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_file sha256_file_hex sha256_file_b64 );
# calculate digest from string/buffer
$sha256_raw = sha256('data string');
$sha256_hex = sha256_hex('data string');
$sha256_b64 = sha256_b64('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');
# calculate digest from filehandle
$sha256_raw = sha256_file(*FILEHANDLE);
$sha256_hex = sha256_file_hex(*FILEHANDLE);
$sha256_b64 = sha256_file_b64(*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 formDESCRIPTION
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_file sha256_file_hex sha256_file_b64);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_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);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->addfile('filename.dat');
#or
$d->addfile(*FILEHANDLE);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();