我有一个简单的web服务调用，由。net (c#) 2.0 Windows应用程序生成，通过Visual Studio生成的web服务代理，用于同样用c#(2.0)编写的web服务。这种方法已经有效了好几年，并且在十几个正在运行的地方继续有效。
在新地点的新安装遇到了问题。当试图调用web服务时，它失败了，消息说:
无法为SSL/TLS安全建立信任关系 通道
web服务的URL使用SSL (https://)——但这已经在许多其他位置工作了很长时间(并继续这样做)。
我该往哪里看?这可能是Windows和。net之间的安全问题，是此安装独有的吗?如果是，我在哪里建立信任关系?我迷路了!
当前回答
我有这个错误运行在一个web服务器的url如下:
a.b.domain.com
但是没有证书，所以我找了一个DNS
a_b.domain.com
在这里提示一下这个解因为它在谷歌中出现在最上面。
其他回答
我在Internet Explorer的. net应用程序中遇到了类似的问题。
我解决了将证书(在我的例子中是VeriSign Class 3证书)添加到受信任编辑器证书的问题。
Go to Internet Options-> Content -> Publishers and import it
您可以通过以下方式导出证书:
Internet Options-> Content -> Certificates -> Intermediate Certification Authorities -> VeriSign Class 3 Public Primary Certification Authority - G5
谢谢
想法(基于过去的痛苦):
do you have DNS and line-of-sight to the server? are you using the correct name from the certificate? is the certificate still valid? is a badly configured load balancer messing things up? does the new server machine have the clock set correctly (i.e. so that the UTC time is correct [ignore local time, it is largely irrelevent]) - this certainly matters for WCF, so may impact regular SOAP? is there a certificate trust chain issue? if you browse from the server to the soap service, can you get SSL? related to the above - has the certificate been installed to the correct location? (you may need a copy in Trusted Root Certification Authorities) is the server's machine-level proxy set correctly? (which different to the user's proxy); see proxycfg for XP / 2003 (not sure about Vista etc)
添加:
ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;}
就在你呼叫服务之前
试试这个:
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
请注意，您必须至少使用4.5 .NET框架
我已经用了一段时间了如果有用的话。
调用方必须显式地请求需要不受信任的认证，并在完成时将回调放回默认状态。
/// <summary>
/// Helper method for returning the content of an external webpage
/// </summary>
/// <param name="url">URL to get</param>
/// <param name="allowUntrustedCertificates">Flags whether to trust untrusted or self-signed certificates</param>
/// <returns>HTML of the webpage</returns>
public static string HttpGet(string url, bool allowUntrustedCertificates = false) {
var oldCallback = ServicePointManager.ServerCertificateValidationCallback;
string webPage = "";
try {
WebRequest req = WebRequest.Create(url);
if (allowUntrustedCertificates) {
// so we can query self-signed certificates
ServicePointManager.ServerCertificateValidationCallback =
((sender, certification, chain, sslPolicyErrors) => true);
}
WebResponse resp = req.GetResponse();
using (StreamReader sr = new StreamReader(resp.GetResponseStream())) {
webPage = sr.ReadToEnd().Trim();
sr.Close();
}
return webPage;
}
catch {
// if the remote site fails to response (or we have no connection)
return null;
}
finally {
ServicePointManager.ServerCertificateValidationCallback = oldCallback;
}
}
