diff options
Diffstat (limited to 'packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java')
| -rw-r--r-- | packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java new file mode 100644 index 000000000000..3108ae3d2354 --- /dev/null +++ b/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java @@ -0,0 +1,257 @@ +/* + * Copyright (C) 2020 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.keyguard; + +import static com.android.internal.util.LatencyTracker.ACTION_CHECK_CREDENTIAL; +import static com.android.internal.util.LatencyTracker.ACTION_CHECK_CREDENTIAL_UNLOCKED; +import static com.android.keyguard.KeyguardAbsKeyInputView.MINIMUM_PASSWORD_LENGTH_BEFORE_REPORT; + +import android.os.AsyncTask; +import android.os.CountDownTimer; +import android.os.SystemClock; +import android.view.KeyEvent; + +import com.android.internal.util.LatencyTracker; +import com.android.internal.widget.LockPatternChecker; +import com.android.internal.widget.LockPatternUtils; +import com.android.internal.widget.LockscreenCredential; +import com.android.keyguard.EmergencyButton.EmergencyButtonCallback; +import com.android.keyguard.KeyguardAbsKeyInputView.KeyDownListener; +import com.android.keyguard.KeyguardSecurityModel.SecurityMode; +import com.android.systemui.R; + +public abstract class KeyguardAbsKeyInputViewController<T extends KeyguardAbsKeyInputView> + extends KeyguardInputViewController<T> { + private final KeyguardUpdateMonitor mKeyguardUpdateMonitor; + private final LockPatternUtils mLockPatternUtils; + protected final KeyguardSecurityCallback mKeyguardSecurityCallback; + private final LatencyTracker mLatencyTracker; + private CountDownTimer mCountdownTimer; + protected KeyguardMessageAreaController mMessageAreaController; + private boolean mDismissing; + protected AsyncTask<?, ?, ?> mPendingLockCheck; + protected boolean mResumed; + + private final KeyDownListener mKeyDownListener = (keyCode, keyEvent) -> { + // Fingerprint sensor sends a KeyEvent.KEYCODE_UNKNOWN. + // We don't want to consider it valid user input because the UI + // will already respond to the event. + if (keyCode != KeyEvent.KEYCODE_UNKNOWN) { + onUserInput(); + } + return false; + }; + + private final EmergencyButtonCallback mEmergencyButtonCallback = new EmergencyButtonCallback() { + @Override + public void onEmergencyButtonClickedWhenInCall() { + mKeyguardSecurityCallback.reset(); + } + }; + + protected KeyguardAbsKeyInputViewController(T view, + KeyguardUpdateMonitor keyguardUpdateMonitor, + SecurityMode securityMode, + LockPatternUtils lockPatternUtils, + KeyguardSecurityCallback keyguardSecurityCallback, + KeyguardMessageAreaController.Factory messageAreaControllerFactory, + LatencyTracker latencyTracker) { + super(view, securityMode, keyguardSecurityCallback); + mKeyguardUpdateMonitor = keyguardUpdateMonitor; + mLockPatternUtils = lockPatternUtils; + mKeyguardSecurityCallback = keyguardSecurityCallback; + mLatencyTracker = latencyTracker; + KeyguardMessageArea kma = KeyguardMessageArea.findSecurityMessageDisplay(mView); + mMessageAreaController = messageAreaControllerFactory.create(kma); + } + + abstract void resetState(); + + @Override + protected void onViewAttached() { + mView.setKeyDownListener(mKeyDownListener); + mView.setEnableHaptics(mLockPatternUtils.isTactileFeedbackEnabled()); + EmergencyButton button = mView.findViewById(R.id.emergency_call_button); + if (button != null) { + button.setCallback(mEmergencyButtonCallback); + } + } + + @Override + public void reset() { + // start fresh + mDismissing = false; + mView.resetPasswordText(false /* animate */, false /* announce */); + // if the user is currently locked out, enforce it. + long deadline = mLockPatternUtils.getLockoutAttemptDeadline( + KeyguardUpdateMonitor.getCurrentUser()); + if (shouldLockout(deadline)) { + handleAttemptLockout(deadline); + } else { + mView.resetState(); + } + } + + // Allow subclasses to override this behavior + protected boolean shouldLockout(long deadline) { + return deadline != 0; + } + + // Prevent user from using the PIN/Password entry until scheduled deadline. + protected void handleAttemptLockout(long elapsedRealtimeDeadline) { + mView.setPasswordEntryEnabled(false); + long elapsedRealtime = SystemClock.elapsedRealtime(); + long secondsInFuture = (long) Math.ceil( + (elapsedRealtimeDeadline - elapsedRealtime) / 1000.0); + mCountdownTimer = new CountDownTimer(secondsInFuture * 1000, 1000) { + + @Override + public void onTick(long millisUntilFinished) { + int secondsRemaining = (int) Math.round(millisUntilFinished / 1000.0); + mMessageAreaController.setMessage(mView.getResources().getQuantityString( + R.plurals.kg_too_many_failed_attempts_countdown, + secondsRemaining, secondsRemaining)); + } + + @Override + public void onFinish() { + mMessageAreaController.setMessage(""); + resetState(); + } + }.start(); + } + + void onPasswordChecked(int userId, boolean matched, int timeoutMs, boolean isValidPassword) { + boolean dismissKeyguard = KeyguardUpdateMonitor.getCurrentUser() == userId; + if (matched) { + mKeyguardSecurityCallback.reportUnlockAttempt(userId, true, 0); + if (dismissKeyguard) { + mDismissing = true; + mKeyguardSecurityCallback.dismiss(true, userId); + } + } else { + if (isValidPassword) { + mKeyguardSecurityCallback.reportUnlockAttempt(userId, false, timeoutMs); + if (timeoutMs > 0) { + long deadline = mLockPatternUtils.setLockoutAttemptDeadline( + userId, timeoutMs); + handleAttemptLockout(deadline); + } + } + if (timeoutMs == 0) { + mMessageAreaController.setMessage(mView.getWrongPasswordStringId()); + } + } + mView.resetPasswordText(true /* animate */, !matched /* announce deletion if no match */); + } + + protected void verifyPasswordAndUnlock() { + if (mDismissing) return; // already verified but haven't been dismissed; don't do it again. + + final LockscreenCredential password = mView.getEnteredCredential(); + mView.setPasswordEntryInputEnabled(false); + if (mPendingLockCheck != null) { + mPendingLockCheck.cancel(false); + } + + final int userId = KeyguardUpdateMonitor.getCurrentUser(); + if (password.size() <= MINIMUM_PASSWORD_LENGTH_BEFORE_REPORT) { + // to avoid accidental lockout, only count attempts that are long enough to be a + // real password. This may require some tweaking. + mView.setPasswordEntryInputEnabled(true); + onPasswordChecked(userId, false /* matched */, 0, false /* not valid - too short */); + password.zeroize(); + return; + } + + mLatencyTracker.onActionStart(ACTION_CHECK_CREDENTIAL); + mLatencyTracker.onActionStart(ACTION_CHECK_CREDENTIAL_UNLOCKED); + + mKeyguardUpdateMonitor.setCredentialAttempted(); + mPendingLockCheck = LockPatternChecker.checkCredential( + mLockPatternUtils, + password, + userId, + new LockPatternChecker.OnCheckCallback() { + + @Override + public void onEarlyMatched() { + mLatencyTracker.onActionEnd(ACTION_CHECK_CREDENTIAL); + + onPasswordChecked(userId, true /* matched */, 0 /* timeoutMs */, + true /* isValidPassword */); + password.zeroize(); + } + + @Override + public void onChecked(boolean matched, int timeoutMs) { + mLatencyTracker.onActionEnd(ACTION_CHECK_CREDENTIAL_UNLOCKED); + mView.setPasswordEntryInputEnabled(true); + mPendingLockCheck = null; + if (!matched) { + onPasswordChecked(userId, false /* matched */, timeoutMs, + true /* isValidPassword */); + } + password.zeroize(); + } + + @Override + public void onCancelled() { + // We already got dismissed with the early matched callback, so we cancelled + // the check. However, we still need to note down the latency. + mLatencyTracker.onActionEnd(ACTION_CHECK_CREDENTIAL_UNLOCKED); + password.zeroize(); + } + }); + } + + @Override + public void showPromptReason(int reason) { + if (reason != PROMPT_REASON_NONE) { + int promtReasonStringRes = mView.getPromptReasonStringRes(reason); + if (promtReasonStringRes != 0) { + mMessageAreaController.setMessage(promtReasonStringRes); + } + } + } + + protected void onUserInput() { + mKeyguardSecurityCallback.userActivity(); + mKeyguardSecurityCallback.onUserInput(); + mMessageAreaController.setMessage(""); + } + + @Override + public void onResume(int reason) { + mResumed = true; + } + + @Override + public void onPause() { + mResumed = false; + + if (mCountdownTimer != null) { + mCountdownTimer.cancel(); + mCountdownTimer = null; + } + if (mPendingLockCheck != null) { + mPendingLockCheck.cancel(false); + mPendingLockCheck = null; + } + reset(); + } +} |