LDAP Dokumentace

Pouziti HKFree LDAPu pro autentizaci je vcelku jednoduche.

• Uzivatele maji login ve formatu XXX, kde XXX je jejich uid
• Heslo je heslo v userdb
• Synchronizace probiha jednou za den z userdb (vse mimo hesla)
• base je dc=hkfree,dc=org

BASH

Je treba nainstalovat (aspon v debianu) ldap-utils. Dalsi potrebna vec je pridat do /etc/ldap/ldap.conf toto:

BASE    dc=hkfree,dc=org
URI     ldap://ldap.hkfree.org

TLS_CACERT      /etc/ssl/certs/hkfree.crt
TLS_REQCERT     try

Nyni si stahnete z https://igw.hkfree.org/download/CA/hkfree.crt do adresare /etc/ssl/certs/ a doinstalujte (v pripade potreby) balik openssl a libsasl2-modules

Jednoduchy test, jestli vse chodi je napriklad:

ldapsearch -U MOJE_ID -ZZ -h ldap.hkfree.org

update 28.10.2009:

ldapwhoami -U13 -w $heslo -ZZ
SASL/DIGEST-MD5 authentication started
SASL username: 13
SASL SSF: 128
SASL data security layer installed.
dn:uid=13,ou=people,dc=hkfree,dc=org

ldapwhoami -x -D"uid=13,ou=People,dc=hkfree,dc=org" -w $heslo -ZZ
dn:uid=13,ou=People,dc=hkfree,dc=org

Zmena hesla se da provest pomoci:

ldappasswd -U MOJE_ID -ZZ -h ldap.hkfree.org -S

Zjisteni roli uzivatele 13 (loguju se k LDAPu jako uzivatel 1980):

ldapsearch -x -D"uid=1980,ou=People,dc=hkfree,dc=org" -w $heslo -ZZ "uid=13" memberOf

atd.

Konfigurak pro Apache

• je treba povolit mod_authnz_ldap a ldap (v apache2.x)
• je treba mit spravne nastavene SSL (importovany korenovy certifikat hkfree) a ldap.conf

• pro nejaky Directory/Location lze autentizace pouzivat takto:

               AuthType basic
               AuthBasicProvider ldap
               AuthLDAPURL "ldap://ldap.hkfree.org/ou=People,dc=hkfree,dc=org"
               AuthName "VPN"
               AuthLDAPRemoteUserIsDN off
               require valid-user
               AuthzLDAPAuthoritative off

• pokud chci povolit napriklad pristup jen pro SO/ZSO, tak pouziju URL

               AuthLDAPURL "ldap://ldap.hkfree.org/ou=People,dc=hkfree,dc=org?uid?sub?(|(memberOf=cn=ZSO,ou=roles,dc=hkfree,dc=org)(memberOf=cn=SO,ou=roles,dc=hkfree,dc=org))"

• dalsi moznost, ktera je ovsem o neco pomalejsi je hledat ve skupinach primo a neumoznuje hledat ve vice skupinach najednou je

               AuthLDAPGroupAttribute member
               AuthLDAPGroupAttributeIsDN on
               Require ldap-group cn=SO,ou=roles,dc=hkfree,dc=org

PERL

viz http://ldap.perl.org

use Net::LDAP; 
use Authen::SASL;

my $ldapserver = "ldap://ldap.hkfree.org";
my $password = "heslo";
my $user = "uzivatel";
my $dn = "dc=hkfree,dc=org";

my $ldap = Net::LDAP->new($ldapserver, onerror => 'die' );

$ldap->start_tls(
        $verify => 'require'
        );

my $sasl = Authen::SASL->new(
  mechanism => 'CRAM-MD5 PLAIN ANONYMOUS',
  callback => {
    pass => $password,
    user => $user,
  }
);

my $mesg = $ldap->bind( $dn, sasl => $sasl, version => 3 );

Java

import java.util.*;
import java.util.logging.*;
import javax.naming.*;
import javax.naming.directory.*;
import javax.naming.ldap.*;

public class Main {

    public static boolean authenticate(int uid, String password) {
        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://ldap.hkfree.org");
        try {
            LdapContext ctx = new InitialLdapContext(env, null);
            StartTlsResponse tls = (StartTlsResponse) ctx.extendedOperation(new StartTlsRequest());
            tls.negotiate();
            ctx.addToEnvironment(Context.SECURITY_AUTHENTICATION, "simple");
            ctx.addToEnvironment(Context.SECURITY_PRINCIPAL, "uid=" + uid + ",ou=People,dc=hkfree,dc=org");
            ctx.addToEnvironment(Context.SECURITY_CREDENTIALS, password);
            Attributes dummyOperationData = ctx.getAttributes("uid=" + uid + ",ou=People,dc=hkfree,dc=org");
            //System.out.println(dummyOperationData);
            tls.close();
            ctx.close();
            return true;
        } catch (Exception ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
            return false;
        }
    }

    public static void main(String[] args) {
        int uid = 1980;
        String password = "xxx";
        boolean ok = authenticate(uid, password);
        System.out.println(ok);
    }
}

PHP

viz http://www.php.net

Zjisteni roli, do kterych uzivatel patri (napr. USER, SO, VV, SO-12, SO-48)

$ldapserver = "ldap://ldap.hkfree.org";
$dn = "ou=People,dc=hkfree,dc=org" ;
$ldapUser ="uid=$uid,$dn" ;
$filter = "uid=$uid";
$ldapCon = ldap_connect($ldapserver) or die ("Nefunguje spojeni s ldap serverem. Prosím zkuste později");
$ldapbind = ldap_bind($ldapCon, $ldapUser, $password) or header("Location: logout.php");
$rec = ldap_search($ldapCon, $dn, $filter, array("memberOf")) or die ("Error ldap search");

Dokumentace

http://linuxwiki.riverworth.com/index.php?title=LDAP_Authentication