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device: fix races from changing private_key

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Access keypair.sendNonce atomically.
Eliminate one unnecessary initialization to zero.

Mutate handshake.lastSentHandshake with the mutex held.

Co-authored-by: David Anderson <danderson@tailscale.com>
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder
2020-12-15 15:02:13 -08:00
committed by Jason A. Donenfeld
parent c8faa34cde
commit 70861686d3
5 changed files with 32 additions and 11 deletions
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device/noise-protocol.go
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@@ -566,7 +566,6 @@ func (peer *Peer) BeginSymmetricSession() error {
setZero(recvKey[:])
keypair.created = time.Now()
keypair.sendNonce = 0
keypair.replayFilter.Reset()
keypair.isInitiator = isInitiator
keypair.localIndex = peer.handshake.localIndex