email list HMAC digester by their names using a single passkey

hmac_email_digester_keypass

#!/usr/bin/python 
#
import base64
import hmac
import hashlib
import sys,os

mainpass="mysupersecreto"
sitelist = []

digest = hmac.new(mainpass, '', hashlib.sha1)

def digesto_incremental():
  f = open("guestlist.txt", "rb")
	try:
		while True:
			line = f.readline()
			if not line:
				break
			sitelist.append(line)
	finally:
		f.close()
		
def digestar():
	for site in sitelist:
		digest.update(site)
		r = digest.hexdigest()
		print site,":", base64.encodestring(r)

digesto_incremental()
digestar()