Method SignData

src/openrct2/core/Crypt.OpenSSL.cpp:258–294

{
public:
    std::vector<uint8_t> SignData(const RsaKey& key, const void* data, size_t dataLen) override
    {
        auto evpKey = static_cast<const OpenSSLRsaKey&>(key).GetEvpKey();
        EVP_MD_CTX* mdctx{};
        try
        {
            mdctx = EVP_MD_CTX_create();
            if (mdctx == nullptr)
            {
                throw std::runtime_error("EVP_MD_CTX_create failed");
            }

            auto status = EVP_DigestSignInit(mdctx, nullptr, EVP_sha256(), nullptr, evpKey);
            OpenSSLThrowOnBadStatus("EVP_DigestSignInit failed", status);

            status = EVP_DigestSignUpdate(mdctx, data, dataLen);
            OpenSSLThrowOnBadStatus("EVP_DigestSignUpdate failed", status);

            // Get required length of signature
            size_t sigLen{};
            status = EVP_DigestSignFinal(mdctx, nullptr, &sigLen);
            OpenSSLThrowOnBadStatus("EVP_DigestSignFinal failed", status);

            // Get signature
            std::vector<uint8_t> signature(sigLen);
            status = EVP_DigestSignFinal(mdctx, signature.data(), &sigLen);
            OpenSSLThrowOnBadStatus("EVP_DigestSignFinal failed", status);

            EVP_MD_CTX_destroy(mdctx);
            return signature;
        }
        catch (const std::exception&)
        {
            EVP_MD_CTX_destroy(mdctx);
            throw;
        }
    }

    bool VerifyData(const RsaKey& key, const void* data, size_t dataLen, const void* sig, size_t sigLen) override
    {