package com.android.internal.widget; import android.os.AsyncTask; import com.android.internal.widget.LockPatternUtils.RequestThrottledException; import java.util.List; /** * Helper class to check/verify PIN/Password/Pattern asynchronously. */ public final class LockPatternChecker { /** * Interface for a callback to be invoked after security check. */ public interface OnCheckCallback { /** * Invoked when a security check is finished. * * @param matched Whether the PIN/Password/Pattern matches the stored one. * @param throttleTimeoutMs The amount of time in ms to wait before reattempting * the call. Only non-0 if matched is false. */ void onChecked(boolean matched, int throttleTimeoutMs); } /** * Interface for a callback to be invoked after security verification. */ public interface OnVerifyCallback { /** * Invoked when a security verification is finished. * * @param attestation The attestation that the challenge was verified, or null. * @param throttleTimeoutMs The amount of time in ms to wait before reattempting * the call. Only non-0 if attestation is null. */ void onVerified(byte[] attestation, int throttleTimeoutMs); } /** * Verify a pattern asynchronously. * * @param utils The LockPatternUtils instance to use. * @param pattern The pattern to check. * @param challenge The challenge to verify against the pattern. * @param userId The user to check against the pattern. * @param callback The callback to be invoked with the verification result. */ public static AsyncTask<?, ?, ?> verifyPattern(final LockPatternUtils utils, final List<LockPatternView.Cell> pattern, final long challenge, final int userId, final OnVerifyCallback callback) { AsyncTask<Void, Void, byte[]> task = new AsyncTask<Void, Void, byte[]>() { private int mThrottleTimeout; @Override protected byte[] doInBackground(Void... args) { try { return utils.verifyPattern(pattern, challenge, userId); } catch (RequestThrottledException ex) { mThrottleTimeout = ex.getTimeoutMs(); return null; } } @Override protected void onPostExecute(byte[] result) { callback.onVerified(result, mThrottleTimeout); } }; task.execute(); return task; } /** * Checks a pattern asynchronously. * * @param utils The LockPatternUtils instance to use. * @param pattern The pattern to check. * @param userId The user to check against the pattern. * @param callback The callback to be invoked with the check result. */ public static AsyncTask<?, ?, ?> checkPattern(final LockPatternUtils utils, final List<LockPatternView.Cell> pattern, final int userId, final OnCheckCallback callback) { AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() { private int mThrottleTimeout; @Override protected Boolean doInBackground(Void... args) { try { return utils.checkPattern(pattern, userId); } catch (RequestThrottledException ex) { mThrottleTimeout = ex.getTimeoutMs(); return false; } } @Override protected void onPostExecute(Boolean result) { callback.onChecked(result, mThrottleTimeout); } }; task.execute(); return task; } /** * Verify a password asynchronously. * * @param utils The LockPatternUtils instance to use. * @param password The password to check. * @param challenge The challenge to verify against the pattern. * @param userId The user to check against the pattern. * @param callback The callback to be invoked with the verification result. */ public static AsyncTask<?, ?, ?> verifyPassword(final LockPatternUtils utils, final String password, final long challenge, final int userId, final OnVerifyCallback callback) { AsyncTask<Void, Void, byte[]> task = new AsyncTask<Void, Void, byte[]>() { private int mThrottleTimeout; @Override protected byte[] doInBackground(Void... args) { try { return utils.verifyPassword(password, challenge, userId); } catch (RequestThrottledException ex) { mThrottleTimeout = ex.getTimeoutMs(); return null; } } @Override protected void onPostExecute(byte[] result) { callback.onVerified(result, mThrottleTimeout); } }; task.execute(); return task; } /** * Checks a password asynchronously. * * @param utils The LockPatternUtils instance to use. * @param password The password to check. * @param userId The user to check against the pattern. * @param callback The callback to be invoked with the check result. */ public static AsyncTask<?, ?, ?> checkPassword(final LockPatternUtils utils, final String password, final int userId, final OnCheckCallback callback) { AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() { private int mThrottleTimeout; @Override protected Boolean doInBackground(Void... args) { try { return utils.checkPassword(password, userId); } catch (RequestThrottledException ex) { mThrottleTimeout = ex.getTimeoutMs(); return false; } } @Override protected void onPostExecute(Boolean result) { callback.onChecked(result, mThrottleTimeout); } }; task.execute(); return task; } }