Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

crypt::passwdmd5(3pm) [debian man page]

PasswdMD5(3pm)						User Contributed Perl Documentation					    PasswdMD5(3pm)

NAME

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

SYNOPSIS

	   use Crypt::PasswdMD5;

	   $cryptedpassword = unix_md5_crypt($password, $salt);
	   $apachepassword = apache_md5_crypt($password, $salt);

DESCRIPTION

       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):
	<phk@login.dknet.dk> 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 <bryan@eai.com>.
       As suggested by William A. Rowe, Jr. <wrowe@lnd.com>, 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 <jpeacock@cpan.org>.

   EXPORT
       None by default.

HISTORY

       $Id: PasswdMD5.pm,v 1.3 2004/02/17 11:21:38 lem Exp $

	19980710 luismunoz@cpan.org: Initial release
	19990402 bryan@eai.com: Added apache_md5_crypt to create a valid hash
			       for use in .htpasswd files
	20001006 wrowe@lnd.com: Requested apache_md5_crypt to be
			       exported by default.
	20010706 luismunoz@cpan.org: Use Digest::MD5 instead of the (obsolete) MD5.

       $Log: PasswdMD5.pm,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

LICENSE AND WARRANTY

       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.

AUTHOR

       Luis E. Mu[ntilde]oz <luismunoz@cpan.org>

SEE ALSO

       perl(1).

perl v5.12.4							    2011-08-30							    PasswdMD5(3pm)

Check Out this Related Man Page

crypt_sunmd5(5) 					Standards, Environments, and Macros					   crypt_sunmd5(5)

NAME

       crypt_sunmd5 - password hashing module using MD5 message hash algorithm

SYNOPSIS

       /usr/lib/security/$ISA/crypt_sunmd5.so

DESCRIPTION

       The crypt_sunmd5 module is a one-way password hashing module for use with crypt(3C) that uses the MD5 message hash algorithm. The algorithm
       identifier for crypt.conf(4) and policy.conf(4) is md5.

       This module is designed to make it difficult to crack passwords that use brute force attacks based on high speed MD5  implementations  that
       use code inlining, unrolled loops, and table lookup.

       The maximum password length for crypt_sunmd5 is 255 characters.

       The following options can be passed to the module by means of crypt.conf(4):

       rounds=<positive_number>    Specifies the number of additional rounds of MD5 to use in generation of the salt; the default number of rounds
				   is 4096. Negative values have no effect and are ignored, that is, the number of rounds cannot be lowered  below
				   4096.

				   The number of additional rounds is stored in the salt string returned by crypt_gensalt(3C). For example:

				     $md5,rounds=1000$nlxmTTpz$

				   When  crypt_gensalt(3C)  is being used to generate a new salt, if the number of additional rounds configured in
				   crypt.conf(4) is greater than that in the old salt, the value from crypt.conf(4) is used instead.  This  allows
				   for migration to stronger (but more time-consuming) salts on password change.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       passwd(1),  crypt(3C), crypt_genhash_impl(3C), crypt_gensalt(3C), crypt_gensalt_impl(3C), getpassphrase(3C), crypt.conf(4), passwd(4), pol-
       icy.conf(4), attributes(5)

SunOS 5.11							    23 Dec 2003 						   crypt_sunmd5(5)
Man Page