openssl ecparam -name secp384r1 -genkey
-----BEGIN EC PARAMETERS-----
BgUrgQQAIg==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIGkAgEBBDCzK1e0D3pjhdCX9UeDKl9gw9X08NEeuXcM/rpYQaGRPnvtGUpyfGYh
MwSA7esyvi2gBwYFK4EEACKhZANiAARqZMdLxqCHtcIHE6y4DTeVkOTigpUxb2Ll
H7BZMOkrxuC0g5tUnWFW1gQQt/O5XjHmz69ADqp6Ktgc7l3RXBdkxzf3ND1CbBAM
reMnqe/mAkhmD2GSN/4mUyyfeacpfEw=
-----END EC PRIVATE KEY-----