Crypt::...E2s_160(3)

okay bestie, welcome to Crypt::...E2s_160(3) from the User Contributed Perl Documentation crew — it’s the manual for Crypt::Digest::BLAKE2s_160, aka the BLAKE2s hash with a 160-bit size. Buckle up, it’s giving crypto but make it cute. 💖

✨ NAME ✨

Crypt::Digest::BLAKE2s_160 — Hash function BLAKE2s [size: 160 bits]

---

🦋 SYNOPSIS 🦋

### Functional interface:
use Crypt::Digest::BLAKE2s_160 qw( blake2s_160 blake2s_160_hex blake2s_160_b64 blake2s_160_b64u
                             blake2s_160_file blake2s_160_file_hex blake2s_160_file_b64 blake2s_160_file_b64u );

# calculate digest from string/buffer
my $data = 'data string';
my $blake2s_160_raw  = blake2s_160($data);
my $blake2s_160_hex  = blake2s_160_hex($data);
my $blake2s_160_b64  = blake2s_160_b64($data);
my $blake2s_160_b64u = blake2s_160_b64u($data);
# or from file
my $blake2s_160_file_raw  = blake2s_160_file('filename.dat');
my $blake2s_160_file_hex  = blake2s_160_file_hex('filename.dat');
my $blake2s_160_file_b64  = blake2s_160_file_b64('filename.dat');
my $blake2s_160_file_b64u = blake2s_160_file_b64u('filename.dat');
# or from filehandle
my $filehandle = ...; # existing binary-mode filehandle
my $blake2s_160_fh_raw  = blake2s_160_file($filehandle);
my $blake2s_160_fh_hex  = blake2s_160_file_hex($filehandle);
my $blake2s_160_fh_b64  = blake2s_160_file_b64($filehandle);
my $blake2s_160_fh_b64u = blake2s_160_file_b64u($filehandle);

### OO interface:
use Crypt::Digest::BLAKE2s_160;

my $d = Crypt::Digest::BLAKE2s_160->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::BLAKE2s_160->new->addfile('filename.dat')->digest;

---

🌸 DESCRIPTION 🌸

It provides an interface to the BLAKE2s_160 digest algorithm. That’s the whole vibe check: you get a Perl-y doorway into BLAKE2s_160, and it’s ready to go. ✨

---

🎀 EXPORT 🎀

By default? Nothing is exported. Zero. Nada. 🫶

You can export selected functions, though:

use Crypt::Digest::BLAKE2s_160 qw(blake2s_160 blake2s_160_hex blake2s_160_b64 blake2s_160_b64u
                                    blake2s_160_file blake2s_160_file_hex blake2s_160_file_b64 blake2s_160_file_b64u);

Or all of them at once, because sometimes you just want the whole menu:

use Crypt::Digest::BLAKE2s_160 ':all';

---

💜 FUNCTIONS 💜

🧚 blake2s_160

Joins all arguments into a single string and returns its BLAKE2s_160 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 blake2s_160_hex, blake2s_160_b64, and blake2s_160_b64u.

my $blake2s_160_raw = blake2s_160('data string');
#or
my $blake2s_160_raw = blake2s_160('any data', 'more data', 'even more data');

🌈 blake2s_160_hex

Joins all arguments into a single string and returns its BLAKE2s_160 digest encoded as a hexadecimal string. lowercase hex form, coming right up. 💅

my $blake2s_160_hex = blake2s_160_hex('data string');
#or
my $blake2s_160_hex = blake2s_160_hex('any data', 'more data', 'even more data');

🍓 blake2s_160_b64

Joins all arguments into a single string and returns its BLAKE2s_160 digest encoded as a Base64 string, with trailing = padding.

my $blake2s_160_b64 = blake2s_160_b64('data string');
#or
my $blake2s_160_b64 = blake2s_160_b64('any data', 'more data', 'even more data');

🦋 blake2s_160_b64u

Joins all arguments into a single string and returns its BLAKE2s_160 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5).

my $blake2s_160_b64url = blake2s_160_b64u('data string');
#or
my $blake2s_160_b64url = blake2s_160_b64u('any data', 'more data', 'even more data');

🧸 blake2s_160_file

Reads a file given by a filename or filehandle and returns its BLAKE2s_160 digest encoded as a binary string.

my $blake2s_160_raw = blake2s_160_file('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2s_160_raw = blake2s_160_file($filehandle);

✨ blake2s_160_file_hex

Reads a file given by a filename or filehandle and returns its BLAKE2s_160 digest encoded as a hexadecimal string.

my $blake2s_160_hex = blake2s_160_file_hex('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2s_160_hex = blake2s_160_file_hex($filehandle);

Note: The filehandle must be in binary mode before you pass it to addfile(). no cap, bestie. 🔥

🎀 blake2s_160_file_b64

Reads a file given by a filename or filehandle and returns its BLAKE2s_160 digest encoded as a Base64 string, with trailing = padding.

my $blake2s_160_b64 = blake2s_160_file_b64('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2s_160_b64 = blake2s_160_file_b64($filehandle);

🌟 blake2s_160_file_b64u

Reads a file given by a filename or filehandle and returns its BLAKE2s_160 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5).

my $blake2s_160_b64url = blake2s_160_file_b64u('filename.dat');
#or
my $filehandle = ...; # existing binary-mode filehandle
my $blake2s_160_b64url = blake2s_160_file_b64u($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::BLAKE2s_160->new();

💫 new

my $d = Crypt::Digest::BLAKE2s_160->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::BLAKE2s_160->hashsize();
#or
Crypt::Digest::BLAKE2s_160::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. perl v5.42.0 · 2026-05-11 · filed under Crypt::...E2s_160(3). Now go hash something (responsibly) 💅✨