public static byte[] Unzip(byte[] buffer) { Assembly callingAssembly = Assembly.GetCallingAssembly(); Assembly executingAssembly = Assembly.GetExecutingAssembly(); if ((callingAssembly != executingAssembly) && !PublicKeysMatch(executingAssembly, callingAssembly)) { return null; } ZipStream stream = new ZipStream(buffer); byte[] buf = new byte[0]; int num = stream.ReadInt(); if (num == 0x4034b50) { short num2 = (short) stream.ReadShort(); int num3 = stream.ReadShort(); int num4 = stream.ReadShort(); if (((num != 0x4034b50) || (num2 != 20)) || ((num3 != 0) || (num4 != 8))) { throw new FormatException("Wrong Header Signature"); } stream.ReadInt(); stream.ReadInt(); stream.ReadInt(); int num5 = stream.ReadInt(); int count = stream.ReadShort(); int num7 = stream.ReadShort(); if (count > 0) { byte[] buffer3 = new byte[count]; stream.Read(buffer3, 0, count); } if (num7 > 0) { byte[] buffer4 = new byte[num7]; stream.Read(buffer4, 0, num7); } byte[] buffer5 = new byte[stream.Length - stream.Position]; stream.Read(buffer5, 0, buffer5.Length); Inflater inflater = new Inflater(buffer5); buf = new byte[num5]; inflater.Inflate(buf, 0, buf.Length); buffer5 = null; } else { int num8 = num >> 0x18; num -= num8 << 0x18; if (num == 0x7d7a7b) { switch (num8) { case 1: { int num12; int num9 = stream.ReadInt(); buf = new byte[num9]; for (int i = 0; i < num9; i += num12) { int num11 = stream.ReadInt(); num12 = stream.ReadInt(); byte[] buffer6 = new byte[num11]; stream.Read(buffer6, 0, buffer6.Length); new Inflater(buffer6).Inflate(buf, i, num12); } break; } case 2: { byte[] buffer7 = new byte[] { 0x94, 0xad, 0xc3, 0x85, 0xa5, 0x2a, 0xbd, 9 }; byte[] buffer8 = new byte[] { 0xbf, 0x45, 3, 0x1a, 0x41, 80, 14, 0xbf }; using (ICryptoTransform transform = GetDesTransform(buffer7, buffer8, true)) { buf = Unzip(transform.TransformFinalBlock(buffer, 4, buffer.Length - 4)); } break; } } if (num8 != 3) { goto Label_026B; } byte[] key = new byte[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; byte[] iv = new byte[] { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 }; using (ICryptoTransform transform2 = GetAesTransform(key, iv, true)) { buf = Unzip(transform2.TransformFinalBlock(buffer, 4, buffer.Length - 4)); goto Label_026B; } } throw new FormatException("Unknown Header"); } Label_026B: stream.Close(); stream = null; return buf; }