/// <summary>
/// This fuction calls CredUIParseUserName() to parse the user name.
/// </summary>
/// <param name="username">The username name to pass.</param>
/// <param name="user">The user part of the username.</param>
/// <param name="domain">The domain part of the username.</param>
/// <returns>Returns true if it successfully parsed the username.</returns>
private static bool ParseUsername(string username, out string user, out string domain)
{
user = string.Empty;
domain = string.Empty;
if (string.IsNullOrEmpty(username))
{
return(false);
}
bool successfullyParsed = true;
StringBuilder strUser = new StringBuilder(Convert.ToInt32(CredUI.CREDUI_MAX_USERNAME_LENGTH));
StringBuilder strDomain = new StringBuilder(Convert.ToInt32(CredUI.CREDUI_MAX_DOMAIN_TARGET_LENGTH));
// Call the OS API to do the parsing.
CredUI.CredUIReturnCodes result = CredUI.CredUIParseUserName(username,
strUser,
CredUI.CREDUI_MAX_USERNAME_LENGTH,
strDomain,
CredUI.CREDUI_MAX_DOMAIN_TARGET_LENGTH);
successfullyParsed = (result == CredUI.CredUIReturnCodes.NO_ERROR);
if (successfullyParsed)
{
user = strUser.ToString();
domain = strDomain.ToString();
}
return(successfullyParsed);
}
/// <summary>
/// This function calls the OS dialog to prompt user for credential.
/// </summary>
/// <param name="hwdOwner">The parent for the dialog.</param>
/// <param name="targetUri">
/// The credential target. It is displayed in the prompt dialog and is
/// used for credential storage.
/// </param>
/// <param name="isWindowsAuthentication"></param>
/// <param name="realm"></param>
/// <param name="userName">The username supplied by the user.</param>
/// <param name="password">The password supplied by the user.</param>
/// <returns>
/// DialogResult.OK = if Successfully prompted user for credentials.
/// DialogResult.Cancel = if user cancelled the prompt dialog.
/// </returns>
private static DialogResult ShowOSCredentialDialog(IntPtr hwdOwner, Uri targetUri, bool isWindowsAuthentication, string realm, out string userName, out string password)
{
DialogResult retValue = DialogResult.Cancel;
userName = string.Empty;
password = string.Empty;
string titleFormat = "Enter credentials...";
string description = String.Format("Enter a user name and password with access to {0}", targetUri.GetLeftPart(UriPartial.Path));
string target = targetUri.Host;
// Create the CREDUI_INFO structure.
CredUI.CREDUI_INFO info = new CredUI.CREDUI_INFO();
info.pszCaptionText = titleFormat;
info.pszMessageText = description;
info.hwndParentCERParent = hwdOwner;
info.hbmBannerCERHandle = IntPtr.Zero;
info.cbSize = Marshal.SizeOf(info);
// We specify CRED_TYPE_SERVER_CREDENTIAL flag as the stored credentials appear in the
// "Control Panel->Stored Usernames and Password". It is how IE stores and retrieve
// credentials. By using the CRED_TYPE_SERVER_CREDENTIAL flag allows IE and VS to
// share credentials.
// We dont specify the CREDUI_FLAGS_EXPECT_CONFIRMATION as the VS proxy service consumers
// dont call back into the service to confirm that the call succeeded.
CredUI.CREDUI_FLAGS flags = CredUI.CREDUI_FLAGS.SERVER_CREDENTIAL |
CredUI.CREDUI_FLAGS.GENERIC_CREDENTIALS |
CredUI.CREDUI_FLAGS.ALWAYS_SHOW_UI |
CredUI.CREDUI_FLAGS.SHOW_SAVE_CHECK_BOX |
CredUI.CREDUI_FLAGS.EXCLUDE_CERTIFICATES;
if (isWindowsAuthentication)
{
flags |= CredUI.CREDUI_FLAGS.COMPLETE_USERNAME;
}
StringBuilder user = new StringBuilder(Convert.ToInt32(CredUI.CREDUI_MAX_USERNAME_LENGTH));
StringBuilder pwd = new StringBuilder(Convert.ToInt32(CredUI.CREDUI_MAX_PASSWORD_LENGTH));
int saveCredentials = 0;
// Ensures that CredUPPromptForCredentials results in a prompt.
int netError = CredUI.ERROR_LOGON_FAILURE;
// Call the OS API to prompt for credentials.
CredUI.CredUIReturnCodes result = CredUI.CredUIPromptForCredentials(
info,
target,
IntPtr.Zero,
netError,
user,
CredUI.CREDUI_MAX_USERNAME_LENGTH,
pwd,
CredUI.CREDUI_MAX_PASSWORD_LENGTH,
ref saveCredentials,
flags);
if (result == CredUI.CredUIReturnCodes.NO_ERROR)
{
userName = user.ToString();
password = pwd.ToString();
retValue = DialogResult.OK;
}
else
{
Debug.Assert(result == CredUI.CredUIReturnCodes.ERROR_CANCELLED);
retValue = DialogResult.Cancel;
}
return(retValue);
}
