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std/os/index.zig: swap CryptGetRandom() with RtlGenRandom();

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Tracking Issue #1318 ;
This commit is contained in:
kristopher tate 2018-08-03 02:14:52 +09:00
parent 22fd359e2c
commit c44653f40f
1 changed files with 4 additions and 10 deletions
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14
std/os/index.zig
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@ -130,16 +130,10 @@ pub fn getRandomBytes(buf: []u8) !void {
try posixRead(fd, buf); try posixRead(fd, buf);
}, },
Os.windows => { Os.windows => {
var hCryptProv: windows.HCRYPTPROV = undefined; // Call RtlGenRandom() instead of CryptGetRandom() on Windows
if (windows.CryptAcquireContextA(&hCryptProv, null, null, windows.PROV_RSA_FULL, 0) == 0) { // https://github.com/rust-lang-nursery/rand/issues/111
const err = windows.GetLastError(); // https://bugzilla.mozilla.org/show_bug.cgi?id=504270
return switch (err) { if (!windows.RtlGenRandom(buf.ptr, buf.len)) {
else => unexpectedErrorWindows(err),
};
}
defer _ = windows.CryptReleaseContext(hCryptProv, 0);
if (windows.CryptGenRandom(hCryptProv, @intCast(windows.DWORD, buf.len), buf.ptr) == 0) {
const err = windows.GetLastError(); const err = windows.GetLastError();
return switch (err) { return switch (err) {
else => unexpectedErrorWindows(err), else => unexpectedErrorWindows(err),