PasswordNotMatch error in authentication.asmx web service

Question

I am trying to authenticate to SharePoint site using the authentication.asmx web service. The code is as below.

  public bool Authenticate()
  {
    String username = "......"; 
    String password = "......";
    Cookie _authCookie;
    CookieContainer _cookieContainer;


    AuthService.Authentication authentication = new AuthService.Authentication();
    authentication.Url = "<web_url>/_vti_bin/Authentication.asmx";
    authentication.CookieContainer = new CookieContainer();
    authentication.AllowAutoRedirect = true;
    authentication.PreAuthenticate = true;
    AuthService.LoginResult loginResult = authentication.Login(username, password);

    _authCookie = new Cookie();

    if (loginResult.ErrorCode == AuthService.LoginErrorCode.NoError)
    {
        CookieCollection cookies = authentication.CookieContainer.GetCookies(new Uri(authentication.Url));
        _authCookie = cookies[loginResult.CookieName];
        _cookieContainer = new CookieContainer();
        _cookieContainer.Add(_authCookie);
        return true;
    }
    else
        return false;
  }

But I am getting an error "PasswordNotMatch" in ErrorCode, even though the username and password I am entering is correct.

The AuthService is a Service Reference to the authentication.asmx web service

Did anybody solve the issue?

Answer 1

the question has been answered before, look at ashish answer as it implements your code. I think the area your going wrong is in the cookie part.

Windows authentication with SharePoint Web Services via SOAP

the code is for list authentication but a slight alteration would give you site authentication. The principal is the same!

EDIT

AuthService.Authentication authentication = new AuthService.Authentication();
authentication.Url = "<web_url>/_vti_bin/Authentication.asmx";
authentication.CookieContainer = new CookieContainer();
authentication.AllowAutoRedirect = true;
authentication.PreAuthenticate = true;
AuthenticationSoap authenticationSoap = null;
authenticationSoap = authentication.getAuthenticationSoap();
AuthServiceLoginResult loginResult = authenticationSoap.Login(username, password);

try adding the authentication soap call aswell! should work for on-premise

a similar answer answered by me here How to authenticate user in SharePoint online using javascript it also explains on soap calls.