ECDSA certificate
string "ecdsa-sha2-nistp256-v01@openssh.com" |
string "ecdsa-sha2-nistp256-cert-v01@openssh.com" |
"ecdsa-sha2-nistp384-v01@openssh.com" |
"ecdsa-sha2-nistp384-cert-v01@openssh.com" |
"ecdsa-sha2-nistp521-v01@openssh.com"
"ecdsa-sha2-nistp521-cert-v01@openssh.com"
string nonce
string curve
string public_key