feat: tailscale integration (#847)

internal/model/config.go

@@ -65,6 +65,9 @@ func NewDefaultConfiguration() *Config {
 		Experimental: ExperimentalConfig{
 			ConfigFile: "",
 		},
+		Tailscale: TailscaleConfig{
+			Dir: "./tailscale_state",
+		},
 		LabelProvider: "auto",
 	}
 }
@@ -84,6 +87,7 @@ type Config struct {
 	Experimental  ExperimentalConfig `description:"Experimental features, use with caution." yaml:"experimental"`
 	LabelProvider string             `description:"Label provider to use for ACLs (auto, docker, kubernetes or none to disable). auto detects the environment." yaml:"labelProvider"`
 	Log           LogConfig          `description:"Logging configuration." yaml:"log"`
+	Tailscale     TailscaleConfig    `description:"Tailscale configuration." yaml:"tailscale"`
 }
 
 type DatabaseConfig struct {
@@ -207,6 +211,16 @@ type ExperimentalConfig struct {
 	ConfigFile string `description:"Path to config file." yaml:"-"`
 }
 
+type TailscaleConfig struct {
+	Enabled   bool   `description:"Enable Tailscale integration." yaml:"enabled"`
+	Dir       string `description:"Tailscale state directory." yaml:"dir"`
+	Hostname  string `description:"Tailscale hostname." yaml:"hostname"`
+	AuthKey   string `description:"Tailscale auth key." yaml:"authKey"`
+	Ephemeral bool   `description:"Use ephemeral Tailscale node." yaml:"ephemeral"`
+}
+
+// OAuth/OIDC config
+
 type OAuthServiceConfig struct {
 	ClientID         string   `description:"OAuth client ID." yaml:"clientId"`
 	ClientSecret     string   `description:"OAuth client secret." yaml:"clientSecret"`

internal/model/constants.go

@@ -21,3 +21,5 @@ const SessionCookieName = "tinyauth-session"
 const CSRFCookieName = "tinyauth-csrf"
 const RedirectCookieName = "tinyauth-redirect"
 const OAuthSessionCookieName = "tinyauth-oauth"
+
+const GracefulShutdownTimeout = 5 // seconds

internal/model/context.go

@@ -19,6 +19,7 @@ const (
 	ProviderBasicAuth
 	ProviderOAuth
 	ProviderLDAP
+	ProviderTailscale
 )
 
 type UserContext struct {
@@ -27,6 +28,7 @@ type UserContext struct {
 	Local         *LocalContext
 	OAuth         *OAuthContext
 	LDAP          *LDAPContext
+	Tailscale     *TailscaleContext
 }
 
 type BaseContext struct {
@@ -54,6 +56,13 @@ type LDAPContext struct {
 	Groups []string
 }
 
+type TailscaleContext struct {
+	BaseContext
+	UserID string
+	// for future use
+	Tags []string
+}
+
 func (c *UserContext) IsAuthenticated() bool {
 	return c.Authenticated
 }
@@ -74,6 +83,10 @@ func (c *UserContext) IsBasicAuth() bool {
 	return c.Provider == ProviderBasicAuth && c.Local != nil
 }
 
+func (c *UserContext) IsTailscale() bool {
+	return c.Provider == ProviderTailscale && c.Tailscale != nil
+}
+
 func (c *UserContext) NewFromGin(ginctx *gin.Context) (*UserContext, error) {
 	userContextValue, exists := ginctx.Get("context")
 
@@ -87,7 +100,7 @@ func (c *UserContext) NewFromGin(ginctx *gin.Context) (*UserContext, error) {
 		return nil, errors.New("invalid user context type")
 	}
 
-	if userContext.LDAP == nil && userContext.Local == nil && userContext.OAuth == nil {
+	if userContext.LDAP == nil && userContext.Local == nil && userContext.OAuth == nil && userContext.Tailscale == nil {
 		return nil, errors.New("incomplete user context")
 	}
 
@@ -121,6 +134,15 @@ func (c *UserContext) NewFromSession(session *repository.Session) (*UserContext,
 				Email:    session.Email,
 			},
 		}
+	case "tailscale":
+		c.Provider = ProviderTailscale
+		c.Tailscale = &TailscaleContext{
+			BaseContext: BaseContext{
+				Username: session.Username,
+				Name:     session.Name,
+				Email:    session.Email,
+			},
+		}
 	// By default we assume an unknown name which is oauth
 	default:
 		c.Provider = ProviderOAuth
@@ -145,85 +167,55 @@ func (c *UserContext) NewFromSession(session *repository.Session) (*UserContext,
 	return c, nil
 }
 
-func (c *UserContext) GetUsername() string {
+func (c *UserContext) getBaseContext() *BaseContext {
 	switch c.Provider {
-	case ProviderLocal:
+	case ProviderLocal, ProviderBasicAuth:
 		if c.Local == nil {
-			return ""
+			return nil
 		}
-		return c.Local.Username
+		return &c.Local.BaseContext
 	case ProviderLDAP:
 		if c.LDAP == nil {
-			return ""
+			return nil
 		}
-		return c.LDAP.Username
-	case ProviderBasicAuth:
-		if c.Local == nil {
-			return ""
-		}
-		return c.Local.Username
+		return &c.LDAP.BaseContext
 	case ProviderOAuth:
 		if c.OAuth == nil {
-			return ""
+			return nil
 		}
-		return c.OAuth.Username
+		return &c.OAuth.BaseContext
+	case ProviderTailscale:
+		if c.Tailscale == nil {
+			return nil
+		}
+		return &c.Tailscale.BaseContext
 	default:
+		return nil
+	}
+}
+
+func (c *UserContext) GetUsername() string {
+	base := c.getBaseContext()
+	if base == nil {
 		return ""
 	}
+	return base.Username
 }
 
 func (c *UserContext) GetEmail() string {
-	switch c.Provider {
-	case ProviderLocal:
-		if c.Local == nil {
-			return ""
-		}
-		return c.Local.Email
-	case ProviderLDAP:
-		if c.LDAP == nil {
-			return ""
-		}
-		return c.LDAP.Email
-	case ProviderBasicAuth:
-		if c.Local == nil {
-			return ""
-		}
-		return c.Local.Email
-	case ProviderOAuth:
-		if c.OAuth == nil {
-			return ""
-		}
-		return c.OAuth.Email
-	default:
+	base := c.getBaseContext()
+	if base == nil {
 		return ""
 	}
+	return base.Email
 }
 
 func (c *UserContext) GetName() string {
-	switch c.Provider {
-	case ProviderLocal:
-		if c.Local == nil {
-			return ""
-		}
-		return c.Local.Name
-	case ProviderLDAP:
-		if c.LDAP == nil {
-			return ""
-		}
-		return c.LDAP.Name
-	case ProviderBasicAuth:
-		if c.Local == nil {
-			return ""
-		}
-		return c.Local.Name
-	case ProviderOAuth:
-		if c.OAuth == nil {
-			return ""
-		}
-		return c.OAuth.Name
-	default:
+	base := c.getBaseContext()
+	if base == nil {
 		return ""
 	}
+	return base.Name
 }
 
 func (c *UserContext) GetProviderID() string {
@@ -234,6 +226,8 @@ func (c *UserContext) GetProviderID() string {
 		return "ldap"
 	case ProviderOAuth:
 		return c.OAuth.ID
+	case ProviderTailscale:
+		return "tailscale"
 	default:
 		return "unknown"
 	}
@@ -252,3 +246,10 @@ func (c *UserContext) OAuthName() string {
 	}
 	return ""
 }
+
+func (c *UserContext) TailscaleNodeName() string {
+	if c.Tailscale != nil {
+		return c.Tailscale.Username
+	}
+	return ""
+}

internal/model/runtime.go

@@ -13,6 +13,7 @@ type RuntimeConfig struct {
 	OAuthWhitelist         []string
 	ConfiguredProviders    []Provider
 	OIDCClients            []OIDCClientConfig
+	TrustedDomains         []string
 }
 
 type Provider struct {