Crypt::...E2b_384(3)

🌸 NAME 🌸

okay so this page is Crypt::...E2b_384(3) from the User Contributed Perl Documentation, and the actual module is Crypt::Digest::BLAKE2b_384 — Hash function BLAKE2b [size: 384 bits]. 💜

✨ SYNOPSIS ✨

bestie, here’s the whole call-me-by-my-name situation. Functional interface first:

### Functional interface:
use Crypt::Digest::BLAKE2b_384 qw( blake2b_384 blake2b_384_hex blake2b_384_b64 blake2b_384_b64u
                             blake2b_384_file blake2b_384_file_hex blake2b_384_file_b64 blake2b_384_file_b64u );

# calculate digest from string/buffer
my $data = 'data string';
my $blake2b_384_raw  = blake2b_384($data);
my $blake2b_384_hex  = blake2b_384_hex($data);
my $blake2b_384_b64  = blake2b_384_b64($data);
my $blake2b_384_b64u = blake2b_384_b64u($data);
# or from file
my $blake2b_384_file_raw  = blake2b_384_file('filename.dat');
my $blake2b_384_file_hex  = blake2b_384_file_hex('filename.dat');
my $blake2b_384_file_b64  = blake2b_384_file_b64('filename.dat');
my $blake2b_384_file_b64u = blake2b_384_file_b64u('filename.dat');
# or from filehandle
my $filehandle = ...; # existing binary-mode filehandle
my $blake2b_384_fh_raw  = blake2b_384_file($filehandle);
my $blake2b_384_fh_hex  = blake2b_384_file_hex($filehandle);
my $blake2b_384_fh_b64  = blake2b_384_file_b64($filehandle);
my $blake2b_384_fh_b64u = blake2b_384_file_b64u($filehandle);

and the OO interface is giving main-character energy too:

### OO interface:
use Crypt::Digest::BLAKE2b_384;

my $d = Crypt::Digest::BLAKE2b_384->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::BLAKE2b_384->new->addfile('filename.dat')->digest;

🦋 DESCRIPTION 🦋

This module provides an interface to the BLAKE2b_384 digest algorithm. that’s the whole assignment, and it ate. 💅

🎀 EXPORT 🎀

Nothing is exported by default. not even one little function, bestie.

You can export selected functions:

use Crypt::Digest::BLAKE2b_384 qw(blake2b_384 blake2b_384_hex blake2b_384_b64 blake2b_384_b64u
                                    blake2b_384_file blake2b_384_file_hex blake2b_384_file_b64 blake2b_384_file_b64u);

Or all of them at once:

use Crypt::Digest::BLAKE2b_384 ':all';

🧚 FUNCTIONS 🧚

🌟 blake2b_384

Joins all arguments into a single string and returns its BLAKE2b_384 digest encoded as a binary string. ✨

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 blake2b_384_hex, blake2b_384_b64, and blake2b_384_b64u. fr fr.

my $blake2b_384_raw = blake2b_384('data string');
#or
my $blake2b_384_raw = blake2b_384('any data', 'more data', 'even more data');

🌟 blake2b_384_hex

Joins all arguments into a single string and returns its BLAKE2b_384 digest encoded as a hexadecimal string. 🎀

my $blake2b_384_hex = blake2b_384_hex('data string');
#or
my $blake2b_384_hex = blake2b_384_hex('any data', 'more data', 'even more data');

🌟 blake2b_384_b64

Joins all arguments into a single string and returns its BLAKE2b_384 digest encoded as a Base64 string, with trailing '=' padding. 🍓

my $blake2b_384_b64 = blake2b_384_b64('data string');
#or
my $blake2b_384_b64 = blake2b_384_b64('any data', 'more data', 'even more data');

🌟 blake2b_384_b64u

Joins all arguments into a single string and returns its BLAKE2b_384 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5). 🌈

my $blake2b_384_b64url = blake2b_384_b64u('data string');
#or
my $blake2b_384_b64url = blake2b_384_b64u('any data', 'more data', 'even more data');

🌟 blake2b_384_file

Reads a file given by a filename or filehandle and returns its BLAKE2b_384 digest encoded as a binary string. 🦋

my $blake2b_384_raw = blake2b_384_file('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2b_384_raw = blake2b_384_file($filehandle);

🌟 blake2b_384_file_hex

Reads a file given by a filename or filehandle and returns its BLAKE2b_384 digest encoded as a hexadecimal string. 💜

my $blake2b_384_hex = blake2b_384_file_hex('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2b_384_hex = blake2b_384_file_hex($filehandle);

Note: The filehandle must be in binary mode before you pass it to addfile(). no cap, do not skip this.

🌟 blake2b_384_file_b64

Reads a file given by a filename or filehandle and returns its BLAKE2b_384 digest encoded as a Base64 string, with trailing '=' padding. 🎀

my $blake2b_384_b64 = blake2b_384_file_b64('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2b_384_b64 = blake2b_384_file_b64($filehandle);

🌟 blake2b_384_file_b64u

Reads a file given by a filename or filehandle and returns its BLAKE2b_384 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5). ✨

my $blake2b_384_b64url = blake2b_384_file_b64u('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2b_384_b64url = blake2b_384_file_b64u($filehandle);

---

👑 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::BLAKE2b_384->new();

💫 new

my $d = Crypt::Digest::BLAKE2b_384->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

three ways to ask, bestie:

$d->hashsize;
#or
Crypt::Digest::BLAKE2b_384->hashsize();
#or
Crypt::Digest::BLAKE2b_384::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();

💖 SEE ALSO 💖

• CryptX, Crypt::Digest
• <https://blake2.net/>
• <https://www.rfc-editor.org/rfc/rfc7693>

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that’s the whole page, bestie — go hash something iconic. 🧚 sign-off: perl v5.42.0 · 2026-05-11 · Crypt::...E2b_384(3) 💖