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/*
*
* 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.qpid.server.security.auth.sasl;
import java.io.File;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.Principal;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.login.AccountNotFoundException;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import junit.framework.TestCase;
import org.apache.commons.codec.binary.Hex;
import org.apache.qpid.server.security.auth.database.Base64MD5PasswordFilePrincipalDatabase;
import org.apache.qpid.server.security.auth.sasl.crammd5.CRAMMD5HexInitialiser;
import org.apache.qpid.server.security.auth.sasl.crammd5.CRAMMD5HexSaslServer;
import org.apache.qpid.server.security.auth.sasl.crammd5.CRAMMD5HexServerFactory;
/**
* Test for the CRAM-MD5-HEX SASL mechanism.
*
* This test case focuses on testing {@link CRAMMD5HexSaslServer} but also exercises
* collaborators {@link CRAMMD5HexInitialiser} and {@link Base64MD5PasswordFilePrincipalDatabase}
*/
public class CRAMMD5HexServerTest extends TestCase
{
private SaslServer _saslServer; // Class under test
private CRAMMD5HexServerFactory _saslFactory;
@Override
protected void setUp() throws Exception
{
super.setUp();
CRAMMD5HexInitialiser _initializer = new CRAMMD5HexInitialiser();
//Use properties to create a PrincipalDatabase
Base64MD5PasswordFilePrincipalDatabase db = createTestPrincipalDatabase();
assertEquals("Unexpected number of test users in the db", 2, db.getUsers().size());
_initializer.initialise(db);
_saslFactory = new CRAMMD5HexServerFactory();
_saslServer = _saslFactory.createSaslServer(CRAMMD5HexSaslServer.MECHANISM,
"AMQP",
"localhost",
_initializer.getProperties(),
_initializer.getCallbackHandler());
assertNotNull("Unable to create saslServer with mechanism type " + CRAMMD5HexSaslServer.MECHANISM, _saslServer);
}
public void testSuccessfulAuth() throws Exception
{
final byte[] serverChallenge = _saslServer.evaluateResponse(new byte[0]);
// Generate client response
final byte[] clientResponse = generateClientResponse("knownuser", "guest", serverChallenge);
byte[] nextServerChallenge = _saslServer.evaluateResponse(clientResponse);
assertTrue("Exchange must be flagged as complete after successful authentication", _saslServer.isComplete());
assertNull("Next server challenge must be null after successful authentication", nextServerChallenge);
}
public void testKnownUserPresentsWrongPassword() throws Exception
{
byte[] serverChallenge = _saslServer.evaluateResponse(new byte[0]);
final byte[] clientResponse = generateClientResponse("knownuser", "wrong!", serverChallenge);
try
{
_saslServer.evaluateResponse(clientResponse);
fail("Exception not thrown");
}
catch (SaslException se)
{
// PASS
}
assertFalse("Exchange must not be flagged as complete after unsuccessful authentication", _saslServer.isComplete());
}
public void testUnknownUser() throws Exception
{
final byte[] serverChallenge = _saslServer.evaluateResponse(new byte[0]);
final byte[] clientResponse = generateClientResponse("unknownuser", "guest", serverChallenge);
try
{
_saslServer.evaluateResponse(clientResponse);
fail("Exception not thrown");
}
catch (SaslException se)
{
assertExceptionHasUnderlyingAsCause(AccountNotFoundException.class, se);
// PASS
}
assertFalse("Exchange must not be flagged as complete after unsuccessful authentication", _saslServer.isComplete());
}
/**
*
* Demonstrates QPID-3158. A defect meant that users with some valid password were failing to
* authenticate when using the .NET 0-8 client (uses this SASL mechanism).
* It so happens that password "guest2" was one of the affected passwords.
*
* @throws Exception
*/
public void testSuccessfulAuthReproducingQpid3158() throws Exception
{
byte[] serverChallenge = _saslServer.evaluateResponse(new byte[0]);
// Generate client response
byte[] resp = generateClientResponse("qpid3158user", "guest2", serverChallenge);
byte[] nextServerChallenge = _saslServer.evaluateResponse(resp);
assertTrue("Exchange must be flagged as complete after successful authentication", _saslServer.isComplete());
assertNull("Next server challenge must be null after successful authentication", nextServerChallenge);
}
/**
* Since we don't have a CRAM-MD5-HEX implementation client implementation in Java, this method
* provides the implementation for first principals.
*
* @param userId user id
* @param clearTextPassword clear text password
* @param serverChallenge challenge from server
*
* @return challenge response
*/
private byte[] generateClientResponse(final String userId, final String clearTextPassword, final byte[] serverChallenge) throws Exception
{
byte[] digestedPasswordBytes = MessageDigest.getInstance("MD5").digest(clearTextPassword.getBytes());
char[] hexEncodedDigestedPassword = Hex.encodeHex(digestedPasswordBytes);
byte[] hexEncodedDigestedPasswordBytes = new String(hexEncodedDigestedPassword).getBytes();
Mac hmacMd5 = Mac.getInstance("HmacMD5");
hmacMd5.init(new SecretKeySpec(hexEncodedDigestedPasswordBytes, "HmacMD5"));
final byte[] messageAuthenticationCode = hmacMd5.doFinal(serverChallenge);
// Build client response
String responseAsString = userId + " " + new String(Hex.encodeHex(messageAuthenticationCode));
byte[] resp = responseAsString.getBytes();
return resp;
}
/**
* Creates a test principal database.
*
* @return
* @throws IOException
*/
private Base64MD5PasswordFilePrincipalDatabase createTestPrincipalDatabase() throws IOException
{
Base64MD5PasswordFilePrincipalDatabase db = new Base64MD5PasswordFilePrincipalDatabase();
File file = File.createTempFile("passwd", "db");
file.deleteOnExit();
db.setPasswordFile(file.getCanonicalPath());
db.createPrincipal( createTestPrincipal("knownuser"), "guest".toCharArray());
db.createPrincipal( createTestPrincipal("qpid3158user"), "guest2".toCharArray());
return db;
}
private Principal createTestPrincipal(final String name)
{
return new Principal()
{
@Override
public String getName()
{
return name;
}
};
}
private void assertExceptionHasUnderlyingAsCause(final Class<? extends Throwable> expectedUnderlying, Throwable e)
{
assertNotNull(e);
int infiniteLoopGuard = 0; // Guard against loops in the cause chain
boolean foundExpectedUnderlying = false;
while (e.getCause() != null && infiniteLoopGuard++ < 10)
{
if (expectedUnderlying.equals(e.getCause().getClass()))
{
foundExpectedUnderlying = true;
break;
}
e = e.getCause();
}
if (!foundExpectedUnderlying)
{
fail("Not found expected underlying exception " + expectedUnderlying + " as underlying cause of " + e.getClass());
}
}
}
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