ydSqumeS

1Cipher cipher = null;
2        String transformation = KeyProperties.KEY_ALGORITHM_AES + "/"
3                + KeyProperties.BLOCK_MODE_CBC + "/"
4                + KeyProperties.ENCRYPTION_PADDING_PKCS7;
5        try {
6            cipher = Cipher.getInstance(transformation);
7
8        } catch (NoSuchAlgorithmException e) {
9            e.printStackTrace();
10        } catch (NoSuchPaddingException e) {
11            e.printStackTrace();
12        }
13
14        try {
15            String message = "This is the message i want send";
16            byte[] messageByte = message.getBytes();
17            //get the keystore instance, do we can get a key from it
18            keyStore.load(null);
19            SecretKey secretKey = (SecretKey) keyStore.getKey(KEY_STORE_NAME, null);
20            //get the cipher to use this secret key to encrypt the message
21            if (cipher != null) {
22                cipher.init(Cipher.ENCRYPT_MODE, secretKey);
23                cipher.doFinal(messageByte);
24            }
25
26
27        } catch (CertificateException e) {
28            e.printStackTrace();
29        } catch (NoSuchAlgorithmException e) {
30            e.printStackTrace();
31        } catch (IOException e) {
32            e.printStackTrace();
33        } catch (UnrecoverableKeyException e) {
34            e.printStackTrace();
35        } catch (KeyStoreException e) {
36            e.printStackTrace();
37        } catch (InvalidKeyException e) {
38            e.printStackTrace();
39        } catch (BadPaddingException e) {
40            e.printStackTrace();
41        } catch (IllegalBlockSizeException e) {
42            e.printStackTrace();
43        }
44        return cipher;