AuthData is a combination of your payment’s sensitive data mainly: PAN, PIN, Expiry Date, and CVV2. The BouncyCastle library is required for this. Kindly download the appropriate BouncyCastle library for your platform.
You will also be provided with a public key exponent as well as a modulus.
Please contact ipg@interswitchgroup.com for more information.
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String authDataVersion = "1"; String pan = "5060990580000217499"; // Payment Card String expiryDate = "2004"; //Card Expiry date: April (04), 2020 (20) - YYMM String cvv2 = "111"; // Card CVV2 String pin = "1111"; // Card pin String authData = getAuthData(authDataVersion, pan, pin, expiryDate, cvv2); System.out.println("AuthData : " + authData); public static String getAuthData(String version, String pan, String pin, String expiryDate, String cvv2) throws Exception { String authData = ""; String authDataCipher = version + "Z" + pan + "Z" + pin + "Z" + expiryDate + "Z" + cvv2; // The Modulus and Public Exponent will be supplied by Interswitch. please ask for one String modulus = "XXXXXXX"; String publicExponent = "XXXXXXX"; Security.addProvider(new BouncyCastleProvider()); RSAPublicKeySpec publicKeyspec = new RSAPublicKeySpec(new BigInteger(modulus, 16), new BigInteger(publicExponent, 16)); KeyFactory factory = KeyFactory.getInstance("RSA"); //, "JHBCI"); PublicKey publicKey = factory.generatePublic(publicKeyspec); Cipher encryptCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC"); encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey); byte[] authDataBytes = encryptCipher.doFinal(authDataCipher.getBytes("UTF8")); authData = Base64.getEncoder().encodeToString(authDataBytes).replaceAll("\\r|\\n", ""); return authData; } |