openssl-passwd, passwd - compute password hashes
openssl passwd [-help] [-crypt] [-1] [-apr1]
  [-aixmd5] [-5] [-6] [-salt string]
  [-in file] [-stdin] [-noverify] [-quiet]
  [-table] [-rand file...] [-writerand file]
  {password}
The passwd command computes the hash of a password typed at run-time or
  the hash of each password in a list. The password list is taken from the named
  file for option -in file, from stdin for option -stdin, or from
  the command line, or from the terminal otherwise. The Unix standard algorithm
  crypt and the MD5-based BSD password algorithm 1, its Apache
  variant apr1, and its AIX variant are available.
  - -help
- Print out a usage message.
- -crypt
- Use the crypt algorithm (default).
- -1
- Use the MD5 based BSD password algorithm 1.
- -apr1
- Use the apr1 algorithm (Apache variant of the BSD algorithm).
- -aixmd5
- Use the AIX MD5 algorithm (AIX variant of the BSD algorithm).
- -5
- -6
- Use the SHA256 / SHA512 based algorithms defined by Ulrich
      Drepper. See <https://www.akkadia.org/drepper/SHA-crypt.txt>.
- -salt string
- Use the specified salt. When reading a password from the terminal, this
      implies -noverify.
- -in file
- Read passwords from file.
- -stdin
- Read passwords from stdin.
- -noverify
- Don't verify when reading a password from the terminal.
- -quiet
- Don't output warnings when passwords given at the command line are
      truncated.
- -table
- In the output list, prepend the cleartext password and a TAB character to
      each password hash.
- -rand file...
- A file or files containing random data used to seed the random number
      generator. Multiple files can be specified separated by an OS-dependent
      character. The separator is ; for MS-Windows, , for OpenVMS,
      and : for all others.
- [-writerand file]
- Writes random data to the specified file upon exit. This can be
      used with a subsequent -rand flag.
  % openssl passwd -crypt -salt xx password
  xxj31ZMTZzkVA
  % openssl passwd -1 -salt xxxxxxxx password
  $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.
  % openssl passwd -apr1 -salt xxxxxxxx password
  $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0
  % openssl passwd -aixmd5 -salt xxxxxxxx password
  xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/
Copyright 2000-2018 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>.