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.IX Title "Crypt::Mac::BLAKE2b 3pm"
.TH Crypt::Mac::BLAKE2b 3pm 2024-03-07 "perl v5.38.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH NAME
Crypt::Mac::BLAKE2b \- Message authentication code BLAKE2b MAC (RFC 7693)
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\&   ### Functional interface:
\&   use Crypt::Mac::BLAKE2b qw( blake2b blake2b_hex );
\&
\&   # calculate MAC from string/buffer
\&   $blake2b_raw  = blake2b($size, $key, \*(Aqdata buffer\*(Aq);
\&   $blake2b_hex  = blake2b_hex($size, $key, \*(Aqdata buffer\*(Aq);
\&   $blake2b_b64  = blake2b_b64($size, $key, \*(Aqdata buffer\*(Aq);
\&   $blake2b_b64u = blake2b_b64u($size, $key, \*(Aqdata buffer\*(Aq);
\&
\&   ### OO interface:
\&   use Crypt::Mac::BLAKE2b;
\&
\&   $d = Crypt::Mac::BLAKE2b\->new($size, $key);
\&   $d\->add(\*(Aqany data\*(Aq);
\&   $d\->addfile(\*(Aqfilename.dat\*(Aq);
\&   $d\->addfile(*FILEHANDLE);
\&   $result_raw  = $d\->mac;     # raw bytes
\&   $result_hex  = $d\->hexmac;  # hexadecimal form
\&   $result_b64  = $d\->b64mac;  # Base64 form
\&   $result_b64u = $d\->b64umac; # Base64 URL Safe form
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Provides an interface to the BLAKE2b message authentication code (MAC) algorithm.
.SH EXPORT
.IX Header "EXPORT"
Nothing is exported by default.
.PP
You can export selected functions:
.PP
.Vb 1
\&  use Crypt::Mac::BLAKE2b qw(blake2b blake2b_hex );
.Ve
.PP
Or all of them at once:
.PP
.Vb 1
\&  use Crypt::Mac::BLAKE2b \*(Aq:all\*(Aq;
.Ve
.SH FUNCTIONS
.IX Header "FUNCTIONS"
.SS blake2b
.IX Subsection "blake2b"
Logically joins all arguments into a single string, and returns its BLAKE2b message authentication code encoded as a binary string.
.PP
.Vb 3
\& $blake2b_raw = blake2b($size, $key, \*(Aqdata buffer\*(Aq);
\& #or
\& $blake2b_raw = blake2b($size, $key, \*(Aqany data\*(Aq, \*(Aqmore data\*(Aq, \*(Aqeven more data\*(Aq);
.Ve
.SS blake2b_hex
.IX Subsection "blake2b_hex"
Logically joins all arguments into a single string, and returns its BLAKE2b message authentication code encoded as a hexadecimal string.
.PP
.Vb 3
\& $blake2b_hex = blake2b_hex($size, $key, \*(Aqdata buffer\*(Aq);
\& #or
\& $blake2b_hex = blake2b_hex($size, $key, \*(Aqany data\*(Aq, \*(Aqmore data\*(Aq, \*(Aqeven more data\*(Aq);
.Ve
.SS blake2b_b64
.IX Subsection "blake2b_b64"
Logically joins all arguments into a single string, and returns its BLAKE2b message authentication code encoded as a Base64 string.
.PP
.Vb 3
\& $blake2b_b64 = blake2b_b64($size, $key, \*(Aqdata buffer\*(Aq);
\& #or
\& $blake2b_b64 = blake2b_b64($size, $key, \*(Aqany data\*(Aq, \*(Aqmore data\*(Aq, \*(Aqeven more data\*(Aq);
.Ve
.SS blake2b_b64u
.IX Subsection "blake2b_b64u"
Logically joins all arguments into a single string, and returns its BLAKE2b message authentication code encoded as a Base64 URL Safe string (see RFC 4648 section 5).
.PP
.Vb 3
\& $blake2b_b64url = blake2b_b64u($size, $key, \*(Aqdata buffer\*(Aq);
\& #or
\& $blake2b_b64url = blake2b_b64u($size, $key, \*(Aqany data\*(Aq, \*(Aqmore data\*(Aq, \*(Aqeven more data\*(Aq);
.Ve
.SH METHODS
.IX Header "METHODS"
.SS new
.IX Subsection "new"
.Vb 1
\& $d = Crypt::Mac::BLAKE2b\->new($size, $key);
.Ve
.SS clone
.IX Subsection "clone"
.Vb 1
\& $d\->clone();
.Ve
.SS reset
.IX Subsection "reset"
.Vb 1
\& $d\->reset();
.Ve
.SS add
.IX Subsection "add"
.Vb 3
\& $d\->add(\*(Aqany data\*(Aq);
\& #or
\& $d\->add(\*(Aqany data\*(Aq, \*(Aqmore data\*(Aq, \*(Aqeven more data\*(Aq);
.Ve
.SS addfile
.IX Subsection "addfile"
.Vb 3
\& $d\->addfile(\*(Aqfilename.dat\*(Aq);
\& #or
\& $d\->addfile(*FILEHANDLE);
.Ve
.SS mac
.IX Subsection "mac"
.Vb 1
\& $result_raw = $d\->mac();
.Ve
.SS hexmac
.IX Subsection "hexmac"
.Vb 1
\& $result_hex = $d\->hexmac();
.Ve
.SS b64mac
.IX Subsection "b64mac"
.Vb 1
\& $result_b64 = $d\->b64mac();
.Ve
.SS b64umac
.IX Subsection "b64umac"
.Vb 1
\& $result_b64url = $d\->b64umac();
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP \(bu 4
CryptX
.IP \(bu 4
<https://tools.ietf.org/html/rfc7693>