Could not validate a username and password

Question

I need to validate that the user inputs are corrects to the current session windows. Thus I use the code below :

private void LoginUser(string username, string password)
{
    bool isCredentialValid = false;

    using (PrincipalContext context = new PrincipalContext(ContextType.Domain))
    {
        isCredentialValid = context.ValidateCredentials(username, password);
    }
    if (isCredentialValid)
    {
        //
    }
    else
    {
        //
    }
}

The problem that I always get false as ValidateCredentials result.

Rq : I'm using .Net 4.5 framework

did you check this out? http://stackoverflow.com/questions/2363620/principalcontext-validatecredentials-always-returns-false — Ivan Yuriev, Apr 19 '16 at 13:25
Make sure the application has access to the domain with correct credentials — Camilo Terevinto, Apr 19 '16 at 13:25
check whether you are getting any extra characters with your username or password — Raghuveer, Apr 19 '16 at 13:25

score 3 · Accepted Answer · edited Apr 20 '16 at 13:36

3

From MSDN http://msdn.microsoft.com/en-us/library/bb154889.aspx

The ValidateCredentials method binds to the server specified in the constructor. If the username and password parameters are null, the credentials specified in the constructor are validated. If no credential were specified in the constructor, and the username and password parameters are null, this method validates the default credentials for the current principal.

In the PrincipalContext constructor you could specify the credentials you want to check as well.

 using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, domain, 
                   container, ContextOptions.SimpleBind, username, password))
{
    return pc.ValidateCredentials(domain + @"\" + username, password,
                               ContextOptions.SimpleBind);
}

Try this one.

edited Apr 20 '16 at 13:36

M.S.

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answered Apr 19 '16 at 13:29

error_handler

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Don't use `ContextOptions.SimpleBind` it will send your password with clear text – Raghuveer Apr 19 '16 at 13:31
1

@irvgk,No, ContextOptions.SimpleBind means to use Basic Authentication . It does not mean of sending password with cleartext. – error_handler Apr 19 '16 at 13:36
Thank you for the answer and It works even without specifying ContextOptions – MRebai Apr 19 '16 at 13:47

Could not validate a username and password

1 Answers1