LCP 2.0 support

[kam59kam]

Hi,
I did all you recommendations and when I try to decrypt a book I receive the next error:
error decrypting file: error getting content key: error decrypting key check: invalid padding length 87 (data length is 48)

[abustany]

Hi,
if you get that error using the latest version (eg the web hosted one), then we probably have a bug in the decrypting logic... If you want, you can forward me the file + your user key by email (look at any of the commits to get my email address), and I'll take a look when time allows.

[filchef]

I use online version without suggest - give me error
can I post to you also files and user key
I download file from there
https://www.ozone.bg/product/mezhdupanelni-voyni-e-kniga/
https://www.ozone.bg/product/supa-v-kotkata-e-kniga/
I have 2 books and can email Thorium book folder for reverse engineering

[abustany]

Thanks for sending the files over. I checked both, and they're indeed encrypted using LCP-2.0, whereas the bookstore I usually use still is on 1.0. I renamed this issue accordingly, and will try to add LCP-2.0 support, though no promises on when this might be ready.

[filchef]

I send to you files and key but forget send to you licensed files so I attach it there

Licenzed.zip

[filchef]

May be this blog and method can help you to solve problem https://shkspr.mobi/blog/2025/03/towards-extracting-content-from-an-lcp-protected-epub/
I am not programmer and just simple user and can I do it my self