SessionX::Generate::MDUser Contributed Perl DocumentSessionX::Generate::MD5(3)NAME
Apache::Session::Generate::MD5 - Use MD5 to create random object IDs
SYNOPSIS
use Apache::SessionX::Generate::MD5;
$id = Apache::SessionX::Generate::MD5::generate($string);
DESCRIPTION
This module fulfills the ID generation interface of Apache::SessionX.
If you don't give the argument $string, the IDs are generated using a
two-round MD5 of a random number, the time since the epoch, the process
ID, and the address of an anonymous hash. The resultant ID number is
highly entropic on Linux and other platforms that have good random
number generators. You are encouraged to investigate the quality of
your system's random number generator if you are using the generated ID
numbers in a secure environment. If you give $string the ID is the MD5
hash of that string.
This module can also examine session IDs to ensure that they are,
indeed, session ID numbers and not evil attacks. The reader is
encouraged to consider the effect of bogus session ID numbers in a
system which uses these ID numbers to access disks and databases.
This modules takes one argument in the usual Apache::Session style.
The argument is IDLength, and the value, between 0 and 32, tells this
module where to truncate the session ID. Without this argument, the
session ID will be 32 hexadecimal characters long, equivalent to a
128-bit key.
AUTHOR
This module was written by Jeffrey William Baker <jwbaker@acm.org> and
modified by Gerald Richter <richter@dev.ecos.de>.
SEE ALSO
Apache::Session
perl v5.18.1 2005-11-10 SessionX::Generate::MD5(3)
