private void Save(CodeSnippetCollection collection, string fileName)
{
SecureString usbKeyPW = null;
SecureString _pw = null;
FileEncyptionMode _encryptmode = FileEncyptionMode.DefaultEncryption;
if (!string.IsNullOrEmpty(_passwordHelper.UsbKeyId))
{
bool _canceled = false;
byte[] _key = _passwordHelper.GetUsbKey(_passwordHelper.UsbKeyId, false, out _canceled);
if (_canceled)
{
return;
}
usbKeyPW = StringCipher.ToSecureString(Utils.ByteArrayToString(_key));
}
if (_passwordHelper.Password != null)
{
_pw = _passwordHelper.Password;
_encryptmode = FileEncyptionMode.PasswordEncryption;
}
if (usbKeyPW != null)
{
_pw = usbKeyPW;
_encryptmode = FileEncyptionMode.UsbKEYEncryption;
}
EncryptedBinaryFile <CodeSnippetCollection, FileHeader> _writer = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(fileName, _pw);
FileHeader _header = new FileHeader()
{
Version = Config.CurrentVersion().ToString(), FileEncyptionMode = _encryptmode, UsbKeyId = _passwordHelper.UsbKeyId
};
try
{
_writer.Save(_header, collection);
CodeLib.Instance.Changed = false;
}
catch (UnauthorizedAccessException)
{
MessageBox.Show(_mainform, $"Access to file '{fileName}' denied!.", "File error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
catch (Exception)
{
return;
}
}
public CodeSnippetCollection ReadCollection(string filename, out FileReadResult readResult)
{
SecureString password = _passwordHelper.Password;
string usbKeyId = null;
readResult = FileReadResult.Succes;
string _fileData = string.Empty;
SecureString _usbKeyPassword = null;
VersionNumber _minimalVersion = new VersionNumber(3, 0, 0, 0);
CodeSnippetCollection _resultCollection = new CodeSnippetCollection();
FileHeader _header = null;
try
{
EncryptedBinaryFile <CodeSnippetCollection, FileHeader> _readHeader = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(filename, null);
_header = _readHeader.ReadHeader();
if (!_header.Identifier.Equals(Constants.FILEHEADERIDENTIFIER))
{
readResult = FileReadResult.ErrorUnknownIdentifier;
return(null);
}
VersionNumber _fileVersion = new VersionNumber(_header.Version);
if (_fileVersion < _minimalVersion)
{
readResult = FileReadResult.ErrorVersionToOld;
return(null);
}
}
catch
{
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
EncryptedBinaryFile <CodeSnippetCollection, FileHeader> _reader = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(filename, null);
switch (_header.FileEncyptionMode)
{
case FileEncyptionMode.DefaultEncryption:
_reader = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(filename, null);
try
{
_passwordHelper.ClearPassWord();
_resultCollection = _reader.Read();
return(_resultCollection); // SUCCES
}
catch
{
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
case FileEncyptionMode.PasswordEncryption:
retryPassword:
_reader = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(filename, password);
try
{
_resultCollection = _reader.Read();
_passwordHelper.Password = password;
_passwordHelper.UsbKeyId = null;
_passwordHelper.ShowKey();
return(_resultCollection); // SUCCES
}
catch (FileLoadException)
{
_passwordHelper.ClearPassWord();
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
catch (FileNotFoundException)
{
_passwordHelper.ClearPassWord();
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
catch (Exception)
{
goto setPassword;
}
setPassword:
FormSetPassword _formSet = new FormSetPassword();
DialogResult _dg = _formSet.ShowDialog();
if (_dg == DialogResult.OK)
{
password = _formSet.Password;
goto retryPassword;
}
else
{
readResult = FileReadResult.OpenCanceled;
return(null);
}
case FileEncyptionMode.UsbKEYEncryption:
bool _canceled;
usbKeyId = _header.UsbKeyId;
byte[] _key = _passwordHelper.GetUsbKey(_header.UsbKeyId, false, out _canceled);
if (_canceled)
{
readResult = FileReadResult.OpenCanceled;
return(null);
}
_usbKeyPassword = StringCipher.ToSecureString(Utils.ByteArrayToString(_key));
_reader = new EncryptedBinaryFile <CodeSnippetCollection, FileHeader>(filename, _usbKeyPassword);
try
{
_resultCollection = _reader.Read();
_passwordHelper.Password = null;
_passwordHelper.UsbKeyId = _header.UsbKeyId;
_passwordHelper.ShowKey();
return(_resultCollection); // SUCCES
}
catch
{
_passwordHelper.ClearPassWord();
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
}
_passwordHelper.ClearPassWord();
readResult = FileReadResult.ErrorReadingFile;
return(null);
}
