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] [-provparam [name:]key=value] [-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 filename
           This  specifies  the  input  file  to  read  parameters  from or standard input if this option is not
           specified.

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

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

       -provider name
       -provider-path path
       -provparam [name:]key=value
       -propquery propq
           See "Provider Options" in openssl(1), provider(7), and property(7).

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),  openssl-genpkey(1),  openssl-rsa(1),  openssl-pkcs8(1),  openssl-dsa(1),  openssl-genrsa(1),
       openssl-gendsa(1)

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>.

3.5.0                                              2025-06-04                            OPENSSL-PKEYPARAM(1SSL)