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PQ Crypto Catalog

This is a repository of post-quantum schemes coppied from the submission to the NIST Post-Quantum Standarization. The sources were cloned from the PQClean project to form new library. The goal of the library is mainly experimentation.

Users shouldn’t expect any level of security provided by this code.

Schemes

Key Encapsulation Mechanisms

Finalists:

Kyber
NTRU
SABER

Alternate candidates:

FrodoKEM

Signature schemes

Finalists:

Dilithium
Falcon
Rainbow

Alternate candidates:

SPHINCS+

Building

CMake is used to build the library:

mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

Build outputs two libraries, a static libpqc_s.a and dynamic libpqc.so, which can be linked with a project.

API

Library provides simple API, wrapping PQClean. For example to use KEM, one should call the library in following way:

    #include <pqc/pqc.h>

    std::vector<uint8_t> ct(ciphertext_bsz(p));
    std::vector<uint8_t> ss1(shared_secret_bsz(p));
    std::vector<uint8_t> ss2(shared_secret_bsz(p));
    std::vector<uint8_t> sk(private_key_bsz(p));
    std::vector<uint8_t> pk(public_key_bsz(p));

    const params_t *p = pqc_kem_alg_by_id(KYBER512);
    pqc_keygen(p, pk.data(), sk.data());
    pqc_kem_encapsulate(p, ct.data(), ss1.data(), pk.data());
    pqc_kem_decapsulate(p, ss2.data(), ct.data(), sk.data());
    
    const params_t *p = pqc_sig_alg_by_id(DILITHIUM2);
    size_t sigsz = sig.capacity();
    pqc_keygen(p, pk.data(), sk.data());
    pqc_sig_create(p, sig.data(), &sigsz, msg.data(), msg.size(), sk.data());
    pqc_sig_verify(p, sig.data(), sig.size(), msg.data(), msg.size(), pk.data());

See test implemetnation in test/ut.cpp for more details.

Rust binding

Rust bindgings are provided in the src/rustapi/pqc-sys and can be regenerated automatically by running cargo build in this directory.

Testing

Algorithms are tested against KATs, by the runner implemented in the teste/katrunner (wip). The runner uses katwalk crate.

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