initial commit

pkg/db/user.go

@@ -0,0 +1,220 @@
+// Copyright (C) 2022 Marius Schellenberger
+
+package db
+
+import (
+	"errors"
+	"regexp"
+	"sort"
+	"strconv"
+
+	"git.giftfish.de/ston1th/goacc/pkg/core"
+	"git.giftfish.de/ston1th/goacc/pkg/otp"
+	"git.giftfish.de/ston1th/jwt/v3"
+	"golang.org/x/crypto/bcrypt"
+)
+
+const userPrefix = "user/"
+
+var (
+	errUserLocked   = errors.New("db: user locked")
+	errUserLogin    = errors.New("db: wrong login")
+	errUserPin      = errors.New("db: wrong pin")
+	errUserExists   = errors.New("db: user already exist")
+	errNameReserved = errors.New("db: name is reserved")
+
+	userRe = regexp.MustCompile("[^a-zA-Z0-9]+")
+)
+
+func (db *DB) GetUsers() (users core.Users, err error) {
+	err = db.store.ForEachPrefix(userPrefix, func(k string, _ []byte) error {
+		u, err := db.GetUser(k)
+		u.Password = ""
+		if err == nil {
+			users = append(users, u)
+		}
+		return nil
+	})
+	sort.Sort(users)
+	return
+}
+
+func (db *DB) GetUserWithoutPassword(username string) (u *core.User, err error) {
+	u, err = db.GetUser(username)
+	u.Password = ""
+	return
+}
+
+func (db *DB) GetUserSecret(username string) (secret string, err error) {
+	var user *core.User
+	user, err = db.GetUser(username)
+	secret = user.Secret
+	return
+}
+
+func (db *DB) GetUser(username string) (u *core.User, err error) {
+	u = new(core.User)
+	err = db.store.Get(userPrefix+username, u)
+	return
+}
+
+func (db *DB) UserExists(username string) error {
+	return db.store.Get(userPrefix+username, nil)
+}
+
+func (db *DB) CreateUser(username, email, password string, admin bool) error {
+	username = userRe.ReplaceAllString(username, "")
+	if err := db.UserExists(username); err == nil {
+		return errUserExists
+	}
+	hash, err := bcrypt.GenerateFromPassword(validatePassword(password), bcryptCost)
+	if err != nil {
+		return err
+	}
+	return db.store.Set(userPrefix+username, &core.User{
+		Username: username,
+		Email:    email,
+		Password: string(hash),
+		Created:  strconv.Itoa(int(jwt.Now())),
+		Admin:    admin,
+	})
+}
+
+func (db *DB) Login(username, password string) (u *core.User, err error) {
+	if username == defUser && !db.admin {
+		err = errors.New("db: user disabled")
+		return
+	}
+	u, err = db.GetUser(username)
+	if err != nil {
+		return
+	}
+	if u.Locked == 3 {
+		err = errUserLocked
+		return
+	}
+	if err = bcrypt.CompareHashAndPassword([]byte(u.Password), validatePassword(password)); err != nil {
+		u.Locked++
+		err = db.store.Set(userPrefix+username, u)
+		if err != nil {
+			return
+		}
+		err = errUserLogin
+		return
+	}
+	if u.Locked > 0 {
+		u.Locked = 0
+		err = db.store.Set(userPrefix+username, u)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (db *DB) Totp(username, pin string) (u *core.User, err error) {
+	u, err = db.GetUser(username)
+	if err != nil {
+		return
+	}
+	if u.Locked == 3 {
+		err = errUserLocked
+		return
+	}
+	if !otp.Validate(pin, u.Secret) {
+		u.Locked++
+		err = db.store.Set(userPrefix+username, u)
+		if err != nil {
+			return
+		}
+		err = errUserPin
+		return
+	}
+	if u.Locked > 0 {
+		u.Locked = 0
+		err = db.store.Set(userPrefix+username, u)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (db *DB) UnlockUser(username string) (err error) {
+	var u *core.User
+	u, err = db.GetUser(username)
+	if err != nil {
+		return
+	}
+	if u.Locked > 0 {
+		u.Locked = 0
+		err = db.store.Set(userPrefix+username, u)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (db *DB) UpdateUserSecret(username, secret string) error {
+	u, err := db.GetUser(username)
+	if err != nil {
+		return err
+	}
+	u.Secret = secret
+	return db.store.Set(userPrefix+username, u)
+}
+
+func (db *DB) UpdateUserPassword(username, password string) error {
+	if password == "" {
+		return errors.New("empty password")
+	}
+	u, err := db.GetUser(username)
+	if err != nil {
+		return err
+	}
+	hash, err := bcrypt.GenerateFromPassword(validatePassword(password), bcryptCost)
+	if err != nil {
+		return err
+	}
+	u.Password = string(hash)
+	return db.store.Set(userPrefix+username, u)
+}
+
+func (db *DB) ResetAdmin() error {
+	return db.UpdateUserPassword(defUser, defPassword)
+}
+
+func (db *DB) AdminUpdateUser(username, password string, admin bool) error {
+	if username == defUser && !admin {
+		return errors.New("user '" + defUser + "' cannot lose admin privileges")
+	}
+	u, err := db.GetUser(username)
+	if err != nil {
+		return err
+	}
+	u.Admin = admin
+	if password != "" {
+		hash, err := bcrypt.GenerateFromPassword(validatePassword(password), bcryptCost)
+		if err != nil {
+			return err
+		}
+		u.Password = string(hash)
+	}
+	return db.store.Set(userPrefix+username, u)
+}
+
+func (db *DB) DeleteUser(username string) error {
+	if username == defUser {
+		return errors.New("user '" + defUser + "' cannot be deleted")
+	}
+	u, err := db.GetUser(username)
+	if err != nil {
+		return err
+	}
+	err = db.store.Delete(userPrefix + username)
+	if err != nil {
+		return err
+	}
+	return db.lockout(username, u.Created)
+}