public static void ApplyEncryption(FilterBase filterBase, byte[] key, string parameter = "")
{
IEnumerable <string> types;
if (parameter.IsNullOrEmpty())
{
types = new[] { EncryptionAesOfb128 }
}
;
else
{
types = parameter.Split(',').Select(x => x.Trim());
}
foreach (var type in types)
{
if (string.IsNullOrEmpty(type))
{
continue;
}
switch (type)
{
case EncryptionAesOfb128:
if (key.Length > 16)
{
key = key.Take(16).ToArray();
}
filterBase.ApplyAesStreamFilter(key);
break;
case EncryptionChacha20Ietf:
if (key.Length > 32)
{
key = key.Take(32).ToArray();
}
filterBase.ApplyFilterFromEncryptor(ChaCha20IetfEncryptor.Create, key);
break;
case EncryptionSpeck0:
filterBase.ApplyFilterFromEncryptor(Speck.Ctr128128.Create, key);
break;
case EncryptionSpeck064:
filterBase.ApplyFilterFromEncryptor(Speck.Ctr64128.Create, key);
break;
case CompressionLz4_0:
filterBase.ApplyFilterFromFilterCreator(LZ4pn.LZ4Filter.GetFilter);
break;
case HashCrc32c:
Crc32c.AddToFilterBase(filterBase, 0);
break;
case EncryptionNone:
// no encryption
break;
default:
throw new Exception($"unknown encryption '{type}'");
}
}
}