【Azure App Service】.NET代码实验App Service应用中获取TLS/SSL 证书 (App Service Linux/Linux Container)

技术分享 2年前 (2024-06-02) 0 999+

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在前一篇文章中，我们是把.NET 8应用读取SSL证书(X509)示例部署在App Service Windows环境中，那么如果部署在Linux环境，以及Linux Container中呢？

根据前文中的第一种方法，直接在把证书文件包含在源文件中，通过相对路径读取证书文件的方式，经测试，可以正常工作。

但是，对于第二种“通过指纹在系统证书库中查找证书 ”的方式，在Linux系统中，是不能使用 X509Store(StoreName.My, StoreLocation.CurrentUser) 中查找的方式。

经过测试验证，在App Service Linux( 包含Linux Container)证书页面上传的证书后，系统会把证书保存为文件。存储在 /var/ssl/ 文件夹中，可以通过ssh 方式查看：

进入App Service Kudu(高级工具）页面: https://<yourwebappname>.scm.chinacloudsites.cn/webssh/host
点击SSH目录，输入cd 目录命令： cd /var/ssl/private 后，列举全部文件: ls -ll

在.NET 8代码中的正确读取私有证书 (.pfx)的代码示例：

    public static string FindPfxbyThubmprintinLinux(string thumbprint)     {         if (string.IsNullOrEmpty(thumbprint))             return $"Certificate with thumbprint {thumbprint} was not found";          string finalPath = $"/var/ssl/private/{thumbprint}.p12";         var bytes2 = File.ReadAllBytes(finalPath);         var cert = new X509Certificate2(bytes2);         return cert.ToString();      }

注意：

WEBSITE_LOAD_CERTIFICATES 配置不可少
门户上的证书添加后，需要重启站点，等待实例中出现证书文件。(通常在15分钟左右后才能在目录中看见 thumbprint.p12文件)

附录：示例代码(.NET 8.0 顶级语句 program.cs)

using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.FileProviders; using System.Security.Cryptography.X509Certificates;  var builder = WebApplication.CreateBuilder(args);  // Add services to the container.  var app = builder.Build();  // Configure the HTTP request pipeline.  app.UseHttpsRedirection();  app.UseStaticFiles(new StaticFileOptions() {     FileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), "Images")),     RequestPath = new PathString("/Images") });    app.MapGet("/loadpfxbyname", ([FromQuery(Name = "name")] string filename, [FromQuery(Name = "pwd")] string pwd) => {     var content = pfxTesting.LoadPfx(filename, pwd);     return content; });  app.MapGet("/loadpfx/{pwd}", (string pwd) => {      var content = pfxTesting.LoadPfx(null, pwd);     return content; });  app.MapGet("/findpfx/{certThumbprint}", (string certThumbprint) => {      var content = pfxTesting.FindPfx(certThumbprint);     return content; });    app.Run();  class pfxTesting {     public static string LoadPfx(string? filename, string password = "")     {         try         {             if (filename == null) filename = "contoso.com.pfx";              var bytes = File.ReadAllBytes(filename);             var cert = new X509Certificate2(bytes, password);              return cert.ToString();         }         catch (Exception ex)         {             return ex.Message;         }     }      public static string FindPfx(string certThumbprint = "")     {         try         {             bool validOnly = false;             using (X509Store certStore = new X509Store(StoreName.My, StoreLocation.CurrentUser))             {                 certStore.Open(OpenFlags.ReadOnly);                  X509Certificate2Collection certCollection = certStore.Certificates.Find(                                             X509FindType.FindByThumbprint,                                             // Replace below with your certificate's thumbprint                                             certThumbprint,                                             validOnly);                 // Get the first cert with the thumbprint                 X509Certificate2 cert = certCollection.OfType<X509Certificate2>().FirstOrDefault();                  if (cert is null)                     return FindPfxbyThubmprintinLinux(certThumbprint);                     //throw new Exception($"Certificate with thumbprint {certThumbprint} was not found");                  return cert.ToString();              }         }         catch (Exception ex) { return ex.Message; }     }      public static string FindPfxbyThubmprintinLinux(string thumbprint)     {         if (string.IsNullOrEmpty(thumbprint))             return $"Certificate with thumbprint {thumbprint} was not found";          string finalPath = $"/var/ssl/private/{thumbprint}.p12";         var bytes2 = File.ReadAllBytes(finalPath);         var cert = new X509Certificate2(bytes2);         return cert.ToString();      } }