libjcat

Library for reading and writing JSON catalog files

This library allows reading and writing gzip-compressed JSON catalog files, which can be used to store GPG, PKCS-7 and SHA-256 checksums for each file. It provides equivalent functionality to the catalog files supported in Microsoft Windows. Unlike Microsoft catalog files which are a signed manifest of hashes, a Jcat file is a manifest of signatures. This means it's possible (and positively encouraged) to modify the .jcat file to add new signatures or replace existing ones.