# phpman > man > OPENSSL-PKEYPARAM(1SSL)

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



## NAME
       openssl-pkeyparam - public key algorithm parameter processing command

## SYNOPSIS
       **openssl** **pkeyparam** [**-help**] [**-in** _filename_] [**-out** _filename_] [**-text**] [**-noout**] [**-check**] [**-engine**
       _id_] [**-provider** _name_] [**-provider-path** _path_] [**-propquery** _propq_]

## DESCRIPTION
       This command processes public key algorithm parameters.  They can be checked for correctness
       and their components printed out.

## OPTIONS
### -help
           Print out a usage message.

### -in
           This specifies the input filename to read parameters from or standard input if this
           option is not specified.

### -out
           This specifies the output filename to write parameters to or standard output if this
           option is not specified.

### -text
           Prints out the parameters in plain text in addition to the encoded version.

### -noout
           Do not output the encoded version of the parameters.

### -check
           This option checks the correctness of parameters.

### -engine
           See "Engine Options" in [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown).  This option is deprecated.

### -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).

## EXAMPLES
       Print out text version of parameters:

        openssl pkeyparam -in param.pem -text

## NOTES
       There are no **-inform** or **-outform** options for this command because only PEM format is
       supported because the key type is determined by the PEM headers.

## SEE ALSO
       [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown), [**openssl-genpkey**(1)](https://www.chedong.com/phpMan.php/man/openssl-genpkey/1/markdown), [**openssl-rsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-rsa/1/markdown), [**openssl-pkcs8**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkcs8/1/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-gendsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-gendsa/1/markdown)

## HISTORY
       The **-engine** option was deprecated in OpenSSL 3.0.

## COPYRIGHT
       Copyright 2006-2021 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>>.



3.0.2                                        2026-06-02                      [OPENSSL-PKEYPARAM(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-PKEYPARAM/1SSL/markdown)