chat: add hello controller

Foxchat.Chat/Controllers/HelloController.cs

@@ -0,0 +1,45 @@
+using Foxchat.Chat.Database;
+using Foxchat.Chat.Database.Models;
+using Foxchat.Chat.Middleware;
+using Foxchat.Core.Extensions;
+using Foxchat.Core.Federation;
+using Foxchat.Core.Models.Http;
+using Microsoft.AspNetCore.Mvc;
+using ApiError = Foxchat.Core.ApiError;
+
+namespace Foxchat.Chat.Controllers;
+
+[ApiController]
+[Unauthenticated]
+[Route("/_fox/chat/hello")]
+public class HelloController(
+    ILogger logger,
+    ChatContext db,
+    InstanceConfig config,
+    RequestSigningService requestSigningService)
+    : ControllerBase
+{
+    [HttpPost]
+    public async Task<IActionResult> Hello([FromBody] Hello.HelloRequest req)
+    {
+        var node = await requestSigningService.RequestAsync<Hello.NodeInfo>(HttpMethod.Get, req.Host,
+            "/_fox/ident/node");
+
+        if (!HttpContext.ExtractRequestData(out var signature, out var domain, out var signatureData))
+            throw new ApiError.IncomingFederationError("This endpoint requires signed requests.");
+
+        if (!requestSigningService.VerifySignature(node.PublicKey, signature, signatureData))
+            throw new ApiError.IncomingFederationError("Signature is not valid.");
+
+        var instance = await db.GetInstanceAsync();
+        db.IdentityInstances.Add(new IdentityInstance
+        {
+            Domain = req.Host,
+            BaseUrl = $"https://{req.Host}",
+            PublicKey = node.PublicKey
+        });
+        await db.SaveChangesAsync();
+
+        return Ok(new Hello.HelloResponse(instance.PublicKey, config.Domain));
+    }
+}

Foxchat.Chat/Middleware/AuthenticationMiddleware.cs

@@ -1,6 +1,7 @@
 using Foxchat.Chat.Database;
 using Foxchat.Chat.Database.Models;
 using Foxchat.Core;
+using Foxchat.Core.Extensions;
 using Foxchat.Core.Federation;
 using Microsoft.EntityFrameworkCore;
 
@@ -20,7 +21,7 @@ public class AuthenticationMiddleware(ILogger logger, ChatContext db, RequestSig
             return;
         }
 
-        if (!ExtractRequestData(ctx, out var signature, out var domain, out var signatureData))
+        if (!ctx.ExtractRequestData(out var signature, out var domain, out var signatureData))
             throw new ApiError.IncomingFederationError("This endpoint requires signed requests.");
 
         var instance = await GetInstanceAsync(domain);
@@ -38,37 +39,6 @@ public class AuthenticationMiddleware(ILogger logger, ChatContext db, RequestSig
         return await db.IdentityInstances.FirstOrDefaultAsync(i => i.Domain == domain)
                ?? throw new ApiError.IncomingFederationError("Remote instance is not known.");
     }
-
-    private bool ExtractRequestData(HttpContext ctx, out string signature, out string domain, out SignatureData data)
-    {
-        signature = string.Empty;
-        domain = string.Empty;
-        data = SignatureData.Empty;
-
-        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.SIGNATURE_HEADER, out var encodedSignature))
-            return false;
-        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.DATE_HEADER, out var date))
-            return false;
-        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.SERVER_HEADER, out var server))
-            return false;
-        var time = RequestSigningService.ParseTime(date.ToString());
-        string? userId = null;
-        if (ctx.Request.Headers.TryGetValue(RequestSigningService.USER_HEADER, out var userIdHeader))
-            userId = userIdHeader;
-        var host = ctx.Request.Headers.Host.ToString();
-
-        signature = encodedSignature.ToString();
-        domain = server.ToString();
-        data = new SignatureData(
-            time,
-            host,
-            ctx.Request.Path,
-            (int?)ctx.Request.Headers.ContentLength,
-            userId
-        );
-
-        return true;
-    }
 }
 
 [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]

Foxchat.Chat/Program.cs

@@ -3,6 +3,7 @@ using Serilog;
 using Foxchat.Core;
 using Foxchat.Chat;
 using Foxchat.Chat.Database;
+using Foxchat.Chat.Extensions;
 using Newtonsoft.Json;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -33,6 +34,7 @@ builder.Services
 
 builder.Services
     .AddCoreServices<ChatContext>()
+    .AddCustomMiddleware()
     .AddEndpointsApiExplorer()
     .AddSwaggerGen();
 
@@ -43,8 +45,7 @@ app.UseRouting();
 app.UseSwagger();
 app.UseSwaggerUI();
 app.UseCors();
-app.UseAuthentication();
-app.UseAuthorization();
+app.UseCustomMiddleware();
 app.MapControllers();
 
 using (var scope = app.Services.CreateScope())

Foxchat.Core/Database/IDatabaseContext.cs

@@ -16,11 +16,11 @@ public abstract class IDatabaseContext : DbContext
         var publicKey = rsa.ExportRSAPublicKeyPem();
         var privateKey = rsa.ExportRSAPrivateKeyPem();
 
-        await Instance.AddAsync(new Instance
+        Instance.Add(new Instance
         {
             PublicKey = publicKey!,
             PrivateKey = privateKey!,
-        }, ct);
+        });
 
         await SaveChangesAsync(ct);
         return true;

Foxchat.Core/Extensions/HttpContextExtensions.cs

@@ -0,0 +1,38 @@
+using Foxchat.Core.Federation;
+using Microsoft.AspNetCore.Http;
+
+namespace Foxchat.Core.Extensions;
+
+public static class HttpContextExtensions
+{
+    public static bool ExtractRequestData(this HttpContext ctx, out string signature, out string domain, out SignatureData data)
+    {
+        signature = string.Empty;
+        domain = string.Empty;
+        data = SignatureData.Empty;
+
+        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.SIGNATURE_HEADER, out var encodedSignature))
+            return false;
+        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.DATE_HEADER, out var date))
+            return false;
+        if (!ctx.Request.Headers.TryGetValue(RequestSigningService.SERVER_HEADER, out var server))
+            return false;
+        var time = RequestSigningService.ParseTime(date.ToString());
+        string? userId = null;
+        if (ctx.Request.Headers.TryGetValue(RequestSigningService.USER_HEADER, out var userIdHeader))
+            userId = userIdHeader;
+        var host = ctx.Request.Headers.Host.ToString();
+
+        signature = encodedSignature.ToString();
+        domain = server.ToString();
+        data = new SignatureData(
+            time,
+            host,
+            ctx.Request.Path,
+            (int?)ctx.Request.Headers.ContentLength,
+            userId
+        );
+
+        return true;
+    }
+}

Foxchat.Core/Models/Http/Hello.cs

@@ -4,6 +4,6 @@ public static class Hello
 {
     public record HelloRequest(string Host);
     public record HelloResponse(string PublicKey, string Host);
-    public record NodeInfo(string Software, string PublicKey);
+    public record NodeInfo(NodeSoftware Software, string PublicKey);
     public record NodeSoftware(string Name, string? Version);
 }

Foxchat.Identity/Controllers/NodeController.cs

@@ -1,3 +1,4 @@
+using Foxchat.Core;
 using Foxchat.Core.Models.Http;
 using Foxchat.Identity.Database;
 using Foxchat.Identity.Services;
@@ -7,15 +8,16 @@ namespace Foxchat.Identity.Controllers;
 
 [ApiController]
 [Route("/_fox/ident/node")]
-public class NodeController(IdentityContext db, ChatInstanceResolverService chatInstanceResolverService) : ControllerBase
+public class NodeController(IdentityContext db, ChatInstanceResolverService chatInstanceResolverService)
+    : ControllerBase
 {
-    public const string SOFTWARE_NAME = "Foxchat.NET.Identity";
+    private const string SoftwareName = "Foxchat.NET.Identity";
 
     [HttpGet]
     public async Task<IActionResult> GetNode()
     {
         var instance = await db.GetInstanceAsync();
-        return Ok(new Hello.NodeInfo(SOFTWARE_NAME, instance.PublicKey));
+        return Ok(new Hello.NodeInfo(new Hello.NodeSoftware(SoftwareName, BuildInfo.Version), instance.PublicKey));
     }
 
     [HttpGet("{domain}")]

Foxchat.Identity/Controllers/Oauth/AppsController.cs

@@ -17,7 +17,7 @@ public class AppsController(ILogger logger, IdentityContext db) : ControllerBase
     public async Task<IActionResult> CreateApplication([FromBody] Apps.CreateRequest req)
     {
         var app = Application.Create(req.Name, req.Scopes, req.RedirectUris);
-        await db.AddAsync(app);
+        db.Add(app);
         await db.SaveChangesAsync();
 
         logger.Information("Created new application {Name} with ID {Id} and client ID {ClientId}", app.Name, app.Id, app.ClientId);

Foxchat.Identity/Controllers/Oauth/PasswordAuthController.cs

@@ -21,10 +21,13 @@ public class PasswordAuthController(ILogger logger, IdentityContext db, IClock c
     public async Task<IActionResult> Register([FromBody] RegisterRequest req)
     {
         var app = HttpContext.GetApplicationOrThrow();
-        var appToken = HttpContext.GetToken() ?? throw new UnreachableException(); // GetApplicationOrThrow already gets the token and throws if it's null
+        var appToken =
+            HttpContext.GetToken() ??
+            throw new UnreachableException(); // GetApplicationOrThrow already gets the token and throws if it's null
 
         if (req.Scopes.Except(appToken.Scopes).Any())
-            throw new ApiError.Forbidden("Cannot request token scopes that are not allowed for this token", req.Scopes.Except(appToken.Scopes));
+            throw new ApiError.Forbidden("Cannot request token scopes that are not allowed for this token",
+                req.Scopes.Except(appToken.Scopes));
 
         var acct = new Account
         {
@@ -33,12 +36,12 @@ public class PasswordAuthController(ILogger logger, IdentityContext db, IClock c
             Role = Account.AccountRole.User
         };
 
-        await db.AddAsync(acct);
+        db.Add(acct);
         var hashedPassword = await Task.Run(() => _passwordHasher.HashPassword(acct, req.Password));
         acct.Password = hashedPassword;
         // TODO: make token expiry configurable
         var (tokenStr, token) = Token.Create(acct, app, req.Scopes, clock.GetCurrentInstant() + Duration.FromDays(365));
-        await db.AddAsync(token);
+        db.Add(token);
         await db.SaveChangesAsync();
 
         return Ok(new AuthResponse(acct.Id, acct.Username, acct.Email, tokenStr));
@@ -51,7 +54,8 @@ public class PasswordAuthController(ILogger logger, IdentityContext db, IClock c
         var appToken = HttpContext.GetToken() ?? throw new UnreachableException();
 
         if (req.Scopes.Except(appToken.Scopes).Any())
-            throw new ApiError.Forbidden("Cannot request token scopes that are not allowed for this token", req.Scopes.Except(appToken.Scopes));
+            throw new ApiError.Forbidden("Cannot request token scopes that are not allowed for this token",
+                req.Scopes.Except(appToken.Scopes));
 
         var acct = await db.Accounts.FirstOrDefaultAsync(a => a.Email == req.Email)
                    ?? throw new ApiError.NotFound("No user with that email found, or password is incorrect");
@@ -62,15 +66,16 @@ public class PasswordAuthController(ILogger logger, IdentityContext db, IClock c
         if (pwResult == PasswordVerificationResult.SuccessRehashNeeded)
             acct.Password = await Task.Run(() => _passwordHasher.HashPassword(acct, req.Password));
 
-        
         var (tokenStr, token) = Token.Create(acct, app, req.Scopes, clock.GetCurrentInstant() + Duration.FromDays(365));
-        await db.AddAsync(token);
+        db.Add(token);
         await db.SaveChangesAsync();
 
         return Ok(new AuthResponse(acct.Id, acct.Username, acct.Email, tokenStr));
     }
 
     public record RegisterRequest(string Username, string Password, string Email, string[] Scopes);
+
     public record LoginRequest(string Email, string Password, string[] Scopes);
+
     public record AuthResponse(Ulid Id, string Username, string Email, string Token);
 }

Foxchat.Identity/Controllers/Oauth/TokenController.cs

@@ -41,7 +41,7 @@ public class TokenController(ILogger logger, IdentityContext db, IClock clock) :
         var expiry = clock.GetCurrentInstant() + Duration.FromDays(365);
         var (token, tokenObj) = Token.Create(null, app, scopes, expiry);
 
-        await db.AddAsync(tokenObj);
+        db.Add(tokenObj);
         await db.SaveChangesAsync();
 
         logger.Debug("Created token with scopes {Scopes} for application {ApplicationId}", scopes, app.Id);

Foxchat.Identity/Services/ChatInstanceResolverService.cs

@@ -31,7 +31,7 @@ public class ChatInstanceResolverService(ILogger logger, RequestSigningService r
             PublicKey = resp.PublicKey,
             Status = ChatInstance.InstanceStatus.Active,
         };
-        await db.AddAsync(instance);
+        db.Add(instance);
         await db.SaveChangesAsync();
 
         return instance;