From: Alan Fritz <Alan.Fritz@...>
Date: 2006-04-21T03:40:06+09:00
Subject: Re: RSA Encryption Decryption

Shannon,

Your code expects HEX.
How are you generating keys in a hex format?

Thanks,
-Alan

-----Original Message-----
From: Shannon Fang [mailto:xrfang@hotmail.com]
Sent: Thursday, April 20, 2006 8:46 AM
To: ruby-talk ML; namepipe@gmail.com
Cc: ruby-talk@ruby-lang.org
Subject: Re: RSA Encryption Decryption

I am sorry that I do not know the "PEM" format. However, it is very easy to
use OpenSSL to generate a code for my program. Under Linux command line, you
run this command:

openssl genrsa 2048 | openssl rsa -text -noout

In the output you will see modulus, private key and public key. Remove all
the ":" between it, make these a very huge Integer. You are done. If you
like, you may write a program to do this too.

Hope this helps. Crypto-Experts, welcome to comment on this piece of code,
is it important to use "PEM"?

Thanks,
Shannon

>From: "name pipe" <namepipe@gmail.com>
>To: xrfang@hotmail.com
>Subject: Re: RSA Encryption Decryption
>Date: Wed, 19 Apr 2006 18:38:00 +0530
>
>Hi Shannon,
>
>Your code was helpful. Thanks.
>Only problem is that the pub/private keys you used in the code are not in
>PEM format. How can we generate keys in the format you have used in the
>code. Also I need to make a 32 bit key. How can I do that ?
>
>Thanks.
>
>
>On 4/18/06, Shannon Fang <xrfang@hotmail.com> wrote:
> >
> > Try mine :) You may use OpenSSL to generate key and use this program to
>do
> > rsa. It's speed is quite ok for 2048 bit encryption.
> >
> > Shannon
> >
> >
> > >From: "name pipe" <namepipe@gmail.com>
> > >Reply-To: ruby-talk@ruby-lang.org
> > >To: ruby-talk@ruby-lang.org (ruby-talk ML)
> > >Subject: Re: RSA Encryption Decryption
> > >Date: Tue, 18 Apr 2006 18:34:18 +0900
> > >
> > >Thanks,  but its bit confusing with new include files and stuff. Any
> > simple
> > >eg. which creates RSA public, private keys and encrypts/decrypts data ?
> > >
> > >
> > >On 4/18/06, Roland Schmitt <Roland.Schmitt@web.de> wrote:
> > > >
> > > > Hi,
> > > >
> > > >
> > > > name pipe wrote:
> > > > > Hi,
> > > > >
> > > > > I would like to know how can we do encryption and decryption using
> > > > public
> > > > > and private keys in ruby. Does ruby any RSA libraries for the
>same.
> > A
> > > > small
> > > > > example would be quite helpful.
> > > > >
> > > > > Thanks
> > > > >
> > > >
> > > > take a look at the openssl bindings for ruby:
> > > >
> > > > require "openssl"
> > > > include OpenSSL
> > > > include X509
> > > > include PKey
> > > >
> > > > cert = Certificate.new(File.read("server.cer"))
> > > > private_key = RSA.new(File.read("server.cer.key"))
> > > > message = "This is a test!"
> > > >
> > > > puts("--- Start private key encryption / public key decryption")
> > > > crypt = private_key.private_encrypt(message)
> > > > puts("Plain text ---------")
> > > > puts(message)
> > > > puts("Encrypted text------")
> > > > puts(crypt)
> > > > puts("Decryted text-------")
> > > > puts(cert.public_key.public_decrypt(crypt))
> > > >
> > > > puts("--- Start public key encryption / private key decryption")
> > > > crypt = cert.public_key.public_encrypt(message)
> > > > puts("Encrypted text------")
> > > > puts(crypt)
> > > > puts("Decryted text-------")
> > > > puts(private_key.private_decrypt(crypt))
> > > >
> > > >
> > > >
> > > > Regards,
> > > > Roland
> > > >
> > > >
> >
> >
> >
> >