微信退款異步通知密文解碼

一、通知接口

我們對一筆微信退款是否成功除了查詢以外，還有最保險的一種模式就是對通知的解析，但是微信退款通知居然是密文模式的。


我們要根據他的要求解密出來以後纔可以解析。那麼先拿到通知吧。

二、接收通知

三、解析通知

這裏我就不做詳細的介紹，直貼代碼

public Map<String, String> getRequestParams(HttpServletRequest request, String payType) throws Exception {
        Map<String, String> paramsData = new HashMap<>();
        InputStream inputStream = request.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
        final StringBuffer sb = new StringBuffer();
        String line = null;
        try {
             while ((line = bufferedReader.readLine()) != null) {
                 sb.append(line);
             }
        } finally {
             bufferedReader.close();
             inputStream.close();
        }
         paramsData = WXPayUtil.xmlToMap(sb.toString());
         return paramsData;
}

那麼拿到的是接口中的數據了

四、解密數據

直接上代碼

/**
     * AES解密
     *
     * @param base64Data
     * @return
     * @throws Exception
     */
    public static String decryptData(String base64Data, String lowMad5Key) throws Exception {
        SecretKeySpec key = new SecretKeySpec(lowMad5Key.getBytes(), ALGORITHM);
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING);
        cipher.init(Cipher.DECRYPT_MODE, key);
        Base64.Decoder decoder = Base64.getDecoder();
        String newData = new String(decoder.decode(base64Data), "ISO-8859-1");
        return new String(cipher.doFinal(newData.getBytes("ISO-8859-1")), "utf-8");
    }
    /**
     * MD5加密
     *
     * @param data
     * @return
     * @throws Exception
     */
    public static String MD5(String data) throws Exception {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] array = md.digest(data.getBytes("UTF-8"));
        StringBuilder sb = new StringBuilder();
        byte[] var4 = array;
        int var5 = array.length;
        for (int var6 = 0; var6 < var5; ++var6) {
            byte item = var4[var6];
            sb.append(Integer.toHexString(item & 255 | 256).substring(1, 3));
        }
        return sb.toString().toUpperCase();
    }
    //示例:不可以直接用，已經把KEY值修改，需要根據實際進行操作
    public static void main(String[] args) throws Exception {
        String a = "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";
        String ab = AESUtil.decryptData(a, AESUtil.MD5("GXXXXXL1236458sskdjsghxc849728").toLowerCase());
        Map<String, String> xmlMap = WXPayUtil.xmlToMap(ab);
        System.out.println(ab);
        System.out.println(xmlMap.get("out_refund_no"));
    }

解密後：