我正在尝试使用 Request.ClientCertificate 读取 X509 证书，但未返回任何内容。证书肯定是附加到请求中的，因为我可以从发送请求的页面中获取证书信息。
我尝试从几个不同的地方读取证书，但似乎无法正常工作。
我从 this KB Article 的代码开始.在请求的页面中，我试图打印出一些关于证书的信息，但响应中没有返回任何内容。
这在 IIS 5.1 上运行，并且通过 SSL 进行通信。这必须使用 .Net 框架的版本 2 来完成
为什么证书好像消失了？
最佳答案
我前一段时间写了一个识别网页，寻找客户端证书，如果找到就会显示证书信息。我相信这就是您正在寻找的...这是页面:
<%@ Page Language="C#" Trace="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Import Namespace="System.Security.Cryptography.X509Certificates" %>
<%@ Import Namespace="System.Security.Cryptography" %>
<script runat="server">
//protected void Page_Load(object sender, EventArgs e)
//{ }
void LoadCertInfo()
{
string para = "<div style='margin: 10px 0 0 0; font-weight: bold'>{0}</div>";
string subpara = "<div style='margin-left: 15px; font-size: 90%'>{0}</div>";
if (Page.Request.ClientCertificate.IsPresent)
{
Response.Write("<hr /><div style='width: 500px; margin: 20px auto'>");
Response.Write("<h3 style='width: 500px; margin: 20px auto'>Client Certificate Information</h3>");
try
{
X509Certificate2 x509Cert2 = new X509Certificate2(Page.Request.ClientCertificate.Certificate);
Response.Write(string.Format(para, "Issued To:"));
Response.Write(string.Format(subpara, x509Cert2.Subject));
Response.Write(string.Format(para, "Issued By:"));
Response.Write(string.Format(subpara, x509Cert2.Issuer));
Response.Write(string.Format(para, "Friendly Name:"));
Response.Write(string.Format(subpara, string.IsNullOrEmpty(x509Cert2.FriendlyName) ? "(None Specified)" : x509Cert2.FriendlyName));
Response.Write(string.Format(para, "Valid Dates:"));
Response.Write(string.Format(subpara, "From: " + x509Cert2.GetEffectiveDateString()));
Response.Write(string.Format(subpara, "To: " + x509Cert2.GetExpirationDateString()));
Response.Write(string.Format(para, "Thumbprint:"));
Response.Write(string.Format(subpara, x509Cert2.Thumbprint));
//Response.Write(string.Format(para, "Public Key:"));
//Response.Write(string.Format(subpara, x509Cert2.GetPublicKeyString()));
#region EKU Section - Retrieve EKU info and write out each OID
X509EnhancedKeyUsageExtension ekuExtension = (X509EnhancedKeyUsageExtension)x509Cert2.Extensions["Enhanced Key Usage"];
if (ekuExtension != null)
{
Response.Write(string.Format(para, "Enhanced Key Usages (" + ekuExtension.EnhancedKeyUsages.Count.ToString() + " found)"));
OidCollection ekuOids = ekuExtension.EnhancedKeyUsages;
foreach (Oid ekuOid in ekuOids)
Response.Write(string.Format(subpara, ekuOid.FriendlyName + " (OID: " + ekuOid.Value + ")"));
}
else
{
Response.Write(string.Format(para, "No EKU Section Data"));
}
#endregion // EKU Section
#region Subject Alternative Name Section
X509Extension sanExtension = (X509Extension)x509Cert2.Extensions["Subject Alternative Name"];
if (sanExtension != null)
{
Response.Write(string.Format(para, "Subject Alternative Name:"));
Response.Write(string.Format(subpara, sanExtension.Format(true)));
}
else
{
Response.Write(string.Format(para, "No Subject Alternative Name Data"));
}
#endregion // Subject Alternative Name Section
#region Certificate Policies Section
X509Extension policyExtension = (X509Extension)x509Cert2.Extensions["Certificate Policies"];
if (policyExtension != null)
{
Response.Write(string.Format(para, "Certificate Policies:"));
Response.Write(string.Format(subpara, policyExtension.Format(true)));
}
else
{
Response.Write(string.Format(para, "No Certificate Policies Data"));
}
#endregion //Certificate Policies Section
// Example on how to enumerate all extensions
//foreach (X509Extension extension in x509Cert2.Extensions)
// Response.Write(string.Format(para, extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")"));
}
catch (Exception ex)
{
Response.Write(string.Format(para, "An error occured:"));
Response.Write(string.Format(subpara, ex.Message));
Response.Write(string.Format(subpara, ex.StackTrace));
}
finally
{
Response.Write("</div>");
}
}
}
</script>
<html>
<head runat="server">
<title><% Page.Response.Write(System.Environment.MachineName); %></title>
</head>
<body>
<% LoadCertInfo(); %>
</body>
</html>
关于c# - 从 httprequest C# 读取客户端证书，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/867171/