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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.Diagnostics.CodeAnalysis;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection.Extensions;
namespace Microsoft.Extensions.DependencyInjection;
/// <summary>
/// Contains extension methods to <see cref="IServiceCollection"/> for configuring identity services.
/// </summary>
public static class IdentityServiceCollectionExtensions
{
/// <summary>
/// Adds the default identity system configuration for the specified User and Role types.
/// </summary>
/// <typeparam name="TUser">The type representing a User in the system.</typeparam>
/// <typeparam name="TRole">The type representing a Role in the system.</typeparam>
/// <param name="services">The services available in the application.</param>
/// <returns>An <see cref="IdentityBuilder"/> for creating and configuring the identity system.</returns>
public static IdentityBuilder AddIdentity<TUser, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TRole>(
this IServiceCollection services)
where TUser : class
where TRole : class
=> services.AddIdentity<TUser, TRole>(setupAction: null!);
/// <summary>
/// Adds and configures the identity system for the specified User and Role types.
/// </summary>
/// <typeparam name="TUser">The type representing a User in the system.</typeparam>
/// <typeparam name="TRole">The type representing a Role in the system.</typeparam>
/// <param name="services">The services available in the application.</param>
/// <param name="setupAction">An action to configure the <see cref="IdentityOptions"/>.</param>
/// <returns>An <see cref="IdentityBuilder"/> for creating and configuring the identity system.</returns>
public static IdentityBuilder AddIdentity<TUser, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TRole>(
this IServiceCollection services,
Action<IdentityOptions> setupAction)
where TUser : class
where TRole : class
{
// Services used by identity
services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = IdentityConstants.ApplicationScheme;
options.DefaultChallengeScheme = IdentityConstants.ApplicationScheme;
options.DefaultSignInScheme = IdentityConstants.ExternalScheme;
})
.AddCookie(IdentityConstants.ApplicationScheme, o =>
{
o.LoginPath = new PathString("/Account/Login");
o.Events = new CookieAuthenticationEvents
{
OnValidatePrincipal = SecurityStampValidator.ValidatePrincipalAsync
};
})
.AddCookie(IdentityConstants.ExternalScheme, o =>
{
o.Cookie.Name = IdentityConstants.ExternalScheme;
o.ExpireTimeSpan = TimeSpan.FromMinutes(5);
})
.AddCookie(IdentityConstants.TwoFactorRememberMeScheme, o =>
{
o.Cookie.Name = IdentityConstants.TwoFactorRememberMeScheme;
o.Events = new CookieAuthenticationEvents
{
OnValidatePrincipal = SecurityStampValidator.ValidateAsync<ITwoFactorSecurityStampValidator>
};
})
.AddCookie(IdentityConstants.TwoFactorUserIdScheme, o =>
{
o.Cookie.Name = IdentityConstants.TwoFactorUserIdScheme;
o.Events = new CookieAuthenticationEvents
{
OnRedirectToReturnUrl = _ => Task.CompletedTask
};
o.ExpireTimeSpan = TimeSpan.FromMinutes(5);
});
// Hosting doesn't add IHttpContextAccessor by default
services.AddHttpContextAccessor();
// Identity services
services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
services.TryAddScoped<ILookupNormalizer, UpperInvariantLookupNormalizer>();
services.TryAddScoped<IRoleValidator<TRole>, RoleValidator<TRole>>();
// No interface for the error describer so we can add errors without rev'ing the interface
services.TryAddScoped<IdentityErrorDescriber>();
services.TryAddScoped<ISecurityStampValidator, SecurityStampValidator<TUser>>();
services.TryAddScoped<ITwoFactorSecurityStampValidator, TwoFactorSecurityStampValidator<TUser>>();
services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser, TRole>>();
services.TryAddScoped<IUserConfirmation<TUser>, DefaultUserConfirmation<TUser>>();
services.TryAddScoped<UserManager<TUser>>();
services.TryAddScoped<SignInManager<TUser>>();
services.TryAddScoped<RoleManager<TRole>>();
if (setupAction != null)
{
services.Configure(setupAction);
}
return new IdentityBuilder(typeof(TUser), typeof(TRole), services);
}
/// <summary>
/// Configures the application cookie.
/// </summary>
/// <param name="services">The services available in the application.</param>
/// <param name="configure">An action to configure the <see cref="CookieAuthenticationOptions"/>.</param>
/// <returns>The services.</returns>
public static IServiceCollection ConfigureApplicationCookie(this IServiceCollection services, Action<CookieAuthenticationOptions> configure)
=> services.Configure(IdentityConstants.ApplicationScheme, configure);
/// <summary>
/// Configure the external cookie.
/// </summary>
/// <param name="services">The services available in the application.</param>
/// <param name="configure">An action to configure the <see cref="CookieAuthenticationOptions"/>.</param>
/// <returns>The services.</returns>
public static IServiceCollection ConfigureExternalCookie(this IServiceCollection services, Action<CookieAuthenticationOptions> configure)
=> services.Configure(IdentityConstants.ExternalScheme, configure);
}
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