Shared cryptographic primitives for the Flamberge tool suite.
Two ciphers here are bespoke to the ebook-DRM world and are implemented from scratch (they exist in no crate): the PC1 / Pukall stream cipher used by Mobipocket, and the Topaz stream cipher. Everything else (AES, DES, RC4, digests, PBKDF2) is a thin wrapper over standard implementations.
See docs/DEDRM_SCHEMES.md §1 for the reference specification.