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Fixed race condition when timed-out link receives a late establishment proof a few milliseconds after it has timed out

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This commit is contained in:
Mark Qvist 2023-06-02 21:24:49 +02:00
parent a8a7af4b74
commit 4f78973751
1 changed files with 11 additions and 8 deletions
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19
RNS/Link.py
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@ -225,15 +225,18 @@ class Link:
self.hash = self.link_id
def handshake(self):
self.status = Link.HANDSHAKE
self.shared_key = self.prv.exchange(self.peer_pub)
if self.status == Link.PENDING and self.prv != None:
self.status = Link.HANDSHAKE
self.shared_key = self.prv.exchange(self.peer_pub)
self.derived_key = RNS.Cryptography.hkdf(
length=32,
derive_from=self.shared_key,
salt=self.get_salt(),
context=self.get_context(),
)
self.derived_key = RNS.Cryptography.hkdf(
length=32,
derive_from=self.shared_key,
salt=self.get_salt(),
context=self.get_context(),
)
else:
RNS.log("Handshake attempt on "+str(self)+" with invalid state "+str(self.status), RNS.LOG_ERROR)
def prove(self):