/*
* #%L
* BroadleafCommerce Common Libraries
* %%
* Copyright (C) 2009 - 2013 Broadleaf Commerce
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
package org.broadleafcommerce.common.payment.service;
import org.apache.commons.codec.binary.Base64;
import org.springframework.stereotype.Service;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
/**
* <p>This default implementation encodes the seal using a URL-Safe Base64 encoder
* and 'HmacSHA1'</p>
*
* @author Elbert Bautista (elbertbautista)
*/
@Service("blPaymentGatewayTamperProofSealService")
public class PaymentGatewayTamperProofSealServiceImpl implements PaymentGatewayTamperProofSealService {
@Override
public String createTamperProofSeal(String secretKey, String customerId, String orderId)
throws NoSuchAlgorithmException, InvalidKeyException {
//Create a URL-Safe Base64 encoder as some of these may get passed back as URL GET parameters
Base64 encoder = new Base64(true);
Mac sha1Mac = Mac.getInstance("HmacSHA1");
SecretKeySpec publicKeySpec = new SecretKeySpec(secretKey.getBytes(), "HmacSHA1");
sha1Mac.init(publicKeySpec);
String customerOrderString = customerId + orderId;
byte[] publicBytes = sha1Mac.doFinal(customerOrderString.getBytes());
String publicDigest = encoder.encodeToString(publicBytes);
return publicDigest.replaceAll("\\r|\\n", "");
}
@Override
public Boolean verifySeal(String seal, String secretKey, String customerId, String orderId)
throws InvalidKeyException, NoSuchAlgorithmException {
Boolean valid = false;
String constructedSeal = createTamperProofSeal(secretKey, customerId, orderId);
if (seal != null && seal.equals(constructedSeal)) {
valid = true;
}
return valid;
}
}