从httprequest C#读取客户端证书

时间:2009-05-15 06:02:42

标签: c# asp.net security x509certificate2

我正在尝试使用Request.ClientCertificate读取X509证书,但没有返回任何内容。证书肯定会附加到请求中,因为我可以从发送请求的页面获取证书信息。

我试过从几个不同的地方读取证书,但似乎无法让它工作。

我从this KB Article的代码开始。在请求的页面中,我尝试打印出有关证书的一些信息,但响应中没有返回任何内容。

这是在IIS 5.1上运行,并且通信是通过SSL进行的。这必须使用.Net框架的第2版

来完成

为什么证书似乎消失了?

4 个答案:

答案 0 :(得分:11)

我前后写了一个标识网页,寻找客户端证书,如果找到则会显示证书信息。我相信这就是你要找的......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>

答案 1 :(得分:2)

我不确定您需要什么样的客户端证书,但是如果您将其用于自己的自定义身份验证或授权,则可能需要考虑使用Web服务器的安全基础结构而不是实现自己的安全基础结构。例如,您可以将IIS配置为需要客户端证书,将证书映射到用户帐户,以及使用基于Windows的身份验证。当然,这不一定适用于您的问题域。

答案 2 :(得分:1)

好的,目前还不完全清楚,但是你有一个网站要求客户使用证书进行身份验证?因为这就是Request.ClientCertificate属性的用途。

我这样说是因为你的问题有些奇怪。

“我可以从发送请求的页面获取证书信息。”

一般来说,页面并不真正发送客户端的请求。

要获得服务器证书,您可以打开X509Store并筛选证书以找到您需要的CN。

答案 3 :(得分:0)

您必须将本地IIS配置为接受(或要求)客户端证书。