1 files changed, 125 insertions, 0 deletions
diff --git a/qpid/java/broker-core/src/main/java/org/apache/qpid/server/security/auth/sasl/external/ExternalSaslServer.java b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/security/auth/sasl/external/ExternalSaslServer.java
new file mode 100644
index 0000000000..e1007d91e0
--- /dev/null
+++ b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/security/auth/sasl/external/ExternalSaslServer.java
@@ -0,0 +1,125 @@
+/*
+ * 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.external;
+
+import java.security.Principal;
+
+import javax.security.auth.x500.X500Principal;
+import javax.security.sasl.SaslException;
+import javax.security.sasl.SaslServer;
+
+import org.apache.log4j.Logger;
+import org.apache.qpid.server.security.auth.UsernamePrincipal;
+import org.apache.qpid.transport.network.security.ssl.SSLUtil;
+
+public class ExternalSaslServer implements SaslServer
+{
+    private static final Logger LOGGER = Logger.getLogger(ExternalSaslServer.class);
+
+    public static final String MECHANISM = "EXTERNAL";
+
+    private boolean _complete = false;
+    private final Principal _externalPrincipal;
+    private boolean _useFullDN = false;
+
+    public ExternalSaslServer(Principal externalPrincipal, boolean useFullDN)
+    {
+        _useFullDN = useFullDN;
+        _externalPrincipal = externalPrincipal;
+    }
+
+    public String getMechanismName()
+    {
+        return MECHANISM;
+    }
+
+    public byte[] evaluateResponse(byte[] response) throws SaslException
+    {
+        _complete = true;
+        return null;
+    }
+
+    public boolean isComplete()
+    {
+        return _complete;
+    }
+
+    public String getAuthorizationID()
+    {
+        return getAuthenticatedPrincipal().getName();
+    }
+
+    public byte[] unwrap(byte[] incoming, int offset, int len) throws SaslException
+    {
+        throw new SaslException("Unsupported operation");
+    }
+
+    public byte[] wrap(byte[] outgoing, int offset, int len) throws SaslException
+    {
+        throw new SaslException("Unsupported operation");
+    }
+
+    public Object getNegotiatedProperty(String propName)
+    {
+        return null;
+    }
+
+    public void dispose() throws SaslException
+    {
+    }
+
+    public Principal getAuthenticatedPrincipal()
+    {
+        if (_externalPrincipal instanceof X500Principal && !_useFullDN)
+        {
+            // Construct username as <CN>@<DC1>.<DC2>.<DC3>....<DCN>
+            String username;
+            String dn = ((X500Principal) _externalPrincipal).getName(X500Principal.RFC2253);
+
+            if(LOGGER.isDebugEnabled())
+            {
+                LOGGER.debug("Parsing username from Principal DN: " + dn);
+            }
+
+            username = SSLUtil.getIdFromSubjectDN(dn);
+            if (username.isEmpty())
+            {
+                // CN is empty => Cannot construct username => Authentication failed => return null
+                if(LOGGER.isDebugEnabled())
+                {
+                    LOGGER.debug("CN value was empty in Principal name, unable to construct username");
+                }
+                return null;
+            }
+            if(LOGGER.isDebugEnabled())
+            {
+                LOGGER.debug("Constructing Principal with username: " + username);
+            }
+            return new UsernamePrincipal(username);
+        }
+        else
+        {
+            if(LOGGER.isDebugEnabled())
+            {
+                LOGGER.debug("Using external Principal: " + _externalPrincipal);
+            }
+            return _externalPrincipal;
+        }
+    }
+}