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/* $Id: USBLib.cpp $ */
/** @file
* VirtualBox USB Library, Common Bits.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 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, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <VBox/usblib.h>
/**
* Calculate the hash of the serial string.
*
* 64bit FNV1a, chosen because it is designed to hash in to a power of two
* space, and is much quicker and simpler than, say, a half MD4.
*
* @returns the hash.
* @param pszSerial The serial string.
*/
USBLIB_DECL(uint64_t) USBLibHashSerial(const char *pszSerial)
{
if (!pszSerial)
pszSerial = "";
const uint8_t *pu8 = (const uint8_t *)pszSerial;
uint64_t u64 = UINT64_C(14695981039346656037);
for (;;)
{
uint8_t u8 = *pu8;
if (!u8)
break;
u64 = (u64 * UINT64_C(1099511628211)) ^ u8;
pu8++;
}
return u64;
}
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