#include "oatpp-openssl/server/ConnectionProvider.hpp"
#include "oatpp-openssl/Config.hpp"

...

const char* pemFile = "path/to/file.pem";
const char* crtFile = "path/to/file.crt";

auto config = oatpp::openssl::Config::createDefaultServerConfigShared(pemFile, crtFile);
auto connectionProvider = oatpp::openssl::server::ConnectionProvider::createShared(config, {"localhost", 443});

#include "oatpp-openssl/client/ConnectionProvider.hpp"
#include "oatpp-openssl/Config.hpp"
#include "oatpp-openssl/configurer/TrustStore.hpp"

...

const char* trust = "path/to/truststore";

auto config = oatpp::openssl::Config::createDefaultClientConfigShared();
config->addContextConfigurer(std::make_shared<oatpp::openssl::configurer::TrustStore>(trust, nullptr));
auto connectionProvider = oatpp::openssl::client::ConnectionProvider::createShared(config, {"httpbin.org", 443});