KTkC9Z3x

1	@SuppressWarnings("unused")
2	class PaymentJSRequest implements Serializable {
3		private static final long serialVersionUID = -5700536203930375150L;
4		private final String clientId;
5		private final String merchantId;
6		private final String merchantKey;
7		private final String requestType;
8		private final String orderNumber;
9		private final String amount;
10		private final transient IvParameterSpec iv;
11		private final String salt;
12
13		public PaymentJSRequest(String amount, String orderNumber) throws NoSuchAlgorithmException {
14			clientId = configuration.getSagepayApplicationId();
15			merchantId = configuration.getSagepayMerchantId();
16			merchantKey = configuration.getSagepayMerchantKey();
17			requestType = "payment";
18			this.orderNumber = orderNumber;
19			this.amount = amount;
20			SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
21			byte[] ivBytes = new byte[16];
22			random.nextBytes(ivBytes);
23			iv = new IvParameterSpec(ivBytes);
24			salt = Base64.encodeBase64String(Hex.encodeHexString(iv.getIV()).getBytes());
25		}
26
27		public String toAuthKey() throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException {
28			KeySpec keySpec = new PBEKeySpec(merchantKey.toCharArray(), salt.getBytes(), 1500, 32 * Byte.SIZE);
29			SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
30			SecretKey secretKey = secretKeyFactory.generateSecret(keySpec);
31			Key aesKey = new SecretKeySpec(secretKey.getEncoded(), "AES");
32			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
33			cipher.init(Cipher.ENCRYPT_MODE, aesKey, iv);
34			String jsonString = new Gson().toJson(this);
35			return Base64.encodeBase64String(cipher.doFinal(jsonString.getBytes()));
36		}
37
38		public String getSalt() {
39			return salt;
40		}
41	}