OPENSSL-DHPARAM(1ssl) OpenSSL OPENSSL-DHPARAM(1ssl) openssl-dhparam - DH openssl dhparam [-help] [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-out filename] [-dsaparam] [-check] [-noout] [-text] [-verbose] [-quiet] [-2] [-3] [-5] [-engine id] [-rand files] [-writerand file] [-provider name] [-provider-path path] [-provparam [name:]key=value] [-propquery propq] [numbits] DH. "" openssl-genpkey(1) . -help . -inform DER|PEM -outform DER|PEM PEM. PKCS#3 DHparameter. openssl-format-options(1) . -in _ . -out _ . . . / . . -dsaparam DSA DH DH. ( (p-1)/2 ) DH. DH -dsaparam . DH DSA DH . -check . -2, -3, -5 2 3 5. . numbits 2. numbits numbits. . . (-2 -3 -5) 2048 . 512 . 10000 . -noout . -text DH . -engine id " " openssl(1). . -rand -writerand " " openssl(1) . -provider -provider-path -provparam [:]= -propquery propq " " openssl(1) provider(7) property(7). -verbose . -quiet . dh gendh . openssl(1), openssl-pkeyparam(1), openssl-dsaparam(1), openssl-genpkey(1). -engine OpenSSL 3.0. -C OpenSSL 3.0. 2000-2023 OpenSSL. . Apache 2.0 ( ""). . LICENSE . 3 . . : . 3.6.2 7 2026 OPENSSL-DHPARAM(1ssl)