Dears,

I'm implementing a case that I need to encrypt a value. Using x509 key so to use this key,

• Firstly we have to decode it base64.
• Then encrypt the decoded key using RSA algorithm.
• Thereby Generate the Public Key.

The attached java code implements this requirements perfectly, However, I am not able to implement it correctly on the DP.
Your help is highly appreciated to do this on the Data Power.

public static String loadPublicKey(String pubKey) {

byte[] publicKeyBytes = Base64.decodeBase64(pubKey);
PublicKey publicKey = null;
KeyFactor publicKeyFactory;

try {
publicKeyFactory = KeyFactory.getInstance("RSA");
EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes)
publicKey = publicKeyFactory.generatePublic(publicKeySpec)
} catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
e.printStackTrace
}

return publicKey
}



public static String encode(String toEncode, String publicKeyBase64) {
PublicKey publicKey = loadPublicKey(publicKeyBase64);
byte[] bytes = null;

try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
bytes = cipher.doFinal(toEncode.getBytes(StrndardCharsets.UTF_8));
} catch (InvalidKeySpecException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException e) {
e.printStackTrace
}

return new String(Base64.encodeBase64(bytes))
}

Note:

After trying to decode the key using xslt here is the error shows 'Valid base64 passed to dp:decode resulted in non UTF8'.

Are you trying to create public key at run time?  Could you paste an example of the payload with the field that you're trying to encrypt ? 

public static String loadPublicKey(String pubKey) {byte[] publicKeyBytes = Base64.decodeBase64(pubKey);PublicKey publicKey = null;KeyFactor publicKeyFactory;try {publicKeyFactory = KeyFactory.getInstance("RSA");EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes)publicKey = publicKeyFactory.generatePublic(publicKeySpec)} catch (NoSuchAlgorithmException | InvalidKeySpecException e) {e.printStackTrace}return publicKey}public static String encode(String toEncode, String publicKeyBase64) {PublicKey publicKey = loadPublicKey(publicKeyBase64);byte[] bytes = null;try {Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE, publicKey);bytes = cipher.doFinal(toEncode.getBytes(StrndardCharsets.UTF_8));} catch (InvalidKeySpecException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException e) {e.printStackTrace}return new String(Base64.encodeBase64(bytes))}