New: Added Auth-* log entries for fail2ban purposes

closes #2760

src/NzbDrone.Common/Instrumentation/NzbDroneLogger.cs

@@ -57,6 +57,8 @@ namespace NzbDrone.Common.Instrumentation
                 RegisterAppFile(appFolderInfo);
             }
 
+            RegisterAuthLogger();
+
             LogManager.ReconfigExistingLoggers();
         }
 
@@ -195,6 +197,23 @@ namespace NzbDrone.Common.Instrumentation
             LogManager.Configuration.LoggingRules.Add(loggingRule);
         }
 
+        private static void RegisterAuthLogger()
+        {
+            var consoleTarget = LogManager.Configuration.FindTargetByName("console");
+            var fileTarget = LogManager.Configuration.FindTargetByName("appFileInfo");
+
+            var target = consoleTarget ?? fileTarget ?? new NullTarget();
+
+            // Send Auth to Console and info app file, but not the log database
+            var rule = new LoggingRule("Auth", LogLevel.Info, target) { Final = true };
+            if (consoleTarget != null && fileTarget != null)
+            {
+                rule.Targets.Add(fileTarget);
+            }
+
+            LogManager.Configuration.LoggingRules.Insert(0, rule);
+        }
+
         public static Logger GetLogger(Type obj)
         {
             return LogManager.GetLogger(obj.Name.Replace("NzbDrone.", ""));

src/Sonarr.Http/Authentication/AuthenticationModule.cs

@@ -3,6 +3,8 @@ using Nancy;
 using Nancy.Authentication.Forms;
 using Nancy.Extensions;
 using Nancy.ModelBinding;
+using NLog;
+using NzbDrone.Common.Instrumentation;
 using NzbDrone.Core.Authentication;
 using NzbDrone.Core.Configuration;
 
@@ -10,12 +12,12 @@ namespace Sonarr.Http.Authentication
 {
     public class AuthenticationModule : NancyModule
     {
-        private readonly IUserService _userService;
+        private readonly IAuthenticationService _authService;
         private readonly IConfigFileProvider _configFileProvider;
 
-        public AuthenticationModule(IUserService userService, IConfigFileProvider configFileProvider)
+        public AuthenticationModule(IAuthenticationService authService, IConfigFileProvider configFileProvider)
         {
-            _userService = userService;
+            _authService = authService;
             _configFileProvider = configFileProvider;
             Post["/login"] = x => Login(this.Bind<LoginResource>());
             Get["/logout"] = x => Logout();
@@ -23,7 +25,7 @@ namespace Sonarr.Http.Authentication
 
         private Response Login(LoginResource resource)
         {
-            var user = _userService.FindUser(resource.Username, resource.Password);
+            var user = _authService.Login(Context, resource.Username, resource.Password);
 
             if (user == null)
             {
@@ -43,6 +45,8 @@ namespace Sonarr.Http.Authentication
 
         private Response Logout()
         {
+            _authService.Logout(Context);
+
             return this.LogoutAndRedirect(_configFileProvider.UrlBase + "/");
         }
     }

src/Sonarr.Http/Authentication/AuthenticationService.cs

@@ -4,7 +4,9 @@ using Nancy;
 using Nancy.Authentication.Basic;
 using Nancy.Authentication.Forms;
 using Nancy.Security;
+using NLog;
 using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Instrumentation;
 using NzbDrone.Core.Authentication;
 using NzbDrone.Core.Configuration;
 using Sonarr.Http.Extensions;
@@ -13,24 +15,75 @@ namespace Sonarr.Http.Authentication
 {
     public interface IAuthenticationService : IUserValidator, IUserMapper
     {
+        void SetContext(NancyContext context);
+
+        void LogUnauthorized(NancyContext context);
+        User Login(NancyContext context, string username, string password);
+        void Logout(NancyContext context);
         bool IsAuthenticated(NancyContext context);
     }
 
     public class AuthenticationService : IAuthenticationService
     {
-        private readonly IUserService _userService;
+        private static readonly Logger _authLogger = LogManager.GetLogger("Auth");
         private static readonly NzbDroneUser AnonymousUser = new NzbDroneUser { UserName = "Anonymous" };
-        
+        private readonly IUserService _userService;
+        private readonly NancyContext _nancyContext;
+
         private static string API_KEY;
         private static AuthenticationType AUTH_METHOD;
 
-        public AuthenticationService(IConfigFileProvider configFileProvider, IUserService userService)
+        [ThreadStatic]
+        private static NancyContext _context; 
+
+        public AuthenticationService(IConfigFileProvider configFileProvider, IUserService userService, NancyContext nancyContext)
         {
             _userService = userService;
+            _nancyContext = nancyContext;
             API_KEY = configFileProvider.ApiKey;
             AUTH_METHOD = configFileProvider.AuthenticationMethod;
         }
 
+        public void SetContext(NancyContext context)
+        {
+            // Validate and GetUserIdentifier don't have access to the NancyContext so get it from the pipeline earlier
+            _context = context;
+        }
+
+        public User Login(NancyContext context, string username, string password)
+        {
+            if (AUTH_METHOD == AuthenticationType.None)
+            {
+                return null;
+            }
+
+            var user = _userService.FindUser(username, password);
+
+            if (user != null)
+            {
+                LogSuccess(context, username);
+
+                return user;
+            }
+
+            LogFailure(context, username);
+
+            return null;
+        }
+
+        public void Logout(NancyContext context)
+        {
+            if (AUTH_METHOD == AuthenticationType.None)
+            {
+                return;
+            }
+
+            if (context.CurrentUser != null)
+            {
+                LogLogout(context, context.CurrentUser.UserName);
+            }
+        }
+
         public IUserIdentity Validate(string username, string password)
         {
             if (AUTH_METHOD == AuthenticationType.None)
@@ -42,9 +95,17 @@ namespace Sonarr.Http.Authentication
 
             if (user != null)
             {
+                if (AUTH_METHOD != AuthenticationType.Basic)
+                {
+                    // Don't log success for basic auth
+                    LogSuccess(_context, username);
+                }
+
                 return new NzbDroneUser { UserName = user.Username };
             }
 
+            LogFailure(_context, username);
+
             return null;
         }
 
@@ -62,6 +123,8 @@ namespace Sonarr.Http.Authentication
                 return new NzbDroneUser { UserName = user.Username };
             }
 
+            LogInvalidated(_context);
+
             return null;
         }
 
@@ -138,5 +201,30 @@ namespace Sonarr.Http.Authentication
 
             return context.Request.Headers.Authorization;
         }
+
+        public void LogUnauthorized(NancyContext context)
+        {
+            _authLogger.Info("Auth-Unauthorized ip {0} url '{1}'", context.Request.UserHostAddress, context.Request.Url.ToString());
+        }
+
+        private void LogInvalidated(NancyContext context)
+        {
+            _authLogger.Info("Auth-Invalidated ip {0}", context.Request.UserHostAddress);
+        }
+
+        private void LogFailure(NancyContext context, string username)
+        {
+            _authLogger.Warn("Auth-Failure ip {0} username '{1}'", context.Request.UserHostAddress, username);
+        }
+
+        private void LogSuccess(NancyContext context, string username)
+        {
+            _authLogger.Info("Auth-Success ip {0} username '{1}'", context.Request.UserHostAddress, username);
+        }
+
+        private void LogLogout(NancyContext context, string username)
+        {
+            _authLogger.Info("Auth-Logout ip {0} username '{1}'", context.Request.UserHostAddress, username);
+        }
     }
 }

src/Sonarr.Http/Authentication/EnableAuthInNancy.cs

@@ -43,18 +43,28 @@ namespace Sonarr.Http.Authentication
             else if (_configFileProvider.AuthenticationMethod == AuthenticationType.Basic)
             {
                 pipelines.EnableBasicAuthentication(new BasicAuthenticationConfiguration(_authenticationService, "Sonarr"));
+                pipelines.BeforeRequest.AddItemToStartOfPipeline(CaptureContext);
             }
 
             pipelines.BeforeRequest.AddItemToEndOfPipeline((Func<NancyContext, Response>)RequiresAuthentication);
             pipelines.AfterRequest.AddItemToEndOfPipeline((Action<NancyContext>)RemoveLoginHooksForApiCalls);
         }
 
+        private Response CaptureContext(NancyContext context)
+        {
+            _authenticationService.SetContext(context);
+
+            return null;
+        }
+
+
         private Response RequiresAuthentication(NancyContext context)
         {
             Response response = null;
 
             if (!_authenticationService.IsAuthenticated(context))
             {
+                _authenticationService.LogUnauthorized(context);
                 response = new Response { StatusCode = HttpStatusCode.Unauthorized };
             }