C#、VB.NET使用HttpWebRequest訪問https地址(SSL)的實現

用httpwebrequest訪問一個SSL類型的地址 https://xxxx 時，報錯 “未能為 SSL/TLS 安全通道建立信任關係(Could not establish trust relationship for the SSL/TLS secure channel)”

查了下MSDN，找到瞭解決方法，SSL網站，串連時需要提供認證，對於非必須提供用戶端認證的情況，只要返回一個安全確認即可。但是此方法的實現，在.NET 1.1 和 .NET 2.0 下是不同的，下面寫出2個framework版本下的實現方法：

使用的命名空間：

using System.Net;using System.Net.Security;using System.Security.Authentication;using System.Security.Cryptography.X509Certificates;

.Net 2.0

public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors){    //直接確認，否則打不開    return true;}    private void button1_Click(object sender, EventArgs e){    ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);    HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("https://zu14.cn/"));    req.Method = "GET";    HttpWebResponse res = (HttpWebResponse)req.GetResponse();    //...正常使用了，和訪問普通的 http:// 地址一樣了

 

 .Net 1.1

internal class AcceptAllCertificatePolicy : ICertificatePolicy{    public AcceptAllCertificatePolicy()    {    }    public bool CheckValidationResult(ServicePoint sPoint, System.Security.Cryptography.X509Certificates.X509Certificate cert, WebRequest wRequest, int certProb)    {        //直接確認        return true;    }}    private void button1_Click(object sender, EventArgs e){    ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();    HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("https://zu14.cn/"));    req.Method = "GET";    HttpWebResponse res = (HttpWebResponse)req.GetResponse();    //...正常使用了，和訪問普通的 http:// 地址一樣了