@Deprecated
private static String encrypt(String cleartext) {
if (cleartext == null || cleartext.length() == 0) {
return cleartext;
}
try {
final Cipher cipher = Cipher.getInstance(AES_KEY_ALG, PROVIDER);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(SecurePreferencesOld.sKey, AES_KEY_ALG));
return SecurePreferencesOld.encode(cipher.doFinal(cleartext.getBytes("UTF-8")));
} catch (Exception e) {
if (sLoggingEnabled) {
Log.w(TAG, "encrypt", e);
}
return null;
}
}
@Deprecated
private static String generateAesKeyValue() throws NoSuchAlgorithmException {
// Do *not* seed secureRandom! Automatically seeded from system entropy
final SecureRandom random = new SecureRandom();
// Use the largest AES key length which is supported by the OS
final KeyGenerator generator = KeyGenerator.getInstance("AES");
try {
generator.init(KEY_SIZE, random);
} catch (Exception e) {
try {
generator.init(192, random);
} catch (Exception e1) {
generator.init(128, random);
}
}
return SecurePreferencesOld.encode(generator.generateKey().getEncoded());
}
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());
}
