mariadb/storage/innobase/enc/KeySingleton.cc

/* Copyright (C) 2014 eperi GmbH. All Rights Reserved.

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; version 2 of the License.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

/******************************************************************//**
@file KeySingleton.cc
Implementation of single pattern to keep keys for encrypting/decrypting pages.

Created 09/13/2014
***********************************************************************/


#include "KeySingleton.h"
#include <stdlib.h>
#include <my_aes.h>


bool KeySingleton::instanceInited = false;
KeySingleton KeySingleton::theInstance;
EncKeys KeySingleton::encKeys;



KeySingleton & KeySingleton::getInstance() {
#ifdef UNIV_DEBUG
	if( !instanceInited) {
		fprintf(stderr, "Encryption / decryption keys were not initialized. "
				"You can not read encrypted tables or columns\n");
	}
#endif /* UNIV_DEBUG */
	return theInstance;
}

KeySingleton & KeySingleton::getInstance(const char *name, const char *url,
		const int initType, const char *filekey) {

	if(instanceInited)	return theInstance;
	instanceInited = encKeys.initKeys(name, url, initType, filekey);
	if( !instanceInited) {
		fprintf(stderr, "Could not initialize any of the encryption / decryption keys. "
				"You can not read encrypted tables\n\n");
		fflush(stderr);
	} else {
		my_aes_init_dynamic_encrypt(MY_AES_ALGORITHM_CTR);
	}

	return theInstance;
}

keyentry *KeySingleton::getKeys(int id) {
	return encKeys.getKeys(id);
}

ibool KeySingleton::hasKey(int id) {
	return encKeys.getKeys(id) != NULL;
}