Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
Adrian Roos | e542499 | 2014-11-07 21:47:17 +0100 | [diff] [blame] | 19 | import com.android.internal.annotations.VisibleForTesting; |
| 20 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 21 | import android.content.ContentValues; |
| 22 | import android.content.Context; |
| 23 | import android.content.pm.UserInfo; |
| 24 | import android.database.Cursor; |
| 25 | import android.database.sqlite.SQLiteDatabase; |
| 26 | import android.database.sqlite.SQLiteOpenHelper; |
| 27 | import android.os.Environment; |
| 28 | import android.os.UserManager; |
| 29 | import android.util.ArrayMap; |
| 30 | import android.util.Log; |
| 31 | import android.util.Slog; |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 32 | import android.util.SparseArray; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 33 | |
| 34 | import java.io.File; |
| 35 | import java.io.IOException; |
| 36 | import java.io.RandomAccessFile; |
| 37 | |
| 38 | import static android.content.Context.USER_SERVICE; |
| 39 | |
| 40 | /** |
| 41 | * Storage for the lock settings service. |
| 42 | */ |
| 43 | class LockSettingsStorage { |
| 44 | |
| 45 | private static final String TAG = "LockSettingsStorage"; |
| 46 | private static final String TABLE = "locksettings"; |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 47 | private static final boolean DEBUG = false; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 48 | |
| 49 | private static final String COLUMN_KEY = "name"; |
| 50 | private static final String COLUMN_USERID = "user"; |
| 51 | private static final String COLUMN_VALUE = "value"; |
| 52 | |
| 53 | private static final String[] COLUMNS_FOR_QUERY = { |
| 54 | COLUMN_VALUE |
| 55 | }; |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 56 | private static final String[] COLUMNS_FOR_PREFETCH = { |
| 57 | COLUMN_KEY, COLUMN_VALUE |
| 58 | }; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 59 | |
| 60 | private static final String SYSTEM_DIRECTORY = "/system/"; |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 61 | private static final String LOCK_PATTERN_FILE = "gatekeeper.pattern.key"; |
| 62 | private static final String BASE_ZERO_LOCK_PATTERN_FILE = "gatekeeper.gesture.key"; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 63 | private static final String LEGACY_LOCK_PATTERN_FILE = "gesture.key"; |
| 64 | private static final String LOCK_PASSWORD_FILE = "gatekeeper.password.key"; |
| 65 | private static final String LEGACY_LOCK_PASSWORD_FILE = "password.key"; |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 66 | private static final String CHILD_PROFILE_LOCK_FILE = "gatekeeper.profile.key"; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 67 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 68 | private static final Object DEFAULT = new Object(); |
| 69 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 70 | private final DatabaseHelper mOpenHelper; |
| 71 | private final Context mContext; |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 72 | private final Cache mCache = new Cache(); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 73 | private final Object mFileWriteLock = new Object(); |
| 74 | |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 75 | private SparseArray<Integer> mStoredCredentialType; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 76 | |
| 77 | class CredentialHash { |
| 78 | static final int TYPE_NONE = -1; |
| 79 | static final int TYPE_PATTERN = 1; |
| 80 | static final int TYPE_PASSWORD = 2; |
| 81 | |
| 82 | static final int VERSION_LEGACY = 0; |
| 83 | static final int VERSION_GATEKEEPER = 1; |
| 84 | |
| 85 | CredentialHash(byte[] hash, int version) { |
| 86 | this.hash = hash; |
| 87 | this.version = version; |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 88 | this.isBaseZeroPattern = false; |
| 89 | } |
| 90 | |
| 91 | CredentialHash(byte[] hash, boolean isBaseZeroPattern) { |
| 92 | this.hash = hash; |
| 93 | this.version = VERSION_GATEKEEPER; |
| 94 | this.isBaseZeroPattern = isBaseZeroPattern; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | byte[] hash; |
| 98 | int version; |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 99 | boolean isBaseZeroPattern; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 102 | public LockSettingsStorage(Context context, Callback callback) { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 103 | mContext = context; |
| 104 | mOpenHelper = new DatabaseHelper(context, callback); |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 105 | mStoredCredentialType = new SparseArray<Integer>(); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 106 | } |
| 107 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 108 | public void writeKeyValue(String key, String value, int userId) { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 109 | writeKeyValue(mOpenHelper.getWritableDatabase(), key, value, userId); |
| 110 | } |
| 111 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 112 | public void writeKeyValue(SQLiteDatabase db, String key, String value, int userId) { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 113 | ContentValues cv = new ContentValues(); |
| 114 | cv.put(COLUMN_KEY, key); |
| 115 | cv.put(COLUMN_USERID, userId); |
| 116 | cv.put(COLUMN_VALUE, value); |
| 117 | |
| 118 | db.beginTransaction(); |
| 119 | try { |
| 120 | db.delete(TABLE, COLUMN_KEY + "=? AND " + COLUMN_USERID + "=?", |
| 121 | new String[] {key, Integer.toString(userId)}); |
| 122 | db.insert(TABLE, null, cv); |
| 123 | db.setTransactionSuccessful(); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 124 | mCache.putKeyValue(key, value, userId); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 125 | } finally { |
| 126 | db.endTransaction(); |
| 127 | } |
| 128 | |
| 129 | } |
| 130 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 131 | public String readKeyValue(String key, String defaultValue, int userId) { |
| 132 | int version; |
| 133 | synchronized (mCache) { |
| 134 | if (mCache.hasKeyValue(key, userId)) { |
| 135 | return mCache.peekKeyValue(key, defaultValue, userId); |
| 136 | } |
| 137 | version = mCache.getVersion(); |
| 138 | } |
| 139 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 140 | Cursor cursor; |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 141 | Object result = DEFAULT; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 142 | SQLiteDatabase db = mOpenHelper.getReadableDatabase(); |
| 143 | if ((cursor = db.query(TABLE, COLUMNS_FOR_QUERY, |
| 144 | COLUMN_USERID + "=? AND " + COLUMN_KEY + "=?", |
| 145 | new String[] { Integer.toString(userId), key }, |
| 146 | null, null, null)) != null) { |
| 147 | if (cursor.moveToFirst()) { |
| 148 | result = cursor.getString(0); |
| 149 | } |
| 150 | cursor.close(); |
| 151 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 152 | mCache.putKeyValueIfUnchanged(key, result, userId, version); |
| 153 | return result == DEFAULT ? defaultValue : (String) result; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 156 | public void prefetchUser(int userId) { |
| 157 | int version; |
| 158 | synchronized (mCache) { |
| 159 | if (mCache.isFetched(userId)) { |
| 160 | return; |
| 161 | } |
| 162 | mCache.setFetched(userId); |
| 163 | version = mCache.getVersion(); |
| 164 | } |
| 165 | |
| 166 | Cursor cursor; |
| 167 | SQLiteDatabase db = mOpenHelper.getReadableDatabase(); |
| 168 | if ((cursor = db.query(TABLE, COLUMNS_FOR_PREFETCH, |
| 169 | COLUMN_USERID + "=?", |
| 170 | new String[] { Integer.toString(userId) }, |
| 171 | null, null, null)) != null) { |
| 172 | while (cursor.moveToNext()) { |
| 173 | String key = cursor.getString(0); |
| 174 | String value = cursor.getString(1); |
| 175 | mCache.putKeyValueIfUnchanged(key, value, userId, version); |
| 176 | } |
| 177 | cursor.close(); |
| 178 | } |
| 179 | |
| 180 | // Populate cache by reading the password and pattern files. |
| 181 | readPasswordHash(userId); |
| 182 | readPatternHash(userId); |
| 183 | } |
| 184 | |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 185 | public int getStoredCredentialType(int userId) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 186 | final Integer cachedStoredCredentialType = mStoredCredentialType.get(userId); |
| 187 | if (cachedStoredCredentialType != null) { |
| 188 | return cachedStoredCredentialType.intValue(); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 189 | } |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 190 | |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 191 | int storedCredentialType; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 192 | CredentialHash pattern = readPatternHash(userId); |
| 193 | if (pattern == null) { |
| 194 | if (readPasswordHash(userId) != null) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 195 | storedCredentialType = CredentialHash.TYPE_PASSWORD; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 196 | } else { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 197 | storedCredentialType = CredentialHash.TYPE_NONE; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 198 | } |
| 199 | } else { |
| 200 | CredentialHash password = readPasswordHash(userId); |
| 201 | if (password != null) { |
| 202 | // Both will never be GateKeeper |
| 203 | if (password.version == CredentialHash.VERSION_GATEKEEPER) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 204 | storedCredentialType = CredentialHash.TYPE_PASSWORD; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 205 | } else { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 206 | storedCredentialType = CredentialHash.TYPE_PATTERN; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 207 | } |
| 208 | } else { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 209 | storedCredentialType = CredentialHash.TYPE_PATTERN; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 210 | } |
| 211 | } |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 212 | mStoredCredentialType.put(userId, storedCredentialType); |
| 213 | return storedCredentialType; |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | |
| 217 | public CredentialHash readPasswordHash(int userId) { |
| 218 | byte[] stored = readFile(getLockPasswordFilename(userId)); |
| 219 | if (stored != null && stored.length > 0) { |
| 220 | return new CredentialHash(stored, CredentialHash.VERSION_GATEKEEPER); |
| 221 | } |
| 222 | |
| 223 | stored = readFile(getLegacyLockPasswordFilename(userId)); |
| 224 | if (stored != null && stored.length > 0) { |
| 225 | return new CredentialHash(stored, CredentialHash.VERSION_LEGACY); |
| 226 | } |
| 227 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 228 | return null; |
| 229 | } |
| 230 | |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 231 | public CredentialHash readPatternHash(int userId) { |
| 232 | byte[] stored = readFile(getLockPatternFilename(userId)); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 233 | if (stored != null && stored.length > 0) { |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 234 | return new CredentialHash(stored, CredentialHash.VERSION_GATEKEEPER); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 235 | } |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 236 | |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 237 | stored = readFile(getBaseZeroLockPatternFilename(userId)); |
| 238 | if (stored != null && stored.length > 0) { |
| 239 | return new CredentialHash(stored, true); |
| 240 | } |
| 241 | |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 242 | stored = readFile(getLegacyLockPatternFilename(userId)); |
| 243 | if (stored != null && stored.length > 0) { |
| 244 | return new CredentialHash(stored, CredentialHash.VERSION_LEGACY); |
| 245 | } |
| 246 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 247 | return null; |
| 248 | } |
| 249 | |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 250 | public void removeChildProfileLock(int userId) { |
| 251 | if (DEBUG) |
| 252 | Slog.e(TAG, "Remove child profile lock for user: " + userId); |
| 253 | try { |
| 254 | deleteFile(getChildProfileLockFile(userId)); |
| 255 | } catch (Exception e) { |
| 256 | e.printStackTrace(); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | public void writeChildProfileLock(int userId, byte[] lock) { |
| 261 | writeFile(getChildProfileLockFile(userId), lock); |
| 262 | } |
| 263 | |
| 264 | public byte[] readChildProfileLock(int userId) { |
| 265 | return readFile(getChildProfileLockFile(userId)); |
| 266 | } |
| 267 | |
| 268 | public boolean hasChildProfileLock(int userId) { |
| 269 | return hasFile(getChildProfileLockFile(userId)); |
| 270 | } |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 271 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 272 | public boolean hasPassword(int userId) { |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 273 | return hasFile(getLockPasswordFilename(userId)) || |
| 274 | hasFile(getLegacyLockPasswordFilename(userId)); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 275 | } |
| 276 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 277 | public boolean hasPattern(int userId) { |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 278 | return hasFile(getLockPatternFilename(userId)) || |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 279 | hasFile(getBaseZeroLockPatternFilename(userId)) || |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 280 | hasFile(getLegacyLockPatternFilename(userId)); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 281 | } |
| 282 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 283 | private boolean hasFile(String name) { |
| 284 | byte[] contents = readFile(name); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 285 | return contents != null && contents.length > 0; |
| 286 | } |
| 287 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 288 | private byte[] readFile(String name) { |
| 289 | int version; |
| 290 | synchronized (mCache) { |
| 291 | if (mCache.hasFile(name)) { |
| 292 | return mCache.peekFile(name); |
| 293 | } |
| 294 | version = mCache.getVersion(); |
| 295 | } |
| 296 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 297 | RandomAccessFile raf = null; |
| 298 | byte[] stored = null; |
| 299 | try { |
| 300 | raf = new RandomAccessFile(name, "r"); |
| 301 | stored = new byte[(int) raf.length()]; |
| 302 | raf.readFully(stored, 0, stored.length); |
| 303 | raf.close(); |
| 304 | } catch (IOException e) { |
| 305 | Slog.e(TAG, "Cannot read file " + e); |
| 306 | } finally { |
| 307 | if (raf != null) { |
| 308 | try { |
| 309 | raf.close(); |
| 310 | } catch (IOException e) { |
| 311 | Slog.e(TAG, "Error closing file " + e); |
| 312 | } |
| 313 | } |
| 314 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 315 | mCache.putFileIfUnchanged(name, stored, version); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 316 | return stored; |
| 317 | } |
| 318 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 319 | private void writeFile(String name, byte[] hash) { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 320 | synchronized (mFileWriteLock) { |
| 321 | RandomAccessFile raf = null; |
| 322 | try { |
| 323 | // Write the hash to file |
| 324 | raf = new RandomAccessFile(name, "rw"); |
| 325 | // Truncate the file if pattern is null, to clear the lock |
| 326 | if (hash == null || hash.length == 0) { |
| 327 | raf.setLength(0); |
| 328 | } else { |
| 329 | raf.write(hash, 0, hash.length); |
| 330 | } |
| 331 | raf.close(); |
| 332 | } catch (IOException e) { |
| 333 | Slog.e(TAG, "Error writing to file " + e); |
| 334 | } finally { |
| 335 | if (raf != null) { |
| 336 | try { |
| 337 | raf.close(); |
| 338 | } catch (IOException e) { |
| 339 | Slog.e(TAG, "Error closing file " + e); |
| 340 | } |
| 341 | } |
| 342 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 343 | mCache.putFile(name, hash); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 344 | } |
| 345 | } |
| 346 | |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 347 | private void deleteFile(String name) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 348 | if (DEBUG) Slog.e(TAG, "Delete file " + name); |
| 349 | synchronized (mFileWriteLock) { |
| 350 | File file = new File(name); |
| 351 | if (file.exists()) { |
| 352 | file.delete(); |
| 353 | mCache.putFile(name, null); |
| 354 | } |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 355 | } |
| 356 | } |
| 357 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 358 | public void writePatternHash(byte[] hash, int userId) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 359 | mStoredCredentialType.put(userId, hash == null ? CredentialHash.TYPE_NONE |
| 360 | : CredentialHash.TYPE_PATTERN); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 361 | writeFile(getLockPatternFilename(userId), hash); |
Robin Lee | 68e4ba4 | 2015-03-10 12:34:28 +0000 | [diff] [blame] | 362 | clearPasswordHash(userId); |
| 363 | } |
| 364 | |
| 365 | private void clearPatternHash(int userId) { |
| 366 | writeFile(getLockPatternFilename(userId), null); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | public void writePasswordHash(byte[] hash, int userId) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 370 | mStoredCredentialType.put(userId, hash == null ? CredentialHash.TYPE_NONE |
| 371 | : CredentialHash.TYPE_PASSWORD); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 372 | writeFile(getLockPasswordFilename(userId), hash); |
Robin Lee | 68e4ba4 | 2015-03-10 12:34:28 +0000 | [diff] [blame] | 373 | clearPatternHash(userId); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 374 | } |
| 375 | |
Robin Lee | 68e4ba4 | 2015-03-10 12:34:28 +0000 | [diff] [blame] | 376 | private void clearPasswordHash(int userId) { |
| 377 | writeFile(getLockPasswordFilename(userId), null); |
| 378 | } |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 379 | |
Adrian Roos | e542499 | 2014-11-07 21:47:17 +0100 | [diff] [blame] | 380 | @VisibleForTesting |
| 381 | String getLockPatternFilename(int userId) { |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 382 | return getLockCredentialFilePathForUser(userId, LOCK_PATTERN_FILE); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 383 | } |
| 384 | |
Adrian Roos | e542499 | 2014-11-07 21:47:17 +0100 | [diff] [blame] | 385 | @VisibleForTesting |
| 386 | String getLockPasswordFilename(int userId) { |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 387 | return getLockCredentialFilePathForUser(userId, LOCK_PASSWORD_FILE); |
| 388 | } |
| 389 | |
Andres Morales | 8fa5665 | 2015-03-31 09:19:50 -0700 | [diff] [blame] | 390 | @VisibleForTesting |
| 391 | String getLegacyLockPatternFilename(int userId) { |
| 392 | return getLockCredentialFilePathForUser(userId, LEGACY_LOCK_PATTERN_FILE); |
| 393 | } |
| 394 | |
| 395 | @VisibleForTesting |
| 396 | String getLegacyLockPasswordFilename(int userId) { |
| 397 | return getLockCredentialFilePathForUser(userId, LEGACY_LOCK_PASSWORD_FILE); |
| 398 | } |
| 399 | |
Andres Morales | e40bad8 | 2015-05-28 14:21:36 -0700 | [diff] [blame] | 400 | private String getBaseZeroLockPatternFilename(int userId) { |
| 401 | return getLockCredentialFilePathForUser(userId, BASE_ZERO_LOCK_PATTERN_FILE); |
| 402 | } |
| 403 | |
Ricky Wai | a46b40f | 2016-03-31 16:48:29 +0100 | [diff] [blame] | 404 | @VisibleForTesting |
| 405 | String getChildProfileLockFile(int userId) { |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 406 | return getLockCredentialFilePathForUser(userId, CHILD_PROFILE_LOCK_FILE); |
| 407 | } |
| 408 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 409 | private String getLockCredentialFilePathForUser(int userId, String basename) { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 410 | String dataSystemDirectory = |
| 411 | android.os.Environment.getDataDirectory().getAbsolutePath() + |
| 412 | SYSTEM_DIRECTORY; |
| 413 | if (userId == 0) { |
| 414 | // Leave it in the same place for user 0 |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 415 | return dataSystemDirectory + basename; |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 416 | } else { |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 417 | return new File(Environment.getUserSystemDirectory(userId), basename).getAbsolutePath(); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 418 | } |
| 419 | } |
| 420 | |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 421 | public void removeUser(int userId) { |
| 422 | SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| 423 | |
| 424 | final UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| 425 | final UserInfo parentInfo = um.getProfileParent(userId); |
| 426 | |
Robin Lee | 68e4ba4 | 2015-03-10 12:34:28 +0000 | [diff] [blame] | 427 | if (parentInfo == null) { |
| 428 | // This user owns its lock settings files - safe to delete them |
| 429 | synchronized (mFileWriteLock) { |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 430 | String name = getLockPasswordFilename(userId); |
| 431 | File file = new File(name); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 432 | if (file.exists()) { |
| 433 | file.delete(); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 434 | mCache.putFile(name, null); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 435 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 436 | name = getLockPatternFilename(userId); |
| 437 | file = new File(name); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 438 | if (file.exists()) { |
| 439 | file.delete(); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 440 | mCache.putFile(name, null); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 441 | } |
| 442 | } |
Ricky Wai | dc283a8 | 2016-03-24 19:55:08 +0000 | [diff] [blame] | 443 | } else { |
| 444 | // Manged profile |
| 445 | removeChildProfileLock(userId); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | try { |
| 449 | db.beginTransaction(); |
| 450 | db.delete(TABLE, COLUMN_USERID + "='" + userId + "'", null); |
| 451 | db.setTransactionSuccessful(); |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 452 | mCache.removeUser(userId); |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 453 | } finally { |
| 454 | db.endTransaction(); |
| 455 | } |
| 456 | } |
| 457 | |
Adrian Roos | e542499 | 2014-11-07 21:47:17 +0100 | [diff] [blame] | 458 | @VisibleForTesting |
| 459 | void closeDatabase() { |
| 460 | mOpenHelper.close(); |
| 461 | } |
| 462 | |
| 463 | @VisibleForTesting |
| 464 | void clearCache() { |
| 465 | mCache.clear(); |
| 466 | } |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 467 | |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 468 | public interface Callback { |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 469 | void initialize(SQLiteDatabase db); |
| 470 | } |
| 471 | |
| 472 | class DatabaseHelper extends SQLiteOpenHelper { |
| 473 | private static final String TAG = "LockSettingsDB"; |
| 474 | private static final String DATABASE_NAME = "locksettings.db"; |
| 475 | |
| 476 | private static final int DATABASE_VERSION = 2; |
| 477 | |
| 478 | private final Callback mCallback; |
| 479 | |
| 480 | public DatabaseHelper(Context context, Callback callback) { |
| 481 | super(context, DATABASE_NAME, null, DATABASE_VERSION); |
| 482 | setWriteAheadLoggingEnabled(true); |
| 483 | mCallback = callback; |
| 484 | } |
| 485 | |
| 486 | private void createTable(SQLiteDatabase db) { |
| 487 | db.execSQL("CREATE TABLE " + TABLE + " (" + |
| 488 | "_id INTEGER PRIMARY KEY AUTOINCREMENT," + |
| 489 | COLUMN_KEY + " TEXT," + |
| 490 | COLUMN_USERID + " INTEGER," + |
| 491 | COLUMN_VALUE + " TEXT" + |
| 492 | ");"); |
| 493 | } |
| 494 | |
| 495 | @Override |
| 496 | public void onCreate(SQLiteDatabase db) { |
| 497 | createTable(db); |
| 498 | mCallback.initialize(db); |
| 499 | } |
| 500 | |
| 501 | @Override |
| 502 | public void onUpgrade(SQLiteDatabase db, int oldVersion, int currentVersion) { |
| 503 | int upgradeVersion = oldVersion; |
| 504 | if (upgradeVersion == 1) { |
| 505 | // Previously migrated lock screen widget settings. Now defunct. |
| 506 | upgradeVersion = 2; |
| 507 | } |
| 508 | |
| 509 | if (upgradeVersion != DATABASE_VERSION) { |
| 510 | Log.w(TAG, "Failed to upgrade database!"); |
| 511 | } |
| 512 | } |
| 513 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 514 | |
| 515 | /** |
| 516 | * Cache consistency model: |
| 517 | * - Writes to storage write directly to the cache, but this MUST happen within the atomic |
| 518 | * section either provided by the database transaction or mWriteLock, such that writes to the |
| 519 | * cache and writes to the backing storage are guaranteed to occur in the same order |
| 520 | * |
| 521 | * - Reads can populate the cache, but because they are no strong ordering guarantees with |
| 522 | * respect to writes this precaution is taken: |
| 523 | * - The cache is assigned a version number that increases every time the cache is modified. |
| 524 | * Reads from backing storage can only populate the cache if the backing storage |
| 525 | * has not changed since the load operation has begun. |
| 526 | * This guarantees that no read operation can shadow a write to the cache that happens |
| 527 | * after it had begun. |
| 528 | */ |
| 529 | private static class Cache { |
| 530 | private final ArrayMap<CacheKey, Object> mCache = new ArrayMap<>(); |
| 531 | private final CacheKey mCacheKey = new CacheKey(); |
| 532 | private int mVersion = 0; |
| 533 | |
| 534 | String peekKeyValue(String key, String defaultValue, int userId) { |
| 535 | Object cached = peek(CacheKey.TYPE_KEY_VALUE, key, userId); |
| 536 | return cached == DEFAULT ? defaultValue : (String) cached; |
| 537 | } |
| 538 | |
| 539 | boolean hasKeyValue(String key, int userId) { |
| 540 | return contains(CacheKey.TYPE_KEY_VALUE, key, userId); |
| 541 | } |
| 542 | |
| 543 | void putKeyValue(String key, String value, int userId) { |
| 544 | put(CacheKey.TYPE_KEY_VALUE, key, value, userId); |
| 545 | } |
| 546 | |
| 547 | void putKeyValueIfUnchanged(String key, Object value, int userId, int version) { |
| 548 | putIfUnchanged(CacheKey.TYPE_KEY_VALUE, key, value, userId, version); |
| 549 | } |
| 550 | |
| 551 | byte[] peekFile(String fileName) { |
| 552 | return (byte[]) peek(CacheKey.TYPE_FILE, fileName, -1 /* userId */); |
| 553 | } |
| 554 | |
| 555 | boolean hasFile(String fileName) { |
| 556 | return contains(CacheKey.TYPE_FILE, fileName, -1 /* userId */); |
| 557 | } |
| 558 | |
| 559 | void putFile(String key, byte[] value) { |
| 560 | put(CacheKey.TYPE_FILE, key, value, -1 /* userId */); |
| 561 | } |
| 562 | |
| 563 | void putFileIfUnchanged(String key, byte[] value, int version) { |
| 564 | putIfUnchanged(CacheKey.TYPE_FILE, key, value, -1 /* userId */, version); |
| 565 | } |
| 566 | |
| 567 | void setFetched(int userId) { |
| 568 | put(CacheKey.TYPE_FETCHED, "isFetched", "true", userId); |
| 569 | } |
| 570 | |
| 571 | boolean isFetched(int userId) { |
| 572 | return contains(CacheKey.TYPE_FETCHED, "", userId); |
| 573 | } |
| 574 | |
| 575 | |
| 576 | private synchronized void put(int type, String key, Object value, int userId) { |
| 577 | // Create a new CachKey here because it may be saved in the map if the key is absent. |
| 578 | mCache.put(new CacheKey().set(type, key, userId), value); |
| 579 | mVersion++; |
| 580 | } |
| 581 | |
| 582 | private synchronized void putIfUnchanged(int type, String key, Object value, int userId, |
| 583 | int version) { |
| 584 | if (!contains(type, key, userId) && mVersion == version) { |
| 585 | put(type, key, value, userId); |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | private synchronized boolean contains(int type, String key, int userId) { |
| 590 | return mCache.containsKey(mCacheKey.set(type, key, userId)); |
| 591 | } |
| 592 | |
| 593 | private synchronized Object peek(int type, String key, int userId) { |
| 594 | return mCache.get(mCacheKey.set(type, key, userId)); |
| 595 | } |
| 596 | |
| 597 | private synchronized int getVersion() { |
| 598 | return mVersion; |
| 599 | } |
| 600 | |
| 601 | synchronized void removeUser(int userId) { |
| 602 | for (int i = mCache.size() - 1; i >= 0; i--) { |
| 603 | if (mCache.keyAt(i).userId == userId) { |
| 604 | mCache.removeAt(i); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | // Make sure in-flight loads can't write to cache. |
| 609 | mVersion++; |
| 610 | } |
| 611 | |
Adrian Roos | e542499 | 2014-11-07 21:47:17 +0100 | [diff] [blame] | 612 | synchronized void clear() { |
| 613 | mCache.clear(); |
| 614 | mVersion++; |
| 615 | } |
Adrian Roos | 3dcae68 | 2014-10-29 14:43:56 +0100 | [diff] [blame] | 616 | |
| 617 | private static final class CacheKey { |
| 618 | static final int TYPE_KEY_VALUE = 0; |
| 619 | static final int TYPE_FILE = 1; |
| 620 | static final int TYPE_FETCHED = 2; |
| 621 | |
| 622 | String key; |
| 623 | int userId; |
| 624 | int type; |
| 625 | |
| 626 | public CacheKey set(int type, String key, int userId) { |
| 627 | this.type = type; |
| 628 | this.key = key; |
| 629 | this.userId = userId; |
| 630 | return this; |
| 631 | } |
| 632 | |
| 633 | @Override |
| 634 | public boolean equals(Object obj) { |
| 635 | if (!(obj instanceof CacheKey)) |
| 636 | return false; |
| 637 | CacheKey o = (CacheKey) obj; |
| 638 | return userId == o.userId && type == o.type && key.equals(o.key); |
| 639 | } |
| 640 | |
| 641 | @Override |
| 642 | public int hashCode() { |
| 643 | return key.hashCode() ^ userId ^ type; |
| 644 | } |
| 645 | } |
| 646 | } |
Adrian Roos | 261d5ab | 2014-10-29 14:42:38 +0100 | [diff] [blame] | 647 | } |