/
utils.py
387 lines (314 loc) · 10.6 KB
/
utils.py
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__author__ = 'aluex'
from gevent import monkey
monkey.patch_all()
import sys
from gevent.queue import Queue
from gevent import Greenlet
import random
import hashlib
import gc
import traceback
import cPickle as pickle
from io import BytesIO
import struct
import gmpy2
from ecdsa_ssl import KEY
nameList = open('names.txt','r').read().strip().split('\n')
# nameList = ["Alice", "Bob", "Christina", "David", "Eco", "Francis", "Gerald", "Harris", "Ive", "Jessica"]
TR_SIZE = 250
verbose = -2
goodseed = random.randint(1, 10000)
myRandom = random.Random(goodseed)
signatureCost = 0
def callBackWrap(func, callback):
def _callBackWrap(*args, **kargs):
result = func(*args, **kargs)
callback(result)
return _callBackWrap
PK, SKs = None, None
ecdsa_key_list = []
from Crypto.Hash import SHA256
sha1hash = lambda x: SHA256.new(x).digest()
import sys
import os
sys.path.append(os.path.abspath('../commoncoin'))
import shoup
class Transaction: # assume amout is in term of short
def __init__(self):
self.source='Unknown'
self.target = 'Unknown'
self.amount = 0
#### TODO: Define a detailed transaction
def __repr__(self):
return bcolors.OKBLUE + "{{Transaction from %s to %s with %d}}" % (self.source, self.target, self.amount) + bcolors.ENDC
def __eq__(self, other):
if isinstance(other, self.__class__):
return self.source == other.source and self.target == other.target and self.amount == other.amount
return False
def __ne__(self, other):
return not self.__eq__(other)
def __hash__(self):
return hash(self.source) ^ hash(self.target) ^ hash(self.amount)
#def getBitsRepr(self):
# return struct.pack('BBH', int(self.source.encode('hex'), 16) & 255, int(self.target.encode('hex'), 16) & 255,
# self.amount)
def randomTransaction():
tx = Transaction()
tx.source = random.choice(nameList)
tx.target = random.choice(nameList)
tx.amount = random.randint(1, 32767) # not 0
return tx
def randomTransactionStr():
return repr(randomTransaction())
class deepEncodeException(Exception):
pass
class deepDecodeException(Exception):
pass
class finishTransactionLeap(Exception):
pass
# assumptions: amount of the money transferred can be expressed in 2 bytes.
def encodeTransaction(tr):
sourceInd = nameList.index(tr.source)
targetInd = nameList.index(tr.target)
return struct.pack(
'<BBH', sourceInd, targetInd, tr.amount
) + ''.join([chr(random.randint(1, 255)) for i in range(TR_SIZE - 4)]) # padding
# assumptions:
# + mc can be expressed in 4 bytes.
# + party index can be expressed in 1 byte.
# + round index can be expressed in 2 bytes.
# + transactions with ammount > 0 [THIS IS IMPORTANT for separation]
# + transaction set fragments is less than 2^32 bytes
def deepEncode(mc, m):
buf = BytesIO()
buf.write(struct.pack('<I', mc))
f, t, (tag, c) = m
buf.write(struct.pack('BB', f, t))
# totally we have 4 msg types
if c[0]=='i':
buf.write('\x01')
t2, p1, s, sig = c
buf.write(struct.pack('B', p1))
for tr in s:
buf.write(encodeTransaction(tr))
buf.write('\x00'*4)
buf.write(sig)
elif c[0]=='e':
buf.write('\x02')
t2, p1, (p2, s), sig = c
buf.write(struct.pack('BB', p1, p2))
buf.write(struct.pack('<I', len(s)))
buf.write(s) ## here we already have them encoded
# for tr in s:
# buf.write(encodeTransaction(tr))
# buf.write('\x00'*4)
buf.write(sig)
elif c[0]=='r':
buf.write('\x06')
t2, p1, hm = c
buf.write(struct.pack('B', p1))
buf.write(hm)
else:
p1, (t2, m2) = c
if t2 == 'B':
buf.write('\x03')
elif t2 == 'A':
buf.write('\x04')
elif t2 == 'C':
buf.write('\x05')
r, sig = m2
buf.write(struct.pack('<BH', p1, r) + gmpy2.to_binary(sig)[2:])
buf.seek(0)
return buf.read()
else:
raise deepEncodeException()
(p2, p3) = m2
buf.write(struct.pack('BBB', p1, p2, p3))
buf.seek(0)
return buf.read()
def constructTransactionFromRepr(r):
sourceInd, targetInd, amount = struct.unpack('<BBH', r[:4])
tr = Transaction()
tr.source = nameList[sourceInd]
tr.target = nameList[targetInd]
tr.amount = amount
return tr
# Msg Types:
# 1':(0, 0, ('B', ('i', 0, set([{{Transaction from Alice to Gerald with 22}}]),
# '0E\x02 T\xf3\x05\xdc\xc6\xd8\x02\xa3\xb3D\xb4\xba\xe3\xd7<\xb1z\xb2\x9c/\x1a\xfdB\x9cZj\xe6\xbc\x9e\x16\x85\x05\x02!\x00\xd5\xee\xa2\xf1\xe7-\xbe\xb9\xefE\x8d\x12\xc4*\xe4D\x96\xa7\xa5\xbe\x13\xaa\x87\x93\x94c\xc4et\xa5\x1a\xc4')))
# 1:(3, 1, ('B', ('i', 1, set([{{Transaction from Francis to Eco with 86}}]))))
# 2:(1, 0, ('B', ('e', 0, (2, set([{{Transaction from Bob to Jessica with 65}}])))))
# 3:(0, 3, ('A', (1, ('B', (1, 1)))))
# 4:(0, 3, ('A', (2, ('A', (1, 1)))))
# 5:(3, 0, ('A', (0, ('C', (1, mpz(340L))))))
# 6:(3, 0, ('B', ('r', 0, 'asdasd')))
def deepDecode(m, msgTypeCounter):
buf = BytesIO(m)
mc, f, t, msgtype = struct.unpack('<IBBB', buf.read(7))
trSet = set()
msgTypeCounter[msgtype] += len(m)
if msgtype == 1:
p1, = struct.unpack('B', buf.read(1))
trRepr = buf.read(TR_SIZE)
while not '\x00'*4 in trRepr:
trSet.add(constructTransactionFromRepr(trRepr))
trRepr = buf.read(TR_SIZE)
sig = buf.read()
return mc, (f, t, ('B', ('i', p1, trSet, sig)),)
elif msgtype == 2:
p1, p2 = struct.unpack('BB', buf.read(2))
trSetLen = struct.unpack('<I', buf.read(4))[0]
trSet = buf.read(trSetLen)
# trRepr = buf.read(4)
# while trRepr != '\x00'*4:
# trSet.add(constructTransactionFromRepr(trRepr))
# trRepr = buf.read(4)
sig = buf.read()
return mc, (f, t, ('B', ('e', p1, (p2, trSet), sig)),)
elif msgtype == 3:
p1, p2, p3 = struct.unpack('BBB', buf.read(3))
return mc, (f, t, ('A', (p1, ('B', (p2, p3)))),)
elif msgtype == 4:
p1, p2, p3 = struct.unpack('BBB', buf.read(3))
return mc, (f, t, ('A', (p1, ('A', (p2, p3)))),)
elif msgtype == 5:
p1, r = struct.unpack('<BH', buf.read(3))
sig = gmpy2.from_binary('\x01\x01'+buf.read())
return mc, (f, t, ('A', (p1, ('C', (r, sig)))))
elif msgtype == 6:
p1, = struct.unpack('B', buf.read(1))
hm = buf.read()
return mc, (f, t, ('B', ('r', p1, hm)))
else:
raise deepDecodeException()
def initiateThresholdSig(contents):
global PK, SKs
PK, SKs = pickle.loads(contents)
#print PK
#print SKs
def initiateECDSAKeys(contents):
global ecdsa_key_list
ecdsa_key_list = []
ecdsa_sec_list = pickle.loads(contents)
for secret in ecdsa_sec_list:
k = KEY()
k.generate(secret)
k.set_compressed(True)
ecdsa_key_list.append(k)
def setHash(s):
result = 0
for ele in s:
result ^= hash(ele)
return result
def getKeys():
return PK, SKs
def getECDSAKeys():
return ecdsa_key_list
class bcolors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
def mylog(*args, **kargs):
if not 'verboseLevel' in kargs:
kargs['verboseLevel'] = 0
if kargs['verboseLevel'] <= verbose:
print " ".join([isinstance(arg, str) and arg or repr(arg) for arg in args])
sys.stdout.flush()
sys.stderr.flush()
def joinQueues(a, b):
# Return an element from either a or b
q = Queue(1)
def _handle(chan):
chan.peek()
q.put(chan)
Greenlet(_handle, a).start()
Greenlet(_handle, b).start()
c = q.get()
if c is a: return 'a', a.get()
if c is b: return 'b', b.get()
# Returns an idempotent function that only
def makeCallOnce(callback, *args, **kargs):
called = [False]
def callOnce():
if called[0]: return
called[0] = True
callback(*args, **kargs)
return callOnce
def makeBroadcastWithTag(tag, broadcast):
def _bc(m):
broadcast(
(tag, m)
)
return _bc
def makeBroadcastWithTagAndRound(tag, broadcast, round):
def _bc(m):
broadcast(
(tag, (round, m))
)
return _bc
def getSignatureCost():
return signatureCost
def dummyCoin(round, N):
# global signatureCost
# signatureCost += 2048 / 8 * N
return int(hashlib.md5(str(round)).hexdigest(), 16) % 2
# return round % 2 # Somehow hashlib does not work well on EC2. I always get 0 from this function.
class MonitoredInt(object):
_getcallback = lambda _: None
_setcallback = lambda _: None
def _getdata(self):
self._getcallback()
return self.__data
def _setdata(self, value):
self.__data = value
self._setcallback(value)
def __init__(self, getCallback=lambda _: None, setCallback=lambda _: None):
self._getcallback = lambda _: None
self._setcallback = lambda _: None
self._data = 0
def registerGetCallBack(self, getCallBack):
self._getcallback = getCallBack
def registerSetCallBack(self, setCallBack):
self._setcallback = setCallBack
data = property(_getdata, _setdata)
def garbageCleaner(channel): # Keep cleaning the channel
while True:
channel.get()
def loopWrapper(func):
def _loop(*args, **kargs):
while True:
func(*args, **kargs)
return _loop
class ACSException(Exception):
pass
def greenletPacker(greenlet, name, parent_arguments):
greenlet.name = name
greenlet.parent_args = parent_arguments
return greenlet
def greenletFunction(func):
func.at_exit = lambda: None # manual at_exit since Greenlet does not provide this event by default
return func
def checkExceptionPerGreenlet(ignoreHealthyOnes=True):
mylog("Tring to detect greenlets...")
for ob in gc.get_objects():
if not hasattr(ob, 'parent_args'):
continue
if not ob:
continue
if ignoreHealthyOnes and (not ob.exception):
continue
mylog('%s[%s] called with parent arg\n(%s)\n%s' % (ob.name, repr(ob.args), repr(ob.parent_args),
''.join(traceback.format_stack(ob.gr_frame))), verboseLevel=-1)
mylog(ob.exception)
if __name__ == '__main__':
a = MonitoredInt()
a.data = 1
def callback(val):
print "Callback called with", val
a.registerSetCallBack(callback)
a.data = 2