Initial working solution

.gitignore

@@ -334,4 +334,7 @@ target
 .gradle
 local.properties
 *.lock
-/app/snippets-api
+/app/snippets-api
+
+**/tempkey.rsa
+**/identityserver4_log.txt

AuthorizationServer/AuthorizationServer.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.App" />
+    <PackageReference Include="IdentityServer4" Version="2.3.0" />
+
+    <PackageReference Include="Serilog" Version="2.7.1" />
+    <PackageReference Include="Serilog.AspNetCore" Version="2.1.1" />
+    <PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
+    <PackageReference Include="Serilog.Sinks.File" Version="4.0.0" />
+  </ItemGroup>
+
+</Project>

AuthorizationServer/Config.cs

@@ -0,0 +1,47 @@
+using IdentityServer4.Models;
+using System.Collections.Generic;
+
+namespace AuthorizationServer
+{
+    public static class Config
+    {
+        public static IEnumerable<IdentityResource> GetIdentityResources()
+        {
+            return new IdentityResource[]
+            {
+                new IdentityResources.OpenId(),
+                new IdentityResources.Profile(),
+            };
+        }
+
+        public static IEnumerable<ApiResource> GetApis()
+        {
+            return new ApiResource[]
+            {
+                new ApiResource("api1", "API #1")
+                {
+                    Scopes =
+                    {
+                        new Scope("api1.read"),
+                        new Scope("api1.write")
+                    }
+                }
+            };
+        }
+
+        public static IEnumerable<Client> GetClients()
+        {
+            return new Client[]
+            {
+                new Client
+                {
+                    ClientId = "ktor_app",
+                    AllowedGrantTypes = GrantTypes.Code,
+                    AllowedScopes = {"api1.read", "api1.write"},
+                    ClientSecrets = {new Secret("super_secret".Sha256())},
+                    RedirectUris = {"http://localhost:8080/callback"}
+                }
+            };
+        }
+    }
+}

AuthorizationServer/Program.cs

@@ -0,0 +1,40 @@
+// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
+
+
+using Microsoft.AspNetCore;
+using Microsoft.AspNetCore.Hosting;
+using Serilog;
+using Serilog.Events;
+using Serilog.Sinks.SystemConsole.Themes;
+using System;
+
+namespace AuthorizationServer
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.Title = "IdentityServer4";
+
+            CreateWebHostBuilder(args).Build().Run();
+        }
+
+        public static IWebHostBuilder CreateWebHostBuilder(string[] args)
+        {
+            return WebHost.CreateDefaultBuilder(args)
+                    .UseStartup<Startup>()
+                    .UseSerilog((context, configuration) =>
+                    {
+                        configuration
+                            .MinimumLevel.Debug()
+                            .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
+                            .MinimumLevel.Override("System", LogEventLevel.Warning)
+                            .MinimumLevel.Override("Microsoft.AspNetCore.Authentication", LogEventLevel.Information)
+                            .Enrich.FromLogContext()
+                            .WriteTo.File(@"identityserver4_log.txt")
+                            .WriteTo.Console(outputTemplate: "[{Timestamp:HH:mm:ss} {Level}] {SourceContext}{NewLine}{Message:lj}{NewLine}{Exception}{NewLine}", theme: AnsiConsoleTheme.Literate);
+                    });
+        }
+    }
+}

AuthorizationServer/Properties/launchSettings.json

@@ -0,0 +1,19 @@
+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:5000/",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "AuthorizationServer": {
+      "commandName": "Project",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "http://localhost:5000"
+    }
+  }
+}