On Mon, Mar 4, 2013 at 11:19 PM, Jeffrey Walton <noloa...@gmail.com> wrote:
> Hi All,
>
> OpenSSL 1.0.1e is not loading Intel's hardware random number
> generator. ENGINE_load_rdrand() silently fails:
>
> /*** eng_rand.c ***/
> void ENGINE_load_rdrand (void)
> {
> extern unsigned int OPENSSL_ia32cap_P[];
>
> if (OPENSSL_ia32cap_P[1] & (1<<(62-32)))
> {
> ENGINE *toadd = ENGINE_rdrand();
> if(!toadd) return;
> ENGINE_add(toadd);
> ENGINE_free(toadd);
> ERR_clear_error();
> }
> }
>
> When I check capabilities:
>
> int rdrand = OPENSSL_ia32cap_P[1] & (1<<(62-32));
> if(rdrand)
> fprintf(stdout, "rdrand is available\n");
> else
> fprintf(stderr, "rdrand is not available\n");
>
> I receive a message that rdrand is not available.
>
> ...
>
> Any ideas?
The [relatively] new MacBook Pro does not support the instruction
(despite what the folks at Apple claim):
$ sysctl hw.optional.rdrand
hw.optional.rdrand: 0
Jeff
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