Ejemplo n.º 1
0
 def probe(i):
     if len(encCounter[i]) >= ENC_THRESHOLD and receivedProposals and not locks[i].full() and not doneCombination[i]:  # by == this part only executes once.
         oriM = encPK.combine_shares(deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]),
                                     dict(itertools.islice(encCounter[i].iteritems(), ENC_THRESHOLD))
                                     )
         doneCombination[i] = True
         locks[i].put(oriM)
Ejemplo n.º 2
0
 def probe(i):
     if len(encCounter[i]) >= ENC_THRESHOLD and receivedProposals and not locks[i].full() and not doneCombination[i]:  # by == this part only executes once.
         oriM = encPK.combine_shares(deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]),
                                     dict(itertools.islice(encCounter[i].iteritems(), ENC_THRESHOLD))
                                     )
         doneCombination[i] = True
         locks[i].put(oriM)
Ejemplo n.º 3
0
def honestParty(pid, N, t, controlChannel, broadcast, receive, send, B=-1):
    # RequestChannel is called by the client and it is the client's duty to broadcast the tx it wants to include
    if B < 0:
        B = int(math.ceil(N * math.log(N)))
    transactionCache = []
    finishedTx = set()
    proposals = []
    receivedProposals = False
    commonSet = []
    locks = defaultdict(lambda: Queue(1))
    doneCombination = defaultdict(lambda: False)
    ENC_THRESHOLD = N - 2 * t
    global finishcount
    encPK, encSKs = getEncKeys()
    encCounter = defaultdict(lambda: {})
    includeTransactionChannel = Queue()

    def probe(i):
        if len(
                encCounter[i]
        ) >= ENC_THRESHOLD and receivedProposals and not locks[i].full(
        ) and not doneCombination[i]:  # by == this part only executes once.
            oriM = encPK.combine_shares(
                deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]),
                dict(itertools.islice(encCounter[i].iteritems(),
                                      ENC_THRESHOLD)))
            doneCombination[i] = True
            locks[i].put(oriM)

    def listener():
        while True:
            sender, msgBundle = receive()
            if msgBundle[0] == 'O':
                encCounter[msgBundle[1]][sender] = msgBundle[2]
                probe(msgBundle[1])
            else:
                includeTransactionChannel.put(
                    (sender, msgBundle))  # redirect to includeTransaction

    Greenlet(listener).start()

    while True:
        op, msg = controlChannel.get()
        if op == "IncludeTransaction":
            if isinstance(msg, Transaction):
                # transactionCache.add(msg)
                transactionCache.append(msg)
            elif isinstance(msg, set):
                for tx in msg:
                    transactionCache.append(tx)
            elif isinstance(msg, list):
                transactionCache.extend(msg)
        elif op == "Halt":
            break
        elif op == "Msg":
            broadcast(eval(msg))  # now the msg is something we mannually send
        mylog("timestampB (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
        if len(transactionCache) < B:  # Let's wait for many transactions. : )
            time.sleep(0.5)
            print "Not enough transactions", len(transactionCache)
            continue

        oldest_B = transactionCache[:B]
        selected_B = random.sample(oldest_B, min(B / N, len(oldest_B)))
        print "[%d] proposing %d transactions" % (pid, min(
            B / N, len(oldest_B)))
        aesKey = random._urandom(32)  #
        encrypted_B = encrypt(aesKey, ''.join(selected_B))
        encryptedAESKey = encPK.encrypt(aesKey)
        proposal = serializeEnc(encryptedAESKey) + encrypted_B
        mylog("timestampIB (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
        commonSet, proposals = includeTransaction(
            pid, N, t, proposal, broadcast, includeTransactionChannel.get,
            send)
        mylog("timestampIE (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
        receivedProposals = True
        for i in range(N):
            probe(i)
        for i, c in enumerate(commonSet):  # stx is the same for every party
            if c:
                share = encSKs[pid].decrypt_share(
                    deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]))
                broadcast(('O', i, share))
        mylog("timestampIE2 (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
        recoveredSyncedTxList = []

        def prepareTx(i):
            rec = locks[i].get()
            encodedTxSet = decrypt(rec, proposals[i][ENC_SERIALIZED_LENGTH:])
            assert len(encodedTxSet) % TR_SIZE == 0
            recoveredSyncedTx = [
                encodedTxSet[i:i + TR_SIZE]
                for i in range(0, len(encodedTxSet), TR_SIZE)
            ]
            recoveredSyncedTxList.append(recoveredSyncedTx)

        thList = []
        for i, c in enumerate(commonSet):  # stx is the same for every party
            if c:
                s = Greenlet(prepareTx, i)
                thList.append(s)
                s.start()
        gevent.joinall(thList)
        mylog("timestampE (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
        for rtx in recoveredSyncedTxList:
            finishedTx.update(set(rtx))

        mylog("[%d] %d distinct tx synced and %d tx left in the pool." %
              (pid, len(finishedTx), len(transactionCache) - len(finishedTx)),
              verboseLevel=-2)
        lock.get()
        finishcount += 1
        lock.put(1)
        if finishcount >= N - t:  # convenient for local experiments
            sys.exit()
    mylog("[%d] Now halting..." % (pid))
Ejemplo n.º 4
0
def honestParty(pid, N, t, controlChannel, broadcast, receive, send, B = -1):
    # RequestChannel is called by the client and it is the client's duty to broadcast the tx it wants to include
    if B < 0:
        B = int(math.ceil(N * math.log(N)))
    transactionCache = []
    finishedTx = set()
    proposals = []
    receivedProposals = False
    commonSet = []
    locks = defaultdict(lambda : Queue(1))
    doneCombination = defaultdict(lambda : False)
    ENC_THRESHOLD = N - 2 * t
    global finishcount
    encPK, encSKs = getEncKeys()
    encCounter = defaultdict(lambda : {})
    includeTransactionChannel = Queue()

    def probe(i):
        if len(encCounter[i]) >= ENC_THRESHOLD and receivedProposals and not locks[i].full() and not doneCombination[i]:  # by == this part only executes once.
            oriM = encPK.combine_shares(deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]),
                                        dict(itertools.islice(encCounter[i].iteritems(), ENC_THRESHOLD))
                                        )
            doneCombination[i] = True
            locks[i].put(oriM)

    def listener():
        while True:
            sender, msgBundle = receive()
            if msgBundle[0] == 'O':
                encCounter[msgBundle[1]][sender] = msgBundle[2]
                probe(msgBundle[1])
            else:
                includeTransactionChannel.put((sender, msgBundle))  # redirect to includeTransaction

    Greenlet(listener).start()

    while True:
            op, msg = controlChannel.get()
            if op == "IncludeTransaction":
                if isinstance(msg, Transaction):
                    # transactionCache.add(msg)
                    transactionCache.append(msg)
                elif isinstance(msg, set):
                    for tx in msg:
                        transactionCache.append(tx)
                elif isinstance(msg, list):
                    transactionCache.extend(msg)
            elif op == "Halt":
                break
            elif op == "Msg":
                broadcast(eval(msg))  # now the msg is something we mannually send
            mylog("timestampB (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
            if len(transactionCache) < B:  # Let's wait for many transactions. : )
                time.sleep(0.5)
                print "Not enough transactions", len(transactionCache)
                continue

            oldest_B = transactionCache[:B]
            selected_B = random.sample(oldest_B, min(B/N, len(oldest_B)))
            print "[%d] proposing %d transactions" % (pid, min(B/N, len(oldest_B)))
            aesKey = random._urandom(32)  #
            encrypted_B = encrypt(aesKey, ''.join(selected_B))
            encryptedAESKey = encPK.encrypt(aesKey)
            proposal = serializeEnc(encryptedAESKey) + encrypted_B
            mylog("timestampIB (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
            commonSet, proposals = includeTransaction(pid, N, t, proposal, broadcast, includeTransactionChannel.get, send)
            mylog("timestampIE (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
            receivedProposals = True
            for i in range(N):
                probe(i)
            for i, c in enumerate(commonSet):  # stx is the same for every party
                if c:
                    share = encSKs[pid].decrypt_share(deserializeEnc(proposals[i][:ENC_SERIALIZED_LENGTH]))
                    broadcast(('O', i, share))
            mylog("timestampIE2 (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
            recoveredSyncedTxList = []
            def prepareTx(i):
                rec = locks[i].get()
                encodedTxSet = decrypt(rec, proposals[i][ENC_SERIALIZED_LENGTH:])
                assert len(encodedTxSet) % TR_SIZE == 0
                recoveredSyncedTx = [encodedTxSet[i:i+TR_SIZE] for i in range(0, len(encodedTxSet), TR_SIZE)]
                recoveredSyncedTxList.append(recoveredSyncedTx)
            thList = []
            for i, c in enumerate(commonSet):  # stx is the same for every party
                if c:
                    s = Greenlet(prepareTx, i)
                    thList.append(s)
                    s.start()
            gevent.joinall(thList)
            mylog("timestampE (%d, %lf)" % (pid, time.time()), verboseLevel=-2)
            for rtx in recoveredSyncedTxList:
                finishedTx.update(set(rtx))

            mylog("[%d] %d distinct tx synced and %d tx left in the pool." % (pid, len(finishedTx), len(transactionCache) - len(finishedTx)), verboseLevel=-2)
            lock.get()
            finishcount += 1
            lock.put(1)
            if finishcount >= N - t:  # convenient for local experiments
                sys.exit()
    mylog("[%d] Now halting..." % (pid))