/// <summary>
/// Loads a security profile with the specified options
/// </summary>
/// <param name="source">A reader for a profile file source. If null, the default profile is loaded</param>
/// <param name="options">The optional flags for the profile</param>
/// <returns>A dictionary containing the security profile</returns>
/// <exception cref="ArgumentException">A regular expression parsing error occurred</exception>
/// <exception cref="IOException">An I/O error occurs</exception>
/// <exception cref="ObjectDisposedException">The TextReader is closed</exception>
public static SecurityProfile LoadProfile(TextReader source, SecurityProfileOptions options)
{
var profile = new SecurityProfile();
if (source == null)
{
source = new StringReader(DefaultProfile);
}
string line;
while ((line = source.ReadLine()) != null)
{
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
var parts = line.Trim().Split(';');
if (parts.Length == 0)
{
continue;
}
var tag = new Regex(parts[0], RegexOptions.IgnoreCase | RegexOptions.Singleline);
var empty = default(char).ToString();
for (var i = 0; i < OptionsCount; i++)
{
var flag = (SecurityProfileOptions)(1 << i);
if ((options & flag) == flag)
{
var action = parts[i + 1].ToCharArray().FirstOrDefault().ToString();
if (action != empty)
{
profile[tag] =
(SecurityProfileActions)Enum.Parse(typeof(SecurityProfileActions), action);
}
}
}
}
return(profile);
}
/// <summary>
/// Return the tag and the appropriate action based on the security profile
/// </summary>
/// <param name="item">A valid confidentiality profile line</param>
/// <param name="options">The security profile options</param>
/// <returns></returns>
private Tuple <string, AnonFunc> parseProfileItem(string item, SecurityProfileOptions options)
{
SecurityProfileActions?action = null;
var parts = item.Split(';');
var tag = parts[0];
for (var i = 0; i < _optionsCount; i++)
{
var flag = (SecurityProfileOptions)(1 << i);
if ((options & flag) == flag)
{
var a = parts[i + 1].ToCharArray().FirstOrDefault().ToString();
if (a != default(char).ToString())
{
action = (SecurityProfileActions)Enum.Parse(typeof(SecurityProfileActions), a);
}
}
}
switch (action.Value)
{
case SecurityProfileActions.U: // UID
return(Tuple.Create <string, AnonFunc>(tag, ReplaceUID));
case SecurityProfileActions.C: // Clean
case SecurityProfileActions.D: // Dummy
return(Tuple.Create <string, AnonFunc>(tag, CleanDummyElement));
case SecurityProfileActions.K: // Keep
return(Tuple.Create <string, AnonFunc>(tag, KeepItem));
case SecurityProfileActions.X: // Remove
return(Tuple.Create <string, AnonFunc>(tag, RemoveItem));
case SecurityProfileActions.Z: // Zero-length
return(Tuple.Create <string, AnonFunc>(tag, BlankElement));
default:
throw new ArgumentOutOfRangeException($"Unrecognized action: {action.Value}");
}
}
public ConfidentialityProfile(SecurityProfileOptions ops)
{
_options = ops;
}
