public bool Write(Database database, StreamWriter stream, bool encrypt = true)
{
// Clear the last error
this.ErrorString = string.Empty;
XmlDocument document = new XmlDocument();
this.Append(document, document, database);
StringWriter sw = new StringWriter();
XmlTextWriter xw = new XmlTextWriter(sw);
xw.Formatting = Formatting.Indented;
xw.Indentation = 4;
document.WriteTo(xw);
string fileDataString = sw.ToString();
if (encrypt)
{
DatabaseCrypto.CryptoStatus status;
fileDataString = DatabaseCrypto.Encrypt(fileDataString, database.Password, database.Compression, out status);
if (status != DatabaseCrypto.CryptoStatus.NoError)
{
this.ErrorString = DatabaseCrypto.StatusMessage(status);
return false;
}
}
stream.Write(fileDataString);
return true;
}
public Database Read(StreamReader stream, string password)
{
// Clear the last error
this.ErrorString = string.Empty;
// Check if the stream is unreadable
if (!stream.EndOfStream)
{
this.ErrorString = "Stream was not readable.";
return null;
}
// Get the contents of the database file and create a new XML document
string fileDataString = stream.ReadToEnd();
XmlDocument doc = new XmlDocument();
// Try and see if it's a valid XML document; if it is, we'll simply continue on and read
// it (unencrypted mode), if it's not, we'll try to decrypt it (encrypted mode)
try
{
doc.LoadXml(fileDataString);
DatabaseCrypto.CryptoStatus status;
fileDataString = DatabaseCrypto.Decrypt(fileDataString, password, out status);
if (status != DatabaseCrypto.CryptoStatus.NoError)
{
this.ErrorString = DatabaseCrypto.StatusMessage(status);
return null;
}
}
catch (XmlException)
{
}
try
{
doc.LoadXml(fileDataString);
XmlElement root = doc.DocumentElement;
if (root.Name != DatabaseKeys.XML_DATABASE)
{
this.ErrorString = "Missing root XML element.";
return null;
}
Version version = new Version(root.Attributes[DatabaseKeys.XML_VERSION].Value);
if (version != Database.Version)
{
this.ErrorString = string.Format(CultureInfo.InvariantCulture, "Unsupported database version: {0}", version);
return null;
}
Database db = new Database();
db.FromXml(root);
// Recursively read in all the groups and their subnodes
this.ReadGroup(db, root);
return db;
}
catch (XmlException)
{
this.ErrorString = "Unable to parse the XML tree.";
return null;
}
}
