internal static bool BeginImpersonation(NetCred credential, out IntPtr hUserToken)
{
hUserToken = IntPtr.Zero;
IntPtr zero = IntPtr.Zero;
if (credential != null)
{
string parsedUserName = credential.ParsedUserName;
string password = credential.Password;
string domain = credential.Domain;
if (parsedUserName != null || password != null)
{
int num = UnsafeNativeMethods.LogonUser(parsedUserName, domain, password, 9, 3, ref zero);
if (num != 0)
{
num = UnsafeNativeMethods.ImpersonateLoggedOnUser(zero);
if (num != 0)
{
hUserToken = zero;
return(true);
}
else
{
int lastWin32Error = Marshal.GetLastWin32Error();
UnsafeNativeMethods.CloseHandle(zero);
object[] objArray = new object[1];
objArray[0] = lastWin32Error;
throw new PrincipalOperationException(string.Format(CultureInfo.CurrentCulture, StringResources.UnableToImpersonateCredentials, objArray));
}
}
else
{
int lastWin32Error1 = Marshal.GetLastWin32Error();
object[] objArray1 = new object[1];
objArray1[0] = lastWin32Error1;
throw new PrincipalOperationException(string.Format(CultureInfo.CurrentCulture, StringResources.UnableToImpersonateCredentials, objArray1));
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}
internal static bool BeginImpersonation(NetCred credential, out IntPtr hUserToken)
{
GlobalDebug.WriteLineIf(GlobalDebug.Info, "Utils", "Entering BeginImpersonation");
hUserToken = IntPtr.Zero;
IntPtr hToken = IntPtr.Zero;
// default credential is specified, no need to do impersonation
if (credential == null)
{
GlobalDebug.WriteLineIf(GlobalDebug.Info, "Utils", "BeginImpersonation: nothing to impersonate");
return(false);
}
// Retrive the parsed username which has had the domain removed because LogonUser
// expects creds this way.
string userName = credential.ParsedUserName;
string password = credential.Password;
string domainName = credential.Domain;
// no need to do impersonation as username and password are both null
if (userName == null && password == null)
{
GlobalDebug.WriteLineIf(GlobalDebug.Info, "Utils", "BeginImpersonation: nothing to impersonate (2)");
return(false);
}
GlobalDebug.WriteLineIf(GlobalDebug.Info, "Utils", "BeginImpersonation: trying to impersonate " + userName);
int result = UnsafeNativeMethods.LogonUser(
userName,
domainName,
password,
9, /* LOGON32_LOGON_NEW_CREDENTIALS */
3, /* LOGON32_PROVIDER_WINNT50 */
ref hToken);
// check the result
if (result == 0)
{
int lastError = Marshal.GetLastWin32Error();
GlobalDebug.WriteLineIf(GlobalDebug.Error, "Utils", "BeginImpersonation: LogonUser failed, gle=" + lastError);
throw new PrincipalOperationException(
String.Format(CultureInfo.CurrentCulture,
StringResources.UnableToImpersonateCredentials,
lastError));
}
result = UnsafeNativeMethods.ImpersonateLoggedOnUser(hToken);
if (result == 0)
{
int lastError = Marshal.GetLastWin32Error();
GlobalDebug.WriteLineIf(GlobalDebug.Error, "Utils", "BeginImpersonation: ImpersonateLoggedOnUser failed, gle=" + lastError);
// Close the token the was created above....
UnsafeNativeMethods.CloseHandle(hToken);
throw new PrincipalOperationException(
String.Format(CultureInfo.CurrentCulture,
StringResources.UnableToImpersonateCredentials,
lastError));
}
hUserToken = hToken;
return(true);
}
