PawletOS/app_Settings
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add RemoteLockscreenValidationFragment to help retain remote lockscreen

Browse Source 
validation state.

Currently, if ConfirmDeviceCredentialBaseFragment is ever re-created due
to orientation change, screen getting turned off, etc., relevant state
gets lost. This led to the old ConfirmDeviceCredentialBaseFragment
handling results which led to issues such as lockscreen not getting set.
By addiing a retained RemoteLockscreenValidationFragment,
we're able to update the new ConfirmDeviceCredentialBaseFragment
that will handle results. We can also retain other important state like
the device credential guess to be set after successful validation.

Some smaller changes include:
* If the activity is finished for any reason other than "Back" getting
  pressed, RESULT_FIRST_USER is returned instead of RESULT_CANCELED.
* CheckBox, "Forgot [LSKF]?" button, and EditText/LockPatternView
  gets disabled during validation.
* The above also stay disabled if ConfirmDeviceCredentialBaseFragment
  gets re-created and remote lockscreen validation is still in progress.

Test: m RunSettingsRoboTests -j
ROBOTEST_FILTER=com.android.settings.password
Test: Manual
Bug: 274983372
Bug: 274991889
Bug: 274792310
Bug: 270395807

Change-Id: Ib6d47430e233a43e6985ab83abae45713c49771f
This commit is contained in:
Brian Lee
2023-03-31 14:23:58 -07:00
parent be16edbe06
commit 2eb8ed2488
6 changed files with 314 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
src/com/android/settings/password/ConfirmDeviceCredentialBaseFragment.java
View File

@@ -17,6 +17,7 @@
// TODO (b/35202196): move this class out of the root of the package.
package com.android.settings.password;
import static android.app.Activity.RESULT_FIRST_USER;
import static android.app.admin.DevicePolicyResources.Strings.Settings.WORK_PROFILE_LOCK_ATTEMPTS_FAILED;
import static com.android.settings.Utils.SETTINGS_PACKAGE_NAME;
@@ -24,7 +25,6 @@ import static com.android.settings.Utils.SETTINGS_PACKAGE_NAME;
import android.annotation.Nullable;
import android.app.Dialog;
import android.app.KeyguardManager;
import android.app.RemoteLockscreenValidationResult;
import android.app.RemoteLockscreenValidationSession;
import android.app.admin.DevicePolicyManager;
import android.app.admin.ManagedSubscriptionsPolicy;
@@ -38,7 +38,6 @@ import android.os.Bundle;
import android.os.Handler;
import android.os.UserHandle;
import android.os.UserManager;
import android.service.remotelockscreenvalidation.IRemoteLockscreenValidationCallback;
import android.service.remotelockscreenvalidation.RemoteLockscreenValidationClient;
import android.telecom.TelecomManager;
import android.text.TextUtils;
@@ -55,14 +54,11 @@ import androidx.fragment.app.FragmentManager;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.LockscreenCredential;
import com.android.security.SecureBox;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.core.InstrumentedFragment;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import com.google.android.setupdesign.GlifLayout;
/**
* Base fragment to be shared for PIN/Pattern/Password confirmation fragments.
@@ -89,9 +85,13 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
/** Time we wait before clearing a wrong input attempt (e.g. pattern) and the error message. */
protected static final long CLEAR_WRONG_ATTEMPT_TIMEOUT_MS = 3000;
protected static final String FRAGMENT_TAG_REMOTE_LOCKSCREEN_VALIDATION =
"remote_lockscreen_validation";
protected boolean mReturnCredentials = false;
protected boolean mReturnGatekeeperPassword = false;
protected boolean mForceVerifyPath = false;
protected GlifLayout mGlifLayout;
protected CheckBox mCheckBox;
protected Button mCancelButton;
/** Button allowing managed profile password reset, null when is not shown. */
@@ -109,8 +109,8 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
protected BiometricManager mBiometricManager;
@Nullable protected RemoteLockscreenValidationSession mRemoteLockscreenValidationSession;
/** Credential saved so the credential can be set for device if remote validation passes */
@Nullable protected LockscreenCredential mDeviceCredentialGuess;
@Nullable protected RemoteLockscreenValidationClient mRemoteLockscreenValidationClient;
protected RemoteLockscreenValidationFragment mRemoteLockscreenValidationFragment;
private boolean isInternalActivity() {
return (getActivity() instanceof ConfirmLockPassword.InternalActivity)
@@ -136,8 +136,8 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
FeatureFlagUtils.SETTINGS_REMOTE_DEVICE_CREDENTIAL_VALIDATION)) {
mRemoteValidation = true;
} else {
Log.e(TAG, "Remote device credential validation not enabled.");
getActivity().finish();
onRemoteLockscreenValidationFailure(
"Remote lockscreen validation not enabled.");
}
}
if (mRemoteValidation) {
@@ -146,23 +146,31 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
RemoteLockscreenValidationSession.class);
if (mRemoteLockscreenValidationSession == null
|| mRemoteLockscreenValidationSession.getRemainingAttempts() == 0) {
Log.e(TAG, "RemoteLockscreenValidationSession is null or "
onRemoteLockscreenValidationFailure("RemoteLockscreenValidationSession is null or "
+ "no more attempts for remote lockscreen validation.");
getActivity().finish();
}
ComponentName remoteLockscreenValidationServiceComponent =
intent.getParcelableExtra(Intent.EXTRA_COMPONENT_NAME, ComponentName.class);
if (remoteLockscreenValidationServiceComponent == null) {
Log.e(TAG, "RemoteLockscreenValidationService ComponentName is null");
getActivity().finish();
onRemoteLockscreenValidationFailure(
"RemoteLockscreenValidationService ComponentName is null");
}
mRemoteLockscreenValidationClient = RemoteLockscreenValidationClient
.create(getContext(), remoteLockscreenValidationServiceComponent);
if (!mRemoteLockscreenValidationClient.isServiceAvailable()) {
Log.e(TAG, String.format("RemoteLockscreenValidationService at %s is not available",
onRemoteLockscreenValidationFailure(String.format(
"RemoteLockscreenValidationService at %s is not available",
remoteLockscreenValidationServiceComponent.getClassName()));
getActivity().finish();
}
mRemoteLockscreenValidationFragment =
(RemoteLockscreenValidationFragment) getFragmentManager()
.findFragmentByTag(FRAGMENT_TAG_REMOTE_LOCKSCREEN_VALIDATION);
if (mRemoteLockscreenValidationFragment == null) {
mRemoteLockscreenValidationFragment = new RemoteLockscreenValidationFragment();
getFragmentManager().beginTransaction().add(mRemoteLockscreenValidationFragment,
FRAGMENT_TAG_REMOTE_LOCKSCREEN_VALIDATION).commit();
}
}
@@ -194,8 +202,10 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
mCancelButton.setOnClickListener(v -> {
if (hasAlternateButton) {
getActivity().setResult(KeyguardManager.RESULT_ALTERNATE);
}
getActivity().finish();
} else if (mRemoteValidation) {
onRemoteLockscreenValidationFailure("Forgot lockscreen credential button pressed.");
}
});
setupForgotButtonIfManagedProfile(view);
@@ -299,17 +309,11 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
if (mRemoteLockscreenValidationClient != null) {
mRemoteLockscreenValidationClient.disconnect();
}
if (mDeviceCredentialGuess != null) {
mDeviceCredentialGuess.zeroize();
}
super.onDestroy();
}
protected abstract void authenticationSucceeded();
protected abstract void onRemoteDeviceCredentialValidationResult(
RemoteLockscreenValidationResult result);
public void prepareEnterAnimation() {
}
@@ -411,43 +415,33 @@ public abstract class ConfirmDeviceCredentialBaseFragment extends InstrumentedFr
}
protected void validateGuess(LockscreenCredential credentialGuess) {
if (mCheckBox.isChecked()) {
// Keep credential in memory since user wants to set guess as screen lock.
mDeviceCredentialGuess = credentialGuess;
} else if (mDeviceCredentialGuess != null) {
mDeviceCredentialGuess.zeroize();
mRemoteLockscreenValidationFragment.validateLockscreenGuess(
mRemoteLockscreenValidationClient, credentialGuess,
mRemoteLockscreenValidationSession.getSourcePublicKey(), mCheckBox.isChecked());
}
mRemoteLockscreenValidationClient.validateLockscreenGuess(
encryptDeviceCredentialGuess(credentialGuess.getCredential()),
new IRemoteLockscreenValidationCallback.Stub() {
@Override
public void onSuccess(RemoteLockscreenValidationResult result) {
mHandler.post(()->onRemoteDeviceCredentialValidationResult(result));
protected void updateRemoteLockscreenValidationViews() {
if (!mRemoteValidation || mRemoteLockscreenValidationFragment == null) {
return;
}
@Override
public void onFailure(String message) {
Log.e(TAG, "A failure occurred while trying "
+ "to validate lockscreen guess: " + message);
mHandler.post(()->getActivity().finish());
}
});
boolean enable = mRemoteLockscreenValidationFragment.isRemoteValidationInProgress();
mGlifLayout.setProgressBarShown(enable);
mCheckBox.setEnabled(!enable);
mCancelButton.setEnabled(!enable);
}
private byte[] encryptDeviceCredentialGuess(byte[] guess) {
try {
byte[] encodedPublicKey = mRemoteLockscreenValidationSession.getSourcePublicKey();
PublicKey publicKey = SecureBox.decodePublicKey(encodedPublicKey);
return SecureBox.encrypt(
publicKey,
/* sharedSecret= */ null,
LockPatternUtils.ENCRYPTED_REMOTE_CREDENTIALS_HEADER,
guess);
} catch (NoSuchAlgorithmException | InvalidKeyException e) {
Log.w(TAG, "Error encrypting device credential guess. Returning empty byte[].", e);
return new byte[0];
/**
* Finishes the activity with result code {@link android.app.Activity#RESULT_FIRST_USER}
* after logging the error message.
* @param message Optional message to log.
*/
public void onRemoteLockscreenValidationFailure(String message) {
if (!TextUtils.isEmpty(message)) {
Log.w(TAG, message);
}
getActivity().setResult(RESULT_FIRST_USER);
getActivity().finish();
}
protected abstract void onShowError();

67
src/com/android/settings/password/ConfirmLockPassword.java
View File

@@ -71,8 +71,6 @@ import com.android.settings.R;
import com.android.settingslib.animation.AppearAnimationUtils;
import com.android.settingslib.animation.DisappearAnimationUtils;
import com.google.android.setupdesign.GlifLayout;
import java.util.ArrayList;
public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
@@ -127,7 +125,8 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
public static class ConfirmLockPasswordFragment extends ConfirmDeviceCredentialBaseFragment
implements OnClickListener, OnEditorActionListener,
CredentialCheckResultTracker.Listener, SaveChosenLockWorkerBase.Listener {
CredentialCheckResultTracker.Listener, SaveChosenLockWorkerBase.Listener,
RemoteLockscreenValidationFragment.Listener {
private static final String FRAGMENT_TAG_CHECK_LOCK_RESULT = "check_lock_result";
private ImeAwareEditText mPasswordEntry;
private TextViewInputDisabler mPasswordEntryInputDisabler;
@@ -140,7 +139,6 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
private AppearAnimationUtils mAppearAnimationUtils;
private DisappearAnimationUtils mDisappearAnimationUtils;
private boolean mIsManagedProfile;
private GlifLayout mGlifLayout;
private CharSequence mCheckBoxLabel;
// required constructor for fragments
@@ -255,6 +253,7 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
? R.string.lockpassword_forgot_password
: R.string.lockpassword_forgot_pin);
}
updateRemoteLockscreenValidationViews();
}
if (mForgotButton != null) {
@@ -405,6 +404,9 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
mCountdownTimer = null;
}
mCredentialCheckResultTracker.setListener(null);
if (mRemoteLockscreenValidationFragment != null) {
mRemoteLockscreenValidationFragment.setListener(null, /* handler= */ null);
}
}
@Override
@@ -426,6 +428,9 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
mLockPatternUtils.getCurrentFailedPasswordAttempts(mEffectiveUserId));
}
mCredentialCheckResultTracker.setListener(this);
if (mRemoteLockscreenValidationFragment != null) {
mRemoteLockscreenValidationFragment.setListener(this, mHandler);
}
}
@Override
@@ -436,13 +441,17 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
private void updatePasswordEntry() {
final boolean isLockedOut =
mLockPatternUtils.getLockoutAttemptDeadline(mEffectiveUserId) != 0;
mPasswordEntry.setEnabled(!isLockedOut);
mPasswordEntryInputDisabler.setInputEnabled(!isLockedOut);
if (isLockedOut) {
mImm.hideSoftInputFromWindow(mPasswordEntry.getWindowToken(), 0 /*flags*/);
} else {
final boolean isRemoteLockscreenValidationInProgress =
mRemoteLockscreenValidationFragment != null
&& mRemoteLockscreenValidationFragment.isRemoteValidationInProgress();
boolean shouldEnableInput = !isLockedOut && !isRemoteLockscreenValidationInProgress;
mPasswordEntry.setEnabled(shouldEnableInput);
mPasswordEntryInputDisabler.setInputEnabled(shouldEnableInput);
if (shouldEnableInput) {
mPasswordEntry.scheduleShowSoftInput();
mPasswordEntry.requestFocus();
} else {
mImm.hideSoftInputFromWindow(mPasswordEntry.getWindowToken(), /* flags= */0);
}
}
@@ -472,7 +481,8 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
if (mRemoteValidation) {
validateGuess(credential);
mGlifLayout.setProgressBarShown(true);
updateRemoteLockscreenValidationViews();
updatePasswordEntry();
return;
}
@@ -604,14 +614,15 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
}
@Override
protected void onRemoteDeviceCredentialValidationResult(
public void onRemoteLockscreenValidationResult(
RemoteLockscreenValidationResult result) {
switch (result.getResultCode()) {
case RemoteLockscreenValidationResult.RESULT_GUESS_VALID:
if (mCheckBox.isChecked()) {
if (mCheckBox.isChecked() && mRemoteLockscreenValidationFragment
.getLockscreenCredential() != null) {
Log.i(TAG, "Setting device screen lock to the other device's screen lock.");
ChooseLockPassword.SaveAndFinishWorker saveAndFinishWorker =
new ChooseLockPassword.SaveAndFinishWorker();
Log.i(TAG, "Setting device screen lock to the other device's screen lock.");
getFragmentManager().beginTransaction().add(saveAndFinishWorker, null)
.commit();
getFragmentManager().executePendingTransactions();
@@ -619,14 +630,14 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
saveAndFinishWorker.start(
mLockPatternUtils,
/* requestGatekeeperPassword= */ true,
mDeviceCredentialGuess,
mRemoteLockscreenValidationFragment.getLockscreenCredential(),
/* currentCredential= */ null,
mEffectiveUserId);
return;
}
} else {
mCredentialCheckResultTracker.setResult(/* matched= */ true, new Intent(),
/* timeoutMs= */ 0, mEffectiveUserId);
break;
}
return;
case RemoteLockscreenValidationResult.RESULT_GUESS_INVALID:
mCredentialCheckResultTracker.setResult(/* matched= */ false, new Intent(),
/* timeoutMs= */ 0, mEffectiveUserId);
@@ -636,12 +647,15 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
(int) result.getTimeoutMillis(), mEffectiveUserId);
break;
case RemoteLockscreenValidationResult.RESULT_NO_REMAINING_ATTEMPTS:
getActivity().finish();
break;
case RemoteLockscreenValidationResult.RESULT_SESSION_EXPIRED:
getActivity().finish();
onRemoteLockscreenValidationFailure(String.format(
"Cannot continue remote lockscreen validation. ResultCode=%d",
result.getResultCode()));
break;
}
mGlifLayout.setProgressBarShown(false);
updateRemoteLockscreenValidationViews();
updatePasswordEntry();
mRemoteLockscreenValidationFragment.clearLockscreenCredential();
}
@Override
@@ -701,21 +715,18 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
}
/**
* Callback for when the device credential guess used for remote validation was set as the
* current device's device credential.
* Callback for when the current device's lockscreen was set to the guess used for
* remote lockscreen validation.
*/
@Override
public void onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData) {
if (mDeviceCredentialGuess != null) {
mDeviceCredentialGuess.zeroize();
}
Log.i(TAG, "Device lockscreen has been set to remote device's lockscreen.");
mRemoteLockscreenValidationFragment.clearLockscreenCredential();
Intent result = new Intent();
if (mRemoteValidation && containsGatekeeperPasswordHandle(resultData)) {
result.putExtra(EXTRA_KEY_GK_PW_HANDLE, getGatekeeperPasswordHandle(resultData));
}
mGlifLayout.setProgressBarShown(false);
mCredentialCheckResultTracker.setResult(/* matched= */ true, result,
/* timeoutMs= */ 0, mEffectiveUserId);
}

51
src/com/android/settings/password/ConfirmLockPattern.java
View File

@@ -59,8 +59,6 @@ import com.android.settingslib.animation.AppearAnimationCreator;
import com.android.settingslib.animation.AppearAnimationUtils;
import com.android.settingslib.animation.DisappearAnimationUtils;
import com.google.android.setupdesign.GlifLayout;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@@ -97,7 +95,7 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
public static class ConfirmLockPatternFragment extends ConfirmDeviceCredentialBaseFragment
implements AppearAnimationCreator<Object>, CredentialCheckResultTracker.Listener,
SaveChosenLockWorkerBase.Listener {
SaveChosenLockWorkerBase.Listener, RemoteLockscreenValidationFragment.Listener {
private static final String FRAGMENT_TAG_CHECK_LOCK_RESULT = "check_lock_result";
@@ -107,7 +105,6 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
private boolean mDisappearing = false;
private CountDownTimer mCountdownTimer;
private GlifLayout mGlifLayout;
private View mSudContent;
// caller-supplied text for various prompts
@@ -239,6 +236,7 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
if (mCancelButton != null && TextUtils.isEmpty(mAlternateButtonText)) {
mCancelButton.setText(R.string.lockpassword_forgot_pattern);
}
updateRemoteLockscreenValidationViews();
}
if (mForgotButton != null) {
@@ -259,6 +257,9 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
mCountdownTimer.cancel();
}
mCredentialCheckResultTracker.setListener(null);
if (mRemoteLockscreenValidationFragment != null) {
mRemoteLockscreenValidationFragment.setListener(null, /* handler= */ null);
}
}
@Override
@@ -281,6 +282,12 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
updateStage(Stage.NeedToUnlock);
}
mCredentialCheckResultTracker.setListener(this);
if (mRemoteLockscreenValidationFragment != null) {
mRemoteLockscreenValidationFragment.setListener(this, mHandler);
if (mRemoteLockscreenValidationFragment.isRemoteValidationInProgress()) {
mLockPatternView.setEnabled(false);
}
}
}
@Override
@@ -502,7 +509,7 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
if (mRemoteValidation) {
validateGuess(credential);
mGlifLayout.setProgressBarShown(true);
updateRemoteLockscreenValidationViews();
return;
}
@@ -617,11 +624,12 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
}
@Override
protected void onRemoteDeviceCredentialValidationResult(
public void onRemoteLockscreenValidationResult(
RemoteLockscreenValidationResult result) {
switch (result.getResultCode()) {
case RemoteLockscreenValidationResult.RESULT_GUESS_VALID:
if (mCheckBox.isChecked()) {
if (mCheckBox.isChecked() && mRemoteLockscreenValidationFragment
.getLockscreenCredential() != null) {
Log.i(TAG, "Setting device screen lock to the other device's screen lock.");
ChooseLockPattern.SaveAndFinishWorker saveAndFinishWorker =
new ChooseLockPattern.SaveAndFinishWorker();
@@ -632,14 +640,14 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
saveAndFinishWorker.start(
mLockPatternUtils,
/* requestGatekeeperPassword= */ true,
mDeviceCredentialGuess,
mRemoteLockscreenValidationFragment.getLockscreenCredential(),
/* currentCredential= */ null,
mEffectiveUserId);
return;
}
} else {
mCredentialCheckResultTracker.setResult(/* matched= */ true, new Intent(),
/* timeoutMs= */ 0, mEffectiveUserId);
break;
}
return;
case RemoteLockscreenValidationResult.RESULT_GUESS_INVALID:
mCredentialCheckResultTracker.setResult(/* matched= */ false, new Intent(),
/* timeoutMs= */ 0, mEffectiveUserId);
@@ -649,12 +657,14 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
(int) result.getTimeoutMillis(), mEffectiveUserId);
break;
case RemoteLockscreenValidationResult.RESULT_NO_REMAINING_ATTEMPTS:
getActivity().finish();
break;
case RemoteLockscreenValidationResult.RESULT_SESSION_EXPIRED:
getActivity().finish();
onRemoteLockscreenValidationFailure(String.format(
"Cannot continue remote lockscreen validation. ResultCode=%d",
result.getResultCode()));
break;
}
mGlifLayout.setProgressBarShown(false);
updateRemoteLockscreenValidationViews();
mRemoteLockscreenValidationFragment.clearLockscreenCredential();
}
@Override
@@ -728,21 +738,18 @@ public class ConfirmLockPattern extends ConfirmDeviceCredentialBaseActivity {
}
/**
* Callback for when the device credential guess used for remote validation was set as the
* current device's device credential.
* Callback for when the current device's lockscreen to the guess used for
* remote lockscreen validation.
*/
@Override
public void onChosenLockSaveFinished(boolean wasSecureBefore, Intent resultData) {
if (mDeviceCredentialGuess != null) {
mDeviceCredentialGuess.zeroize();
}
Log.i(TAG, "Device lockscreen has been set to remote device's lockscreen.");
mRemoteLockscreenValidationFragment.clearLockscreenCredential();
Intent result = new Intent();
if (mRemoteValidation && containsGatekeeperPasswordHandle(resultData)) {
result.putExtra(EXTRA_KEY_GK_PW_HANDLE, getGatekeeperPasswordHandle(resultData));
}
mGlifLayout.setProgressBarShown(false);
mCredentialCheckResultTracker.setResult(/* matched= */ true, result,
/* timeoutMs= */ 0, mEffectiveUserId);
}

190
src/com/android/settings/password/RemoteLockscreenValidationFragment.java Normal file
View File

@@ -0,0 +1,190 @@
/*
* Copyright (C) 2023 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.settings.password;
import android.app.RemoteLockscreenValidationResult;
import android.os.Bundle;
import android.os.Handler;
import android.service.remotelockscreenvalidation.IRemoteLockscreenValidationCallback;
import android.service.remotelockscreenvalidation.RemoteLockscreenValidationClient;
import android.util.Log;
import androidx.fragment.app.Fragment;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.LockscreenCredential;
import com.android.security.SecureBox;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
/**
* A fragment used to hold state for remote lockscreen validation.
* If the original listener is ever re-created, the new listener must be set again using
* {@link #setListener} so that the validation result does not get handled by the old listener.
*/
public class RemoteLockscreenValidationFragment extends Fragment {
private static final String TAG = RemoteLockscreenValidationFragment.class.getSimpleName();
private Listener mListener;
private Handler mHandler;
private boolean mIsInProgress;
private RemoteLockscreenValidationResult mResult;
private String mErrorMessage;
private LockscreenCredential mLockscreenCredential;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public void onDestroy() {
clearLockscreenCredential();
if (mResult != null && mErrorMessage != null) {
Log.w(TAG, "Unprocessed remote lockscreen validation result");
}
super.onDestroy();
}
/**
* @return {@code true} if remote lockscreen guess validation has started or
* the validation result has not yet been handled.
*/
public boolean isRemoteValidationInProgress() {
return mIsInProgress;
}
/**
* Sets the listener and handler that will handle the result of remote lockscreen validation.
* Unprocessed results or failures will be handled after the listener is set.
*/
public void setListener(Listener listener, Handler handler) {
if (mListener == listener) {
return;
}
mListener = listener;
mHandler = handler;
if (mResult != null) {
handleResult();
} else if (mErrorMessage != null) {
handleFailure();
}
}
/**
* @return {@link LockscreenCredential} if it was cached in {@link #validateLockscreenGuess}.
*/
public LockscreenCredential getLockscreenCredential() {
return mLockscreenCredential;
}
/**
* Clears the {@link LockscreenCredential} if it was cached in {@link #validateLockscreenGuess}.
*/
public void clearLockscreenCredential() {
if (mLockscreenCredential != null) {
mLockscreenCredential.zeroize();
mLockscreenCredential = null;
}
}
/**
* Validates the lockscreen guess on the remote device.
* @param remoteLockscreenValidationClient the client that should be used to send the guess to
* for validation
* @param guess the {@link LockscreenCredential} guess that the user entered
* @param encryptionKey the key that should be used to encrypt the guess before validation
* @param shouldCacheGuess whether to cache to guess so it can be used to set the current
* device's lockscreen after validation succeeds.
*/
public void validateLockscreenGuess(
RemoteLockscreenValidationClient remoteLockscreenValidationClient,
LockscreenCredential guess, byte[] encryptionKey, boolean shouldCacheGuess) {
if (shouldCacheGuess) {
mLockscreenCredential = guess;
}
remoteLockscreenValidationClient.validateLockscreenGuess(
encryptDeviceCredentialGuess(guess.getCredential(), encryptionKey),
new IRemoteLockscreenValidationCallback.Stub() {
@Override
public void onSuccess(RemoteLockscreenValidationResult result) {
mResult = result;
handleResult();
}
@Override
public void onFailure(String message) {
mErrorMessage = message;
handleFailure();
}
});
mIsInProgress = true;
}
private byte[] encryptDeviceCredentialGuess(byte[] guess, byte[] encryptionKey) {
try {
PublicKey publicKey = SecureBox.decodePublicKey(encryptionKey);
return SecureBox.encrypt(
publicKey,
/* sharedSecret= */ null,
LockPatternUtils.ENCRYPTED_REMOTE_CREDENTIALS_HEADER,
guess);
} catch (NoSuchAlgorithmException | InvalidKeyException e) {
Log.w(TAG, "Error encrypting device credential guess. Returning empty byte[].", e);
return new byte[0];
}
}
private void handleResult() {
if (mHandler != null) {
mHandler.post(()-> {
if (mListener == null || mResult == null) {
return;
}
mIsInProgress = false;
mListener.onRemoteLockscreenValidationResult(mResult);
mResult = null;
});
}
}
private void handleFailure() {
if (mHandler != null) {
mHandler.post(()-> {
if (mListener == null || mErrorMessage == null) {
return;
}
mIsInProgress = false;
mListener.onRemoteLockscreenValidationFailure(
String.format("Remote lockscreen validation failed: %s", mErrorMessage));
mErrorMessage = null;
});
}
}
interface Listener {
void onRemoteLockscreenValidationResult(RemoteLockscreenValidationResult result);
void onRemoteLockscreenValidationFailure(String message);
}
}

4
tests/robotests/src/com/android/settings/password/ConfirmLockPasswordTest.java
View File

@@ -197,7 +197,7 @@ public class ConfirmLockPasswordTest {
verify(mCredentialCheckResultTracker).setResult(
eq(true), any(), eq(0), eq(fragment.mEffectiveUserId));
assertThat(mLockPatternUtils.isSecure(fragment.mEffectiveUserId)).isTrue();
assertThat(fragment.mDeviceCredentialGuess).isNotNull();
assertThat(fragment.mRemoteLockscreenValidationFragment.getLockscreenCredential()).isNull();
}
@Test
@@ -223,7 +223,7 @@ public class ConfirmLockPasswordTest {
verify(mCredentialCheckResultTracker).setResult(
eq(true), any(), eq(0), eq(fragment.mEffectiveUserId));
assertThat(mLockPatternUtils.isSecure(fragment.mEffectiveUserId)).isFalse();
assertThat(fragment.mDeviceCredentialGuess).isNull();
assertThat(fragment.mRemoteLockscreenValidationFragment.getLockscreenCredential()).isNull();
}
@Test

4
tests/robotests/src/com/android/settings/password/ConfirmLockPatternTest.java
View File

@@ -177,7 +177,7 @@ public class ConfirmLockPatternTest {
verify(mCredentialCheckResultTracker).setResult(
eq(true), any(), eq(0), eq(fragment.mEffectiveUserId));
assertThat(mLockPatternUtils.isSecure(fragment.mEffectiveUserId)).isTrue();
assertThat(fragment.mDeviceCredentialGuess).isNotNull();
assertThat(fragment.mRemoteLockscreenValidationFragment.getLockscreenCredential()).isNull();
}
@Test
@@ -203,7 +203,7 @@ public class ConfirmLockPatternTest {
verify(mCredentialCheckResultTracker).setResult(
eq(true), any(), eq(0), eq(fragment.mEffectiveUserId));
assertThat(mLockPatternUtils.isSecure(fragment.mEffectiveUserId)).isFalse();
assertThat(fragment.mDeviceCredentialGuess).isNull();
assertThat(fragment.mRemoteLockscreenValidationFragment.getLockscreenCredential()).isNull();
}
@Test