Some NPK files in SMC cannot be extracted

[itwasperfect]

I'm not good at English, so my sentences may be strange, but I tried to extract the NPK file for the game Super Mecha Champions, but when I tried to read the res.npk file for the PC version of Super Mecha Champions, most of the meshes displayed "Failed to load mesh data from bytes" and could not be read. On the other hand, I was able to read the NPK file for the mobile version, which displayed the file "res_ext_skin_1" and the 3D model, but all of the files in ep_res_1.npk, which is included in the folder ext_patch_npk, displayed "empty" and could not be read. How should I set up composite keys?
I set the Info Size to 32.

[itwasperfect]

It says composite key, but that was my mistake the correct term is Decryption key.

[pholaneckes]

they never accept my merge, but you can try the ver in my repository. it works properly for most SMC meshes.

[YUCLing]

Has the issue been solved by #39 ?

[liali-LH]

Has the issue been solved by #39 ?

#33 可能是相似的问题，使用 35aa6bb 6d427d2 841d967 均未解决
如有需要可提供使用的文件以供测试