Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

doc: crypto.randomBytes does not block when async #14993

Merged
merged 1 commit into from
Aug 25, 2017
Merged

doc: crypto.randomBytes does not block when async #14993

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion doc/api/crypto.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1717,7 +1717,8 @@ console.log(
`${buf.length} bytes of random data: ${buf.toString('hex')}`);
```

The `crypto.randomBytes()` method will block until there is sufficient entropy.
The `crypto.randomBytes()` method will not complete until there is
Copy link
Contributor

@mscdex mscdex Aug 23, 2017 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Isn't this only the case for the async version of this function (e.g. when a callback is passed)? How does it not block when the sync version is invoked and there is not sufficient entropy at that time? I think we should be explicit here about this difference.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Its the case for both versions. If its sync, it won't complete. If it's async, it won't complete. Can you suggest some other wording? I think the current wording applies equally to both, and the previous wording applied only to the sync version.

sufficient entropy available.
This should normally never take longer than a few milliseconds. The only time
when generating the random bytes may conceivably block for a longer period of
time is right after boot, when the whole system is still low on entropy.
Expand Down