42 lines
697 B
Perl
42 lines
697 B
Perl
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#! /usr/bin/perl
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use strict;
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use warnings;
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use 5.010;
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use autodie;
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use Digest::SHA;
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use MIME::Base64;
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use constant WAIT_BEGIN => 1;
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use constant WAIT_END =>2;
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sub usage {
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say STDERR "$0 DNS-LABEL CERT-FILE";
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exit(1);
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}
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usage() if (scalar(@ARGV) != 2);
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my $state = WAIT_BEGIN;
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my $pem = '';
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open(my $fh, '<', $ARGV[1]);
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while(my $line = <$fh>) {
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if ($state == WAIT_BEGIN) {
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if ($line=~/^-----BEGIN CERTIFICATE-----/) {
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$state = WAIT_END;
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}
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} elsif ($state == WAIT_END) {
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if ($line=~/^-----END CERTIFICATE-----/) {
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last;
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} else {
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$pem.=$line;
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}
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}
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}
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close($fh);
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say $ARGV[0], ' IN TLSA 1 0 1 ', Digest::SHA::sha256_hex(decode_base64($pem));
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#say $pem;
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