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<refentry id="man.dnssec-dsfromkey">
<refentryinfo>
<date>August 26, 2009</date>
</refentryinfo>
<refmeta>
<refentrytitle><application>dnssec-dsfromkey</application></refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo>BIND9</refmiscinfo>
</refmeta>
<refnamediv>
<refname><application>dnssec-dsfromkey</application></refname>
<refpurpose>DNSSEC DS RR generation tool</refpurpose>
</refnamediv>
<docinfo>
<copyright>
<year>2008</year>
<year>2009</year>
<year>2010</year>
<holder>Internet Systems Consortium, Inc. ("ISC")</holder>
</copyright>
</docinfo>
<refsynopsisdiv>
<cmdsynopsis>
<command>dnssec-dsfromkey</command>
<arg><option>-v <replaceable class="parameter">level</replaceable></option></arg>
<arg><option>-1</option></arg>
<arg><option>-2</option></arg>
<arg><option>-a <replaceable class="parameter">alg</replaceable></option></arg>
<arg><option>-l <replaceable class="parameter">domain</replaceable></option></arg>
<arg choice="req">keyfile</arg>
</cmdsynopsis>
<cmdsynopsis>
<command>dnssec-dsfromkey</command>
<arg choice="req">-s</arg>
<arg><option>-1</option></arg>
<arg><option>-2</option></arg>
<arg><option>-a <replaceable class="parameter">alg</replaceable></option></arg>
<arg><option>-K <replaceable class="parameter">directory</replaceable></option></arg>
<arg><option>-l <replaceable class="parameter">domain</replaceable></option></arg>
<arg><option>-s</option></arg>
<arg><option>-c <replaceable class="parameter">class</replaceable></option></arg>
<arg><option>-f <replaceable class="parameter">file</replaceable></option></arg>
<arg><option>-A</option></arg>
<arg><option>-v <replaceable class="parameter">level</replaceable></option></arg>
<arg choice="req">dnsname</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para><command>dnssec-dsfromkey</command>
outputs the Delegation Signer (DS) resource record (RR), as defined in
RFC 3658 and RFC 4509, for the given key(s).
</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<variablelist>
<varlistentry>
<term>-1</term>
<listitem>
<para>
Use SHA-1 as the digest algorithm (the default is to use
both SHA-1 and SHA-256).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-2</term>
<listitem>
<para>
Use SHA-256 as the digest algorithm.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-a <replaceable class="parameter">algorithm</replaceable></term>
<listitem>
<para>
Select the digest algorithm. The value of
<option>algorithm</option> must be one of SHA-1 (SHA1),
SHA-256 (SHA256) or GOST. These values are case insensitive.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-K <replaceable class="parameter">directory</replaceable></term>
<listitem>
<para>
Look for key files (or, in keyset mode,
<filename>keyset-</filename> files) in
<option>directory</option>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-f <replaceable class="parameter">file</replaceable></term>
<listitem>
<para>
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 <option>file</option>. If the zone name is the same as
<option>file</option>, then it may be omitted.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-A</term>
<listitem>
<para>
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.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-l <replaceable class="parameter">domain</replaceable></term>
<listitem>
<para>
Generate a DLV set instead of a DS set. The specified
<option>domain</option> is appended to the name for each
record in the set.
The DNSSEC Lookaside Validation (DLV) RR is described
in RFC 4431.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-s</term>
<listitem>
<para>
Keyset mode: in place of the keyfile name, the argument is
the DNS domain name of a keyset file.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-c <replaceable class="parameter">class</replaceable></term>
<listitem>
<para>
Specifies the DNS class (default is IN). Useful only
in keyset or zone file mode.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-v <replaceable class="parameter">level</replaceable></term>
<listitem>
<para>
Sets the debugging level.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>EXAMPLE</title>
<para>
To build the SHA-256 DS RR from the
<userinput>Kexample.com.+003+26160</userinput>
keyfile name, the following command would be issued:
</para>
<para><userinput>dnssec-dsfromkey -2 Kexample.com.+003+26160</userinput>
</para>
<para>
The command would print something like:
</para>
<para><userinput>example.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0 C5EA0B94</userinput>
</para>
</refsect1>
<refsect1>
<title>FILES</title>
<para>
The keyfile can be designed by the key identification
<filename>Knnnn.+aaa+iiiii</filename> or the full file name
<filename>Knnnn.+aaa+iiiii.key</filename> as generated by
<refentrytitle>dnssec-keygen</refentrytitle><manvolnum>8</manvolnum>.
</para>
<para>
The keyset file name is built from the <option>directory</option>,
the string <filename>keyset-</filename> and the
<option>dnsname</option>.
</para>
</refsect1>
<refsect1>
<title>CAVEAT</title>
<para>
A keyfile error can give a "file not found" even if the file exists.
</para>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para><citerefentry>
<refentrytitle>dnssec-keygen</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>dnssec-signzone</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citetitle>BIND 9 Administrator Reference Manual</citetitle>,
<citetitle>RFC 3658</citetitle>,
<citetitle>RFC 4431</citetitle>.
<citetitle>RFC 4509</citetitle>.
</para>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para><corpauthor>Internet Systems Consortium</corpauthor>
</para>
</refsect1>
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