String::Urandom - An alternative to using /dev/random

use String::Urandom;

my $obj = String::Urandom->new(
    LENGTH => 55,
    CHARS  => [ qw/ a b c 1 2 3 / ]
  );

print $obj->rand_string, "\n";

Using output from /dev/urandom. Simply convert bytes into 8-bit characters.

Params::Validate

From source:

$ tar xfz String-Urandom-0.X.X.tar.gz
$ perl MakeFile.PL PREFIX=~/path/to/custom/dir LIB=~/path/to/custom/lib
$ make
$ make test
$ make install

Perl one liner using CPAN.pm:

$ perl -MCPAN -e 'install String::Urandom'

Use of CPAN.pm in interactive mode:

$ perl -MCPAN -e shell
cpan> install String::Urandom
cpan> quit

Just like the manual installation of Perl modules, the user may need root access during this process to insure write permission is allowed within the installation directory.

Create an instance of a new string object. Configuration items may be passed as a parameter.

my $obj = new String::Urandom;

  or

my %params = (
    LENGTH => 55,
    CHARS  => [ qw/ a b c 1 2 3 / ]
  );

my $obj = String::Urandom->new(\%params);

This method will Set/Get the string character length.

$obj->str_length(55);

This method will Set/Get characters used for generating a string.

$obj->str_chars('a b c 1 2 3');

This method generates a new random string.

$obj->rand_string;

Defines the length of the string in characters.

default: 32

Defines the characters used for generating the string.

default: a-z A-Z 0-9

Any flavour of UNIX that supports /dev/urandom

In general, the longer the string length and total characters defined, the more secure the output result will be.

The /dev/urandom is an ("unlocked" random source) which reuses the internal pool to produce more pseudo-random bits. Since this is the case, the read may contain less entropy than its counterpart /dev/random. Knowing this, this module was intended to be used as a pseudorandom string generator for less secure applications where response timing may be an issue.

https://github.com/nuxy/perl-String-Urandom

urandom(4)

Marc S. Brooks <[email protected]> http://mbrooks.info

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

See http://www.perl.com/perl/misc/Artistic.html

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