openssl version
$ echo | openssl s_client -connect redhat.com:443 -brief CONNECTION ESTABLISHED Protocol version: TLSv1.2 Ciphersuite: ECDHE-RSA-AES128-GCM-SHA256 Peer certificate: C = US, ST = North Carolina, L = Raleigh, O = "Red Hat, Inc.", OU = Information Technology, CN = *.redhat.com Hash used: SHA256 Signature type: RSA Verification: OK Supported Elliptic Curve Point Formats: uncompressed Server Temp Key: ECDH, P-256, 256 bits DONE