From: Roland Schmitt <Roland.Schmitt@...>
Date: 2005-09-27T20:47:38+09:00
Subject: AW: How do I (really) encrypt a string in ruby?

Hello, 

> -----Urspr�ngliche Nachricht-----
> Von: ruby-talk-admin@ruby-lang.org 
> [mailto:ruby-talk-admin@ruby-lang.org] Im Auftrag von Michal Suchanek
> Gesendet: Dienstag, 27. September 2005 13:09
> An: ruby-talk ML
> Betreff: How do I (really) encrypt a string in ruby?
> 
> Hello
> 
> I find the ruby crypto very confusing. It looks like the 
> methods are dynamically generated, and carry no rdoc 
> documentation that would appear on ruby-doc.
Yes, it is a sad, sad story... 


> I tried to look at the openssl samples supplied with ruby.
> But they only show how to use a high level method which
...

Example:

require "openssl"
include OpenSSL
include Cipher

cipher = Cipher.new("AES-256-CBC")

key = cipher.random_key()
iv = cipher.random_iv()


#---- Encrypt
text = "Hello, World!"
cipher.encrypt(key,iv)
cipher.key=key
cipher.iv = iv
e = cipher.update(text)
e << cipher.final()

puts("Encrypted text: " + e.to_s())

#---- Decrypt
cipher = Cipher.new("AES-256-CBC")
cipher.decrypt(key,iv)
cipher.key = key
cipher.iv = iv
d = cipher.update(e)
d << cipher.final()

puts("Plain text: " + d.to_s())


Hope it helps,
Roland