Define EAP_AT_KDF attribute for EAP-AKA'.

Bug: 142663198
Test: added AtKdfTest.
Test: atest FrameworksIkeTests
Change-Id: I6b9f6e1fe98c10f4a20f1525409a8340ccfaebdf

2 files changed, 81 insertions, 0 deletions

diff --git a/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/AtKdfTest.java b/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/AtKdfTest.java
new file mode 100644
index 00000000..0a1209c8
--- /dev/null
+++ b/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/AtKdfTest.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2019 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" 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 com.android.ike.eap.message.simaka.attributes;
+
+import static com.android.ike.eap.message.simaka.EapSimAkaAttribute.EAP_AT_KDF;
+import static com.android.ike.eap.message.simaka.attributes.EapTestAttributeDefinitions.AT_KDF;
+import static com.android.ike.eap.message.simaka.attributes.EapTestAttributeDefinitions.AT_KDF_INVALID_LENGTH;
+import static com.android.ike.eap.message.simaka.attributes.EapTestAttributeDefinitions.KDF_VERSION;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.fail;
+
+import com.android.ike.eap.exceptions.simaka.EapSimAkaInvalidAttributeException;
+import com.android.ike.eap.message.simaka.EapAkaPrimeAttributeFactory;
+import com.android.ike.eap.message.simaka.EapSimAkaAttribute;
+import com.android.ike.eap.message.simaka.EapSimAkaAttribute.AtKdf;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.nio.ByteBuffer;
+
+public class AtKdfTest {
+    private EapAkaPrimeAttributeFactory mAttributeFactory;
+
+    @Before
+    public void setUp() {
+        mAttributeFactory = EapAkaPrimeAttributeFactory.getInstance();
+    }
+
+    @Test
+    public void testDecode() throws Exception {
+        ByteBuffer input = ByteBuffer.wrap(AT_KDF);
+        EapSimAkaAttribute result = mAttributeFactory.getAttribute(input);
+
+        assertFalse(input.hasRemaining());
+        AtKdf atKdf = (AtKdf) result;
+        assertEquals(EAP_AT_KDF, atKdf.attributeType);
+        assertEquals(AT_KDF.length, atKdf.lengthInBytes);
+        assertEquals(KDF_VERSION, atKdf.kdf);
+    }
+
+    @Test
+    public void testDecodeInvalidLength() throws Exception {
+        ByteBuffer input = ByteBuffer.wrap(AT_KDF_INVALID_LENGTH);
+        try {
+            mAttributeFactory.getAttribute(input);
+            fail("Expected EapSimAkaInvalidAttributeException for invalid length");
+        } catch (EapSimAkaInvalidAttributeException expected) {
+        }
+    }
+
+    @Test
+    public void testEncode() throws Exception {
+        AtKdf atKdf = new AtKdf(KDF_VERSION);
+        ByteBuffer result = ByteBuffer.allocate(AT_KDF.length);
+
+        atKdf.encode(result);
+        assertArrayEquals(AT_KDF, result.array());
+        assertFalse(result.hasRemaining());
+    }
+}
diff --git a/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/EapTestAttributeDefinitions.java b/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/EapTestAttributeDefinitions.java
index ba30724c..b9007131 100644
--- a/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/EapTestAttributeDefinitions.java
+++ b/tests/iketests/src/java/com/android/ike/eap/message/simaka/attributes/EapTestAttributeDefinitions.java
@@ -80,6 +80,8 @@ public class EapTestAttributeDefinitions {
     public static final byte[] AT_KDF_INPUT =
             hexStringToByteArray("1704000B" + NETWORK_NAME_HEX + "00");
     public static final byte[] AT_KDF_INPUT_EMPTY_NETWORK_NAME = hexStringToByteArray("17010000");
+    public static final int KDF_VERSION = 1;
+    public static final byte[] AT_KDF = hexStringToByteArray("18010001");
 
     public static final byte[] AT_VERSION_LIST_INVALID_LENGTH = hexStringToByteArray("0F020003");
     public static final byte[] AT_SELECTED_VERSION_INVALID_LENGTH =
@@ -110,4 +112,5 @@ public class EapTestAttributeDefinitions {
     public static final byte[] AT_RES_LONG_RES =
             hexStringToByteArray("0306008800112233445566778899AABBCCDDEEFF11000000");
     public static final byte[] AT_AUTS_INVALID_LENGTH = hexStringToByteArray("03010000");
+    public static final byte[] AT_KDF_INVALID_LENGTH = hexStringToByteArray("18020001");
 }