Crypt::PRNG::Fortuna(3) User Contributed Perl Documentation
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
o Crypt::PRNG(3)
o <https://en.wikipedia.org/wiki/Fortuna_%28PRNG%29>
perl v5.34.3 2026-05-11 Crypt::PRNG::Fortuna(3)
cryptx 0.89.0 - Generated Tue May 12 09:27:26 CDT 2026