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