C++ (Cpp) internal_private_key Examples

Example #1

File: backend_openssl.cpp Project: sachinkashyapbs/vanetza

EcdsaSignature BackendOpenSsl::sign_data(const ecdsa256::PrivateKey& key, const ByteBuffer& data)
{
    auto priv_key = internal_private_key(key);
    auto digest = calculate_digest(data);

    // sign message data represented by the digest
    openssl::Signature signature { ECDSA_do_sign(digest.data(), digest.size(), priv_key) };

    EcdsaSignature ecdsa_signature;
    X_Coordinate_Only coordinate;

    if (signature) {
        const size_t len = field_size(PublicKeyAlgorithm::Ecdsa_Nistp256_With_Sha256);
        const auto num_bytes_s = BN_num_bytes(signature->s);
        assert(len >= static_cast<size_t>(num_bytes_s));
        ecdsa_signature.s.resize(len, 0x00);
        BN_bn2bin(signature->s, ecdsa_signature.s.data() + len - num_bytes_s);

        const auto num_bytes_r = BN_num_bytes(signature->r);
        assert(len >= static_cast<size_t>(num_bytes_r));
        coordinate.x.resize(len, 0x00);
        BN_bn2bin(signature->r, coordinate.x.data() + len - num_bytes_r);
    } else {
        throw openssl::Exception();
    }

    ecdsa_signature.R = std::move(coordinate);
    return ecdsa_signature;
}

Example #2

File: backend_openssl.cpp Project: riebl/vanetza

EcdsaSignature BackendOpenSsl::sign_data(const ecdsa256::PrivateKey& key, const ByteBuffer& data)
{
    auto priv_key = internal_private_key(key);
    auto digest = calculate_digest(data);

    // sign message data represented by the digest
    openssl::Signature signature { ECDSA_do_sign(digest.data(), digest.size(), priv_key) };
#if OPENSSL_API_COMPAT < 0x10100000L
    const BIGNUM* sig_r = signature->r;
    const BIGNUM* sig_s = signature->s;
#else
    const BIGNUM* sig_r = nullptr;
    const BIGNUM* sig_s = nullptr;
    ECDSA_SIG_get0(signature, &sig_r, &sig_s);
#endif

    EcdsaSignature ecdsa_signature;
    X_Coordinate_Only coordinate;

    if (sig_r && sig_s) {
        const size_t len = field_size(PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256);

        const auto num_bytes_s = BN_num_bytes(sig_s);
        assert(len >= static_cast<size_t>(num_bytes_s));
        ecdsa_signature.s.resize(len, 0x00);
        BN_bn2bin(sig_s, ecdsa_signature.s.data() + len - num_bytes_s);

        const auto num_bytes_r = BN_num_bytes(sig_r);
        assert(len >= static_cast<size_t>(num_bytes_r));
        coordinate.x.resize(len, 0x00);
        BN_bn2bin(sig_r, coordinate.x.data() + len - num_bytes_r);
    } else {
        throw openssl::Exception();
    }

    ecdsa_signature.R = std::move(coordinate);
    return ecdsa_signature;
}