Add API user authentication to auth module with caching of creds on user CRUD.

cmd/init.go

@@ -994,7 +994,12 @@ func initAuth(db *sql.DB, ko *koanf.Koanf, co *core.Core) *auth.Auth {
 			Type:          models.UserTypeAPI,
 		}
 		u.Role.ID = auth.SuperAdminRoleID
-		a.SetToken(username, u)
+		a.CacheAPIUsers([]models.User{u})
+	}
+
+	// Load all API users.
+	if err := cacheAPIUsers(co, a); err != nil {
+		lo.Fatalf("error loading API users: %v", err)
 	}
 
 	return a

cmd/roles.go

@@ -76,6 +76,11 @@ func handleUpdateRole(c echo.Context) error {
 		return err
 	}
 
+	// Cache the API token for validating API queries without hitting the DB every time.
+	if err := cacheAPIUsers(app.core, app.auth); err != nil {
+		return err
+	}
+
 	return c.JSON(http.StatusOK, okResp{out})
 }
 
@@ -94,6 +99,11 @@ func handleDeleteRole(c echo.Context) error {
 		return err
 	}
 
+	// Cache the API token for validating API queries without hitting the DB every time.
+	if err := cacheAPIUsers(app.core, app.auth); err != nil {
+		return err
+	}
+
 	return c.JSON(http.StatusOK, okResp{true})
 }
 

cmd/users.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/knadh/listmonk/internal/auth"
+	"github.com/knadh/listmonk/internal/core"
 	"github.com/knadh/listmonk/internal/utils"
 	"github.com/knadh/listmonk/models"
 	"github.com/labstack/echo/v4"
@@ -94,15 +95,20 @@ func handleCreateUser(c echo.Context) error {
 	}
 
 	// Create the user in the database.
-	out, err := app.core.CreateUser(u)
+	user, err := app.core.CreateUser(u)
 	if err != nil {
 		return err
 	}
-	if out.Type != models.UserTypeAPI {
-		out.Password = null.String{}
+	if user.Type != models.UserTypeAPI {
+		user.Password = null.String{}
 	}
 
-	return c.JSON(http.StatusOK, okResp{out})
+	// Cache the API token for validating API queries without hitting the DB every time.
+	if err := cacheAPIUsers(app.core, app.auth); err != nil {
+		return err
+	}
+
+	return c.JSON(http.StatusOK, okResp{user})
 }
 
 // handleUpdateUser handles user modification.
@@ -170,13 +176,21 @@ func handleUpdateUser(c echo.Context) error {
 		u.Name = u.Username
 	}
 
-	out, err := app.core.UpdateUser(id, u)
+	// Update the user in the DB.
+	user, err := app.core.UpdateUser(id, u)
 	if err != nil {
 		return err
 	}
-	out.Password = null.String{}
 
-	return c.JSON(http.StatusOK, okResp{out})
+	// Clear the pasword before sending outside.
+	user.Password = null.String{}
+
+	// Cache the API token for validating API queries without hitting the DB every time.
+	if err := cacheAPIUsers(app.core, app.auth); err != nil {
+		return err
+	}
+
+	return c.JSON(http.StatusOK, okResp{user})
 }
 
 // handleDeleteUsers handles user deletion, either a single one (ID in the URI), or a list.
@@ -199,6 +213,11 @@ func handleDeleteUsers(c echo.Context) error {
 		return err
 	}
 
+	// Cache the API token for validating API queries without hitting the DB every time.
+	if err := cacheAPIUsers(app.core, app.auth); err != nil {
+		return err
+	}
+
 	return c.JSON(http.StatusOK, okResp{true})
 }
 
@@ -250,3 +269,20 @@ func handleUpdateUserProfile(c echo.Context) error {
 
 	return c.JSON(http.StatusOK, okResp{out})
 }
+
+func cacheAPIUsers(co *core.Core, a *auth.Auth) error {
+	allUsers, err := co.GetUsers()
+	if err != nil {
+		return err
+	}
+
+	apiUsers := make([]models.User, 0, len(allUsers))
+	for _, u := range allUsers {
+		if u.Type == models.UserTypeAPI && u.Status == models.UserStatusEnabled {
+			apiUsers = append(apiUsers, u)
+		}
+	}
+
+	a.CacheAPIUsers(apiUsers)
+	return nil
+}

internal/auth/auth.go

@@ -68,7 +68,7 @@ type Callbacks struct {
 }
 
 type Auth struct {
-	tokens map[string]models.User
+	apiUsers map[string]models.User
 	sync.RWMutex
 
 	cfg       Config
@@ -86,7 +86,7 @@ func New(cfg Config, db *sql.DB, cb *Callbacks, lo *log.Logger) (*Auth, error) {
 		cb:  cb,
 		log: lo,
 
-		tokens: map[string]models.User{},
+		apiUsers: map[string]models.User{},
 	}
 
 	// Initialize OIDC.
@@ -138,17 +138,21 @@ func New(cfg Config, db *sql.DB, cb *Callbacks, lo *log.Logger) (*Auth, error) {
 	return a, nil
 }
 
-// SetToken caches tokens for authenticating API client calls.
-func (o *Auth) SetToken(apiKey string, u models.User) {
+// CacheAPIUsers caches API users for authenticating requests.
+func (o *Auth) CacheAPIUsers(users []models.User) {
 	o.Lock()
-	o.tokens[apiKey] = u
+	o.apiUsers = map[string]models.User{}
+
+	for _, u := range users {
+		o.apiUsers[u.Username] = u
+	}
 	o.Unlock()
 }
 
-// GetToken validates an API user+token.
-func (o *Auth) GetToken(user string, token string) (models.User, bool) {
+// GetAPIToken validates an API user+token.
+func (o *Auth) GetAPIToken(user string, token string) (models.User, bool) {
 	o.RLock()
-	t, ok := o.tokens[user]
+	t, ok := o.apiUsers[user]
 	o.RUnlock()
 
 	if !ok || subtle.ConstantTimeCompare([]byte(t.Password.String), []byte(token)) != 1 {
@@ -221,7 +225,7 @@ func (o *Auth) Middleware(next echo.HandlerFunc) echo.HandlerFunc {
 			}
 
 			// Validate the token.
-			user, ok := o.GetToken(key, token)
+			user, ok := o.GetAPIToken(key, token)
 			if !ok {
 				c.Set(UserKey, echo.NewHTTPError(http.StatusForbidden, "invalid API credentials"))
 				return next(c)

internal/core/users.go

@@ -33,7 +33,7 @@ func (c *Core) GetUser(id int, username, email string) (models.User, error) {
 
 // CreateUser creates a new user.
 func (c *Core) CreateUser(u models.User) (models.User, error) {
-	var out models.User
+	var id int
 
 	// If it's an API user, generate a random token for password
 	// and set the e-mail to default.
@@ -41,7 +41,7 @@ func (c *Core) CreateUser(u models.User) (models.User, error) {
 		// Generate a random admin password.
 		tk, err := utils.GenerateRandomString(32)
 		if err != nil {
-			return out, err
+			return models.User{}, err
 		}
 
 		u.Email = null.String{String: u.Username + "@api", Valid: true}
@@ -49,7 +49,7 @@ func (c *Core) CreateUser(u models.User) (models.User, error) {
 		u.Password = null.String{String: tk, Valid: true}
 	}
 
-	if err := c.q.CreateUser.Get(&out, u.Username, u.PasswordLogin, u.Password, u.Email, u.Name, u.Type, u.RoleID, u.Status); err != nil {
+	if err := c.q.CreateUser.Get(&id, u.Username, u.PasswordLogin, u.Password, u.Email, u.Name, u.Type, u.RoleID, u.Status); err != nil {
 		return models.User{}, echo.NewHTTPError(http.StatusInternalServerError,
 			c.i18n.Ts("globals.messages.errorCreating", "name", "{globals.terms.user}", "error", pqErrMsg(err)))
 	}
@@ -60,7 +60,8 @@ func (c *Core) CreateUser(u models.User) (models.User, error) {
 		u.Password = null.String{Valid: false}
 	}
 
-	return out, nil
+	out, err := c.GetUser(id, "", "")
+	return out, err
 }
 
 // UpdateUser updates a given user.
@@ -75,7 +76,9 @@ func (c *Core) UpdateUser(id int, u models.User) (models.User, error) {
 		return models.User{}, echo.NewHTTPError(http.StatusBadRequest, c.i18n.T("users.needSuper"))
 	}
 
-	return c.GetUser(id, "", "")
+	out, err := c.GetUser(id, "", "")
+
+	return out, err
 }
 
 // UpdateUserProfile updates the basic fields of a given uesr (name, email, password).

queries.sql

@@ -1038,7 +1038,7 @@ INSERT INTO users (username, password_login, password, email, name, type, role_i
                 THEN $3
             ELSE NULL
         END
-    ), $4, $5, $6, $7, $8) RETURNING *;
+    ), $4, $5, $6, $7, $8) RETURNING id;
 
 -- name: update-user
 WITH u AS (