/// <summary>
/// Calls the CredUIConfirmCredentials function which confirms that the credentials
/// provided for the target should be kept in the case they are persisted.</summary>
/// <param name="value">A value of true if the credentials should be persisted.</param>
public void Confirm(bool value)
{
switch (CREDMGMTUI.ConfirmCredentials(this.Target, value))
{
case CREDMGMTUI.ReturnCodes.NO_ERROR:
break;
case CREDMGMTUI.ReturnCodes.ERROR_INVALID_PARAMETER:
break;
default:
throw new ApplicationException("Credential confirmation failed.");
}
}
/// <summary>
/// Calls the CredUICmdLinePromptForCredentials function that will either prompt for
/// credentials or get the stored credentials for the specified target.
/// </summary>
/// <returns>The DialogResult that indicates the results of using CredUI.</returns>
/// <remarks>
/// Sets the user name, password and persistence state of the dialog.
/// </remarks>
internal DialogResult ShowPrompt()
{
StringBuilder name = new StringBuilder(CREDMGMTUI.MAX_USERNAME_LENGTH);
StringBuilder pwd = new StringBuilder(CREDMGMTUI.MAX_PASSWORD_LENGTH);
int saveChecked = Convert.ToInt32(this.SaveChecked);
CREDMGMTUI.FLAGS flags = GetFlags();
Console.WriteLine("Enter your Exchange Online user principal name for the Exchange Web Services stored credential ([email protected])...");
lock (this)
{
// Call CredUi.dll to prompt for credentials. If the credentials for the target have already
// been saved in the credential manager, then this method will return the credentials
// and the UI will not be displayed.
CREDMGMTUI.ReturnCodes code = CREDMGMTUI.CredUICmdLinePromptForCredentials(
this.Target,
IntPtr.Zero, 0,
name, CREDMGMTUI.MAX_USERNAME_LENGTH,
pwd, CREDMGMTUI.MAX_PASSWORD_LENGTH,
ref saveChecked,
flags
);
// Convert the password returned by the credential manager to a secure string.
this.Password = ConvertToSecureString(pwd);
// Get the user name stored in the credential manager.
this.Name = name.ToString();
// Get the value that indicates whether the credentials are persisted
// in the credential manager.
this.SaveChecked = Convert.ToBoolean(saveChecked);
return(GetCredPromptResult(code));
}
}
/// <summary>
/// Returns a DialogResult based on the code returned by the credential manager.
/// </summary>
/// <param name="code">The credential return code provided by the credential manager.</param>
private DialogResult GetCredPromptResult(CREDMGMTUI.ReturnCodes code)
{
DialogResult result;
switch (code)
{
case CREDMGMTUI.ReturnCodes.NO_ERROR:
result = DialogResult.OK;
break;
case CREDMGMTUI.ReturnCodes.ERROR_CANCELLED:
result = DialogResult.Cancel;
break;
case CREDMGMTUI.ReturnCodes.ERROR_NO_SUCH_LOGON_SESSION:
throw new ApplicationException("The credential manager cannot be used.");
case CREDMGMTUI.ReturnCodes.ERROR_INVALID_PARAMETER:
throw new ApplicationException(@"Invalid parameter. See http://msdn.microsoft.com/en-us/library/windows/desktop/aa375177(v=vs.85).aspx");
case CREDMGMTUI.ReturnCodes.ERROR_INVALID_FLAGS:
throw new ApplicationException("Invalid flags.");
default:
throw new ApplicationException("The credential manager returned an unknown return code.");
}
return result;
}
