VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/VBoxUSB/USBLib.cpp@ 104448

Last change on this file since 104448 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.4 KB
Line 
1/* $Id: USBLib.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VirtualBox USB Library, Common Bits.
4 */
5
6/*
7 * Copyright (C) 2006-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include <VBox/usblib.h>
42
43
44/**
45 * Calculate the hash of the serial string.
46 *
47 * 64bit FNV1a, chosen because it is designed to hash in to a power of two
48 * space, and is much quicker and simpler than, say, a half MD4.
49 *
50 * @returns the hash.
51 * @param pszSerial The serial string.
52 */
53USBLIB_DECL(uint64_t) USBLibHashSerial(const char *pszSerial)
54{
55 if (!pszSerial)
56 pszSerial = "";
57
58 const uint8_t *pu8 = (const uint8_t *)pszSerial;
59 uint64_t u64 = UINT64_C(14695981039346656037);
60 for (;;)
61 {
62 uint8_t u8 = *pu8;
63 if (!u8)
64 break;
65 u64 = (u64 * UINT64_C(1099511628211)) ^ u8;
66 pu8++;
67 }
68
69 return u64;
70}
71
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