1 files changed, 129 insertions, 0 deletions
diff --git a/smcc/src/main/java/at/gv/egiz/smcc/LogCardChannel.java b/smcc/src/main/java/at/gv/egiz/smcc/LogCardChannel.java
new file mode 100644
index 00000000..3fc80fa1
--- /dev/null
+++ b/smcc/src/main/java/at/gv/egiz/smcc/LogCardChannel.java
@@ -0,0 +1,129 @@
+/*
+* 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.nio.ByteBuffer;
+
+import javax.smartcardio.Card;
+import javax.smartcardio.CardChannel;
+import javax.smartcardio.CardException;
+import javax.smartcardio.CommandAPDU;
+import javax.smartcardio.ResponseAPDU;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+public class LogCardChannel extends CardChannel {
+  
+  protected static Log log = LogFactory.getLog(LogCardChannel.class);
+  
+  private CardChannel channel;
+  
+  public LogCardChannel(CardChannel channel) {
+    if (channel == null) {
+      throw new NullPointerException();
+    }
+    this.channel = channel;
+  }
+
+  @Override
+  public void close() throws CardException {
+    channel.close();
+  }
+
+  @Override
+  public Card getCard() {
+    return channel.getCard();
+  }
+
+  @Override
+  public int getChannelNumber() {
+    return channel.getChannelNumber();
+  }
+
+  @Override
+  public ResponseAPDU transmit(CommandAPDU command) throws CardException {
+    if (log.isTraceEnabled()) {
+      switch (command.getINS()) {
+      case 0x20:    // VERIFY
+      case 0x21:    // VERIFY
+      case 0x24: {  // CHANGE REFERENCE DATA 
+        // Don't log possibly sensitive command data 
+        StringBuilder sb = new StringBuilder();
+        sb.append(command);
+        sb.append('\n');
+        byte[] c = new byte[4];
+        c[0] = (byte) command.getCLA();
+        c[1] = (byte) command.getINS();
+        c[2] = (byte) command.getP1();
+        c[3] = (byte) command.getP2();
+        sb.append(toString(c));
+        if (command.getNc() > 0) {
+          sb.append(':');
+          sb.append(toString(new byte[] {(byte) command.getNc()}));
+          for (int i = 0; i < command.getNc(); i++) {
+            sb.append(":XX");
+          }
+        }
+        if (command.getNe() > 0) {
+          sb.append(':');
+          sb.append(toString(new byte[] {(byte) command.getNe()}));
+        }
+        log.trace(sb.toString());
+      }; break;
+
+      default:
+        log.trace(command + "\n" + toString(command.getBytes()));
+      }
+      long t0 = System.currentTimeMillis();
+      ResponseAPDU response = channel.transmit(command);
+      long t1 = System.currentTimeMillis();
+      log.trace(response + " [" + (t1 - t0) + "ms]\n" + toString(response.getBytes()));
+      return response;
+    } else {
+      return channel.transmit(command);
+    }
+  }
+
+  @Override
+  public int transmit(ByteBuffer command, ByteBuffer response) throws CardException {
+    if (log.isTraceEnabled()) {
+      long t0 = System.currentTimeMillis();
+      int l = channel.transmit(command, response);
+      long t1 = System.currentTimeMillis();
+      log.trace("[" + (t1 - t0) + "ms]");
+      return l;
+    } else {
+      return channel.transmit(command, response);
+    }
+  }
+
+  private String toString(byte[] b) {
+    StringBuffer sb = new StringBuffer();
+    if (b != null && b.length > 0) {
+      sb.append(Integer.toHexString((b[0] & 240) >> 4));
+      sb.append(Integer.toHexString(b[0] & 15));
+    }
+    for (int i = 1; i < b.length; i++) {
+      sb.append(':');
+      sb.append(Integer.toHexString((b[i] & 240) >> 4));
+      sb.append(Integer.toHexString(b[i] & 15));
+    }
+    return sb.toString();
+  }
+  
+}