gitea/modules/auth/ldap/ldap.go

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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"
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"github.com/gogits/gogs/modules/ldap"
"github.com/gogits/gogs/modules/log"
)
// Basic LDAP authentication service
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type Ldapsource struct {
Name string // canonical name (ie. corporate.ad)
Host string // LDAP host
Port int // port number
UseSSL bool // Use SSL
BaseDN string // Base DN
AttributeUsername string // Username attribute
AttributeName string // First name attribute
AttributeSurname string // Surname attribute
AttributeMail string // E-mail attribute
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 (
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Authensource []Ldapsource
)
// Add a new source (LDAP directory) to the global pool
func AddSource(name string, host string, port int, usessl bool, basedn string, attribcn string, attribname string, attribsn string, attribmail string, filter string, msadsaformat string) {
ldaphost := Ldapsource{name, host, port, usessl, basedn, attribcn, attribname, attribsn, attribmail, filter, msadsaformat, true}
Authensource = append(Authensource, ldaphost)
}
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//LoginUser : try to login an user to LDAP sources, return requested (attribute,true) if ok, ("",false) other wise
//First match wins
//Returns first attribute if exists
func LoginUser(name, passwd string) (cn, fn, sn, mail string, r bool) {
r = false
for _, ls := range Authensource {
cn, fn, sn, mail, 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, string, string, string, bool) {
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l, err := ldapDial(ls)
if err != nil {
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log.Error(4, "LDAP Connect error, %s:%v", ls.Host, err)
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
}
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search := ldap.NewSearchRequest(
ls.BaseDN,
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ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
fmt.Sprintf(ls.Filter, name),
[]string{ls.AttributeUsername, ls.AttributeName, ls.AttributeSurname, ls.AttributeMail},
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 {
cn := sr.Entries[0].GetAttributeValue(ls.AttributeUsername)
name := sr.Entries[0].GetAttributeValue(ls.AttributeName)
sn := sr.Entries[0].GetAttributeValue(ls.AttributeSurname)
mail := sr.Entries[0].GetAttributeValue(ls.AttributeMail)
return cn, name, sn, mail, true
}
return "", "", "", "", true
}
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func ldapDial(ls Ldapsource) (*ldap.Conn, error) {
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if ls.UseSSL {
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return ldap.DialTLS("tcp", fmt.Sprintf("%s:%d", ls.Host, ls.Port), nil)
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} else {
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return ldap.Dial("tcp", fmt.Sprintf("%s:%d", ls.Host, ls.Port))
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}
}