public static PSCredential PromptForCredentials(IntPtr parentWindow, string displayName, Uri targetUri, string errorMessage, ref bool pfSave)
{
string text = errorMessage;
NativeMethods.CREDUI_INFO credUiInfo;
credUiInfo..ctor(parentWindow);
credUiInfo.pszCaptionText = Strings.CredentialInputDialogTitle(displayName);
NativeMethods.CredUIReturnCodes credUIReturnCodes;
for (;;)
{
credUiInfo.pszMessageText = (text ?? string.Empty);
string userName;
SecureString password;
credUIReturnCodes = (WinformsHelper.IsWin7OrLater() ? CredentialHelper.SspiPromptForCredentials(credUiInfo, targetUri, ref pfSave, out userName, out password) : CredentialHelper.CredUIPromptForCredentials(credUiInfo, ref pfSave, out userName, out password));
if (credUIReturnCodes == null)
{
try
{
return(new PSCredential(userName, password));
}
catch (PSArgumentException)
{
text = Strings.InvalidUserNameOrPassword;
continue;
}
}
if (credUIReturnCodes == 1223)
{
break;
}
if (credUIReturnCodes != 1315)
{
goto IL_8F;
}
text = Strings.InvalidUserNameOrPassword;
}
return(null);
IL_8F:
throw new InvalidOperationException(string.Format("PromptForCredentials failed with error {0}.", credUIReturnCodes.ToString()));
}
private static NativeMethods.CredUIReturnCodes SspiPromptForCredentials(NativeMethods.CREDUI_INFO credUiInfo, Uri targetUri, ref bool pfSave, out string userName, out SecureString password)
{
IntPtr zero = IntPtr.Zero;
NativeMethods.CredUIReturnCodes credUIReturnCodes = NativeMethods.SspiPromptForCredentials(targetUri.Host, ref credUiInfo, 0U, "Negotiate", IntPtr.Zero, ref zero, ref pfSave, 1);
if (credUIReturnCodes == null)
{
try
{
CredentialHelper.AuthIdentityToCredential(zero, out userName, out password);
return(credUIReturnCodes);
}
finally
{
NativeMethods.SspiFreeAuthIdentity(zero);
}
}
userName = null;
password = null;
return(credUIReturnCodes);
}