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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 com.android.internal.net.eap.message.EapData.EAP_IDENTITY;
import static com.android.internal.net.eap.message.EapData.EAP_TYPE_SIM;
import static com.android.internal.net.eap.message.EapMessage.EAP_CODE_FAILURE;
import static com.android.internal.net.eap.message.EapMessage.EAP_CODE_REQUEST;
import static com.android.internal.net.eap.message.EapMessage.EAP_CODE_SUCCESS;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.EAP_SIM_IDENTITY;
import static com.android.internal.net.eap.message.EapTestMessageDefinitions.EAP_SIM_RESPONSE_WITHOUT_IDENTITY;
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.EapSimAkaAttribute.EAP_AT_ANY_ID_REQ;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.EAP_AT_ENCR_DATA;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.EAP_AT_IV;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.EAP_AT_MAC;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.EAP_AT_PERMANENT_ID_REQ;
import static com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.EAP_AT_VERSION_LIST;
import static com.android.internal.net.eap.message.simaka.EapSimTypeData.EAP_SIM_CHALLENGE;
import static com.android.internal.net.eap.message.simaka.EapSimTypeData.EAP_SIM_START;
import static com.android.internal.net.eap.message.simaka.attributes.EapTestAttributeDefinitions.NONCE_MT;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.ArgumentMatchers.eq;
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 com.android.internal.net.eap.EapResult;
import com.android.internal.net.eap.EapResult.EapError;
import com.android.internal.net.eap.EapResult.EapFailure;
import com.android.internal.net.eap.EapResult.EapResponse;
import com.android.internal.net.eap.exceptions.EapInvalidRequestException;
import com.android.internal.net.eap.exceptions.simaka.EapSimAkaIdentityUnavailableException;
import com.android.internal.net.eap.message.EapData;
import com.android.internal.net.eap.message.EapMessage;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtAnyIdReq;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtIdentity;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtMac;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtNonceMt;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtPermanentIdReq;
import com.android.internal.net.eap.message.simaka.EapSimAkaAttribute.AtVersionList;
import com.android.internal.net.eap.message.simaka.EapSimAkaTypeData.DecodeResult;
import com.android.internal.net.eap.message.simaka.EapSimTypeData;
import com.android.internal.net.eap.statemachine.EapMethodStateMachine.FinalState;
import com.android.internal.net.eap.statemachine.EapSimMethodStateMachine.ChallengeState;
import com.android.internal.net.eap.statemachine.EapSimMethodStateMachine.StartState;
import com.android.internal.net.utils.Log;
import org.junit.Before;
import org.junit.Test;
import java.util.Arrays;
import java.util.LinkedHashMap;
public class EapSimStartStateTest extends EapSimStateTest {
private StartState mStartState;
private LinkedHashMap<Integer, EapSimAkaAttribute> mAttributes;
@Before
public void setUp() {
super.setUp();
AtNonceMt atNonceMt = null;
try {
atNonceMt = new AtNonceMt(NONCE_MT);
} catch (Exception e) {
fail("Failed to create AtNonceMt attribute in setUp()");
}
mStartState = mEapSimMethodStateMachine.new StartState(atNonceMt);
mEapSimMethodStateMachine.transitionTo(mStartState);
mAttributes = new LinkedHashMap<>();
}
@Test
public void testProcessSuccess() throws Exception {
EapMessage input = new EapMessage(EAP_CODE_SUCCESS, ID_INT, null);
EapResult result = mStartState.process(input);
EapError eapError = (EapError) result;
assertTrue(eapError.cause instanceof EapInvalidRequestException);
}
@Test
public void testProcessFailure() throws Exception {
EapMessage input = new EapMessage(EAP_CODE_FAILURE, ID_INT, null);
EapResult result = mStartState.process(input);
assertTrue(mEapSimMethodStateMachine.getState() instanceof FinalState);
assertTrue(result instanceof EapFailure);
}
@Test
public void testProcessIncorrectEapMethodType() throws Exception {
EapData eapData = new EapData(EAP_IDENTITY, DUMMY_EAP_TYPE_DATA);
EapMessage eapMessage = new EapMessage(EAP_CODE_REQUEST, ID_INT, eapData);
EapResult result = mStartState.process(eapMessage);
EapError eapError = (EapError) result;
assertTrue(eapError.cause instanceof EapInvalidRequestException);
}
@Test
public void testIsValidStartAttributes() throws Exception {
mAttributes.put(EAP_AT_VERSION_LIST, new AtVersionList(8, 1));
mAttributes.put(EAP_AT_PERMANENT_ID_REQ, new AtPermanentIdReq());
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertTrue(mStartState.isValidStartAttributes(eapSimTypeData));
}
@Test
public void testIsValidStartAttributesMissingVersionList() throws Exception {
mAttributes.put(EAP_AT_PERMANENT_ID_REQ, new AtPermanentIdReq());
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertFalse(mStartState.isValidStartAttributes(eapSimTypeData));
}
@Test
public void testIsValidStartAttributesMultipleIdRequests() throws Exception {
mAttributes.put(EAP_AT_VERSION_LIST, new AtVersionList(8, 1));
mAttributes.put(EAP_AT_PERMANENT_ID_REQ, new AtPermanentIdReq());
mAttributes.put(EAP_AT_ANY_ID_REQ, new AtAnyIdReq());
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertFalse(mStartState.isValidStartAttributes(eapSimTypeData));
}
@Test
public void testIsValidStartAttributesInvalidAttributes() throws Exception {
mAttributes.put(EAP_AT_VERSION_LIST, new AtVersionList(8, 1));
mAttributes.put(EAP_AT_PERMANENT_ID_REQ, new AtPermanentIdReq());
mAttributes.put(EAP_AT_MAC, new AtMac());
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertFalse(mStartState.isValidStartAttributes(eapSimTypeData));
mAttributes.remove(EAP_AT_MAC);
mAttributes.put(EAP_AT_IV, null); // just need <K, V> pair in the map
eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertFalse(mStartState.isValidStartAttributes(eapSimTypeData));
mAttributes.remove(EAP_AT_IV);
mAttributes.put(EAP_AT_ENCR_DATA, null); // just need <K, V> pair in the map
eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
assertFalse(mStartState.isValidStartAttributes(eapSimTypeData));
}
@Test
public void testAddIdentityAttributeToResponse() throws Exception {
EapSimTypeData eapSimTypeData = new EapSimTypeData(
EAP_SIM_START, Arrays.asList(new AtPermanentIdReq()));
when(mMockTelephonyManager.getSubscriberId()).thenReturn(IMSI);
AtIdentity atIdentity = mStartState.getIdentityResponse(eapSimTypeData);
assertArrayEquals(EAP_SIM_IDENTITY.getBytes(), mStartState.mIdentity);
verify(mMockTelephonyManager).getSubscriberId();
assertArrayEquals(EAP_SIM_IDENTITY.getBytes(), atIdentity.identity);
verifyNoMoreInteractions(mMockTelephonyManager);
}
@Test
public void testAddIdentityAttributeToResponseImsiUnavailable() throws Exception {
EapMessage eapMessage = new EapMessage(
EAP_CODE_REQUEST,
ID_INT,
new EapData(EAP_TYPE_SIM, DUMMY_EAP_TYPE_DATA));
mAttributes.put(EAP_AT_VERSION_LIST, new AtVersionList(8, 1));
mAttributes.put(EAP_AT_PERMANENT_ID_REQ, new AtPermanentIdReq());
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, mAttributes);
DecodeResult decodeResult = new DecodeResult(eapSimTypeData);
when(mMockEapSimTypeDataDecoder.decode(DUMMY_EAP_TYPE_DATA)).thenReturn(decodeResult);
when(mMockTelephonyManager.getSubscriberId()).thenReturn(null);
EapResult result = mStartState.process(eapMessage);
EapError eapError = (EapError) result;
assertTrue(eapError.cause instanceof EapSimAkaIdentityUnavailableException);
verify(mMockTelephonyManager).getSubscriberId();
verifyNoMoreInteractions(mMockTelephonyManager);
}
@Test
public void testAddIdentityAttributeToResponseNoIdRequest() throws Exception {
EapSimTypeData eapSimTypeData = new EapSimTypeData(EAP_SIM_START, Arrays.asList());
AtIdentity atIdentity = mStartState.getIdentityResponse(eapSimTypeData);
assertNull(atIdentity);
verifyNoMoreInteractions(mMockTelephonyManager);
}
@Test
public void testProcessWithoutIdentityRequest() throws Exception {
EapMessage eapMessage =
new EapMessage(
EAP_CODE_REQUEST, ID_INT, new EapData(EAP_TYPE_SIM, DUMMY_EAP_TYPE_DATA));
// Send EAP-SIM/Start message without Identity request
mAttributes.put(EAP_AT_VERSION_LIST, new AtVersionList(8, 1));
DecodeResult eapSimStartDecodeResult =
new DecodeResult(new EapSimTypeData(EAP_SIM_START, mAttributes));
when(mMockEapSimTypeDataDecoder.decode(DUMMY_EAP_TYPE_DATA))
.thenReturn(eapSimStartDecodeResult);
EapResult result = mEapSimMethodStateMachine.process(eapMessage);
EapResponse eapResponse = (EapResponse) result;
assertArrayEquals(
Log.byteArrayToHexString(eapResponse.packet),
EAP_SIM_RESPONSE_WITHOUT_IDENTITY,
eapResponse.packet);
verify(mMockEapSimTypeDataDecoder).decode(eq(DUMMY_EAP_TYPE_DATA));
// Send EAP-SIM/Challenge message
DecodeResult eapSimChallengeDecodeResult =
new DecodeResult(new EapSimTypeData(EAP_SIM_CHALLENGE, new LinkedHashMap<>()));
when(mMockEapSimTypeDataDecoder.decode(DUMMY_EAP_TYPE_DATA))
.thenReturn(eapSimChallengeDecodeResult);
// We only care about the transition to ChallengeState - the response doesn't matter
mEapSimMethodStateMachine.process(eapMessage);
ChallengeState challengeState = (ChallengeState) mEapSimMethodStateMachine.getState();
assertArrayEquals(EAP_IDENTITY_BYTES, challengeState.mIdentity);
// verify decode called 3x times:
// 1. decode in EAP-SIM/Start test above
// 2. decode in EAP-SIM/Challenge test for StartState
// 3. decode in EAP-SIM/Challenge test for ChallengeState
verify(mMockEapSimTypeDataDecoder, times(3)).decode(eq(DUMMY_EAP_TYPE_DATA));
}
}
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