/*
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lime-tester-utils.hpp
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@author Johan Pascal
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@copyright Copyright (C) 2017 Belledonne Communications SARL
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef lime_tester_utils_hpp
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#define lime_tester_utils_hpp
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#include "bctoolbox/crypto.h"
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#include "lime_double_ratchet.hpp"
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#include "lime_localStorage.hpp"
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#include "belle-sip/belle-sip.h"
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#include "lime_crypto_primitives.hpp"
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#include "soci/sqlite3/soci-sqlite3.h"
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#include <random>
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#include <mutex>
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using namespace::lime;
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namespace lime_tester {
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// default url and ports of X3DH servers
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extern std::string test_x3dh_server_url;
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extern std::string test_x3dh_c25519_server_port;
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extern std::string test_x3dh_c448_server_port;
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// messages pattern
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extern std::string shortMessage;
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extern std::string longMessage;
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extern std::string veryLongMessage;
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extern std::vector<std::string> messages_pattern;
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// default value for the timeout
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extern int wait_for_timeout;
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// default value for initial OPk batch size, keep it small so not too many OPks generated
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extern uint16_t OPkInitialBatchSize;
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/**
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* @brief Simple RNG function, used to generate random values for testing purpose, they do not need to be real random
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* so use directly std::random_device
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*
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* @param[in] buffer pointer to the begining of the buffer to be filled
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* @param[in] size how many random bytes you want
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*/
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void randomize(uint8_t *buffer, const size_t size);
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/**
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* @brief Create and initialise the two sessions given in parameter. Alice as sender session and Bob as receiver one
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* Alice must then send the first message, once bob got it, sessions are fully initialised
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* if fileName doesn't exists as a DB, it will be created, caller shall then delete it if needed
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*/
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template <typename Curve>
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void dr_sessionsInit(std::shared_ptr<DR<Curve>> &alice, std::shared_ptr<DR<Curve>> &bob, std::shared_ptr<lime::Db> &localStorageAlice, std::shared_ptr<lime::Db> &localStorageBob, std::string dbFilenameAlice, std::shared_ptr<std::recursive_mutex> db_mutex_alice, std::string dbFilenameBob, std::shared_ptr<std::recursive_mutex> db_mutex_bob, bool initStorage, std::shared_ptr<RNG> RNG_context);
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/* non efficient but used friendly structure to store all details about a session */
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/* the self_xx are redundants but it's for testing purpose */
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template <typename Curve>
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struct sessionDetails {
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std::string self_userId;
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std::size_t self_userIndex;
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std::size_t self_deviceIndex;
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std::string peer_userId;
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std::size_t peer_userIndex;
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std::size_t peer_deviceIndex;
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std::shared_ptr<DR<Curve>> DRSession; // Session to reach recipient
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std::shared_ptr<lime::Db> localStorage; // db linked to device
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sessionDetails() : self_userId{}, self_userIndex{0}, self_deviceIndex{0}, peer_userId{}, peer_userIndex{0}, peer_deviceIndex{0}, DRSession{}, localStorage{} {};
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sessionDetails(std::string &s_userId, size_t s_userIndex, size_t s_deviceIndex, std::string &p_userId, size_t p_userIndex, size_t p_deviceIndex)
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: self_userId{s_userId}, self_userIndex{s_userIndex}, self_deviceIndex{s_deviceIndex}, peer_userId{p_userId}, peer_userIndex{p_userIndex}, peer_deviceIndex{p_deviceIndex}, DRSession{}, localStorage{} {};
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};
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/**
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* @brief Create and initialise all requested DR sessions for specified number of devices between two or more users
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* users is a vector of users(already sized to correct size, matching usernames size), each one holds a vector of devices(already sized for each device)
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* This function will create and instanciate in each device a vector of vector of DR sessions towards all other devices: each device vector holds a bidimentionnal array indexed by userId and deviceId.
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* Session init is done considering as initial sender the lowest id user and in it the lowest id device
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* createdDBfiles is filled with all filenames of DB created to allow easy deletion
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*/
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template <typename Curve>
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void dr_devicesInit(std::string dbBaseFilename, std::vector<std::vector<std::vector<std::vector<sessionDetails<Curve>>>>> &users, std::vector<std::string> &usernames, std::vector<std::string> &createdDBfiles, std::shared_ptr<RNG> RNG_context);
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/* return true if the message buffer is a DR message wiht the paylod direct encryption flag set */
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bool DR_message_payloadDirectEncrypt(std::vector<uint8_t> &message);
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/* return true if the message buffer is a valid DR message holding a X3DH init one in its header */
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bool DR_message_holdsX3DHInit(std::vector<uint8_t> &message);
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/* this version will set the OPk status in the given bool if a packet is found */
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bool DR_message_holdsX3DHInit(std::vector<uint8_t> &message, bool &haveOPk);
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/* return true if the message buffer is a valid DR message holding a X3DH init one in its header and copy the X3DH init message in the provided buffer */
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bool DR_message_extractX3DHInit(std::vector<uint8_t> &message, std::vector<uint8_t> &X3DH_initMessage);
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/* return true if the message buffer is a valid DR message holding an X3DH init message, copy its SPk id in the given parameter */
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bool DR_message_extractX3DHInit_SPkId(std::vector<uint8_t> &message, uint32_t &SPkId);
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/* Open provided DB and look for DRSessions established between selfDevice and peerDevice
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* Populate the sessionsId vector with the Ids of sessions found
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* return the id of the active session if one is found, 0 otherwise */
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long int get_DRsessionsId(const std::string &dbFilename, const std::string &selfDeviceId, const std::string &peerDeviceId, std::vector<long int> &sessionsId) noexcept;
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/* Open provided DB, look for DRSessions established between selfDevice and peerDevice, count the stored message keys in all these sessions
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* return 0 if no sessions found or no user found
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*/
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unsigned int get_StoredMessageKeyCount(const std::string &dbFilename, const std::string &selfDeviceId, const std::string &peerDeviceId) noexcept;
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/* For the given deviceId, count the number of associated SPk and return the Id of the active one(if any)
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* return true if an active one was found
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*/
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bool get_SPks(const std::string &dbFilename, const std::string &selfDeviceId, size_t &count, uint32_t &activeId) noexcept;
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/* For the given deviceId, count the number of associated OPk
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*/
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size_t get_OPks(const std::string &dbFilename, const std::string &selfDeviceId) noexcept;
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/* Move back in time all timeStamps by the given amout of days
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* DB holds timeStamps in DR_sessions and X3DH_SPK tables
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*/
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void forwardTime(const std::string &dbFilename, int days) noexcept;
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/**
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* @brief append a random suffix to user name to avoid collision if test server is user by several tests runs
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*
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* @param[in] basename
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*
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* @return a shared ptr towards a string holding name+ 6 chars random suffix
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*/
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std::shared_ptr<std::string> makeRandomDeviceName(const char *basename);
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// wait for a counter to reach a value or timeout to occur, gives ticks to the belle-sip stack every SLEEP_TIME
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// structure used by callbacks to register events
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struct events_counters_t {
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int operation_success;
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int operation_failed;
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events_counters_t() : operation_success{0}, operation_failed{0} {};
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bool operator==(const events_counters_t &b) const {return this->operation_success==b.operation_success && this->operation_failed==b.operation_failed;}
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};
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// wait for a counter to reach a value or timeout to occur, gives ticks to the belle-sip stack every SLEEP_TIME
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int wait_for(belle_sip_stack_t*s1,int* counter,int value,int timeout);
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int wait_for_mutex(belle_sip_stack_t*s1,int* counter,int value,int timeout, std::shared_ptr<std::recursive_mutex> mutex);
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// template instanciation are done in lime-tester-utils.cpp
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#ifdef EC25519_ENABLED
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extern template void dr_sessionsInit<C255>(std::shared_ptr<DR<C255>> &alice, std::shared_ptr<DR<C255>> &bob, std::shared_ptr<lime::Db> &localStorageAlice, std::shared_ptr<lime::Db> &localStorageBob, std::string dbFilenameAlice, std::shared_ptr<std::recursive_mutex> db_mutex_alice, std::string dbFilenameBob, std::shared_ptr<std::recursive_mutex> db_mutex_bob, bool initStorage, std::shared_ptr<RNG> RNG_context);
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extern template void dr_devicesInit<C255>(std::string dbBaseFilename, std::vector<std::vector<std::vector<std::vector<sessionDetails<C255>>>>> &users, std::vector<std::string> &usernames, std::vector<std::string> &createdDBfiles, std::shared_ptr<RNG> RNG_context);
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#endif
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#ifdef EC448_ENABLED
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extern template void dr_sessionsInit<C448>(std::shared_ptr<DR<C448>> &alice, std::shared_ptr<DR<C448>> &bob, std::shared_ptr<lime::Db> &localStorageAlice, std::shared_ptr<lime::Db> &localStorageBob, std::string dbFilenameAlice, std::shared_ptr<std::recursive_mutex> db_mutex_alice, std::string dbFilenameBob, std::shared_ptr<std::recursive_mutex> db_mutex_bob, bool initStorage, std::shared_ptr<RNG> RNG_context);
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extern template void dr_devicesInit<C448>(std::string dbBaseFilename, std::vector<std::vector<std::vector<std::vector<sessionDetails<C448>>>>> &users, std::vector<std::string> &usernames, std::vector<std::string> &createdDBfiles, std::shared_ptr<RNG> RNG_context);
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#endif
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} // namespace lime_tester
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extern "C" {
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#ifdef FFI_ENABLED
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/* some shared variable defined in lime_ff-tester, used only when FFI is enabled
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* and they are duplicate of command line arguments variable already existing in C++ from lime_tester-utils.cpp
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* but it's easier to read and implement this way */
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// ffi default url and ports of X3DH servers
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extern char ffi_test_x3dh_server_url[512];
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extern char ffi_test_x3dh_c25519_server_port[16];
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extern char ffi_test_x3dh_c448_server_port[16];
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// ffi default value for the timeout
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extern int ffi_wait_for_timeout;
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#endif
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}
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#endif //lime_tester_utils_hpp
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