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package com.sun.enterprise.admin.util;
import java.io.Console;
import java.io.IOException;
import java.util.Date;
import java.util.Map;
import java.text.DateFormat;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;
import java.security.cert.CertificateException;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
import com.sun.enterprise.security.store.AsadminTruststore;
/**
* An implementation of {@link X509TrustManager} that provides basic support
* for Trust Management. It checks if the server is trusted and displays the
* certificate that was received from the server. The user is then prompted
* to confirm the certificate. If confirmed, the certificate is entered into
* the client side asadmintruststore (default name is ~/.asadmintruststore).
* Once in the truststore, the user is never prompted to confirm a second time.
*/
class AsadminTrustManager implements X509TrustManager {
private final Object _alias;
private boolean _alreadyInvoked;
private CertificateException _lastCertException;
private RuntimeException _lastRuntimeException;
private static final LocalStringsImpl strmgr =
new LocalStringsImpl(AsadminTrustManager.class);
/**
* Creates an instance of the AsadminTrustManager
* @param alias The toString() of the alias object concatenated with a
* date/time stamp is used as the alias of the trusted server certificate
* in the client side .asadmintruststore. When null,
* only a date / timestamp is used as an alias.
*/
public AsadminTrustManager(Object alias, Map env) {
_alias = alias;
_alreadyInvoked = false;
_lastCertException = null;
_lastRuntimeException = null;
}
/**
* Creates an instance of the SunOneBasicX509TrustManager
* A date/time stamp is used of the trusted server certificate in the
* client side .asadmintruststore.
*/
public AsadminTrustManager() {
this (null, null);
}
/**
* Checks if client is trusted given the certificate chain and
* authorization type string, e.g., "RSA".
* @throws {@link CertificateException}
* @throws {@link UnsupportedOperationException}
*/
public void checkClientTrusted(X509Certificate[] x509Certificate,
String authType) throws CertificateException {
throw new UnsupportedOperationException(
"Not Implemented for Client Trust Management");
}
/**
* Checs if the server is trusted.
* @param chain The server certificate to be validated.
* @param authType
* @throws CertificateException
*/
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
// The alreadyInvoked flag keeps track of whether we have already
// prompted the user. Unfortunately, checkServerTrusted is called
// two times and we want to avoid prompting the user twice. I'm not
// sure of the root cause of this problem (i.e., why it is called
// twice). In addition, we keep track of any exception that occurred
// on the first invocation and propagate that back.
if (!_alreadyInvoked) {
_alreadyInvoked = true;
try {
checkCertificate(chain);
} catch (RuntimeException ex) {
_lastRuntimeException = ex;
throw ex;
} catch (CertificateException ex) {
_lastCertException = ex;
throw ex;
}
} else {
if (_lastRuntimeException != null) {
throw _lastRuntimeException;
} else if (_lastCertException != null) {
throw _lastCertException;
}
}
}
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
/**
* Displays the certificate and prompts the user whether or
* not it is trusted.
* @param c
* @throws IOException
* @return true if the user trusts the certificate
*/
private boolean isItOKToAddCertToTrustStore(X509Certificate c)
throws IOException {
Console cons = System.console();
if (cons != null) {
cons.printf("%s%n", c.toString());
String result =
cons.readLine("%s", strmgr.get("certificateTrustPrompt"));
return result != null && result.equalsIgnoreCase("y");
} else {
return true;
}
}
private String getAliasName() {
String aliasName = _alias != null ? _alias.toString() : "";
// We append a timestamp to the alias to ensure that it is unqiue.
DateFormat f =
DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);
aliasName += ":" + f.format(new Date());
return aliasName;
}
/**
* This function validates the cert and ensures that it is trusted.
* @param chain
* @throws RuntimeException
* @throws CertificateException
*/
protected void checkCertificate(X509Certificate[] chain)
throws RuntimeException, CertificateException,
IllegalArgumentException {
if (chain == null || chain.length == 0) {
throw new IllegalArgumentException (strmgr.get(
"emptyServerCertificate"));
}
// First ensure that the certificate is valid.
for (int i = 0 ; i < chain.length ; i ++) {
chain[i].checkValidity();
}
try {
/*
* Open the trust store, prompting the user if needed for a valid
* password to use.
*/
AsadminTruststore truststore = AsadminTruststore.newInstance();
// if the certificate already exists in the truststore,
// it is implicitly trusted
if (!truststore.certificateExists(chain[0])) {
// if the certificate does not exist in the truststore,
// then we prompt the user. Upon confirmation from the user,
// the certificate is added to the truststore.
if (isItOKToAddCertToTrustStore(chain[0])) {
truststore.addCertificate(getAliasName(), chain[0]);
} else {
throw new CertificateException(strmgr.get(
"serverCertificateNotTrusted"));
}
}
} catch (CertificateException ex) {
throw ex;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
