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.



Print out a usage message.


Use the crypt algorithm (default).


Use the MD5 based BSD password algorithm 1.


Use the apr1 algorithm (Apache variant of the BSD algorithm).


Use the AIX MD5 algorithm ( AIX variant of the BSD algorithm).



Use the SHA256 / SHA512 based algorithms defined by Ulrich Drepper. See <>.

-salt string

Use the specified salt. When reading a password from the terminal, this implies -noverify.

-in file

Read passwords from file.


Read passwords from stdin.


Don’t verify when reading a password from the terminal.


Don’t output warnings when passwords given at the command line are truncated.


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
  % openssl passwd -1 -salt xxxxxxxx password
  % openssl passwd -apr1 -salt xxxxxxxx password
  % openssl passwd -aixmd5 -salt xxxxxxxx password


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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 <>.