From: "Aaron D. Gifford" <astounding@...>
Date: 2010-04-21T07:33:54+09:00
Subject: Re: AES decrypt without PKCS padding?

On Tue, Apr 20, 2010 at 4:46 AM, Brian Candler <b.candler@pobox.com> wrote:
...
> I think the equivalent in Ruby is this:
>
>>> OpenSSL::Cipher::AES.instance_methods.grep(/pad/i)
> => ["padding="]


Thank you, that was exactly what I needed and it works perfectly for my data:

def decrypt_aes_256_cbc(key, iv, ciphertext)
  aes = OpenSSL::Cipher::AES.NEW('256-CBC')
  aes.decrypt
  aes.padding = 0
  aes.key = key
  aes.iv = iv
  aes.update(ciphertext) + aes.final
end

Aaron out.