Here's a small trick to deobfuscate code directly from vim, using B::Deparse. All you have to do is to put this in your vimrc:
" Deparse obfuscated code
nnoremap <silent> _d :.!perl -MO=Deparse 2>/dev/null<cr>
vnoremap <silent> _d :!perl -MO=Deparse 2>/dev/null<cr>
Now, whenever you want to deparse a portion of the code, just press _d. For example, this line:
s/\n/-/ if --$|;
I find this particularly useful when I have to work with code that abuses Perl's TIMTOWTDIness:
$foo and $bar or $baz = 1;
(Now imagine a three-lines long statement where the attribution comes at the end.)
Using B::Deparse, the code becomes more legible:
$baz = 1 unless $foo and $bar;
Unfortunatelly, B::Deparse has it own limitations; but I think this technique can be really useful in some situations.
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