Crypt::...::SHA512(3)

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

🎀 NAME 🎀

Crypt::Digest::SHA512 — hash function SHA-512 [size: 512 bits]. Bestie, this is the Crypt::...::SHA512(3) manual page from User Contributed Perl Documentation, and it's here to make SHA-512 make sense. 💅

✨ SYNOPSIS ✨

Okay so here's the whole vibe in code — functional interface first, then OO. No cap, these calls are exact:

          ### Functional interface:
          use Crypt::Digest::SHA512 qw( sha512 sha512_hex sha512_b64 sha512_b64u
                                       sha512_file sha512_file_hex sha512_file_b64 sha512_file_b64u );

          # calculate digest from string/buffer
          my $data = 'data string';
          my $sha512_raw  = sha512($data);
          my $sha512_hex  = sha512_hex($data);
          my $sha512_b64  = sha512_b64($data);
          my $sha512_b64u = sha512_b64u($data);
          # or from file
          my $sha512_file_raw  = sha512_file('filename.dat');
          my $sha512_file_hex  = sha512_file_hex('filename.dat');
          my $sha512_file_b64  = sha512_file_b64('filename.dat');
          my $sha512_file_b64u = sha512_file_b64u('filename.dat');
          # or from filehandle
          my $filehandle = ...; # existing binary-mode filehandle
          my $sha512_fh_raw  = sha512_file($filehandle);
          my $sha512_fh_hex  = sha512_file_hex($filehandle);
          my $sha512_fh_b64  = sha512_file_b64($filehandle);
          my $sha512_fh_b64u = sha512_file_b64u($filehandle);

          ### OO interface:
          use Crypt::Digest::SHA512;

          my $d = Crypt::Digest::SHA512->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::SHA512->new->addfile('filename.dat')->digest;

💖 DESCRIPTION 💖

This module hands you an interface to the SHA512 digest algorithm. That's the whole tea. 🫖

🎁 EXPORT 🎁

Nothing is exported by default. Zero, nada, zip. 🙈

You can export selected functions:

         use Crypt::Digest::SHA512 qw(sha512 sha512_hex sha512_b64 sha512_b64u
                                             sha512_file sha512_file_hex sha512_file_b64 sha512_file_b64u);

Or all of them at once:

         use Crypt::Digest::SHA512 ':all';

🌸 FUNCTIONS 🌸

🧚 sha512

Joins all arguments into a single string and returns its SHA512 digest encoded as a binary string. Raw bytes, bestie. 🫶

Heads up: data arguments for the functional helpers get converted to byte strings using Perl's usual scalar stringification. Defined scalars are accepted, including numbers and string-overloaded objects. undef is treated as an empty string and may emit Perl's usual "uninitialized value" warning. The same rules apply to sha512_hex, sha512_b64, and sha512_b64u.

        my $sha512_raw = sha512('data string');
        #or
        my $sha512_raw = sha512('any data', 'more data', 'even more data');

🧚 sha512_hex

Joins all arguments into a single string and returns its SHA512 digest encoded as a hexadecimal string. Hex girl summer. 🌈

        my $sha512_hex = sha512_hex('data string');
        #or
        my $sha512_hex = sha512_hex('any data', 'more data', 'even more data');

🧚 sha512_b64

Joins all arguments into a single string and returns its SHA512 digest encoded as a Base64 string, with trailing '=' padding. Very demure, very padded. 🎀

        my $sha512_b64 = sha512_b64('data string');
        #or
        my $sha512_b64 = sha512_b64('any data', 'more data', 'even more data');

🧚 sha512_b64u

Joins all arguments into a single string and returns its SHA512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5). URL-safe and unbothered. 🦋

        my $sha512_b64url = sha512_b64u('data string');
        #or
        my $sha512_b64url = sha512_b64u('any data', 'more data', 'even more data');

🧚 sha512_file

Reads a file given by a filename or filehandle and returns its SHA512 digest encoded as a binary string. File mode activated. 🔥

        my $sha512_raw = sha512_file('filename.dat');
        #or
        my $filehandle = ...; # existing binary-mode filehandle
        my $sha512_raw = sha512_file($filehandle);

🧚 sha512_file_hex

Reads a file given by a filename or filehandle and returns its SHA512 digest encoded as a hexadecimal string.

        my $sha512_hex = sha512_file_hex('filename.dat');
        #or
        my $filehandle = ...; # existing binary-mode filehandle
        my $sha512_hex = sha512_file_hex($filehandle);
Note: The filehandle must be in binary mode before you pass it to addfile().

🧚 sha512_file_b64

Reads a file given by a filename or filehandle and returns its SHA512 digest encoded as a Base64 string, with trailing '=' padding.

        my $sha512_b64 = sha512_file_b64('filename.dat');
        #or
        my $filehandle = ...; # existing binary-mode filehandle
        my $sha512_b64 = sha512_file_b64($filehandle);

🧚 sha512_file_b64u

Reads a file given by a filename or filehandle and returns its SHA512 digest encoded as a Base64 URL-safe string (see RFC 4648 section 5).

        my $sha512_b64url = sha512_file_b64u('filename.dat');
        #or
        my $filehandle = ...; # existing binary-mode filehandle
        my $sha512_b64url = sha512_file_b64u($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::SHA512->new();

🧚 new

        my $d = Crypt::Digest::SHA512->new();

🧚 clone

        $d->clone();

🧚 reset

        $d->reset();

🧚 add

Appends data to the message. Returns the object itself (for chaining). Chaining is main character energy. 👑

Each argument is converted to bytes using Perl's usual scalar stringification. Defined scalars are accepted, including numbers and string-overloaded objects. 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

Size check, bestie:

        $d->hashsize;
        #or
        Crypt::Digest::SHA512->hashsize();
        #or
        Crypt::Digest::SHA512::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(). So don't play yourself. 💀

        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 🌈

Cute sign-off: source/version is perl v5.42.0, date is 2026-05-11, and the page is Crypt::...::SHA512(3). Stay hashy, bestie 💜

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