Crypt::PRNG::Fortuna(3)

NAME
Crypt::PRNG::Fortuna - Cryptographically secure PRNG based on Fortuna algorithm

SYNOPSIS
   ### Functional interface:
   use Crypt::PRNG::Fortuna qw(random_bytes random_bytes_hex random_bytes_b64 random_bytes_b64u
                               random_string random_string_from rand irand);

   my $octets = random_bytes(45);
   my $hex_string = random_bytes_hex(45);
   my $base64_string = random_bytes_b64(45);
   my $base64url_string = random_bytes_b64u(45);
   my $alphanumeric_string = random_string(30);
   my $string = random_string_from('ACGT', 64);
   my $floating_point_number_0_to_1 = rand;
   my $floating_point_number_0_to_88 = rand(88);
   my $unsigned_32bit_int = irand;

   ### OO interface:
   use Crypt::PRNG::Fortuna;

   my $prng = Crypt::PRNG::Fortuna->new;
   my $seeded_prng = Crypt::PRNG::Fortuna->new("some data used for seeding PRNG");

   my $octets = $prng->bytes(45);
   my $hex_string = $prng->bytes_hex(45);
   my $base64_string = $prng->bytes_b64(45);
   my $base64url_string = $prng->bytes_b64u(45);
   my $alphanumeric_string = $prng->string(30);
   my $string = $prng->string_from('ACGT', 64);
   my $floating_point_number_0_to_1 = $prng->double;
   my $floating_point_number_0_to_88 = $prng->double(88);
   my $unsigned_32bit_int = $prng->int32;

DESCRIPTION
Provides an interface to the Fortuna-based pseudo-random number generator.

This is a thin wrapper around Crypt::PRNG with the algorithm fixed to Fortuna. All functions and methods accept the same arguments and return the same values as the corresponding Crypt::PRNG entries.

EXPORT
Nothing is exported by default.

You can export selected functions:

  use Crypt::PRNG::Fortuna qw(random_bytes random_string);

Or all of them at once:

  use Crypt::PRNG::Fortuna ':all';

FUNCTIONS
All functions below behave exactly like the corresponding Crypt::PRNG functions, but use a hidden "Crypt::PRNG::Fortuna" object internally.

  random_bytes
See "random_bytes" in Crypt::PRNG.

  random_bytes_hex
See "random_bytes_hex" in Crypt::PRNG.

  random_bytes_b64
See "random_bytes_b64" in Crypt::PRNG.

  random_bytes_b64u
See "random_bytes_b64u" in Crypt::PRNG.

  random_string
See "random_string" in Crypt::PRNG.

  random_string_from
See "random_string_from" in Crypt::PRNG.

  rand
See "rand" in Crypt::PRNG.

  irand
See "irand" in Crypt::PRNG.

METHODS
Unless noted otherwise, assume $prng is an existing "Crypt::PRNG::Fortuna" object created via "new".

  new
 my $prng = Crypt::PRNG::Fortuna->new;
 my $seeded_prng = Crypt::PRNG::Fortuna->new($seed);

Creates a PRNG object using the Fortuna algorithm. If $seed is omitted, the object is automatically seeded by the underlying Crypt::PRNG logic.

  bytes
See "bytes" in Crypt::PRNG.

  bytes_hex
See "bytes_hex" in Crypt::PRNG.

  bytes_b64
See "bytes_b64" in Crypt::PRNG.

  bytes_b64u
See "bytes_b64u" in Crypt::PRNG.

  string
See "string" in Crypt::PRNG.

  string_from
See "string_from" in Crypt::PRNG.

  double
See "double" in Crypt::PRNG.

  int32
See "int32" in Crypt::PRNG.

SEE ALSO

•   Crypt::PRNG

•   <https://en.wikipedia.org/wiki/Fortuna_%28PRNG%29>