public PasswordSequenceConfiguration LoadFromFile(string path)
{
if (path == null || path == string.Empty)
{
throw new Exception("path must be a valid file path");
}
PasswordSequenceConfiguration config = null;
try
{
if (File.Exists(path))
{
using (FileStream configStream = File.OpenRead(path))
{
config = LoadFromStream(configStream);
}
}
else
{
/* Config file not found; create empty config */
config = new PasswordSequenceConfiguration(true);
/* TODO: pop up an error message or something? */
}
}
catch (InvalidOperationException)
{
config = null;
}
return(config);
}
public string GenerateSequence(PasswordSequenceConfiguration globalConfiguration,
CryptoRandomRange cryptoRandom)
{
if (globalConfiguration == null)
{
return(string.Empty);
}
string targetSequence = string.Empty;
foreach (SequenceItem sequenceItem in globalConfiguration.Sequence)
{
targetSequence += new ItemGenerator.ItemGenerator(globalConfiguration)
.Generate(sequenceItem, cryptoRandom);
}
return(targetSequence);
}
public void Save(PasswordSequenceConfiguration configuration)
{
if (Sequencer.GetAdvancedOptionRequired(configuration) && Sequencer.AdvancedOptionsDialog("Configuring password sequence using the advanced mode can result in the password being weaker that what is displaied by the strength bar. " +
"Click Ok if you want to save the sequence anyway.") == System.Windows.Forms.DialogResult.Cancel)
{
return;
}
/* pass "true" to GetConfigurationPath to default to the user config
* even when it doesn't exist yet; we'll create it here
*/
PasswordSequenceConfigurationFactory factory = new PasswordSequenceConfigurationFactory();
string configFile = factory.GetUserFilePath(configuration.Name);
if (null != configFile)
{
XmlSerializer serializer =
new XmlSerializer(typeof(PasswordSequenceConfiguration),
"http://quasivirtuel.com/PasswordSequenceConfiguration.xsd");
/* create the config file's directory if needed */
Directory.CreateDirectory(Path.GetDirectoryName(configFile));
/* open the file for writing, creating a new one if needed */
FileStream configStream = File.Open(configFile, FileMode.Create);
try
{
serializer.Serialize(configStream, configuration);
}
finally
{
configStream.Close();
}
}
/* TODO: should we pop up an error message or something in the
* "else" case (i.e. when getting config file path fails)?
*/
}
internal static bool GetAdvancedOptionRequired(PasswordSequenceConfiguration configuration)
{
bool usesAdvancedOptions = false;
foreach (SequenceItem item in configuration.Sequence)
{
WordSequenceItem word = item as WordSequenceItem;
if (word != null)
{
usesAdvancedOptions = word.Probability < PercentEnum.Always;
}
CharacterSequenceItem characters = item as CharacterSequenceItem;
if (characters != null)
{
usesAdvancedOptions = characters.Probability < PercentEnum.Always || characters.LengthStrength < StrengthEnum.Full;
}
if (usesAdvancedOptions)
{
break;
}
}
return(usesAdvancedOptions);
}
public ItemGenerator(PasswordSequenceConfiguration globalConfiguration)
{
_globalConfiguration = globalConfiguration;
}
public override ProtectedString Generate(PwProfile prf, CryptoRandomStream crsRandomSource)
{
PasswordSequenceConfiguration config = Load(prf.CustomAlgorithmOptions);
return(new ProtectedString(true, GenerateSequence(config, new CryptoRandomRange(crsRandomSource))));
}
public SubstitutionsVisitor(PasswordSequenceConfiguration globalConfiguration)
{
_globalConfiguration = globalConfiguration;
}
