Add support for more CAPTCHA providers

.gitignore

@@ -398,3 +398,4 @@ FodyWeavers.xsd
 *.sln.iml
 .idea/
 config.toml
+CollabVMAuthServer/rockyou.txt

CollabVMAuthServer/HTTP/Payloads/LoginPayload.cs

@@ -5,4 +5,6 @@ public class LoginPayload
     public string username { get; set; }
     public string password { get; set; }
     public string? captchaToken { get; set; }
+    public string? turnstileToken { get; set; }
+    public string? recaptchaToken { get; set; }
 }

CollabVMAuthServer/HTTP/Payloads/RegisterPayload.cs

@@ -6,5 +6,7 @@ public class RegisterPayload
     public string password { get; set; }
     public string email { get; set; }
     public string? captchaToken { get; set; }
+    public string? turnstileToken { get; set; }
+    public string? recaptchaToken { get; set; }
     public string dateOfBirth { get; set; }
 }

CollabVMAuthServer/HTTP/Payloads/SendResetEmailPayload.cs

@@ -5,4 +5,6 @@ public class SendResetEmailPayload
     public string email { get; set; }
     public string username { get; set; }
     public string? captchaToken { get; set; }
+    public string? turnstileToken { get; set; }
+    public string? recaptchaToken { get; set; }
 }

CollabVMAuthServer/HTTP/Responses/AuthServerInformation.cs

@@ -4,6 +4,9 @@ public class AuthServerInformation
 {
     public bool registrationOpen { get; set; }
     public AuthServerInformationCaptcha hcaptcha { get; set; }
+    public AuthServerInformationTurnstile turnstile { get; set; }
+    public AuthServerInformationReCAPTCHA recaptcha { get; set; }
+
 }
 
 public class AuthServerInformationCaptcha
@@ -11,3 +14,15 @@ public class AuthServerInformationCaptcha
     public bool required { get; set; }
     public string? siteKey { get; set; }
 }
+
+public class AuthServerInformationTurnstile
+{
+    public bool required { get; set; }
+    public string? siteKey { get; set; }
+}
+
+public class AuthServerInformationReCAPTCHA
+{
+    public bool required { get; set; }
+    public string? siteKey { get; set; }
+}

CollabVMAuthServer/HTTP/Routes.cs

@@ -99,6 +99,55 @@ public static class Routes
                 }, Utilities.JsonSerializerOptions);
             }
         }
+
+        // Check Turnstile response
+        if (Program.Config.Turnstile.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.turnstileToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new SendResetEmailResponse
+                {
+                    success = false,
+                    error = "Missing Turnstile token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.Turnstile!.Verify(payload.turnstileToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new SendResetEmailResponse
+                {
+                    success = false,
+                    error = "Invalid Turnstile response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
+                // Check reCAPTCHA response
+        if (Program.Config.ReCAPTCHA.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.recaptchaToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new SendResetEmailResponse
+                {
+                    success = false,
+                    error = "Missing reCAPTCHA token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.ReCAPTCHA!.Verify(payload.recaptchaToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new SendResetEmailResponse
+                {
+                    success = false,
+                    error = "Invalid reCAPTCHA response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
         // Check username and E-Mail
         var user = await Program.Database.GetUser(payload.username);
         if (user == null || user.Email != payload.email)
@@ -716,6 +765,56 @@ public static class Routes
                 }, Utilities.JsonSerializerOptions);
             }
         }
+
+        
+        // Check Turnstile response
+        if (Program.Config.Turnstile.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.turnstileToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new LoginResponse
+                {
+                    success = false,
+                    error = "Missing Turnstile token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.Turnstile!.Verify(payload.turnstileToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new LoginResponse
+                {
+                    success = false,
+                    error = "Invalid Turnstile response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
+        // Check reCAPTCHA response
+        if (Program.Config.ReCAPTCHA.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.recaptchaToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new LoginResponse
+                {
+                    success = false,
+                    error = "Missing reCAPTCHA token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.ReCAPTCHA!.Verify(payload.recaptchaToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new LoginResponse
+                {
+                    success = false,
+                    error = "Invalid reCAPTCHA response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
         // Validate username and password
         var user = await Program.Database.GetUser(payload.username);
         if (user == null || !Argon2.Verify(user.Password, payload.password))
@@ -936,6 +1035,56 @@ public static class Routes
                 }, Utilities.JsonSerializerOptions);
             }
         }
+
+        
+        // Check Turnstile response
+        if (Program.Config.Turnstile.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.turnstileToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new RegisterResponse
+                {
+                    success = false,
+                    error = "Missing Turnstile token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.Turnstile!.Verify(payload.turnstileToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new RegisterResponse
+                {
+                    success = false,
+                    error = "Invalid Turnstile response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
+        // Check reCAPTCHA response
+        if (Program.Config.ReCAPTCHA.Enabled)
+        {
+            if (string.IsNullOrWhiteSpace(payload.recaptchaToken))
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new RegisterResponse
+                {
+                    success = false,
+                    error = "Missing reCAPTCHA token"
+                }, Utilities.JsonSerializerOptions);
+            }
+            var result = await Program.ReCAPTCHA!.Verify(payload.recaptchaToken, ip.ToString());
+            if (!result.success)
+            {
+                context.Response.StatusCode = 400;
+                return Results.Json(new RegisterResponse
+                {
+                    success = false,
+                    error = "Invalid reCAPTCHA response"
+                }, Utilities.JsonSerializerOptions);
+            }
+        }
+
         // Make sure username isn't taken
         var user = await Program.Database.GetUser(payload.username);
         if (user != null || await Program.Database.GetBot(payload.username) != null)
@@ -1074,7 +1223,21 @@ public static class Routes
             new() {
                 required = Program.Config.hCaptcha.Enabled,
                 siteKey = Program.Config.hCaptcha.Enabled ? Program.Config.hCaptcha.SiteKey : null
-            }
+            },
+
+            turnstile =
+            new()
+            {
+                required = Program.Config.Turnstile.Enabled,
+                siteKey = Program.Config.Turnstile.Enabled ? Program.Config.Turnstile.SiteKey : null
+            },
+
+            recaptcha =
+            new()
+            {
+                required = Program.Config.ReCAPTCHA.Enabled,
+                siteKey = Program.Config.ReCAPTCHA.Enabled ? Program.Config.ReCAPTCHA.SiteKey : null
+            },
         });
     }
 }

CollabVMAuthServer/IConfig.cs

@@ -9,7 +9,8 @@ public class IConfig
     public MySQLConfig MySQL { get; set; }
     public SMTPConfig SMTP { get; set; }
     public hCaptchaConfig hCaptcha { get; set; }
-    
+    public TurnstileConfig Turnstile { get; set; }
+    public ReCAPTCHAConfig ReCAPTCHA { get; set; }
 }
 
 public class RegistrationConfig
@@ -66,3 +67,17 @@ public class hCaptchaConfig
     public string? Secret { get; set; }
     public string? SiteKey { get; set; }
 }
+
+public class TurnstileConfig
+{
+    public bool Enabled { get; set; }
+    public string? Secret { get; set; }
+    public string? SiteKey { get; set; }
+}
+
+public class ReCAPTCHAConfig
+{
+    public bool Enabled { get; set; }
+    public string? Secret { get; set; }
+    public string? SiteKey { get; set; }
+}

CollabVMAuthServer/Program.cs

@@ -10,6 +10,8 @@ public class Program
     public static IConfig Config { get; private set; }
     public static Database Database { get; private set; }
     public static hCaptchaClient? hCaptcha { get; private set; }
+    public static TurnstileClient? Turnstile { get; private set; }
+    public static ReCAPTCHAClient? ReCAPTCHA { get; private set; }
     public static Mailer? Mailer { get; private set; }
     public static string[] BannedPasswords { get; set; }
     public static readonly Random Random = new Random();
@@ -75,6 +77,28 @@ public class Program
         {
             Utilities.Log(LogLevel.INFO, "hCaptcha disabled");
         }
+
+        // Create Turnstile client
+        if (Config.Turnstile.Enabled)
+        {
+            Turnstile = new TurnstileClient(Config.Turnstile.Secret!);
+            Utilities.Log(LogLevel.INFO, "Turnstile enabled");
+        }
+        else
+        {
+            Utilities.Log(LogLevel.INFO, "Turnstile disabled");
+        }
+
+        // Create reCAPTCHA client
+        if (Config.ReCAPTCHA.Enabled)
+        {
+            ReCAPTCHA = new ReCAPTCHAClient(Config.ReCAPTCHA.Secret!);
+            Utilities.Log(LogLevel.INFO, "reCAPTCHA enabled");
+        }
+        else
+        {
+            Utilities.Log(LogLevel.INFO, "reCAPTCHA disabled");
+        }
         // load password list
         BannedPasswords = await File.ReadAllLinesAsync("rockyou.txt");
         // Configure web server

CollabVMAuthServer/ReCAPTCHAClient.cs

@@ -0,0 +1,30 @@
+using System.Text.Json.Serialization;
+
+namespace Computernewb.CollabVMAuthServer;
+
+public class ReCAPTCHAClient(string secret)
+{
+    private string secret = secret;
+    private HttpClient http = new HttpClient();
+
+    public async Task<ReCAPTCHAResponse> Verify(string token, string ip)
+    {
+        var response = await http.PostAsync("https://www.google.com/recaptcha/api/siteverify", new FormUrlEncodedContent(new []
+        {
+            new KeyValuePair<string, string>("secret", secret),
+            new KeyValuePair<string, string>("response", token),
+            new KeyValuePair<string, string>("remoteip", ip),
+        }));
+        response.EnsureSuccessStatusCode();
+        return await response.Content.ReadFromJsonAsync<ReCAPTCHAResponse>() ?? throw new Exception("Failed to parse reCAPTCHA response");
+    }
+}
+
+public class ReCAPTCHAResponse
+{
+    public bool success { get; set; }
+    public string challenge_ts { get; set; }
+    public string hostname { get; set; }
+    [JsonPropertyName("error-codes")]
+    public string[]? error_codes { get; set; }
+}

CollabVMAuthServer/TurnstileClient.cs

@@ -0,0 +1,30 @@
+using System.Text.Json.Serialization;
+
+namespace Computernewb.CollabVMAuthServer;
+
+public class TurnstileClient(string secret)
+{
+    private string secret = secret;
+    private HttpClient http = new HttpClient();
+
+    public async Task<TurnstileResponse> Verify(string token, string ip)
+    {
+        var response = await http.PostAsync("https://challenges.cloudflare.com/turnstile/v0/siteverify", new FormUrlEncodedContent(new []
+        {
+            new KeyValuePair<string, string>("secret", secret),
+            new KeyValuePair<string, string>("response", token),
+            new KeyValuePair<string, string>("remoteip", ip),
+        }));
+        response.EnsureSuccessStatusCode();
+        return await response.Content.ReadFromJsonAsync<TurnstileResponse>() ?? throw new Exception("Failed to parse Turnstile response");
+    }
+}
+
+public class TurnstileResponse
+{
+    public bool success { get; set; }
+    public string challenge_ts { get; set; }
+    public string hostname { get; set; }
+    [JsonPropertyName("error-codes")]
+    public string[]? error_codes { get; set; }
+}

CollabVMAuthServer/hCaptchaClient.cs

@@ -1,6 +1,4 @@
-using System.Text.Json;
 using System.Text.Json.Serialization;
-using System.Text.Json.Serialization.Metadata;
 
 namespace Computernewb.CollabVMAuthServer;
 

config.example.toml

@@ -54,18 +54,20 @@ FromEmail = "noreply@example.com"
 # The subject and body of the E-Mail sent to users when they need to verify their E-Mail address.
 VerificationCodeSubject = "CollabVM Account Verification"
 VerificationCodeBody = """
-Howdy! Someone (probably you) has tried to create a CollabVM account with this E-Mail. If this was you, your verification code is: $CODE
+Hello! Someone (probably you) has tried to create a CollabVM account with this E-Mail. If this was you, your verification code is: $CODE
 
 If this was not you, someone probably entered your e-mail by mistake. If this is the case, you can safely ignore this e-mail.
 """
 # The subject and body of the E-Mail sent to users when they need to reset their password.
 ResetPasswordSubject = "CollabVM Password Reset"
 ResetPasswordBody = """
-Howdy, $USERNAME! Someone (probably you) has sent a request to reset the password to your CollabVM account with this E-Mail. If this was you, your verification code is: $CODE
+Hello, $USERNAME! Someone (probably you) has sent a request to reset the password to your CollabVM account with this E-Mail. If this was you, your verification code is: $CODE
 
 If this was not you, disregard this E-Mail and your password will remain unchanged. Do not share this code with anyone.
 """
 
+# Note: You can have multiple CAPTCHA providers enabled at the same time.
+
 [hCaptcha]
 # If true, hCaptcha will be used for the registration, login, and password reset forms.
 Enabled = false
@@ -73,4 +75,16 @@ Enabled = false
 Secret = ""
 SiteKey = ""
 
+[Turnstile]
+# If true, Turnstile will be used for the registration, login, and password reset forms.
+Enabled = false
+# The Turnstile site key and secret key.
+Secret = ""
+SiteKey = ""
 
+[ReCAPTCHA]
+# If true, reCAPTCHA will be used for the registration, login, and password reset forms.
+Enabled = false
+# The reCAPTCHA site key and secret key.
+Secret = ""
+SiteKey = ""