def new_deterministic(self, name, type, text):
for i in range(0, 2**64, 2):
s1 = serialize.Serializer()
s1.str(text)
s1.vint(i)
sigkey = crypto.sha512(s1.data)[0:32]
s2 = serialize.Serializer()
s2.str(text)
s2.vint(i + 1)
deckey = crypto.sha512(s2.data)[0:32]
verkey = crypto.priv_to_pub(sigkey)
enckey = crypto.priv_to_pub(deckey)
ripe = crypto.to_ripe(verkey, enckey)
if ripe[0:1] == b'\x00':
return self.new_identity(name, type, sigkey, deckey)
def new_deterministic(self, name, type, text):
for i in range(0, 2**64, 2):
s1 = serialize.Serializer()
s1.str(text)
s1.vint(i)
sigkey = crypto.sha512(s1.data)[0:32]
s2 = serialize.Serializer()
s2.str(text)
s2.vint(i + 1)
deckey = crypto.sha512(s2.data)[0:32]
verkey = crypto.priv_to_pub(sigkey)
enckey = crypto.priv_to_pub(deckey)
ripe = crypto.to_ripe(verkey, enckey)
if ripe[0:1] == b'\x00':
return self.new_identity(name, type, sigkey, deckey)
def get(data, size=10):
# TODO salt identicons
if data == b'':
hash = b''
else:
hash = crypto.sha512(data)
return qidenticon.render_identicon(int.from_bytes(hash, 'big'), size, True, 0, 0)
def brink(self):
a = self.nonce.to_bytes(8, 'big')
initial = crypto.sha512(self.data[8:])
c = crypto.sha512d(a + initial)
value = int.from_bytes(c[:8], 'big')
return int(self.expires - 2**80 /
(value * config.NETWORK_TRIALS *
(len(self.data) + config.NETWORK_EXTRA)) + 2**16)
def check(payload, trials, extra, ttl, nonce):
length = len(payload) + 8 + extra
target = int(2**64/(trials*(length+ttl*length/(2**16))))
initial = crypto.sha512(payload)
a = nonce.to_bytes(8, 'big')
c = crypto.sha512d(a+initial)
value = int.from_bytes(c[:8], 'big')
return value <= target
def send_packet(self, payload):
magic = 0xe9beb4d9
command = payload.command
payloaddata = payload.data
length = len(payloaddata)
checksum = crypto.sha512(payloaddata)[:4]
header = packet.Header(magic, command, length, checksum)
self._c.send(header.to_bytes())
self._c.send(payloaddata)
def send_packet(self, payload):
magic = 0xe9beb4d9
command = payload.command
payloaddata = payload.data
length = len(payloaddata)
checksum = crypto.sha512(payloaddata)[:4]
header = packet.Header(magic, command, length, checksum)
self._c.send(header.to_bytes())
self._c.send(payloaddata)
def pow(payload, trials, extra, ttl):
length = len(payload) + 8 + extra
target = int(2**64/(trials*(length+max(ttl,0)*length/(2**16))))
value = target + 1
initial = crypto.sha512(payload)
nonce = int.from_bytes(os.urandom(8), 'big') # Make it harder for attackers to determine how many numbers we have tried
while value > target:
nonce = (nonce + 1) % (2**64)
a = nonce.to_bytes(8, 'big')
c = crypto.sha512d(a+initial)
value = int.from_bytes(c[:8], 'big')
return nonce
def recv_packet(self):
headerdata = b''
while len(headerdata) < 24:
buf = yield from self._c.recv(24 - len(headerdata))
if not buf:
return None
headerdata += buf
header = packet.Header.from_bytes(headerdata)
if header.magic != 0xe9beb4d9:
return None
payloaddata = b''
while len(payloaddata) < header.length:
buf = yield from self._c.recv(header.length - len(payloaddata))
if not buf:
return None
payloaddata += buf
if header.checksum != crypto.sha512(payloaddata)[:4]:
return None
return packet.Generic(header.command, payloaddata)
def recv_packet(self):
headerdata = b''
while len(headerdata) < 24:
buf = yield from self._c.recv(24 - len(headerdata))
if not buf:
return None
headerdata += buf
header = packet.Header.from_bytes(headerdata)
if header.magic != 0xe9beb4d9:
return None
payloaddata = b''
while len(payloaddata) < header.length:
buf = yield from self._c.recv(header.length - len(payloaddata))
if not buf:
return None
payloaddata += buf
if header.checksum != crypto.sha512(payloaddata)[:4]:
return None
return packet.Generic(header.command, payloaddata)
def brink(self):
a = self.nonce.to_bytes(8, 'big')
initial = crypto.sha512(self.data[8:])
c = crypto.sha512d(a+initial)
value = int.from_bytes(c[:8], 'big')
return int(self.expires-2**80/(value*config.NETWORK_TRIALS*(len(self.data)+config.NETWORK_EXTRA))+2**16)