// UserExists checks if user exists when user input value in sign in form.
func (cc *CommonController) UserExists() {
target := cc.GetString("target")
value := cc.GetString("value")
user := models.User{}
switch target {
case "username":
user.Username = value
case "email":
user.Email = value
}
exist, err := dao.UserExists(user, target)
if err != nil {
log.Errorf("Error occurred in UserExists: %v", err)
cc.CustomAbort(http.StatusInternalServerError, "Internal error.")
}
cc.Data["json"] = exist
cc.ServeJSON()
}
// Authenticate checks user's credential agains LDAP based on basedn template and LDAP URL,
// if the check is successful a dummy record will be insert into DB, such that this user can
// be associated to other entities in the system.
func (l *Auth) Authenticate(m models.AuthModel) (*models.User, error) {
ldapURL := os.Getenv("LDAP_URL")
if ldapURL == "" {
return nil, errors.New("Can not get any available LDAP_URL.")
}
log.Debug("ldapURL:", ldapURL)
p := m.Principal
for _, c := range metaChars {
if strings.ContainsRune(p, c) {
return nil, fmt.Errorf("the principal contains meta char: %q", c)
}
}
ldap, err := openldap.Initialize(ldapURL)
if err != nil {
return nil, err
}
ldap.SetOption(openldap.LDAP_OPT_PROTOCOL_VERSION, openldap.LDAP_VERSION3)
ldapBaseDn := os.Getenv("LDAP_BASE_DN")
if ldapBaseDn == "" {
return nil, errors.New("Can not get any available LDAP_BASE_DN.")
}
baseDn := fmt.Sprintf(ldapBaseDn, m.Principal)
log.Debug("baseDn:", baseDn)
err = ldap.Bind(baseDn, m.Password)
if err != nil {
return nil, err
}
defer ldap.Close()
scope := openldap.LDAP_SCOPE_SUBTREE // LDAP_SCOPE_BASE, LDAP_SCOPE_ONELEVEL, LDAP_SCOPE_SUBTREE
filter := "objectClass=*"
attributes := []string{"mail"}
result, err := ldap.SearchAll(baseDn, scope, filter, attributes)
if err != nil {
return nil, err
}
u := models.User{}
if len(result.Entries()) == 1 {
en := result.Entries()[0]
for _, attr := range en.Attributes() {
val := attr.Values()[0]
if attr.Name() == "mail" {
u.Email = val
}
}
}
u.Username = m.Principal
log.Debug("username:"******",email:", u.Email)
exist, err := dao.UserExists(u, "username")
if err != nil {
return nil, err
}
if exist {
currentUser, err := dao.GetUser(u)
if err != nil {
return nil, err
}
u.UserID = currentUser.UserID
} else {
u.Realname = m.Principal
u.Password = "******"
u.Comment = "registered from LDAP."
userID, err := dao.Register(u)
if err != nil {
return nil, err
}
u.UserID = int(userID)
}
return &u, nil
}