Crypt::Digest::SHA256

(source, CPAN)

version 0.084

NAME
SYNOPSIS
DESCRIPTION
EXPORT
FUNCTIONS
METHODS
- new
- clone
- reset
- add
- addfile
- add_bits
- hashsize
- digest
- hexdigest
- b64digest
- b64udigest
SEE ALSO

#NAME

Crypt::Digest::SHA256 - Hash function SHA-256 [size: 256 bits]

#SYNOPSIS

### Functional interface:
use Crypt::Digest::SHA256 qw( sha256 sha256_hex sha256_b64 sha256_b64u
                             sha256_file sha256_file_hex sha256_file_b64 sha256_file_b64u );

# calculate digest from string/buffer
$sha256_raw  = sha256('data string');
$sha256_hex  = sha256_hex('data string');
$sha256_b64  = sha256_b64('data string');
$sha256_b64u = sha256_b64u('data string');
# calculate digest from file
$sha256_raw  = sha256_file('filename.dat');
$sha256_hex  = sha256_file_hex('filename.dat');
$sha256_b64  = sha256_file_b64('filename.dat');
$sha256_b64u = sha256_file_b64u('filename.dat');
# calculate digest from filehandle
$sha256_raw  = sha256_file(*FILEHANDLE);
$sha256_hex  = sha256_file_hex(*FILEHANDLE);
$sha256_b64  = sha256_file_b64(*FILEHANDLE);
$sha256_b64u = sha256_file_b64u(*FILEHANDLE);

### OO interface:
use Crypt::Digest::SHA256;

$d = Crypt::Digest::SHA256->new;
$d->add('any data');
$d->addfile('filename.dat');
$d->addfile(*FILEHANDLE);
$result_raw  = $d->digest;     # raw bytes
$result_hex  = $d->hexdigest;  # hexadecimal form
$result_b64  = $d->b64digest;  # Base64 form
$result_b64u = $d->b64udigest; # Base64 URL Safe form

#DESCRIPTION

Provides an interface to the SHA256 digest algorithm.

#EXPORT

Nothing is exported by default.

You can export selected functions:

use Crypt::Digest::SHA256 qw(sha256 sha256_hex sha256_b64 sha256_b64u
                                    sha256_file sha256_file_hex sha256_file_b64 sha256_file_b64u);

Or all of them at once:

use Crypt::Digest::SHA256 ':all';

#FUNCTIONS

#sha256

Logically joins all arguments into a single string, and returns its SHA256 digest encoded as a binary string.

$sha256_raw = sha256('data string');
#or
$sha256_raw = sha256('any data', 'more data', 'even more data');

#sha256_hex

Logically joins all arguments into a single string, and returns its SHA256 digest encoded as a hexadecimal string.

$sha256_hex = sha256_hex('data string');
#or
$sha256_hex = sha256_hex('any data', 'more data', 'even more data');

#sha256_b64

Logically joins all arguments into a single string, and returns its SHA256 digest encoded as a Base64 string, with trailing '=' padding.

$sha256_b64 = sha256_b64('data string');
#or
$sha256_b64 = sha256_b64('any data', 'more data', 'even more data');

#sha256_b64u

Logically joins all arguments into a single string, and returns its SHA256 digest encoded as a Base64 URL Safe string (see RFC 4648 section 5).

$sha256_b64url = sha256_b64u('data string');
#or
$sha256_b64url = sha256_b64u('any data', 'more data', 'even more data');

#sha256_file

Reads file (defined by filename or filehandle) content, and returns its SHA256 digest encoded as a binary string.

$sha256_raw = sha256_file('filename.dat');
#or
$sha256_raw = sha256_file(*FILEHANDLE);

#sha256_file_hex

Reads file (defined by filename or filehandle) content, and returns its SHA256 digest encoded as a hexadecimal string.

$sha256_hex = sha256_file_hex('filename.dat');
#or
$sha256_hex = sha256_file_hex(*FILEHANDLE);

BEWARE: You have to make sure that the filehandle is in binary mode before you pass it as argument to the addfile() method.

#sha256_file_b64

Reads file (defined by filename or filehandle) content, and returns its SHA256 digest encoded as a Base64 string, with trailing '=' padding.

$sha256_b64 = sha256_file_b64('filename.dat');
#or
$sha256_b64 = sha256_file_b64(*FILEHANDLE);

#sha256_file_b64u

Reads file (defined by filename or filehandle) content, and returns its SHA256 digest encoded as a Base64 URL Safe string (see RFC 4648 section 5).

$sha256_b64url = sha256_file_b64u('filename.dat');
#or
$sha256_b64url = sha256_file_b64u(*FILEHANDLE);

#METHODS

The OO interface provides the same set of functions as Crypt::Digest.

#new

$d = Crypt::Digest::SHA256->new();

#clone

$d->clone();

#reset

$d->reset();

#add

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

#addfile

$d->addfile('filename.dat');
#or
$d->addfile(*FILEHANDLE);

#add_bits

$d->add_bits($bit_string);   # e.g. $d->add_bits("111100001010");
#or
$d->add_bits($data, $nbits); # e.g. $d->add_bits("\xF0\xA0", 16);

#hashsize

$d->hashsize;
#or
Crypt::Digest::SHA256->hashsize();
#or
Crypt::Digest::SHA256::hashsize();

#digest

$result_raw = $d->digest();

#hexdigest

$result_hex = $d->hexdigest();

#b64digest

$result_b64 = $d->b64digest();

#b64udigest

$result_b64url = $d->b64udigest();

CONTENTS