diff options
| author |   djm <djm@openbsd.org> | 2008-03-02 21:29:06 +0000 |
|---|---|---|
| committer | djm <djm@openbsd.org> | 2008-03-02 21:29:06 +0000 |
| commit | 75eb879db294a00ed42d2baec9891df994afd113 (patch) | |
| tree | 5cf89d9e0b1f5d34b41ce012d1d88991f6b83886 /sys/dev/rndvar.h | |
| parent | Keep resolv.conf.shadow around when restarting an install. This (diff) | |
| download | wireguard-openbsd-75eb879db294a00ed42d2baec9891df994afd113.tar.xz wireguard-openbsd-75eb879db294a00ed42d2baec9891df994afd113.zip | |
Add a arc4random_uniform() that returns a uniformly distributed number
in the range 0 <= x < upper_bound
Please use this new API instead of "arc4random() % upper_bound", as it
avoids the "modulo bias" that favours small results when upper_bound is
not a power of two.
feedback deraadt@ mcbride@; ok deraadt@
Diffstat (limited to 'sys/dev/rndvar.h')
| -rw-r--r-- | sys/dev/rndvar.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/rndvar.h b/sys/dev/rndvar.h index 60305d48fa6..c6831502c0b 100644 --- a/sys/dev/rndvar.h +++ b/sys/dev/rndvar.h @@ -1,4 +1,4 @@ -/* $OpenBSD: rndvar.h,v 1.19 2003/11/03 18:24:28 tedu Exp $ */ +/* $OpenBSD: rndvar.h,v 1.20 2008/03/02 21:29:07 djm Exp $ */ /* * Copyright (c) 1996,2000 Michael Shalayeff. @@ -87,6 +87,7 @@ void enqueue_randomness(int, int); void get_random_bytes(void *, size_t); void arc4random_bytes(void *, size_t); u_int32_t arc4random(void); +u_int32_t arc4random_uniform(u_int32_t); #endif /* _KERNEL */ |