openssl-pkeyparam, pkeyparam - public key algorithm parameter processing tool
openssl pkeyparam [-help] [-in filename] [-out
  filename] [-text] [-noout] [-engine id]
  [-check]
The pkeyparam command processes public key algorithm parameters. They can
  be checked for correctness and their components printed out.
  - -help
- Print out a usage message.
- -in filename
- This specifies the input filename 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.
- -text
- Prints out the parameters in plain text in addition to the encoded
      version.
- -noout
- Do not output the encoded version of the parameters.
- -engine id
- Specifying an engine (by its unique id string) will cause
      pkeyparam to attempt to obtain a functional reference to the
      specified engine, thus initialising it if needed. The engine will then be
      set as the default for all available algorithms.
- -check
- This option checks the correctness of parameters.
Print out text version of parameters:
 openssl pkeyparam -in param.pem -text
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.
genpkey(1), rsa(1), pkcs8(1), dsa(1),
  genrsa(1), gendsa(1)
Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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>.