java - 结帐芬兰 PSP API Java 实现

Question

我正在尝试将芬兰的结帐 API 集成到我的项目中。它总是给我 401（即，根据 API，我的 Hmac 计算失败）。她是他们使用 nodejs 和 php 计算 Hmac 的 api 的链接。 https://checkoutfinland.github.io/psp-api/#/examples

任何人都可以帮助我在我的 java 代码中出错的地方。这是我的代码：

// Make sure all check-out headers are in alphabetical order and
    // all header keys must be in lower case
    // if request contains body - it should be valid JSON and content-type header should be included
    Map<String, String> headersMap = new TreeMap<>();
    headersMap.put("checkout-account", "375917");
    headersMap.put("checkout-algorithm", "sha256");
    headersMap.put("checkout-method", "POST");
    headersMap.put("checkout-nonce", String.valueOf(UUID.randomUUID()));  // unique identifier for this request
    headersMap.put("checkout-timestamp", ZonedDateTime.now( ZoneOffset.UTC ).format( DateTimeFormatter.ISO_INSTANT )); // ISO 8601 format date time

    /**
     * All API calls need to be signed using HMAC and SHA-256 or SHA-512
     */
    String headers[] = new String[headersMap.size()];

    int index = 0;
    for(Map.Entry<String, String> headersEntry: headersMap.entrySet()){
        headers[index++] = headersEntry.getKey()+":"+headersEntry.getValue();
    }

    Map<String, Object> requestBody = new HashMap<>();
    requestBody.put("stamp", "29858472952");
    requestBody.put("reference", "9187445");
    requestBody.put("amount", 1500);
    requestBody.put("currency", "EUR");
    requestBody.put("language", "FI");
    List<List<Map<String, Object>>> itemsList = new ArrayList<>();
    List<Map<String, Object>> item = new ArrayList<>();
    Map<String, Object> itemObj = new HashMap<>();
    itemObj.put("unitPrice", 1500);
    itemObj.put("units",1);
    itemObj.put("vatPercentage", 5);
    itemObj.put("productCode", "#1234");
    itemObj.put("deliveryDate", "2018-09-01");
    item.add(itemObj);
    itemsList.add(item);
    requestBody.put("items", itemsList);
    Map<String, Object> customer = new HashMap<>();
    customer.put("email", "[e-mail]");
    requestBody.put("customer", customer);
    Map<String, Object> redirectUrls = new HashMap<>();
    redirectUrls.put("success","example.com");
    redirectUrls.put("cancel","example.com");
    requestBody.put("redirectUrls",redirectUrls);

    String body = new ObjectMapper().writeValueAsString(requestBody);

    String data = String.join("\n", ArrayUtils.addAll(headers, body));

    String hmacSha256Hash = calculateHmacSha256("SAIPPUAKAUPPIAS", data);

    if(hmacSha256Hash != null){
        headersMap.put("content-type", "application/json; charset=utf-8");
        headersMap.put("signature", hmacSha256Hash);

        // Make network call checkout api
     }

Hmac计算方法：

private String calculateHmacSha256(String key, String data){
    String resultHash = null;
    try {
        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"),"HmacSHA256");
        sha256_HMAC.init(secret_key);

        resultHash = Hex.encodeHexString(sha256_HMAC.doFinal(data.getBytes()));

    } catch (Exception e) {
        System.out.println("Error calculating HmacSHA256 hash for data data"+  e);
    }

    return resultHash;
}

我实现它与他们在示例中的相同。

标签： javacheckout