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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Net.Http;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Protocols;
using Microsoft.IdentityModel.Protocols.WsFederation;
namespace Microsoft.AspNetCore.Authentication.WsFederation;
/// <summary>
/// Used to setup defaults for all <see cref="WsFederationOptions"/>.
/// </summary>
public class WsFederationPostConfigureOptions : IPostConfigureOptions<WsFederationOptions>
{
private readonly IDataProtectionProvider _dp;
/// <summary>
///
/// </summary>
/// <param name="dataProtection"></param>
public WsFederationPostConfigureOptions(IDataProtectionProvider dataProtection)
{
_dp = dataProtection;
}
/// <summary>
/// Invoked to post configure a TOptions instance.
/// </summary>
/// <param name="name">The name of the options instance being configured.</param>
/// <param name="options">The options instance to configure.</param>
public void PostConfigure(string? name, WsFederationOptions options)
{
ArgumentNullException.ThrowIfNull(name);
options.DataProtectionProvider = options.DataProtectionProvider ?? _dp;
if (string.IsNullOrEmpty(options.SignOutScheme))
{
options.SignOutScheme = options.SignInScheme;
}
if (options.StateDataFormat == null)
{
var dataProtector = options.DataProtectionProvider.CreateProtector(
typeof(WsFederationHandler).FullName!, name, "v1");
options.StateDataFormat = new PropertiesDataFormat(dataProtector);
}
if (!options.CallbackPath.HasValue && !string.IsNullOrEmpty(options.Wreply) && Uri.TryCreate(options.Wreply, UriKind.Absolute, out var wreply))
{
// Wreply must be a very specific, case sensitive value, so we can't generate it. Instead we generate CallbackPath from it.
options.CallbackPath = PathString.FromUriComponent(wreply);
}
if (string.IsNullOrEmpty(options.TokenValidationParameters.ValidAudience))
{
options.TokenValidationParameters.ValidAudience = options.Wtrealm;
}
if (options.Backchannel == null)
{
options.Backchannel = new HttpClient(options.BackchannelHttpHandler ?? new HttpClientHandler());
options.Backchannel.DefaultRequestHeaders.UserAgent.ParseAdd("Microsoft ASP.NET Core WsFederation handler");
options.Backchannel.Timeout = options.BackchannelTimeout;
options.Backchannel.MaxResponseContentBufferSize = 1024 * 1024 * 10; // 10 MB
}
if (options.ConfigurationManager == null)
{
if (options.Configuration != null)
{
options.ConfigurationManager = new StaticConfigurationManager<WsFederationConfiguration>(options.Configuration);
}
else if (!string.IsNullOrEmpty(options.MetadataAddress))
{
if (options.RequireHttpsMetadata && !options.MetadataAddress.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
{
throw new InvalidOperationException("The MetadataAddress must use HTTPS unless disabled for development by setting RequireHttpsMetadata=false.");
}
options.ConfigurationManager = new ConfigurationManager<WsFederationConfiguration>(options.MetadataAddress, new WsFederationConfigurationRetriever(),
new HttpDocumentRetriever(options.Backchannel) { RequireHttps = options.RequireHttpsMetadata });
}
}
}
}
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