From: Christopher Brown <cbrown@...>
Date: 2006-10-16T02:26:02+09:00
Subject: Re: Encrypt large files with ruby openssl or ????

You can certainly do something like the following for any size  
document, streaming it in as you go:

#!/usr/bin/env ruby

require 'openssl'

key = "1234567890123456"
alg = "AES-128-CBC"
iv = "6543210987654321"

aes = OpenSSL::Cipher::Cipher.new(alg)
aes.encrypt
aes.key = key
aes.iv = iv

File.open("foo.enc",'w') do |enc|

   File.open("foo") do |f|
     loop do
       r = f.read(4096)
       break unless r
       cipher = aes.update(r)
       enc << cipher
     end
   end

   enc << aes.final
end

Cheers,
Chris

On 15 Oct 2006, at 3:02 PM, Damjan Rems wrote:

>
> It looks like ruby openssl is not intended to encrypt large amount of
> data (like XML documents) because of:
>
> `private_encrypt': data too large for key size  
> (OpenSSL::PKey::RSAError)
>
> Since there obvious are tools which do the job my question is. Can and
> how it be done with ruby?
>
>
> Thank you
>
> TheR
>
> -- 
> Posted via http://www.ruby-forum.com/.
>