static SafeToken LogonUserAndGetToken(string username, string password)
{
return(SafeToken.LogonUser(
username,
password,
LOGON32_LOGON_NETWORK,
LOGON32_PROVIDER_DEFAULT));
}
internal static extern bool LogonUser(
[MarshalAs(UnmanagedType.LPTStr)]
string lpszUsername,
[MarshalAs(UnmanagedType.LPTStr)]
string lpszDomain,
IntPtr lpszPassword,
int dwLogonType,
int dwLogonProvider,
out SafeToken phToken
);
static bool IsAdmin(string userName, string password)
{
SafeToken token = Credentials.GetTokenFromCredentials(userName, password);
WindowsIdentity identity = new WindowsIdentity(token.DangerousGetHandle());
if (identity.IsSystem)
{
return(true);
}
WindowsPrincipal principal = new WindowsPrincipal(identity);
if (principal.IsInRole(WindowsBuiltInRole.Administrator))
{
return(true);
}
return(false);
}
internal static int ValidateCredentials(string username, string password, bool throwException)
{
try
{
using (SafeToken token = LogonUserAndGetToken(username, password))
{
return(0);
}
}
catch (Win32Exception exception)
{
if (throwException)
{
throw new System.Security.Authentication.AuthenticationException(exception.Message, exception);
}
return(exception.ErrorCode);
}
}
internal static extern bool LogonUser(
[MarshalAs(UnmanagedType.LPTStr)]
string lpszUsername,
[MarshalAs(UnmanagedType.LPTStr)]
string lpszDomain,
IntPtr lpszPassword,
int dwLogonType,
int dwLogonProvider,
out SafeToken phToken
);
