-
Notifications
You must be signed in to change notification settings - Fork 10
/
CreateGUID.cpp
55 lines (49 loc) · 1.89 KB
/
CreateGUID.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/* Software License Agreement
*
* Copyright(C) 1994-2023 David Lindauer, (LADSoft)
*
* This file is part of the Orange C Compiler package.
*
* The Orange C Compiler package 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, either version 3 of the License, or
* (at your option) any later version.
*
* The Orange C Compiler package 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 Orange C. If not, see <http://www.gnu.org/licenses/>.
*
* contact information:
* email: TouchStone222@runbox.com <David Lindauer>
*
*/
#include <random>
#include <array>
#include <algorithm>
#include <functional>
#include "DotNetPELib.h"
#include "PEFile.h"
void DotNetPELib::PEWriter::CreateGuid(Byte* Guid)
{
std::array<unsigned char, 128 / 8> rnd;
std::uniform_int_distribution<int> distribution(0, 0xff);
// note that this whole thing will fall apart if the C++ lib uses
// a prng with constant seed for the random_device implementation.
// that shouldn't be a problem on OS we are interested in.
std::random_device dev;
std::mt19937 engine(dev());
auto generator = std::bind(distribution, engine);
std::generate(rnd.begin(), rnd.end(), generator);
// make it a valid version 4 (random) GUID
// remember that on windows GUIDs are native endianness so this may need
// work if you port it
rnd[7 /*6*/] &= 0xf;
rnd[7 /*6*/] |= 0x40;
rnd[9 /*8*/] &= 0x3f;
rnd[9 /*8*/] |= 0x80;
memcpy(Guid, rnd.data(), rnd.size());
}