Synergy-core: Connection issues due to weak SSL keys on recent OS

[xmstspider]

Operating Systems

Ubuntu 20.04 LTS (5.4.0-26-generic #30-Ubuntu)

Synergy Version

1.11.1.stable~b58+55ec3105

Steps to Reproduce

I can confirm the same issue as in #6561 is present in recent Ubuntu 20.04 LTS.

ERROR: secure socket error: could not use tls certificate ERROR: openssl error: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small

[Jnewbon]

Can you try deleting the certificate and allowing synergy to recreate it
rm ~/.synergy/SSL/Synergy.pem

This problem was fixed the issue you linked, but it was decided that if a certificate already exists it would default to that rather then recreate one.

If the problem persists comment back and I will reopen the issue

[xmstspider]

Ok, so the proper fix is:
On Linux, shutdown the Synergy client or server and run rm -rfv ~/.synergy/SSL/
On Windows, shutdown the Synergy client or server and delete %USERPROFILE%\AppData\Local\Synergy\SSL

Start both client(s) and server.

It looks like the fingerprints spooked as well. Now it's working

[moneyatbo]

I can also confirm this worked for me.

[nbolton]

Duplicate of #6671
Will be fixed by #6669