/// <summary>
/// Provides the flags that specify how the Windows credential manager handles the credentials.
/// </summary>
private CREDMGMTUI.FLAGS GetFlags()
{
CREDMGMTUI.FLAGS flags = CREDMGMTUI.FLAGS.GENERIC_CREDENTIALS |
CREDMGMTUI.FLAGS.EXPECT_CONFIRMATION |
CREDMGMTUI.FLAGS.EXCLUDE_CERTIFICATES;
return(flags);
}
/// <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));
}
}
