pkcs11-check 0.1.4

CLI-first PKCS#11 test suite with segfault survival, interface forcing, and pytest plugin

pkcs11-check

CLI-first PKCS#11 test suite with segfault survival, interface forcing, and pytest plugin.

What it does

pkcs11-check runs comprehensive tests against PKCS#11 modules (hardware HSMs, software tokens, smart cards). It catches:

• Crashes and segfaults — per-file subprocess isolation recovers from SIGSEGV
• CKR return code violations — different spec conditions checked against OASIS PKCS#11 standard
• CVE regressions — tests for known CVEs across NSS, SoftHSM2, TPM2, OpenCryptoki
• Security policy violations — Tookan paper vectors, attribute fuzzing, padding oracle detection
• Interface negotiation bugs — v2.40/v3.0/v3.1/v3.2 with automatic fallback

Quick start

# Install
git clone https://github.com/mingulov/pkcs11-check
cd pkcs11-check
uv sync

# Run against any PKCS#11 module you provide
uv run pkcs11-check test --p11-module /path/to/module.so --p11-pin 1234

(See "First run in 60 seconds" below for a complete SoftHSM2 example. Provider build recipes and the Docker test matrix live in the development workspace.)

First run in 60 seconds (from PyPI)

pip install pkcs11-check

# 1. Make a token (one-time; SoftHSM2 is the easiest provider)
export SOFTHSM2_CONF="$HOME/softhsm2.conf"
mkdir -p "$HOME/softhsm2-tokens"
echo "directories.tokendir = $HOME/softhsm2-tokens" > "$SOFTHSM2_CONF"
softhsm2-util --init-token --slot 0 --label demo --pin 1234 --so-pin 5678

# 2. Diagnose the setup (module loads? slot / PIN / token OK?)
pkcs11-check doctor --module /usr/lib/softhsm/libsofthsm2.so --slot 0 --pin 1234

# 3. Fast first run (~2s)
pkcs11-check test --module /usr/lib/softhsm/libsofthsm2.so --pin 1234 --slot 0 --marker smoke

# 4. Optional: full coverage (downloads ~800 MB of vectors, then runs the suite)
pkcs11-check fetch-data all
pkcs11-check test --module /usr/lib/softhsm/libsofthsm2.so --pin 1234 --slot 0

Two non-obvious rules:

• --slot is a 0-based index into the token-present slots, not the provider's slot ID. Run pkcs11-check info --module <lib> (or pkcs11-check doctor) to list them. (NSS, for example, uses index 1.)
• fetch-data is optional — only the KAT / Wycheproof / ACVP suites need it; without it those are skipped and the rest still runs.

If anything fails, run pkcs11-check doctor first — it checks the module, slot, PIN, token, and data, and prints the exact next step for each problem.

Test suite

Test categories:

Category	Description
Core crypto	AES, RSA, ECDSA, EdDSA, HMAC, digest
Wycheproof	Edge-case vectors from C2SP
PQC (v3.2)	ML-KEM, ML-DSA, SLH-DSA
CKR compliance	Return code verification per OASIS spec
CVE regression	Known vulnerability tests
Security	Attribute fuzz, Tookan, handle reuse
Stress	Threading, resource exhaustion

Supported modules

Module	Version	Status
SoftHSM2	2.7.0	Full support
Kryoptic	1.5.1+PQC	Full support (v3.2)
NSS softokn	system	Crypto services (slot 0)
OpenCryptoki	3.27.0	Docker only
pkcs11-mock	2.0.0	Stub testing
tpm2-pkcs11	1.10.0	Hardware TPM
BouncyHSM	2.1.1	Docker only
wolfPKCS11	2.0.0-stable / master	Docker only
corePKCS11	3.6.4	Docker only

Known limitations in v0.1.0

• SO login is not implemented yet, so trusted-certificate import with CKA_TRUSTED=True is not fully covered through CKU_SO workflows.
• CloudHSM/Thales in-band IV profiles, proxy/loader mutable-parameter preservation checks, and broader mutable-output simulator targets are tracked as post-v0.1.0 interop work.

Architecture

src/pkcs11_check/
  raw/          — pure ctypes PKCS#11 binding (v2.40-v3.2, PQC)
  cli/          — typer CLI (test, doctor, info, version, … commands)
  core/         — module loader, isolation runner, preflight
  testcases/    — test files (the product)
    ckr/        — CKR return code compliance tests
  plugin.py     — pytest plugin (markers, fixtures, collection)
  fixtures.py   — p11_session, p11_module, p11_config
  config.py     — four-layer config (CLI > env > TOML > defaults)

Key features

• pkcs11_check.raw — pure Python ctypes binding with v2.40/v3.0/v3.1/v3.2 interface negotiation, 50+ PQC mechanisms, all 68 standard functions
• --isolation file mode runs each test file in its own subprocess — crashes don't kill the suite
• --ckr-strict mode enforces exact OASIS spec CKR codes (not just "any error")
• Wycheproof + ACVP vectors — cross-verification against C2SP and NIST test vectors

Documentation

• docs/architecture.md — codebase structure and test writing guide
• docs/commands.md — build, test, and Docker commands
• docs/module-issues.md — per-module bugs and quirks
• docs/test-universe.md — collected product-test counts by group
• docs/mechanism-output-parameters.md — generated IV/nonce/tag output-parameter coverage
• docs/cve-regression.md — CVE coverage tracker
• docs/file-isolation.md — isolation runner design

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Third-party attributions

pkcs11-check bundles the public-domain PKCS#11 v3.2 header from latchset/pkcs11-headers, and its fetch-data command downloads test vectors from C2SP and NIST. See THIRD_PARTY_LICENSES.md for the full list and per-source license terms.