");
}
// assume double checked locking with a volatile flag works
// (guaranteed under the new Tiger memory model)
Validator v = serverValidator;
if (v == null) {
synchronized (this) {
v = serverValidator;
if (v == null) {
v = getValidator(Validator.VAR_TLS_SERVER);
serverValidator = v;
}
}
}
X509Certificate[] trustedChain = validate(v, chain, authType);
if (debug != null && Debug.isOn("trustmanager")) {
System.out.println("Found trusted certificate:");
System.out.println(trustedChain[trustedChain.length - 1]);
}
}
/**
* Returns a list of CAs accepted to authenticate entities for the
* specified purpose.
*
* @param purpose activity for which CAs should be trusted
* @return list of CAs accepted for authenticating such tasks
*/
public X509Certificate[] getAcceptedIssuers() {
X509Certificate[] certsArray = new X509Certificate[trustedCerts.size()];
trustedCerts.toArray(certsArray);
return certsArray;
}
/**
* Given the partial or complete certificate chain provided by the
* peer, check its identity and build a certificate path to a trusted
* root, return if it can be validated and is trusted for client SSL
* authentication based on the authentication type.
*/
public void checkClientTrusted(X509Certificate[] chain, String authType,
String hostname, String algorithm) throws CertificateException {
checkClientTrusted(chain, authType);
checkIdentity(hostname, chain[0], algorithm);
}
/**
* Given the partial or complete certificate chain provided by the
* peer, check its identity and build a certificate path to a trusted
* root, return if it can be validated and is trusted for server SSL
* authentication based on the authentication type.
*/
public void checkServerTrusted(X509Certificate[] chain, String authType,
String hostname, String algorithm) throws CertificateException {
checkServerTrusted(chain, authType);
checkIdentity(hostname, chain[0], algorithm);
}
// Identify the peer by its certificate and hostname.
private void checkIdentity(String hostname, X509Certificate cert,
String algorithm) throws CertificateException {
if (algorithm != null && algorithm.length() != 0) {
// if IPv6 strip off the "[]"
if (hostname != null && hostname.startsWith("[") &&
hostname.endsWith("]")) {
hostname = hostname.substring(1, hostname.length()-1);
}
if (algorithm.equalsIgnoreCase("HTTPS")) {
HostnameChecker.getInstance(HostnameChecker.TYPE_TLS).match(
hostname, cert);
} else if (algorithm.equalsIgnoreCase("LDAP")) {
HostnameChecker.getInstance(HostnameChecker.TYPE_LDAP).match(
hostname, cert);
} else {
throw new CertificateException(
"Unknown identification algorithm: " + algorithm);
}
}
}
}