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Add initial support for SafetyNet, requiring DroidGuard Helper to be installed

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This commit is contained in:
Marvin W 2016-09-24 21:19:26 +02:00
parent 07ff44e3c6
commit 40835c3618
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GPG Key ID: 072E9235DB996F2A
11 changed files with 252 additions and 130 deletions
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3
.gitmodules vendored
View File

@ -13,3 +13,6 @@
[submodule "extern/vtm"]
path = extern/vtm
url = https://github.com/microg/android_external_vtm.git
[submodule "extern/RemoteDroidGuard"]
path = extern/RemoteDroidGuard
url = https://github.com/microg/android_packages_apps_RemoteDroidGuard.git

1
extern/RemoteDroidGuard vendored Submodule

@ -0,0 +1 @@
Subproject commit 99b7d04824112355ff820adbee1d35624c22f453

4
play-services-core/build.gradle
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@ -20,12 +20,14 @@ dependencies {
compile 'de.hdodenhof:circleimageview:1.2.1'
compile 'com.squareup.wire:wire-runtime:1.6.1'
compile project(":microg-ui-tools")
compile project(':microg-ui-tools')
compile project(':play-services-api')
compile project(':play-services-wearable')
compile project(':unifiednlp-base')
compile project(':wearable-lib')
compile project(':remote-droid-guard-lib')
compile project(':vtm-android')
compile project(':vtm-extras')
compile project(':vtm-jts')

7
play-services-core/src/main/java/org/microg/gms/checkin/CheckinManager.java
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@ -23,12 +23,9 @@ import android.content.Context;
import com.google.android.gms.R;
import org.microg.gms.auth.AuthManager;
import org.microg.gms.auth.AuthRequest;
import org.microg.gms.common.Constants;
import org.microg.gms.common.DeviceConfiguration;
import org.microg.gms.common.DeviceIdentifier;
import org.microg.gms.common.PhoneInfo;
import org.microg.gms.common.Utils;
import org.microg.gms.gservices.GServices;
@ -57,8 +54,8 @@ public class CheckinManager {
}
}
CheckinRequest request = CheckinClient.makeRequest(Utils.getBuild(context),
new DeviceConfiguration(context), new DeviceIdentifier(), new PhoneInfo(), info,
Utils.getLocale(context), accounts); // TODO
new DeviceConfiguration(context), Utils.getDeviceIdentifier(context),
Utils.getPhoneInfo(context), info, Utils.getLocale(context), accounts);
return handleResponse(context, CheckinClient.request(request));
}

12
play-services-core/src/main/java/org/microg/gms/common/PhoneInfo.java
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@ -16,8 +16,20 @@
package org.microg.gms.common;
import java.util.Random;
public class PhoneInfo {
public String cellOperator = "26207";
public String roaming = "mobile-notroaming";
public String simOperator = "26207";
public String imsi = randomImsi();
private String randomImsi() {
Random random = new Random();
StringBuilder sb = new StringBuilder(simOperator);
while (sb.length() < 15) {
sb.append(random.nextInt(10));
}
return sb.toString();
}
}

9
play-services-core/src/main/java/org/microg/gms/common/Utils.java
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@ -16,7 +16,6 @@
package org.microg.gms.common;
import android.Manifest;
import android.content.Context;
import android.support.v4.content.ContextCompat;
import android.widget.Toast;
@ -45,6 +44,14 @@ public class Utils {
return new Build();
}
public static DeviceIdentifier getDeviceIdentifier(Context context) {
return new DeviceIdentifier();
}
public static PhoneInfo getPhoneInfo(Context context) {
return new PhoneInfo();
}
public static boolean hasSelfPermissionOrNotify(Context context, String permission) {
if (ContextCompat.checkSelfPermission(context, permission) != PERMISSION_GRANTED) {
Toast.makeText(context, context.getString(R.string.lacking_permission_toast, permission), Toast.LENGTH_SHORT).show();

3
play-services-core/src/main/java/org/microg/gms/droidguard/DroidGuardService.java
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@ -16,6 +16,8 @@
package org.microg.gms.droidguard;
import android.util.Log;
import com.google.android.gms.common.internal.GetServiceRequest;
import com.google.android.gms.common.internal.IGmsCallbacks;
@ -31,5 +33,6 @@ public class DroidGuardService extends BaseService {
@Override
public void handleServiceRequest(IGmsCallbacks callback, GetServiceRequest request, GmsService service) {
// TODO
Log.d(TAG, "handleServiceRequest");
}
}

199
play-services-core/src/main/java/org/microg/gms/snet/Attestation.java Normal file
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@ -0,0 +1,199 @@
/*
* Copyright 2013-2016 microG Project Team
*
* 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 org.microg.gms.snet;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.util.Base64;
import android.util.Log;
import com.squareup.wire.Wire;
import org.microg.gms.common.Build;
import org.microg.gms.common.Constants;
import org.microg.gms.common.Utils;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.zip.GZIPInputStream;
import okio.ByteString;
public class Attestation {
private static final String TAG = "GmsSafetyNetAttest";
private static final String ATTEST_URL = "https://www.googleapis.com/androidcheck/v1/attestations/attest?alt=PROTO&key=AIzaSyDqVnJBjE5ymo--oBJt3On7HQx9xNm1RHA";
private Context context;
private String packageName;
private byte[] payload;
private String droidGaurdResult;
public Attestation(Context context, String packageName) {
this.context = context;
this.packageName = packageName;
}
public void setPayload(byte[] payload) {
this.payload = payload;
}
public byte[] buildPayload(byte[] nonce) {
this.droidGaurdResult = null;
SafetyNetData payload = new SafetyNetData.Builder()
.nonce(ByteString.of(nonce))
.currentTimeMs(System.currentTimeMillis())
.packageName(packageName)
.fileDigest(getPackageFileDigest())
.signatureDigest(getPackageSignatures())
.gmsVersionCode(Constants.MAX_REFERENCE_VERSION)
//.googleCn(false)
.seLinuxState(new SELinuxState(true, true))
.suCandidates(Collections.<FileState>emptyList())
.build();
return this.payload = payload.toByteArray();
}
public byte[] getPayload() {
return payload;
}
public String getPayloadHashBase64() {
try {
MessageDigest digest = getSha256Digest();
return Base64.encodeToString(digest.digest(payload), Base64.NO_WRAP);
} catch (NoSuchAlgorithmException e) {
Log.w(TAG, e);
return null;
}
}
private static MessageDigest getSha256Digest() throws NoSuchAlgorithmException {
return MessageDigest.getInstance("SHA-256");
}
public void setDroidGaurdResult(String droidGaurdResult) {
this.droidGaurdResult = droidGaurdResult;
}
private ByteString getPackageFileDigest() {
try {
FileInputStream is = new FileInputStream(new File(context.getPackageManager().getApplicationInfo(packageName, 0).sourceDir));
MessageDigest digest = getSha256Digest();
byte[] data = new byte[16384];
while (true) {
int read = is.read(data);
if (read < 0) break;
digest.update(data, 0, read);
}
return ByteString.of(digest.digest());
} catch (Exception e) {
Log.w(TAG, e);
return null;
}
}
@SuppressLint("PackageManagerGetSignatures")
private List<ByteString> getPackageSignatures() {
try {
PackageInfo pi = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
ArrayList<ByteString> res = new ArrayList<>();
MessageDigest digest = getSha256Digest();
for (Signature signature : pi.signatures) {
res.add(ByteString.of(digest.digest(signature.toByteArray())));
}
return res;
} catch (Exception e) {
Log.w(TAG, e);
return null;
}
}
public String attest() throws IOException {
if (payload == null) {
throw new IllegalStateException("missing payload");
}
if (droidGaurdResult == null || droidGaurdResult.isEmpty()) {
throw new IllegalStateException("missing droidGuard");
}
return attest(new AttestRequest(ByteString.of(payload), droidGaurdResult)).result;
}
private AttestResponse attest(AttestRequest request) throws IOException {
HttpURLConnection connection = (HttpURLConnection) new URL(ATTEST_URL).openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestProperty("content-type", "application/x-protobuf");
connection.setRequestProperty("Accept-Encoding", "gzip");
Build build = Utils.getBuild(context);
connection.setRequestProperty("User-Agent", "SafetyNet/" + Constants.MAX_REFERENCE_VERSION + " (" + build.device + " " + build.id + "); gzip");
OutputStream os = connection.getOutputStream();
os.write(request.toByteArray());
os.close();
if (connection.getResponseCode() != 200) {
byte[] bytes = null;
String ex = null;
try {
bytes = Utils.readStreamToEnd(connection.getErrorStream());
ex = new String(Utils.readStreamToEnd(new GZIPInputStream(new ByteArrayInputStream(bytes))));
} catch (Exception e) {
if (bytes != null) {
throw new IOException(getBytesAsString(bytes), e);
}
throw new IOException(connection.getResponseMessage(), e);
}
throw new IOException(ex);
}
InputStream is = connection.getInputStream();
AttestResponse response = new Wire().parseFrom(new GZIPInputStream(is), AttestResponse.class);
is.close();
return response;
}
private String getBytesAsString(byte[] bytes) {
if (bytes == null) return "null";
try {
CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
CharBuffer r = d.decode(ByteBuffer.wrap(bytes));
return r.toString();
} catch (Exception e) {
return Base64.encodeToString(bytes, Base64.NO_WRAP);
}
}
}

141
play-services-core/src/main/java/org/microg/gms/snet/SafetyNetClientServiceImpl.java
View File

@ -16,11 +16,8 @@
package org.microg.gms.snet;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.os.Bundle;
import android.os.RemoteException;
import android.util.Base64;
import android.util.Log;
@ -30,76 +27,26 @@ import com.google.android.gms.safetynet.AttestationData;
import com.google.android.gms.safetynet.HarmfulAppsData;
import com.google.android.gms.safetynet.internal.ISafetyNetCallbacks;
import com.google.android.gms.safetynet.internal.ISafetyNetService;
import com.squareup.wire.Wire;
import org.microg.gms.common.Constants;
import org.microg.gms.checkin.LastCheckinInfo;
import org.microg.gms.common.PackageUtils;
import org.microg.gms.common.Utils;
import org.microg.gms.droidguard.RemoteDroidGuardConnector;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import okio.ByteString;
public class SafetyNetClientServiceImpl extends ISafetyNetService.Stub {
private static final String TAG = "GmsSafetyNetClientImpl";
public static final String ATTEST_URL = "https://www.googleapis.com/androidcheck/v1/attestations/attest?alt=PROTO&key=AIzaSyDqVnJBjE5ymo--oBJt3On7HQx9xNm1RHA";
private Context context;
private String packageName;
private Attestation attestation;
public SafetyNetClientServiceImpl(Context context, String packageName) {
this.context = context;
this.packageName = packageName;
}
private ByteString getPackageFileDigest() {
try {
FileInputStream is = new FileInputStream(new File(context.getPackageManager().getApplicationInfo(packageName, 0).sourceDir));
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] data = new byte[16384];
while (true) {
int read = is.read(data);
if (read < 0) break;
digest.update(data, 0, read);
}
return ByteString.of(digest.digest());
} catch (Exception e) {
Log.w(TAG, e);
return null;
}
}
@SuppressLint("PackageManagerGetSignatures")
private List<ByteString> getPackageSignatures() {
try {
PackageInfo pi = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
ArrayList<ByteString> res = new ArrayList<>();
MessageDigest digest = MessageDigest.getInstance("SHA-256");
for (Signature signature : pi.signatures) {
res.add(ByteString.of(digest.digest(signature.toByteArray())));
}
return res;
} catch (Exception e) {
Log.w(TAG, e);
return null;
}
this.attestation = new Attestation(context, packageName);
}
@Override
@ -112,26 +59,21 @@ public class SafetyNetClientServiceImpl extends ISafetyNetService.Stub {
new Thread(new Runnable() {
@Override
public void run() {
SafetyNetData payload = new SafetyNetData.Builder()
.nonce(ByteString.of(nonce))
.currentTimeMs(System.currentTimeMillis())
.packageName(packageName)
.fileDigest(getPackageFileDigest())
.signatureDigest(getPackageSignatures())
.gmsVersionCode(Constants.MAX_REFERENCE_VERSION)
.googleCn(false)
.seLinuxState(new SELinuxState(true, true))
.suCandidates(Collections.<FileState>emptyList())
.build();
AttestRequest request = new AttestRequest(ByteString.of(payload.toByteArray()), "");
Log.d(TAG, "attest: " + payload);
try {
try {
AttestResponse response = attest(request);
callbacks.onAttestationData(Status.SUCCESS, new AttestationData(response.result));
attestation.buildPayload(nonce);
RemoteDroidGuardConnector conn = new RemoteDroidGuardConnector(context);
Bundle bundle = new Bundle();
bundle.putString("contentBinding", attestation.getPayloadHashBase64());
RemoteDroidGuardConnector.Result dg = conn.guard("attest", Long.toString(LastCheckinInfo.read(context).androidId),
bundle, Utils.getDeviceIdentifier(context).meid, Utils.getPhoneInfo(context).imsi);
if (dg != null && dg.getStatusCode() == 0 && dg.getResult() != null) {
attestation.setDroidGaurdResult(Base64.encodeToString(dg.getResult(), Base64.NO_WRAP + Base64.NO_PADDING + Base64.URL_SAFE));
AttestationData data = new AttestationData(attestation.attest());
callbacks.onAttestationData(Status.SUCCESS, data);
} else {
callbacks.onAttestationData(dg == null ? Status.INTERNAL_ERROR : new Status(dg.getStatusCode()), null);
}
} catch (IOException e) {
Log.w(TAG, e);
callbacks.onAttestationData(Status.INTERNAL_ERROR, null);
@ -143,53 +85,6 @@ public class SafetyNetClientServiceImpl extends ISafetyNetService.Stub {
}).start();
}
private AttestResponse attest(AttestRequest request) throws IOException {
HttpURLConnection connection = (HttpURLConnection) new URL(ATTEST_URL).openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestProperty("Content-type", "application/x-protobuf");
connection.setRequestProperty("Content-Encoding", "gzip");
connection.setRequestProperty("Accept-Encoding", "gzip");
connection.setRequestProperty("User-Agent", "SafetyNet/" + Constants.MAX_REFERENCE_VERSION);
Log.d(TAG, "-- Request --\n" + request);
OutputStream os = new GZIPOutputStream(connection.getOutputStream());
os.write(request.toByteArray());
os.close();
if (connection.getResponseCode() != 200) {
byte[] bytes = null;
String ex = null;
try {
bytes = Utils.readStreamToEnd(connection.getErrorStream());
ex = new String(Utils.readStreamToEnd(new GZIPInputStream(new ByteArrayInputStream(bytes))));
} catch (Exception e) {
if (bytes != null) {
throw new IOException(getBytesAsString(bytes), e);
}
throw new IOException(connection.getResponseMessage(), e);
}
throw new IOException(ex);
}
InputStream is = connection.getInputStream();
AttestResponse response = new Wire().parseFrom(new GZIPInputStream(is), AttestResponse.class);
is.close();
return response;
}
private String getBytesAsString(byte[] bytes) {
if (bytes == null) return "null";
try {
CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
CharBuffer r = d.decode(ByteBuffer.wrap(bytes));
return r.toString();
} catch (Exception e) {
return Base64.encodeToString(bytes, Base64.NO_WRAP);
}
}
@Override
public void getSharedUuid(ISafetyNetCallbacks callbacks) throws RemoteException {
PackageUtils.checkPackageUid(context, packageName, getCallingUid());

1
remote-droid-guard-lib Symbolic link
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@ -0,0 +1 @@
extern/RemoteDroidGuard/remote-droid-guard-lib

2
settings.gradle
View File

@ -27,3 +27,5 @@ include ':vtm-android'
include ':vtm-extras'
include ':vtm-jts'
include ':vtm-themes'
include ':remote-droid-guard-lib'