openssl ecparam -name secp384r1 -genkey
-----BEGIN EC PARAMETERS-----
BgUrgQQAIg==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIGkAgEBBDAzb/UOUefhWzR7oqjNIN5Kp1Smw8QgXe6oBCNitxyprV2Qg/9O0mVP
e2ZPkkGcnbSgBwYFK4EEACKhZANiAATzj9eIn5hnBTapFnyFss+OAnIZ66tIFB5v
ahOTPoC5qn9TnJGRnrF5duwx75dGMNj0rZxgwKYAiGJaaJ4+APNstBoQC3gS8/5f
R0AU5y3AgszP35P7IY7tWbJwHntwDOU=
-----END EC PRIVATE KEY-----