/// <summary>
/// When overridden in a derived class, specifies a common dialog box.
/// </summary>
/// <param name="parentWindowHandle">A value that represents the window handle of the owner window for the common dialog box.</param>
/// <returns>
/// true if the dialog box was successfully run; otherwise, false.
/// </returns>
protected override bool RunDialog(IntPtr parentWindowHandle)
{
NativeMethods.CREDUI_INFO info = new NativeMethods.CREDUI_INFO(parentWindowHandle, Caption, Message, Banner);
try
{
if (Environment.OSVersion.Version.Major <= 5 || ForcePreVistaStyle)
{
StringBuilder userName = new StringBuilder(UserName, maxStringLength);
StringBuilder password = new StringBuilder(maxStringLength);
bool save = SaveChecked;
if (string.IsNullOrEmpty(Target))
{
Target = DefaultTarget;
}
NativeMethods.CredUIReturnCodes ret = NativeMethods.CredUIPromptForCredentials(ref info, Target, IntPtr.Zero,
AuthenticationError, userName, maxStringLength, password, maxStringLength, ref save,
NativeMethods.CredentialsDialogOptions.Default | (SaveChecked ? NativeMethods.CredentialsDialogOptions.ShowSaveCheckBox : 0));
switch (ret)
{
case NativeMethods.CredUIReturnCodes.Success:
if (ValidatePassword && !IsValidPassword(userName.ToString(), password.ToString()))
{
return(false);
}
/*if (save)
* {
* CredUIReturnCodes cret = CredUIConfirmCredentials(this.Target, false);
* if (cret != CredUIReturnCodes.NO_ERROR && cret != CredUIReturnCodes.ERROR_INVALID_PARAMETER)
* {
* this.Options |= CredentialsDialogOptions.IncorrectPassword;
* return false;
* }
* }*/
break;
case NativeMethods.CredUIReturnCodes.Cancelled:
return(false);
default:
throw new InvalidOperationException($"Unknown error in CredentialsDialog. Error: 0x{ret:X}");
}
if (EncryptPassword)
{
// Convert the password to a SecureString
SecureString newPassword = StringBuilderToSecureString(password);
// Clear the old password and set the new one (read-only)
if (SecurePassword != null)
{
SecurePassword.Dispose();
}
newPassword.MakeReadOnly();
SecurePassword = newPassword;
}
else
{
Password = password.ToString();
}
// Update other properties
UserName = userName.ToString();
SaveChecked = save;
return(true);
}
else
{
NativeMethods.WindowsCredentialsDialogOptions flag = NativeMethods.WindowsCredentialsDialogOptions.Generic;
if (SaveChecked)
{
flag |= NativeMethods.WindowsCredentialsDialogOptions.ShowSaveCheckBox;
}
NativeMethods.AuthenticationBuffer buf = null;
if (EncryptPassword && SecurePassword != null)
{
buf = new NativeMethods.AuthenticationBuffer(UserName.ToSecureString(), SecurePassword);
}
else
{
buf = new NativeMethods.AuthenticationBuffer(UserName, Password);
}
IntPtr outAuthBuffer = IntPtr.Zero;
uint outAuthBufferSize = 0, authPackage = 0;
bool save = SaveChecked;
var retVal = NativeMethods.CredUIPromptForWindowsCredentials(ref info, 0, ref authPackage,
buf, (uint)buf.Size, out outAuthBuffer, out outAuthBufferSize, ref save, flag);
var outAuth = new NativeMethods.AuthenticationBuffer(outAuthBuffer, (int)outAuthBufferSize);
if (retVal == NativeMethods.CredUIReturnCodes.Cancelled)
{
return(false);
}
if (retVal != NativeMethods.CredUIReturnCodes.Success)
{
throw new Win32Exception((int)retVal);
}
SaveChecked = save;
if (EncryptPassword)
{
SecureString u, d, p;
outAuth.UnPack(true, out u, out d, out p);
Password = null;
SecurePassword = p;
UserName = $"{d.ToInsecureString()}\\{u.ToInsecureString()}".TrimStart('\\');
}
else
{
string u, d, p;
outAuth.UnPack(true, out u, out d, out p);
Password = p;
SecurePassword = null;
UserName = $"{d}\\{u}".TrimStart('\\');
if (ValidatePassword && !IsValidPassword(UserName, Password))
{
return(false);
}
}
return(true);
}
}
finally
{
info.Dispose();
}
}