[SM-220] Move identity specific files to identity (#2279)

src/Admin/IdentityServer/ServiceCollectionExtensions.cs

@@ -0,0 +1,44 @@
+using Bit.Core.Entities;
+using Bit.Core.Identity;
+using Bit.Core.Settings;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+
+namespace Bit.Admin.IdentityServer;
+
+public static class ServiceCollectionExtensions
+{
+    public static Tuple<IdentityBuilder, IdentityBuilder> AddPasswordlessIdentityServices<TUserStore>(
+        this IServiceCollection services, GlobalSettings globalSettings) where TUserStore : class
+    {
+        services.TryAddTransient<ILookupNormalizer, LowerInvariantLookupNormalizer>();
+        services.Configure<DataProtectionTokenProviderOptions>(options =>
+        {
+            options.TokenLifespan = TimeSpan.FromMinutes(15);
+        });
+
+        var passwordlessIdentityBuilder = services.AddIdentity<IdentityUser, Role>()
+            .AddUserStore<TUserStore>()
+            .AddRoleStore<RoleStore>()
+            .AddDefaultTokenProviders();
+
+        var regularIdentityBuilder = services.AddIdentityCore<User>()
+            .AddUserStore<UserStore>();
+
+        services.TryAddScoped<PasswordlessSignInManager<IdentityUser>, PasswordlessSignInManager<IdentityUser>>();
+
+        services.ConfigureApplicationCookie(options =>
+        {
+            options.LoginPath = "/login";
+            options.LogoutPath = "/";
+            options.AccessDeniedPath = "/login?accessDenied=true";
+            options.Cookie.Name = $"Bitwarden_{globalSettings.ProjectName}";
+            options.Cookie.HttpOnly = true;
+            options.ExpireTimeSpan = TimeSpan.FromDays(2);
+            options.ReturnUrlParameter = "returnUrl";
+            options.SlidingExpiration = true;
+        });
+
+        return new Tuple<IdentityBuilder, IdentityBuilder>(passwordlessIdentityBuilder, regularIdentityBuilder);
+    }
+}