如何使用 .NET 中的 1.2 TLS 版本获得 EWS 服务器的身份验证

Question

首先是 C# 开发的新手，并尝试将身份验证从基本切换到基于 oauth 的身份验证。 但是，在测试下面的代码时，我得到了折旧异常。

＃执行

  // Using Microsoft.Identity.Client
            var cca = ConfidentialClientApplicationBuilder
                .Create(clientId)      //client Id
                .WithClientSecret(clientSecret)
                .WithTenantId(tenantId)
                .Build();
            var ewsScopes = new string[] { "https://outlook.office365.com/.default" };
            try
            {
                // Get token
                var authResult = await cca.AcquireTokenForClient(ewsScopes)
                    .ExecuteAsync();
                this.token = authResult.AccessToken;
            }
            catch (MsalException ex)
            {
                Console.WriteLine($"Error acquiring access token: {ex}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error: {ex}");
            }

＃例外

Microsoft.Identity.Client.MsalServiceException
  HResult=0x80131500
  Message=AADSTS1002016: You are using TLS version 1.0, 1.1 and/or 3DES cipher which are deprecated to improve the security posture of Azure AD. Your TenantID is: 9XXXXXXXXXXXXXXXXXXf. Please refer to https://go.microsoft.com/fwlink/?linkid=2161187 and conduct needed actions to remediate the issue. For further questions, please contact your administrator.
Trace ID: 57531a5a-2797-4f77-bc73-11b1e4355800
Correlation ID: 4295ecdd-7aa1-458f-8e6a-03fda78ec30f
Timestamp: 2022-07-25 03:32:33Z
  Source=Microsoft.Identity.Client

我尝试使用ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls; ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

不幸的是，这不起作用。 如果有人可以导航以解决上述异常，我们将不胜感激。

Answer 1

也许这可以帮助：

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

在代码启动的地方添加这一行（必须尽快到达该行），不要费心添加| SecurityProtocolType.Tls11 | SecurityProtocolType.Tls; | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

它对我有用。