[gnutls-devel] GnuTLS | Fix handshake segfault if no privkey is supplied (!1657)

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Daiki Ueno commented:


Although this certainly would fix the original issue, I'm not sure if `_gnutls_privkey_compatible_with_sig` is the best place to add the check.

As the server must have a private key when certificate authentication is used, IMO a more appropriate place would be somewhere in `lib/auth/cert.c` (e.g., `_gnutls_select_server_cert` or `call_get_cert_callback`, where `session->internals.selected_key` is looked up but not found).

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