public static CredUIReturnValues ShowPromptForWindowsCredentials(CredentialUI_Info credui, CredUIPromptFlags flags, out NetworkCredential cred)
{
if (IsWinVistaOrHigher())
{
throw new InvalidOperatingSystemException("Windows XP");
}
credui.cbSize = Marshal.SizeOf(credui);
uint authPackage = 0;
IntPtr outCredBuffer = new IntPtr();
uint outCredSize;
bool save = false;
int result = WindowsSecurityNative.CredUIPromptForWindowsCredentials(ref credui,
0,
ref authPackage,
IntPtr.Zero,
0,
out outCredBuffer,
out outCredSize,
ref save,
(int)flags);
cred = null;
if (result == 0)
{
var usernameBuf = new StringBuilder(100);
var passwordBuf = new StringBuilder(100);
var domainBuf = new StringBuilder(100);
int maxUserName = 100;
int maxDomain = 100;
int maxPassword = 100;
if (WindowsSecurityNative.CredUnPackAuthenticationBuffer(0, outCredBuffer, outCredSize, usernameBuf, ref maxUserName,
domainBuf, ref maxDomain, passwordBuf, ref maxPassword))
{
//TODO: ms documentation says we should call this but i can't get it to work
//SecureZeroMem(outCredBuffer, outCredSize);
//clear the memory allocated by CredUIPromptForWindowsCredentials
WindowsSecurityNative.CoTaskMemFree(outCredBuffer);
cred = new NetworkCredential()
{
UserName = usernameBuf.ToString(),
Password = passwordBuf.ToString(),
Domain = domainBuf.ToString()
};
}
}
return((CredUIReturnValues)result);
}
public static void GetCredentialsVistaAndUp(string captionText, string messageText, out NetworkCredential networkCredential, IntPtr pointer)
{
CredentialUI_Info credui = new CredentialUI_Info();
//credui.pszCaptionText = "Please enter the credentails for " + serverName;
credui.pszCaptionText = captionText;
credui.pszMessageText = messageText;
credui.hwndParent = pointer;
credui.cbSize = Marshal.SizeOf(credui);
uint authPackage = 0;
IntPtr outCredBuffer = new IntPtr();
uint outCredSize;
bool save = false;
int result = WindowsSecurityNative.CredUIPromptForWindowsCredentials(ref credui,
0,
ref authPackage,
IntPtr.Zero,
0,
out outCredBuffer,
out outCredSize,
ref save,
1 /* Generic */);
var usernameBuf = new StringBuilder(100);
var passwordBuf = new StringBuilder(100);
var domainBuf = new StringBuilder(100);
int maxUserName = 100;
int maxDomain = 100;
int maxPassword = 100;
if (result == 0)
{
if (WindowsSecurityNative.CredUnPackAuthenticationBuffer(0, outCredBuffer, outCredSize, usernameBuf, ref maxUserName,
domainBuf, ref maxDomain, passwordBuf, ref maxPassword))
{
//TODO: ms documentation says we should call this but i can't get it to work
//SecureZeroMem(outCredBuffer, outCredSize);
//clear the memory allocated by CredUIPromptForWindowsCredentials
WindowsSecurityNative.CoTaskMemFree(outCredBuffer);
networkCredential = new NetworkCredential()
{
UserName = usernameBuf.ToString(),
Password = passwordBuf.ToString(),
Domain = domainBuf.ToString()
};
return;
}
}
networkCredential = null;
}
