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/*
* 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.internal.net.eap.statemachine;
import static android.telephony.TelephonyManager.APPTYPE_USIM;
import static com.android.internal.net.TestUtils.hexStringToByteArray;
import static com.android.internal.net.eap.message.EapData.EAP_TYPE_AKA;
import static com.android.internal.net.eap.message.EapMessage.EAP_CODE_REQUEST;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.EAP_AKA_CLIENT_ERROR_UNABLE_TO_PROCESS;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.EAP_AKA_NOTIFICATION_RESPONSE;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.ID_INT;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.IMSI;
import static com.android.internal.net.eap.message.simaka.EapAkaTypeData.EAP_AKA_IDENTITY;
import static com.android.internal.net.eap.message.simaka.EapAkaTypeData.EAP_AKA_NOTIFICATION;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtNotification.GENERAL_FAILURE_PRE_CHALLENGE;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
import android.net.eap.EapSessionConfig.EapAkaConfig;
import android.telephony.TelephonyManager;
import com.android.internal.net.eap.EapResult.EapError;
import com.android.internal.net.eap.EapResult.EapResponse;
import com.android.internal.net.eap.exceptions.EapInvalidRequestException;
import com.android.internal.net.eap.message.EapData;
import com.android.internal.net.eap.message.EapMessage;
import com.android.internal.net.eap.message.simaka.EapAkaTypeData;
import com.android.internal.net.eap.message.simaka.EapAkaTypeData.EapAkaTypeDataDecoder;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtAnyIdReq;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtNotification;
import com.android.internal.net.eap.message.simaka.EapSimAkaTypeData.DecodeResult;
import com.android.internal.net.eap.statemachine.EapAkaMethodStateMachine.CreatedState;
import org.junit.Before;
import org.junit.Test;
import java.util.Arrays;
public class EapAkaMethodStateMachineTest {
private static final int SUB_ID = 1;
private static final byte[] DUMMY_EAP_TYPE_DATA = hexStringToByteArray("112233445566");
// EAP-Identity = hex("test@android.net")
protected static final byte[] EAP_IDENTITY_BYTES =
hexStringToByteArray("7465737440616E64726F69642E6E6574");
protected TelephonyManager mMockTelephonyManager;
private EapAkaTypeDataDecoder mMockEapAkaTypeDataDecoder;
private EapAkaConfig mEapAkaConfig = new EapAkaConfig(SUB_ID, APPTYPE_USIM);
private EapAkaMethodStateMachine mEapAkaMethodStateMachine;
@Before
public void setUp() {
mMockTelephonyManager = mock(TelephonyManager.class);
mMockEapAkaTypeDataDecoder = mock(EapAkaTypeDataDecoder.class);
when(mMockTelephonyManager.createForSubscriptionId(SUB_ID))
.thenReturn(mMockTelephonyManager);
mEapAkaMethodStateMachine =
new EapAkaMethodStateMachine(
mMockTelephonyManager,
EAP_IDENTITY_BYTES,
mEapAkaConfig,
mMockEapAkaTypeDataDecoder,
false);
verify(mMockTelephonyManager).createForSubscriptionId(SUB_ID);
}
@Test
public void testEapAkaMethodStateMachineStartState() {
assertTrue(mEapAkaMethodStateMachine.getState() instanceof CreatedState);
}
@Test
public void testGetEapMethod() {
assertEquals(EAP_TYPE_AKA, mEapAkaMethodStateMachine.getEapMethod());
}
@Test
public void testEapAkaFailsOnMultipleAkaNotifications() throws Exception {
EapData eapData = new EapData(EAP_TYPE_AKA, DUMMY_EAP_TYPE_DATA);
EapMessage eapMessage = new EapMessage(EAP_CODE_REQUEST, ID_INT, eapData);
// First EAP-AKA/Notification
EapAkaTypeData notificationTypeData =
new EapAkaTypeData(
EAP_AKA_NOTIFICATION,
Arrays.asList(new AtNotification(GENERAL_FAILURE_PRE_CHALLENGE)));
DecodeResult<EapAkaTypeData> decodeResult = new DecodeResult<>(notificationTypeData);
when(mMockEapAkaTypeDataDecoder.decode(eq(DUMMY_EAP_TYPE_DATA))).thenReturn(decodeResult);
EapResponse eapResponse = (EapResponse) mEapAkaMethodStateMachine.process(eapMessage);
assertArrayEquals(EAP_AKA_NOTIFICATION_RESPONSE, eapResponse.packet);
verify(mMockEapAkaTypeDataDecoder).decode(DUMMY_EAP_TYPE_DATA);
verifyNoMoreInteractions(mMockTelephonyManager, mMockEapAkaTypeDataDecoder);
// Transition to IdentityState
decodeResult =
new DecodeResult<>(
new EapAkaTypeData(EAP_AKA_IDENTITY, Arrays.asList(new AtAnyIdReq())));
when(mMockEapAkaTypeDataDecoder.decode(eq(DUMMY_EAP_TYPE_DATA))).thenReturn(decodeResult);
when(mMockTelephonyManager.getSubscriberId()).thenReturn(IMSI);
eapResponse = (EapResponse) mEapAkaMethodStateMachine.process(eapMessage);
assertFalse(
"EAP-Request/AKA-Identity returned a Client-Error response",
Arrays.equals(EAP_AKA_CLIENT_ERROR_UNABLE_TO_PROCESS, eapResponse.packet));
// decoded in: previous 1 time + in CreatedState and IdentityState
verify(mMockEapAkaTypeDataDecoder, times(3)).decode(eq(DUMMY_EAP_TYPE_DATA));
verify(mMockTelephonyManager).getSubscriberId();
verifyNoMoreInteractions(mMockTelephonyManager, mMockEapAkaTypeDataDecoder);
// Second EAP-AKA/Notification
decodeResult = new DecodeResult<>(notificationTypeData);
when(mMockEapAkaTypeDataDecoder.decode(eq(DUMMY_EAP_TYPE_DATA))).thenReturn(decodeResult);
EapError eapError = (EapError) mEapAkaMethodStateMachine.process(eapMessage);
assertTrue(eapError.cause instanceof EapInvalidRequestException);
// decoded previous 3 times + 1
verify(mMockEapAkaTypeDataDecoder, times(4)).decode(DUMMY_EAP_TYPE_DATA);
verifyNoMoreInteractions(mMockTelephonyManager, mMockEapAkaTypeDataDecoder);
}
}
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