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package Net::DNS::RR::CERT; use strict; use warnings; our $VERSION = (qw$Id: CERT.pm 1856 2021-12-02 14:36:25Z willem $)[2]; use base qw(Net::DNS::RR); =head1 NAME Net::DNS::RR::CERT - DNS CERT resource record =cut use integer; use Carp; use MIME::Base64; my %certtype = ( PKIX => 1, # X.509 as per PKIX SPKI => 2, # SPKI certificate PGP => 3, # OpenPGP packet IPKIX => 4, # The URL of an X.509 data object ISPKI => 5, # The URL of an SPKI certificate IPGP => 6, # The fingerprint and URL of an OpenPGP packet ACPKIX => 7, # Attribute Certificate IACPKIX => 8, # The URL of an Attribute Certificate URI => 253, # URI private OID => 254, # OID private ); sub _decode_rdata { ## decode rdata from wire-format octet string my $self = shift; my ( $data, $offset ) = @_; @{$self}{qw(certtype keytag algorithm)} = unpack "\@$offset n2 C", $$data; $self->{certbin} = substr $$data, $offset + 5, $self->{rdlength} - 5; return; } sub _encode_rdata { ## encode rdata as wire-format octet string my $self = shift; return pack "n2 C a*", $self->certtype, $self->keytag, $self->algorithm, $self->{certbin}; } sub _format_rdata { ## format rdata portion of RR string. my $self = shift; my @param = ( $self->certtype, $self->keytag, $self->algorithm ); my @rdata = ( @param, split /\s+/, encode_base64( $self->{certbin} ) ); return @rdata; } sub _parse_rdata { ## populate RR from rdata in argument list my $self = shift; $self->certtype(shift); $self->keytag(shift); $self->algorithm(shift); $self->cert(@_); return; } sub certtype { my $self = shift; return $self->{certtype} unless scalar @_; my $certtype = shift || 0; return $self->{certtype} = $certtype unless $certtype =~ /\D/; my $typenum = $certtype{$certtype}; $typenum || croak qq[unknown certtype $certtype]; return $self->{certtype} = $typenum; } sub keytag { my $self = shift; $self->{keytag} = 0 + shift if scalar @_; return $self->{keytag} || 0; } sub algorithm { my ( $self, $arg ) = @_; return $self->{algorithm} unless defined $arg; return _algbyval( $self->{algorithm} ) if uc($arg) eq 'MNEMONIC'; return $self->{algorithm} = _algbyname($arg); } sub certificate { return &certbin; } sub certbin { my $self = shift; $self->{certbin} = shift if scalar @_; return $self->{certbin} || ""; } sub cert { my $self = shift; return MIME::Base64::encode( $self->certbin(), "" ) unless scalar @_; return $self->certbin( MIME::Base64::decode( join "", @_ ) ); } sub format { return &certtype; } # uncoverable pod sub tag { return &keytag; } # uncoverable pod ######################################## { my @algbyname = ( 'DELETE' => 0, # [RFC4034][RFC4398][RFC8078] 'RSAMD5' => 1, # [RFC3110][RFC4034] 'DH' => 2, # [RFC2539] 'DSA' => 3, # [RFC3755][RFC2536] ## Reserved => 4, # [RFC6725] 'RSASHA1' => 5, # [RFC3110][RFC4034] 'DSA-NSEC3-SHA1' => 6, # [RFC5155] 'RSASHA1-NSEC3-SHA1' => 7, # [RFC5155] 'RSASHA256' => 8, # [RFC5702] ## Reserved => 9, # [RFC6725] 'RSASHA512' => 10, # [RFC5702] ## Reserved => 11, # [RFC6725] 'ECC-GOST' => 12, # [RFC5933] 'ECDSAP256SHA256' => 13, # [RFC6605] 'ECDSAP384SHA384' => 14, # [RFC6605] 'ED25519' => 15, # [RFC8080] 'ED448' => 16, # [RFC8080] 'INDIRECT' => 252, # [RFC4034] 'PRIVATEDNS' => 253, # [RFC4034] 'PRIVATEOID' => 254, # [RFC4034] ## Reserved => 255, # [RFC4034] ); my %algbyval = reverse @algbyname; foreach (@algbyname) { s/[\W_]//g; } # strip non-alphanumerics my @algrehash = map { /^\d/ ? ($_) x 3 : uc($_) } @algbyname; my %algbyname = @algrehash; # work around broken cperl sub _algbyname { my $arg = shift; my $key = uc $arg; # synthetic key $key =~ s/[\W_]//g; # strip non-alphanumerics my $val = $algbyname{$key}; return $val if defined $val; return $key =~ /^\d/ ? $arg : croak qq[unknown algorithm $arg]; } sub _algbyval { my $value = shift; return $algbyval{$value} || return $value; } } ######################################## 1; __END__ =head1 SYNOPSIS use Net::DNS; $rr = Net::DNS::RR->new('name IN CERT certtype keytag algorithm cert'); =head1 DESCRIPTION Class for DNS Certificate (CERT) resource records. =head1 METHODS The available methods are those inherited from the base class augmented by the type-specific methods defined in this package. Use of undocumented package features or direct access to internal data structures is discouraged and could result in program termination or other unpredictable behaviour. =head2 certtype $certtype = $rr->certtype; Returns the certtype code for the certificate (in numeric form). =head2 keytag $keytag = $rr->keytag; $rr->keytag( $keytag ); Returns the key tag for the public key in the certificate =head2 algorithm $algorithm = $rr->algorithm; Returns the algorithm used by the certificate (in numeric form). =head2 certificate =head2 certbin $certbin = $rr->certbin; $rr->certbin( $certbin ); Binary representation of the certificate. =head2 cert $cert = $rr->cert; $rr->cert( $cert ); Base64 representation of the certificate. =head1 COPYRIGHT Copyright (c)2002 VeriSign, Mike Schiraldi All rights reserved. Package template (c)2009,2012 O.M.Kolkman and R.W.Franks. =head1 LICENSE Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the original copyright notices appear in all copies and that both copyright notice and this permission notice appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. =head1 SEE ALSO L<perl>, L<Net::DNS>, L<Net::DNS::RR>, RFC4398 L<Algorithm Numbers|http://www.iana.org/assignments/dns-sec-alg-numbers> =cut