/// <summary>
/// Helper method for getting Open and Modify passwords, and checking that they are valid
/// </summary>
protected DecryptResult GetAndCheckPasswords(IContentEncryptionUi ui)
{
if ((RequiresOpenPassword && string.IsNullOrEmpty(OpenPassword)) || (RequiresModifyPassword && String.IsNullOrEmpty(ModifyPassword)))
{
// Check if there are admin-defined default passwords
string defaultOpenPassword = string.Empty;
string defaultModifyPassword = string.Empty;
if (this.AllowDefaultPassword)
{
defaultOpenPassword = GetDefaultOpenPassword();
defaultModifyPassword = GetDefaultModifyPassword();
}
// If no passwords, then show the UI and allow the user to enter them.
if (string.IsNullOrEmpty(defaultOpenPassword) && string.IsNullOrEmpty(defaultModifyPassword))
{
string pwdOpen= ShortTermPasswordCache.Instance.TryGetPassword(m_Attachment, "Open");
string pwdModify = ShortTermPasswordCache.Instance.TryGetPassword(m_Attachment, "Modify");
string pwdDescription = string.Format(Resources.OpenPasswordRequired, DisplayShortName);
if (pwdOpen == null && pwdModify == null)
{
DecryptResult result = ui.GetPasswords(Name, DisplayShortName, out pwdOpen, out pwdModify);
if (result != DecryptResult.Ok)
{
return result;
}
if (string.IsNullOrEmpty(pwdOpen) && String.IsNullOrEmpty(pwdModify))
{
throw new UnauthorizedAccessException("Password required");
}
}
OpenPassword = pwdOpen;
ModifyPassword = pwdModify;
ShortTermPasswordCache.Instance.AddPassword(m_Attachment, "Open", pwdOpen);
ShortTermPasswordCache.Instance.AddPassword(m_Attachment, "Modify", pwdModify);
}
else
{
OpenPassword = defaultOpenPassword;
ModifyPassword = defaultModifyPassword;
}
}
return DecryptResult.Ok;
}
private DecryptResult UnProtect(object doc, IContentEncryptionUi ui)
{
InitPasswordsList(doc);
if (m_Passwords.Count > 0)
return ui.GetPasswords(OriginalAttachment.Name, OriginalAttachment.Name, m_Passwords, OnPropertyChanged);
return DecryptResult.Ok;
}