From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-08-11T22:50:23+09:00
Subject: Re: Cryptographic Signatures: Ruby versus OpenSSL

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This Ruby code will give you the same result:
#--------------------------------------------------
require 'base64'
require 'openssl'
require 'sha1'
include OpenSSL
include PKey
include Digest

pkey = RSA.new(File.read("private.pem"))
plaintext = SHA1.new( "Some Text" ).digest
enc = pkey.private_encrypt(plaintext)
puts Base64.encode64(enc)

#--------------------------------------------------------

as this:

echo -n "Some Text" | openssl dgst -sha1 -binary | openssl rsautl -sign
-inkey private.pem | openssl enc -base64

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