Requirement:- We had a requirement where we have to encrypt a single field in message mapping using a key and cipher. The key is 128 bit key which willb be hard coded and same key we have used to decrypt the encrypted text.
Solution:- As a solution for this problem, we have written a java code using Base64 algorithm.
Libraries that we have included were:-
Base64Encoder and Base64decoder classes are used to encode and decode the field.
Code for Encryption:-
public String Encryption(String CreditCard_No, Container container) throws StreamTransformationException{
String key = "############"; // 128 bit key
BASE64Encoder encoder = new BASE64Encoder();
String encoded="";
try {
// Create key and cipher
Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES");
// encrypt the CreditCard_No
cipher.init(Cipher.ENCRYPT_MODE, aesKey);
byte[] encrypted = cipher.doFinal(CreditCard_No.getBytes());
encoded= encoder.encode(encrypted);
/return encrypted text
return encoded;
}
catch(Exception e) {
e.printStackTrace();
return "error during encryption"+e.toString();
}
}
Code for Decryption:-
String Encryption(String encryptedValue, Container container) throws StreamTransformationException{
String key = "############"; // any 128 bit key can be given
BASE64Decoder decoder = new BASE64Decoder();
try {
// Create key and cipher
Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES");
// decrypt the text
cipher.init(Cipher.DECRYPT_MODE, aesKey);
byte[] encryptedbyte= decoder.decodeBuffer(encryptedValue);
byte[] decryptedValue=cipher.doFinal(encryptedbyte);
//Converting the input Strings to bytes so that it can be decrypted
String decrypted = new String(decryptedValue,"UTF-8");
return decrypted;
}
catch(Exception e) {
e.printStackTrace();
return "error during decryption" + e.toString();
}
}
Mapping output:-
Encryption-
Decryption:-
