Sigurd Meldgaard <[EMAIL PROTECTED]> writes: Thank you for the application, I have a few small comments below :-)
> # HG changeset patch > # User Sigurd Meldgaard <[EMAIL PROTECTED]> > # Date 1220891474 -7200 > # Node ID 87cc366a4c27167b8548214d023d8967271e3d38 > # Parent f879ad687faab381f1208885a5c1330265e3e119 > Added a new application showing how to use the equality library Please put a full-stop at the end of sentences. > diff -r f879ad687faa -r 87cc366a4c27 apps/equality.py > --- /dev/null Thu Jan 01 00:00:00 1970 +0000 > +++ b/apps/equality.py Mon Sep 08 18:31:14 2008 +0200 > @@ -0,0 +1,121 @@ > +#!/usr/bin/python > + > +# Copyright 2008 VIFF Development Team. > +# > +# This file is part of VIFF, the Virtual Ideal Functionality Framework. > +# > +# VIFF is free software: you can redistribute it and/or modify it > +# under the terms of the GNU Lesser General Public License (LGPL) as > +# published by the Free Software Foundation, either version 3 of the > +# License, or (at your option) any later version. > +# > +# VIFF is distributed in the hope that it will be useful, but WITHOUT > +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY > +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General > +# Public License for more details. > +# > +# You should have received a copy of the GNU Lesser General Public > +# License along with VIFF. If not, see <http://www.gnu.org/licenses/>. > +# > + > +""" > +This program is a very simple example of a viff program. Capitalize viff? > +It shows the secret equality testing of two numbers > + > +The program can be run as follows for each player (min 3) where 24 is > +the number we would like to compare: > + > +$ python equality.py player-X.ini -n 24 > + > +Only the numbers of player 1 and player 2 are actually compared, but > +more players are necessary for the security. > +""" > + > +from optparse import OptionParser > +from twisted.internet import reactor > + > +from viff.field import GF > +from viff.runtime import Runtime, create_runtime, make_runtime_class > +from viff.config import load_config > +from viff.util import find_prime > +from viff.equality import ProbabilisticEqualityMixin > + > + > +class Protocol: > + > + def __init__(self, runtime): > + print "connected" > + self.rt = runtime > + > + # Is our player id among the two first? > + if(runtime.id <= 2): > + print "My number: %d." % options.number > + # Players 1 and two are doing a sharing over the field ZP > + # our input is options number > + (x, y) = runtime.shamir_share([1, 2], Zp, options.number) > + else: > + print "I do not have a number." > + (x, y) = runtime.shamir_share([1, 2], Zp, None) > + > + # Do the secret computation > + result = (x == y) > + > + # Now open the result so that we can see it > + result = runtime.open(result) > + > + def finish(e): > + print > + if e == 1: > + print "The two numbers where equal!" > + else: > + print "The two numbers where different!"\ > + " (With high probability)" > + print > + > + > + # When the values for the opening arrive, we can call the > + # finish method. > + result.addCallback(finish) > + result.addCallback(lambda _: runtime.shutdown()) > + > + > +# Parse command line arguments. > +parser = OptionParser(usage=__doc__) > + > +parser.add_option("--modulus", > + help="lower limit for modulus (can be an expression)") > +parser.add_option("-n", "--number", type="int", > + help="number to compare") > +parser.add_option("-t", "--test", default=False, action="store_true", > + help="run doctests on this file") > + > +parser.set_defaults(modulus=2**65) > + > +Runtime.add_options(parser) > + > +options, args = parser.parse_args() > + > +if len(args) == 0: > + parser.error("you must specify a config file") > + > +Zp = GF(find_prime(options.modulus, blum=True)) > + > +# Run doctests > +if options.test: > + import doctest #pragma NO COVER > + doctest.testmod(verbose=True) #pragma NO COVER I don't think there are any doctests here (any longer). > +# Load configuration file. > +id, players = load_config(args[0]) > + > +runtime_class = make_runtime_class(mixins = [ProbabilisticEqualityMixin]) > + > +pre_runtime = create_runtime(id, players, 1, options, > + runtime_class = runtime_class) There should be no spaces around keyword arguments. > +pre_runtime.addCallback(Protocol) > + > +# Uncomment the following line to set the numbers for each player > +# options.number = [None, 12, 18, None][id] > + > +# Start the Twisted event loop. > +reactor.run() -- Martin Geisler VIFF (Virtual Ideal Functionality Framework) brings easy and efficient SMPC (Secure Multi-Party Computation) to Python. See: http://viff.dk/.
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