Ladybird/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-06-09 09:34:57 +09:00
Code Activity

AK: Add windows support in AK/Random

Browse source 
This commit adds support in AK/Random for a high quality RNG on windows.
This requires moving the code into a cpp file not to spread windows
headers around.
This commit is contained in:
R-Goc 2025-04-11 22:14:59 +02:00 • committed by Andrew Kaster
parent d60543c2cb
commit 20662f0dc9
Notes: github-actions[bot] 2025-05-15 13:42:03 +00:00
3 changed files with 57 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

33
AK/Random.h
View file

@ -18,38 +18,7 @@
namespace AK {
inline void fill_with_random([[maybe_unused]] Bytes bytes)
{
#if defined(AK_OS_SERENITY) || defined(AK_OS_ANDROID) || defined(AK_OS_BSD_GENERIC) || defined(AK_OS_HAIKU) || AK_LIBC_GLIBC_PREREQ(2, 36)
arc4random_buf(bytes.data(), bytes.size());
#elif defined(OSS_FUZZ)
#else
auto fill_with_random_fallback = [&]() {
for (auto& byte : bytes)
byte = rand();
};
# if defined(__unix__)
// The maximum permitted value for the getentropy length argument.
static constexpr size_t getentropy_length_limit = 256;
auto iterations = bytes.size() / getentropy_length_limit;
for (size_t i = 0; i < iterations; ++i) {
if (getentropy(bytes.data(), getentropy_length_limit) != 0) {
fill_with_random_fallback();
return;
}
bytes = bytes.slice(getentropy_length_limit);
}
if (bytes.is_empty() || getentropy(bytes.data(), bytes.size()) == 0)
return;
# endif
fill_with_random_fallback();
#endif
}
void fill_with_random([[maybe_unused]] Bytes bytes);
template<typename T>
inline T get_random()