Merge "FRP: Add migration for upgrading from a version without FRP credential" into oc-mr1-dev (ee5e0217) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/locksettings/LockSettingsService.java

+80 −8

Original line number	Diff line number	Diff line
		@@ -192,6 +192,14 @@ public class LockSettingsService extends ILockSettings.Stub {
		publishBinderService("lock_settings", mLockSettingsService);
		}

		@Override
		public void onBootPhase(int phase) {
		super.onBootPhase(phase);
		if (phase == PHASE_ACTIVITY_MANAGER_READY) {
		mLockSettingsService.migrateOldDataAfterSystemReady();
		}
		}

		@Override
		public void onStartUser(int userHandle) {
		mLockSettingsService.onStartUser(userHandle);
		@@ -722,6 +730,73 @@ public class LockSettingsService extends ILockSettings.Stub {
		}
		}

		private void migrateOldDataAfterSystemReady() {
		try {
		// Migrate the FRP credential to the persistent data block
		if (LockPatternUtils.frpCredentialEnabled() && !getBoolean("migrated_frp", false, 0)) {
		migrateFrpCredential();
		setBoolean("migrated_frp", true, 0);
		Slog.i(TAG, "Migrated migrated_frp.");
		}
		} catch (RemoteException e) {
		Slog.e(TAG, "Unable to migrateOldDataAfterSystemReady", e);
		}
		}

		/**
		* Migrate the credential for the FRP credential owner user if the following are satisfied:
		* - the user has a secure credential
		* - the FRP credential is not set up
		* - the credential is based on a synthetic password.
		*/
		private void migrateFrpCredential() throws RemoteException {
		if (mStorage.readPersistentDataBlock() != PersistentData.NONE) {
		return;
		}
		for (UserInfo userInfo : mUserManager.getUsers()) {
		if (userOwnsFrpCredential(userInfo) && isUserSecure(userInfo.id)) {
		synchronized (mSpManager) {
		if (isSyntheticPasswordBasedCredentialLocked(userInfo.id)) {
		int actualQuality = (int) getLong(LockPatternUtils.PASSWORD_TYPE_KEY,
		DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userInfo.id);

		mSpManager.migrateFrpPasswordLocked(
		getSyntheticPasswordHandleLocked(userInfo.id),
		userInfo,
		redactActualQualityToMostLenientEquivalentQuality(actualQuality));
		}
		}
		return;
		}
		}
		}

		/**
		* Returns the lowest password quality that still presents the same UI for entering it.
		*
		* For the FRP credential, we do not want to leak the actual quality of the password, only what
		* kind of UI it requires. However, when migrating, we only know the actual quality, not the
		* originally requested quality; since this is only used to determine what input variant to
		* present to the user, we just assume the lowest possible quality was requested.
		*/
		private int redactActualQualityToMostLenientEquivalentQuality(int quality) {
		switch (quality) {
		case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
		case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
		case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
		return DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC;
		case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
		case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
		return DevicePolicyManager.PASSWORD_QUALITY_NUMERIC;
		case DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED:
		case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
		case DevicePolicyManager.PASSWORD_QUALITY_MANAGED:
		case DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK:
		default:
		return quality;
		}
		}

		private final void checkWritePermission(int userId) {
		mContext.enforceCallingOrSelfPermission(PERMISSION, "LockSettingsWrite");
		}
		@@ -805,7 +880,7 @@ public class LockSettingsService extends ILockSettings.Stub {
		}

		@Override
		public boolean getBoolean(String key, boolean defaultValue, int userId) throws RemoteException {
		public boolean getBoolean(String key, boolean defaultValue, int userId) {
		checkReadPermission(key, userId);
		String value = getStringUnchecked(key, null, userId);
		return TextUtils.isEmpty(value) ?
		@@ -813,14 +888,14 @@ public class LockSettingsService extends ILockSettings.Stub {
		}

		@Override
		public long getLong(String key, long defaultValue, int userId) throws RemoteException {
		public long getLong(String key, long defaultValue, int userId) {
		checkReadPermission(key, userId);
		String value = getStringUnchecked(key, null, userId);
		return TextUtils.isEmpty(value) ? defaultValue : Long.parseLong(value);
		}

		@Override
		public String getString(String key, String defaultValue, int userId) throws RemoteException {
		public String getString(String key, String defaultValue, int userId) {
		checkReadPermission(key, userId);
		return getStringUnchecked(key, defaultValue, userId);
		}
		@@ -1926,11 +2001,8 @@ public class LockSettingsService extends ILockSettings.Stub {
		}

		private long getSyntheticPasswordHandleLocked(int userId) {
		try {
		return getLong(SYNTHETIC_PASSWORD_HANDLE_KEY, 0, userId);
		} catch (RemoteException e) {
		return SyntheticPasswordManager.DEFAULT_HANDLE;
		}
		return getLong(SYNTHETIC_PASSWORD_HANDLE_KEY,
		SyntheticPasswordManager.DEFAULT_HANDLE, userId);
		}

		private boolean isSyntheticPasswordBasedCredentialLocked(int userId) throws RemoteException {

services/core/java/com/android/server/locksettings/SyntheticPasswordManager.java

+17 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package com.android.server.locksettings;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.app.admin.DevicePolicyManager;
		import android.content.pm.UserInfo;
		import android.hardware.weaver.V1_0.IWeaver;
		import android.hardware.weaver.V1_0.WeaverConfig;
		import android.hardware.weaver.V1_0.WeaverReadResponse;
		@@ -642,6 +643,22 @@ public class SyntheticPasswordManager {
		}


		public void migrateFrpPasswordLocked(long handle, UserInfo userInfo, int requestedQuality) {
		if (mStorage.getPersistentDataBlock() != null
		&& LockPatternUtils.userOwnsFrpCredential(userInfo)) {
		PasswordData pwd = PasswordData.fromBytes(loadState(PASSWORD_DATA_NAME, handle,
		userInfo.id));
		if (pwd.passwordType != LockPatternUtils.CREDENTIAL_TYPE_NONE) {
		int weaverSlot = loadWeaverSlot(handle, userInfo.id);
		if (weaverSlot != INVALID_WEAVER_SLOT) {
		synchronizeWeaverFrpPassword(pwd, requestedQuality, userInfo.id, weaverSlot);
		} else {
		synchronizeFrpPassword(pwd, requestedQuality, userInfo.id);
		}
		}
		}
		}

		private void synchronizeFrpPassword(PasswordData pwd,
		int requestedQuality, int userId) {
		if (mStorage.getPersistentDataBlock() != null