Handling over sized keys on OpenSSL
| From: | Leo Cavalcante | Date: | Sun, 01 Sep 2019 03:33:59 +0000 |
| Subject: | Handling over sized keys on OpenSSL | ||
| Groups: | php.internals | ||
| Request: | Send a blank email to internals+get-106827@lists.php.net to get a copy of this message | ||
Hi Internals,
I just spent this entire Saturday debugging a code to discover that OpenSSL
truncates over sized keys.
Yeah, I was using a 256-bit length key with AES-128-CBC then trying to
decrypt it in another program never works.
Did some research I found that Ruby did it a few years ago
<https://github.com/ruby/ruby/commit/ce635262f53b760284d56bb1027baebaaec175d1?fbclid=IwAR2W3mJEljXwedq4VkhWjkXO0fsiEliORsuPSN2YqOAhkZk1fGfC3CqkPaU>
.
And in fact, its better to throw or even warn/notice about it instead of
silently allowing it, *what you think?*
Regards,
Leo