Method VerifyData

src/openrct2/core/Crypt.OpenSSL.cpp:296–327

    }

    bool VerifyData(const RsaKey& key, const void* data, size_t dataLen, const void* sig, size_t sigLen) 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_DigestVerifyInit(mdctx, nullptr, EVP_sha256(), nullptr, evpKey);
            OpenSSLThrowOnBadStatus("EVP_DigestVerifyInit", status);

            status = EVP_DigestVerifyUpdate(mdctx, data, dataLen);
            OpenSSLThrowOnBadStatus("EVP_DigestVerifyUpdate", status);

            status = EVP_DigestVerifyFinal(mdctx, static_cast<const uint8_t*>(sig), sigLen);
            if (status != 0 && status != 1)
            {
                OpenSSLThrowOnBadStatus("EVP_DigestVerifyUpdate", status);
            }
            EVP_MD_CTX_destroy(mdctx);
            return status == 1;
        }
        catch (const std::exception&)
        {
            EVP_MD_CTX_destroy(mdctx);
            throw;
        }
    }
};

namespace OpenRCT2::Crypt