I am trying to make a Windows custom credential provider using this reference https://learn.microsoft.com/en-us/samples/microsoft/windows-classic-samples/credential-provider/
https://www.microsoft.com/en-us/download/details.aspx?id=53556#:~:text=Credential%20providers%20are%20used%20in,for%20Windows%20Vista%20and%20higher
The idea is:
I kept the username and password inside the pc
I use my own MFA (just simple push notification to my android phone)
If I confirm the notification, I will use the stored username & password to login
It works well whenever I match the password and Username, and login using my "Credential Provider"
Then I realize, after I login to my Microsoft username, The next login will be prompted PIN instead of password like this:
I know I can keep my Microsoft account's Password to my offline database and my idea is still working.
However, since my password is too long, I want to keep the pin instead of the password
Does Windows credential provider support PIN authentication?
I tried to google it, and it just showing the smartcard's pin instead of the Windows Logon Pin
------------------- UPDATE ------------
Looks like I did not write the question clearly
I want to extend my current Credential Provider that able to automatically sign in using password and Windows Hello PIN.
So the Database will consist of username and PIN (that match with Windows Hello PIN) or Password (that match with Local account password)
Is it possible?
Have a look how you set-up new logon using Picture or PIN credential providers from Microsoft Hello - initially you enter your password.
So these providers store this collected data in some internals and later provide them as collected by themself.
Nobody restrict you from doing the same way.
------------------- UPDATE ------------
Have a look at SampleWrapExistingCredentialProvider
Related
I am working on the windows credential provider
We start our project based on this https://github.com/DavidWeiss2/windows-Credential-Provider-library
We want to make this authentication passwordless. Therefore we have a "database" in forms of external file that keep the password, username and domain pairs. Due to security reason we hashed it. (eg: C:\Temp\MyCredsDatabase.dat)
If the user change the password from window's Built-in GUI System -> Account -> Sign-in Option -> Change Password, the next login will be failed simply because the user already update their password but our database still using the old password
Well, if I decrypt the password directly from the Microsoft's SAM database it will be whether illegal or hard because Windows keep updating their security package to secure this database.
Is there any possibility that whenever user update the password, we get the password value, and update our "database"?
Or should I save our local database's content with another format?
Like, instead of using the user's information in a plain text for login using our Custom Credential Provider, can I use part of the SAM's value to login?
Your credential provider should implement the CPUS_CHANGE_PASSWORD scenario which is triggered in the change password GUI workflow.
At that point, in ICredentialProviderCredential::GetSerialization, you should have the raw non encrypted password value.
Then in ICredentialProviderCredential::ReportResult, if NTSTATUS == STATUS_SUCCESS you could do whatever you want, including updating your database.
Okay, I think I did something stupid here. I had forgotten my Win10 user account (steph) Password. This is an admin account.
1) Using a Linux-type usb-boot utility, I've been able to blank the password. Upon reboot, I entered a blank password but I still cannot login, it seems that my account physically on the computer now doesn't match my Hotmail credentials -or something- and I'm still locked out.
2) Using the same Linux usb boot utility, I've unlocked the 'Administrator' account. Now I can login using the 'Administrator' account but from the Control Panel, I cannot change my own user account (steph) password, the option for it is just not there (perhaps it's because the password is believed to be blank?)
3) Later I've been able to find the piece of paper on which I wrote my original password for my own account.
Q: Is there's a way to set my original password back to what it was in order to unlock my account?
Thanks.
Many Linux usb boot utilities can work with local account only. I suggest you set up a new Microsoft account on your PC, and point it to your old profile directory. Then remove your original Microsoft account from Control Panel.
Hello am a newbie with windows store app so am devoloping an app that requires a user to register before he can login so am trying to figure out how to get user inputs on registration form mayb store it a database or sometging so that he can login with the exact same registered details!
Xaml windows store app
To get the users' registration details, you could retrieve the credentials from the Credential Locker after you have a reference to the PasswordVault object.
You can implement PasswordVault.RetrieveAll() method to retrieve all the user has supplied for your app.
You might refer to the sample Retrieving user credentials:
"where we have stored the resource name globally in an app and we log the user on automatically if we find a credential for them. If we find multiple credentials for the same user, we ask the user to select a default credential to use when logging on".
To store these details, you need to use PasswordVault.Add() method to pass the username and password to a PasswordCredential object:
var vault = new Windows.Security.Credentials.PasswordVault();
vault.Add(new Windows.Security.Credentials.PasswordCredential(
"My App", username, password));
For more details, please see Windows.Security.Credentials.
If you want to store them into a database, you can use SQLite to save and get the data. To learn how to use SQLite on the Universal Windows Platform , please refer to this blog written by #Diederik Krols.
I want to implement a self reset password functionality for Windows 7 users. When the Logon screen prompts the domain users should be presented with a forgot password button which will open the password reset wizard. So the problem is how to add a command button to the standard windows logon screen?
I know about GINA in Windows XP as mentioned here:
Adding command button to Windows Logon screen
But this topic is 3 years old, and with Vista / Windows 7 Microsoft came up with "Microsoft Windows Credential Provider".
Those button are called "Tiles", and they are implemented in a Credential Provider. Anything you read about a Gina will not work in Vista or later.
Those tiles a created by the LogonUI.exe process, itself launched by Winlogon.exe. LogonUI.exe runs with high priviledges. You don't want to run anything there. Besides, any wizard you run will run under the system account. Security issues aside, anything that resets the password of the current user will not work.
But let's assume that you have a solution that can reset a user's password. Like a web site (or a local application) that :
Ask for the user's name
Ask some security questions
Connects to Active Directory to reset the password
Then here is a way to implement the functionality.
Create a user, a domain user if possible. Give it a name and a password easy to remember, like "reset" and "reset". Make shure that everybody knows the password.
Change the shell of that user to Internet Explorer, that you would be running in kiosk mode, pointing to your web application.
Now when someone wants to reset their password, here is what they will do :
Use the standard Windows Credential Provider, like they do every day, but with the user "reset" and the password "reset".
Instead of the normal Windows shell, they will be presented with your password reset web application.
The user resets their password and they are instructed to log off using CTRLATLDEL
They can log in with their own username and brand new password.
This idea can be improved upon if you are ready to write some code:
Instead of Internet Explorer, write a simple web application that wraps the web browser control. if the application is closed, or any other funny business, logoff.
Hack one of the Credential Provider samples to supply the well know password reset username and password, making password reset merely a click away
Change that password reset credential provider's image to reflect the password reset functionnality.
Is there any API to get the currently logged in user's name and password in Windows?
Thank you in advance.
Password: No, this is not retained for security reasons - it's used, then discarded. You could retrieve the encrypted password for this user from the registry, given sufficient privileges, then decrypt it using something like rainbow tables, but that's extremely resource intensive and time consuming using current methods. Much better to prompt the user.
Alternatively, if you want to implement some sort of 'single signon' system as Novell does, you should do it via either a GINA (pre-Vista) or a Credential Provider (Vista), which will result in your code being given the username and password at login, the only time at which the password is available.
For username, getting the current username (the one who is running your code) is easy: the GetUserName function in AdvApi32.dll does exactly this for you.
If you're running as a service, you need to remember there is no one "logged in user": there are several at any time, such as LocalSystem, NetworkService, SYSTEM and other accounts, in addition to any actual people. This article provides some sample code and documentation for doing that.
For the many commenters who believe it is not possible to reveal the password of the currently logged-in user, see Dump cleartext passwords of logged in user(s) which shows how to use mimikatz to do just that:
mimikatz # privilege::debug
Demande d'ACTIVATION du privilège : SeDebugPrivilege : OK
mimikatz # sekurlsa::logonPasswords full
...
Utilisateur principal : user
Domaine d'authentification : domain
kerberos :
* Utilisateur : user
* Domaine : domain
* Mot de passe : pass
I'd consider it a huge security flaw if that were possible!
You can't get the password of a user since its encrypted (not to mention that its a standard practice not to store passwords in plaintext).
For getting the username, you can use GetUserName or NPGetUser
Note sure how it is done, but "Network Password Recovery" tool from http://www.nirsoft.net/utils/network_password_recovery.html seems to get the password from some cache.
GetUserName will get you the name, but the password you can't get. It's not even something Windows stores, AFAIK - only a hash of your password.
Depending on what you're trying to achieve (you can tell us a bit more..) it's possible to impersonate a logged on user and do stuff on his/her behalf.
Full details of Authentication in the Windows API can be found on MSDN:
http://msdn.microsoft.com/en-us/library/aa374735(VS.85).aspx
I don't know about the windows login password... but you can definitely pull plaintext passwords from the Credentials Manager. For example here is a program to pull the password for TFS. In most cases, this is the same as the Windows Login.
namespace ShowPassword
{
using Microsoft.TeamFoundation.Client;
using System;
using System.Net;
class Program
{
static void Main(string[] args)
{
var tpc = new TfsTeamProjectCollection(new Uri("http://mycompany.com/tfs"));
var nc = tpc.Credentials as NetworkCredential;
Console.WriteLine("the password is " + nc.Password);
}
}
}
I compiled this as "console" app under vs 2015 with Nuget package TeamFoundation ExtendedClient.
You can get the user name with GetUserName(), but you cannot get the password; this would violate security for dummies 101.
re "Network Password Recovery" tool
Windows (upto XP) stores a copy of the passwd with a simpler easy to break encryption - for connecting to older style lanmanager network shares.
The tools generaly try all possible passwords against this, using rainbow tables (precaluted encrypted versions of dictionary words) speeds this up.
In XPsp2/3 Vista this feature is removed. The new encryption is much harder to crack and needs many hours to try all possible values, there are online services that will run it on large number of machines to give you a quick answer for a price.
To answer the original poster - you do not generally store the password and compare it with what the user typd in. You encrypt (actually hash) the entered password and store that. To check a password you perform the same encryption on whatever the user enetered and compare that. It is generally impossible to go from the encrypted form back to the real password.
EDIT I suspect you are asking the wrong question here - why do you want the password, what are you trying to verify and when?