Manual: openssl-dsaparam

OPENSSL-DSAPARAM(1SSL)					   OpenSSL				      OPENSSL-DSAPARAM(1SSL)

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] [-quiet] [-rand files] [-writerand file] [-engine id] [-provider name] [-provider-path path]
       [-provparam [name:]key=value] [-propquery propq] [numbits] [numqbits]

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 file 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 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.

       -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.

       -quiet
	   Print fewer details about the operations being performed, which may be handy during batch scripts and pipelines.

       -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	 optional  argument  specifies that a parameter set should be generated of size numbits. If this argument is
	   included then the input file (if any) is ignored.

       numqbits
	   This optional argument specifies that a parameter set should be generated with a subprime  parameter	 q  of	size
	   numqbits. It must be the last argument. If this argument is included then the input file (if any) is ignored.

       -provider name
       -provider-path path
       -provparam [name:]key=value
       -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 2000-2023 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
       .

3.5.5							 2026-01-27				      OPENSSL-DSAPARAM(1SSL)