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Re^3: Crypt::CBC and varying the key

by jimbojones (Friar)
on Mar 17, 2006 at 20:14 UTC ( #537554=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Crypt::CBC and varying the key
in thread Crypt::CBC and varying the key

Hi

It looks like you'll have to modify CBC.pm. In my version (2.14), the 'finish' method deletes the current IV.
delete $self->{'civ'}; delete $self->{'buffer'}; return $result; }
You'll have to prevent that from happening, and then add a method to return the current (last) IV, instead of the initial IV
sub get_civ { return $self->{civ}; }
I have no idea if or how this affects the security of the two messages.

Hope this helps, J


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