module Signet::OAuth1::RSASHA1

def self.generate_signature base_string, client_credential_secret, _token_credential_secret
  private_key = OpenSSL::PKey::RSA.new client_credential_secret
  signature = private_key.sign OpenSSL::Digest.new("SHA1"), base_string
  # using strict_encode64 because the encode64 method adds newline characters after ever 60 chars
  Base64.strict_encode64(signature).strip
end