mac_curl.rb

require 'uri'
require 'optparse'
require 'securerandom'
require 'openssl'

opt = OptionParser.new

token = ENV['MAC_TOKEN']
secret = ENV['MAC_SECRET']
method = 'GET'

opt.on('--token token') {|v| token = v }
opt.on('--secret secret') {|v| secret = v }
opt.on('-X method', '--request method') {|v| method = v.upcase}

opt.parse!(ARGV)

uri = URI.parse(ARGV.last)
ts = Time.now.to_i.to_s
nonce = SecureRandom.base64(8)

request_uri = uri.path
request_uri += '?' + uri.query unless uri.query.nil?

data = [ts, nonce, method, request_uri, uri.host, uri.port.to_s, '', nil].join("\n")
p data
mac = [OpenSSL::HMAC.digest('sha256', secret, data)].pack('m0')

header = "Authorization: MAC id=\"#{token}\", nonce=\"#{nonce}\", ts=\"#{ts}\", mac=\"#{mac}\""

puts header

system('curl', '-X', method, '-H', header, *ARGV)