diff options
| -rw-r--r-- | packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java | 17 | ||||
| -rw-r--r-- | packages/SettingsProvider/test/src/com/android/providers/settings/SettingsProviderTest.java | 25 |
2 files changed, 38 insertions, 4 deletions
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java index d1d745fe2b93..693e2232f168 100644 --- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java +++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java @@ -3254,6 +3254,15 @@ public class SettingsProvider extends ContentProvider { return settingsState.getSettingLocked(name); } + private static boolean shouldExcludeSettingFromReset(Setting setting, String prefix) { + // If a prefix was specified, exclude settings whose names don't start with it. + if (prefix != null && !setting.getName().startsWith(prefix)) { + return true; + } + // Never reset SECURE_FRP_MODE, as it could be abused to bypass FRP via RescueParty. + return Global.SECURE_FRP_MODE.equals(setting.getName()); + } + public void resetSettingsLocked(int type, int userId, String packageName, int mode, String tag) { resetSettingsLocked(type, userId, packageName, mode, tag, /*prefix=*/ @@ -3276,7 +3285,7 @@ public class SettingsProvider extends ContentProvider { Setting setting = settingsState.getSettingLocked(name); if (packageName.equals(setting.getPackageName())) { if ((tag != null && !tag.equals(setting.getTag())) - || (prefix != null && !setting.getName().startsWith(prefix))) { + || shouldExcludeSettingFromReset(setting, prefix)) { continue; } if (settingsState.resetSettingLocked(name)) { @@ -3297,7 +3306,7 @@ public class SettingsProvider extends ContentProvider { Setting setting = settingsState.getSettingLocked(name); if (!SettingsState.isSystemPackage(getContext(), setting.getPackageName())) { - if (prefix != null && !setting.getName().startsWith(prefix)) { + if (shouldExcludeSettingFromReset(setting, prefix)) { continue; } if (settingsState.resetSettingLocked(name)) { @@ -3318,7 +3327,7 @@ public class SettingsProvider extends ContentProvider { Setting setting = settingsState.getSettingLocked(name); if (!SettingsState.isSystemPackage(getContext(), setting.getPackageName())) { - if (prefix != null && !setting.getName().startsWith(prefix)) { + if (shouldExcludeSettingFromReset(setting, prefix)) { continue; } if (setting.isDefaultFromSystem()) { @@ -3343,7 +3352,7 @@ public class SettingsProvider extends ContentProvider { for (String name : settingsState.getSettingNamesLocked()) { Setting setting = settingsState.getSettingLocked(name); boolean someSettingChanged = false; - if (prefix != null && !setting.getName().startsWith(prefix)) { + if (shouldExcludeSettingFromReset(setting, prefix)) { continue; } if (setting.isDefaultFromSystem()) { diff --git a/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsProviderTest.java b/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsProviderTest.java index eaf0dcb9b4e7..a945c33bc20a 100644 --- a/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsProviderTest.java +++ b/packages/SettingsProvider/test/src/com/android/providers/settings/SettingsProviderTest.java @@ -464,6 +464,31 @@ public class SettingsProviderTest extends BaseSettingsProviderTest { } } + // To prevent FRP bypasses, the SECURE_FRP_MODE setting should not be reset when all other + // settings are reset. But it should still be possible to explicitly set its value. + @Test + public void testSecureFrpModeSettingCannotBeReset() throws Exception { + final String name = Settings.Global.SECURE_FRP_MODE; + final String origValue = getSetting(SETTING_TYPE_GLOBAL, name); + setSettingViaShell(SETTING_TYPE_GLOBAL, name, "1", false); + try { + assertEquals("1", getSetting(SETTING_TYPE_GLOBAL, name)); + for (int type : new int[] { SETTING_TYPE_GLOBAL, SETTING_TYPE_SECURE }) { + resetSettingsViaShell(type, Settings.RESET_MODE_UNTRUSTED_DEFAULTS); + resetSettingsViaShell(type, Settings.RESET_MODE_UNTRUSTED_CHANGES); + resetSettingsViaShell(type, Settings.RESET_MODE_TRUSTED_DEFAULTS); + } + // The value should still be "1". It should not have been reset to null. + assertEquals("1", getSetting(SETTING_TYPE_GLOBAL, name)); + // It should still be possible to explicitly set the value to "0". + setSettingViaShell(SETTING_TYPE_GLOBAL, name, "0", false); + assertEquals("0", getSetting(SETTING_TYPE_GLOBAL, name)); + } finally { + setSettingViaShell(SETTING_TYPE_GLOBAL, name, origValue, false); + assertEquals(origValue, getSetting(SETTING_TYPE_GLOBAL, name)); + } + } + private void doTestQueryStringInBracketsViaProviderApiForType(int type) { // Make sure we have a clean slate. deleteStringViaProviderApi(type, FAKE_SETTING_NAME); |