1 files changed, 52 insertions, 0 deletions
diff --git a/tests/iketests/src/java/com/android/ike/ikev2/message/TestUtils.java b/tests/iketests/src/java/com/android/ike/ikev2/message/TestUtils.java
new file mode 100644
index 00000000..1fcdac06
--- /dev/null
+++ b/tests/iketests/src/java/com/android/ike/ikev2/message/TestUtils.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2018 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.ikev2.message;
+
+import android.util.Pair;
+
+import com.android.ike.ikev2.exceptions.IkeException;
+
+import java.nio.ByteBuffer;
+
+/** TestUtils provides utility methods for parsing Hex String */
+public final class TestUtils {
+
+    public static byte[] hexStringToByteArray(String hexString) throws IllegalArgumentException {
+        int len = hexString.length();
+        if (len % 2 != 0) {
+            throw new IllegalArgumentException("Invalid Hex String");
+        }
+        byte[] data = new byte[len / 2];
+        for (int i = 0; i < len; i += 2) {
+            data[i / 2] =
+                    (byte)
+                            ((Character.digit(hexString.charAt(i), 16) << 4)
+                                    + Character.digit(hexString.charAt(i + 1), 16));
+        }
+        return data;
+    }
+
+    public static IkePayload hexStringToIkePayload(
+            @IkePayload.PayloadType int payloadType, boolean isResp, String payloadHexString)
+            throws IkeException {
+        byte[] payloadBytes = hexStringToByteArray(payloadHexString);
+        // Returned Pair consists of the IkePayload and the following IkePayload's type.
+        Pair<IkePayload, Integer> pair =
+                IkePayloadFactory.getIkePayload(payloadType, isResp, ByteBuffer.wrap(payloadBytes));
+        return pair.first;
+    }
+}