Exchanged key deviates after few minutes about rosenpass HOT 5 CLOSED

Now I can no longer reproduce the logged error...
The deviating keys problem is still reproducible and it does not recover at all - at least not within 3 hours

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it works, thx

from rosenpass.

Hi there, thank you for reporting this!

Good to see somebody is using outfile :)

[2023-04-10T13:23:10Z ERROR rosenpass] unexpected error after processing 0 messages: Operation not permitted (os error 1) disabled backtrace

I am not sure what causes this error. You may be able to debug by setting env variable RUST_BACKTRACE=1.

I think it is because both peers know the endpoint of the other and initiate the key exchange at the same time, which would also explain the error messages and that the first 2 exchanges run within 3 seconds.

If you keep it running, how long does it take for RP to recover? Does it recover at all?

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I can confirm that this happens; was able to reproduce. @textaligncenter thank you for reporting.

Anyone running into this issue: As @textaligncenter mentioned, specifying endpoint on only one peer seems to work around this issue for now.

It looks a lot like some sort of race condition involving retransmission handling; I keep seeing key outputs in quick succession. Normally it should take minutes between each output. Both peers keep specifying the same – mismatched – key. Occasionally I see the respective other key being used by a client but the key quickly gets overwritten by the other one. On both sides…

Ftr: Here is what I use to test:

./target/debug/rosenpass exchange private-key ~/tmp/k1/pqsk public-key ~/tmp/k1/pqpk listen 127.0.0.1:11000 verbose peer public-key ~/tmp/k2/pqpk endpoint 127.0.0.1:9999 outfile ~/tmp/osk1 | ts | while read -r l; do echo "$l $(cat ~/tmp/osk1)"; done | tee ~/tmp/log1

./target/debug/rosenpass exchange private-key ~/tmp/k2/pqsk public-key ~/tmp/k2/pqpk listen 127.0.0.1:9999 verbose peer public-key ~/tmp/k1/pqpk outfile ~/tmp/osk2 | ts | while read -r l; do echo "$l $(cat ~/tmp/osk2)"; done | tee ~/tmp/log2

./target/debug/rosenpass exchange private-key ~/tmp/k2/pqsk public-key ~/tmp/k2/pqpk listen 127.0.0.1:9999 verbose peer public-key ~/tmp/k1/pqpk endpoint 127.0.0.1:11000 outfile ~/tmp/osk2 | ts | while read -r l; do echo "$l $(cat ~/tmp/osk2)"; done | tee ~/tmp/log2

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Could you give #78 a try @textaligncenter ?

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