Function start_crypt

src/burp/mvol.cpp:253–308

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//
//
static void start_crypt(BurpGlobals* tdgbl)
{
	fb_assert(tdgbl->gbl_sw_keyholder);
	if (tdgbl->gbl_crypt && tdgbl->gbl_crypt->crypt_plugin)
		return;

	FbLocalStatus status;

	// Get per-DB config
	Firebird::PathName dummy;
	Firebird::RefPtr<const Firebird::Config> config;
	expandDatabaseName(tdgbl->gbl_database_file_name, dummy, &config);

	// Prepare key holders
	Firebird::IKeyHolderPlugin* keyHolder = mvol_get_holder(tdgbl, config);

	// Load crypt plugin
	if (!tdgbl->mvol_crypt)
		tdgbl->mvol_crypt = tdgbl->gbl_sw_crypt;
	if (!tdgbl->mvol_crypt)
		BURP_error(378, true);

	Firebird::GetPlugins<Firebird::IDbCryptPlugin>
		cryptControl(Firebird::IPluginManager::TYPE_DB_CRYPT, config, tdgbl->mvol_crypt);
	if (!cryptControl.hasData())
		(Firebird::Arg::Gds(isc_no_crypt_plugin) << tdgbl->mvol_crypt).raise();

	Firebird::RefPtr<DbInfo> dbInfo(FB_NEW DbInfo(tdgbl));
	Firebird::IDbCryptPlugin* p = cryptControl.plugin();
	p->setInfo(&status, dbInfo);
	if (!status.isSuccess())
	{
		const ISC_STATUS* v = status->getErrors();
		if (v[0] == isc_arg_gds && v[1] != isc_arg_end && v[1] != isc_interface_version_too_old)
			Firebird::status_exception::raise(&status);
	}

	// Initialize key in crypt plugin
	p->setKey(&status, 1, &keyHolder, tdgbl->mvol_keyname);
	check(&status);

	// Validate hash
	if (tdgbl->gbl_key_hash[0])
	{
		Firebird::string hash;
		calc_hash(hash, p);
		if (hash != tdgbl->gbl_key_hash)
			(Firebird::Arg::Gds(isc_bad_crypt_key) << tdgbl->mvol_keyname).raise();
	}

	// crypt plugin is ready
	BurpCrypt* g = tdgbl->gbl_crypt;
	g->db_info.moveFrom(dbInfo);
	g->crypt_plugin = p;
	p->addRef();
}

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