Disabling Recipe Items

There's a possible chance though we may *never* be able to use this, I'm pretty good at what I do but CRC bypass is a little advanced for me


Than you noticed a lot of the items in there don't even list the full recipe it costs to make the item, so I'm wondering if they even use this file, or if it's just a checksum file

You make it sound so easy...

All archives are obfuscated with atleast one pass of the Xor cipher, with the source position as the file position of the block. The file names and data in the Local File Header, and the file name in the Central Directory Header are obfuscated.
The key is constant, but encrypted in game files, available in the tool "VZipFlip" as XorTruths.bin
If the Second-pass checksum in the End of Central Directory Header exists, then a second pass of the Xor Cipher is performed with the 32-bit key: EndOfCentralDirectory.CentralDirectorySize * EndOfCentralDirectory.OffsetOfCentralDirectory.

[edit] Notes and Comments

The game is also called "Mabinogi Heroes"
The game should be considered Episode 1 of the Source engine as far as file formats used.
It is not known how the Second-pass checksum is created, or what the value is. The most likely candidate is CRC-32, perhaps XORed with a key.
The file name of the HFS is likely a 160-bit hash, likely SHA-1, perhaps of the path.
Some files have the extension ".comp". The file data will have a "COMP" header. The data is compressed with DEFLATE (RFC 1951

You can edit the text file all you want but once you convert it back to an hfs file it will lose its secondary key

The easiest way would to bypass the check in engine.dll, but considering engine.dll is also packed good luck with that. Assuming you can find it, it is probably one line of code that just would need to be redirected or null

It was already said above but

763FD8F12D3D013194261D98B4AEF0FB0F6FBA1B.hfs