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42<div class="refentry" lang="en">
43<a name="man.dnssec-dsfromkey"></a><div class="titlepage"></div>
44<div class="refnamediv">
45<h2>Name</h2>
46<p><span class="application">dnssec-dsfromkey</span> &#8212; DNSSEC DS RR generation tool</p>
47</div>
48<div class="refsynopsisdiv">
49<h2>Synopsis</h2>
50<div class="cmdsynopsis"><p><code class="command">dnssec-dsfromkey</code>  [<code class="option">-v <em class="replaceable"><code>level</code></em></code>] [<code class="option">-1</code>] [<code class="option">-2</code>] [<code class="option">-a <em class="replaceable"><code>alg</code></em></code>] [<code class="option">-l <em class="replaceable"><code>domain</code></em></code>] [<code class="option">-T <em class="replaceable"><code>TTL</code></em></code>] {keyfile}</p></div>
51<div class="cmdsynopsis"><p><code class="command">dnssec-dsfromkey</code>  {-s} [<code class="option">-1</code>] [<code class="option">-2</code>] [<code class="option">-a <em class="replaceable"><code>alg</code></em></code>] [<code class="option">-K <em class="replaceable"><code>directory</code></em></code>] [<code class="option">-l <em class="replaceable"><code>domain</code></em></code>] [<code class="option">-s</code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-T <em class="replaceable"><code>TTL</code></em></code>] [<code class="option">-f <em class="replaceable"><code>file</code></em></code>] [<code class="option">-A</code>] [<code class="option">-v <em class="replaceable"><code>level</code></em></code>] {dnsname}</p></div>
52<div class="cmdsynopsis"><p><code class="command">dnssec-dsfromkey</code>  [<code class="option">-h</code>] [<code class="option">-V</code>]</p></div>
53</div>
54<div class="refsect1" lang="en">
55<a name="id2619397"></a><h2>DESCRIPTION</h2>
56<p><span><strong class="command">dnssec-dsfromkey</strong></span>
57      outputs the Delegation Signer (DS) resource record (RR), as defined in
58      RFC 3658 and RFC 4509, for the given key(s).
59    </p>
60</div>
61<div class="refsect1" lang="en">
62<a name="id2619411"></a><h2>OPTIONS</h2>
63<div class="variablelist"><dl>
64<dt><span class="term">-1</span></dt>
65<dd><p>
66            Use SHA-1 as the digest algorithm (the default is to use
67            both SHA-1 and SHA-256).
68          </p></dd>
69<dt><span class="term">-2</span></dt>
70<dd><p>
71            Use SHA-256 as the digest algorithm.
72          </p></dd>
73<dt><span class="term">-a <em class="replaceable"><code>algorithm</code></em></span></dt>
74<dd><p>
75            Select the digest algorithm. The value of
76            <code class="option">algorithm</code> must be one of SHA-1 (SHA1),
77            SHA-256 (SHA256), GOST or SHA-384 (SHA384).
78            These values are case insensitive.
79          </p></dd>
80<dt><span class="term">-T <em class="replaceable"><code>TTL</code></em></span></dt>
81<dd><p>
82            Specifies the TTL of the DS records.
83          </p></dd>
84<dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt>
85<dd><p>
86            Look for key files (or, in keyset mode,
87            <code class="filename">keyset-</code> files) in
88            <code class="option">directory</code>.
89          </p></dd>
90<dt><span class="term">-f <em class="replaceable"><code>file</code></em></span></dt>
91<dd>
92<p>
93            Zone file mode: in place of the keyfile name, the argument is
94            the DNS domain name of a zone master file, which can be read
95            from <code class="option">file</code>.  If the zone name is the same as
96            <code class="option">file</code>, then it may be omitted.
97          </p>
98<p>
99            If <code class="option">file</code> is set to <code class="literal">"-"</code>, then
100            the zone data is read from the standard input.  This makes it
101            possible to use the output of the <span><strong class="command">dig</strong></span>
102            command as input, as in:
103          </p>
104<p>
105            <strong class="userinput"><code>dig dnskey example.com | dnssec-dsfromkey -f - example.com</code></strong>
106          </p>
107</dd>
108<dt><span class="term">-A</span></dt>
109<dd><p>
110            Include ZSK's when generating DS records.  Without this option,
111            only keys which have the KSK flag set will be converted to DS
112            records and printed.  Useful only in zone file mode.
113          </p></dd>
114<dt><span class="term">-l <em class="replaceable"><code>domain</code></em></span></dt>
115<dd><p>
116            Generate a DLV set instead of a DS set.  The specified
117            <code class="option">domain</code> is appended to the name for each
118            record in the set.
119            The DNSSEC Lookaside Validation (DLV) RR is described
120            in RFC 4431.
121          </p></dd>
122<dt><span class="term">-s</span></dt>
123<dd><p>
124            Keyset mode: in place of the keyfile name, the argument is
125            the DNS domain name of a keyset file.
126          </p></dd>
127<dt><span class="term">-c <em class="replaceable"><code>class</code></em></span></dt>
128<dd><p>
129            Specifies the DNS class (default is IN).  Useful only
130            in keyset or zone file mode.
131          </p></dd>
132<dt><span class="term">-v <em class="replaceable"><code>level</code></em></span></dt>
133<dd><p>
134            Sets the debugging level.
135          </p></dd>
136<dt><span class="term">-h</span></dt>
137<dd><p>
138            Prints usage information.
139          </p></dd>
140<dt><span class="term">-V</span></dt>
141<dd><p>
142            Prints version information.
143          </p></dd>
144</dl></div>
145</div>
146<div class="refsect1" lang="en">
147<a name="id2619741"></a><h2>EXAMPLE</h2>
148<p>
149      To build the SHA-256 DS RR from the
150      <strong class="userinput"><code>Kexample.com.+003+26160</code></strong>
151      keyfile name, the following command would be issued:
152    </p>
153<p><strong class="userinput"><code>dnssec-dsfromkey -2 Kexample.com.+003+26160</code></strong>
154    </p>
155<p>
156      The command would print something like:
157    </p>
158<p><strong class="userinput"><code>example.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0 C5EA0B94</code></strong>
159    </p>
160</div>
161<div class="refsect1" lang="en">
162<a name="id2619778"></a><h2>FILES</h2>
163<p>
164      The keyfile can be designed by the key identification
165      <code class="filename">Knnnn.+aaa+iiiii</code> or the full file name
166      <code class="filename">Knnnn.+aaa+iiiii.key</code> as generated by
167      <span class="refentrytitle">dnssec-keygen</span>(8).
168    </p>
169<p>
170      The keyset file name is built from the <code class="option">directory</code>,
171      the string <code class="filename">keyset-</code> and the
172      <code class="option">dnsname</code>.
173    </p>
174</div>
175<div class="refsect1" lang="en">
176<a name="id2620912"></a><h2>CAVEAT</h2>
177<p>
178      A keyfile error can give a "file not found" even if the file exists.
179    </p>
180</div>
181<div class="refsect1" lang="en">
182<a name="id2620921"></a><h2>SEE ALSO</h2>
183<p><span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
184      <span class="citerefentry"><span class="refentrytitle">dnssec-signzone</span>(8)</span>,
185      <em class="citetitle">BIND 9 Administrator Reference Manual</em>,
186      <em class="citetitle">RFC 3658</em>,
187      <em class="citetitle">RFC 4431</em>.
188      <em class="citetitle">RFC 4509</em>.
189    </p>
190</div>
191<div class="refsect1" lang="en">
192<a name="id2620961"></a><h2>AUTHOR</h2>
193<p><span class="corpauthor">Internet Systems Consortium</span>
194    </p>
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