Updated code.

Applet/AndroidSEProvider/src/com/android/javacard/keymaster/KMAESKey.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright(C) 2020 The Android Open Source Project
+ *
+ * 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" (short)0IS,
+ * 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 com.android.javacard.keymaster;
+
+import org.globalplatform.upgrade.Element;
+
+import com.android.javacard.keymaster.KMMasterKey;
+
+import javacard.security.AESKey;
+
+public class KMAESKey implements KMMasterKey {
+  private AESKey aesKey;
+
+  public KMAESKey(AESKey key) {
+    aesKey = key;
+  }
+
+  public void setKey(byte[] keyData, short kOff) {
+    aesKey.setKey(keyData, kOff);
+  }
+
+  public AESKey getKey() {
+    return aesKey;
+  }
+
+  public short getKeySizeBits() {
+    return aesKey.getSize();
+  }
+
+  public static void onSave(Element element, KMAESKey kmKey) {
+    element.write(kmKey.aesKey);
+  }
+
+  public static KMAESKey onRestore(Element element) {
+    AESKey aesKey = (AESKey) element.readObject();
+    KMAESKey kmKey = new KMAESKey(aesKey);
+    return kmKey;
+  }
+
+  public static short getBackupPrimitiveByteCount() {
+    return (short) 0;
+  }
+
+  public static short getBackupObjectCount() {
+    return (short) 1;
+  }
+
+}

Applet/AndroidSEProvider/src/com/android/javacard/keymaster/KMAndroidSEApplet.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright(C) 2020 The Android Open Source Project
+ *
+ * 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" (short)0IS,
+ * 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 com.android.javacard.keymaster;
 
 import org.globalplatform.upgrade.Element;