Ruby way to generate a HMAC-SHA1 signature for OAuth

Question

I\'m writing a small ruby program to play with Twitter over OAuth and have yet to find a right way to do the HMAC-SHA1 signature. So far, I messed around with

Answer 1

def hmac_sha1(data, secret=HOST_KEY)
    require 'base64'
    require 'cgi'
    require 'openssl'
    hmac = OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new('sha1'), secret.encode("ASCII"), data.encode("ASCII"))
    return hmac
end