feat(auth): add auth hash (allows purging sessions & more)

api/api.go

@@ -2,7 +2,6 @@ package api
 
 import (
 	"context"
-	"crypto/rand"
 	"embed"
 	"fmt"
 	"html/template"
@@ -20,14 +19,16 @@ import (
 	log "github.com/sirupsen/logrus"
 	"reichard.io/antholume/config"
 	"reichard.io/antholume/database"
+	"reichard.io/antholume/utils"
 )
 
 type API struct {
 	db            *database.DBManager
 	cfg           *config.Config
 	assets        *embed.FS
-	templates  map[string]*template.Template
 	httpServer    *http.Server
+	templates     map[string]*template.Template
+	userAuthCache map[string]string
 }
 
 var htmlPolicy = bluemonday.StrictPolicy()
@@ -37,6 +38,7 @@ func NewApi(db *database.DBManager, c *config.Config, assets *embed.FS) *API {
 		db:            db,
 		cfg:           c,
 		assets:        assets,
+		userAuthCache: make(map[string]string),
 	}
 
 	// Create Router
@@ -63,7 +65,7 @@ func NewApi(db *database.DBManager, c *config.Config, assets *embed.FS) *API {
 		newToken = []byte(c.CookieAuthKey)
 	} else {
 		log.Info("Generating cookie auth key")
-		newToken, err = generateToken(64)
+		newToken, err = utils.GenerateToken(64)
 		if err != nil {
 			log.Panic("Unable to generate cookie auth key")
 		}
@@ -102,8 +104,8 @@ func NewApi(db *database.DBManager, c *config.Config, assets *embed.FS) *API {
 
 func (api *API) Start() error {
 	return api.httpServer.ListenAndServe()
-
 }
+
 func (api *API) Stop() error {
 	// Stop Server
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
@@ -115,7 +117,6 @@ func (api *API) Stop() error {
 
 	// Close DB
 	return api.db.DB.Close()
-
 }
 
 func (api *API) registerWebAppRoutes(router *gin.Engine) {
@@ -312,12 +313,3 @@ func apiLogger() gin.HandlerFunc {
 		log.WithFields(logData).Info(fmt.Sprintf("%s %s", c.Request.Method, c.Request.URL.Path))
 	}
 }
-
-func generateToken(n int) ([]byte, error) {
-	b := make([]byte, n)
-	_, err := rand.Read(b)
-	if err != nil {
-		return nil, err
-	}
-	return b, nil
-}

api/app-routes.go

@@ -1453,15 +1453,10 @@ func (api *API) processRestoreFile(rAdminAction requestAdminAction, c *gin.Conte
 		return
 	}
 
-	// Close DB
-	err = api.db.DB.Close()
-	if err != nil {
-		appErrorPage(c, http.StatusInternalServerError, "Unable to close DB.")
-		log.Panic("Unable to close DB: ", err)
-	}
-
 	// Reinit DB
-	api.db.Reload()
+	if err := api.db.Reload(); err != nil {
+		log.Panicf("Unable to reload DB: %v", err)
+	}
 }
 
 func (api *API) restoreData(zipReader *zip.Reader) error {

api/auth.go

@@ -12,12 +12,14 @@ import (
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
 	"reichard.io/antholume/database"
+	"reichard.io/antholume/utils"
 )
 
 // Authorization Data
 type authData struct {
 	UserName string
 	IsAdmin  bool
+	AuthHash string
 }
 
 // KOSync API Auth Headers
@@ -41,9 +43,13 @@ func (api *API) authorizeCredentials(username string, password string) (auth *au
 		return
 	}
 
+	// Update Auth Cache
+	api.userAuthCache[user.ID] = user.AuthHash
+
 	return &authData{
 		UserName: user.ID,
 		IsAdmin:  user.Admin,
+		AuthHash: user.AuthHash,
 	}
 }
 
@@ -51,7 +57,7 @@ func (api *API) authKOMiddleware(c *gin.Context) {
 	session := sessions.Default(c)
 
 	// Check Session First
-	if auth, ok := getSession(session); ok == true {
+	if auth, ok := api.getSession(session); ok == true {
 		c.Set("Authorization", auth)
 		c.Header("Cache-Control", "private")
 		c.Next()
@@ -76,7 +82,7 @@ func (api *API) authKOMiddleware(c *gin.Context) {
 		return
 	}
 
-	if err := setSession(session, *authData); err != nil {
+	if err := api.setSession(session, *authData); err != nil {
 		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
 		return
 	}
@@ -114,7 +120,7 @@ func (api *API) authWebAppMiddleware(c *gin.Context) {
 	session := sessions.Default(c)
 
 	// Check Session
-	if auth, ok := getSession(session); ok == true {
+	if auth, ok := api.getSession(session); ok == true {
 		c.Set("Authorization", auth)
 		c.Header("Cache-Control", "private")
 		c.Next()
@@ -163,7 +169,7 @@ func (api *API) appAuthFormLogin(c *gin.Context) {
 
 	// Set Session
 	session := sessions.Default(c)
-	if err := setSession(session, *authData); err != nil {
+	if err := api.setSession(session, *authData); err != nil {
 		templateVars["Error"] = "Invalid Credentials"
 		c.HTML(http.StatusUnauthorized, "page/login", templateVars)
 		return
@@ -199,9 +205,20 @@ func (api *API) appAuthFormRegister(c *gin.Context) {
 		return
 	}
 
+	// Generate Auth Hash
+	rawAuthHash, err := utils.GenerateToken(64)
+	if err != nil {
+		log.Error("Failed to generate user token: ", err)
+		templateVars["Error"] = "Failed to Create User"
+		c.HTML(http.StatusBadRequest, "page/login", templateVars)
+		return
+	}
+
+	// Create User in DB
 	rows, err := api.db.Queries.CreateUser(api.db.Ctx, database.CreateUserParams{
 		ID:       username,
 		Pass:     &hashedPassword,
+		AuthHash: fmt.Sprintf("%x", rawAuthHash),
 	})
 
 	// SQL Error
@@ -233,9 +250,10 @@ func (api *API) appAuthFormRegister(c *gin.Context) {
 	auth := authData{
 		UserName: user.ID,
 		IsAdmin:  user.Admin,
+		AuthHash: user.AuthHash,
 	}
 	session := sessions.Default(c)
-	if err := setSession(session, auth); err != nil {
+	if err := api.setSession(session, auth); err != nil {
 		appErrorPage(c, http.StatusUnauthorized, "Unauthorized.")
 		return
 	}
@@ -251,12 +269,13 @@ func (api *API) appAuthLogout(c *gin.Context) {
 	c.Redirect(http.StatusFound, "/login")
 }
 
-func getSession(session sessions.Session) (auth authData, ok bool) {
+func (api *API) getSession(session sessions.Session) (auth authData, ok bool) {
-	// Check Session
+	// Get Session
 	authorizedUser := session.Get("authorizedUser")
 	isAdmin := session.Get("isAdmin")
 	expiresAt := session.Get("expiresAt")
-	if authorizedUser == nil || isAdmin == nil || expiresAt == nil {
+	authHash := session.Get("authHash")
+	if authorizedUser == nil || isAdmin == nil || expiresAt == nil || authHash == nil {
 		return
 	}
 
@@ -264,22 +283,70 @@ func getSession(session sessions.Session) (auth authData, ok bool) {
 	auth = authData{
 		UserName: authorizedUser.(string),
 		IsAdmin:  isAdmin.(bool),
+		AuthHash: authHash.(string),
+	}
+
+	// Validate Auth Hash
+	correctAuthHash, err := api.getUserAuthHash(auth.UserName)
+	if err != nil || correctAuthHash != auth.AuthHash {
+		return
 	}
 
 	// Refresh
 	if expiresAt.(int64)-time.Now().Unix() < 60*60*24 {
 		log.Info("Refreshing Session")
-		setSession(session, auth)
+		api.setSession(session, auth)
 	}
 
 	// Authorized
 	return auth, true
 }
 
-func setSession(session sessions.Session, auth authData) error {
+func (api *API) setSession(session sessions.Session, auth authData) error {
 	// Set Session Cookie
 	session.Set("authorizedUser", auth.UserName)
 	session.Set("isAdmin", auth.IsAdmin)
 	session.Set("expiresAt", time.Now().Unix()+(60*60*24*7))
+	session.Set("authHash", auth.AuthHash)
+
 	return session.Save()
 }
+
+func (api *API) getUserAuthHash(username string) (string, error) {
+	// Return Cache
+	if api.userAuthCache[username] != "" {
+		return api.userAuthCache[username], nil
+	}
+
+	// Get DB
+	user, err := api.db.Queries.GetUser(api.db.Ctx, username)
+	if err != nil {
+		log.Error("GetUser DB Error:", err)
+		return "", err
+	}
+
+	// Update Cache
+	api.userAuthCache[username] = user.AuthHash
+
+	return api.userAuthCache[username], nil
+}
+
+func (api *API) rotateUserAuthHash(username string) error {
+	// Generate Auth Hash
+	rawAuthHash, err := utils.GenerateToken(64)
+	if err != nil {
+		log.Error("Failed to generate user token: ", err)
+		return err
+	}
+
+	// Update User
+	_, err = api.db.Queries.UpdateUser(api.db.Ctx, database.UpdateUserParams{
+		UserID:   username,
+		AuthHash: fmt.Sprintf("%x", rawAuthHash),
+	})
+
+	// Update Cache
+	api.userAuthCache[username] = fmt.Sprintf("%x", rawAuthHash)
+
+	return nil
+}

database/manager.go

@@ -13,6 +13,7 @@ import (
 	log "github.com/sirupsen/logrus"
 	_ "modernc.org/sqlite"
 	"reichard.io/antholume/config"
+	_ "reichard.io/antholume/database/migrations"
 )
 
 type DBManager struct {
@@ -36,13 +37,15 @@ func NewMgr(c *config.Config) *DBManager {
 		cfg: c,
 	}
 
-	dbm.init()
+	if err := dbm.init(); err != nil {
+		log.Panic("Unable to init DB")
+	}
 
 	return dbm
 }
 
 // Init manager
-func (dbm *DBManager) init() {
+func (dbm *DBManager) init() error {
 	if dbm.cfg.DBType == "sqlite" || dbm.cfg.DBType == "memory" {
 		var dbLocation string = ":memory:"
 		if dbm.cfg.DBType == "sqlite" {
@@ -52,7 +55,8 @@ func (dbm *DBManager) init() {
 		var err error
 		dbm.DB, err = sql.Open("sqlite", dbLocation)
 		if err != nil {
-			log.Fatalf("Unable to open DB: %v", err)
+			log.Errorf("Unable to open DB: %v", err)
+			return err
 		}
 
 		// Single Open Connection
@@ -60,22 +64,26 @@ func (dbm *DBManager) init() {
 
 		// Execute DDL
 		if _, err := dbm.DB.Exec(ddl, nil); err != nil {
-			log.Fatalf("Error executing schema: %v", err)
+			log.Errorf("Error executing schema: %v", err)
+			return err
 		}
 
 		// Perform Migrations
 		err = dbm.performMigrations()
 		if err != nil && err != goose.ErrNoMigrationFiles {
-			log.Fatalf("Error running DB migrations: %v", err)
+			log.Errorf("Error running DB migrations: %v", err)
+			return err
 		}
 
 		// Cache Tables
 		dbm.CacheTempTables()
 	} else {
-		log.Fatal("Unsupported Database")
+		return fmt.Errorf("unsupported database")
 	}
 
 	dbm.Queries = New(dbm.DB)
+
+	return nil
 }
 
 // Reload manager (close DB & reinit)
@@ -87,7 +95,9 @@ func (dbm *DBManager) Reload() error {
 	}
 
 	// Reinit DB
-	dbm.init()
+	if err := dbm.init(); err != nil {
+		return err
+	}
 
 	return nil
 }

database/migrations/20240128012356_user_auth_hash.go

@@ -0,0 +1,63 @@
+package migrations
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"github.com/pressly/goose/v3"
+	"reichard.io/antholume/utils"
+)
+
+func init() {
+	goose.AddMigrationContext(upUserAuthHash, downUserAuthHash)
+}
+
+func upUserAuthHash(ctx context.Context, tx *sql.Tx) error {
+	// Create now column
+	_, err := tx.Exec("ALTER TABLE users ADD COLUMN auth_hash TEXT")
+	if err != nil {
+		return err
+	}
+
+	// Get current users
+	rows, err := tx.Query("SELECT id FROM users")
+	if err != nil {
+		return err
+	}
+
+	// Query existing users
+	var users []string
+	for rows.Next() {
+		var user string
+		if err := rows.Scan(&user); err != nil {
+			return err
+		}
+		users = append(users, user)
+	}
+
+	// Create auth hash per user
+	for _, user := range users {
+		rawAuthHash, err := utils.GenerateToken(64)
+		if err != nil {
+			return err
+		}
+
+		authHash := fmt.Sprintf("%x", rawAuthHash)
+		_, err = tx.Exec("UPDATE users SET auth_hash = ? WHERE id = ?", authHash, user)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func downUserAuthHash(ctx context.Context, tx *sql.Tx) error {
+	// Drop column
+	_, err := tx.Exec("ALTER users DROP COLUMN auth_hash")
+	if err != nil {
+		return err
+	}
+	return nil
+}

database/migrations/README.md

@@ -1,5 +1,9 @@
 # DB Migrations
 
 ```bash
+# SQL migration
 goose create migration_name sql
+
+# Go migration
+goose create migration_name
 ```

database/models.go

@@ -96,6 +96,7 @@ type Metadatum struct {
 type User struct {
 	ID         string  `json:"id"`
 	Pass       *string `json:"-"`
+	AuthHash   string  `json:"auth_hash"`
 	Admin      bool    `json:"-"`
 	TimeOffset *string `json:"time_offset"`
 	CreatedAt  string  `json:"created_at"`

database/query.sql

@@ -26,8 +26,8 @@ VALUES (?, ?, ?, ?, ?, ?, ?, ?)
 RETURNING *;
 
 -- name: CreateUser :execrows
-INSERT INTO users (id, pass)
+INSERT INTO users (id, pass, auth_hash)
-VALUES (?, ?)
+VALUES (?, ?, ?)
 ON CONFLICT DO NOTHING;
 
 -- name: DeleteDocument :execrows
@@ -368,6 +368,7 @@ RETURNING *;
 UPDATE users
 SET
     pass = COALESCE($password, pass),
+    auth_hash = COALESCE($auth_hash, auth_hash),
     time_offset = COALESCE($time_offset, time_offset)
 WHERE id = $user_id
 RETURNING *;

database/query.sql.go

@@ -113,18 +113,19 @@ func (q *Queries) AddMetadata(ctx context.Context, arg AddMetadataParams) (Metad
 }
 
 const createUser = `-- name: CreateUser :execrows
-INSERT INTO users (id, pass)
+INSERT INTO users (id, pass, auth_hash)
-VALUES (?, ?)
+VALUES (?, ?, ?)
 ON CONFLICT DO NOTHING
 `
 
 type CreateUserParams struct {
 	ID       string  `json:"id"`
 	Pass     *string `json:"-"`
+	AuthHash string  `json:"auth_hash"`
 }
 
 func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (int64, error) {
-	result, err := q.db.ExecContext(ctx, createUser, arg.ID, arg.Pass)
+	result, err := q.db.ExecContext(ctx, createUser, arg.ID, arg.Pass, arg.AuthHash)
 	if err != nil {
 		return 0, err
 	}
@@ -954,7 +955,7 @@ func (q *Queries) GetProgress(ctx context.Context, arg GetProgressParams) ([]Get
 }
 
 const getUser = `-- name: GetUser :one
-SELECT id, pass, admin, time_offset, created_at FROM users
+SELECT id, pass, auth_hash, admin, time_offset, created_at FROM users
 WHERE id = ?1 LIMIT 1
 `
 
@@ -964,6 +965,7 @@ func (q *Queries) GetUser(ctx context.Context, userID string) (User, error) {
 	err := row.Scan(
 		&i.ID,
 		&i.Pass,
+		&i.AuthHash,
 		&i.Admin,
 		&i.TimeOffset,
 		&i.CreatedAt,
@@ -1092,7 +1094,7 @@ func (q *Queries) GetUserStreaks(ctx context.Context, userID string) ([]UserStre
 }
 
 const getUsers = `-- name: GetUsers :many
-SELECT id, pass, admin, time_offset, created_at FROM users
+SELECT id, pass, auth_hash, admin, time_offset, created_at FROM users
 `
 
 func (q *Queries) GetUsers(ctx context.Context) ([]User, error) {
@@ -1107,6 +1109,7 @@ func (q *Queries) GetUsers(ctx context.Context) ([]User, error) {
 		if err := rows.Scan(
 			&i.ID,
 			&i.Pass,
+			&i.AuthHash,
 			&i.Admin,
 			&i.TimeOffset,
 			&i.CreatedAt,
@@ -1214,23 +1217,31 @@ const updateUser = `-- name: UpdateUser :one
 UPDATE users
 SET
     pass = COALESCE(?1, pass),
-    time_offset = COALESCE(?2, time_offset)
+    auth_hash = COALESCE(?2, auth_hash),
-WHERE id = ?3
+    time_offset = COALESCE(?3, time_offset)
-RETURNING id, pass, admin, time_offset, created_at
+WHERE id = ?4
+RETURNING id, pass, auth_hash, admin, time_offset, created_at
 `
 
 type UpdateUserParams struct {
 	Password   *string `json:"-"`
+	AuthHash   string  `json:"auth_hash"`
 	TimeOffset *string `json:"time_offset"`
 	UserID     string  `json:"user_id"`
 }
 
 func (q *Queries) UpdateUser(ctx context.Context, arg UpdateUserParams) (User, error) {
-	row := q.db.QueryRowContext(ctx, updateUser, arg.Password, arg.TimeOffset, arg.UserID)
+	row := q.db.QueryRowContext(ctx, updateUser,
+		arg.Password,
+		arg.AuthHash,
+		arg.TimeOffset,
+		arg.UserID,
+	)
 	var i User
 	err := row.Scan(
 		&i.ID,
 		&i.Pass,
+		&i.AuthHash,
 		&i.Admin,
 		&i.TimeOffset,
 		&i.CreatedAt,

database/schema.sql

@@ -10,6 +10,7 @@ CREATE TABLE IF NOT EXISTS users (
     id TEXT NOT NULL PRIMARY KEY,
 
     pass TEXT NOT NULL,
+    auth_hash TEXT NOT NULL,
     admin BOOLEAN NOT NULL DEFAULT 0 CHECK (admin IN (0, 1)),
     time_offset TEXT NOT NULL DEFAULT '0 hours',
 

utils/utils.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"bytes"
 	"crypto/md5"
+	"crypto/rand"
 	"fmt"
 	"io"
 	"os"
@@ -42,3 +43,13 @@ func CalculatePartialMD5(filePath string) (string, error) {
 	allBytes := buf.Bytes()
 	return fmt.Sprintf("%x", md5.Sum(allBytes)), nil
 }
+
+// Creates a token of n size
+func GenerateToken(n int) ([]byte, error) {
+	b := make([]byte, n)
+	_, err := rand.Read(b)
+	if err != nil {
+		return nil, err
+	}
+	return b, nil
+}