guichet/login.go

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/*
login handles login and current-user verification
*/
package main
import (
"fmt"
"net/http"
"strings"
"github.com/go-ldap/ldap/v3"
)
type LoginInfo struct {
Username string
DN string
Password string
}
type LoginStatus struct {
Info *LoginInfo
conn *ldap.Conn
UserEntry *ldap.Entry
CanAdmin bool
CanInvite bool
}
func (login *LoginStatus) WelcomeName() string {
ret := login.UserEntry.GetAttributeValue("givenName")
if ret == "" {
ret = login.UserEntry.GetAttributeValue("displayName")
}
if ret == "" {
ret = login.Info.Username
}
return ret
}
func checkLogin(w http.ResponseWriter, r *http.Request) *LoginStatus {
var login_info *LoginInfo
session, err := store.Get(r, SESSION_NAME)
if err == nil {
username, ok := session.Values["login_username"]
password, ok2 := session.Values["login_password"]
user_dn, ok3 := session.Values["login_dn"]
if ok && ok2 && ok3 {
login_info = &LoginInfo{
DN: user_dn.(string),
Username: username.(string),
Password: password.(string),
}
}
}
if login_info == nil {
login_info = handleLogin(w, r)
if login_info == nil {
return nil
}
}
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l, err := ldapOpen(w)
if l == nil {
return nil
}
err = l.Bind(login_info.DN, login_info.Password)
if err != nil {
delete(session.Values, "login_username")
delete(session.Values, "login_password")
delete(session.Values, "login_dn")
err = session.Save(r, w)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return nil
}
return checkLogin(w, r)
}
loginStatus := &LoginStatus{
Info: login_info,
conn: l,
}
requestKind := "(objectClass=organizationalPerson)"
if strings.EqualFold(login_info.DN, config.AdminAccount) {
requestKind = "(objectclass=*)"
}
searchRequest := ldap.NewSearchRequest(
login_info.DN,
ldap.ScopeBaseObject, ldap.NeverDerefAliases, 0, 0, false,
requestKind,
[]string{
"dn",
"displayname",
"givenname",
"sn",
"mail",
"cn",
"memberof",
"description",
"garage_s3_access_key",
},
nil)
// FIELD_NAME_DIRECTORY_VISIBILITY,
// FIELD_NAME_PROFILE_PICTURE,
sr, err := l.Search(searchRequest)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return nil
}
if len(sr.Entries) != 1 {
http.Error(w, fmt.Sprintf("Unable to find entry for %s", login_info.DN), http.StatusInternalServerError)
return nil
}
loginStatus.UserEntry = sr.Entries[0]
loginStatus.CanAdmin = strings.EqualFold(loginStatus.Info.DN, config.AdminAccount)
loginStatus.CanInvite = false
groups := []EntryName{}
searchRequest = ldap.NewSearchRequest(
config.GroupBaseDN,
ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
fmt.Sprintf("(&(objectClass=groupOfNames)(member=%s))", login_info.DN),
[]string{"dn", "displayName", "cn", "description"},
nil)
// // log.Printf(fmt.Sprintf("708: %v",searchRequest))
sr, err = l.Search(searchRequest)
// if err != nil {
// http.Error(w, err.Error(), http.StatusInternalServerError)
// return
// }
//// log.Printf(fmt.Sprintf("303: %v",sr.Entries))
for _, ent := range sr.Entries {
// log.Printf(fmt.Sprintf("305: %v",ent.DN))
groups = append(groups, EntryName{
DN: ent.DN,
Name: ent.GetAttributeValue("cn"),
})
// log.Printf(fmt.Sprintf("310: %v",config.GroupCanInvite))
if config.GroupCanInvite != "" && strings.EqualFold(ent.DN, config.GroupCanInvite) {
loginStatus.CanInvite = true
}
// log.Printf(fmt.Sprintf("314: %v",config.GroupCanAdmin))
if config.GroupCanAdmin != "" && strings.EqualFold(ent.DN, config.GroupCanAdmin) {
loginStatus.CanAdmin = true
}
}
// for _, attr := range loginStatus.UserEntry.Attributes {
// if strings.EqualFold(attr.Name, "memberof") {
// for _, group := range attr.Values {
// if config.GroupCanInvite != "" && strings.EqualFold(group, config.GroupCanInvite) {
// loginStatus.CanInvite = true
// }
// if config.GroupCanAdmin != "" && strings.EqualFold(group, config.GroupCanAdmin) {
// loginStatus.CanAdmin = true
// }
// }
// }
// }
return loginStatus
}
func handleLogout(w http.ResponseWriter, r *http.Request) {
session, err := store.Get(r, SESSION_NAME)
if err != nil {
session, _ = store.New(r, SESSION_NAME)
}
delete(session.Values, "login_username")
delete(session.Values, "login_password")
delete(session.Values, "login_dn")
err = session.Save(r, w)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
http.Redirect(w, r, "/", http.StatusFound)
}
type LoginFormData struct {
Username string
WrongUser bool
WrongPass bool
ErrorMessage string
}
func handleLogin(w http.ResponseWriter, r *http.Request) *LoginInfo {
templateLogin := getTemplate("login.html")
if r.Method == "GET" {
templateLogin.Execute(w, LoginFormData{})
return nil
} else if r.Method == "POST" {
r.ParseForm()
username := strings.Join(r.Form["username"], "")
password := strings.Join(r.Form["password"], "")
user_dn := fmt.Sprintf("%s=%s,%s", config.UserNameAttr, username, config.UserBaseDN)
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if strings.EqualFold(username, config.AdminAccount) {
user_dn = username
}
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loginInfo, err := doLogin(w, r, username, user_dn, password)
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if err != nil {
data := &LoginFormData{
Username: username,
}
if ldap.IsErrorWithCode(err, ldap.LDAPResultInvalidCredentials) {
data.WrongPass = true
} else if ldap.IsErrorWithCode(err, ldap.LDAPResultNoSuchObject) {
data.WrongUser = true
} else {
data.ErrorMessage = err.Error()
}
templateLogin.Execute(w, data)
}
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return loginInfo
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} else {
http.Error(w, "Unsupported method", http.StatusBadRequest)
return nil
}
}
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func doLogin(w http.ResponseWriter, r *http.Request, username string, user_dn string, password string) (*LoginInfo, error) {
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l, _ := ldapOpen(w)
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err := l.Bind(user_dn, password)
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if err != nil {
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return nil, err
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}
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// Successfully logged in, save it to session
session, err := store.Get(r, SESSION_NAME)
if err != nil {
session, _ = store.New(r, SESSION_NAME)
}
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session.Values["login_username"] = username
session.Values["login_password"] = password
session.Values["login_dn"] = user_dn
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err = session.Save(r, w)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
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return nil, err
}
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LoginInfo := LoginInfo{
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DN: user_dn,
Username: username,
Password: password,
}
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return &LoginInfo, nil
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}