public static extern CredUIReturnCodes CredUIPromptForWindowsCredentials(
ref CREDUI_INFO pUiInfo,
uint dwAuthError,
ref uint pulAuthPackage,
IntPtr pvInAuthBuffer,
uint ulInAuthBufferSize,
out IntPtr ppvOutAuthBuffer,
out uint pulOutAuthBufferSize,
[MarshalAs(UnmanagedType.Bool)] ref bool pfSave,
CredUIWinFlags dwFlags);
public static extern uint CredUIPromptForWindowsCredentials(
ref CREDUI_INFO credInfo,
int authError,
ref uint authPackage,
IntPtr InAuthBuffer,
uint InAuthBufferSize,
out IntPtr refOutAuthBuffer,
out uint refOutAuthBufferSize,
ref bool fSave,
CredUIWinFlags flags);
public static extern CredUIReturnCodes CredUIPromptForWindowsCredentials(
ref CREDUI_INFO pUiInfo,
uint dwAuthError,
ref uint pulAuthPackage,
IntPtr pvInAuthBuffer,
uint ulInAuthBufferSize,
out IntPtr ppvOutAuthBuffer,
out uint pulOutAuthBufferSize,
[MarshalAs(UnmanagedType.Bool)]ref bool pfSave,
CredUIWinFlags dwFlags);
public Task <Credentials> GetUserCredentialsAsync(string authority, string workspaceName, CancellationToken cancellationToken = default(CancellationToken))
{
_coreShell.AssertIsOnMainThread();
var credentials = SecurityUtilities.ReadCredentials(authority);
if (credentials != null)
{
return(Task.FromResult(credentials));
}
var credui = new CREDUI_INFO {
cbSize = Marshal.SizeOf(typeof(CREDUI_INFO)),
hwndParent = _coreShell.AppConstants.ApplicationWindowHandle,
pszCaptionText = Resources.Info_ConnectingTo.FormatInvariant(workspaceName)
};
uint authPkg = 0;
IntPtr credStorage = IntPtr.Zero;
uint credSize;
bool save = true;
CredUIWinFlags flags = CredUIWinFlags.CREDUIWIN_CHECKBOX;
// For password, use native memory so it can be securely freed.
IntPtr passwordStorage = SecurityUtilities.CreatePasswordBuffer();
int inCredSize = 1024;
IntPtr inCredBuffer = Marshal.AllocCoTaskMem(inCredSize);
try {
if (!CredPackAuthenticationBuffer(0, WindowsIdentity.GetCurrent().Name, "", inCredBuffer, ref inCredSize))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error);
}
var err = CredUIPromptForWindowsCredentials(ref credui, 0, ref authPkg, inCredBuffer, (uint)inCredSize, out credStorage, out credSize, ref save, flags);
if (err != 0)
{
throw new OperationCanceledException();
}
StringBuilder userNameBuilder = new StringBuilder(CRED_MAX_USERNAME_LENGTH);
int userNameLen = CRED_MAX_USERNAME_LENGTH;
StringBuilder domainBuilder = new StringBuilder(CRED_MAX_USERNAME_LENGTH);
int domainLen = CRED_MAX_USERNAME_LENGTH;
int passLen = CREDUI_MAX_PASSWORD_LENGTH;
if (!CredUnPackAuthenticationBuffer(CRED_PACK_PROTECTED_CREDENTIALS, credStorage, credSize, userNameBuilder, ref userNameLen, domainBuilder, ref domainLen, passwordStorage, ref passLen))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
return(Task.FromResult(Credentials.CreateCredentails(userNameBuilder.ToString(), SecurityUtilities.SecureStringFromNativeBuffer(passwordStorage), save)));
} finally {
if (inCredBuffer != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(inCredBuffer);
}
if (credStorage != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(credStorage);
}
if (passwordStorage != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(passwordStorage);
}
}
}
