OPENSSL-DHPARAM(1ssl) OpenSSL OPENSSL-DHPARAM(1ssl) NOM openssl-dhparam - Manipulation et generation de parametres DH SYNOPSIS 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] DESCRIPTION Cette commande sert a manipuler des fichiers de parametres DH. See "EXAMPLES" in openssl-genpkey(1) for examples on how to generate a key using a named safe prime group without generating intermediate parameters. OPTIONS -help Afficher un message d'utilisation. -inform DER|PEM, -outform DER|PEM The input format and output format; the default is PEM. The object is compatible with the PKCS#3 DHparameter structure. See openssl-format-options(1) for details. -in fichier This specifies the input file to read parameters from or standard input if this option is not specified. -out filename This specifies the output file to write parameters to. Standard output is used if this option is not present. The output filename can be the same as the input filename, which leads to replacing the file contents. Note that file I/O is not atomic. The output file is truncated and then written. -dsaparam If this option is used, DSA rather than DH parameters are read or created; they are converted to DH format. Otherwise, safe primes (such that (p-1)/2 is also prime) will be used for DH parameter generation. DH parameter generation with the -dsaparam option is much faster. Beware that with such DSA-style DH parameters, a fresh DH key should be created for each use to avoid small-subgroup attacks that may be possible otherwise. -check Performs numerous checks to see if the supplied parameters are valid and displays a warning if not. -2, -3, -5 The generator to use, either 2, 3 or 5. If present then the input file is ignored and parameters are generated instead. If not present but numbits is present, parameters are generated with the default generator 2. nombrebits This option specifies that a parameter set should be generated of size numbits. It must be the last option. If this option is present then the input file is ignored and parameters are generated instead. If this option is not present but a generator (-2, -3 or -5) is present, parameters are generated with a default length of 2048 bits. The minimum length is 512 bits. The maximum length is 10000 bits. -noout Cette option empeche la sortie des parametres en version encodee. -text Cette option affiche les parametres DH sous forme lisible. -engine id Voir << Options de moteur >> dans openssl(1). Cette option est obsolete. -rand fichiers, -writerand fichier Voir << Options d'etat aleatoire >> dans openssl(1) pour des details. -provider nom -provider-path chemin -provparam [nom:]cle=valeur] -propquery propq Voir << Options de fournisseur >> dans openssl(1), provider(7) et property(7). -verbose This option enables the output of progress messages, which is handy when running commands interactively that may take a long time to execute. -quiet This option suppresses the output of progress messages, which may be undesirable in batch scripts or pipelines. NOTES This command replaces the dh and gendh commands of previous releases. VOIR AUSSI openssl(1), openssl-pkeyparam(1), openssl-dsaparam(1), openssl-genpkey(1). HISTORIQUE L'option -engine est obsolete dans OpenSSL 1.0.2b. The -C option was removed in OpenSSL 3.0. COPYRIGHT Copyright 2000-2023 Les auteurs du projet OpenSSL. Tous droits reserves. Sous licence Apache 2.0 (la << Licence >>). Vous ne pouvez utiliser ce fichier que conformement a la Licence. Vous trouverez une copie dans le fichier LICENSE de la distribution du source ou a l'adresse . TRADUCTION La traduction francaise de cette page de manuel a ete creee par arne, Nicolas Francois et David Prevot Cette traduction est une documentation libre ; veuillez vous reporter a la GNU General Public License version 3 concernant les conditions de copie et de distribution. Il n'y a aucune RESPONSABILITE LEGALE. Si vous decouvrez un bogue dans la traduction de cette page de manuel, veuillez envoyer un message a . 3.5.2 5 aout 2025 OPENSSL-DHPARAM(1ssl)