661 lines
23 KiB
Plaintext
661 lines
23 KiB
Plaintext
<!--
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- Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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-
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- This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this
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- file, You can obtain one at http://mozilla.org/MPL/2.0/.
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-
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- See the COPYRIGHT file distributed with this work for additional
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- information regarding copyright ownership.
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-->
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<!-- Converted by db4-upgrade version 1.0 -->
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<refentry xmlns:db="http://docbook.org/ns/docbook" version="5.0" xml:id="man.dnssec-keygen">
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<info>
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<date>2014-02-06</date>
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</info>
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<refentryinfo>
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<date>August 21, 2015</date>
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<corpname>ISC</corpname>
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<corpauthor>Internet Systems Consortium, Inc.</corpauthor>
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</refentryinfo>
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<refmeta>
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<refentrytitle><application>dnssec-keygen</application></refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo>BIND9</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname><application>dnssec-keygen</application></refname>
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<refpurpose>DNSSEC key generation tool</refpurpose>
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</refnamediv>
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<docinfo>
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<copyright>
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<year>2000</year>
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<year>2001</year>
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<year>2002</year>
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<year>2003</year>
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<year>2004</year>
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<year>2005</year>
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<year>2007</year>
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<year>2008</year>
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<year>2009</year>
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<year>2010</year>
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<year>2011</year>
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<year>2012</year>
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<year>2014</year>
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<year>2015</year>
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<year>2016</year>
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<year>2017</year>
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<year>2018</year>
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<year>2019</year>
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<year>2020</year>
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<holder>Internet Systems Consortium, Inc. ("ISC")</holder>
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</copyright>
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</docinfo>
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<refsynopsisdiv>
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<cmdsynopsis sepchar=" ">
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<command>dnssec-keygen</command>
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<arg choice="opt" rep="norepeat"><option>-3</option></arg>
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<arg choice="opt" rep="norepeat"><option>-A <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg rep="norepeat"><option>-a <replaceable class="parameter">algorithm</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-b <replaceable class="parameter">keysize</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-C</option></arg>
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<arg choice="opt" rep="norepeat"><option>-c <replaceable class="parameter">class</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-D <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-D sync <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-E <replaceable class="parameter">engine</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-f <replaceable class="parameter">flag</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-G</option></arg>
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<arg choice="opt" rep="norepeat"><option>-g <replaceable class="parameter">generator</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-h</option></arg>
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<arg choice="opt" rep="norepeat"><option>-I <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-i <replaceable class="parameter">interval</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-K <replaceable class="parameter">directory</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-k</option></arg>
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<arg choice="opt" rep="norepeat"><option>-L <replaceable class="parameter">ttl</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-n <replaceable class="parameter">nametype</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-P <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-P sync <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-p <replaceable class="parameter">protocol</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-q</option></arg>
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<arg choice="opt" rep="norepeat"><option>-R <replaceable class="parameter">date/offset</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-r <replaceable class="parameter">randomdev</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-S <replaceable class="parameter">key</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-s <replaceable class="parameter">strength</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-t <replaceable class="parameter">type</replaceable></option></arg>
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<arg choice="opt" rep="norepeat"><option>-V</option></arg>
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<arg choice="opt" rep="norepeat"><option>-v <replaceable class="parameter">level</replaceable></option></arg>
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<arg choice="req" rep="norepeat">name</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection><info><title>DESCRIPTION</title></info>
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<para><command>dnssec-keygen</command>
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generates keys for DNSSEC (Secure DNS), as defined in RFC 2535
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and RFC 4034. It can also generate keys for use with
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TSIG (Transaction Signatures) as defined in RFC 2845, or TKEY
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(Transaction Key) as defined in RFC 2930.
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</para>
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<para>
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The <option>name</option> of the key is specified on the command
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line. For DNSSEC keys, this must match the name of the zone for
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which the key is being generated.
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</para>
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</refsection>
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<refsection><info><title>OPTIONS</title></info>
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<variablelist>
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<varlistentry>
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<term>-3</term>
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<listitem>
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<para>
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Use an NSEC3-capable algorithm to generate a DNSSEC key.
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If this option is used with an algorithm that has both
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NSEC and NSEC3 versions, then the NSEC3 version will be
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used; for example, <command>dnssec-keygen -3a RSASHA1</command>
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specifies the NSEC3RSASHA1 algorithm.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-a <replaceable class="parameter">algorithm</replaceable></term>
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<listitem>
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<para>
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Selects the cryptographic algorithm. For DNSSEC keys, the value
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of <option>algorithm</option> must be one of RSAMD5, RSASHA1,
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DSA, NSEC3RSASHA1, NSEC3DSA, RSASHA256, RSASHA512, ECCGOST,
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ECDSAP256SHA256, ECDSAP384SHA384, ED25519 or ED448.
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For TSIG/TKEY, the value must
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be DH (Diffie Hellman), HMAC-MD5, HMAC-SHA1, HMAC-SHA224,
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HMAC-SHA256, HMAC-SHA384, or HMAC-SHA512. These values are
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case insensitive.
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</para>
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<para>
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If no algorithm is specified, then RSASHA1 will be used by
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default, unless the <option>-3</option> option is specified,
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in which case NSEC3RSASHA1 will be used instead. (If
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<option>-3</option> is used and an algorithm is specified,
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that algorithm will be checked for compatibility with NSEC3.)
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</para>
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<para>
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Note 1: that for DNSSEC, RSASHA1 is a mandatory to implement
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algorithm, and DSA is recommended. For TSIG, HMAC-MD5 is
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mandatory.
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</para>
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<para>
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Note 2: DH, HMAC-MD5, and HMAC-SHA1 through HMAC-SHA512
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automatically set the -T KEY option.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-b <replaceable class="parameter">keysize</replaceable></term>
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<listitem>
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<para>
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Specifies the number of bits in the key. The choice of key
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size depends on the algorithm used. RSA keys must be
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between 512 and 2048 bits. Diffie Hellman keys must be between
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128 and 4096 bits. DSA keys must be between 512 and 1024
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bits and an exact multiple of 64. HMAC keys must be
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between 1 and 512 bits. Elliptic curve algorithms don't need
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this parameter.
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</para>
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<para>
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The key size does not need to be specified if using a default
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algorithm. The default key size is 1024 bits for zone signing
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keys (ZSKs) and 2048 bits for key signing keys (KSKs,
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generated with <option>-f KSK</option>). However, if an
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algorithm is explicitly specified with the <option>-a</option>,
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then there is no default key size, and the <option>-b</option>
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must be used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-C</term>
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<listitem>
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<para>
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Compatibility mode: generates an old-style key, without any
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timing metadata. By default, <command>dnssec-keygen</command>
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will include the key's creation date in the metadata stored with
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the private key, and other dates may be set there as well
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(publication date, activation date, etc). Keys that include this
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data may be incompatible with older versions of BIND; the
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<option>-C</option> option suppresses them.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-c <replaceable class="parameter">class</replaceable></term>
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<listitem>
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<para>
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Indicates that the DNS record containing the key should have
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the specified class. If not specified, class IN is used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-E <replaceable class="parameter">engine</replaceable></term>
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<listitem>
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<para>
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Specifies the cryptographic hardware to use, when applicable.
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</para>
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<para>
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When BIND is built with OpenSSL PKCS#11 support, this defaults
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to the string "pkcs11", which identifies an OpenSSL engine
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that can drive a cryptographic accelerator or hardware service
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module. When BIND is built with native PKCS#11 cryptography
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(--enable-native-pkcs11), it defaults to the path of the PKCS#11
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provider library specified via "--with-pkcs11".
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-f <replaceable class="parameter">flag</replaceable></term>
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<listitem>
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<para>
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Set the specified flag in the flag field of the KEY/DNSKEY record.
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The only recognized flags are KSK (Key Signing Key) and REVOKE.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-G</term>
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<listitem>
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<para>
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Generate a key, but do not publish it or sign with it. This
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option is incompatible with -P and -A.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-g <replaceable class="parameter">generator</replaceable></term>
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<listitem>
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<para>
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If generating a Diffie Hellman key, use this generator.
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Allowed values are 2 and 5. If no generator
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is specified, a known prime from RFC 2539 will be used
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if possible; otherwise the default is 2.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-h</term>
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<listitem>
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<para>
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Prints a short summary of the options and arguments to
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<command>dnssec-keygen</command>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-K <replaceable class="parameter">directory</replaceable></term>
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<listitem>
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<para>
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Sets the directory in which the key files are to be written.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-k</term>
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<listitem>
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<para>
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Deprecated in favor of -T KEY.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-L <replaceable class="parameter">ttl</replaceable></term>
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<listitem>
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<para>
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Sets the default TTL to use for this key when it is converted
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into a DNSKEY RR. If the key is imported into a zone,
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this is the TTL that will be used for it, unless there was
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already a DNSKEY RRset in place, in which case the existing TTL
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would take precedence. If this value is not set and there
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is no existing DNSKEY RRset, the TTL will default to the
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SOA TTL. Setting the default TTL to <literal>0</literal>
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or <literal>none</literal> is the same as leaving it unset.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-n <replaceable class="parameter">nametype</replaceable></term>
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<listitem>
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<para>
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Specifies the owner type of the key. The value of
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<option>nametype</option> must either be ZONE (for a DNSSEC
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zone key (KEY/DNSKEY)), HOST or ENTITY (for a key associated
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with a host (KEY)), USER (for a key associated with a
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user(KEY)) or OTHER (DNSKEY). These values are case
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insensitive. Defaults to ZONE for DNSKEY generation.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-p <replaceable class="parameter">protocol</replaceable></term>
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<listitem>
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<para>
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Sets the protocol value for the generated key, for use
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with <option>-T KEY</option>. The protocol is a number between 0
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and 255. The default is 3 (DNSSEC). Other possible values for
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this argument are listed in RFC 2535 and its successors.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-q</term>
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<listitem>
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<para>
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Quiet mode: Suppresses unnecessary output, including
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progress indication. Without this option, when
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<command>dnssec-keygen</command> is run interactively
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to generate an RSA or DSA key pair, it will print a string
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of symbols to <filename>stderr</filename> indicating the
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progress of the key generation. A '.' indicates that a
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random number has been found which passed an initial
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sieve test; '+' means a number has passed a single
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round of the Miller-Rabin primality test; a space
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means that the number has passed all the tests and is
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a satisfactory key.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-r <replaceable class="parameter">randomdev</replaceable></term>
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<listitem>
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<para>
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Specifies the source of randomness. If the operating
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system does not provide a <filename>/dev/random</filename>
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or equivalent device, the default source of randomness
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is keyboard input. <filename>randomdev</filename>
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specifies
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the name of a character device or file containing random
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data to be used instead of the default. The special value
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<filename>keyboard</filename> indicates that keyboard
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input should be used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-S <replaceable class="parameter">key</replaceable></term>
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<listitem>
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<para>
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Create a new key which is an explicit successor to an
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existing key. The name, algorithm, size, and type of the
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key will be set to match the existing key. The activation
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date of the new key will be set to the inactivation date of
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the existing one. The publication date will be set to the
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activation date minus the prepublication interval, which
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defaults to 30 days.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-s <replaceable class="parameter">strength</replaceable></term>
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<listitem>
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<para>
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Specifies the strength value of the key. The strength is
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a number between 0 and 15, and currently has no defined
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purpose in DNSSEC.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-T <replaceable class="parameter">rrtype</replaceable></term>
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<listitem>
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<para>
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Specifies the resource record type to use for the key.
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<option>rrtype</option> must be either DNSKEY or KEY. The
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default is DNSKEY when using a DNSSEC algorithm, but it can be
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overridden to KEY for use with SIG(0).
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<para>
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</para>
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Using any TSIG algorithm (HMAC-* or DH) forces this option
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to KEY.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-t <replaceable class="parameter">type</replaceable></term>
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<listitem>
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<para>
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Indicates the use of the key, for use with <option>-T
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KEY</option>. <option>type</option> must be one of AUTHCONF,
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NOAUTHCONF, NOAUTH, or NOCONF. The default is AUTHCONF. AUTH
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refers to the ability to authenticate data, and CONF the ability
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to encrypt data.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-V</term>
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<listitem>
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<para>
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Prints version information.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-v <replaceable class="parameter">level</replaceable></term>
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<listitem>
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<para>
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Sets the debugging level.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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|
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<refsection><info><title>TIMING OPTIONS</title></info>
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|
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<para>
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Dates can be expressed in the format YYYYMMDD or YYYYMMDDHHMMSS.
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If the argument begins with a '+' or '-', it is interpreted as
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an offset from the present time. For convenience, if such an offset
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is followed by one of the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi',
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then the offset is computed in years (defined as 365 24-hour days,
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|
ignoring leap years), months (defined as 30 24-hour days), weeks,
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|
days, hours, or minutes, respectively. Without a suffix, the offset
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|
is computed in seconds. To explicitly prevent a date from being
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set, use 'none' or 'never'.
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</para>
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|
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<variablelist>
|
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<varlistentry>
|
|
<term>-P <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which a key is to be published to the zone.
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|
After that date, the key will be included in the zone but will
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not be used to sign it. If not set, and if the -G option has
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not been used, the default is "now".
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</para>
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</listitem>
|
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</varlistentry>
|
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|
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<varlistentry>
|
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<term>-P sync <replaceable class="parameter">date/offset</replaceable></term>
|
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<listitem>
|
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<para>
|
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Sets the date on which CDS and CDNSKEY records that match this
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key are to be published to the zone.
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</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-A <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which the key is to be activated. After that
|
|
date, the key will be included in the zone and used to sign
|
|
it. If not set, and if the -G option has not been used, the
|
|
default is "now". If set, if and -P is not set, then
|
|
the publication date will be set to the activation date
|
|
minus the prepublication interval.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-R <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which the key is to be revoked. After that
|
|
date, the key will be flagged as revoked. It will be included
|
|
in the zone and will be used to sign it.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-I <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which the key is to be retired. After that
|
|
date, the key will still be included in the zone, but it
|
|
will not be used to sign it.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-D <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which the key is to be deleted. After that
|
|
date, the key will no longer be included in the zone. (It
|
|
may remain in the key repository, however.)
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-D sync <replaceable class="parameter">date/offset</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the date on which the CDS and CDNSKEY records that match this
|
|
key are to be deleted.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term>-i <replaceable class="parameter">interval</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Sets the prepublication interval for a key. If set, then
|
|
the publication and activation dates must be separated by at least
|
|
this much time. If the activation date is specified but the
|
|
publication date isn't, then the publication date will default
|
|
to this much time before the activation date; conversely, if
|
|
the publication date is specified but activation date isn't,
|
|
then activation will be set to this much time after publication.
|
|
</para>
|
|
<para>
|
|
If the key is being created as an explicit successor to another
|
|
key, then the default prepublication interval is 30 days;
|
|
otherwise it is zero.
|
|
</para>
|
|
<para>
|
|
As with date offsets, if the argument is followed by one of
|
|
the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi', then the
|
|
interval is measured in years, months, weeks, days, hours,
|
|
or minutes, respectively. Without a suffix, the interval is
|
|
measured in seconds.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</refsection>
|
|
|
|
|
|
<refsection><info><title>GENERATED KEYS</title></info>
|
|
|
|
<para>
|
|
When <command>dnssec-keygen</command> completes
|
|
successfully,
|
|
it prints a string of the form <filename>Knnnn.+aaa+iiiii</filename>
|
|
to the standard output. This is an identification string for
|
|
the key it has generated.
|
|
</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para><filename>nnnn</filename> is the key name.
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para><filename>aaa</filename> is the numeric representation
|
|
of the
|
|
algorithm.
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para><filename>iiiii</filename> is the key identifier (or
|
|
footprint).
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
<para><command>dnssec-keygen</command>
|
|
creates two files, with names based
|
|
on the printed string. <filename>Knnnn.+aaa+iiiii.key</filename>
|
|
contains the public key, and
|
|
<filename>Knnnn.+aaa+iiiii.private</filename> contains the
|
|
private
|
|
key.
|
|
</para>
|
|
<para>
|
|
The <filename>.key</filename> file contains a DNS KEY record
|
|
that
|
|
can be inserted into a zone file (directly or with a $INCLUDE
|
|
statement).
|
|
</para>
|
|
<para>
|
|
The <filename>.private</filename> file contains
|
|
algorithm-specific
|
|
fields. For obvious security reasons, this file does not have
|
|
general read permission.
|
|
</para>
|
|
<para>
|
|
Both <filename>.key</filename> and <filename>.private</filename>
|
|
files are generated for symmetric cryptography algorithms such as
|
|
HMAC-MD5, even though the public and private key are equivalent.
|
|
</para>
|
|
</refsection>
|
|
|
|
<refsection><info><title>EXAMPLE</title></info>
|
|
|
|
<para>
|
|
To generate a 768-bit DSA key for the domain
|
|
<userinput>example.com</userinput>, the following command would be
|
|
issued:
|
|
</para>
|
|
<para><userinput>dnssec-keygen -a DSA -b 768 -n ZONE example.com</userinput>
|
|
</para>
|
|
<para>
|
|
The command would print a string of the form:
|
|
</para>
|
|
<para><userinput>Kexample.com.+003+26160</userinput>
|
|
</para>
|
|
<para>
|
|
In this example, <command>dnssec-keygen</command> creates
|
|
the files <filename>Kexample.com.+003+26160.key</filename>
|
|
and
|
|
<filename>Kexample.com.+003+26160.private</filename>.
|
|
</para>
|
|
<para>
|
|
To generate a matching key-signing key, issue the command:
|
|
</para>
|
|
<para>
|
|
<userinput>dnssec-keygen -a DSA -b 768 -n ZONE -f KSK example.com</userinput>
|
|
</para>
|
|
</refsection>
|
|
|
|
<refsection><info><title>SEE ALSO</title></info>
|
|
|
|
<para><citerefentry>
|
|
<refentrytitle>dnssec-signzone</refentrytitle><manvolnum>8</manvolnum>
|
|
</citerefentry>,
|
|
<citetitle>BIND 9 Administrator Reference Manual</citetitle>,
|
|
<citetitle>RFC 2539</citetitle>,
|
|
<citetitle>RFC 2845</citetitle>,
|
|
<citetitle>RFC 4034</citetitle>.
|
|
</para>
|
|
</refsection>
|
|
|
|
</refentry>
|