请求已中止:无法创建SSL/TLS安全通道沙箱帐户

Question

它在一周之前运作良好,但现在它显示以下错误.我尝试过以下的东西,但没有用.

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

所以建议我可能的解决方案

public string HttpCall(string NvpRequest) //CallNvpServer
    {
        string url = pendpointurl;

        //To Add the credentials from the profile
        string strPost = NvpRequest + "&" + buildCredentialsNVPString();
        strPost = strPost + "&BUTTONSOURCE=" + HttpUtility.UrlEncode(BNCode);

        ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
        // allows for validation of SSL conversations
        ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };


        HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
        objRequest.Timeout = Timeout;
        objRequest.Method = "POST";
        objRequest.ContentLength = strPost.Length;

        try
        {
            using (StreamWriter myWriter = new StreamWriter(objRequest.GetRequestStream()))
            {
                myWriter.Write(strPost);
            }
        }
        catch (Exception e)
        {
            /*
            if (log.IsFatalEnabled)
            {
                log.Fatal(e.Message, this);
            }*/
        }

        //Retrieve the Response returned from the NVP API call to PayPal
        HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
        string result;
        using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
        {
            result = sr.ReadToEnd();
        }

        //Logging the response of the transaction
        /* if (log.IsInfoEnabled)
         {
             log.Info("Result :" +
                       " Elapsed Time : " + (DateTime.Now - startDate).Milliseconds + " ms" +
                      result);
         }
         */
        return result;
    }

Answer 1

我刚刚在我的测试环境中遇到了同样的问题(幸运的是我的实时付款正在进行中).我修改了它:

public PayPalAPI(string specialAccount = "")
{
    System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls;

至

public PayPalAPI(string specialAccount = "")
{
    System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

他们不久前禁用了对SSL3的支持:https://www.paypal.com/uk/webapps/mpp/ssl-security-update,具体说明

确保使用TLS 1.0或1.2连接到PayPal端点(并非所有API端点当前都支持TLS 1.1).

他们的最新更新(来自@awesome的评论更新的thx)声明:

PayPal正在更新其服务,要求所有HTTPS连接都使用TLS 1.2.此时,PayPal还需要HTTP/1.1用于所有连接... 为避免服务中断,您必须在2016年6月17日之前验证您的系统是否已准备好进行此更改

Answer 2

确实更改SecurityProtocolType.Tls可以 解决问题,如果您在VS中使用低于4.5的框架而无法更改它,则必须将VS升级到最高版本2012/2013/2015以进行更改.

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12 ;

Answer 3

将以下代码添加到global.asax或在调用(HttpWebRequest)WebRequest.Create(url)之前;

protected void Application_Start()
{
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
    // ...
}

这是因为PayPal正在将其加密更改为TLS而不是SSL.这已在Sandbox环境中更新,但尚未在实时更新.

阅读更多:https: //devblog.paypal.com/upcoming-security-changes-notice/