hashsigs 0.0.1

WOTS+ hash-based signatures in Python with optional Rust acceleration

hashsigs (Python)

Python package for WOTS+ with optional Rust acceleration from hashsigs-rs.

Quickstart (recommended)

Create a project-local virtual environment named .hashsigs and run all tests:

# from the repo root
python3 -m venv .hashsigs
source .hashsigs/bin/activate
python -m pip install -U pip pytest pytest-cov

# Ensure Rust toolchain (required to build the optional extension)
# macOS: also ensure Xcode CLT: xcode-select --install
rustup --version || brew install rust
cargo --version

# Install dev deps and try to build rust extension (quote extras in zsh)
pip install -v -e '.[rust,dev]'
# Install keccak provider (required for vectors when falling back to Python)
pip install pycryptodome
# or: pip install pysha3

# Quick check the extension is present (optional)
python -c "import hashsigs._rust as m; print('rust ext ok:', m)"

# Lint + type + tests with coverage; this is the full suite
pytest -q --cov=hashsigs --cov-report=term-missing

If the Rust toolchain is not available, the above will fail on the rust-backed vector tests. See the “Test options” section for alternatives.

Test options

You can choose between three categories:

• All Tests (vectors + rust-backed + lint + type + coverage) — fails if keccak or rust ext are missing

  • pip install -e '.[rust,dev]' && pip install pycryptodome
  • pytest -q

• Basic (pure Python functionality only; requires keccak provider, but no Rust extension)

  • pip install -e '.[dev]' pycryptodome
  • HASHSIGS_BUILD_RUST=0 pytest -q -m "not requires_rust"

• Basic (no keccak) — internal consistency tests only using hashlib.sha3_256; no vectors

  • pip install -e '.[dev]'
  • pytest -q -m "not vectors"

Troubleshooting

• pysha3 build fails on Python 3.13 (macOS) with missing pystrhex.h

  • Symptom: fatal error: 'pystrhex.h' file not found when building _pysha3
  • Fix: install pycryptodome instead (preferred). Example: pip install pycryptodome
  • Alternative: use Python 3.11/3.12 where pysha3 wheels may exist, or wait for pysha3 to add 3.13 support

• Rust extension won’t build/import

  • Ensure Rust toolchain is installed: curl https://sh.rustup.rs -sSf | sh (or brew install rust)
  • On macOS, ensure Xcode Command Line Tools are installed: xcode-select --install
  • Clean and rebuild in your venv:
    • pip uninstall -y hashsigs; pip install -e .[rust,dev]
    • python -c "import hashsigs._rust as m; print('rust ext ok', m)"
  • If it still fails, you can run Basic tests while you investigate: HASHSIGS_BUILD_RUST=0 pytest -q -m "not requires_rust"

Usage example

from hashsigs import WOTSPlus

# Prefer the Rust backend if available; falls back to Python keccak provider if not
wots = WOTSPlus.keccak256(prefer_rust=True)

# Derive a keypair from a 32-byte seed
seed = bytes([1]) * 32
pk, sk = wots.generate_key_pair(seed)

# Sign and verify a 32-byte message
msg = bytes([2]) * 32
sig = wots.sign(sk, msg)
assert wots.verify(pk, msg, sig)
print("Signature verifies!")

Quick self-check (from shell)

Run a one-liner to confirm the package imports, the Rust extension is available (optional), and basic operations work:

python - <<'PY'
from hashsigs import WOTSPlus
try:
    import hashsigs._rust as _
    print('Rust extension: available')
except Exception:
    print('Rust extension: not available (falling back to Python)')

wots = WOTSPlus.keccak256(prefer_rust=True)
seed = bytes([1]) * 32
pk, sk = wots.generate_key_pair(seed)
msg = bytes([2]) * 32
sig = wots.sign(sk, msg)
print('verify:', wots.verify(pk, msg, sig))
PY

Rust backend

We now depend on the public crate and repository:

• Crate: hashsigs-rs = "0.0.2"
• Repo: https://github.com/QuipNetwork/hashsigs-rs

The Python bindings (PyO3) will attempt to build against the published crate during installation. If the build fails, the package still installs and falls back to pure Python.

License

AGPL-3.0-or-later; see COPYING