NAME

       openssl-dsaparam - DSA parameter manipulation and generation

SYNOPSIS

       openssl dsaparam [-help] [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-out
       filename] [-noout] [-text] [-genkey] [-verbose] [-rand files] [-writerand file] [-engine
       id] [-provider name] [-provider-path path] [-propquery propq] [numbits]

DESCRIPTION

       This command is used to manipulate or generate DSA parameter files.

       DSA parameter generation can be a slow process and as a result the same set of DSA
       parameters is often used to generate several distinct keys.

OPTIONS

       -help
           Print out a usage message.

       -inform DER|PEM
           The DSA parameters input format; unspecified by default.  See
           openssl-format-options(1) for details.

       -outform DER|PEM
           The DSA parameters output format; the default is PEM.  See openssl-format-options(1)
           for details.

           Parameters are a sequence of ASN.1 INTEGERs: p, q, and g.  This is compatible with RFC
           2459 DSS-Parms structure.

       -in filename
           This specifies the input filename to read parameters from or standard input if this
           option is not specified. If the numbits parameter is included then this option will be
           ignored.

       -out filename
           This specifies the output filename parameters to. Standard output is used if this
           option is not present. The output filename should not be the same as the input
           filename.

       -noout
           This option inhibits the output of the encoded version of the parameters.

       -text
           This option prints out the DSA parameters in human readable form.

       -genkey
           This option will generate a DSA either using the specified or generated parameters.

       -verbose
           Print extra details about the operations being performed.

       -rand files, -writerand file
           See "Random State Options" in openssl(1) for details.

       -engine id
           See "Engine Options" in openssl(1).  This option is deprecated.

       numbits
           This option specifies that a parameter set should be generated of size numbits. It
           must be the last option. If this option is included then the input file (if any) is
           ignored.

       -provider name
       -provider-path path
       -propquery propq
           See "Provider Options" in openssl(1), provider(7), and property(7).

SEE ALSO

       openssl(1), openssl-pkeyparam(1), openssl-gendsa(1), openssl-dsa(1), openssl-genrsa(1),
       openssl-rsa(1)

HISTORY

       The -engine option was deprecated in OpenSSL 3.0.

       The -C option was removed in OpenSSL 3.0.

COPYRIGHT

       Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except
       in compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.