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.\" ========================================================================
.\"
.IX Title "Net::DNS::RR::TSIG 3"
.TH Net::DNS::RR::TSIG 3 "2006-09-18" "perl v5.8.8" "User Contributed Perl Documentation"
.SH "NAME"
Net::DNS::RR::TSIG \- DNS TSIG resource record
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\f(CW\*(C`use Net::DNS::RR\*(C'\fR;
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Class for \s-1DNS\s0 Transaction Signature (\s-1TSIG\s0) resource records.
.SH "METHODS"
.IX Header "METHODS"
.Sh "algorithm"
.IX Subsection "algorithm"
.Vb 2
\&    $rr->algorithm($algorithm_name);
\&    print "algorithm = ", $rr->algorithm, "\en";
.Ve
.PP
Gets or sets the domain name that specifies the name of the algorithm.
The only algorithm currently supported is \s-1HMAC\-MD5\s0.SIG\-ALG.REG.INT.
.Sh "time_signed"
.IX Subsection "time_signed"
.Vb 2
\&    $rr->time_signed(time);
\&    print "time signed = ", $rr->time_signed, "\en";
.Ve
.PP
Gets or sets the signing time as the number of seconds since 1 Jan 1970
00:00:00 \s-1UTC\s0.
.PP
The default signing time is the current time.
.Sh "fudge"
.IX Subsection "fudge"
.Vb 2
\&    $rr->fudge(60);
\&    print "fudge = ", $rr->fudge, "\en";
.Ve
.PP
Gets or sets the \*(L"fudge\*(R", i.e., the seconds of error permitted in the
signing time.
.PP
The default fudge is 300 seconds.
.Sh "mac_size"
.IX Subsection "mac_size"
.Vb 1
\&    print "MAC size = ", $rr->mac_size, "\en";
.Ve
.PP
Returns the number of octets in the message authentication code (\s-1MAC\s0).
The programmer must call a Net::DNS::Packet object's data method
before this will return anything meaningful.
.Sh "mac"
.IX Subsection "mac"
.Vb 1
\&    print "MAC = ", $rr->mac, "\en";
.Ve
.PP
Returns the message authentication code (\s-1MAC\s0) as a string of hex
characters.  The programmer must call a Net::DNS::Packet object's
data method before this will return anything meaningful.
.Sh "original_id"
.IX Subsection "original_id"
.Vb 2
\&    $rr->original_id(12345);
\&    print "original ID = ", $rr->original_id, "\en";
.Ve
.PP
Gets or sets the original message \s-1ID\s0.
.Sh "error"
.IX Subsection "error"
.Vb 1
\&    print "error = ", $rr->error, "\en";
.Ve
.PP
Returns the \s-1RCODE\s0 covering \s-1TSIG\s0 processing.  Common values are
\&\s-1NOERROR\s0, \s-1BADSIG\s0, \s-1BADKEY\s0, and \s-1BADTIME\s0.  See \s-1RFC\s0 2845 for details.
.Sh "other_len"
.IX Subsection "other_len"
.Vb 1
\&    print "other len = ", $rr->other_len, "\en";
.Ve
.PP
Returns the length of the Other Data.  Should be zero unless the
error is \s-1BADTIME\s0.
.Sh "other_data"
.IX Subsection "other_data"
.Vb 1
\&    print "other data = ", $rr->other_data, "\en";
.Ve
.PP
Returns the Other Data.  This field should be empty unless the
error is \s-1BADTIME\s0, in which case it will contain the server's
time as the number of seconds since 1 Jan 1970 00:00:00 \s-1UTC\s0.
.Sh "sig_data"
.IX Subsection "sig_data"
.Vb 1
\&     my $sigdata = $tsig->sig_data($packet);
.Ve
.PP
Returns the packet packed according to \s-1RFC2845\s0 in a form for signing. This
is only needed if you want to supply an external signing function, such as is 
needed for \s-1TSIG\-GSS\s0. 
.Sh "sign_func"
.IX Subsection "sign_func"
.Vb 2
\&     sub my_sign_fn($$) {
\&             my ($key, $data) = @_;
.Ve
.PP
.Vb 2
\&             return some_digest_algorithm($key, $data);
\&     }
.Ve
.PP
.Vb 1
\&     $tsig->sign_func(\e&my_sign_fn);
.Ve
.PP
This sets the signing function to be used for this \s-1TSIG\s0 record. 
.PP
The default signing function is \s-1HMAC\-MD5\s0.
.SH "BUGS"
.IX Header "BUGS"
This code is still under development.  Use with caution on production
systems.
.PP
The time_signed and other_data fields should be 48\-bit unsigned
integers (\s-1RFC\s0 2845, Sections 2.3 and 4.5.2).  The current implementation
ignores the upper 16 bits; this will cause problems for times later
than 19 Jan 2038 03:14:07 \s-1UTC\s0.
.PP
The only builtin algorithm currently supported is
\&\s-1HMAC\-MD5\s0.SIG\-ALG.REG.INT. You can use other algorithms by supplying an
appropriate sign_func.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2002 Michael Fuhr. 
.PP
Portions Copyright (c) 2002\-2004 Chris Reinhardt.
.PP
All rights reserved.  This program is free software; you may redistribute
it and/or modify it under the same terms as Perl itself.
.SH "ACKNOWLEDGMENT"
.IX Header "ACKNOWLEDGMENT"
Most of the code in the Net::DNS::RR::TSIG module was contributed
by Chris Turbeville. 
.PP
Support for external signing functions was added by Andrew Tridgell.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIperl\fR\|(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet,
Net::DNS::Header, Net::DNS::Question, Net::DNS::RR,
\&\s-1RFC\s0 2845
Creat By MiNi SheLL
Email: devilkiller@gmail.com