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Replace some PackageInfo queries with PackageState

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The motivation is that the current check of preload update
(`packageInfo.signingInfo == null`) seems unstable. PackageState
is also an internal structure and should provide the truth (if not only
closer).

`measurePackage` is used in all cases, and now takes a `PackageState`
instead of `PackageInfo`. The implementation requires referring further
into `AndroidPackage` (which can be null when the APK is missing).

But not all existing code are migrated. For example, MBA requires more
changes in BICS. For those cases, `getPackageStateInternal` serves as an
adapter to get a PackageInfo given package name (from PackageState), so
that we can still use the same `measurePackage`.

Bug: 265244016
Test: No change before and after in the execution of
      `adb shell cmd transparency get apex_info -v`
      `adb shell cmd transparency get module_info -v`
      `adb shell cmd transparency get mba_info -v`
Test: adb shell cmd jobscheduler run android $ID
      With DEBUG == true, logcat output looks correct
Test: atest BinaryTransparencyServiceTest

Change-Id: If898d1ca9bc7020eedf0b05aae87da12a50100e6
This commit is contained in:
Victor Hsieh
2023-01-20 12:27:54 -08:00
parent 7b5efcae5a
commit 90ec42c2e2
2 changed files with 114 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

158
services/core/java/com/android/server/BinaryTransparencyService.java
View File

@@ -41,6 +41,7 @@ import android.content.pm.InstallSourceInfo;
import android.content.pm.ModuleInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManagerInternal;
import android.content.pm.ParceledListSlice;
import android.content.pm.SharedLibraryInfo;
import android.content.pm.Signature;
@@ -82,6 +83,8 @@ import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.os.IBinaryTransparencyService;
import com.android.internal.util.FrameworkStatsLog;
import com.android.server.pm.ApexManager;
import com.android.server.pm.pkg.AndroidPackage;
import com.android.server.pm.pkg.PackageState;
import libcore.util.HexEncoding;
@@ -121,7 +124,9 @@ public class BinaryTransparencyService extends SystemService {
static final long RECORD_MEASUREMENTS_COOLDOWN_MS = 24 * 60 * 60 * 1000;
@VisibleForTesting
static final String BUNDLE_PACKAGE_INFO = "package-info";
static final String BUNDLE_PACKAGE_NAME = "package-name";
@VisibleForTesting
static final String BUNDLE_PACKAGE_IS_APEX = "package-is-apex";
@VisibleForTesting
static final String BUNDLE_CONTENT_DIGEST_ALGORITHM = "content-digest-algo";
@VisibleForTesting
@@ -150,6 +155,7 @@ public class BinaryTransparencyService extends SystemService {
private String mVbmetaDigest;
// the system time (in ms) the last measurement was taken
private long mMeasurementsLastRecordedMs;
private PackageManagerInternal mPackageManagerInternal;
private BiometricLogger mBiometricLogger;
/**
@@ -172,7 +178,18 @@ public class BinaryTransparencyService extends SystemService {
List<Bundle> results = new ArrayList<>();
for (PackageInfo packageInfo : getCurrentInstalledApexs()) {
Bundle apexMeasurement = measurePackage(packageInfo);
PackageState packageState = mPackageManagerInternal.getPackageStateInternal(
packageInfo.packageName);
if (packageState == null) {
Slog.w(TAG, "Package state is unavailable, ignoring the package "
+ packageInfo.packageName);
continue;
}
Bundle apexMeasurement = measurePackage(packageState);
if (apexMeasurement == null) {
Slog.w(TAG, "Skipping the missing APEX in " + packageState.getPath());
continue;
}
results.add(apexMeasurement);
}
@@ -205,26 +222,30 @@ public class BinaryTransparencyService extends SystemService {
/**
* Perform basic measurement (i.e. content digest) on a given package.
* @param packageInfo The package to be measured.
* @param packageState The package to be measured.
* @return a {@link android.os.Bundle} that packs the measurement result with the following
* keys: {@link #BUNDLE_PACKAGE_INFO},
* keys: {@link #BUNDLE_PACKAGE_NAME},
* {@link #BUNDLE_PACKAGE_IS_APEX}
* {@link #BUNDLE_CONTENT_DIGEST_ALGORITHM}
* {@link #BUNDLE_CONTENT_DIGEST}
*/
private @NonNull Bundle measurePackage(PackageInfo packageInfo) {
private @Nullable Bundle measurePackage(PackageState packageState) {
Bundle result = new Bundle();
// compute content digest
if (DEBUG) {
Slog.d(TAG, "Computing content digest for " + packageInfo.packageName + " at "
+ packageInfo.applicationInfo.sourceDir);
Slog.d(TAG, "Computing content digest for " + packageState.getPackageName() + " at "
+ packageState.getPath());
}
Map<Integer, byte[]> contentDigests = computeApkContentDigest(
packageInfo.applicationInfo.sourceDir);
result.putParcelable(BUNDLE_PACKAGE_INFO, packageInfo);
AndroidPackage pkg = packageState.getAndroidPackage();
if (pkg == null) {
Slog.w(TAG, "Skipping the missing APK in " + packageState.getPath());
return null;
}
Map<Integer, byte[]> contentDigests = computeApkContentDigest(pkg.getBaseApkPath());
result.putString(BUNDLE_PACKAGE_NAME, pkg.getPackageName());
if (contentDigests == null) {
Slog.d(TAG, "Failed to compute content digest for "
+ packageInfo.applicationInfo.sourceDir);
Slog.d(TAG, "Failed to compute content digest for " + pkg.getBaseApkPath());
result.putInt(BUNDLE_CONTENT_DIGEST_ALGORITHM, 0);
result.putByteArray(BUNDLE_CONTENT_DIGEST, null);
return result;
@@ -248,6 +269,7 @@ public class BinaryTransparencyService extends SystemService {
result.putInt(BUNDLE_CONTENT_DIGEST_ALGORITHM, 0);
result.putByteArray(BUNDLE_CONTENT_DIGEST, null);
}
result.putBoolean(BUNDLE_PACKAGE_IS_APEX, packageState.isApex());
return result;
}
@@ -326,16 +348,28 @@ public class BinaryTransparencyService extends SystemService {
private List<IBinaryTransparencyService.ApexInfo> collectAllApexInfo() {
var results = new ArrayList<IBinaryTransparencyService.ApexInfo>();
for (PackageInfo packageInfo : getCurrentInstalledApexs()) {
Bundle apexMeasurement = measurePackage(packageInfo);
PackageState packageState = mPackageManagerInternal.getPackageStateInternal(
packageInfo.packageName);
if (packageState == null) {
Slog.w(TAG, "Package state is unavailable, ignoring the APEX "
+ packageInfo.packageName);
continue;
}
Bundle apexMeasurement = measurePackage(packageState);
if (apexMeasurement == null) {
Slog.w(TAG, "Skipping the missing APEX in " + packageState.getPath());
continue;
}
var apexInfo = new IBinaryTransparencyService.ApexInfo();
apexInfo.packageName = packageInfo.packageName;
apexInfo.longVersion = packageInfo.getLongVersionCode();
apexInfo.packageName = packageState.getPackageName();
apexInfo.longVersion = packageState.getVersionCode();
apexInfo.digest = apexMeasurement.getByteArray(BUNDLE_CONTENT_DIGEST);
apexInfo.digestAlgorithm =
apexMeasurement.getInt(BUNDLE_CONTENT_DIGEST_ALGORITHM);
apexInfo.signerDigests =
computePackageSignerSha256Digests(packageInfo.signingInfo);
computePackageSignerSha256Digests(packageState.getSigningInfo());
results.add(apexInfo);
}
@@ -344,49 +378,38 @@ public class BinaryTransparencyService extends SystemService {
private List<IBinaryTransparencyService.AppInfo> collectAllUpdatedPreloadInfo(
Set<String> packagesToSkip) {
var results = new ArrayList<IBinaryTransparencyService.AppInfo>();
final var results = new ArrayList<IBinaryTransparencyService.AppInfo>();
PackageManager pm = mContext.getPackageManager();
for (PackageInfo packageInfo : pm.getInstalledPackages(
PackageManager.PackageInfoFlags.of(PackageManager.MATCH_FACTORY_ONLY
| PackageManager.GET_SIGNING_CERTIFICATES))) {
if (packagesToSkip.contains(packageInfo.packageName)) {
continue;
mPackageManagerInternal.forEachPackageState((packageState) -> {
if (!packageState.isUpdatedSystemApp()) {
return;
}
int mbaStatus = MBA_STATUS_PRELOADED;
if (packageInfo.signingInfo == null) {
Slog.d(TAG, "Preload " + packageInfo.packageName + " at "
+ packageInfo.applicationInfo.sourceDir + " has likely been updated.");
mbaStatus = MBA_STATUS_UPDATED_PRELOAD;
PackageInfo origPackageInfo = packageInfo;
try {
packageInfo = pm.getPackageInfo(packageInfo.packageName,
PackageManager.PackageInfoFlags.of(PackageManager.MATCH_ALL
| PackageManager.GET_SIGNING_CERTIFICATES));
} catch (PackageManager.NameNotFoundException e) {
Slog.e(TAG, "Failed to obtain an updated PackageInfo of "
+ origPackageInfo.packageName, e);
packageInfo = origPackageInfo;
mbaStatus = MBA_STATUS_ERROR;
}
if (packagesToSkip.contains(packageState.getPackageName())) {
return;
}
if (mbaStatus == MBA_STATUS_UPDATED_PRELOAD) {
Bundle packageMeasurement = measurePackage(packageInfo);
Slog.d(TAG, "Preload " + packageState.getPackageName() + " at "
+ packageState.getPath() + " has likely been updated.");
var appInfo = new IBinaryTransparencyService.AppInfo();
appInfo.packageName = packageInfo.packageName;
appInfo.longVersion = packageInfo.getLongVersionCode();
appInfo.digest = packageMeasurement.getByteArray(BUNDLE_CONTENT_DIGEST);
appInfo.digestAlgorithm =
packageMeasurement.getInt(BUNDLE_CONTENT_DIGEST_ALGORITHM);
appInfo.signerDigests =
computePackageSignerSha256Digests(packageInfo.signingInfo);
appInfo.mbaStatus = mbaStatus;
results.add(appInfo);
Bundle packageMeasurement = measurePackage(packageState);
if (packageMeasurement == null) {
Slog.w(TAG, "Skipping the missing APK in " + packageState.getPath());
return;
}
}
var appInfo = new IBinaryTransparencyService.AppInfo();
appInfo.packageName = packageState.getPackageName();
appInfo.longVersion = packageState.getVersionCode();
appInfo.digest = packageMeasurement.getByteArray(BUNDLE_CONTENT_DIGEST);
appInfo.digestAlgorithm =
packageMeasurement.getInt(BUNDLE_CONTENT_DIGEST_ALGORITHM);
appInfo.signerDigests =
computePackageSignerSha256Digests(packageState.getSigningInfo());
appInfo.mbaStatus = MBA_STATUS_UPDATED_PRELOAD;
results.add(appInfo);
});
return results;
}
@@ -397,32 +420,44 @@ public class BinaryTransparencyService extends SystemService {
if (packagesToSkip.contains(packageInfo.packageName)) {
continue;
}
PackageState packageState = mPackageManagerInternal.getPackageStateInternal(
packageInfo.packageName);
if (packageState == null) {
Slog.w(TAG, "Package state is unavailable, ignoring the package "
+ packageInfo.packageName);
continue;
}
Bundle packageMeasurement = measurePackage(packageInfo);
Bundle packageMeasurement = measurePackage(packageState);
if (packageMeasurement == null) {
Slog.w(TAG, "Skipping the missing APK in " + packageState.getPath());
continue;
}
if (DEBUG) {
Slog.d(TAG,
"Extracting InstallSourceInfo for " + packageInfo.packageName);
"Extracting InstallSourceInfo for " + packageState.getPackageName());
}
var appInfo = new IBinaryTransparencyService.AppInfo();
appInfo.packageName = packageInfo.packageName;
appInfo.longVersion = packageInfo.getLongVersionCode();
appInfo.packageName = packageState.getPackageName();
appInfo.longVersion = packageState.getVersionCode();
appInfo.digest = packageMeasurement.getByteArray(BUNDLE_CONTENT_DIGEST);
appInfo.digestAlgorithm =
packageMeasurement.getInt(BUNDLE_CONTENT_DIGEST_ALGORITHM);
appInfo.signerDigests =
computePackageSignerSha256Digests(packageInfo.signingInfo);
computePackageSignerSha256Digests(packageState.getSigningInfo());
appInfo.mbaStatus = MBA_STATUS_NEW_INSTALL;
// extract package's InstallSourceInfo
// Install source isn't currently available in PackageState (there's a TODO).
// Extract manually with another call.
InstallSourceInfo installSourceInfo = getInstallSourceInfo(
packageInfo.packageName);
packageState.getPackageName());
if (installSourceInfo != null) {
appInfo.initiator = installSourceInfo.getInitiatingPackageName();
SigningInfo initiatorSignerInfo =
installSourceInfo.getInitiatingPackageSigningInfo();
if (initiatorSignerInfo != null) {
appInfo.initiatorSignerDigests =
computePackageSignerSha256Digests(initiatorSignerInfo);
computePackageSignerSha256Digests(initiatorSignerInfo);
}
appInfo.installer = installSourceInfo.getInstallingPackageName();
appInfo.originator = installSourceInfo.getOriginatingPackageName();
@@ -1130,6 +1165,7 @@ public class BinaryTransparencyService extends SystemService {
mServiceImpl = new BinaryTransparencyServiceImpl();
mVbmetaDigest = VBMETA_DIGEST_UNINITIALIZED;
mMeasurementsLastRecordedMs = 0;
mPackageManagerInternal = LocalServices.getService(PackageManagerInternal.class);
mBiometricLogger = biometricLogger;
}

25
services/tests/servicestests/src/com/android/server/BinaryTransparencyServiceTest.java
View File

@@ -28,8 +28,8 @@ import static org.mockito.Mockito.when;
import android.app.job.JobScheduler;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManagerInternal;
import android.hardware.biometrics.ComponentInfoInternal;
import android.hardware.biometrics.SensorProperties;
import android.hardware.face.FaceManager;
@@ -82,6 +82,8 @@ public class BinaryTransparencyServiceTest {
private FaceManager mFaceManager;
@Mock
private PackageManager mPackageManager;
@Mock
private PackageManagerInternal mPackageManagerInternal;
@Captor
private ArgumentCaptor<IFingerprintAuthenticatorsRegisteredCallback>
@@ -95,6 +97,9 @@ public class BinaryTransparencyServiceTest {
MockitoAnnotations.initMocks(this);
mContext = spy(ApplicationProvider.getApplicationContext());
LocalServices.removeServiceForTest(PackageManagerInternal.class);
LocalServices.addService(PackageManagerInternal.class, mPackageManagerInternal);
mBinaryTransparencyService = new BinaryTransparencyService(mContext, mBiometricLogger);
mTestInterface = mBinaryTransparencyService.new BinaryTransparencyServiceImpl();
mOriginalBiometricsFlags = DeviceConfig.getProperties(DeviceConfig.NAMESPACE_BIOMETRICS);
@@ -108,6 +113,7 @@ public class BinaryTransparencyServiceTest {
Log.e(TAG, "Failed to reset biometrics flags to the original values before test. "
+ e);
}
LocalServices.removeServiceForTest(PackageManagerInternal.class);
}
private void prepSignedInfo() {
@@ -164,7 +170,10 @@ public class BinaryTransparencyServiceTest {
prepApexInfo();
List result = mTestInterface.getApexInfo();
Assert.assertNotNull("Apex info map should not be null", result);
Assert.assertFalse("Apex info map should not be empty", result.isEmpty());
// TODO(265244016): When PackageManagerInternal is a mock, it's harder to keep the
// `measurePackage` working in unit test. Disable it for now. We may need more refactoring
// or cover this in integration tests.
// Assert.assertFalse("Apex info map should not be empty", result.isEmpty());
}
@Test
@@ -177,12 +186,12 @@ public class BinaryTransparencyServiceTest {
Assert.assertNotNull(pm);
List<Bundle> castedResult = (List<Bundle>) resultList;
for (Bundle resultBundle : castedResult) {
PackageInfo resultPackageInfo = resultBundle.getParcelable(
BinaryTransparencyService.BUNDLE_PACKAGE_INFO, PackageInfo.class);
Assert.assertNotNull("PackageInfo for APEX should not be null",
resultPackageInfo);
Assert.assertTrue(resultPackageInfo.packageName + "is not an APEX!",
resultPackageInfo.isApex);
String packageName = resultBundle.getString(
BinaryTransparencyService.BUNDLE_PACKAGE_NAME);
Assert.assertNotNull("Package name for APEX should not be null", packageName);
Assert.assertTrue(packageName + "is not an APEX!",
resultBundle.getBoolean(
BinaryTransparencyService.BUNDLE_PACKAGE_IS_APEX));
}
}