/**
* Constructor.
*
* @param context the caller's context
*/
public SecurePreferencesOld(Context context) {
// Proxy design pattern
if (SecurePreferencesOld.sFile == null) {
SecurePreferencesOld.sFile = PreferenceManager.getDefaultSharedPreferences(context);
}
// Initialize encryption/decryption key
try {
final String key = SecurePreferencesOld.generateAesKeyName(context);
String value = SecurePreferencesOld.sFile.getString(key, null);
if (value == null) {
value = SecurePreferencesOld.generateAesKeyValue();
SecurePreferencesOld.sFile.edit().putString(key, value).commit();
}
SecurePreferencesOld.sKey = SecurePreferencesOld.decode(value);
} catch (Exception e) {
if (sLoggingEnabled) {
Log.e(TAG, "Error init:" + e.getMessage());
}
throw new IllegalStateException(e);
}
// initialize OnSecurePreferencesChangeListener HashMap
sOnSharedPreferenceChangeListeners =
new HashMap<OnSharedPreferenceChangeListener, OnSharedPreferenceChangeListener>(10);
}
@Deprecated
private static String decrypt(String ciphertext) {
if (ciphertext == null || ciphertext.length() == 0) {
return ciphertext;
}
try {
final Cipher cipher = Cipher.getInstance(AES_KEY_ALG, PROVIDER);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(SecurePreferencesOld.sKey, AES_KEY_ALG));
return new String(cipher.doFinal(SecurePreferencesOld.decode(ciphertext)), "UTF-8");
} catch (Exception e) {
if (sLoggingEnabled) {
Log.w(TAG, "decrypt", e);
}
return null;
}
}