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.\" Copyright (C) 2008-2011 Internet Systems Consortium, Inc. ("ISC")
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.\" 
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.\" Permission to use, copy, modify, and/or distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" 
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
.\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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.\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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.\" 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.
.\"
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.\" $Id$
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.\"
.hy 0
.ad l
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.\"     Title: dnssec\-dsfromkey
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.71.1 <http://docbook.sf.net/>
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.\"      Date: August 26, 2009
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.\"    Manual: BIND9
.\"    Source: BIND9
.\"
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.TH "DNSSEC\-DSFROMKEY" "8" "August 26, 2009" "BIND9" "BIND9"
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.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.SH "NAME"
dnssec\-dsfromkey \- DNSSEC DS RR generation tool
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.SH "SYNOPSIS"
.HP 17
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\fBdnssec\-dsfromkey\fR [\fB\-v\ \fR\fB\fIlevel\fR\fR] [\fB\-1\fR] [\fB\-2\fR] [\fB\-a\ \fR\fB\fIalg\fR\fR] [\fB\-l\ \fR\fB\fIdomain\fR\fR] [\fB\-T\ \fR\fB\fITTL\fR\fR] {keyfile}
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.HP 17
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\fBdnssec\-dsfromkey\fR {\-s} [\fB\-1\fR] [\fB\-2\fR] [\fB\-a\ \fR\fB\fIalg\fR\fR] [\fB\-K\ \fR\fB\fIdirectory\fR\fR] [\fB\-l\ \fR\fB\fIdomain\fR\fR] [\fB\-s\fR] [\fB\-c\ \fR\fB\fIclass\fR\fR] [\fB\-T\ \fR\fB\fITTL\fR\fR] [\fB\-f\ \fR\fB\fIfile\fR\fR] [\fB\-A\fR] [\fB\-v\ \fR\fB\fIlevel\fR\fR] {dnsname}
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.SH "DESCRIPTION"
.PP
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\fBdnssec\-dsfromkey\fR
outputs the Delegation Signer (DS) resource record (RR), as defined in RFC 3658 and RFC 4509, for the given key(s).
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.SH "OPTIONS"
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.PP
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\-1
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.RS 4
Use SHA\-1 as the digest algorithm (the default is to use both SHA\-1 and SHA\-256).
.RE
.PP
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\-2
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.RS 4
Use SHA\-256 as the digest algorithm.
.RE
.PP
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\-a \fIalgorithm\fR
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.RS 4
Select the digest algorithm. The value of
\fBalgorithm\fR
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must be one of SHA\-1 (SHA1), SHA\-256 (SHA256), GOST or SHA\-384 (SHA384). These values are case insensitive.
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.RE
.PP
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\-T \fITTL\fR
.RS 4
Specifies the TTL of the DS records.
.RE
.PP
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\-K \fIdirectory\fR
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.RS 4
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Look for key files (or, in keyset mode,
\fIkeyset\-\fR
files) in
\fBdirectory\fR.
.RE
.PP
\-f \fIfile\fR
.RS 4
Zone file mode: in place of the keyfile name, the argument is the DNS domain name of a zone master file, which can be read from
\fBfile\fR. If the zone name is the same as
\fBfile\fR, then it may be omitted.
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.sp
If
\fBfile\fR
is set to
"\-", then the zone data is read from the standard input. This makes it possible to use the output of the
\fBdig\fR
command as input, as in:
.sp
\fBdig dnskey example.com | dnssec\-dsfromkey \-f \- example.com\fR
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.RE
.PP
\-A
.RS 4
Include ZSK's when generating DS records. Without this option, only keys which have the KSK flag set will be converted to DS records and printed. Useful only in zone file mode.
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.RE
.PP
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\-l \fIdomain\fR
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.RS 4
Generate a DLV set instead of a DS set. The specified
\fBdomain\fR
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is appended to the name for each record in the set. The DNSSEC Lookaside Validation (DLV) RR is described in RFC 4431.
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.RE
.PP
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\-s
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.RS 4
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Keyset mode: in place of the keyfile name, the argument is the DNS domain name of a keyset file.
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.RE
.PP
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\-c \fIclass\fR
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.RS 4
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Specifies the DNS class (default is IN). Useful only in keyset or zone file mode.
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.RE
.PP
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\-v \fIlevel\fR
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.RS 4
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Sets the debugging level.
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.RE
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.SH "EXAMPLE"
.PP
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To build the SHA\-256 DS RR from the
\fBKexample.com.+003+26160\fR
keyfile name, the following command would be issued:
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.PP
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\fBdnssec\-dsfromkey \-2 Kexample.com.+003+26160\fR
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.PP
The command would print something like:
.PP
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\fBexample.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0 C5EA0B94\fR
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.SH "FILES"
.PP
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The keyfile can be designed by the key identification
\fIKnnnn.+aaa+iiiii\fR
or the full file name
\fIKnnnn.+aaa+iiiii.key\fR
as generated by
dnssec\-keygen(8).
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.PP
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The keyset file name is built from the
\fBdirectory\fR, the string
\fIkeyset\-\fR
and the
\fBdnsname\fR.
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.SH "CAVEAT"
.PP
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A keyfile error can give a "file not found" even if the file exists.
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.SH "SEE ALSO"
.PP
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\fBdnssec\-keygen\fR(8),
\fBdnssec\-signzone\fR(8),
BIND 9 Administrator Reference Manual,
RFC 3658,
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RFC 4431.
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RFC 4509.
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.SH "AUTHOR"
.PP
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Internet Systems Consortium
.SH "COPYRIGHT"
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Copyright \(co 2008\-2011 Internet Systems Consortium, Inc. ("ISC")
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.br