Re: plperl Safe restrictions

Jon Jensen wrote:

>On Thu, 14 Oct 2004, Andrew Dunstan wrote:
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>>It has just been brought to my attention that we are being very
>>restrictive about what we allow to be done in trusted plperl. Basically
>>we allow the :default and :base_math set of operations (run perldoc
>>Opcode or see http://www.perldoc.com/perl5.8.0/lib/Opcode.html for
>>details of what these mean). In particular, we do not allow calls to
>>perl's builtin sort, which is unpleasant, and on reviewing the list it
>>seems to me we could quite reasonably allow access to pack and unpack
>>also. bless and sprintf are also likely candidates for inclusion - I
>>have not finished reviewing the list, and would welcome advice from perl
>>gurus on this.
>>
>>On the other side, I think we should exclude the :base_io set which is
>>part of the :default set (we don't want trusted plperl writing to
>>stdout, for example - all IO should be forbidden).
>>
>>
>
>That makes sense. Allowing "rand" would be nice too.
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You can now - it's part of :base_math. What we should do, however, is
disallow is calling srand, since pg goes to quite a bit of trouble to
seed the PRNG.

cheers

andrew