我的服务提供商网站为什么在我点击登录按钮时会抛出这个错误?

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英文:

Why is my service provider web app throwing this error when I click the login button?

问题

我正在构建一个 .Net Core Web 应用程序,它将作为服务提供商,并使用单点登录 (SSO) 通过身份提供者来登录用户。

当我加载这个 Web 应用程序并点击 "登录" 按钮时,我遇到了错误。

在我的 appsettings.json 文件中,我有以下内容:

"Saml2": {
    "zau_idpMetadata": "https://saml.zau.edu/zau_idp/shibboleth",
    "Issuer": "UniversityComms",
    "SingleSignOnDestination": "https://saml.zau.edu/zau_idp/profile/SSO",
    "SingleLogoutDestination": "https://saml.zau.edu/zau_idp/profile/Logout",
    "CertificateValidationMode": "None",
    // "CertificateValidationMode": "ChainTrust",
    "RevocationMode": "NoCheck"
}

您可以看到我已经定义了 SingleLogoutDestination

而且在我的 program.cs 文件中有以下内容:

builder.Services.Configure<Saml2Configuration>(saml2Configuration =>
{
    saml2Configuration.AllowedAudienceUris.Add(saml2Configuration.Issuer);

    var entityDescriptor = new EntityDescriptor();
    //entityDescriptor.ReadIdPSsoDescriptorFromUrlAsync(httpClientFactory, new Uri(Configuration["Saml2:IdPMetadata"])).GetAwaiter().GetResult();
    entityDescriptor.ReadIdPSsoDescriptorFromUrl(new Uri(configuration["Saml2:IdPMetadata"]));
    if (entityDescriptor.IdPSsoDescriptor != null)
    {
        saml2Configuration.SingleSignOnDestination = entityDescriptor.IdPSsoDescriptor.SingleSignOnServices.First().Location;
        saml2Configuration.SingleLogoutDestination = entityDescriptor.IdPSsoDescriptor.SingleLogoutServices.First().Location;
        saml2Configuration.SignatureValidationCertificates.AddRange(entityDescriptor.IdPSsoDescriptor.SigningCertificates);
    }
    else
    {
        throw new Exception("IdPSsoDescriptor not loaded from metadata.");
    }
});

builder.Services.AddSaml2();

var app = builder.Build();

然而,当我启动应用程序并尝试通过SSO登录时,我遇到了以下错误:

System.InvalidOperationException: 'Sequence contains no elements'

InvalidOperationException: Sequence contains no elements

完整错误信息如下:

Microsoft.Extensions.Options.OptionsFactory<TOptions>.Create(string name)
Microsoft.Extensions.Options.UnnamedOptionsManager<TOptions>.get_Value()
UniversityComms.Controllers.AuthController..ctor(IOptions<Saml2Configuration> configAccessor) in AuthController.cs

{
    const string relayStateReturnUrl = "ReturnUrl";
    private readonly Saml2Configuration config;
    public AuthController(IOptions<Saml2Configuration> configAccessor)
    {

        config = configAccessor.Value;

    }
    [Route("Login")]
    public IActionResult Login(string? returnUrl = null)
    {
        var binding = new Saml2RedirectBinding();

希望这能帮助您解决问题。如果需要进一步的帮助,请提供更多详细信息。

英文:

I am building a .Net Core Web App that will be a service provider and use SSO to sign in users via an Identity Provider.

When I load the web app, and click Login...I get errors....

I have the following in my appsettings.json file:

  &quot;Saml2&quot;: {
    &quot;zau_idpMetadata&quot;: &quot;https://saml.zau.edu/zau_idp/shibboleth &quot;,
    &quot;Issuer&quot;: &quot;UniversityComms&quot;,
    &quot;SingleSignOnDestination&quot;: &quot;https://saml.zau.edu/zau_idp/profile/SSO&quot;,
    &quot;SingleLogoutDestination&quot;: &quot;https://saml.zau.edu/zau_idp/profile/Logout&quot;,
    &quot;CertificateValidationMode&quot;: &quot;None&quot;,
    //&quot;CertificateValidationMode&quot;: &quot;ChainTrust&quot;,
    &quot;RevocationMode&quot;: &quot;NoCheck&quot;
  }

You can see that I have SingleLogoutDestination defined.

And this is in my program.cs file:

builder.Services.Configure&lt;Saml2Configuration&gt;(saml2Configuration =&gt;
{
    saml2Configuration.AllowedAudienceUris.Add(saml2Configuration.Issuer);

    var entityDescriptor = new EntityDescriptor();
    //entityDescriptor.ReadIdPSsoDescriptorFromUrlAsync(httpClientFactory, new Uri(Configuration[&quot;Saml2:IdPMetadata&quot;])).GetAwaiter().GetResult();
    entityDescriptor.ReadIdPSsoDescriptorFromUrl(new Uri(configuration[&quot;Saml2:IdPMetadata&quot;]));
    if (entityDescriptor.IdPSsoDescriptor != null)
    {
        saml2Configuration.SingleSignOnDestination = entityDescriptor.IdPSsoDescriptor.SingleSignOnServices.First().Location;
        saml2Configuration.SingleLogoutDestination = entityDescriptor.IdPSsoDescriptor.SingleLogoutServices.First().Location;
        saml2Configuration.SignatureValidationCertificates.AddRange(entityDescriptor.IdPSsoDescriptor.SigningCertificates);
    }
    else
    {
        throw new Exception(&quot;IdPSsoDescriptor not loaded from metadata.&quot;);
    }
});

builder.Services.AddSaml2();

var app = builder.Build();

However, when I start the app, and try to login via SSO, I get this error:

System.InvalidOperationException: 'Sequence contains no elements'

Here is the full error:

  InvalidOperationException: Sequence contains no elements

    System.Linq.ThrowHelper.ThrowNoElementsException()
    System.Linq.Enumerable.First&lt;TSource&gt;(IEnumerable&lt;TSource&gt; source)
    Program+&lt;&gt;c__DisplayClass0_0.&lt;&lt;Main&gt;$&gt;b__0(Saml2Configuration saml2Configuration) in Program.cs

        var entityDescriptor = new EntityDescriptor();
        //entityDescriptor.ReadIdPSsoDescriptorFromUrlAsync(httpClientFactory, new Uri(Configuration[&quot;Saml2:IdPMetadata&quot;])).GetAwaiter().GetResult();
        entityDescriptor.ReadIdPSsoDescriptorFromUrl(new Uri(configuration[&quot;Saml2:IdPMetadata&quot;]));
        if (entityDescriptor.IdPSsoDescriptor != null)
        {
            saml2Configuration.SingleSignOnDestination = entityDescriptor.IdPSsoDescriptor.SingleSignOnServices.First().Location;

            saml2Configuration.SingleLogoutDestination = entityDescriptor.IdPSsoDescriptor.SingleLogoutServices.First().Location;

            saml2Configuration.SignatureValidationCertificates.AddRange(entityDescriptor.IdPSsoDescriptor.SigningCertificates);
        }
        else
        {
            throw new Exception(&quot;IdPSsoDescriptor not loaded from metadata.&quot;);
        }

Microsoft.Extensions.Options.OptionsFactory&lt;TOptions&gt;.Create(string name)
Microsoft.Extensions.Options.UnnamedOptionsManager&lt;TOptions&gt;.get_Value()
UniversityComms.Controllers.AuthController..ctor(IOptions&lt;Saml2Configuration&gt; configAccessor) in AuthController.cs

        {
            const string relayStateReturnUrl = &quot;ReturnUrl&quot;;
            private readonly Saml2Configuration config;
            public AuthController(IOptions&lt;Saml2Configuration&gt; configAccessor)
            {

                config = configAccessor.Value;

            }
            [Route(&quot;Login&quot;)]
            public IActionResult Login(string? returnUrl = null)
            {
                var binding = new Saml2RedirectBinding();

lambda_method22(Closure , IServiceProvider , object[] )

答案1

得分: 1

这段代码从IdP元数据端点zau_idpMetadata加载SingleSignOnDestinationSingleLogoutDestination。IdP元数据可能不包含至少一个SingleLogoutServices,因此在.First()上失败。

您可以将单点注销行注释掉,并从配置中加载它。

英文:

The code loads the SingleSignOnDestination and SingleLogoutDestination from the IdP metadata endpoint zau_idpMetadata. The IdP metadata probably do not contain at lease one SingleLogoutServices and therefore it fails on .First().

You can comment out the single logout line and load it from config.

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  • 本文由 发表于 2023年6月15日 02:26:09
  • 转载请务必保留本文链接:https://go.coder-hub.com/76476544.html
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