webdav: fix caching with external auth/plugins

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

README.md

@@ -72,7 +72,7 @@ If you report an invalid issue or ask for step-by-step support, your issue will
 - Per-user authentication methods.
 - [Two-factor authentication](./docs/howto/two-factor-authentication.md) based on time-based one time passwords (RFC 6238) which works with Authy, Google Authenticator, Microsoft Authenticator and other compatible apps.
 - Simplified user administrations using [groups](./docs/groups.md).
-- [Roles](./docs/roles.md) allow you to create limited administrators who can only create and manage users with their role.
+- [Roles](./docs/roles.md) allow to create limited administrators who can only create and manage users with their role.
 - Custom authentication via [external programs/HTTP API](./docs/external-auth.md).
 - Web Client and Web Admin user interfaces support [OpenID Connect](https://openid.net/connect/) authentication and so they can be integrated with identity providers such as [Keycloak](https://www.keycloak.org/). You can find more details [here](./docs/oidc.md).
 - [Data At Rest Encryption](./docs/dare.md).

go.mod

@@ -58,7 +58,7 @@ require (
 	github.com/spf13/afero v1.9.5
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/viper v1.15.0
-	github.com/stretchr/testify v1.8.2
+	github.com/stretchr/testify v1.8.3
 	github.com/studio-b12/gowebdav v0.0.0-20230203202212-3282f94193f2
 	github.com/subosito/gotenv v1.4.2
 	github.com/unrolled/secure v1.13.0
@@ -113,7 +113,7 @@ require (
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/go-cmp v0.5.9 // indirect
-	github.com/google/s2a-go v0.1.3 // indirect
+	github.com/google/s2a-go v0.1.4 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
 	github.com/googleapis/gax-go/v2 v2.8.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
@@ -153,7 +153,7 @@ require (
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/tklauser/go-sysconf v0.3.11 // indirect
 	github.com/tklauser/numcpus v0.6.0 // indirect
-	github.com/yusufpapurcu/wmi v1.2.2 // indirect
+	github.com/yusufpapurcu/wmi v1.2.3 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	golang.org/x/mod v0.10.0 // indirect
 	golang.org/x/text v0.9.0 // indirect

go.sum

@@ -1199,8 +1199,8 @@ github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1/go.mod h1:kpwsk12EmLe
 github.com/google/pprof v0.0.0-20220318212150-b2ab0324ddda/go.mod h1:KgnwoLYCZ8IQu3XUZ8Nc/bM9CCZFOyjUNOSygVozoDg=
 github.com/google/pprof v0.0.0-20230111200839-76d1ae5aea2b/go.mod h1:dDKJzRmX4S37WGHujM7tX//fmj1uioxKzKxz3lo4HJo=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
-github.com/google/s2a-go v0.1.3 h1:FAgZmpLl/SXurPEZyCMPBIiiYeTbqfjlbdnCNTAkbGE=
-github.com/google/s2a-go v0.1.3/go.mod h1:Ej+mSEMGRnqRzjc7VtF+jdBwYG5fuJfiZ8ELkjEwM0A=
+github.com/google/s2a-go v0.1.4 h1:1kZ/sQM3srePvKs3tXAvQzo66XfcReoqFpIpIccE7Oc=
+github.com/google/s2a-go v0.1.4/go.mod h1:Ej+mSEMGRnqRzjc7VtF+jdBwYG5fuJfiZ8ELkjEwM0A=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/google/subcommands v1.0.1/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
@@ -1929,8 +1929,9 @@ github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1F
 github.com/stretchr/testify v1.7.5/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.3 h1:RP3t2pwF7cMEbC1dqtB6poj3niw/9gnV4Cjg5oW5gtY=
+github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/studio-b12/gowebdav v0.0.0-20230203202212-3282f94193f2 h1:VsBj3UD2xyAOu7kJw6O/2jjG2UXLFoBzihqDU9Ofg9M=
 github.com/studio-b12/gowebdav v0.0.0-20230203202212-3282f94193f2/go.mod h1:bHA7t77X/QFExdeAnDzK6vKM34kEZAcE1OX4MfiwjkE=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
@@ -1997,8 +1998,9 @@ github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9dec
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/yusufpapurcu/wmi v1.2.2 h1:KBNDSne4vP5mbSWnJbO+51IMOXJB67QiYCSBrubbPRg=
 github.com/yusufpapurcu/wmi v1.2.2/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
+github.com/yusufpapurcu/wmi v1.2.3 h1:E1ctvB7uKFMOJw3fdOW32DwGE9I7t++CRUEMKvFoFiw=
+github.com/yusufpapurcu/wmi v1.2.3/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
 github.com/yvasiyarov/go-metrics v0.0.0-20140926110328-57bccd1ccd43/go.mod h1:aX5oPXxHm3bOH+xeAttToC8pqch2ScQN/JoXYupl6xs=
 github.com/yvasiyarov/gorelic v0.0.0-20141212073537-a9bba5b9ab50/go.mod h1:NUSPSUX/bi6SeDMUh6brw0nXpxHnc96TguQh0+r/ssA=
 github.com/yvasiyarov/newrelic_platform_go v0.0.0-20140908184405-b21fdbd4370f/go.mod h1:GlGEuHIJweS1mbCqG+7vt2nvWLzLLnRHbXz5JKd/Qbg=

internal/dataprovider/cacheduser.go

@@ -77,7 +77,7 @@ func (cache *usersCache) updateLastLogin(username string) {
 // swapWebDAVUser updates an existing cached user with the specified one
 // preserving the lock fs if possible
 // FIXME: this could be racy in rare cases
-func (cache *usersCache) swap(userRef *User) {
+func (cache *usersCache) swap(userRef *User, plainPassword string) {
 	user := userRef.getACopy()
 	err := user.LoadAndApplyGroupSettings()
 
@@ -85,6 +85,15 @@ func (cache *usersCache) swap(userRef *User) {
 	defer cache.Unlock()
 
 	if cachedUser, ok := cache.users[user.Username]; ok {
+		if err != nil {
+			providerLog(logger.LevelDebug, "unable to load group settings, for user %q, removing from cache, err :%v",
+				user.Username, err)
+			delete(cache.users, user.Username)
+			return
+		}
+		if plainPassword != "" {
+			cachedUser.Password = plainPassword
+		} else {
 			if cachedUser.User.Password != user.Password {
 				providerLog(logger.LevelDebug, "current password different from the cached one for user %q, removing from cache",
 					user.Username)
@@ -92,11 +101,6 @@ func (cache *usersCache) swap(userRef *User) {
 				delete(cache.users, user.Username)
 				return
 			}
-		if err != nil {
-			providerLog(logger.LevelDebug, "unable to load group settings, for user %q, removing from cache, err :%v",
-				user.Username, err)
-			delete(cache.users, user.Username)
-			return
 		}
 		if cachedUser.User.isFsEqual(&user) {
 			// the updated user has the same fs as the cached one, we can preserve the lock filesystem
@@ -154,7 +158,10 @@ func (cache *usersCache) get(username string) (*CachedUser, bool) {
 	defer cache.RUnlock()
 
 	cachedUser, ok := cache.users[username]
-	return &cachedUser, ok
+	if !ok {
+		return nil, false
+	}
+	return &cachedUser, true
 }
 
 // CacheWebDAVUser add a user to the WebDAV cache

internal/dataprovider/dataprovider.go

@@ -1103,38 +1103,47 @@ func CheckAdminAndPass(username, password, ip string) (Admin, error) {
 }
 
 // CheckCachedUserCredentials checks the credentials for a cached user
-func CheckCachedUserCredentials(user *CachedUser, password, loginMethod, protocol string, tlsCert *x509.Certificate) error {
+func CheckCachedUserCredentials(user *CachedUser, password, ip, loginMethod, protocol string, tlsCert *x509.Certificate) (*CachedUser, *User, error) {
+	if !user.User.skipExternalAuth() && isExternalAuthConfigured(loginMethod) {
+		u, _, err := CheckCompositeCredentials(user.User.Username, password, ip, loginMethod, protocol, tlsCert)
+		if err != nil {
+			return nil, nil, err
+		}
+		webDAVUsersCache.swap(&u, password)
+		cu, _ := webDAVUsersCache.get(u.Username)
+		return cu, &u, nil
+	}
 	if err := user.User.CheckLoginConditions(); err != nil {
-		return err
+		return user, nil, err
 	}
 	if loginMethod == LoginMethodPassword && user.User.Filters.IsAnonymous {
-		return nil
+		return user, nil, nil
 	}
 	if loginMethod != LoginMethodPassword {
 		_, err := checkUserAndTLSCertificate(&user.User, protocol, tlsCert)
 		if err != nil {
-			return err
+			return user, nil, err
 		}
 		if loginMethod == LoginMethodTLSCertificate {
 			if !user.User.IsLoginMethodAllowed(LoginMethodTLSCertificate, protocol, nil) {
-				return fmt.Errorf("certificate login method is not allowed for user %q", user.User.Username)
+				return user, nil, fmt.Errorf("certificate login method is not allowed for user %q", user.User.Username)
 			}
-			return nil
+			return user, nil, nil
 		}
 	}
 	if password == "" {
-		return ErrInvalidCredentials
+		return user, nil, ErrInvalidCredentials
 	}
 	if user.Password != "" {
 		if password == user.Password {
-			return nil
+			return user, nil, nil
 		}
 	} else {
 		if ok, _ := isPasswordOK(&user.User, password); ok {
-			return nil
+			return user, nil, nil
 		}
 	}
-	return ErrInvalidCredentials
+	return user, nil, ErrInvalidCredentials
 }
 
 // CheckCompositeCredentials checks multiple credentials.
@@ -1689,7 +1698,7 @@ func DeleteRole(name string, executor, ipAddress, executorRole string) error {
 			provider.setUpdatedAt(user)
 			u, err := provider.userExists(user, "")
 			if err == nil {
-				webDAVUsersCache.swap(&u)
+				webDAVUsersCache.swap(&u, "")
 				executeAction(operationUpdate, executor, ipAddress, actionObjectUser, u.Username, u.Role, &u)
 			}
 		}
@@ -1721,7 +1730,7 @@ func UpdateGroup(group *Group, users []string, executor, ipAddress, role string)
 			provider.setUpdatedAt(user)
 			u, err := provider.userExists(user, "")
 			if err == nil {
-				webDAVUsersCache.swap(&u)
+				webDAVUsersCache.swap(&u, "")
 			} else {
 				RemoveCachedWebDAVUser(user)
 			}
@@ -2073,7 +2082,7 @@ func UpdateUserPassword(username, plainPwd, executor, ipAddress, role string) er
 	if err := provider.updateUser(&user); err != nil {
 		return err
 	}
-	webDAVUsersCache.swap(&user)
+	webDAVUsersCache.swap(&user, plainPwd)
 	executeAction(operationUpdate, executor, ipAddress, actionObjectUser, username, role, &user)
 	return nil
 }
@@ -2085,7 +2094,7 @@ func UpdateUser(user *User, executor, ipAddress, role string) error {
 	}
 	err := provider.updateUser(user)
 	if err == nil {
-		webDAVUsersCache.swap(user)
+		webDAVUsersCache.swap(user, "")
 		executeAction(operationUpdate, executor, ipAddress, actionObjectUser, user.Username, role, user)
 	}
 	return err
@@ -2252,7 +2261,7 @@ func UpdateFolder(folder *vfs.BaseVirtualFolder, users []string, groups []string
 			provider.setUpdatedAt(user)
 			u, err := provider.userExists(user, "")
 			if err == nil {
-				webDAVUsersCache.swap(&u)
+				webDAVUsersCache.swap(&u, "")
 				executeAction(operationUpdate, executor, ipAddress, actionObjectUser, u.Username, u.Role, &u)
 			} else {
 				RemoveCachedWebDAVUser(user)
@@ -3950,7 +3959,7 @@ func executePreLoginHook(username, loginMethod, ip, protocol string, oidcTokenFi
 		u.Filters.RecoveryCodes = recoveryCodes
 		err = provider.updateUser(&u)
 		if err == nil {
-			webDAVUsersCache.swap(&u)
+			webDAVUsersCache.swap(&u, "")
 		}
 	}
 	if err != nil {
@@ -4123,11 +4132,7 @@ func doExternalAuth(username, password string, pubKey []byte, keyboardInteractiv
 		return user, err
 	}
 
-	if mergedUser.Filters.Hooks.ExternalAuthDisabled {
-		return u, nil
-	}
-
-	if mergedUser.isExternalAuthCached() {
+	if mergedUser.skipExternalAuth() {
 		return u, nil
 	}
 
@@ -4184,7 +4189,9 @@ func doExternalAuth(username, password string, pubKey []byte, keyboardInteractiv
 		user.Filters.RecoveryCodes = u.Filters.RecoveryCodes
 		err = provider.updateUser(&user)
 		if err == nil {
-			webDAVUsersCache.swap(&user)
+			if protocol != protocolWebDAV {
+				webDAVUsersCache.swap(&user, password)
+			}
 			cachedUserPasswords.Add(user.Username, password, user.Password)
 		}
 		return user, err
@@ -4206,11 +4213,7 @@ func doPluginAuth(username, password string, pubKey []byte, ip, protocol string,
 		return user, err
 	}
 
-	if mergedUser.Filters.Hooks.ExternalAuthDisabled {
-		return u, nil
-	}
-
-	if mergedUser.isExternalAuthCached() {
+	if mergedUser.skipExternalAuth() {
 		return u, nil
 	}
 
@@ -4257,7 +4260,9 @@ func doPluginAuth(username, password string, pubKey []byte, ip, protocol string,
 		user.Filters.RecoveryCodes = u.Filters.RecoveryCodes
 		err = provider.updateUser(&user)
 		if err == nil {
-			webDAVUsersCache.swap(&user)
+			if protocol != protocolWebDAV {
+				webDAVUsersCache.swap(&user, password)
+			}
 			cachedUserPasswords.Add(user.Username, password, user.Password)
 		}
 		return user, err
@@ -4313,6 +4318,33 @@ func isLastActivityRecent(lastActivity int64, minDelay time.Duration) bool {
 	return diff < minDelay
 }
 
+func isExternalAuthConfigured(loginMethod string) bool {
+	if config.ExternalAuthHook != "" {
+		if config.ExternalAuthScope == 0 {
+			return true
+		}
+		switch loginMethod {
+		case LoginMethodPassword:
+			return config.ExternalAuthScope&1 != 0
+		case LoginMethodTLSCertificate:
+			return config.ExternalAuthScope&8 != 0
+		case LoginMethodTLSCertificateAndPwd:
+			return config.ExternalAuthScope&1 != 0 || config.ExternalAuthScope&8 != 0
+		}
+	}
+	switch loginMethod {
+	case LoginMethodPassword:
+		return plugin.Handler.HasAuthScope(plugin.AuthScopePassword)
+	case LoginMethodTLSCertificate:
+		return plugin.Handler.HasAuthScope(plugin.AuthScopeTLSCertificate)
+	case LoginMethodTLSCertificateAndPwd:
+		return plugin.Handler.HasAuthScope(plugin.AuthScopePassword) ||
+			plugin.Handler.HasAuthScope(plugin.AuthScopeTLSCertificate)
+	default:
+		return false
+	}
+}
+
 func getConfigPath(name, configDir string) string {
 	if !util.IsFileInputValid(name) {
 		return ""

internal/dataprovider/scheduler.go

@@ -130,7 +130,7 @@ func checkUserCache() {
 			cachedUserPasswords.Remove(user.Username)
 			delayedQuotaUpdater.resetUserQuota(user.Username)
 		} else {
-			webDAVUsersCache.swap(&user)
+			webDAVUsersCache.swap(&user, "")
 		}
 	}
 	lastUserCacheUpdate.Store(checkTime)

internal/dataprovider/user.go

@@ -1039,14 +1039,16 @@ func (u *User) CanManageMFA() bool {
 	return len(mfa.GetAvailableTOTPConfigs()) > 0
 }
 
-func (u *User) isExternalAuthCached() bool {
+func (u *User) skipExternalAuth() bool {
+	if u.Filters.Hooks.ExternalAuthDisabled {
+		return true
+	}
 	if u.ID <= 0 {
 		return false
 	}
 	if u.Filters.ExternalAuthCacheTime <= 0 {
 		return false
 	}
-
 	return isLastActivityRecent(u.LastLogin, time.Duration(u.Filters.ExternalAuthCacheTime)*time.Second)
 }
 

internal/webdavd/internal_test.go

@@ -1694,3 +1694,10 @@ func TestConfigsFromProvider(t *testing.T) {
 	err = dataprovider.UpdateConfigs(nil, "", "", "")
 	assert.NoError(t, err)
 }
+
+func TestGetCacheExpirationTime(t *testing.T) {
+	c := UsersCacheConfig{}
+	assert.True(t, c.getExpirationTime().IsZero())
+	c.ExpirationTime = 1
+	assert.False(t, c.getExpirationTime().IsZero())
+}

internal/webdavd/server.go

@@ -299,8 +299,20 @@ func (s *webDavServer) authenticate(r *http.Request, ip string) (dataprovider.Us
 				tlsCert = nil
 				loginMethod = dataprovider.LoginMethodPassword
 			}
-			if err := dataprovider.CheckCachedUserCredentials(cachedUser, password, loginMethod, common.ProtocolWebDAV, tlsCert); err == nil {
-				return cachedUser.User, true, cachedUser.LockSystem, loginMethod, nil
+			cu, u, err := dataprovider.CheckCachedUserCredentials(cachedUser, password, ip, loginMethod, common.ProtocolWebDAV, tlsCert)
+			if err == nil {
+				if cu != nil {
+					return cu.User, true, cu.LockSystem, loginMethod, nil
+				}
+				lockSystem := webdav.NewMemLS()
+				cachedUser = &dataprovider.CachedUser{
+					User:       *u,
+					Password:   password,
+					LockSystem: lockSystem,
+					Expiration: s.config.Cache.Users.getExpirationTime(),
+				}
+				dataprovider.CacheWebDAVUser(cachedUser)
+				return cachedUser.User, false, cachedUser.LockSystem, loginMethod, nil
 			}
 			updateLoginMetrics(&cachedUser.User, ip, loginMethod, dataprovider.ErrInvalidCredentials)
 			return user, false, nil, loginMethod, dataprovider.ErrInvalidCredentials
@@ -318,9 +330,7 @@ func (s *webDavServer) authenticate(r *http.Request, ip string) (dataprovider.Us
 		User:       user,
 		Password:   password,
 		LockSystem: lockSystem,
-	}
-	if s.config.Cache.Users.ExpirationTime > 0 {
-		cachedUser.Expiration = time.Now().Add(time.Duration(s.config.Cache.Users.ExpirationTime) * time.Minute)
+		Expiration: s.config.Cache.Users.getExpirationTime(),
 	}
 	dataprovider.CacheWebDAVUser(cachedUser)
 	return user, false, lockSystem, loginMethod, nil

internal/webdavd/webdavd.go

@@ -85,6 +85,13 @@ type UsersCacheConfig struct {
 	MaxSize        int `json:"max_size" mapstructure:"max_size"`
 }
 
+func (c *UsersCacheConfig) getExpirationTime() time.Time {
+	if c.ExpirationTime > 0 {
+		return time.Now().Add(time.Duration(c.ExpirationTime) * time.Minute)
+	}
+	return time.Time{}
+}
+
 // MimeCacheConfig defines the cache configuration for mime types
 type MimeCacheConfig struct {
 	Enabled        bool                `json:"enabled" mapstructure:"enabled"`

internal/webdavd/webdavd_test.go

@@ -1186,7 +1186,7 @@ func TestLoginExternalAuth(t *testing.T) {
 	err = config.LoadConfig(configDir, "")
 	assert.NoError(t, err)
 	providerConf := config.GetProviderConf()
-	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u), os.ModePerm)
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, ""), os.ModePerm)
 	assert.NoError(t, err)
 	providerConf.ExternalAuthHook = extAuthPath
 	providerConf.ExternalAuthScope = 0
@@ -1215,6 +1215,56 @@ func TestLoginExternalAuth(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func TestExternalAuthPasswordChange(t *testing.T) {
+	if runtime.GOOS == osWindows {
+		t.Skip("this test is not available on Windows")
+	}
+	u := getTestUser()
+	err := dataprovider.Close()
+	assert.NoError(t, err)
+	err = config.LoadConfig(configDir, "")
+	assert.NoError(t, err)
+	providerConf := config.GetProviderConf()
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, defaultPassword), os.ModePerm)
+	assert.NoError(t, err)
+	providerConf.ExternalAuthHook = extAuthPath
+	providerConf.ExternalAuthScope = 0
+	err = dataprovider.Initialize(providerConf, configDir, true)
+	assert.NoError(t, err)
+	client := getWebDavClient(u, false, nil)
+	assert.NoError(t, checkBasicFunc(client))
+	u.Username = defaultUsername + "1"
+	client = getWebDavClient(u, false, nil)
+	assert.Error(t, checkBasicFunc(client))
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, defaultPassword+"1"), os.ModePerm)
+	assert.NoError(t, err)
+	client = getWebDavClient(u, false, nil)
+	assert.Error(t, checkBasicFunc(client))
+	u.Password = defaultPassword + "1"
+	client = getWebDavClient(u, false, nil)
+	assert.NoError(t, checkBasicFunc(client))
+	user, _, err := httpdtest.GetUserByUsername(defaultUsername, http.StatusOK)
+	assert.NoError(t, err)
+	assert.Equal(t, defaultUsername, user.Username)
+	_, err = httpdtest.RemoveUser(user, http.StatusOK)
+	assert.NoError(t, err)
+	err = os.RemoveAll(user.GetHomeDir())
+	assert.NoError(t, err)
+	user, _, err = httpdtest.GetUserByUsername(defaultUsername+"1", http.StatusOK)
+	assert.NoError(t, err)
+	_, err = httpdtest.RemoveUser(user, http.StatusOK)
+	assert.NoError(t, err)
+	err = dataprovider.Close()
+	assert.NoError(t, err)
+	err = config.LoadConfig(configDir, "")
+	assert.NoError(t, err)
+	providerConf = config.GetProviderConf()
+	err = dataprovider.Initialize(providerConf, configDir, true)
+	assert.NoError(t, err)
+	err = os.Remove(extAuthPath)
+	assert.NoError(t, err)
+}
+
 func TestExternalAuthReturningAnonymousUser(t *testing.T) {
 	if runtime.GOOS == osWindows {
 		t.Skip("this test is not available on Windows")
@@ -1228,7 +1278,7 @@ func TestExternalAuthReturningAnonymousUser(t *testing.T) {
 	err = config.LoadConfig(configDir, "")
 	assert.NoError(t, err)
 	providerConf := config.GetProviderConf()
-	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u), os.ModePerm)
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, ""), os.ModePerm)
 	assert.NoError(t, err)
 	providerConf.ExternalAuthHook = extAuthPath
 	providerConf.ExternalAuthScope = 0
@@ -1320,7 +1370,7 @@ func TestExternalAuthAnonymousGroupInheritance(t *testing.T) {
 	err = config.LoadConfig(configDir, "")
 	assert.NoError(t, err)
 	providerConf := config.GetProviderConf()
-	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u), os.ModePerm)
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, ""), os.ModePerm)
 	assert.NoError(t, err)
 	providerConf.ExternalAuthHook = extAuthPath
 	providerConf.ExternalAuthScope = 0
@@ -2880,7 +2930,7 @@ func TestExternatAuthWithClientCert(t *testing.T) {
 	err = config.LoadConfig(configDir, "")
 	assert.NoError(t, err)
 	providerConf := config.GetProviderConf()
-	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u), os.ModePerm)
+	err = os.WriteFile(extAuthPath, getExtAuthScriptContent(u, ""), os.ModePerm)
 	assert.NoError(t, err)
 	providerConf.ExternalAuthHook = extAuthPath
 	providerConf.ExternalAuthScope = 0
@@ -3371,11 +3421,15 @@ func getEncryptedFileSize(size int64) (int64, error) {
 	return int64(encSize) + 33, err
 }
 
-func getExtAuthScriptContent(user dataprovider.User) []byte {
+func getExtAuthScriptContent(user dataprovider.User, password string) []byte {
 	extAuthContent := []byte("#!/bin/sh\n\n")
-	extAuthContent = append(extAuthContent, []byte(fmt.Sprintf("if test \"$SFTPGO_AUTHD_USERNAME\" = \"%v\"; then\n", user.Username))...)
+	if password != "" {
+		extAuthContent = append(extAuthContent, []byte(fmt.Sprintf("if test \"$SFTPGO_AUTHD_USERNAME\" = \"%s\" -a \"$SFTPGO_AUTHD_PASSWORD\" = \"%s\"; then\n", user.Username, password))...)
+	} else {
+		extAuthContent = append(extAuthContent, []byte(fmt.Sprintf("if test \"$SFTPGO_AUTHD_USERNAME\" = \"%s\"; then\n", user.Username))...)
+	}
 	u, _ := json.Marshal(user)
-	extAuthContent = append(extAuthContent, []byte(fmt.Sprintf("echo '%v'\n", string(u)))...)
+	extAuthContent = append(extAuthContent, []byte(fmt.Sprintf("echo '%s'\n", string(u)))...)
 	extAuthContent = append(extAuthContent, []byte("else\n")...)
 	extAuthContent = append(extAuthContent, []byte("echo '{\"username\":\"\"}'\n")...)
 	extAuthContent = append(extAuthContent, []byte("fi\n")...)