public static void WriteArchive(List <Entry> entries, byte[] MasterKey)
{
byte[] IV = CryptoFunctions.GenerateCryptoSecureBytes(Settings.AES.IVBytes);
byte[] Salt = CryptoFunctions.GenerateCryptoSecureBytes(Settings.AES.SaltBytes);
byte[] Key = CryptoFunctions.DeriveKey(MasterKey, Salt, Settings.AES.KeyBytes, Settings.AES.AESPBKDF2Iterations);
SingleUseAESKey singleUseKey = new SingleUseAESKey(Key, Salt, IV);
Stream FileOutputStream = new FileStream(Settings.Files.ArchivePath, (FileMode)FileAccess.Write);
Stream AESStream = Crypto.AESStream.CreateEncryptionStream(FileOutputStream, singleUseKey);
EncodingStream EncoderStream = new EncodingStream(AESStream);
FileOutputStream.Write(IV, 0, IV.Length);
FileOutputStream.Write(Salt, 0, Salt.Length);
EncoderStream.WriteHeader(entries.Count);
foreach (Entry e in entries)
{
EncoderStream.WriteString(e.Title);
EncoderStream.WriteString(e.Text);
EncoderStream.WriteString(e.LastChange.ToString());
}
EncoderStream.Close();
AESStream.Close();
FileOutputStream.Close();
}
public static List <Entry> ReadArchive(byte[] MasterKey)
{
Stream FileInputStream = File.OpenRead(Settings.Files.ArchivePath);
byte[] IV = new byte[Settings.AES.IVBytes];
byte[] Salt = new byte[Settings.AES.SaltBytes];
FileInputStream.Read(IV, 0, IV.Length);
FileInputStream.Read(Salt, 0, Salt.Length);
byte[] Key = CryptoFunctions.DeriveKey(MasterKey, Salt, Settings.AES.KeyBytes, Settings.AES.AESPBKDF2Iterations);
SingleUseAESKey singleUseKey = new SingleUseAESKey(Key, Salt, IV);
Stream AESStream = Crypto.AESStream.CreateDecryptionStream(FileInputStream, singleUseKey);
EncodingStream DecoderStream = new EncodingStream(AESStream);
int EntriesCount = DecoderStream.ReadHeader();
List <Entry> Entries = new List <Entry>(EntriesCount);
for (int i = 0; i < EntriesCount; i++)
{
string Title = DecoderStream.ReadNextString();
string Text = DecoderStream.ReadNextString();
DateTime LastChange = Convert.ToDateTime(DecoderStream.ReadNextString());
Entries.Add(new Entry(Title, Text, LastChange));
}
DecoderStream.Close();
AESStream.Close();
FileInputStream.Close();
return(Entries);
}
