Make a unique filesystem path, without creating the file
marko at pacujo.net
Mon Feb 22 16:22:24 EST 2016
Paul Rubin <no.email at nospam.invalid>:
>> Did you post the link because you agreed with the Web pamphlet?
> I don't know what web pamphlet you mean,
The only one linked above.
Cryptography is tricky business, indeed. I know enough about it not to
improvise too much. Infinitesimal weaknesses can make a difference
between feasible and unfeasible attacks.
> but the right thing to use now is getrandom(2).
getrandom(2) is a good interface that distinguishes between the flag
0 => /dev/urandom
GRND_RANDOM => /dev/random
GRND_RANDOM | GRND_NONBLOCK => /dev/random (O_NONBLOCK)
However, although os.urandom() delegates to getrandom(), the
documentation suggests it uses the flag value 0 (/dev/urandom).
> The random/urandom interface was poorly designed and misleadingly
It could be better I suppose, but I never found it particularly bad. The
nice thing about it is that it is readily usable in shell scripts.
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