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+<html lang="en">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>dnssec-dsfromkey</title>
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry">
+<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>]
+ [<code class="option">-C</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>
+ <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>
+ <div class="cmdsynopsis"><p>
+ <code class="command">dnssec-dsfromkey</code>
+ [<code class="option">-h</code>]
+ [<code class="option">-V</code>]
+ </p></div>
+ </div>
+
+ <div class="refsection">
+<a name="id-1.7"></a><h2>DESCRIPTION</h2>
+
+ <p><span class="command"><strong>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="refsection">
+<a name="id-1.8"></a><h2>OPTIONS</h2>
+
+
+ <div class="variablelist"><dl class="variablelist">
+<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),
+ SHA-256 (SHA256), GOST or SHA-384 (SHA384).
+ These values are case insensitive.
+ </p>
+ </dd>
+<dt><span class="term">-C</span></dt>
+<dd>
+ <p>
+ Generate CDS records rather than DS records. This is mutually
+ exclusive with generating lookaside records.
+ </p>
+ </dd>
+<dt><span class="term">-T <em class="replaceable"><code>TTL</code></em></span></dt>
+<dd>
+ <p>
+ Specifies the TTL of the DS records.
+ </p>
+ </dd>
+<dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt>
+<dd>
+ <p>
+ Look for key files (or, in keyset mode,
+ <code class="filename">keyset-</code> files) in
+ <code class="option">directory</code>.
+ </p>
+ </dd>
+<dt><span class="term">-f <em class="replaceable"><code>file</code></em></span></dt>
+<dd>
+ <p>
+ 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 <code class="option">file</code>. If the zone name is the same as
+ <code class="option">file</code>, then it may be omitted.
+ </p>
+ <p>
+ If <code class="option">file</code> is set to <code class="literal">"-"</code>, then
+ the zone data is read from the standard input. This makes it
+ possible to use the output of the <span class="command"><strong>dig</strong></span>
+ command as input, as in:
+ </p>
+ <p>
+ <strong class="userinput"><code>dig dnskey example.com | dnssec-dsfromkey -f - example.com</code></strong>
+ </p>
+ </dd>
+<dt><span class="term">-A</span></dt>
+<dd>
+ <p>
+ Include ZSKs 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.
+ </p>
+ </dd>
+<dt><span class="term">-l <em class="replaceable"><code>domain</code></em></span></dt>
+<dd>
+ <p>
+ Generate a DLV set instead of a DS set. The specified
+ <code class="option">domain</code> is appended to the name for each
+ record in the set.
+ The DNSSEC Lookaside Validation (DLV) RR is described
+ in RFC 4431. This is mutually exclusive with generating
+ CDS records.
+ </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.
+ </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 keyset or zone file mode.
+ </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">-h</span></dt>
+<dd>
+ <p>
+ Prints usage information.
+ </p>
+ </dd>
+<dt><span class="term">-V</span></dt>
+<dd>
+ <p>
+ Prints version information.
+ </p>
+ </dd>
+</dl></div>
+ </div>
+
+ <div class="refsection">
+<a name="id-1.9"></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="refsection">
+<a name="id-1.10"></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 generated 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="refsection">
+<a name="id-1.11"></a><h2>CAVEAT</h2>
+
+ <p>
+ A keyfile error can give a "file not found" even if the file exists.
+ </p>
+ </div>
+
+ <div class="refsection">
+<a name="id-1.12"></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 4431</em>.
+ <em class="citetitle">RFC 4509</em>.
+ </p>
+ </div>
+
+</div></body>
+</html>