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device: uniformly check ECDH output for zeros

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Reported-by: z <dzm@unexpl0.red>
Fixes: 8c34c4c ("First set of code review patches")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2023-02-16 15:51:30 +01:00
parent 1e2c3e5a3c
commit c7b76d3d9e
5 changed files with 45 additions and 38 deletions
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2
device/peer.go
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@@ -92,7 +92,7 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
// pre-compute DH
handshake := &peer.handshake
handshake.mutex.Lock()
handshake.precomputedStaticStatic = device.staticIdentity.privateKey.sharedSecret(pk)
handshake.precomputedStaticStatic, _ = device.staticIdentity.privateKey.sharedSecret(pk)
handshake.remoteStatic = pk
handshake.mutex.Unlock()