??? TLS ?? ??

TLS? ?? ???? ?????? ??? ? ????? ?? ???? ??? ?? TLS ??? ???? ?? ??? ??? ????. ? ????? ??? ????? ?? ? ??? ???? ??? ?????.

.NET Reflection API ??

Framework 4.7 ???? ???? .NET ??????? ?? ?? ??? ????? ???? ?? TlsStream? ????? ??? TLS ????? ?????.

using System.Net;
using System.Reflection;
using System.Security.Authentication;

// 獲取與網(wǎng)絡(luò)請(qǐng)求關(guān)聯(lián)的TLS流
using (var requestStream = request.GetRequestStream())
{
    // 利用反射訪問(wèn)TLS流的屬性
    var tlsStream = requestStream.GetType()
        .GetProperty("Connection", BindingFlags.Instance | BindingFlags.NonPublic)
        .GetValue(requestStream);
    var tlsState = tlsStream.GetType()
        .GetProperty("NetworkStream", BindingFlags.Instance | BindingFlags.NonPublic)
        .GetValue(tlsStream);
    var sslProtocol = (SslProtocols)tlsState.GetType()
        .GetProperty("SslProtocol", BindingFlags.Instance | BindingFlags.NonPublic)
        .GetValue(tlsState);

    // 處理協(xié)商的TLS協(xié)議（例如，日志記錄或顯示）
}

?? ??? ?? ?? ??

? ?? ?? ??? TLS ??? ??? ? ???? ServerCertificateValidationCallback? ???? ????. ? ??? ???? ??? ??? ????.

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

// 設(shè)置ServerCertificateValidationCallback
ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, errors) => {
    // 獲取TLS協(xié)議版本
    var sslProtocol = ((SslStream)sender).SslProtocol;

    // 處理協(xié)商的TLS協(xié)議（例如，日志記錄或顯示）
    return true;  // 回調(diào)也可以用于證書(shū)驗(yàn)證，此處作為一個(gè)示例顯示。
};

.NET ?? DLL ??

????? ?? ???? ??? ????? ?? secur32.dll? QueryContextAttributesW ???? ???? ?? ??? ????. ? ??? ???? ??? ?? ??? ?? ??? ??? ??? ? ????.

using System;
using System.Runtime.InteropServices;

[DllImport("secur32.dll", CharSet = CharSet.Auto, ExactSpelling = true, SetLastError = false)]
private static extern int QueryContextAttributesW(
    IntPtr contextHandle,
    ContextAttribute attribute,
    ref SecPkgContext_ConnectionInfo connectionInfo);

public enum ContextAttribute
{
    // 獲取TLS協(xié)議版本
    SecPkgContext_ConnectionInfo = 0x9
}

public struct SecPkgContext_ConnectionInfo
{
    public SchProtocols dwProtocol;
    // 其他屬性也可以用于獲取有關(guān)密碼和哈希算法的信息
}

??: ? ??? ????? ??? ?? ? ??? ????? ??? ? ???? ?????.

??? ??? ?????? ???? HttpWebRequest ? TcpClient ??? ?? ??? TLS ??? ???? ??? ? ??? ?? ??? ??? ??? ? ????.

? ??? .NET ???????? ??? TLS ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!