create function have_ssl() returns char(3)
return (select if(variable_value > '','yes','no') as 'have_ssl'
  from information_schema.session_status
where variable_name='ssl_cipher');
# mysql --protocol tcp -uroot --ssl-verify-server-cert -e "select test.have_ssl()"
ERROR 2026 (HY000): TLS/SSL error: Failed to verify the server certificate
# mysql --protocol tcp -uroot --ssl-fp=F1:D0:08:AF:A1:D2:F4:15:79:B4:39:06:41:F4:20:96:F1:90:A9:65 --ssl-verify-server-cert -e "select test.have_ssl()"
test.have_ssl()
yes
# mysql --protocol tcp -uroot --ssl-fp=00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33 --disable-ssl-verify-server-cert -e "select test.have_ssl()"
ERROR 2026 (HY000): TLS/SSL error: Fingerprint verification of server certificate failed
drop function have_ssl;