I have integrated PHP LDAP server on my server by following this guide. (Complete LDAP reference is here.)
I have displayed the users list which are available on LDAP server. Our application gets connected to many LDAP servers like one-many relationship, each user has LDAP server.
Now, I want my application to get a notification whenever there is a insert/update/delete (CRUD) operation performed on each user's LDAP server. I need Notifications for how many new records have been inserted/updated/deleted to LDAP server.
I have googled it but did not find any solution. I have a doubt, is this really possible to get notifications about any updates happened to LDAP server? If yes, can anyone please explain how to achieve this?
My code to LDAP connection & display users:
$domain = 'unixmen.local';
$username = 'cn=admin,dc=unixmen,dc=local';
$password = '****';
define('HOSTNAME','ldap://127.0.0.1');
$ldap_conn = ldap_connect(HOSTNAME,389) or die("Could not connect to ldap server");
ldap_set_option($ldap_conn, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ldap_conn, LDAP_OPT_REFERRALS, 0);
$dn="ou=sales,dc=unixmen,dc=local";
$filter='(&(objectClass=inetOrgPerson)(uid=*))';
$result=ldap_search($ldap_conn, $dn, $filter, array("cn", "dn", "givenName", "uidNumber", "sn"));
for ($i=0; $i<$info["count"]; $i++)
{
$users[$i]["full_name"] = $info[$i]["cn"][0];
$users[$i]["first_name"] = $info[$i]["givenname"][0];
$users[$i]["last_name"] = $info[$i]["sn"][0];
$users[$i]["uid_number"] = $info[$i]["uidnumber"][0];
}
print_r($users);
There is an LDAP extension, that allows a server to notify a client application when entries are created, updated or deleted: LDAP Persistent Search control (https://datatracker.ietf.org/doc/html/draft-ietf-ldapext-psearch-03).
As the extension is not an approved standard, not all servers support it, and thus I don't think there is support for it in PHP.
Related
I need to create a SpringBoot service and provide an authentication service using LDAP.
I followed this example and it works fine for me using an embedded local ldap server (as suggested into the tutorial)
Now I tried to use the official company LDAP server but I got this error:
Uncategorized exception occured during LDAP processing; nested exception is javax.naming.NamingException: [LDAP: error code 1 - 000004DC: LdapErr: DSID-0C090A5C, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v4563];
This error seems related to a LDAP bind request that it's necessary. But how can I add this into the Spring Security LDAP?
This is the code where I tried to integrate the company LDAP connection:
#Override
public void configure(AuthenticationManagerBuilder auth) throws Exception {
auth
.ldapAuthentication()
.userDnPatterns("userPrincipalName={0},ou=users")
.groupSearchBase("ou=users")
.contextSource()
.url("ldap://companyhost:389/dc=aa,dc=company,dc=com")
.and()
.passwordCompare()
.passwordEncoder(new BCryptPasswordEncoder())
.passwordAttribute("userPassword");
}
I tried also with my PHP example (using the official company active directory and this works fine)
// connect to ldap server
$ad = ldap_connect("ldap://".LDAP_HOST, LDAP_PORT)
or die("Could not connect to LDAP server.");
ldap_set_option($ad, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ad, LDAP_OPT_REFERRALS, 0);
$user = $_POST['username'];
$password = $_POST['password'];
if (ldap_bind($ad, "$user"."#".LDAP_HOST, $password)) {
// User authenticated
}
The Directory Server you are connecting to does not allow 'anonymous' access, i.e. your application first has to authenticate beforehand (via and LDAP BIND operation) before performing queries. LdapContextSource
Furthermore Using password comparision ('passwordCompare()') is not LDAP best practice (I don't know why this is still in the Spring docs), itstead an LDAP BIND operation should be used to authenticate users. This lets the server compare the password as only the server knows which password storage scheme was used on the server side when the password was saved.
Using 'userDnPattern' is also not LDAP best practices as this means you have to know the Directory Information Tree (DIT) of the LDAP Directory Server. Instead let the Directory Server determine the Distinguished Name (DN) by performa search leveraging 'userSearchBase', 'userSearchFilter' LdapAuthenticationProviderConfigurer
I have a website in PHP and want to authentificate users against Azure Active Directory. With ldap_connect and bind I have no problems to do this to a local AD-Server in our company.
function checkADAccount($username, $password)
{
$adServer = "myADServer";
$ldaprdn = 'myDomain' . "\\" . $username;
$ldap = ldap_connect($adServer);
ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
$bind = #ldap_bind($ldap, $ldaprdn, $password);
if ($bind) {
#ldap_close($ldap); // Verbindung schließen
return true;
} else {
return false;
}
}
But my application is hosted at Amazon Web Services (AWS) and is not in the same domain, so I can't use this way.
With ldap_connect and bind this functions to a local AD-Server in our company. But my application is hosted at Amazon Web Services (AWS) and is not in the same domain, so I can't use this way.
I tested graphapi with the ClientId and key for my company from Azure. So I can read the users-data, but I don't see any possibility to check a user/password combination. I only want to check, if there exists a user with this password, I don't need to read it from there.
So I tried to modify the LDAP-solution from above by changing the parameter of the adServer and of the user
$ldaprdn = 'sAMAccountname=' . $username . ',cn=users' . ',dc=myDomain,dc=com';
But I allwaws get: "Warning: ldap_bind(): Unable to bind to server: Can't contact LDAP server ". I tried for this multiple versions for the adServer but any delievers a binding.
Do you have any idea where is the error. I suggest with ldap_connect is the wron way, espacially I don't know which server-adress is the right one and how I had to tell the ClientId and key.
Currently, Azure AD doesn't support LDAP connection. It provides OAuth2 authentication and authorization. You can refer to Authentication Scenarios for Azure AD for detailed Azure AD scenarios.
For your requirement to authenticate users in your domain, you can leverage this code sample to implement authentication via Azure AD.
Otherwise, you can follow Authorization Code Grant Flow build your custom code to authenticate your users.
Any further concern, please feel free to let me know.
I've got here an Windows Server 2008r2 set up with Active Directory, DNS, DHCP and DC for testing purposes and i am quite new to LDAP.
I want to change the password for myself, even though if i am no
admin.
So, here is my script i am working on right now:
// LDAP Variables
$serverip = "192.168.2.1";
$serverport = 636;
$username = "user";
$userpassword = "password1";
$newpass = "password2";
$userDn = "CN=$username,CN=Users,DC=dc-name";
$ldapconn = ldap_connect($serverip, $serverport) or die("LDAP Connection Failed!\n");
ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0);
ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
if ($ldapconn) {
echo "Connection succeded\n";
// LDAP Bind
$bindresult = ldap_bind($ldapconn, $username, $userpassword);
if ($bindresult) {
echo "Bind: Succeded\n";
$userData['unicodePwd'] = toPwEntry($newpass);
$modresult = ldap_mod_replace($ldapconn, $userDn , $userData);
if (!$modresult) echo "PW Change Failed - Error No. ". ldap_errno($ldapconn).": " .ldap_error($ldapconn) . "\n";
}
else echo "Bind Failed - Error No. ". ldap_errno($ldapconn).": " .ldap_error($ldapconn) . "\n";
}
else echo "Connection failed - Error No. ". ldap_errno($ldapconn).": " .ldap_error($ldapconn) . "\n";
function toPwEntry($pw) {
return("\"". iconv('UTF-8','UTF-16LE',$pw) ."\"");
}
ldap_close($ldapconn);
when i start the script i get this error:
soenke#work:~/Desktop/$ php ldap.php
Connection succeded
Bind Failed - Error No. -1: Can't contact LDAP server
i also tried connections by using "ldaps://" in front of the ip but it doesn't work.
i would appreciate any help!
A couple of suggestions:
ldap_bind() wants $userDN rather than $username. That would cause a different error message though.
There's no actual network traffic between your web server and the ldap server until you call ldap_bind(), so make sure there aren't any firewall/network issues, etc. The error message says "Can't contact the server"; that might be exactly what's happening. (The ldap_connect() function just initializes a local struct in later versions of ldap libraries. You could think of it more like "ldap_init()" -- the "Connection succeeded" message doesn't imply a successful network connection here.)
You can setup an LDAP server to handle both secure and insecure connections on 389 instead of 636. Make sure you're connecting where the server expects you to.
These symptoms might also show up if your end of the TLS connection fails to verify the server certificate. You either have to provide root certificates to trust, or configure your client to not verify the cert (if the server has a self-signed certificate, for example). Either of those can be accomplished by setting variables in an ldap.conf file. Where to put ldap.conf depends on your web server setup.
This: http://www.novell.com/coolsolutions/tip/5838.html and this: http://www.whatsnoodle.com/php-ldap_bind-gives-the-error-cant-contact-ldap-server/ might have more details for you.
Active Directory will only let you change passwords via LDAPS and I'm pretty sure you have to use port 636.
When you specify LDAPS:// try it in upper case. At least one of the MS provider monikers is case-sensitive. I'm not completely sure it's the LDAP one; I've used caps for all monikers for years.
Your password, I think, has to be an octet string (byte array). I can't read PHP so I can't tell if that's what you're doing but I'm guessing so.
Your domain controller will need a certificate to do LDAPS. I'm no certificate expert but I think the name you use for the server has to match the one on the certificate and it's not normally the IP address (though I think you can put them in alternate names on the cert) so I think you should be using the server name.
I am tried to implement a LDAP authentication in my web application developed in ZF2. LDAP authentication is working fine in Windows 7.
But, after moving the application to LINUX machine, LDAP authentication is not working. I am always getting the error as : Warning: ldap_bind(): Unable to bind to server: Can't contact LDAP server in LdapConnect.php on line 20
I have used the scripts as:
$ldaphost = "ldap://xxxx.net";
$ldapport = 389;
$ds = ldap_connect($ldaphost, $ldapport) or die("Could not connect to $ldaphost");
if ($ds)
{
$username = "username#xxxx.net";
$upasswd = "password";
$ldapbind = ldap_bind($ds, $username, $upasswd);
if ($ldapbind)
{
print "Congratulations! you are authenticated successfully.";
}else{
print "Better luck next time!";
}
}
Should I install any software package or should I do any config settings?
Note: If I give the IP adress then it is working fine, but if I give the domain name, then it is not working.
The library may be different between the 2, or a different version. You'd be amazed how many variations of the ldap client there are. In your position I would (if available) use ldap client to make the same kind of connection a few different ways.
e.g. the "-x" on the standard ldapsearch:
-x Use simple authentication instead of SASL.
So you could express the connection like this:
ldapsearch -h xxxx.net -p 389 (etc)
ldapsearch -x -h ldap://xxxx.net:389 (this should actually be -H..)
and so on.
It is also possible for things outside of your code to be an issue. Prod servers often have firewalls and proxies (e.g. F5) that are transparent to the server/client.
Make sure your final code has exception handling for binding and searching. I'm not too familiar with the php implementation, and the doco is a tad thin. Normally you'd use a synchronous bind.
Can you verify that the code above is exactly as you had it on Windows? The reason I ask is that looking here: http://php.net/manual/en/function.ldap-connect.php it seems that you may be mixing 2 types of bind. I definitely wouldn't have done it like that in standard python.
So if using a URI normally you'd do it like this:
ldap_connect("ldap://blah:389")
and if you're connecting via host/port combo:
ldap_connect("blah","389")
With minimal exception info my best guess is that its actually trying to bind to a hostname "ldap://xxxx.net" on port "389".
I have an external web server trying to authenticate against Active Directory on an internal server via LDAP. I am able to connect and authenticate locally, though using the same code (switching out host and port) am not able to authenticate externally. We have other services that are able to connect and authenticate such as Attask (http://www.attask.com/).
The external server is currently a Linux (gs) on Media Temple running PHP 5.3.15 with LDAP support enabled.
The internal server is currently a Windows Server 2008 box with LDAP and Active Directory.
The code below is the current PHP I am using that was able to connect locally, but having problems on the external server. It basically uses the PHP LDAP connection string and tries to bind. If it fails, it tries to bind anonymously. Both of which aren't working externally and returns the error: Can't contact LDAP server.
<?php
$username = 'username';
$password = 'password';
$ldapconfig['host'] = '00.000.000.000';
$ldapconfig['port'] = '636';
$ldapconfig['basedn'] = 'dc=client,dc=eqc,dc=local';
$ds=ldap_connect($ldapconfig['host'], $ldapconfig['port']);
ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ds, LDAP_OPT_REFERRALS, 0);
ldap_set_option($ds, LDAP_OPT_NETWORK_TIMEOUT, 10);
$dn="".$username."";
if ($bind=ldap_bind($ds, $dn, $password)) {
echo("Login correct");
} else {
echo("Unable to bind to server.</br>");
echo("msg:'".ldap_error($ds)."'</br>".ldap_errno($ds)."");
if ($bind=ldap_bind($ds)) {
$filter = "(cn=*)";
if (!($search=#ldap_search($ds, $ldapconfig['basedn'], $filter))) {
echo("Unable to search ldap server<br>");
echo("msg:'".ldap_error($ds)."'</br>");
} else {
$number_returned = ldap_count_entries($ds,$search);
$info = ldap_get_entries($ds, $search);
echo "The number of entries returned is ". $number_returned."<p>";
for ($i=0; $i<$info["count"]; $i++) {
var_dump($info[$i]);
}
}
} else {
echo("Unable to bind anonymously<br>");
echo("msg:".ldap_error($ds)."<br>");
}
}
?>
A few notes:
The external LDAP server is using LDAPS so the suggested host is ldaps://00.000.000.000 on port 636
I've tried binding with 'username' as well as 'username#00.000.000.000' already
There is a firewall, however, the external server can successfully ping the internal LDAP server so there is connection taking place on that level.
Any help would be greatly appreciated. If there are server settings or things of that nature, would love to know. Also, I've checked out ADFS though could not find a simple script to setup to test without spending a lot time to no end if it didn't work.
When connecting to AD using LDAPS from a Linux box, I've always had to add the line
TLS_REQCERT never
in /etc/ldap.conf or equivalent (might require an apache restart - not sure). You can also try the format "ldaps://server.domain.tld:636" for the host, though I don't think that's the issue.
I found some decent documentation at http://en.gentoo-wiki.com/wiki/Active_Directory_Authentication_using_LDAP, though it appears to be down at the moment. Google's cached version: http://webcache.googleusercontent.com/search?q=cache:http://en.gentoo-wiki.com/wiki/Active_Directory_Authentication_using_LDAP
Have you checked if it is an SSL certificate error? Are you using a self signed cert or an official one?
"If you're using SSL (e.g. ldaps) and ldap_bind is throwing 'Unable to bind to server:' errors, check that the hostname used in the ldap_connect matches the 'CN' in the SSL certificate on the LDAP server" Source