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#pragma once
#include <app.hpp>
#include <boost/container/flat_map.hpp>
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_generators.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <http_request.hpp>
#include <http_response.hpp>
#include <nlohmann/json.hpp>
#include <pam_authenticate.hpp>
#include <sessions.hpp>
#include <filesystem>
#include <fstream>
#include <random>
namespace persistent_data
{
class ConfigFile
{
uint64_t jsonRevision = 1;
public:
// todo(ed) should read this from a fixed location somewhere, not CWD
static constexpr const char* filename = "bmcweb_persistent_data.json";
ConfigFile()
{
readData();
}
~ConfigFile()
{
if (persistent_data::SessionStore::getInstance().needsWrite())
{
writeData();
}
}
// TODO(ed) this should really use protobuf, or some other serialization
// library, but adding another dependency is somewhat outside the scope of
// this application for the moment
void readData()
{
std::ifstream persistentFile(filename);
uint64_t fileRevision = 0;
if (persistentFile.is_open())
{
// call with exceptions disabled
auto data = nlohmann::json::parse(persistentFile, nullptr, false);
if (data.is_discarded())
{
BMCWEB_LOG_ERROR
<< "Error parsing persistent data in json file.";
}
else
{
for (const auto& item : data.items())
{
if (item.key() == "revision")
{
fileRevision = 0;
const uint64_t* uintPtr =
item.value().get_ptr<const uint64_t*>();
if (uintPtr == nullptr)
{
BMCWEB_LOG_ERROR << "Failed to read revision flag";
}
else
{
fileRevision = *uintPtr;
}
}
else if (item.key() == "system_uuid")
{
const std::string* jSystemUuid =
item.value().get_ptr<const std::string*>();
if (jSystemUuid != nullptr)
{
systemUuid = *jSystemUuid;
}
}
else if (item.key() == "auth_config")
{
SessionStore::getInstance()
.getAuthMethodsConfig()
.fromJson(item.value());
}
else if (item.key() == "sessions")
{
for (const auto& elem : item.value())
{
std::shared_ptr<UserSession> newSession =
UserSession::fromJson(elem);
if (newSession == nullptr)
{
BMCWEB_LOG_ERROR << "Problem reading session "
"from persistent store";
continue;
}
BMCWEB_LOG_DEBUG
<< "Restored session: " << newSession->csrfToken
<< " " << newSession->uniqueId << " "
<< newSession->sessionToken;
SessionStore::getInstance().authTokens.emplace(
newSession->sessionToken, newSession);
}
}
else if (item.key() == "timeout")
{
const int64_t* jTimeout =
item.value().get_ptr<int64_t*>();
if (jTimeout == nullptr)
{
BMCWEB_LOG_DEBUG
<< "Problem reading session timeout value";
continue;
}
std::chrono::seconds sessionTimeoutInseconds(*jTimeout);
BMCWEB_LOG_DEBUG << "Restored Session Timeout: "
<< sessionTimeoutInseconds.count();
SessionStore::getInstance().updateSessionTimeout(
sessionTimeoutInseconds);
}
else
{
// Do nothing in the case of extra fields. We may have
// cases where fields are added in the future, and we
// want to at least attempt to gracefully support
// downgrades in that case, even if we don't officially
// support it
}
}
}
}
bool needWrite = false;
if (systemUuid.empty())
{
systemUuid =
boost::uuids::to_string(boost::uuids::random_generator()());
needWrite = true;
}
if (fileRevision < jsonRevision)
{
needWrite = true;
}
// write revision changes or system uuid changes immediately
if (needWrite)
{
writeData();
}
}
void writeData()
{
std::ofstream persistentFile(filename);
// set the permission of the file to 640
std::filesystem::perms permission =
std::filesystem::perms::owner_read |
std::filesystem::perms::owner_write |
std::filesystem::perms::group_read;
std::filesystem::permissions(filename, permission);
const auto& c = SessionStore::getInstance().getAuthMethodsConfig();
nlohmann::json data{
{"auth_config",
{{"XToken", c.xtoken},
{"Cookie", c.cookie},
{"SessionToken", c.sessionToken},
{"BasicAuth", c.basic},
{"TLS", c.tls}}
},
{"system_uuid", systemUuid},
{"revision", jsonRevision},
{"timeout", SessionStore::getInstance().getTimeoutInSeconds()}};
nlohmann::json& sessions = data["sessions"];
sessions = nlohmann::json::array();
for (const auto& p : SessionStore::getInstance().authTokens)
{
if (p.second->persistence !=
persistent_data::PersistenceType::SINGLE_REQUEST)
{
sessions.push_back({
{"unique_id", p.second->uniqueId},
{"session_token", p.second->sessionToken},
{"username", p.second->username},
{"csrf_token", p.second->csrfToken},
{"client_ip", p.second->clientIp},
#ifdef BMCWEB_ENABLE_IBM_MANAGEMENT_CONSOLE
{"client_id", p.second->clientId},
#endif
});
}
}
persistentFile << data;
}
std::string systemUuid{""};
};
inline ConfigFile& getConfig()
{
static ConfigFile f;
return f;
}
} // namespace persistent_data
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