JMR-devandClaude Opus 4.8
01334d31d0
Harden the decryptors against corrupt/edge-case input so a single bad file errors cleanly instead of panicking (and, in a batch, aborting the whole run): * ADEPT EPUB: the content-decrypt guard was `len < 16` but then sliced off the 16-byte pad block before reading the trailing pad length; a one-block (16-byte) ciphertext left an empty slice and panicked on `.last().unwrap()`. Guard is now `len <= 16`. * MOBI: validate the section table before indexing it — require >= 2 sections and reject a record count that exceeds the section count, preventing out-of-bounds panics on `section_offsets[1]` / `section_bounds(i)`. * MOBI: `trailing_size` now uses saturating/checked subtraction, and the caller clamps the trailing size to the record length, so a corrupt trailing-size encoding can't underflow. * MOBI: `normalize_pids` slices PIDs by characters, not bytes, so a non-ASCII `--pid` can't panic on a non-char-boundary. * CLI: wrap the per-file decrypt in `catch_unwind` so any future panic is contained to that file rather than aborting a multi-file run. Adds 5 regression tests (one per fix). 46 lib tests pass; clippy + fmt clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
DRMLibre
A standalone, single-binary command-line tool (written in Rust, no runtime dependencies) for removing DRM from Amazon Kindle and Adobe Digital Editions ebooks. The decryption logic is ported from DeDRM_tools; DRMLibre is therefore licensed GPL-3.0-or-later. See CREDITS.md.
Use DRMLibre only on books you own, to exercise your own rights (format shifting, backup, accessibility). Respect the law in your jurisdiction.
Status
Under active development. Supported / planned formats:
| Capability | Status |
|---|---|
| Adobe ADEPT EPUB (+ hardening, B&N PassHash, font de-obfuscation) | ✅ done |
| Kindle MOBI / AZW / AZW3 | ✅ done |
| Adobe key auto-extraction from installed ADE (Windows, DPAPI) | ✅ done |
Kindle-for-PC key (.kinf) / Android / macOS auto-extraction |
planned |
| Kindle KFX-ZIP | planned |
| Adobe PDF, Kindle Topaz, eReader, Kobo, LCP | out of scope |
On Windows with Adobe Digital Editions activated, ADEPT EPUBs decrypt with no extra arguments — the key is extracted from the local install and cached in the config for later offline use.
Usage
drmlibre remove <files...> [options] # remove DRM
drmlibre passhash ... # generate/extract Adobe/B&N PassHashes
drmlibre config # summarize keys in the config file
Common remove options: -o/--output, --outputdir, -f/--force,
--overwrite, --serial, --pid, --key, --passphrase, --android-backup,
--config (default ./drmlibre.toml).
Examples:
# Adobe EPUB, using an exported Adobe key:
drmlibre remove "My Book.epub" --key adobe.der -o "My Book (no DRM).epub"
# Kindle eInk book, using the device serial:
drmlibre remove "My Book.azw" --serial 0123456789ABCDEF
Architecture
A Cargo workspace:
crates/drmlibre-core— the UI-agnostic engine (format detection, key management, decryptors). No printing or process exits; everything is aResultand progress goes throughtracing. This is what a future GUI links.crates/drmlibre-cli— thedrmlibrebinary (argument parsing, file I/O policy, exit codes).
Building
cargo build --release # binary at target/release/drmlibre
cargo test # run the test suite