Crypt::...ccak512(3)

🌸 NAME 🌸

Crypt::Digest::Keccak512 — Hash function Keccak-512 [size: 512 bits]. Bestie, this is the Crypt::...ccak512(3) page from User Contributed Perl Documentation, and it's lowkey iconic.

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✨ SYNOPSIS ✨

### Functional interface:
use Crypt::Digest::Keccak512 qw( keccak512 keccak512_hex keccak512_b64 keccak512_b64u
                             keccak512_file keccak512_file_hex keccak512_file_b64 keccak512_file_b64u );

# calculate digest from string/buffer
my $data = 'data string';
my $keccak512_raw  = keccak512($data);
my $keccak512_hex  = keccak512_hex($data);
my $keccak512_b64  = keccak512_b64($data);
my $keccak512_b64u = keccak512_b64u($data);
# or from file
my $keccak512_file_raw  = keccak512_file('filename.dat');
my $keccak512_file_hex  = keccak512_file_hex('filename.dat');
my $keccak512_file_b64  = keccak512_file_b64('filename.dat');
my $keccak512_file_b64u = keccak512_file_b64u('filename.dat');
# or from filehandle
my $filehandle = ...; # existing binary-mode filehandle
my $keccak512_fh_raw  = keccak512_file($filehandle);
my $keccak512_fh_hex  = keccak512_file_hex($filehandle);
my $keccak512_fh_b64  = keccak512_file_b64($filehandle);
my $keccak512_fh_b64u = keccak512_file_b64u($filehandle);

### OO interface:
use Crypt::Digest::Keccak512;

my $d = Crypt::Digest::Keccak512->new;
$d->add('any data');
my $result_raw  = $d->digest;     # raw bytes
my $result_hex  = $d->hexdigest;  # hexadecimal form
my $result_b64  = $d->b64digest;  # Base64 form
my $result_b64u = $d->b64udigest; # Base64 URL-safe form

# or hash a file instead
my $file_result_raw = Crypt::Digest::Keccak512->new->addfile('filename.dat')->digest;

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🦋 DESCRIPTION 🦋

Okay so this module provides an interface to the Keccak512 digest algorithm. That's the whole main character energy here: Keccak512, accessible through Perl, slay.

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🎀 EXPORT 🎀

Nothing is exported by default. Zero surprise exports, no cap.

You can export selected functions:

use Crypt::Digest::Keccak512 qw(keccak512 keccak512_hex keccak512_b64 keccak512_b64u
                                    keccak512_file keccak512_file_hex keccak512_file_b64 keccak512_file_b64u);

Or all of them at once:

use Crypt::Digest::Keccak512 ':all';

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💖 FUNCTIONS 💖

keccak512

Joins all arguments into a single string and returns its Keccak512 digest encoded as a binary string. Periodt.

Data arguments for the functional helpers are converted to byte strings using Perl's usual scalar stringification. Defined scalars, including numbers and string-overloaded objects, are accepted. undef is treated as an empty string and may emit Perl's usual "uninitialized value" warning. The same rules apply to keccak512_hex, keccak512_b64, and keccak512_b64u.

my $keccak512_raw = keccak512('data string');
#or
my $keccak512_raw = keccak512('any data', 'more data', 'even more data');

keccak512_hex

Joins all arguments into a single string and returns its Keccak512 digest encoded as a hexadecimal string. Obsessed with the hex vibe.

my $keccak512_hex = keccak512_hex('data string');
#or
my $keccak512_hex = keccak512_hex('any data', 'more data', 'even more data');

keccak512_b64

Joins all arguments into a single string and returns its Keccak512 digest encoded as a Base64 string, with trailing '=' padding. It's giving Base64 but make it padded.

my $keccak512_b64 = keccak512_b64('data string');
#or
my $keccak512_b64 = keccak512_b64('any data', 'more data', 'even more data');

keccak512_b64u

Joins all arguments into a single string and returns its Keccak512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5). URL-safe and unbothered 💅

my $keccak512_b64url = keccak512_b64u('data string');
#or
my $keccak512_b64url = keccak512_b64u('any data', 'more data', 'even more data');

keccak512_file

Reads a file given by a filename or filehandle and returns its Keccak512 digest encoded as a binary string. File-hashing era fr fr.

my $keccak512_raw = keccak512_file('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $keccak512_raw = keccak512_file($filehandle);

keccak512_file_hex

Reads a file given by a filename or filehandle and returns its Keccak512 digest encoded as a hexadecimal string.

my $keccak512_hex = keccak512_file_hex('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $keccak512_hex = keccak512_file_hex($filehandle);

Note: The filehandle must be in binary mode before you pass it to addfile().

keccak512_file_b64

Reads a file given by a filename or filehandle and returns its Keccak512 digest encoded as a Base64 string, with trailing '=' padding.

my $keccak512_b64 = keccak512_file_b64('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $keccak512_b64 = keccak512_file_b64($filehandle);

keccak512_file_b64u

Reads a file given by a filename or filehandle and returns its Keccak512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5).

my $keccak512_b64url = keccak512_file_b64u('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $keccak512_b64url = keccak512_file_b64u($filehandle);

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🫶 METHODS 🫶

The OO interface provides the same set of functions as Crypt::Digest. Unless noted otherwise, assume $d is an existing digest object created via new, for example:

my $d = Crypt::Digest::Keccak512->new();

new

my $d = Crypt::Digest::Keccak512->new();

clone

$d->clone();

reset

$d->reset();

add

Appends data to the message. Returns the object itself (for chaining).

Each argument is converted to bytes using Perl's usual scalar stringification. Defined scalars, including numbers and string-overloaded objects, are accepted. undef is treated as an empty string and may emit Perl's usual "uninitialized value" warning.

$d->add('any data');
#or
$d->add('any data', 'more data', 'even more data');

addfile

Reads the file content and appends it to the message. Returns the object itself (for chaining).

$d->addfile('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
$d->addfile($filehandle);

hashsize

$d->hashsize;
#or
Crypt::Digest::Keccak512->hashsize();
#or
Crypt::Digest::Keccak512::hashsize();

digest

Returns the binary digest (raw bytes). The first call finalizes the digest object.

Any later add(), addfile(), digest(), hexdigest(), b64digest(), or b64udigest() call will fail until you call reset().

my $result_raw = $d->digest();

hexdigest

Returns the digest encoded as a lowercase hexadecimal string. Like digest(), the first call finalizes the digest object.

my $result_hex = $d->hexdigest();

b64digest

Returns the digest encoded as a Base64 string with trailing "=" padding. Like digest(), the first call finalizes the digest object.

my $result_b64 = $d->b64digest();

b64udigest

Returns the digest encoded as a Base64 URL-safe string (no trailing "="). Like digest(), the first call finalizes the digest object.

my $result_b64url = $d->b64udigest();

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🌈 SEE ALSO 🌈

• CryptX, Crypt::Digest
• <https://keccak.team/index.html>

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okay bye bestie! this page’s footer energy is perl v5.42.0, dated 2026-05-11, and it signs off as Crypt::...ccak512(3) 💅✨