// 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 against LDAP based on basedn template and LDAP URL,
// if the check is successful a dummy record will be inserted 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) {
p := m.Principal
for _, c := range metaChars {
if strings.ContainsRune(p, c) {
return nil, fmt.Errorf("the principal contains meta char: %q", c)
}
}
ldapURL := config.LDAP().URL
if ldapURL == "" {
return nil, errors.New("can not get any available LDAP_URL")
}
log.Debug("ldapURL:", ldapURL)
ldap, err := openldap.Initialize(ldapURL)
if err != nil {
return nil, err
}
ldap.SetOption(openldap.LDAP_OPT_PROTOCOL_VERSION, openldap.LDAP_VERSION3)
ldapBaseDn := config.LDAP().BaseDn
if ldapBaseDn == "" {
return nil, errors.New("can not get any available LDAP_BASE_DN")
}
log.Debug("baseDn:", ldapBaseDn)
ldapSearchDn := config.LDAP().SearchDn
if ldapSearchDn != "" {
log.Debug("Search DN: ", ldapSearchDn)
ldapSearchPwd := config.LDAP().SearchPwd
err = ldap.Bind(ldapSearchDn, ldapSearchPwd)
if err != nil {
log.Debug("Bind search dn error", err)
return nil, err
}
}
attrName := config.LDAP().UID
filter := config.LDAP().Filter
if filter != "" {
filter = "(&" + filter + "(" + attrName + "=" + m.Principal + "))"
} else {
filter = "(" + attrName + "=" + m.Principal + ")"
}
log.Debug("one or more filter", filter)
ldapScope := config.LDAP().Scope
var scope int
if ldapScope == "1" {
scope = openldap.LDAP_SCOPE_BASE
} else if ldapScope == "2" {
scope = openldap.LDAP_SCOPE_ONELEVEL
} else {
scope = openldap.LDAP_SCOPE_SUBTREE
}
attributes := []string{"uid", "cn", "mail", "email"}
result, err := ldap.SearchAll(ldapBaseDn, scope, filter, attributes)
if err != nil {
return nil, err
}
if len(result.Entries()) == 0 {
log.Warningf("Not found an entry.")
return nil, nil
} else if len(result.Entries()) != 1 {
log.Warningf("Found more than one entry.")
return nil, nil
}
en := result.Entries()[0]
bindDN := en.Dn()
log.Debug("found entry:", en)
err = ldap.Bind(bindDN, m.Password)
if err != nil {
log.Debug("Bind user error", err)
return nil, err
}
defer ldap.Close()
u := models.User{}
for _, attr := range en.Attributes() {
val := attr.Values()[0]
switch attr.Name() {
case "uid":
u.Realname = val
case "cn":
u.Realname = val
case "mail":
u.Email = val
case "email":
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."
if u.Email == "" {
u.Email = u.Username + "@placeholder.com"
}
userID, err := dao.Register(u)
if err != nil {
return nil, err
}
u.UserID = int(userID)
}
return &u, nil
}