public object MarshalNativeToManaged(IntPtr pNativeData)
{
if (pNativeData == IntPtr.Zero)
{
return(null);
}
var ncred = (NATIVECREDENTIAL)Marshal.PtrToStructure(pNativeData, typeof(NATIVECREDENTIAL));
var securePass = (ncred.CredentialBlob == IntPtr.Zero) ? new SecureString()
: SecureStringHelper.CreateSecureString(ncred.CredentialBlob, (int)(ncred.CredentialBlobSize) / 2);
var credEx = new PSObject(new PSCredential(ncred.UserName ?? "-", securePass));
credEx.Members.Add(new PSNoteProperty("Target", ncred.TargetName));
credEx.Members.Add(new PSNoteProperty("TargetAlias", ncred.TargetAlias));
credEx.Members.Add(new PSNoteProperty("Type", (CredentialType)ncred.Type));
credEx.Members.Add(new PSNoteProperty("Persistence", (PersistanceType)ncred.Persist));
credEx.Members.Add(new PSNoteProperty("Description", ncred.Comment));
credEx.Members.Add(new PSNoteProperty("LastWriteTime", DateTime.FromFileTime((((long)ncred.LastWritten.dwHighDateTime) << 32) + ncred.LastWritten.dwLowDateTime)));
return(credEx);
}
public override DialogResult ShowDialog(IntPtr owner)
{
CheckNotDisposed();
if (string.IsNullOrEmpty(Title) && string.IsNullOrEmpty(Message))
{
throw new InvalidOperationException("Title or Message should always be set.");
}
if (!IsWinVistaOrHigher)
{
throw new InvalidOperationException("This Operating System does not support this prompt.");
}
uint authPackage = 0;
IntPtr outCredBuffer;
uint outCredSize;
IntPtr inCredBuffer = IntPtr.Zero;
int inCredBufferSize = 0;
bool persist = SaveChecked;
NativeMethods.CREDUI_INFO credUI = CreateCREDUI_INFO(owner);
if (!string.IsNullOrEmpty(Username) || !string.IsNullOrEmpty(SecureStringHelper.CreateString(SecurePassword)))
{
// This seems to be very hacky but don't know a better way to do it yet
// Call this method with the same credentials with the empty credentials buffer so that we can get it's size first
// but it throws an error because the buffer is too small. So we'll re-initialize the buffer with correct size
// and call again to populate the buffer this time.
NativeMethods.CredPackAuthenticationBuffer(0, new StringBuilder(Username), new StringBuilder(SecureStringHelper.CreateString(SecurePassword)), inCredBuffer, ref inCredBufferSize);
if (Marshal.GetLastWin32Error() == 122)
{
// returned from prior method call and we now should have a valid size for the buffer
inCredBuffer = Marshal.AllocCoTaskMem(inCredBufferSize);
if (!NativeMethods.CredPackAuthenticationBuffer(0, new StringBuilder(Username), new StringBuilder(SecureStringHelper.CreateString(SecurePassword)), inCredBuffer, ref inCredBufferSize))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "There was an issue with the given Username or Password.");
}
}
}
//Show the dialog
NativeMethods.CredUIReturnCodes dialogResult;
try
{
dialogResult = NativeMethods.CredUIPromptForWindowsCredentials(ref credUI, ErrorCode, ref authPackage,
inCredBuffer,
//You can force that a specific username is shown in the dialog. Create it with 'CredPackAuthenticationBuffer()'. Then, the buffer goes here...
(uint)inCredBufferSize,
//...and the size goes here. You also have to add CREDUIWIN_IN_CRED_ONLY to the flags (last argument).
out outCredBuffer,
out outCredSize,
ref persist,
DialogFlags);
// If the user has checked the Save Credentials checkbox then the persist variable
// will be set to true and we want to set it so that the consumer can approprietly act
// on the user action.
SaveChecked = persist;
}
catch (EntryPointNotFoundException e)
{
throw new InvalidOperationException("This functionality is not supported by this operating system.", e);
}
switch (dialogResult)
{
case NativeMethods.CredUIReturnCodes.ERROR_CANCELLED:
return(DialogResult.Cancel);
case NativeMethods.CredUIReturnCodes.ERROR_NO_SUCH_LOGON_SESSION:
case NativeMethods.CredUIReturnCodes.ERROR_NOT_FOUND:
case NativeMethods.CredUIReturnCodes.ERROR_INVALID_ACCOUNT_NAME:
case NativeMethods.CredUIReturnCodes.ERROR_INSUFFICIENT_BUFFER:
case NativeMethods.CredUIReturnCodes.ERROR_INVALID_PARAMETER:
case NativeMethods.CredUIReturnCodes.ERROR_INVALID_FLAGS:
case NativeMethods.CredUIReturnCodes.ERROR_BAD_ARGUMENTS:
throw new InvalidOperationException("Invalid properties were specified.", new Win32Exception(Marshal.GetLastWin32Error()));
}
int maxUsername = 1000;
int maxPassword = 1000;
int maxDomain = 1000;
StringBuilder usernameBuffer = new StringBuilder(1000);
StringBuilder passwordBuffer = new StringBuilder(1000);
StringBuilder domainBuffer = new StringBuilder(1000);
bool result = NativeMethods.CredUnPackAuthenticationBuffer(0, outCredBuffer, outCredSize,
usernameBuffer,
ref maxUsername, domainBuffer,
ref maxDomain,
passwordBuffer, ref maxPassword);
if (result)
{
NativeMethods.CoTaskMemFree(outCredBuffer);
Username = usernameBuffer.ToString();
Password = passwordBuffer.ToString();
if (passwordBuffer.Length > 0)
{
passwordBuffer.Remove(0, passwordBuffer.Length);
}
}
return(DialogResult.OK);
}
