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    SubjectRe: [PATCH] ELF: implement AT_RANDOM for future glibc use
    On Mon, Oct 06, 2008 at 09:26:41PM +0200, Andi Kleen wrote:
    > > We're already using get_random* for stack, heap, and brk. Also,
    > > get_random* uses the nonblocking pool, so this is the same as if userspace
    > > had tried to pull bytes out of /dev/urandom, which (as I understand it)
    > Yes exactly that's the problem. Think about it: do you really
    > need the same cryptographic strength for your mmap placement
    > as you need for your SSL session keys?
    > And if you need true entropy for your session keys do you
    > still get it when it was all used for low security
    > purposes first?

    Off-list I was just shown random32(). If AT_RANDOM used that instead,
    would that be acceptable?

    Kees Cook
    Ubuntu Security Team

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      Last update: 2008-10-07 00:11    [W:0.020 / U:7.492 seconds]
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