first what so ever registration

CMakeLists.txt

@@ -39,6 +39,7 @@ message("Compile options: " ${COMPILE_OPTIONS_STRING})
 
 find_package(nlohmann_json REQUIRED)
 find_package(FCGI REQUIRED)
+find_package(Argon2 REQUIRED)
 
 add_executable(${PROJECT_NAME} main.cpp)
 target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
@@ -59,6 +60,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE
     FCGI::FCGI
     FCGI::FCGI++
     nlohmann_json::nlohmann_json
+    Argon2::Argon2
 )
 
 install(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

README.md

@@ -7,6 +7,7 @@
 - fcgi
 - nlohmann_json
 - mariadb-client
+- argon2
 
 
 ### Building

cmake/FindArgon2.cmake

@@ -0,0 +1,26 @@
+find_library(Argon2_LIBRARIES argon2)
+find_path(Argon2_INCLUDE_DIR argon2.h)
+
+if (Argon2_LIBRARIES AND Argon2_INCLUDE_DIR)
+    set(Argon2_FOUND TRUE)
+endif()
+
+if (Argon2_FOUND)
+    add_library(Argon2::Argon2 SHARED IMPORTED)
+    set_target_properties(Argon2::Argon2 PROPERTIES
+        IMPORTED_LOCATION "${Argon2_LIBRARIES}"
+        INTERFACE_LINK_LIBRARIES "${Argon2_LIBRARIES}"
+        INTERFACE_INCLUDE_DIRECTORIES ${Argon2_INCLUDE_DIR}
+    )
+
+    if (NOT Argon2_FIND_QUIETLY)
+		message(STATUS "Found Argon2 includes:	${Argon2_INCLUDE_DIR}")
+        message(STATUS "Found Argon2 library:	${Argon2_LIBRARIES}")
+    endif ()
+else ()
+    if (Argon2_FIND_REQUIRED)
+        message(FATAL_ERROR "Could NOT find Argon2 development files")
+    endif ()
+endif ()
+
+

database/dbinterface.h

@@ -36,6 +36,8 @@ public:
     virtual uint8_t getVersion() = 0;
     virtual void setVersion(uint8_t version) = 0;
 
+    virtual unsigned int registerAccount(const std::string& login, const std::string& hash) = 0;
+
 protected:
     DBInterface(Type type);
 

database/migrations/m0.sql

@@ -17,17 +17,36 @@ CREATE TABLE IF NOT EXISTS accounts (
     `login` VARCHAR(256) UNIQUE NOT NULL,
     `nick` VARCHAR(256),
     `type` INTEGER UNSIGNED NOT NULL,
-    `password` VARCHAR(64),
+    `password` VARCHAR(128),
-    `salt` VARCHAR(32),
+    `created` TIMESTAMP DEFAULT UTC_TIMESTAMP()
-    `role` INTEGER UNSIGNED NOT NULL,
+);
-    `created` TIMESTAMP DEFAULT UTC_TIMESTAMP(),
 
+--creating role bindings table
+CREATE TABLE IF NOT EXISTS roleBindings (
+    `account` INTEGER UNSIGNED NOT NULL,
+    `role` INTEGER UNSIGNED NOT NULL,
+
+    PRIMARY KEY (account, role),
+    FOREIGN KEY (account) REFERENCES accounts(id),
     FOREIGN KEY (role) REFERENCES roles(id)
 );
 
+--creating sessings table
+CREATE TABLE IF NOT EXISTS sessions (
+    `id` INTEGER AUTO_INCREMENT PRIMARY KEY,
+    `owner` INTEGER UNSIGNED NOT NULL,
+    `started` TIMESTAMP DEFAULT UTC_TIMESTAMP(),
+    `latest` TIMESTAMP DEFAULT UTC_TIMESTAMP(),
+    `salt` CHAR(16),
+    `persist` BOOLEAN NOT NULL,
+
+    FOREIGN KEY (owner) REFERENCES accounts(id)
+);
+
 --creating defailt roles
 INSERT IGNORE INTO roles (`name`)
-VALUES ('root');
+VALUES ('root'),
+       ('default');
 
 --inserting initial version
 INSERT INTO system (`key`, `value`) VALUES ('version', '0');

database/mysql/CMakeLists.txt

@@ -1,11 +1,13 @@
 set(HEADERS
     mysql.h
     statement.h
+    transaction.h
 )
 
 set(SOURCES
     mysql.cpp
     statement.cpp
+    transaction.cpp
 )
 
 find_package(MariaDB REQUIRED)

database/mysql/mysql.cpp

@@ -9,8 +9,13 @@
 #include "mysqld_error.h"
 
 #include "statement.h"
+#include "transaction.h"
 
+constexpr const char* versionQuery = "SELECT value FROM system WHERE `key` = 'version'";
 constexpr const char* updateQuery = "UPDATE system SET `value` = ? WHERE `key` = 'version'";
+constexpr const char* registerQuery = "INSERT INTO accounts (`login`, `type`, `password`) VALUES (?, 1, ?)";
+constexpr const char* lastIdQuery = "SELECT LAST_INSERT_ID() AS id";
+constexpr const char* assignRoleQuery = "INSERT INTO roleBindings (`account`, `role`) SELECT ?, roles.id FROM roles WHERE roles.name = ?";
 
 static const std::filesystem::path buildSQLPath = "database";
 
@@ -34,7 +39,6 @@ MySQL::~MySQL() {
     mysql_close(&connection);
 }
 
-
 void MySQL::connect(const std::string& path) {
     if (state != State::disconnected)
         return;
@@ -138,7 +142,7 @@ void MySQL::executeFile(const std::filesystem::path& relativePath) {
 
 uint8_t MySQL::getVersion() {
     MYSQL* con = &connection;
-    int result = mysql_query(con, "SELECT value FROM system WHERE `key` = 'version'");
+    int result = mysql_query(con, versionQuery);
 
     if (result != 0) {
         unsigned int errcode = mysql_errno(con);
@@ -216,3 +220,48 @@ std::optional<std::string> MySQL::getComment(std::string& string) {
     return std::nullopt;
 }
 
+unsigned int MySQL::registerAccount(const std::string& login, const std::string& hash) {
+    //TODO validate filed lengths!
+    MYSQL* con = &connection;
+    MySQL::Transaction txn(con);
+
+    Statement addAcc(con, registerQuery);
+
+    std::string l = login;      //I hate copying just to please this horible API
+    std::string h = hash;
+    addAcc.bind(l.data(), MYSQL_TYPE_STRING);
+    addAcc.bind(h.data(), MYSQL_TYPE_STRING);
+    addAcc.execute();
+
+    unsigned int id = lastInsertedId();
+    static std::string defaultRole("default");
+
+    Statement addRole(con, assignRoleQuery);
+    addRole.bind(&id, MYSQL_TYPE_LONG, true);
+    addRole.bind(defaultRole.data(), MYSQL_TYPE_STRING);
+    addRole.execute();
+
+    txn.commit();
+    return id;
+}
+
+unsigned int MySQL::lastInsertedId() {
+    MYSQL* con = &connection;
+    int result = mysql_query(con, lastIdQuery);
+
+    if (result != 0)
+        throw std::runtime_error(std::string("Error executing last inserted id: ") + mysql_error(con));
+
+    std::unique_ptr<MYSQL_RES, ResDeleter> res(mysql_store_result(con));
+    if (!res)
+        throw std::runtime_error(std::string("Querying last inserted id returned no result: ") + mysql_error(con));
+
+    MYSQL_ROW row = mysql_fetch_row(res.get());
+    if (row)
+        return std::stoi(row[0]);
+    else
+        throw std::runtime_error(std::string("Querying last inserted id returned no rows"));
+}
+
+
+

database/mysql/mysql.h

@@ -14,6 +14,7 @@
 
 class MySQL : public DBInterface {
     class Statement;
+    class Transaction;
 public:
     MySQL();
     ~MySQL() override;
@@ -27,9 +28,12 @@ public:
     uint8_t getVersion() override;
     void setVersion(uint8_t version) override;
 
+    unsigned int registerAccount(const std::string& login, const std::string& hash) override;
+
 private:
     void executeFile(const std::filesystem::path& relativePath);
     static std::optional<std::string> getComment(std::string& string);
+    unsigned int lastInsertedId();
 
 protected:
     MYSQL connection;

database/mysql/statement.cpp

@@ -9,15 +9,14 @@ static uint64_t TIME_LENGTH = sizeof(MYSQL_TIME);
 
 MySQL::Statement::Statement(MYSQL* connection, const char* statement):
     stmt(mysql_stmt_init(connection)),
-    param(),
+    param()
-    lengths()
 {
     int result = mysql_stmt_prepare(stmt.get(), statement, strlen(statement));
     if (result != 0)
         throw std::runtime_error(std::string("Error preparing statement: ") + mysql_stmt_error(stmt.get()));
 }
 
-void MySQL::Statement::bind(void* value, enum_field_types type) {
+void MySQL::Statement::bind(void* value, enum_field_types type, bool usigned) {
     MYSQL_BIND& result = param.emplace_back();
     std::memset(&result, 0, sizeof(result));
 
@@ -27,13 +26,18 @@ void MySQL::Statement::bind(void* value, enum_field_types type) {
    switch (type) {
         case MYSQL_TYPE_STRING:
         case MYSQL_TYPE_VAR_STRING:
-            result.length = &lengths.emplace_back(strlen(static_cast<char*>(value)));
+            result.buffer_length = strlen(static_cast<char*>(value));
             break;
         case MYSQL_TYPE_DATE:
-            result.length = &TIME_LENGTH;
+            result.buffer_length = TIME_LENGTH;
+            break;
+        case MYSQL_TYPE_LONG:
+        case MYSQL_TYPE_LONGLONG:
+        case MYSQL_TYPE_SHORT:
+        case MYSQL_TYPE_TINY:
+                result.is_unsigned = usigned;
             break;
         default:
-            lengths.pop_back();
             throw std::runtime_error("Type: " + std::to_string(type) + " is not yet supported in bind");
             break;
     }

database/mysql/statement.h

@@ -7,7 +7,6 @@
 
 #include "mysql.h"
 
-
 class MySQL::Statement {
     struct STMTDeleter {
         void operator () (MYSQL_STMT* stmt) {
@@ -17,11 +16,10 @@ class MySQL::Statement {
 public:
     Statement(MYSQL* connection, const char* statement);
 
-    void bind(void* value, enum_field_types type);
+    void bind(void* value, enum_field_types type, bool usigned = false);
     void execute();
 
 private:
     std::unique_ptr<MYSQL_STMT, STMTDeleter> stmt;
     std::vector<MYSQL_BIND> param;
-    std::vector<uint64_t> lengths;
 };

database/mysql/transaction.cpp

@@ -0,0 +1,34 @@
+#include "transaction.h"
+
+MySQL::Transaction::Transaction(MYSQL* connection):
+    con(connection),
+    opened(false)
+{
+    if (mysql_autocommit(con, 0) != 0)
+        throw std::runtime_error(std::string("Failed to start transaction") + mysql_error(con));
+
+    opened = true;
+}
+
+MySQL::Transaction::~Transaction() {
+    if (opened)
+        abort();
+}
+
+void MySQL::Transaction::commit() {
+    if (mysql_commit(con) != 0)
+        throw std::runtime_error(std::string("Failed to commit transaction") + mysql_error(con));
+
+    opened = false;
+    if (mysql_autocommit(con, 1) != 0)
+        throw std::runtime_error(std::string("Failed to return autocommit") + mysql_error(con));
+}
+
+void MySQL::Transaction::abort() {
+    opened = false;
+    if (mysql_rollback(con) != 0)
+        throw std::runtime_error(std::string("Failed to rollback transaction") + mysql_error(con));
+
+    if (mysql_autocommit(con, 1) != 0)
+        throw std::runtime_error(std::string("Failed to return autocommit") + mysql_error(con));
+}

database/mysql/transaction.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "mysql.h"
+
+class MySQL::Transaction {
+public:
+    Transaction(MYSQL* connection);
+    ~Transaction();
+
+    void commit();
+    void abort();
+
+private:
+    MYSQL* con;
+    bool opened;
+};

handler/register.cpp

@@ -3,20 +3,57 @@
 
 #include "register.h"
 
-Handler::Register::Register():
+#include "server/server.h"
-    Handler("register", Request::Method::post)
+
+Handler::Register::Register(Server* server):
+    Handler("register", Request::Method::post),
+    server(server)
 {}
 
 void Handler::Register::handle(Request& request) {
     std::map form = request.getForm();
+    std::map<std::string, std::string>::const_iterator itr = form.find("login");
+    if (itr == form.end())
+        return error(request, Result::noLogin);
 
-    std::cout << "Received form:" << std::endl;
+    const std::string& login = itr->second;
-    for (const auto& pair : form)
+    if (login.empty())
-        std::cout << '\t' << pair.first << ": " << pair.second << std::endl;
+        return error(request, Result::emptyLogin);
+
+    //TODO login policies checkup
+
+    itr = form.find("password");
+    if (itr == form.end())
+        return error(request, Result::noPassword);
+
+    const std::string& password = itr->second;
+    if (password.empty())
+        return error(request, Result::emptyPassword);
+
+    //TODO password policies checkup
+
+    try {
+        server->registerAccount(login, password);
+    } catch (const std::exception& e) {
+        std::cerr << "Exception on registration:\n\t" << e.what() << std::endl;
+        return error(request, Result::unknownError);
+    } catch (...) {
+        std::cerr << "Unknown exception on registration" << std::endl;
+        return error(request, Result::unknownError);
+    }
 
     Response res(request);
     nlohmann::json body = nlohmann::json::object();
-    body["result"] = "ok";
+    body["result"] = Result::success;
+
+    res.setBody(body);
+    res.send();
+}
+
+void Handler::Register::error(Request& request, Result result) {
+    Response res(request);
+    nlohmann::json body = nlohmann::json::object();
+    body["result"] = result;
 
     res.setBody(body);
     res.send();

handler/register.h

@@ -5,12 +5,30 @@
 
 #include "handler.h"
 
+class Server;
 namespace Handler {
 
 class Register : public Handler::Handler {
 public:
-    Register();
+    Register(Server* server);
     virtual void handle(Request& request);
 
+    enum class Result {
+        success,
+        noLogin,
+        emptyLogin,
+        loginExists,
+        loginPolicyViolation,
+        noPassword,
+        emptyPassword,
+        passwordPolicyViolation,
+        unknownError
+    };
+
+private:
+    void error(Request& request, Result result);
+
+private:
+    Server* server;
 };
 }

server/router.cpp

@@ -44,6 +44,7 @@ void Router::route(const std::string& path, std::unique_ptr<Request> request) {
         return handleNotFound(path, std::move(request));
 
     try {
+        std::cout << "Handling " << path << "..." << std::endl;
         itr->second->handle(*request.get());
 
         if (request->currentState() != Request::State::responded)

server/server.cpp

@@ -3,11 +3,20 @@
 
 #include "server.h"
 
+#include <random>
+
 #include "handler/info.h"
 #include "handler/env.h"
 #include "handler/register.h"
 
+constexpr const char* pepper = "well, not much of a secret, huh?";
 constexpr uint8_t currentDbVesion = 1;
+constexpr const char* randomChars = "0123456789abcdef";
+constexpr uint8_t saltSize = 16;
+constexpr uint8_t hashSize = 32;
+constexpr uint8_t hashParallel = 1;
+constexpr uint8_t hashIterations = 2;
+constexpr uint32_t hashMemoryCost = 65536;
 
 Server::Server():
     terminating(false),
@@ -29,7 +38,7 @@ Server::Server():
 
     router.addRoute(std::make_unique<Handler::Info>());
     router.addRoute(std::make_unique<Handler::Env>());
-    router.addRoute(std::make_unique<Handler::Register>());
+    router.addRoute(std::make_unique<Handler::Register>(this));
 }
 
 Server::~Server() {}
@@ -63,3 +72,38 @@ void Server::handleRequest(std::unique_ptr<Request> request) {
     std::string path = request->getPath(serverName.value());
     router.route(path.data(), std::move(request));
 }
+
+std::string Server::generateRandomString(std::size_t length) {
+    std::random_device rd;
+    std::mt19937 gen(rd());
+    std::uniform_int_distribution<uint8_t> distribution(0, std::strlen(randomChars));
+
+    std::string result(length, 0);
+    for (size_t i = 0; i < length; ++i)
+        result[i] = randomChars[distribution(gen)];
+
+    return result;
+}
+
+unsigned int Server::registerAccount(const std::string& login, const std::string& password) {
+    std::size_t encSize = argon2_encodedlen(
+        hashIterations, hashMemoryCost,
+        hashParallel, saltSize, hashSize, Argon2_id
+    );
+
+    std::string hash(encSize, 0);
+    std::string salt = generateRandomString(saltSize);
+    std::string spiced = password + pepper;
+
+    int result = argon2id_hash_encoded(
+        hashIterations, hashMemoryCost, hashParallel,
+        spiced.data(), spiced.size(),
+        salt.data(), saltSize,
+        hashSize, hash.data(), encSize
+    );
+
+    if (result != ARGON2_OK)
+        throw std::runtime_error(std::string("Hashing failed: ") + argon2_error_message(result));
+
+    return db->registerAccount(login, hash);
+}

server/server.h

@@ -15,7 +15,7 @@
 #include <fcgio.h>
 #include <stdint.h>
 
-#include <nlohmann/json.hpp>
+#include <argon2.h>
 
 #include "request/request.h"
 #include "response/response.h"
@@ -31,8 +31,11 @@ public:
 
     void run(int socketDescriptor);
 
+    unsigned int registerAccount(const std::string& login, const std::string& password);
+
 private:
     void handleRequest(std::unique_ptr<Request> request);
+    static std::string generateRandomString(std::size_t length);
 
 private:
     bool terminating;