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.\" ========================================================================
.\"
.IX Title "Net::DNS::RR::DS 3"
.TH Net::DNS::RR::DS 3 "2016-05-27" "perl v5.16.3" "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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.nh
.SH "NAME"
Net::DNS::RR::DS \- DNS DS resource record
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    use Net::DNS;
\&    $rr = new Net::DNS::RR(\*(Aqname DS keytag algorithm digtype digest\*(Aq);
\&
\&    use Net::DNS::SEC;
\&    $ds = create Net::DNS::RR::DS(
\&        $dnskeyrr,
\&        digtype => \*(AqSHA256\*(Aq,
\&        ttl     => 3600
\&        );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Class for \s-1DNS\s0 Delegation Signer (\s-1DS\s0) resource record.
.SH "METHODS"
.IX Header "METHODS"
The available methods are those inherited from the base class augmented
by the type-specific methods defined in this package.
.PP
Use of undocumented package features or direct access to internal data
structures is discouraged and could result in program termination or
other unpredictable behaviour.
.SS "keytag"
.IX Subsection "keytag"
.Vb 2
\&    $keytag = $rr\->keytag;
\&    $rr\->keytag( $keytag );
.Ve
.PP
The 16\-bit numerical key tag of the key. (\s-1RFC2535 4.1.6\s0)
.SS "algorithm"
.IX Subsection "algorithm"
.Vb 2
\&    $algorithm = $rr\->algorithm;
\&    $rr\->algorithm( $algorithm );
.Ve
.PP
Decimal representation of the 8\-bit algorithm field.
.PP
\&\fIalgorithm()\fR may also be invoked as a class method or simple function
to perform mnemonic and numeric code translation.
.SS "digtype"
.IX Subsection "digtype"
.Vb 2
\&    $digtype = $rr\->digtype;
\&    $rr\->digtype( $digtype );
.Ve
.PP
Decimal representation of the 8\-bit digest type field.
.PP
\&\fIdigtype()\fR may also be invoked as a class method or simple function
to perform mnemonic and numeric code translation.
.SS "digest"
.IX Subsection "digest"
.Vb 2
\&    $digest = $rr\->digest;
\&    $rr\->digest( $digest );
.Ve
.PP
Hexadecimal representation of the digest over the label and key.
.SS "digestbin"
.IX Subsection "digestbin"
.Vb 2
\&    $digestbin = $rr\->digestbin;
\&    $rr\->digestbin( $digestbin );
.Ve
.PP
Binary representation of the digest over the label and key.
.SS "babble"
.IX Subsection "babble"
.Vb 1
\&    print $rr\->babble;
.Ve
.PP
The \fIbabble()\fR method returns the 'BubbleBabble' representation of the
digest if the Digest::BubbleBabble package is available, otherwise
an empty string is returned.
.PP
BubbleBabble represents a message digest as a string of plausible
words, to make the digest easier to verify.  The \*(L"words\*(R" are not
necessarily real words, but they look more like words than a string
of hex characters.
.PP
The 'BubbleBabble' string is appended as a comment to the \s-1RDATA\s0 when
the string method is called.
.SS "create"
.IX Subsection "create"
.Vb 1
\&    use Net::DNS::SEC;
\&
\&    $dsrr = create Net::DNS::RR::DS($keyrr, digtype => \*(AqSHA\-256\*(Aq );
\&    $keyrr\->print;
\&    $dsrr\->print;
.Ve
.PP
This constructor takes a key object as argument and will return the
corresponding \s-1DS RR\s0 object.
.PP
The digest type defaults to \s-1SHA\-1.\s0
.SS "verify"
.IX Subsection "verify"
.Vb 1
\&    $verify = $dsrr\->verify($keyrr);
.Ve
.PP
The boolean verify method will return true if the hash over the key
\&\s-1RR\s0 provided as the argument conforms to the data in the \s-1DS\s0 itself
i.e. the \s-1DS\s0 points to the \s-1DNSKEY\s0 from the argument.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c)2001\-2005 \s-1RIPE NCC. \s0 Author Olaf M. Kolkman
.PP
Portions Copyright (c)2013 Dick Franks.
.PP
All rights reserved.
.PP
Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
.SH "LICENSE"
.IX Header "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 above copyright notice appear in all copies and that both that
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.
.PP
\&\s-1THE SOFTWARE IS PROVIDED \*(L"AS IS\*(R", 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.\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
perl, Net::DNS, Net::DNS::RR, \s-1RFC4034, RFC3658\s0
.PP
Algorithm Numbers <http://www.iana.org/assignments/dns-sec-alg-numbers>,
Digest Types <http://www.iana.org/assignments/ds-rr-types>