Accessing LDAP For User / Password Authentication

May 17, 2012

I need to authenticate a user against LDAP/AD (windows 2008 r2) so I can leverage the domains password rules etc... I found code that will allow me to validate a users ID and Password entered into a form (using System.DirectoryServices.DirectoryEntry) but my problem is if the user enters an invalid password more that AD is configured to allow, the account gets locked out. Is there anyway around this?

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LDAP Username Password Authentication?

Aug 5, 2009

I have 2 questions here.

1. I would like to know how the attributes of an object in LDAP can be fetched using vb.net

eg here i want to get the properties of user with id saechira.[URL]..

2. I have to perform the authentication of username and password using our LDAP server. I have tried to use the below code. When I try to execute this code it say "Logon Failure: Unknown user name or bad password". Is it because of any invalid parameters, can anyone Please let me know why the authentication fails.. The username password and the domain are all correct. why does this error occur.

[Code]...

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Return User Details After Ldap Authentication (asp.net)?

May 15, 2012

I am trying to set up a new internal system for my client currently, they insisted on integrating the login with AD, which makes sense, and i have managed that with no problem. However what i also want to do, after authentication, is to store some user details / attributes as session variables. I have the following code to aithenticate the user:

'this function authenticates against AD - very simple and works nicely.
Function AuthenticateUser(path As String, user As String, pass As String) As Boolean
Dim de As New DirectoryEntry(path, user, pass, AuthenticationTypes.Secure)

[code]....

which works nicely, and once the function returns me a True, i set Session("LoggedIn") as True.what i need to do is (hopefully within the above function) save the user's name, and 2 other custom atributes from within the user's AD profile.How would i access those (hypothetically)

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Get User's Password With Windows Authentication?

Aug 3, 2011

get user's password with windows authentication

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If/then Based User And Password Authentication?

Apr 17, 2009

I am writing a program that accepts a user name and password (the password must show up as *s). The user gets three tries to enter the correct information before the program is closed. So far I have the password showing up as the password in clear text the first time and in *s the next two times. The authentication also fails even when I use the correct user name and password which are password and user for now.

Public Class frmPassword
Private Sub btnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click
Static intCounter As Integer = 0
intCounter = intCounter + 1

[code].....

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LDAP Authentication Using .Net?

Sep 12, 2006

I have a LDAP Server ("Test.dir.svc.mytest.com") and i want to check if an user with UID a PWD is certified. How to do it?

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VS 2008 LDAP Check Path Exists When Authentication Is None

May 15, 2009

LDAP check dir exists when authentication is none Experts I am try to check if an LDAP path exists and the following code works fine if the AuthenticationType is not none. How do you check this if the LDAP does not use authentication?

[Code]...

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LDAP Authentication - Cycle Through The Local Domain Controllers Listed On The Machine?

Jul 6, 2010

Our company is developing software projects that use a users windows username/password for program authentication. Our programs encrypt the username /password, send them to a web service. The web service decrypts the username/password and authenticates the user against our LDAP using the System.DirectoryServices namespace. This works well. There are two methods, one that validates the user and passes back the user's LDAP info in a datatable, the other passes back a boolean that indicates the user is on the domain. This is working just fine. Over the 4th of July weekend, our domain server hung. While it slowed down the login process for windows while it re-routed to a secondary domain server across the country, all our programs could not validate the users because our local domain controller was down.So I have been asked to update the web services to include a list of domain controllers that can be used if the local one is not available. Below is a snippet of code I use to validate a user:

[code]...

The getinfo function uses the directory services to create an LDAP entry, then do a search based on the account name (windows username) and populates properties for common LDAP information. How can I extend this function, or re-write it, to run down a list of domain controllers found on the network to validate a username? I was thinking of putting the domain in a database, but that requires administration as they change. Is there a way to cycle through the local domain controllers listed on the machine?

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Move From Custom Login Screen To Active Directory LDAP Authentication?

Mar 11, 2009

I have a WinForms app with SQL05 backend. It has a standard Login window where users are required to supply a username/password. This is validated using my own code and sprocs. Now one of my big clients has scared the bejezus out of me by saying, "Hey Chris, I want you to change your app in line with all our other IT systems so that users can use their common username and passwords with authentication against LDAP". :confused: Having had a moment to reflect, I have some questions (some very noob in nature!)

1. Is this requirement a big deal? :) Or straightforward to implement?

2. Does this mean that when user's double-click my app icon on the desktop, the authentication automagically happens without the need for a Login screen?

3. How on earth can I test this. My dev environment does not use AD, but I do have SBS2003

4. Can anyone point me to good resources about this on the web?

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Resetting A Users Password Through LDAP?

Mar 26, 2009

Long story short I have a situation where some users have access to two domains that do not trust each other. They log into one domain and their user ID's are identical on the other domain. So when they change their password on the first domain they need to call into tech support to have it reset on the second domain. I'm writing a app that checks if they have access to the first domain but not the second and if this is found to be true it prompts them for the new password to update the second domain.

Here is where I am stuck. The following code works GREAT but I need it to be more flexible:

Code:

Friend Function ResetPassword(ByVal OldPassword As String, ByVal NewPassword As String, ByVal UserName As String) As String
' Resets a users domain password

[Code]....

The issue is the CN is different between domains (one is first name last, other is last name first) so I need to search by UserID which is the same between the two. So I tried searching by sAMAccountName but it says object not found. Also I need to be able to search the entire Super Corp OU. When I get rid of the extra OU's the search also fails

So I need to search LDAP for sAMAccountName anywhere in OU=Super Corp. How can I do this? Every combination I try seems to fail yet if I hard code it like the above example it works great. The idea is to replace CN=John Q. Public with sAMAccountName=" & username & " to pull jsut that user on the fly.

If it matters all clients are XP SP2 or higher, both domains are Server 2003 or higher. VB 2008 SP1. The error message when a different search is done is a "Object not found".

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Connection To LDAP Fails Unknown Username Or Bad Password?

Mar 23, 2011

I would really welcome some help with this issue. We have a php code that works and connects to the LDAP. When I try to connect using VB.NET 2010, it fails to bind with logon failure unknown username or bad password. Below is the connection information. When I talk to the folks who run the ldap server, they say I am binding sucessfully, below is the log file for the sucessful bind? If I continue and try to execute a search I don't get any results. The server is running openLDAP ver 2.3.39 on a linux server, server requires connection on port 636 for secure connection, or 389 for anonymous.

[Code]...

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Forgot Active Directory Password - Reset Using LDAP

Apr 21, 2011

I'm working on a web based "Forgot Password" to reset AD passwords, using LDAP. Well, I can unlock the user, but not change the password.

Here is my function :
Private Function ChangeLocalUserPassword(ByVal User As String, ByVal Pass As String) As Boolean
Dim pinger As New Net.NetworkInformation.Ping
Dim usr As DirectoryEntry
_de = GetDirectoryEntry()
If _de Is Nothing Then
[Code] .....

How I can get around hard coding the Admin user on the page? Would creating an IUSR with a few Admin privileges work?

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Authentication - .NET - Accessing MySettings.Default Changes Thread.CurrentPrincipal?

Nov 14, 2011

It appears that when you access My.Settings.Default in VB.NET, your thread's CurrentPrincipal changes. Consider the following code.

[Code]...

Is this expected? Is it documented anywhere? I couldn't find any references to it.It also seems to only do this the first time My.MySettings.Default is accessed, which means that a workaround might be to touch the property to initialize it before attempting to set the thread's CurrentPrincipal. Would there be any undesirable side effects to doing that?

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Basic Authentication Without Password?

Feb 26, 2010

I am currently developing an application in VB.net that opens up a web document via Web Browser Control, parses the HTML, and sends back the data I need. This is not a problem.However, one of the sites requires basic authorization to access. I know the following code will workThe dialog box will come up with in the User Name box, but the window focus will be on the password box.

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Joomla Password Authentication In Visual Basic .NET?

Oct 19, 2011

I have managed to successfully connect remotely to the MySQL database for my Joomla! 1.5 website using MySqlConnector in Visual Basic .NET 2010. Now I am trying to authenticate a user's password from values submitted in a simple form to those retrieved from a MySQL query.

I found a useful thread on forums.joomla.org titled "Joomla password MD5 & VB.NET MD5", but the code snippets there produce the incorrect hash.Here is another useful Joomla Forums thread as to how passwords are encrypted (using MD5 hash and "salt") in the Joomla DB.

[Code]...

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Username / Password Authentication For Account Not Currently Logged In

Nov 14, 2011

I can access the current Windows user, but I want to give an admin the ability to enter an alternate username and password for a different Windows Active Directory Account without having to logoff and log back in. Once the account is authenticated, I need to use it in a connection string to sql server. I know I could do this for a SQL Server login, but this is Windows Authentication only. It was installed with ClickOnce. Is there an .exe file on the user's machine?

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Authentication - VB Tutorial For Username / Password Check Using Database

Jul 30, 2011

Where is a good VB.NET tutorial where I can have a username box and a password box and it checks in the database if it's there and if it is then another form will show?

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DB/Reporting :: Authentication - Login Using Your VBulletin Username And Password

Aug 6, 2009

I'm trying to make an authentication before my visual basic 2008 project, a login window. You have to login using your vBulletin username & password. The username and password from my community, which is a vBulletin forum. So, I'd like a form that ask you to login using your username and password from my vBulletin forum, so you'd have to register before...

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.net - Verify User Log In Using LDAP?

Nov 17, 2011

I have not been able to successfully verify a user with LDAP for an ASP.NET web application. I have done so on our own network against Active Directory, but this is against a server outside of our network that is OID (Oracle Internet Directory).Usually, I use the following code with no problem.

Dim myDirectoryEntry As New System.DirectoryServices.DirectoryEntry("LDAP://1.2.3.4:999/OU=SomeOU,DC=Something,DC=com")
myDirectoryEntry.AuthenticationType = System.DirectoryServices.AuthenticationTypes.Sealing
myDirectoryEntry.AuthenticationType = System.DirectoryServices.AuthenticationTypes.Secure
Try

[Code]...

After that, I haven't been able to find a method to verify a user's log in information with their password and then pull back some information.

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Get Logged In User's Alias From LDAP

May 17, 2010

I'm trying to get the Alias of the logged in user (Active Directory/LDAP environment/Exchange) .

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Access Current User Information Via LDAP?

May 24, 2012

How can I access the current user information via LDAP and VB.Net 2.0*? I found a vbscript that works, but I'd rather have it done in .net

Dim objSysInfo = CreateObject("ADSystemInfo")
Dim strUser = objSysInfo.UserName 'returns current user account
Dim objUser = GetObject("LDAP://" & strUser) 'queries active directory for user account

I'm using the framework 2.0 because it is for more likely in my XP/Vista/7 World to have 2.0 installed than 3.5 or 4.0

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Populate A Combobox With User Names From LDAP?

Sep 2, 2008

I have been trying for days to populate a combobox with user names from our LDAP. I can not seem to get this to work however I am really new to LDAP also. Here is my code...

[Code]...

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Ldap - Display Groups User Is Member Of In A ListBox?

Oct 11, 2011

I received this function to get groups a user is member of.

Private Function GetRoles(ByVal user As String) As String()
Dim propertyCount As Integer
'Initialisation du tableau avec 10 String ""

[code]....

, it displays only one line with a String[] Array value.

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Pulling User Name And Info From Active Directory Using LDAP?

Apr 28, 2006

1> take a request... ie. First name, Last name, or login ID and Search AD Path can be hard coded so entire forest is not searched.

2> List all entries found

3>once the correct user is selected I need to pull First, last, middle name and , Email , Phone number , @ and GUID for that user.

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VS 2010 Adding A User To MULTIPLE LDAP Groups At Once?

Mar 30, 2012

Ok, I have this code... and it works. If I want to add it to say... a checkbox or something of the sort.

Public Sub groupaddarray()
Try
'Alpharetta Staff
If Form1.CheckBox23.Checked = True Then
Dim grp As IADsGroup

[Code]...

My question... how can I double click the listbox, and then it keeps adding these groups to say... another text box, and when I click add groups it will read the textbox, and add multiple groups instead of just the one?

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Asp.net - LDAP User Attribute Request Returns Unusual Results?

May 31, 2012

I'm struggling to return user details from AD using LDAP, after i have authenticated that the user exists. I am using a simple auth method as follows:

Function AuthenticateUser(path As String, user As String, pass As String) As Boolean
Dim de As New DirectoryEntry(path, user, pass, AuthenticationTypes.Secure)
Try
Dim ds As DirectorySearcher = New DirectorySearcher(de)
Dim result As SearchResult = ds.FindOne()

[Code]...

the problem is that "distinguishedName" returns "DC=our-domain,DC=co,DC=uk" and "name" returns just "our-domain", not the name of the user that has just been auth'ed

Note: the displayName.text outputs are purely for debug purposes.I have tried various combos of requests but nothing seems to return USER details. ETA: to the security police: this is all within a https connection, I'm not sending passwords about in plain text!

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[2005] Active Directory With LDAP Retrieving User Object Properties?

May 4, 2006

I'm trying to obtain the Terminal Services Profile Path for a user using VB.Net and the System.DirectoryServices.DirectorySearcher. I am able to get the user object's first name, last name, city, state, zip, etc. However, there is one property that eludes me. I cannot manage to find a way to get the terminalservicesprofilepath property.This is how I did it in VB6 and it worked perfect:

visual basic code:
Dim TSPath as string
Dim FirstName as string

[code].....

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Accessing A Website With A Username And Password?

Sep 30, 2010

I want to read some data from a website using a user and pass. Actually the website is accessible without user and pass but I want some data which is only accessible with my user & pass (consider yahoo.com which is accessible even if you're not signed in). I don't know whether vb can do this or not.

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Create A Simple Password Box That Will Ask The User For A Username And Password?

Jul 15, 2009

I am looking to create a simple password box that will ask the user for a username and pass, if the user is validated against the usernames and passwords in an .ini file the login box will close and launch a program also stated in the .ini file. I would also like to be able to launch different programs for different users.

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Show Instead Of The Password It-self When The User Enters The Password?

Apr 10, 2010

I have a button on my Form called EditingButton that will have a DialogBox appear asking for a password. How can I have "*" show instead of the Password it-self when the user enters the password?[URL]...

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