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)