File perl-Digest-SHA-PurePerl.spec of Package perl-Digest-SHA-PurePerl

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File perl-Digest-SHA-PurePerl.spec of Package perl-Digest-SHA-PurePerl

#
# spec file for package perl-Digest-SHA-PurePerl
#
# Copyright (c) 2023 SUSE LLC
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.

# Please submit bugfixes or comments via https://bugs.opensuse.org/
#

%define cpan_name Digest-SHA-PurePerl
Name:           perl-Digest-SHA-PurePerl
Version:        6.04
Release:        0
License:        Artistic-1.0 OR GPL-1.0-or-later
Summary:        Perl implementation of SHA-1/224/256/384/512
URL:            https://metacpan.org/release/%{cpan_name}
Source0:        https://cpan.metacpan.org/authors/id/M/MS/MSHELOR/%{cpan_name}-%{version}.tar.gz
Source1:        cpanspec.yml
BuildArch:      noarch
BuildRequires:  perl
BuildRequires:  perl-macros
%{perl_requires}

%description
Digest::SHA::PurePerl is written entirely in Perl. If your platform has a C
compiler, you should install the functionally equivalent (but much faster)
Digest::SHA module.

The programming interface is easy to use: it's the same one found in CPAN's
Digest module. So, if your applications currently use Digest::MD5 and you'd
prefer the stronger security of SHA, it's a simple matter to convert them.

The interface provides two ways to calculate digests: all-at-once, or in
stages. To illustrate, the following short program computes the SHA-256
digest of "hello world" using each approach:

use Digest::SHA::PurePerl qw(sha256_hex);

$data = "hello world";
	@frags = split(//, $data);

# all-at-once (Functional style)
	$digest1 = sha256_hex($data);

# in-stages (OOP style)
	$state = Digest::SHA::PurePerl->new(256);
	for (@frags) { $state->add($_) }
	$digest2 = $state->hexdigest;

print $digest1 eq $digest2 ?
		"whew!\n" : "oops!\n";

To calculate the digest of an n-bit message where _n_ is not a multiple of
8, use the _add_bits()_ method. For example, consider the 446-bit message
consisting of the bit-string "110" repeated 148 times, followed by "11".
Here's how to display its SHA-1 digest:

use Digest::SHA::PurePerl;
	$bits = "110" x 148 . "11";
	$sha = Digest::SHA::PurePerl->new(1)->add_bits($bits);
	print $sha->hexdigest, "\n";

Note that for larger bit-strings, it's more efficient to use the
two-argument version _add_bits($data, $nbits)_, where _$data_ is in the
customary packed binary format used for Perl strings.

The module also lets you save intermediate SHA states to a string. The
_getstate()_ method generates portable, human-readable text describing the
current state of computation. You can subsequently restore that state with
_putstate()_ to resume where the calculation left off.

To see what a state description looks like, just run the following:

use Digest::SHA::PurePerl;
	print Digest::SHA::PurePerl->new->add("Shaw" x 1962)->getstate;

As an added convenience, the Digest::SHA::PurePerl module offers routines
to calculate keyed hashes using the HMAC-SHA-1/224/256/384/512 algorithms.
These services exist in functional form only, and mimic the style and
behavior of the _sha()_, _sha_hex()_, and _sha_base64()_ functions.

# Test vector from draft-ietf-ipsec-ciph-sha-256-01.txt

use Digest::SHA::PurePerl qw(hmac_sha256_hex);
	print hmac_sha256_hex("Hi There", chr(0x0b) x 32), "\n";

%prep
%autosetup  -n %{cpan_name}-%{version}

%build
perl Makefile.PL INSTALLDIRS=vendor
%make_build

%check
make test

%install
%perl_make_install
%perl_process_packlist
%perl_gen_filelist

%files -f %{name}.files
%doc Changes examples README shasumpp

%changelog

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