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- using SevenZip;
- using SevenZip.Compression.LZMA;
- using System.IO;
- namespace LuaDecrypter
- {
- internal class Decrypter
- {
- public const int JUNK_SIZE = 4;
- public const int PROPERTIES_SIZE = 5;
- public bool Decrypt(Stream inStream, Stream outStream, bool removeJunk = false, int junkSize = 4)
- {
- if (removeJunk)
- inStream.Seek((long) junkSize, SeekOrigin.Begin);
- byte[] numArray = new byte[5];
- if (inStream.Read(numArray, 0, 5) != 5)
- return false;
- Decoder decoder = new Decoder();
- decoder.SetDecoderProperties(numArray);
- long outSize = 0L;
- for (int index = 0; index < 8; ++index)
- {
- int num = inStream.ReadByte();
- if (num < 0)
- return false;
- outSize |= (long) (byte) num << 8 * index;
- }
- long inSize = inStream.Length - inStream.Position;
- decoder.Code(inStream, outStream, inSize, outSize, (ICodeProgress) null);
- return true;
- }
- }
- }
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