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# ex:ts=8 sw=4:
# $OpenBSD: md5.pm,v 1.19 2023/05/16 14:29:20 espie Exp $
#
# Copyright (c) 2003-2007 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
# XXX even though there is ONE current implementation of OpenBSD::digest
# (SHA256) we keep the framework open in case we ever need to switch,
# as we did in the past with md5 -> sha256
package OpenBSD::digest;
sub new
{
my ($class, $filename) = @_;
$class = ref($class) || $class;
my $digest = $class->digest_file($filename);
bless \$digest, $class;
}
sub key
{
my $self = shift;
return $$self;
}
sub write
{
my ($self, $fh) = @_;
print $fh "\@", $self->keyword, " ", $self->stringize, "\n";
}
sub digest_file
{
my ($self, $fname) = @_;
my $d = $self->algo;
eval {
$d->addfile($fname);
};
if ($@) {
$@ =~ s/\sat.*//;
die "can't compute ", $self->keyword, " on $fname: $@";
}
return $d->digest;
}
sub fromstring
{
my ($class, $arg) = @_;
$class = ref($class) || $class;
my $d = $class->unstringize($arg);
bless \$d, $class;
}
sub equals
{
my ($a, $b) = @_;
return ref($a) eq ref($b) && $$a eq $$b;
}
package OpenBSD::sha;
our @ISA=(qw(OpenBSD::digest));
use Digest::SHA;
use MIME::Base64;
sub algo
{
my $self = shift;
return Digest::SHA->new(256);
}
sub stringize
{
my $self = shift;
return encode_base64($$self, '');
}
sub unstringize
{
my ($class, $arg) = @_;
if ($arg =~ /^[0-9a-f]{64}$/i) {
return pack('H*', $arg);
}
return decode_base64($arg);
}
sub keyword
{
return "sha";
}
1;
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