I have been given the simple task to do Windows authentication against the AD from a Windows Compact 7 device in a C# app. Now - 14 days later I'm still struggling, so any help would be greatly appreciated.
Anyway - what I’ve managed to come up with so far is doing Windows authentication on my PC using the wldap32.dll. I’m far from a C++ expert, and with Visual C++ even less so, so bear with me. Here is my C++ code:
EXPORT_METHOD unsigned long Authenticate(char *userName, char *password, char *domain)
{
unsigned long result = 0;
unsigned short *uUserName = (unsigned short *)userName;
unsigned short *uPassword = (unsigned short *)password;
unsigned short *uDomain = (unsigned short *)domain;
PWCHAR hostName = NULL;
LDAP* pLdapConnection = NULL;
ULONG version = LDAP_VERSION3;
size_t origsize = strlen("ELLAB.COM") + 1;
size_t convertedChars = 0;
wchar_t wcstring[100];
mbstowcs_s(&convertedChars, wcstring, origsize, "ELLAB.COM", _TRUNCATE);
wcscat_s(wcstring, L" (wchar_t *)");
hostName = wcstring;
// Initialize a session. LDAP_PORT is the default port, 389.
pLdapConnection = ldap_init(hostName, LDAP_PORT);
if (pLdapConnection == NULL)
{
#ifdef DEBUG
AfxMessageBox(_T("Unable to Init"));
#endif // DEBUG
result = 0xff;
}
else
{
// Set the version to 3.0 (default is 2.0).
result = ldap_set_option(pLdapConnection, LDAP_OPT_PROTOCOL_VERSION, (void*)&version);
if (result != LDAP_SUCCESS)
{
#ifdef DEBUG
AfxMessageBox(_T("Unable to Set Optins"));
#endif // DEBUG
}
else
{
// Connect to the server.
result = ldap_connect(pLdapConnection, NULL);
if (result != LDAP_SUCCESS)
{
#ifdef DEBUG
AfxMessageBox(_T("Unable to Connect"));
#endif // DEBUG
}
else
{
// Be aware that the password itself is never sent over the network, and encryption is not used.
SEC_WINNT_AUTH_IDENTITY NtAuthIdentity;
ZeroMemory(&NtAuthIdentity, sizeof(NtAuthIdentity));
NtAuthIdentity.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
NtAuthIdentity.Domain = uDomain;
NtAuthIdentity.DomainLength = sizeof(uDomain);
NtAuthIdentity.User = uUserName;
NtAuthIdentity.UserLength = sizeof(uUserName);
NtAuthIdentity.Password = uPassword;
NtAuthIdentity.PasswordLength = sizeof(uPassword);
//if (ldap_bind_s(pLdapConnection, NULL, NULL, LDAP_AUTH_NEGOTIATE) == LDAP_SUCCESS)
result = ldap_bind_s(pLdapConnection, NULL, (PWCHAR)&NtAuthIdentity, LDAP_AUTH_NTLM);
//if (result != LDAP_SUCCESS)
{
#ifdef DEBUG
AfxMessageBox(_T("Unable to Bind using ldap_bind_s"));
#endif // DEBUG
result = ldap_bind(pLdapConnection, NULL, (PWCHAR)&NtAuthIdentity, LDAP_AUTH_NTLM);
if (result != LDAP_SUCCESS)
{
#ifdef DEBUG
AfxMessageBox(_T("Unable to Bind using ldap_bind"));
#endif // DEBUG
}
}
}
}
// Normal cleanup and exit.
ldap_unbind(pLdapConnection);
}
return result;
}
And my C# sample wrapper:
[DllImport(@"C:\Users\ckbn.ELLAB\Documents\Visual Studio 2015\Projects\WCE7_LDAP\Debug\LDAPHandler.dll", CharSet = CharSet.Unicode)]
public static extern int Authenticate(string userName, string password, string domain);
private void buttonAuthenticate_Click(object sender, EventArgs e)
{
try
{
textBoxResult.Text = "";
LDAPReturns result = (LDAPReturns)Authenticate(textBoxUserName.Text, textBoxPassword.Text, textBoxDomain.Text);
switch (result)
{
case LDAPReturns.LDAP_SUCCESS:
textBoxResult.Text = "User '" + textBoxUserName.Text + "' is authenticated";
break;
default:
textBoxResult.Text = result.ToString();
break;
}
}
catch (Exception ex) { textBoxResult.Text = "Failed: " + ex.ToString(); }
}
So - using the above code I can authenticate with my own credentials on my PC. Running the same code on the WCE device, I can connect to the AD server, but when I try to ldap_bind_s, it returns LDAP_AUTH_METHOD_NOT_SUPPORTED. So I’m thinking the the ARM version of the wldap32.dll is different from the x86 version.
Then I tried to use the ldap_bind (without ‘_s’) method. This is not working nighter on my PC nor on the WCE device and always returns 0xFFFF_FFFF.
So basically my questions are:
What does LDAP_AUTH_METHOD_NOT_SUPPORTED means, and what other methods do I have on a WCE7 device? and
What does it means when ldap_bind returns 0xFFFF_FFFF?
But any input or suggestion would be highly appreciated. Thanks in advance!
