Crypt::PasswdMD5 - Provides interoperable MD5-based crypt functions


Crypt::PasswdMD5 - Provides interoperable MD5-based crypt() functions


    use Crypt::PasswdMD5;
    $cryptedpassword = unix_md5_crypt($password, $salt);
    $apachepassword = apache_md5_crypt($password, $salt);


the unix_md5_crypt() provides a crypt()-compatible interface to the rather new MD5-based crypt() function found in modern operating systems. It's based on the implementation found on FreeBSD 2.2.[56]-RELEASE and contains the following license in it:

 "THE BEER-WARE LICENSE" (Revision 42):
 <> wrote this file.  As long as you retain this notice you
 can do whatever you want with this stuff. If we meet some day, and you think
 this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp

apache_md5_crypt() provides a function compatible with Apache's .htpasswd files. This was contributed by Bryan Hart <>. As suggested by William A. Rowe, Jr. <>, it is exported by default.

For both functions, if a salt value is not supplied, a random salt will be generated. Contributed by John Peacock <>.


None by default.


$Id:,v 1.3 2004/02/17 11:21:38 lem Exp $

 19980710 Initial release
 19990402 Added apache_md5_crypt to create a valid hash
                        for use in .htpasswd files
 20001006 Requested apache_md5_crypt to be
                        exported by default.
 20010706 Use Digest::MD5 instead of the (obsolete) MD5.

$Log:,v $ Revision 1.3 2004/02/17 11:21:38 lem Modified the POD so that ABSTRACT can work Added usage example for apache_md5_crypt()

Revision 1.2 2004/02/17 11:04:35 lem Added patch for random salts from John Peacock (Thanks John!) De-MS-DOS-ified the file Replaced some '' with q// to make Emacs color highlighting happy Added CVS docs Completed the missing sections of the POD documentation Changed my email address to the Perl-related one for consistency The file is now encoded in ISO-8859-1


This code and all accompanying software comes with NO WARRANTY. You use it at your own risk.

This code and all accompanying software can be used freely under the same terms as Perl itself.


Luis E. Muņoz <>



 Crypt::PasswdMD5 - Provides interoperable MD5-based crypt functions