Xiyuan Xia | 6e38058 | 2015-05-05 15:16:08 -0700 | [diff] [blame^] | 1 | package com.android.internal.widget; |
| 2 | |
| 3 | import android.os.AsyncTask; |
| 4 | |
| 5 | import java.util.List; |
| 6 | |
| 7 | /** |
| 8 | * Helper class to check/verify PIN/Password/Pattern asynchronously. |
| 9 | */ |
| 10 | public final class LockPatternChecker { |
| 11 | /** |
| 12 | * Interface for a callback to be invoked after security check. |
| 13 | */ |
| 14 | public interface OnCheckCallback { |
| 15 | /** |
| 16 | * Invoked when a security check is finished. |
| 17 | * |
| 18 | * @param matched Whether the PIN/Password/Pattern matches the stored one. |
| 19 | */ |
| 20 | void onChecked(boolean matched); |
| 21 | } |
| 22 | |
| 23 | /** |
| 24 | * Interface for a callback to be invoked after security verification. |
| 25 | */ |
| 26 | public interface OnVerifyCallback { |
| 27 | /** |
| 28 | * Invoked when a security verification is finished. |
| 29 | * |
| 30 | * @param attestation The attestation that the challenge was verified, or null. |
| 31 | */ |
| 32 | void onVerified(byte[] attestation); |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Verify a pattern asynchronously. |
| 37 | * |
| 38 | * @param utils The LockPatternUtils instance to use. |
| 39 | * @param pattern The pattern to check. |
| 40 | * @param challenge The challenge to verify against the pattern. |
| 41 | * @param userId The user to check against the pattern. |
| 42 | * @param callback The callback to be invoked with the verification result. |
| 43 | */ |
| 44 | public static AsyncTask<?, ?, ?> verifyPattern(final LockPatternUtils utils, |
| 45 | final List<LockPatternView.Cell> pattern, |
| 46 | final long challenge, |
| 47 | final int userId, |
| 48 | final OnVerifyCallback callback) { |
| 49 | AsyncTask<Void, Void, byte[]> task = new AsyncTask<Void, Void, byte[]>() { |
| 50 | @Override |
| 51 | protected byte[] doInBackground(Void... args) { |
| 52 | return utils.verifyPattern(pattern, challenge, userId); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | protected void onPostExecute(byte[] result) { |
| 57 | callback.onVerified(result); |
| 58 | } |
| 59 | }; |
| 60 | task.execute(); |
| 61 | return task; |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Checks a pattern asynchronously. |
| 66 | * |
| 67 | * @param utils The LockPatternUtils instance to use. |
| 68 | * @param pattern The pattern to check. |
| 69 | * @param userId The user to check against the pattern. |
| 70 | * @param callback The callback to be invoked with the check result. |
| 71 | */ |
| 72 | public static AsyncTask<?, ?, ?> checkPattern(final LockPatternUtils utils, |
| 73 | final List<LockPatternView.Cell> pattern, |
| 74 | final int userId, |
| 75 | final OnCheckCallback callback) { |
| 76 | AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() { |
| 77 | @Override |
| 78 | protected Boolean doInBackground(Void... args) { |
| 79 | return utils.checkPattern(pattern, userId); |
| 80 | } |
| 81 | |
| 82 | @Override |
| 83 | protected void onPostExecute(Boolean result) { |
| 84 | callback.onChecked(result); |
| 85 | } |
| 86 | }; |
| 87 | task.execute(); |
| 88 | return task; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Verify a password asynchronously. |
| 93 | * |
| 94 | * @param utils The LockPatternUtils instance to use. |
| 95 | * @param password The password to check. |
| 96 | * @param challenge The challenge to verify against the pattern. |
| 97 | * @param userId The user to check against the pattern. |
| 98 | * @param callback The callback to be invoked with the verification result. |
| 99 | */ |
| 100 | public static AsyncTask<?, ?, ?> verifyPassword(final LockPatternUtils utils, |
| 101 | final String password, |
| 102 | final long challenge, |
| 103 | final int userId, |
| 104 | final OnVerifyCallback callback) { |
| 105 | AsyncTask<Void, Void, byte[]> task = new AsyncTask<Void, Void, byte[]>() { |
| 106 | @Override |
| 107 | protected byte[] doInBackground(Void... args) { |
| 108 | return utils.verifyPassword(password, challenge, userId); |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | protected void onPostExecute(byte[] result) { |
| 113 | callback.onVerified(result); |
| 114 | } |
| 115 | }; |
| 116 | task.execute(); |
| 117 | return task; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Checks a password asynchronously. |
| 122 | * |
| 123 | * @param utils The LockPatternUtils instance to use. |
| 124 | * @param password The password to check. |
| 125 | * @param userId The user to check against the pattern. |
| 126 | * @param callback The callback to be invoked with the check result. |
| 127 | */ |
| 128 | public static AsyncTask<?, ?, ?> checkPassword(final LockPatternUtils utils, |
| 129 | final String password, |
| 130 | final int userId, |
| 131 | final OnCheckCallback callback) { |
| 132 | AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() { |
| 133 | @Override |
| 134 | protected Boolean doInBackground(Void... args) { |
| 135 | return utils.checkPassword(password, userId); |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | protected void onPostExecute(Boolean result) { |
| 140 | callback.onChecked(result); |
| 141 | } |
| 142 | }; |
| 143 | task.execute(); |
| 144 | return task; |
| 145 | } |
| 146 | } |