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Fixed missing destination-side ephemeral key generation in link establishment

This commit is contained in:
Mark Qvist 2022-09-29 22:47:10 +02:00
parent 32ee4216fd
commit 8886ed5794
1 changed files with 9 additions and 8 deletions
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17
RNS/Link.py
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@ -164,7 +164,7 @@ class Link:
self.__remote_identity = None self.__remote_identity = None
if self.destination == None: if self.destination == None:
self.initiator = False self.initiator = False
self.prv = self.owner.identity.prv self.prv = X25519PrivateKey.generate()
self.sig_prv = self.owner.identity.sig_prv self.sig_prv = self.owner.identity.sig_prv
else: else:
self.initiator = True self.initiator = True
@ -193,15 +193,11 @@ class Link:
self.set_link_closed_callback(closed_callback) self.set_link_closed_callback(closed_callback)
if (self.initiator): if (self.initiator):
peer_pub_bytes = self.destination.identity.get_public_key()[:Link.ECPUBSIZE//2]
peer_sig_pub_bytes = self.destination.identity.get_public_key()[Link.ECPUBSIZE//2:Link.ECPUBSIZE]
self.request_data = self.pub_bytes+self.sig_pub_bytes self.request_data = self.pub_bytes+self.sig_pub_bytes
self.packet = RNS.Packet(destination, self.request_data, packet_type=RNS.Packet.LINKREQUEST) self.packet = RNS.Packet(destination, self.request_data, packet_type=RNS.Packet.LINKREQUEST)
self.packet.pack() self.packet.pack()
self.establishment_cost += len(self.packet.raw) self.establishment_cost += len(self.packet.raw)
self.set_link_id(self.packet) self.set_link_id(self.packet)
self.load_peer(peer_pub_bytes, peer_sig_pub_bytes)
self.handshake()
RNS.Transport.register_link(self) RNS.Transport.register_link(self)
self.request_time = time.time() self.request_time = time.time()
self.start_watchdog() self.start_watchdog()
@ -240,7 +236,7 @@ class Link:
signed_data = self.link_id+self.pub_bytes+self.sig_pub_bytes signed_data = self.link_id+self.pub_bytes+self.sig_pub_bytes
signature = self.owner.identity.sign(signed_data) signature = self.owner.identity.sign(signed_data)
proof_data = signature proof_data = signature+self.pub_bytes
proof = RNS.Packet(self, proof_data, packet_type=RNS.Packet.PROOF, context=RNS.Packet.LRPROOF) proof = RNS.Packet(self, proof_data, packet_type=RNS.Packet.PROOF, context=RNS.Packet.LRPROOF)
proof.send() proof.send()
self.establishment_cost += len(proof.raw) self.establishment_cost += len(proof.raw)
@ -261,8 +257,13 @@ class Link:
self.had_outbound() self.had_outbound()
def validate_proof(self, packet): def validate_proof(self, packet):
if self.status == Link.HANDSHAKE: if self.status == Link.PENDING:
if self.initiator and len(packet.data) == RNS.Identity.SIGLENGTH//8: if self.initiator and len(packet.data) == RNS.Identity.SIGLENGTH//8+Link.ECPUBSIZE//2:
peer_pub_bytes = packet.data[RNS.Identity.SIGLENGTH//8:RNS.Identity.SIGLENGTH//8+Link.ECPUBSIZE//2]
peer_sig_pub_bytes = self.destination.identity.get_public_key()[Link.ECPUBSIZE//2:Link.ECPUBSIZE]
self.load_peer(peer_pub_bytes, peer_sig_pub_bytes)
self.handshake()
self.establishment_cost += len(packet.raw) self.establishment_cost += len(packet.raw)
signed_data = self.link_id+self.peer_pub_bytes+self.peer_sig_pub_bytes signed_data = self.link_id+self.peer_pub_bytes+self.peer_sig_pub_bytes
signature = packet.data[:RNS.Identity.SIGLENGTH//8] signature = packet.data[:RNS.Identity.SIGLENGTH//8]