make android_id random seed depend on time as well as ro.serialno
Change-Id: I0a48aacd8da30896d91fa05b7791335e6ed751e5
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
index 4372cd8..5434694 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
@@ -222,16 +222,11 @@
final String value = c.moveToNext() ? c.getString(0) : null;
if (value == null) {
final SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
- String serial = SystemProperties.get("ro.serialno");
- if (serial != null) {
- try {
- random.setSeed(serial.getBytes("UTF-8"));
- } catch (UnsupportedEncodingException ignore) {
- // stick with default seed
- }
- }
+ String serial = SystemProperties.get("ro.serialno", "");
+ random.setSeed(
+ (serial + System.nanoTime() + new SecureRandom().nextLong()).getBytes());
final String newAndroidIdValue = Long.toHexString(random.nextLong());
- Log.d(TAG, "Generated and saved new ANDROID_ID");
+ Log.d(TAG, "Generated and saved new ANDROID_ID [" + newAndroidIdValue + "]");
final ContentValues values = new ContentValues();
values.put(Settings.NameValueTable.NAME, Settings.Secure.ANDROID_ID);
values.put(Settings.NameValueTable.VALUE, newAndroidIdValue);
