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// Copyright github.com/juju2013. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// package ldap provide functions & structure to query a LDAP ldap directory
// For now, it's mainly tested again an MS Active Directory service, see README.md for more information
package ldap
import (
"fmt"
"github.com/gogits/gogs/modules/log"
goldap "github.com/juju2013/goldap"
)
// Basic LDAP authentication service
type Ldapsource struct {
Name string // canonical name (ie. corporate.ad)
Host string // LDAP host
Port int // port number
BaseDN string // Base DN
Attributes string // Attribut to search
Filter string // Query filter to validate entry
MsAdSAFormat string // in the case of MS AD Simple Authen, the format to use (see: http://msdn.microsoft.com/en-us/library/cc223499.aspx)
Enabled bool // if this source is disabled
}
//Global LDAP directory pool
var (
Authensource []Ldapsource
)
// Add a new source (LDAP directory) to the global pool
func AddSource(name string, host string, port int, basedn string, attributes string, filter string, msadsaformat string) {
ldaphost := Ldapsource{name, host, port, basedn, attributes, filter, msadsaformat, true}
Authensource = append(Authensource, ldaphost)
}
//LoginUser : try to login an user to LDAP sources, return requested (attribut,true) if ok, ("",false) other wise
//First match wins
//Returns first attribute if exists
func LoginUser(name, passwd string) (a string, r bool) {
r = false
for _, ls := range Authensource {
a, r = ls.SearchEntry(name, passwd)
if r {
return
}
}
return
}
// searchEntry : search an LDAP source if an entry (name, passwd) is valide and in the specific filter
func (ls Ldapsource) SearchEntry(name, passwd string) (string, bool) {
l, err := goldap.Dial("tcp", fmt.Sprintf("%s:%d", ls.Host, ls.Port))
if err != nil {
log.Debug("LDAP Connect error, disabled source %s", ls.Host)
ls.Enabled = false
return "", false
}
defer l.Close()
nx := fmt.Sprintf(ls.MsAdSAFormat, name)
err = l.Bind(nx, passwd)
if err != nil {
log.Debug("LDAP Authan failed for %s, reason: %s", nx, err.Error())
return "", false
}
search := goldap.NewSearchRequest(
ls.BaseDN,
goldap.ScopeWholeSubtree, goldap.NeverDerefAliases, 0, 0, false,
fmt.Sprintf(ls.Filter, name),
[]string{ls.Attributes},
nil)
sr, err := l.Search(search)
if err != nil {
log.Debug("LDAP Authen OK but not in filter %s", name)
return "", false
}
log.Debug("LDAP Authen OK: %s", name)
if len(sr.Entries) > 0 {
r := sr.Entries[0].GetAttributeValue(ls.Attributes)
return r, true
}
return "", true
}
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