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NAME

openssl−passwd, passwd − compute password hashes

SYNOPSIS

openssl passwd [−help] [−crypt] [−1] [−apr1] [−aixmd5] [−5] [−6] [−salt string] [−in file] [−stdin] [−noverify] [−quiet] [−table] [−rand file...] [−writerand file] {password}

DESCRIPTION

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.

OPTIONS

−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.

EXAMPLES

  % 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

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>;.

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