PASSWD

Section: OpenSSL (1)
Updated: 2021-03-26
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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

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>.