| 1 | /* $Id: USBLib.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VirtualBox USB Library, Common Bits.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2022 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 | */
|
|---|
| 53 | USBLIB_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 |
|
|---|
