com.microsoft.aad.adal
Class StorageHelper

java.lang.Object
  com.microsoft.aad.adal.StorageHelper

public class StorageHelper
extends Object

Shared preferences store clear text. This class helps to encrypt/decrypt text to store. API SDK >= 18 has more security with AndroidKeyStore.

Field Summary

static int	DATA_KEY_LENGTH IV Key length for AES-128.
static int	MAC_LENGTH 256 bits output for signing message.
static String	VERSION_ANDROID_KEY_STORE
static String	VERSION_USER_DEFINED

Constructor Summary

StorageHelper(android.content.Context ctx)

Method Summary

String	decrypt(String value)
String	encrypt(String clearText) encrypt text with current key based on API level

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DATA_KEY_LENGTH

public static final int DATA_KEY_LENGTH

IV Key length for AES-128.

See Also:

Constant Field Values

MAC_LENGTH

public static final int MAC_LENGTH

256 bits output for signing message.

See Also:

Constant Field Values

VERSION_ANDROID_KEY_STORE

public static final String VERSION_ANDROID_KEY_STORE

See Also:

Constant Field Values

VERSION_USER_DEFINED

public static final String VERSION_USER_DEFINED

See Also:

Constant Field Values

Constructor Detail

StorageHelper

public StorageHelper(android.content.Context ctx)
              throws NoSuchAlgorithmException,
                     NoSuchPaddingException

Throws:

NoSuchAlgorithmException

NoSuchPaddingException

Method Detail

encrypt

public String encrypt(String clearText)
               throws NoSuchAlgorithmException,
                      InvalidKeySpecException,
                      InvalidKeyException,
                      InvalidAlgorithmParameterException,
                      IllegalBlockSizeException,
                      BadPaddingException,
                      IOException,
                      NoSuchPaddingException

encrypt text with current key based on API level

Parameters:

clearText -

Returns:

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

InvalidKeyException

InvalidAlgorithmParameterException

IllegalBlockSizeException

BadPaddingException

IOException

NoSuchPaddingException

decrypt

public String decrypt(String value)
               throws NoSuchAlgorithmException,
                      InvalidKeySpecException,
                      NoSuchPaddingException,
                      KeyStoreException,
                      CertificateException,
                      NoSuchProviderException,
                      InvalidAlgorithmParameterException,
                      UnrecoverableEntryException,
                      IOException,
                      InvalidKeyException,
                      DigestException,
                      IllegalBlockSizeException,
                      BadPaddingException

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

NoSuchPaddingException

KeyStoreException

CertificateException

NoSuchProviderException

InvalidAlgorithmParameterException

UnrecoverableEntryException

IOException

InvalidKeyException

DigestException

IllegalBlockSizeException

BadPaddingException