相关疑难解决方法(0)

我试图在iOS 6教程:第1/2部分中运行Apple推送通知服务中的Ray Wenderlich教程.

我在本地目录中创建了AppID和SSL证书以及密钥和PEM文件.之后,我到了测试证书是否有效的步骤,我从这个本地目录调用了以下命令:

$ openssl s_client -connect gateway.sandbox.push.apple.com:2195 
-cert PushChatCert.pem -key PushChatKey.pem

这产生了很多输出.在输出的中间是以下内容:

verify error:num=20:unable to get local issuer certificate
verify return:0

这是一个错误,还是一个错误的测试？如果是错误,原因是什么或者您建议解决什么？

这是完整的输出(减去证书数据):

Enter pass phrase for PushChatKey.pem:    
CONNECTED(00000003)
depth=1 /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
 0 s:/C=US/ST=California/L=Cupertino/O=Apple Inc./OU=iTMS Engineering/CN=gateway.sandbox.push.apple.com
   i:/C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C
 1 s:/C=US/O=Entrust, …

我在使用 http 客户端的自定义证书进行 HTTP 调用时遇到问题。例子：

try
{
    var handler = new HttpClientHandler();
    //download certificate from https://api.alfabank.ru/sites/api.alfabank.ru/files/u1/apidevelopers.cert.pem
    var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "apidevelopers.cert.pem");

    handler.ClientCertificates.Add(new X509Certificate2(path));

    using (var httpClient = new HttpClient(handler))
    {
        var response =
            await httpClient.GetAsync(
                "https://apiws.alfabank.ru");

        Console.WriteLine(response.StatusCode);
    }
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
    Console.WriteLine(ex.StackTrace);

    if (ex.InnerException != null)
    {
        Console.WriteLine(ex.InnerException.Message);
        Console.WriteLine(ex.InnerException.StackTrace);
    }
}

发生的错误是：

System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException:     Authentication failed, see inner exception. ---> System.ComponentModel.Win32Exception: Unexpected message received or incorrect …