Each cipher module's random() now returns a thread-local Random that is
created on first use and reused thereafter. Each thread gets its own
OS-seeded generator (own key+nonce), so no locking and no cross-thread
nonce collisions. random_key() and random_nonce() draw from this CSPRNG
instead of secrets.token_bytes, making them as fast as the stream.
Changes made in the aegis256x4.py template and regenerated.
StreamStorage wraps any seek-based file-like object using the same
lock + seek/read/write pattern as FileStorage's fallback for platforms
without pread/pwrite. create()/open() auto-wrap io.BytesIO, so in-memory
use no longer requires the explicit BytesIOStorage wrapper. The caller
keeps ownership of the stream (Raf does not close it).
mmap-backed buffer locked against swapping (mlock/VirtualLock) and
excluded from core dumps (MADV_DONTDUMP) where available, wiped on
close. Not used for return values; intended as an 'into' target (and
key input) to keep sensitive material out of the regular heap.
Adapted from quantumpipe's securebuf module.
Implement Python bindings for the libaegis 0.10.6 RAF API:
- Thin per-variant wrappers (raf_create/open/read/write/truncate/size/
sync/close, merkle_rebuild/verify/commitment) generated from a template
in tools/generate.py, with errno-mapped exceptions.
- aeg.raf: high-level file-like API (Raf, create/open/probe,
derive_master_key) with pluggable Storage backends (FileStorage,
BytesIOStorage) and Merkle tree integrity via a MerkleHasher protocol
(SHA256MerkleHasher default), adapted from pyaegis (MIT).
- aeg.random: CSPRNG facility. Random produces AEGIS keystream seeded
once from the OS, exposed per cipher module as cipher.random() and
usable as the RAF RNG (as_raf_rng) or standalone RandomSource.
- Tests: roundtrip/random-access/seek/truncate/Merkle coverage for all
six variants, pyaegis-style API checks, and a Merkle fuzz test.
- Mac class follows hashlib API: digest functions added and finalization no longer modifies state.
- Encryptor and Decryptor now raise RuntimeError if still used after final.
Documentation updated with the changes and further examples.
Tests updated with the changes, new test module for error cases (test_raises).
Docstrings improved.
LeoVasanko