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authorTheo de Raadt <deraadt@cvs.openbsd.org>2014-07-17 23:12:29 +0000
committerTheo de Raadt <deraadt@cvs.openbsd.org>2014-07-17 23:12:29 +0000
commite3e55c80105ba83ae5311cebee969f0512e9a442 (patch)
tree65ec0a32f31c2199e02501241116e010856d7918 /lib/libc
parentfbd0315bac1b7a34f5c61085250dbff37ee452b9 (diff)
it is 2014, and we still need to encourage people away from srand()
and random(). Sigh.
Diffstat (limited to 'lib/libc')
-rw-r--r--lib/libc/stdlib/rand.39
-rw-r--r--lib/libc/stdlib/random.310
2 files changed, 14 insertions, 5 deletions
diff --git a/lib/libc/stdlib/rand.3 b/lib/libc/stdlib/rand.3
index 75395976f8f..be5481bb931 100644
--- a/lib/libc/stdlib/rand.3
+++ b/lib/libc/stdlib/rand.3
@@ -29,9 +29,9 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $OpenBSD: rand.3,v 1.15 2014/04/07 17:57:56 schwarze Exp $
+.\" $OpenBSD: rand.3,v 1.16 2014/07/17 23:12:28 deraadt Exp $
.\"
-.Dd $Mdocdate: April 7 2014 $
+.Dd $Mdocdate: July 17 2014 $
.Dt RAND 3
.Os
.Sh NAME
@@ -50,7 +50,10 @@
.Sh DESCRIPTION
.Bf -symbolic
These interfaces are obsoleted by
-.Xr random 3 .
+.Xr random 3 ,
+which is also unsafe.
+Consider using
+.Xr arc4random 3 .
.Ef
.Pp
The
diff --git a/lib/libc/stdlib/random.3 b/lib/libc/stdlib/random.3
index 2bac41796ed..1223745cb47 100644
--- a/lib/libc/stdlib/random.3
+++ b/lib/libc/stdlib/random.3
@@ -25,9 +25,9 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $OpenBSD: random.3,v 1.23 2014/07/13 14:25:00 tedu Exp $
+.\" $OpenBSD: random.3,v 1.24 2014/07/17 23:12:28 deraadt Exp $
.\"
-.Dd $Mdocdate: July 13 2014 $
+.Dd $Mdocdate: July 17 2014 $
.Dt RANDOM 3
.Os
.Sh NAME
@@ -50,6 +50,12 @@
.Ft char *
.Fn setstate "char *state"
.Sh DESCRIPTION
+.Bf -symbolic
+This interface is not cryptographically secure, so consider using
+.Xr arc4random 3
+instead.
+.Ef
+.Pp
The
.Fn random
function uses a non-linear additive feedback random number generator employing