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<refentry id="man.dnssec-keyfromlabel">
  <refentryinfo>
    <date>February 8, 2008</date>
  </refentryinfo>

  <refmeta>
    <refentrytitle><application>dnssec-keyfromlabel</application></refentrytitle>
    <manvolnum>8</manvolnum>
    <refmiscinfo>BIND9</refmiscinfo>
  </refmeta>

  <refnamediv>
    <refname><application>dnssec-keyfromlabel</application></refname>
    <refpurpose>DNSSEC key generation tool</refpurpose>
  </refnamediv>

  <docinfo>
    <copyright>
      <year>2008</year>
      <year>2010</year>
      <holder>Internet Systems Consortium, Inc. ("ISC")</holder>
    </copyright>
  </docinfo>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>dnssec-keyfromlabel</command>
      <arg choice="req">-a <replaceable class="parameter">algorithm</replaceable></arg>
      <arg choice="req">-l <replaceable class="parameter">label</replaceable></arg>
      <arg><option>-c <replaceable class="parameter">class</replaceable></option></arg>
      <arg><option>-f <replaceable class="parameter">flag</replaceable></option></arg>
      <arg><option>-k</option></arg>
      <arg><option>-n <replaceable class="parameter">nametype</replaceable></option></arg>
      <arg><option>-p <replaceable class="parameter">protocol</replaceable></option></arg>
      <arg><option>-t <replaceable class="parameter">type</replaceable></option></arg>
      <arg><option>-v <replaceable class="parameter">level</replaceable></option></arg>
      <arg choice="req">name</arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>DESCRIPTION</title>
    <para><command>dnssec-keyfromlabel</command>
      gets keys with the given label from a crypto hardware and builds
      key files for DNSSEC (Secure DNS), as defined in RFC 2535
      and RFC 4034.  
    </para>
  </refsect1>

  <refsect1>
    <title>OPTIONS</title>

    <variablelist>
      <varlistentry>
        <term>-a <replaceable class="parameter">algorithm</replaceable></term>
        <listitem>
	  <para>
	    Selects the cryptographic algorithm.  The value of
	    <option>algorithm</option> must be one of RSAMD5,
 	    RSASHA1, DSA, NSEC3RSASHA1, NSEC3DSA, RSASHA256,
 	    RSASHA512 or DH (Diffie Hellman).
	    These values are case insensitive.
	  </para>
          <para>
            If no algorithm is specified, then RSASHA1 will be used by
            default, unless the <option>-3</option> option is specified,
            in which case NSEC3RSASHA1 will be used instead.  (If
            <option>-3</option> is used and an algorithm is specified,
            that algorithm will be checked for compatibility with NSEC3.)
          </para>
          <para>
            Note 1: that for DNSSEC, RSASHA1 is a mandatory to implement
            algorithm, and DSA is recommended.
          </para>
          <para>
            Note 2: DH automatically sets the -k flag.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-l <replaceable class="parameter">label</replaceable></term>
        <listitem>
          <para>
            Specifies the label of keys in the crypto hardware
            (PKCS#11 device).
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-n <replaceable class="parameter">nametype</replaceable></term>
        <listitem>
          <para>
            Specifies the owner type of the key.  The value of
            <option>nametype</option> must either be ZONE (for a DNSSEC
            zone key (KEY/DNSKEY)), HOST or ENTITY (for a key associated with
            a host (KEY)),
            USER (for a key associated with a user(KEY)) or OTHER (DNSKEY).
            These values are
            case insensitive.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-c <replaceable class="parameter">class</replaceable></term>
        <listitem>
          <para>
            Indicates that the DNS record containing the key should have
            the specified class.  If not specified, class IN is used.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-f <replaceable class="parameter">flag</replaceable></term>
        <listitem>
          <para>
            Set the specified flag in the flag field of the KEY/DNSKEY record.
            The only recognized flag is KSK (Key Signing Key) DNSKEY.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-h</term>
        <listitem>
          <para>
            Prints a short summary of the options and arguments to
            <command>dnssec-keygen</command>.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-k</term>
        <listitem>
          <para>
            Generate KEY records rather than DNSKEY records.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-p <replaceable class="parameter">protocol</replaceable></term>
        <listitem>
          <para>
            Sets the protocol value for the generated key.  The protocol
            is a number between 0 and 255.  The default is 3 (DNSSEC).
            Other possible values for this argument are listed in
            RFC 2535 and its successors.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>-t <replaceable class="parameter">type</replaceable></term>
        <listitem>
          <para>
            Indicates the use of the key.  <option>type</option> must be
            one of AUTHCONF, NOAUTHCONF, NOAUTH, or NOCONF.  The default
            is AUTHCONF.  AUTH refers to the ability to authenticate
            data, and CONF the ability to encrypt data.
          </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>GENERATED KEY FILES</title>
    <para>
      When <command>dnssec-keyfromlabel</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 files 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-keyfromlabel</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>
  </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 4034</citetitle>.
    </para>
  </refsect1>

  <refsect1>
    <title>AUTHOR</title>
    <para><corpauthor>Internet Systems Consortium</corpauthor>
    </para>
  </refsect1>

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