alecguintu

def verify_response(response, response_signature)
  public_key_pem = File.read(Rails.root.join('config', 'gcash-public-key2.pem'))

  public_key = OpenSSL::PKey::RSA.new(public_key_pem)

  signature_dest = Base64.strict_decode64(response_signature)

  public_key.verify(OpenSSL::Digest::SHA256.new, signature_dest, response.to_json)
end