問題
使用 HTTP Client 請求 HTTPS 的 API 時出現 The certificate cannot be verified up to a trusted certification authority
異常,並且證書已經傳入。
下麵就是問題程式碼:
public class Program
{
public static void Main(string[] args)
{
var url = @"https://xxx.xxx.xxx.xxx:xxxx/xxx-web/services/xxxx?wsdl";
var handler = new HttpClientHandler
{
ClientCertificateOptions = ClientCertificateOption.Manual,
ClientCertificates =
{
new X509Certificate2(@"E:\cert\rootTrust.cer","11111111"),
new X509Certificate2(@"E:\cert\middleTrust.cer","11111111"),
new X509Certificate2(@"E:\cert\wskey.pfx","ws654321")
}
};
var webRequest = new HttpClient(handler);
var result = webRequest.GetStringAsync(url).GetAwaiter().GetResult();
Console.WriteLine(result);
}
}
原因
因為在發出 HTTPS 請求的時候,HttpClient
都會檢查 SSL 證書是否合法。如果不合法的話,就會導致丟擲異常資訊,而對方給出的證書是自簽發的測試介面的證書,所以不是一個合法的 SSL 證書。
解決
在 HttpClientHandler
當中會有一個 ServerCertificateCustomValidationCallback
事件,該事件用於判定證書驗證是否透過。我們可以掛接該事件,然後邏輯編寫為直接傳回 true
結果,這樣就會忽略掉證書異常的情況。
最新的程式碼如下:
public class Program
{
public static void Main(string[] args)
{
var url = @"https://xxx.xxx.xxx.xxx:xxxx/xxx-web/services/xxxx?wsdl";
var handler = new HttpClientHandler
{
ServerCertificateCustomValidationCallback = (message, certificate2, arg3, arg4) => true,
ClientCertificateOptions = ClientCertificateOption.Manual,
ClientCertificates =
{
new X509Certificate2(@"E:\cert\rootTrust.cer","11111111"),
new X509Certificate2(@"E:\cert\middleTrust.cer","11111111"),
new X509Certificate2(@"E:\cert\wskey.pfx","ws654321")
}
};
var webRequest = new HttpClient(handler);
var result = webRequest.GetStringAsync(url).GetAwaiter().GetResult();
Console.WriteLine("xx");
}
}
原文地址:https://www.cnblogs.com/myzony/p/10482113.html