OPENSSL-ECPARAM(1ssl) OpenSSL OPENSSL-ECPARAM(1ssl) openssl-ecparam - openssl ecparam [-help] [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-out filename] [-noout] [-text] [-check] [-check_named] [-name arg] [-list_curves] [-conv_form arg] [-param_enc arg] [-no_seed] [-genkey] [-engine id] [-rand files] [-writerand file] [-provider name] [-provider-path path] [-provparam [name:]key=value] [-propquery propq] . OpenSSL (). -help . -inform DER|PEM . openssl-format-options(1) . -outform DER|PEM PEM. openssl-format-options(1) . EcpkParameters IETF RFC 3279. -in _ . -out _ . . . / . . -noout . -text . -check . -check_named . -name arg '' . -list_curves . -list_curves . -conv_form . : compressed uncompressed ( ) hybrid. X9.62. compressed OPENSSL_EC_BIN_PT_COMP . -param_enc . : named_curve ec OID explicit ec ( RFC 3279 EC). named_curve. : implicitlyCA RFC 3279 OpenSSL. -no_seed '' ECParameters ( RFC 3279). -genkey . -engine id " " openssl(1). . -rand -writerand " " openssl(1) . -provider -provider-path -provparam [:]= -propquery propq " " openssl(1) provider(7) property(7). openssl-genpkey(1) openssl-pkeyparam(1) . openssl-genpkey(1) openssl-pkeyparam(1) . EC 'prime192v1': openssl ecparam -out ec_param.pem -name prime192v1 EC : openssl ecparam -out ec_param.pem -name prime192v1 -param_enc explicit EC : openssl ecparam -in ec_param.pem -check EC : openssl ecparam -out ec_key.pem -name prime192v1 -genkey '': openssl ecparam -in ec_in.pem -out ec_out.pem -conv_form compressed EC : openssl ecparam -in ec_param.pem -noout -text openssl(1) openssl-pkeyparam(1) openssl-genpkey(1) openssl-ec(1) openssl-dsaparam(1) -engine OpenSSL 3.0. -C OpenSSL 3.0. 2003-2021 OpenSSL. . Apache 2.0 ( ""). . LICENSE . 3 . . : . 3.6.2 7 2026 OPENSSL-ECPARAM(1ssl)