1 files changed, 110 insertions, 0 deletions
diff --git a/smcc/src/main/java/at/gv/egiz/smcc/ExclSignatureCardProxy.java b/smcc/src/main/java/at/gv/egiz/smcc/ExclSignatureCardProxy.java
new file mode 100644
index 00000000..bfbd0063
--- /dev/null
+++ b/smcc/src/main/java/at/gv/egiz/smcc/ExclSignatureCardProxy.java
@@ -0,0 +1,110 @@
+/*
+* Copyright 2008 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed 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 at.gv.egiz.smcc;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.ArrayList;
+
+import javax.smartcardio.Card;
+import javax.smartcardio.CardException;
+import javax.smartcardio.CardTerminal;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+public class ExclSignatureCardProxy implements InvocationHandler {
+  
+  private static Log log = LogFactory.getLog(ExclSignatureCardProxy.class);
+
+  private static final Method init;
+  
+  static {
+    try {
+      init = SignatureCard.class.getMethod("init", new Class<?>[] { Card.class,
+          CardTerminal.class });
+    } catch (SecurityException e) {
+      throw new RuntimeException(e);
+    } catch (NoSuchMethodException e) {
+      throw new RuntimeException(e);
+    }
+  }
+  
+  private SignatureCard signatureCard;
+  
+  public ExclSignatureCardProxy(SignatureCard signatureCard) {
+    this.signatureCard = signatureCard;
+  }
+
+  public static SignatureCard newInstance(SignatureCard signatureCard) {
+    ArrayList<Class<?>> proxyInterfaces = new ArrayList<Class<?>>();
+    proxyInterfaces.add(SignatureCard.class);
+    if (PINMgmtSignatureCard.class.isAssignableFrom(signatureCard.getClass())) {
+      proxyInterfaces.add(PINMgmtSignatureCard.class);
+    }
+    ClassLoader loader = signatureCard.getClass().getClassLoader();
+    return (SignatureCard) Proxy.newProxyInstance(loader, proxyInterfaces
+        .toArray(new Class[proxyInterfaces.size()]),
+        new ExclSignatureCardProxy(signatureCard));
+  }
+  
+  public static PINMgmtSignatureCard newInstance(PINMgmtSignatureCard signatureCard) {
+    return null;
+  }
+
+  @Override
+  public Object invoke(Object proxy, Method method, Object[] args)
+      throws Throwable {
+
+    Card card = null;
+    
+    Method target = signatureCard.getClass().getMethod(method.getName(),
+        method.getParameterTypes());
+    
+    if (target.isAnnotationPresent(Exclusive.class)) {
+      card = (Card) ((method.equals(init)) 
+        ? args[0]
+        : signatureCard.getCard());
+    }
+    
+    if (card != null) {
+      try {
+        log.trace("Invoking method " + method.getName() + "() with exclusive access.");
+        card.beginExclusive();
+      } catch (CardException e) {
+        log.info("Failed to get exclusive access to signature card "
+            + signatureCard.toString() + ".");
+        throw new SignatureCardException(e);
+      }
+    }
+      
+    try {
+      return method.invoke(signatureCard, args);
+    } catch (InvocationTargetException e) {
+      throw e.getTargetException();
+    } finally {
+      if (card != null) {
+        card.endExclusive();
+      }
+    }
+    
+  
+  }
+
+}