/// <summary> Seperates the salt from the data provided </summary>
public SaltedData(byte[] saltedData, Salt.Size szSalt)
{
byte[] salt = Check.ArraySize(new byte[(int)szSalt / 8], 8, 64);
Array.Copy(saltedData, 0, salt, 0, salt.Length);
_salt = new Salt(salt, false);
_data = new byte[saltedData.Length - salt.Length];
Array.Copy(saltedData, salt.Length, _data, 0, _data.Length);
}
/// <summary> Decrypts the bytes with the current password and salt </summary>
public byte[] Decrypt(byte[] blob, Salt.Size szSaltSize)
{
try
{
using (SaltedData data = new SaltedData(blob, szSaltSize))
using (AESCryptoKey key = CreateKey(data.Salt))
return(key.Decrypt(data.GetDataBytes()));
}
catch (InvalidOperationException) { throw; }
catch { throw CryptographicException(); }
}
/// <summary> Decrypts the stream with the current password and salt </summary>
public Stream Decrypt(Stream stream, Salt.Size szSaltSize)
{
try
{
Salt salt = new Salt(IOStream.Read(stream, (int)szSaltSize / 8), false);
AESCryptoKey key = CreateKey(salt);
return(new DisposingStream(key.Decrypt(stream))
.WithDisposeOf(key));
}
catch (InvalidOperationException) { throw; }
catch { throw CryptographicException(); }
}