cvs commit: src/sys/libkern arc4random.c
phk at phk.freebsd.dk
Fri Aug 15 12:14:24 PDT 2003
In message <87953260.1060949270 at melange.errno.com>, Sam Leffler writes:
>Note that the data generated by arc4random needs to be exported to user
>apps for seeding crypto operations when operating in a chroot'd environment
>where /dev/random is not available.
I actually thought about that a bit, and I think "/dev/random" is
a wrong concept.
I think we should have a randomdata(2) system call instead.
Having a /dev/random which is sometimes (chroot/jail) means that
applications running under those circumstances are incredible fragile
to spoofing by creating a fake "/dev/random" in some way.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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