/// <summary>
/// Encrypt with password
/// </summary>
/// <param name="input">Input stream</param>
/// <param name="output">Output stream</param>
/// <param name="password">Password</param>
/// <param name="notifyProgression">Notify progression method</param>
public static void EncryptWithPassword(Stream input, Stream output, string password, Action <int> notifyProgression = null)
{
byte[] salt = RandomHelper.GenerateBytes(16);
byte[] key = PBKDF2.GenerateKeyFromPassword(AES.KEY_SIZE, password, salt);
byte[] iv = RandomHelper.GenerateBytes(AES.IV_SIZE);
BinaryHelper.WriteString(output, "ENCP!", Encoding.ASCII);
BinaryHelper.WriteByte(output, _version);
BinaryHelper.WriteByte(output, (byte)iv.Length);
BinaryHelper.WriteByte(output, (byte)salt.Length);
BinaryHelper.WriteBytes(output, iv);
BinaryHelper.WriteBytes(output, salt);
AES.EncryptCBC(input, output, key, iv, _paddingStyle, notifyProgression);
}
/// <summary>
/// Decrypt with password
/// </summary>
/// <param name="input">Input stream</param>
/// <param name="output">Output stream</param>
/// <param name="password">Password</param>
/// <param name="notifyProgression">Notify progression method</param>
public static void DecryptWithPassword(Stream input, Stream output, string password, Action <int> notifyProgression = null)
{
input.Seek(5, SeekOrigin.Current); // Header
input.Seek(1, SeekOrigin.Current); // Version
byte ivLength = BinaryHelper.ReadByte(input);
byte saltLength = BinaryHelper.ReadByte(input);
byte[] iv = BinaryHelper.ReadBytes(input, ivLength);
byte[] salt = BinaryHelper.ReadBytes(input, saltLength);
if (notifyProgression != null)
{
notifyProgression(5 + 1 + 1 + 1 + ivLength + saltLength);
}
byte[] key = PBKDF2.GenerateKeyFromPassword(AES.KEY_SIZE, password, salt);
AES.DecryptCBC(input, output, key, iv, _paddingStyle, notifyProgression);
}
