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 <−crypt.txt>;.

−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 <>;.