def _create_poa_message(self, msg_id, nonce_a, nonce_b):
if not self.poa:
raise MissingCertificateException('Missing certificate')
msg = [msg_id] + self.poa.serialize_to_list()
lst = [nonce_a, nonce_b, self.poa.serialize()]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
sig = self.my_keypair.sign_dsa_asn1(digest)
msg.append(sig)
return msg
def _create_poa_message(self, msg_id, nonce_a, nonce_b):
if not self.poa:
raise MissingCertificateException('Missing certificate')
msg = [msg_id] + self.poa.serialize_to_list()
lst = [nonce_a, nonce_b, self.poa.serialize()]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
sig = self.my_keypair.sign_dsa_asn1(digest)
msg.append(sig)
return msg
def verify(self):
if self.expire_time and self.expire_time < time.mktime(time.gmtime()):
raise POAExpiredException('Expired')
try:
lst = [self.torrent_id, self.torrent_pub_key, self.node_pub_key]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
pub = pub_key_from_der(self.torrent_pub_key)
if not pub.verify_dsa_asn1(digest, self.signature):
raise InvalidPOAException('Proof of access verification failed')
except Exception as e:
raise InvalidPOAException('Bad POA: %s' % e)
def verify(self):
if self.expire_time and self.expire_time < time.mktime(time.gmtime()):
raise POAExpiredException('Expired')
try:
lst = [self.torrent_id, self.torrent_pub_key, self.node_pub_key]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
pub = pub_key_from_der(self.torrent_pub_key)
if not pub.verify_dsa_asn1(digest, self.signature):
raise InvalidPOAException(
'Proof of access verification failed')
except Exception as e:
raise InvalidPOAException('Bad POA: %s' % e)
def _validate_poa_message(self, lst, nonce_a, nonce_b):
if len(lst) != 7:
raise BadMessageException('Require 7 elements, got %d' % len(lst))
poa = POA.deserialize_from_list(lst[1:-1])
sig = lst[-1]
if poa.torrent_id != self.torrent_id:
raise WrongSwarmException('Wrong swarm')
if poa.get_torrent_pub_key() not in self.torrent_pubkeys:
raise InvalidPOAException('Bad POA for this torrent')
lst = [nonce_a, nonce_b, poa.serialize()]
import sys
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
try:
pub = pub_key_from_der(poa.node_pub_key)
except:
print >> sys.stderr, 'The node_pub_key is no good'
print >> sys.stderr, poa.node_pub_key
raise Exception("Node's public key is no good...")
if not pub.verify_dsa_asn1(digest, sig):
raise InvalidSignatureException('Freshness test failed')
poa.verify()
return poa
def _validate_poa_message(self, lst, nonce_a, nonce_b):
if len(lst) != 7:
raise BadMessageException('Require 7 elements, got %d' % len(lst))
poa = POA.deserialize_from_list(lst[1:-1])
sig = lst[-1]
if poa.torrent_id != self.torrent_id:
raise WrongSwarmException('Wrong swarm')
if poa.get_torrent_pub_key() not in self.torrent_pubkeys:
raise InvalidPOAException('Bad POA for this torrent')
lst = [nonce_a, nonce_b, poa.serialize()]
import sys
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
try:
pub = pub_key_from_der(poa.node_pub_key)
except:
print >> sys.stderr, 'The node_pub_key is no good'
print >> sys.stderr, poa.node_pub_key
raise Exception("Node's public key is no good...")
if not pub.verify_dsa_asn1(digest, sig):
raise InvalidSignatureException('Freshness test failed')
poa.verify()
return poa
def sign(self, torrent_key_pair):
lst = [self.torrent_id, self.torrent_pub_key, self.node_pub_key]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
self.signature = torrent_key_pair.sign_dsa_asn1(digest)
def sign(self, torrent_key_pair):
lst = [self.torrent_id, self.torrent_pub_key, self.node_pub_key]
b_list = bencode(lst)
digest = permid.sha(b_list).digest()
self.signature = torrent_key_pair.sign_dsa_asn1(digest)
