Crypt::...E2b_512(3)

📦
version 0.89.0 · 16 versions
, in opensuse-leap 16.0

💖 NAME 💖

okay bestie, welcome to the Crypt::...E2b_512(3) page — it lives under User Contributed Perl Documentation, and it's all about Crypt::Digest::BLAKE2b_512, the hash function BLAKE2b [size: 512 bits]. no cap, that's the whole name vibe. 🦋

✨ SYNOPSIS ✨

here's the group-chat recap: functional interface first, then OO interface. copy these exactly, iykyk:

       ### Functional interface:
       use Crypt::Digest::BLAKE2b_512 qw( blake2b_512 blake2b_512_hex blake2b_512_b64 blake2b_512_b64u
                                    blake2b_512_file blake2b_512_file_hex blake2b_512_file_b64 blake2b_512_file_b64u );

       # calculate digest from string/buffer
       my $data = 'data string';
       my $blake2b_512_raw  = blake2b_512($data);
       my $blake2b_512_hex  = blake2b_512_hex($data);
       my $blake2b_512_b64  = blake2b_512_b64($data);
       my $blake2b_512_b64u = blake2b_512_b64u($data);
       # or from file
       my $blake2b_512_file_raw  = blake2b_512_file('filename.dat');
       my $blake2b_512_file_hex  = blake2b_512_file_hex('filename.dat');
       my $blake2b_512_file_b64  = blake2b_512_file_b64('filename.dat');
       my $blake2b_512_file_b64u = blake2b_512_file_b64u('filename.dat');
       # or from filehandle
       my $filehandle = ...; # existing binary-mode filehandle
       my $blake2b_512_fh_raw  = blake2b_512_file($filehandle);
       my $blake2b_512_fh_hex  = blake2b_512_file_hex($filehandle);
       my $blake2b_512_fh_b64  = blake2b_512_file_b64($filehandle);
       my $blake2b_512_fh_b64u = blake2b_512_file_b64u($filehandle);

       ### OO interface:
       use Crypt::Digest::BLAKE2b_512;

       my $d = Crypt::Digest::BLAKE2b_512->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_512->new->addfile('filename.dat')->digest;

🌸 DESCRIPTION 🌸

it provides an interface to the BLAKE2b_512 digest algorithm. that's the description, and honestly it understood the assignment. 💅

🎀 EXPORT 🎀

nothing is exported by default. as it should be, main character boundaries and all that.

you can export selected functions:

  use Crypt::Digest::BLAKE2b_512 qw(blake2b_512 blake2b_512_hex blake2b_512_b64 blake2b_512_b64u
                                      blake2b_512_file blake2b_512_file_hex blake2b_512_file_b64 blake2b_512_file_b64u);

or all of them at once:

  use Crypt::Digest::BLAKE2b_512 ':all';

🔥 FUNCTIONS 🔥

💫 blake2b_512

joins all arguments into a single string and returns its BLAKE2b_512 digest encoded as a binary string. raw bytes, no filter, 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 blake2b_512_hex, blake2b_512_b64, and blake2b_512_b64u.

 my $blake2b_512_raw = blake2b_512('data string');
 #or
 my $blake2b_512_raw = blake2b_512('any data', 'more data', 'even more data');

💫 blake2b_512_hex

joins all arguments into a single string and returns its BLAKE2b_512 digest encoded as a hexadecimal string. hex girl summer.

 my $blake2b_512_hex = blake2b_512_hex('data string');
 #or
 my $blake2b_512_hex = blake2b_512_hex('any data', 'more data', 'even more data');

💫 blake2b_512_b64

joins all arguments into a single string and returns its BLAKE2b_512 digest encoded as a Base64 string, with trailing = padding.

 my $blake2b_512_b64 = blake2b_512_b64('data string');
 #or
 my $blake2b_512_b64 = blake2b_512_b64('any data', 'more data', 'even more data');

💫 blake2b_512_b64u

joins all arguments into a single string and returns its BLAKE2b_512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5). url-safe and unbothered.

 my $blake2b_512_b64url = blake2b_512_b64u('data string');
 #or
 my $blake2b_512_b64url = blake2b_512_b64u('any data', 'more data', 'even more data');

💫 blake2b_512_file

reads a file given by a filename or filehandle and returns its BLAKE2b_512 digest encoded as a binary string.

 my $blake2b_512_raw = blake2b_512_file('filename.dat');
 #or
 my $filehandle = ...; # existing binary-mode filehandle
 my $blake2b_512_raw = blake2b_512_file($filehandle);

💫 blake2b_512_file_hex

reads a file given by a filename or filehandle and returns its BLAKE2b_512 digest encoded as a hexadecimal string.

 my $blake2b_512_hex = blake2b_512_file_hex('filename.dat');
 #or
 my $filehandle = ...; # existing binary-mode filehandle
 my $blake2b_512_hex = blake2b_512_file_hex($filehandle);
⚠️ note bestie: the filehandle must be in binary mode before you pass it to addfile().

💫 blake2b_512_file_b64

reads a file given by a filename or filehandle and returns its BLAKE2b_512 digest encoded as a Base64 string, with trailing = padding.

 my $blake2b_512_b64 = blake2b_512_file_b64('filename.dat');
 #or
 my $filehandle = ...; # existing binary-mode filehandle
 my $blake2b_512_b64 = blake2b_512_file_b64($filehandle);

💫 blake2b_512_file_b64u

reads a file given by a filename or filehandle and returns its BLAKE2b_512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5).

 my $blake2b_512_b64url = blake2b_512_file_b64u('filename.dat');
 #or
 my $filehandle = ...; # existing binary-mode filehandle
 my $blake2b_512_b64url = blake2b_512_file_b64u($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_512->new();

🌈 new

 my $d = Crypt::Digest::BLAKE2b_512->new();

🌈 clone

 $d->clone();

🌈 reset

 $d->reset();

🌈 add

appends data to the message. returns the object itself (for chaining). cute little chain moment.

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 flavors, all here, no notes:

 $d->hashsize;
 #or
 Crypt::Digest::BLAKE2b_512->hashsize();
 #or
 Crypt::Digest::BLAKE2b_512::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(). that's the rule, bestie — don't skip the 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 👑

and that's the page, bestie! this cutie came from perl v5.42.0 on 2026-05-11, and the page tag is Crypt::...E2b_512(3). bye bye, go hash something iconic 💅✨

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