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/*
* Copyright (c) 2009, 2011, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.net.www.protocol.http;
import java.net.URL;
import java.net.PasswordAuthentication;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import sun.util.logging.PlatformLogger;
/**
* Proxy class for loading NTLMAuthentication, so as to remove static
* dependancy.
*/
class NTLMAuthenticationProxy {
private static Method supportsTA;
private static Method isTrustedSite;
private static final String clazzStr = "sun.net.www.protocol.http.ntlm.NTLMAuthentication";
private static final String supportsTAStr = "supportsTransparentAuth";
private static final String isTrustedSiteStr = "isTrustedSite";
static final NTLMAuthenticationProxy proxy = tryLoadNTLMAuthentication();
static final boolean supported = proxy != null ? true : false;
static final boolean supportsTransparentAuth = supported ? supportsTransparentAuth() : false;
private final Constructor<? extends AuthenticationInfo> threeArgCtr;
private final Constructor<? extends AuthenticationInfo> fiveArgCtr;
private NTLMAuthenticationProxy(Constructor<? extends AuthenticationInfo> threeArgCtr,
Constructor<? extends AuthenticationInfo> fiveArgCtr) {
this.threeArgCtr = threeArgCtr;
this.fiveArgCtr = fiveArgCtr;
}
AuthenticationInfo create(boolean isProxy,
URL url,
PasswordAuthentication pw) {
try {
return threeArgCtr.newInstance(isProxy, url, pw);
} catch (ReflectiveOperationException roe) {
finest(roe);
}
return null;
}
AuthenticationInfo create(boolean isProxy,
String host,
int port,
PasswordAuthentication pw) {
try {
return fiveArgCtr.newInstance(isProxy, host, port, pw);
} catch (ReflectiveOperationException roe) {
finest(roe);
}
return null;
}
/* Returns true if the NTLM implementation supports transparent
* authentication (try with the current users credentials before
* prompting for username and password, etc).
*/
private static boolean supportsTransparentAuth() {
try {
return (Boolean)supportsTA.invoke(null);
} catch (ReflectiveOperationException roe) {
finest(roe);
}
return false;
}
/* Transparent authentication should only be tried with a trusted
* site ( when running in a secure environment ).
*/
public static boolean isTrustedSite(URL url) {
try {
return (Boolean)isTrustedSite.invoke(null, url);
} catch (ReflectiveOperationException roe) {
finest(roe);
}
return false;
}
/**
* Loads the NTLM authentiation implementation through reflection. If
* the class is present, then it must have the required constructors and
* method. Otherwise, it is considered an error.
*/
@SuppressWarnings("unchecked")
private static NTLMAuthenticationProxy tryLoadNTLMAuthentication() {
Class<? extends AuthenticationInfo> cl;
Constructor<? extends AuthenticationInfo> threeArg, fiveArg;
try {
cl = (Class<? extends AuthenticationInfo>)Class.forName(clazzStr, true, null);
if (cl != null) {
threeArg = cl.getConstructor(boolean.class,
URL.class,
PasswordAuthentication.class);
fiveArg = cl.getConstructor(boolean.class,
String.class,
int.class,
PasswordAuthentication.class);
supportsTA = cl.getDeclaredMethod(supportsTAStr);
isTrustedSite = cl.getDeclaredMethod(isTrustedSiteStr, java.net.URL.class);
return new NTLMAuthenticationProxy(threeArg,
fiveArg);
}
} catch (ClassNotFoundException cnfe) {
finest(cnfe);
} catch (ReflectiveOperationException roe) {
throw new AssertionError(roe);
}
return null;
}
static void finest(Exception e) {
PlatformLogger logger = HttpURLConnection.getHttpLogger();
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("NTLMAuthenticationProxy: " + e);
}
}
}
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