private static String generateAesKeyName(Context context)
throws InvalidKeySpecException, NoSuchAlgorithmException, NoSuchProviderException {
final char[] password = context.getPackageName().toCharArray();
final byte[] salt = getDeviceSerialNumber(context).getBytes();
SecretKey key;
try {
// TODO: what if there's an OS upgrade and now supports the primary
// PBE
key =
SecurePreferencesOld.generatePBEKey(
password, salt, PRIMARY_PBE_KEY_ALG, ITERATIONS, KEY_SIZE);
} catch (NoSuchAlgorithmException e) {
// older devices may not support the have the implementation try
// with a weaker
// algorthm
key =
SecurePreferencesOld.generatePBEKey(
password, salt, BACKUP_PBE_KEY_ALG, ITERATIONS, KEY_SIZE);
}
return SecurePreferencesOld.encode(key.getEncoded());
}
