# man > OPENSSL-DSAPARAM(1SSL)

[_OPENSSL-DSAPARAM_(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-DSAPARAM/1SSL/markdown)                         OpenSSL                        [_OPENSSL-DSAPARAM_(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-DSAPARAM/1SSL/markdown)

## 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
           The  DSA  parameters input format; unspecified by default.  See [**openssl-format-options**(1)](https://www.chedong.com/phpMan.php/man/openssl-format-options/1/markdown)
           for details.

### -outform DER
           The DSA parameters output format; the default is **PEM**.  See [**openssl-format-options**(1)](https://www.chedong.com/phpMan.php/man/openssl-format-options/1/markdown)  for
           details.

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

### -in _
           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 _
           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 _ -writerand _
           See "Random State Options" in [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown) for details.

### -engine _
           See "Engine Options" in [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown).  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 _
### -provider-path _
### -propquery _
           See "Provider Options" in [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown), [**provider**(7)](https://www.chedong.com/phpMan.php/man/provider/7/markdown), and [**property**(7)](https://www.chedong.com/phpMan.php/man/property/7/markdown).

## SEE ALSO
       [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown),  [**openssl-pkeyparam**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkeyparam/1/markdown),  [**openssl-gendsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-gendsa/1/markdown),   [**openssl-dsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-dsa/1/markdown),   [**openssl-genrsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-genrsa/1/markdown),
       [**openssl-rsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-rsa/1/markdown)

## 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>>.

3.0.13                                       2026-07-29                       [_OPENSSL-DSAPARAM_(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-DSAPARAM/1SSL/markdown)