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<div class="refentry" lang="en">
<a name="man.dnssec-dsfromkey"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p><span class="application">dnssec-dsfromkey</span> &#8212; DNSSEC DS RR generation tool</p>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<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>] {keyfile}</p></div>
<div class="cmdsynopsis"><p><code class="command">dnssec-dsfromkey</code> {-s} [<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">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-d <em class="replaceable"><code>dir</code></em></code>] {dnsname}</p></div>
</div>
<div class="refsect1" lang="en">
<a name="id2602709"></a><h2>DESCRIPTION</h2>
<p><span><strong class="command">dnssec-dsfromkey</strong></span>
outputs the Delegation Signer (DS) resource record RR, as defined in
RFC 3658 and RFC 4509, for the given key(s).
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2602723"></a><h2>OPTIONS</h2>
<div class="variablelist"><dl>
<dt><span class="term">-1</span></dt>
<dd><p>
Use SHA-1 as the digest algorithm (the default is to use
both SHA-1 and SHA-256).
</p></dd>
<dt><span class="term">-2</span></dt>
<dd><p>
Use SHA-256 as the digest algorithm.
</p></dd>
<dt><span class="term">-a <em class="replaceable"><code>algorithm</code></em></span></dt>
<dd><p>
Select the digest algorithm. The value of
<code class="option">algorithm</code> must be one of SHA-1 (SHA1) or
SHA-256 (SHA256). These values are case insensitive.
</p></dd>
<dt><span class="term">-v <em class="replaceable"><code>level</code></em></span></dt>
<dd><p>
Sets the debugging level.
</p></dd>
<dt><span class="term">-s</span></dt>
<dd><p>
Keyset mode: in place of the keyfile name, the argument is
the DNS domain name of a keyset file. Following options make sense
only in this mode.
</p></dd>
<dt><span class="term">-c <em class="replaceable"><code>class</code></em></span></dt>
<dd><p>
Specifies the DNS class (default is IN), useful only
in the keyset mode.
</p></dd>
<dt><span class="term">-d <em class="replaceable"><code>directory</code></em></span></dt>
<dd><p>
Look for <code class="filename">keyset</code> files in
<code class="option">directory</code> as the directory, ignored when
not in the keyset mode.
</p></dd>
</dl></div>
</div>
<div class="refsect1" lang="en">
<a name="id2602989"></a><h2>EXAMPLE</h2>
<p>
To build the SHA-256 DS RR from the
<strong class="userinput"><code>Kexample.com.+003+26160</code></strong>
keyfile name, the following command would be issued:
</p>
<p><strong class="userinput"><code>dnssec-dsfromkey -2 Kexample.com.+003+26160</code></strong>
</p>
<p>
The command would print something like:
</p>
<p><strong class="userinput"><code>example.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0 C5EA0B94</code></strong>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2603026"></a><h2>FILES</h2>
<p>
The keyfile can be designed by the key identification
<code class="filename">Knnnn.+aaa+iiiii</code> or the full file name
<code class="filename">Knnnn.+aaa+iiiii.key</code> as generate by
<span class="refentrytitle">dnssec-keygen</span>(8).
</p>
<p>
The keyset file name is built from the <code class="option">directory</code>,
the string <code class="filename">keyset-</code> and the
<code class="option">dnsname</code>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2603067"></a><h2>CAVEAT</h2>
<p>
A keyfile error can give a "file not found" even if the file exists.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2603418"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
<span class="citerefentry"><span class="refentrytitle">dnssec-signzone</span>(8)</span>,
<em class="citetitle">BIND 9 Administrator Reference Manual</em>,
<em class="citetitle">RFC 3658</em>,
<em class="citetitle">RFC 4509</em>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2603454"></a><h2>AUTHOR</h2>
<p><span class="corpauthor">Internet Systems Consortium</span>
</p>
</div>
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