[tor-bugs] #29241 [Core Tor/Tor]: NSS SSL_ExportKeyingMaterial failing

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#29241: NSS SSL_ExportKeyingMaterial failing
------------------------------+--------------------
     Reporter:  sysrqb        |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------
 Possibly similar/related to #28616/#28973.

 {{{
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [notice] Self-testing indicates your ORPort is reachable from the outside.
 Excellent.
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [notice] Bootstrapped 15% (handshake_done): Handshake with a relay done
 [notice] Bootstrapped 75% (enough_dirinfo): Loaded enough directory info
 to build circuits
 [notice] Bootstrapped 90% (ap_handshake_done): Handshake fininshed with a
 relay to build circuits
 [notice] Bootstrapped 95% (circuit_create): Establishing a Tor circuit
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [notice] Bootstrapped 100% (done): Done
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 [warn] Couldn't send authenticate cell
 [warn] connection_or_compute_authenticate_cell_body(): Bug: TLS key export
 failed for unknown reason. (on Tor 0.4.0.1-alpha )
 }}}

 Reported by Alex on tor-relays@ - https://lists.torproject.org/pipermail
 /tor-relays/2019-January/016890.html

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29241>
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