From: Jamis Buck <jamis@37signals.com>
Date: 2005-08-13T09:10:41+09:00
Subject: Re: "Unsupported cipher algorithm" in OpenSSL

A few more questions to see if we can narrow the scope of the problem:

1) What does the output of "openssl --help" tell you? There should be  
a section at the bottom of the output listing all available cipher  
commands. Are the ones you were requesting available?

2) Are you using a stock build of ruby, or a custom build?

3) What version of OpenSSL do you have installed?

- Jamis

On Aug 12, 2005, at 4:56 PM, Forrest wrote:

> Hello everyone,
>
> Currently, I'm doing my darndest to implement SSL file transfers.   
> Using Net::SSH, I get "`initialize': Unsupported cipher algorithm  
> (aes-128-cbc). (RuntimeError)"  At first I thought this was a  
> problem with the Net::SSH module, but it turns out that my SSL  
> module seems to support no ciphers:
> irb(main):004:0> c=OpenSSL::Cipher::Cipher.new("des-ede-cbc")
> RuntimeError: Unsupported cipher algorithm (des-ede-cbc).
>         from (irb):4:in `initialize'
>         from (irb):4:in `new'
>         from (irb):4
>         from :0
>
> I've tried this with multiple ciphers, to no avail.
>
> Looking at the openssl/cipher.rb, it seems that a few classes are  
> automatically made, but they don't work either:
>
> irb(main):013:0> c=OpenSSL::Cipher::DES.new()
> RuntimeError: Unsupported cipher algorithm (DES).
>         from (eval):5:in `initialize'
>         from (eval):5:in `initialize'
>         from (irb):13:in `new'
>         from (irb):13
>         from :0
>
> For reference:
>
> forrest@apok-2 ~/testcode $ ruby -v
> ruby 1.8.2 (2004-12-25) [x86_64-linux]
>
> forrest@apok-2 ~/testcode $ uname -a
> Linux apok-2 2.6.9-gentoo-r14 #1 SMP Wed Mar 23 09:00:03 EST 2005  
> x86_64 AMD Opteron(tm) Processor 244 AuthenticAMD GNU/Linux
>
> GCC version: gcc version 3.4.3 20041125 (Gentoo 3.4.3-r1,  
> ssp-3.4.3-0, pie-8.7.7)
>
> I've searched high and low; the only remotely informative thing I  
> found was in a thread in May of 2004.  I used the example provided  
> within ( c=OpenSSL::Cipher::Cipher.new("DES") ) and got the same  
> problems.
>
> Does anyone know what's going on here, and/or how to fix it?
>
>
> Thanks,
> -- 
> Forrest
>
>