Method prepareChangeCryptState

src/jrd/CryptoManager.cpp:544–600

	}

	void CryptoManager::prepareChangeCryptState(thread_db* tdbb, const MetaName& plugName,
		const MetaName& key)
	{
		if (plugName.length() > MAX_PLUGIN_NAME_LEN)
		{
			(Arg::Gds(isc_cp_name_too_long) << Arg::Num(MAX_PLUGIN_NAME_LEN)).raise();
		}

		const bool newCryptState = plugName.hasData();

		int bak_state = Ods::hdr_nbak_unknown;
		{	// scope
			BackupManager::StateReadGuard stateGuard(tdbb);
			bak_state = dbb.dbb_backup_manager->getState();
		}

		{	// window scope
			CchHdr hdr(tdbb, LCK_read);

			// Check header page for flags
			if (hdr->hdr_flags & Ods::hdr_crypt_process)
			{
				(Arg::Gds(isc_cp_process_active)).raise();
			}

			bool headerCryptState = hdr->hdr_flags & Ods::hdr_encrypted;
			if (headerCryptState == newCryptState)
			{
				(Arg::Gds(isc_cp_already_crypted)).raise();
			}

			if (bak_state != Ods::hdr_nbak_normal)
			{
				(Arg::Gds(isc_wish_list) << Arg::Gds(isc_random) <<
					"Cannot crypt: please wait for nbackup completion").raise();
			}

			// Load plugin
			if (newCryptState)
			{
				if (cryptPlugin)
				{
					if (!headerCryptState)
					{
						// unload old plugin
						PluginManagerInterfacePtr()->releasePlugin(cryptPlugin);
						cryptPlugin = NULL;
					}
					else
						Arg::Gds(isc_cp_already_crypted).raise();
				}

				keyName = key;
				loadPlugin(tdbb, plugName.c_str());
			}
		}
	}