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// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package app
import (
"net/http"
"strings"
"github.com/mattermost/mattermost-server/model"
"github.com/mattermost/mattermost-server/utils"
)
type TokenLocation int
const (
TokenLocationNotFound = iota
TokenLocationHeader
TokenLocationCookie
TokenLocationQueryString
)
func (tl TokenLocation) String() string {
switch tl {
case TokenLocationNotFound:
return "Not Found"
case TokenLocationHeader:
return "Header"
case TokenLocationCookie:
return "Cookie"
case TokenLocationQueryString:
return "QueryString"
default:
return "Unknown"
}
}
func (a *App) IsPasswordValid(password string) *model.AppError {
return utils.IsPasswordValidWithSettings(password, &a.Config().PasswordSettings)
}
func (a *App) CheckPasswordAndAllCriteria(user *model.User, password string, mfaToken string) *model.AppError {
if err := a.CheckUserPreflightAuthenticationCriteria(user, mfaToken); err != nil {
return err
}
if err := a.checkUserPassword(user, password); err != nil {
return err
}
if err := a.CheckUserPostflightAuthenticationCriteria(user); err != nil {
return err
}
return nil
}
// This to be used for places we check the users password when they are already logged in
func (a *App) doubleCheckPassword(user *model.User, password string) *model.AppError {
if err := checkUserLoginAttempts(user, *a.Config().ServiceSettings.MaximumLoginAttempts); err != nil {
return err
}
if err := a.checkUserPassword(user, password); err != nil {
return err
}
return nil
}
func (a *App) checkUserPassword(user *model.User, password string) *model.AppError {
if !model.ComparePassword(user.Password, password) {
if result := <-a.Srv.Store.User().UpdateFailedPasswordAttempts(user.Id, user.FailedAttempts+1); result.Err != nil {
return result.Err
}
return model.NewAppError("checkUserPassword", "api.user.check_user_password.invalid.app_error", nil, "user_id="+user.Id, http.StatusUnauthorized)
}
if result := <-a.Srv.Store.User().UpdateFailedPasswordAttempts(user.Id, 0); result.Err != nil {
return result.Err
}
return nil
}
func (a *App) checkLdapUserPasswordAndAllCriteria(ldapId *string, password string, mfaToken string) (*model.User, *model.AppError) {
if a.Ldap == nil || ldapId == nil {
err := model.NewAppError("doLdapAuthentication", "api.user.login_ldap.not_available.app_error", nil, "", http.StatusNotImplemented)
return nil, err
}
ldapUser, err := a.Ldap.DoLogin(*ldapId, password)
if err != nil {
err.StatusCode = http.StatusUnauthorized
return nil, err
}
if err := a.CheckUserMfa(ldapUser, mfaToken); err != nil {
return nil, err
}
if err := checkUserNotDisabled(ldapUser); err != nil {
return nil, err
}
// user successfully authenticated
return ldapUser, nil
}
func (a *App) CheckUserAllAuthenticationCriteria(user *model.User, mfaToken string) *model.AppError {
if err := a.CheckUserPreflightAuthenticationCriteria(user, mfaToken); err != nil {
return err
}
if err := a.CheckUserPostflightAuthenticationCriteria(user); err != nil {
return err
}
return nil
}
func (a *App) CheckUserPreflightAuthenticationCriteria(user *model.User, mfaToken string) *model.AppError {
if err := a.CheckUserMfa(user, mfaToken); err != nil {
return err
}
if err := checkUserNotDisabled(user); err != nil {
return err
}
if err := checkUserLoginAttempts(user, *a.Config().ServiceSettings.MaximumLoginAttempts); err != nil {
return err
}
return nil
}
func (a *App) CheckUserPostflightAuthenticationCriteria(user *model.User) *model.AppError {
if !user.EmailVerified && a.Config().EmailSettings.RequireEmailVerification {
return model.NewAppError("Login", "api.user.login.not_verified.app_error", nil, "user_id="+user.Id, http.StatusUnauthorized)
}
return nil
}
func (a *App) CheckUserMfa(user *model.User, token string) *model.AppError {
if license := a.License(); !user.MfaActive || license == nil || !*license.Features.MFA || !*a.Config().ServiceSettings.EnableMultifactorAuthentication {
return nil
}
if a.Mfa == nil {
return model.NewAppError("checkUserMfa", "api.user.check_user_mfa.not_available.app_error", nil, "", http.StatusNotImplemented)
}
ok, err := a.Mfa.ValidateToken(user.MfaSecret, token)
if err != nil {
return err
}
if !ok {
return model.NewAppError("checkUserMfa", "api.user.check_user_mfa.bad_code.app_error", nil, "", http.StatusUnauthorized)
}
return nil
}
func checkUserLoginAttempts(user *model.User, max int) *model.AppError {
if user.FailedAttempts >= max {
return model.NewAppError("checkUserLoginAttempts", "api.user.check_user_login_attempts.too_many.app_error", nil, "user_id="+user.Id, http.StatusUnauthorized)
}
return nil
}
func checkUserNotDisabled(user *model.User) *model.AppError {
if user.DeleteAt > 0 {
return model.NewAppError("Login", "api.user.login.inactive.app_error", nil, "user_id="+user.Id, http.StatusUnauthorized)
}
return nil
}
func (a *App) authenticateUser(user *model.User, password, mfaToken string) (*model.User, *model.AppError) {
ldapAvailable := *a.Config().LdapSettings.Enable && a.Ldap != nil
if user.AuthService == model.USER_AUTH_SERVICE_LDAP {
if !ldapAvailable {
err := model.NewAppError("login", "api.user.login_ldap.not_available.app_error", nil, "", http.StatusNotImplemented)
return user, err
}
ldapUser, err := a.checkLdapUserPasswordAndAllCriteria(user.AuthData, password, mfaToken)
if err != nil {
err.StatusCode = http.StatusUnauthorized
return user, err
}
// slightly redundant to get the user again, but we need to get it from the LDAP server
return ldapUser, nil
}
if user.AuthService != "" {
authService := user.AuthService
if authService == model.USER_AUTH_SERVICE_SAML {
authService = strings.ToUpper(authService)
}
err := model.NewAppError("login", "api.user.login.use_auth_service.app_error", map[string]interface{}{"AuthService": authService}, "", http.StatusBadRequest)
return user, err
}
if err := a.CheckPasswordAndAllCriteria(user, password, mfaToken); err != nil {
err.StatusCode = http.StatusUnauthorized
return user, err
}
return user, nil
}
func ParseAuthTokenFromRequest(r *http.Request) (string, TokenLocation) {
authHeader := r.Header.Get(model.HEADER_AUTH)
// Attempt to parse the token from the cookie
if cookie, err := r.Cookie(model.SESSION_COOKIE_TOKEN); err == nil {
return cookie.Value, TokenLocationCookie
}
// Parse the token from the header
if len(authHeader) > 6 && strings.ToUpper(authHeader[0:6]) == model.HEADER_BEARER {
// Default session token
return authHeader[7:], TokenLocationHeader
}
if len(authHeader) > 5 && strings.ToLower(authHeader[0:5]) == model.HEADER_TOKEN {
// OAuth token
return authHeader[6:], TokenLocationHeader
}
// Attempt to parse token out of the query string
if token := r.URL.Query().Get("access_token"); token != "" {
return token, TokenLocationQueryString
}
return "", TokenLocationNotFound
}
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