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42<a name="man.dnssec-signzone"></a><div class="titlepage"></div>
43<div class="refnamediv">
44<h2>Name</h2>
45<p><span class="application">dnssec-signzone</span> &#8212; DNSSEC zone signing tool</p>
46</div>
47<div class="refsynopsisdiv">
48<h2>Synopsis</h2>
49<div class="cmdsynopsis"><p><code class="command">dnssec-signzone</code>  [<code class="option">-a</code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-d <em class="replaceable"><code>directory</code></em></code>] [<code class="option">-D</code>] [<code class="option">-E <em class="replaceable"><code>engine</code></em></code>] [<code class="option">-e <em class="replaceable"><code>end-time</code></em></code>] [<code class="option">-f <em class="replaceable"><code>output-file</code></em></code>] [<code class="option">-g</code>] [<code class="option">-h</code>] [<code class="option">-K <em class="replaceable"><code>directory</code></em></code>] [<code class="option">-k <em class="replaceable"><code>key</code></em></code>] [<code class="option">-L <em class="replaceable"><code>serial</code></em></code>] [<code class="option">-l <em class="replaceable"><code>domain</code></em></code>] [<code class="option">-i <em class="replaceable"><code>interval</code></em></code>] [<code class="option">-I <em class="replaceable"><code>input-format</code></em></code>] [<code class="option">-j <em class="replaceable"><code>jitter</code></em></code>] [<code class="option">-N <em class="replaceable"><code>soa-serial-format</code></em></code>] [<code class="option">-o <em class="replaceable"><code>origin</code></em></code>] [<code class="option">-O <em class="replaceable"><code>output-format</code></em></code>] [<code class="option">-P</code>] [<code class="option">-p</code>] [<code class="option">-R</code>] [<code class="option">-r <em class="replaceable"><code>randomdev</code></em></code>] [<code class="option">-S</code>] [<code class="option">-s <em class="replaceable"><code>start-time</code></em></code>] [<code class="option">-T <em class="replaceable"><code>ttl</code></em></code>] [<code class="option">-t</code>] [<code class="option">-u</code>] [<code class="option">-v <em class="replaceable"><code>level</code></em></code>] [<code class="option">-V</code>] [<code class="option">-X <em class="replaceable"><code>extended end-time</code></em></code>] [<code class="option">-x</code>] [<code class="option">-z</code>] [<code class="option">-3 <em class="replaceable"><code>salt</code></em></code>] [<code class="option">-H <em class="replaceable"><code>iterations</code></em></code>] [<code class="option">-A</code>] {zonefile} [key...]</p></div>
50</div>
51<div class="refsection">
52<a name="id-1.14.12.7"></a><h2>DESCRIPTION</h2>
53<p><span class="command"><strong>dnssec-signzone</strong></span>
54      signs a zone.  It generates
55      NSEC and RRSIG records and produces a signed version of the
56      zone. The security status of delegations from the signed zone
57      (that is, whether the child zones are secure or not) is
58      determined by the presence or absence of a
59      <code class="filename">keyset</code> file for each child zone.
60    </p>
61</div>
62<div class="refsection">
63<a name="id-1.14.12.8"></a><h2>OPTIONS</h2>
64<div class="variablelist"><dl class="variablelist">
65<dt><span class="term">-a</span></dt>
66<dd><p>
67            Verify all generated signatures.
68          </p></dd>
69<dt><span class="term">-c <em class="replaceable"><code>class</code></em></span></dt>
70<dd><p>
71            Specifies the DNS class of the zone.
72          </p></dd>
73<dt><span class="term">-C</span></dt>
74<dd><p>
75            Compatibility mode: Generate a
76            <code class="filename">keyset-<em class="replaceable"><code>zonename</code></em></code>
77            file in addition to
78            <code class="filename">dsset-<em class="replaceable"><code>zonename</code></em></code>
79            when signing a zone, for use by older versions of
80            <span class="command"><strong>dnssec-signzone</strong></span>.
81          </p></dd>
82<dt><span class="term">-d <em class="replaceable"><code>directory</code></em></span></dt>
83<dd><p>
84            Look for <code class="filename">dsset-</code> or
85            <code class="filename">keyset-</code> files in <code class="option">directory</code>.
86          </p></dd>
87<dt><span class="term">-D</span></dt>
88<dd><p>
89	    Output only those record types automatically managed by
90	    <span class="command"><strong>dnssec-signzone</strong></span>, i.e. RRSIG, NSEC,
91	    NSEC3 and NSEC3PARAM records. If smart signing
92	    (<code class="option">-S</code>) is used, DNSKEY records are also
93	    included. The resulting file can be included in the original
94	    zone file with <span class="command"><strong>$INCLUDE</strong></span>. This option
95	    cannot be combined with <code class="option">-O raw</code> or serial
96	    number updating.
97          </p></dd>
98<dt><span class="term">-E <em class="replaceable"><code>engine</code></em></span></dt>
99<dd><p>
100            Uses a crypto hardware (OpenSSL engine) for the crypto operations
101            it supports, for instance signing with private keys from
102            a secure key store. When compiled with PKCS#11 support
103            it defaults to pkcs11; the empty name resets it to no engine.
104          </p></dd>
105<dt><span class="term">-g</span></dt>
106<dd><p>
107            Generate DS records for child zones from
108            <code class="filename">dsset-</code> or <code class="filename">keyset-</code>
109            file.  Existing DS records will be removed.
110          </p></dd>
111<dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt>
112<dd><p>
113            Key repository: Specify a directory to search for DNSSEC keys.
114            If not specified, defaults to the current directory.
115          </p></dd>
116<dt><span class="term">-k <em class="replaceable"><code>key</code></em></span></dt>
117<dd><p>
118            Treat specified key as a key signing key ignoring any
119            key flags.  This option may be specified multiple times.
120          </p></dd>
121<dt><span class="term">-l <em class="replaceable"><code>domain</code></em></span></dt>
122<dd><p>
123            Generate a DLV set in addition to the key (DNSKEY) and DS sets.
124            The domain is appended to the name of the records.
125          </p></dd>
126<dt><span class="term">-s <em class="replaceable"><code>start-time</code></em></span></dt>
127<dd><p>
128            Specify the date and time when the generated RRSIG records
129            become valid.  This can be either an absolute or relative
130            time.  An absolute start time is indicated by a number
131            in YYYYMMDDHHMMSS notation; 20000530144500 denotes
132            14:45:00 UTC on May 30th, 2000.  A relative start time is
133            indicated by +N, which is N seconds from the current time.
134            If no <code class="option">start-time</code> is specified, the current
135            time minus 1 hour (to allow for clock skew) is used.
136          </p></dd>
137<dt><span class="term">-e <em class="replaceable"><code>end-time</code></em></span></dt>
138<dd><p>
139            Specify the date and time when the generated RRSIG records
140            expire.  As with <code class="option">start-time</code>, an absolute
141            time is indicated in YYYYMMDDHHMMSS notation.  A time relative
142            to the start time is indicated with +N, which is N seconds from
143            the start time.  A time relative to the current time is
144            indicated with now+N.  If no <code class="option">end-time</code> is
145            specified, 30 days from the start time is used as a default.
146            <code class="option">end-time</code> must be later than
147            <code class="option">start-time</code>.
148          </p></dd>
149<dt><span class="term">-X <em class="replaceable"><code>extended end-time</code></em></span></dt>
150<dd>
151<p>
152            Specify the date and time when the generated RRSIG records
153            for the DNSKEY RRset will expire.  This is to be used in cases
154            when the DNSKEY signatures need to persist longer than
155            signatures on other records; e.g., when the private component
156            of the KSK is kept offline and the KSK signature is to be
157            refreshed manually.
158          </p>
159<p>
160            As with <code class="option">start-time</code>, an absolute
161            time is indicated in YYYYMMDDHHMMSS notation.  A time relative
162            to the start time is indicated with +N, which is N seconds from
163            the start time.  A time relative to the current time is
164            indicated with now+N.  If no <code class="option">extended end-time</code> is
165            specified, the value of <code class="option">end-time</code> is used as
166            the default.  (<code class="option">end-time</code>, in turn, defaults to
167            30 days from the start time.) <code class="option">extended end-time</code>
168            must be later than <code class="option">start-time</code>.
169          </p>
170</dd>
171<dt><span class="term">-f <em class="replaceable"><code>output-file</code></em></span></dt>
172<dd><p>
173            The name of the output file containing the signed zone.  The
174            default is to append <code class="filename">.signed</code> to
175            the input filename.  If <code class="option">output-file</code> is
176            set to <code class="literal">"-"</code>, then the signed zone is
177            written to the standard output, with a default output
178            format of "full".
179          </p></dd>
180<dt><span class="term">-h</span></dt>
181<dd><p>
182            Prints a short summary of the options and arguments to
183            <span class="command"><strong>dnssec-signzone</strong></span>.
184          </p></dd>
185<dt><span class="term">-V</span></dt>
186<dd><p>
187	    Prints version information.
188	  </p></dd>
189<dt><span class="term">-i <em class="replaceable"><code>interval</code></em></span></dt>
190<dd>
191<p>
192            When a previously-signed zone is passed as input, records
193            may be resigned.  The <code class="option">interval</code> option
194            specifies the cycle interval as an offset from the current
195            time (in seconds).  If a RRSIG record expires after the
196            cycle interval, it is retained.  Otherwise, it is considered
197            to be expiring soon, and it will be replaced.
198          </p>
199<p>
200            The default cycle interval is one quarter of the difference
201            between the signature end and start times.  So if neither
202            <code class="option">end-time</code> or <code class="option">start-time</code>
203            are specified, <span class="command"><strong>dnssec-signzone</strong></span>
204            generates
205            signatures that are valid for 30 days, with a cycle
206            interval of 7.5 days.  Therefore, if any existing RRSIG records
207            are due to expire in less than 7.5 days, they would be
208            replaced.
209          </p>
210</dd>
211<dt><span class="term">-I <em class="replaceable"><code>input-format</code></em></span></dt>
212<dd><p>
213            The format of the input zone file.
214	    Possible formats are <span class="command"><strong>"text"</strong></span> (default)
215	    and <span class="command"><strong>"raw"</strong></span>.
216	    This option is primarily intended to be used for dynamic
217            signed zones so that the dumped zone file in a non-text
218            format containing updates can be signed directly.
219	    The use of this option does not make much sense for
220	    non-dynamic zones.
221          </p></dd>
222<dt><span class="term">-j <em class="replaceable"><code>jitter</code></em></span></dt>
223<dd>
224<p>
225            When signing a zone with a fixed signature lifetime, all
226            RRSIG records issued at the time of signing expires
227            simultaneously.  If the zone is incrementally signed, i.e.
228            a previously-signed zone is passed as input to the signer,
229            all expired signatures have to be regenerated at about the
230            same time.  The <code class="option">jitter</code> option specifies a
231            jitter window that will be used to randomize the signature
232            expire time, thus spreading incremental signature
233            regeneration over time.
234          </p>
235<p>
236            Signature lifetime jitter also to some extent benefits
237            validators and servers by spreading out cache expiration,
238            i.e. if large numbers of RRSIGs don't expire at the same time
239            from all caches there will be less congestion than if all
240            validators need to refetch at mostly the same time.
241          </p>
242</dd>
243<dt><span class="term">-L <em class="replaceable"><code>serial</code></em></span></dt>
244<dd><p>
245            When writing a signed zone to 'raw' format, set the "source serial"
246            value in the header to the specified serial number.  (This is
247            expected to be used primarily for testing purposes.)
248          </p></dd>
249<dt><span class="term">-n <em class="replaceable"><code>ncpus</code></em></span></dt>
250<dd><p>
251            Specifies the number of threads to use.  By default, one
252            thread is started for each detected CPU.
253          </p></dd>
254<dt><span class="term">-N <em class="replaceable"><code>soa-serial-format</code></em></span></dt>
255<dd>
256<p>
257            The SOA serial number format of the signed zone.
258	    Possible formats are <span class="command"><strong>"keep"</strong></span> (default),
259            <span class="command"><strong>"increment"</strong></span> and
260	    <span class="command"><strong>"unixtime"</strong></span>.
261          </p>
262<div class="variablelist"><dl class="variablelist">
263<dt><span class="term"><span class="command"><strong>"keep"</strong></span></span></dt>
264<dd><p>Do not modify the SOA serial number.</p></dd>
265<dt><span class="term"><span class="command"><strong>"increment"</strong></span></span></dt>
266<dd><p>Increment the SOA serial number using RFC 1982
267                      arithmetics.</p></dd>
268<dt><span class="term"><span class="command"><strong>"unixtime"</strong></span></span></dt>
269<dd><p>Set the SOA serial number to the number of seconds
270	        since epoch.</p></dd>
271</dl></div>
272</dd>
273<dt><span class="term">-o <em class="replaceable"><code>origin</code></em></span></dt>
274<dd><p>
275            The zone origin.  If not specified, the name of the zone file
276            is assumed to be the origin.
277          </p></dd>
278<dt><span class="term">-O <em class="replaceable"><code>output-format</code></em></span></dt>
279<dd><p>
280            The format of the output file containing the signed zone.
281	    Possible formats are <span class="command"><strong>"text"</strong></span> (default)
282	    <span class="command"><strong>"full"</strong></span>, which is text output in a
283            format suitable for processing by external scripts,
284            and <span class="command"><strong>"raw"</strong></span> or <span class="command"><strong>"raw=N"</strong></span>,
285            which store the zone in a binary format for rapid loading
286            by <span class="command"><strong>named</strong></span>.  <span class="command"><strong>"raw=N"</strong></span>
287            specifies the format version of the raw zone file: if N
288            is 0, the raw file can be read by any version of
289            <span class="command"><strong>named</strong></span>; if N is 1, the file can be
290            read by release 9.9.0 or higher.  The default is 1.
291          </p></dd>
292<dt><span class="term">-p</span></dt>
293<dd><p>
294            Use pseudo-random data when signing the zone.  This is faster,
295            but less secure, than using real random data.  This option
296            may be useful when signing large zones or when the entropy
297            source is limited.
298          </p></dd>
299<dt><span class="term">-P</span></dt>
300<dd>
301<p>
302	    Disable post sign verification tests.
303          </p>
304<p>
305	    The post sign verification test ensures that for each algorithm
306	    in use there is at least one non revoked self signed KSK key,
307	    that all revoked KSK keys are self signed, and that all records
308	    in the zone are signed by the algorithm.
309	    This option skips these tests.
310          </p>
311</dd>
312<dt><span class="term">-Q</span></dt>
313<dd>
314<p>
315	    Remove signatures from keys that are no longer active.
316          </p>
317<p>
318            Normally, when a previously-signed zone is passed as input
319            to the signer, and a DNSKEY record has been removed and
320            replaced with a new one, signatures from the old key
321            that are still within their validity period are retained.
322	    This allows the zone to continue to validate with cached
323	    copies of the old DNSKEY RRset.  The <code class="option">-Q</code>
324            forces <span class="command"><strong>dnssec-signzone</strong></span> to remove
325            signatures from keys that are no longer active. This
326            enables ZSK rollover using the procedure described in
327            RFC 4641, section 4.2.1.1 ("Pre-Publish Key Rollover").
328          </p>
329</dd>
330<dt><span class="term">-R</span></dt>
331<dd>
332<p>
333	    Remove signatures from keys that are no longer published.
334          </p>
335<p>
336            This option is similar to <code class="option">-Q</code>, except it
337            forces <span class="command"><strong>dnssec-signzone</strong></span> to signatures from
338            keys that are no longer published. This enables ZSK rollover
339            using the procedure described in RFC 4641, section 4.2.1.2
340            ("Double Signature Zone Signing Key Rollover").
341          </p>
342</dd>
343<dt><span class="term">-r <em class="replaceable"><code>randomdev</code></em></span></dt>
344<dd><p>
345            Specifies the source of randomness.  If the operating
346            system does not provide a <code class="filename">/dev/random</code>
347            or equivalent device, the default source of randomness
348            is keyboard input.  <code class="filename">randomdev</code>
349            specifies
350            the name of a character device or file containing random
351            data to be used instead of the default.  The special value
352            <code class="filename">keyboard</code> indicates that keyboard
353            input should be used.
354          </p></dd>
355<dt><span class="term">-S</span></dt>
356<dd>
357<p>
358            Smart signing: Instructs <span class="command"><strong>dnssec-signzone</strong></span> to
359            search the key repository for keys that match the zone being
360            signed, and to include them in the zone if appropriate.
361          </p>
362<p>
363            When a key is found, its timing metadata is examined to
364            determine how it should be used, according to the following
365            rules.  Each successive rule takes priority over the prior
366            ones:
367          </p>
368<div class="variablelist"><dl class="variablelist">
369<dt></dt>
370<dd><p>
371                  If no timing metadata has been set for the key, the key is
372                  published in the zone and used to sign the zone.
373                </p></dd>
374<dt></dt>
375<dd><p>
376                  If the key's publication date is set and is in the past, the
377                  key is published in the zone.
378                </p></dd>
379<dt></dt>
380<dd><p>
381                  If the key's activation date is set and in the past, the
382                  key is published (regardless of publication date) and
383                  used to sign the zone.
384                </p></dd>
385<dt></dt>
386<dd><p>
387                  If the key's revocation date is set and in the past, and the
388                  key is published, then the key is revoked, and the revoked key
389                  is used to sign the zone.
390                </p></dd>
391<dt></dt>
392<dd><p>
393                  If either of the key's unpublication or deletion dates are set
394                  and in the past, the key is NOT published or used to sign the
395                  zone, regardless of any other metadata.
396                </p></dd>
397</dl></div>
398</dd>
399<dt><span class="term">-T <em class="replaceable"><code>ttl</code></em></span></dt>
400<dd><p>
401            Specifies a TTL to be used for new DNSKEY records imported
402            into the zone from the key repository.  If not
403            specified, the default is the TTL value from the zone's SOA
404            record.  This option is ignored when signing without
405            <code class="option">-S</code>, since DNSKEY records are not imported
406            from the key repository in that case.  It is also ignored if
407            there are any pre-existing DNSKEY records at the zone apex,
408            in which case new records' TTL values will be set to match
409            them, or if any of the imported DNSKEY records had a default
410            TTL value.  In the event of a a conflict between TTL values in
411            imported keys, the shortest one is used.
412          </p></dd>
413<dt><span class="term">-t</span></dt>
414<dd><p>
415            Print statistics at completion.
416          </p></dd>
417<dt><span class="term">-u</span></dt>
418<dd><p>
419            Update NSEC/NSEC3 chain when re-signing a previously signed
420            zone.  With this option, a zone signed with NSEC can be
421            switched to NSEC3, or a zone signed with NSEC3 can
422            be switch to NSEC or to NSEC3 with different parameters.
423            Without this option, <span class="command"><strong>dnssec-signzone</strong></span> will
424            retain the existing chain when re-signing.
425          </p></dd>
426<dt><span class="term">-v <em class="replaceable"><code>level</code></em></span></dt>
427<dd><p>
428            Sets the debugging level.
429          </p></dd>
430<dt><span class="term">-x</span></dt>
431<dd><p>
432            Only sign the DNSKEY RRset with key-signing keys, and omit
433            signatures from zone-signing keys.  (This is similar to the
434            <span class="command"><strong>dnssec-dnskey-kskonly yes;</strong></span> zone option in
435            <span class="command"><strong>named</strong></span>.)
436          </p></dd>
437<dt><span class="term">-z</span></dt>
438<dd><p>
439            Ignore KSK flag on key when determining what to sign.  This
440            causes KSK-flagged keys to sign all records, not just the
441            DNSKEY RRset.  (This is similar to the
442            <span class="command"><strong>update-check-ksk no;</strong></span> zone option in
443            <span class="command"><strong>named</strong></span>.)
444          </p></dd>
445<dt><span class="term">-3 <em class="replaceable"><code>salt</code></em></span></dt>
446<dd><p>
447            Generate an NSEC3 chain with the given hex encoded salt.
448	    A dash (<em class="replaceable"><code>salt</code></em>) can
449	    be used to indicate that no salt is to be used when generating		    the NSEC3 chain.
450          </p></dd>
451<dt><span class="term">-H <em class="replaceable"><code>iterations</code></em></span></dt>
452<dd><p>
453	    When generating an NSEC3 chain, use this many iterations.  The
454	    default is 10.
455          </p></dd>
456<dt><span class="term">-A</span></dt>
457<dd>
458<p>
459	    When generating an NSEC3 chain set the OPTOUT flag on all
460	    NSEC3 records and do not generate NSEC3 records for insecure
461	    delegations.
462          </p>
463<p>
464	    Using this option twice (i.e., <code class="option">-AA</code>)
465	    turns the OPTOUT flag off for all records.  This is useful
466	    when using the <code class="option">-u</code> option to modify an NSEC3
467	    chain which previously had OPTOUT set.
468          </p>
469</dd>
470<dt><span class="term">zonefile</span></dt>
471<dd><p>
472            The file containing the zone to be signed.
473          </p></dd>
474<dt><span class="term">key</span></dt>
475<dd><p>
476	    Specify which keys should be used to sign the zone.  If
477	    no keys are specified, then the zone will be examined
478	    for DNSKEY records at the zone apex.  If these are found and
479	    there are matching private keys, in the current directory,
480	    then these will be used for signing.
481          </p></dd>
482</dl></div>
483</div>
484<div class="refsection">
485<a name="id-1.14.12.9"></a><h2>EXAMPLE</h2>
486<p>
487      The following command signs the <strong class="userinput"><code>example.com</code></strong>
488      zone with the DSA key generated by <span class="command"><strong>dnssec-keygen</strong></span>
489      (Kexample.com.+003+17247).  Because the <span class="command"><strong>-S</strong></span> option
490      is not being used, the zone's keys must be in the master file
491      (<code class="filename">db.example.com</code>).  This invocation looks
492      for <code class="filename">dsset</code> files, in the current directory,
493      so that DS records can be imported from them (<span class="command"><strong>-g</strong></span>).
494    </p>
495<pre class="programlisting">% dnssec-signzone -g -o example.com db.example.com \
496Kexample.com.+003+17247
497db.example.com.signed
498%</pre>
499<p>
500      In the above example, <span class="command"><strong>dnssec-signzone</strong></span> creates
501      the file <code class="filename">db.example.com.signed</code>.  This
502      file should be referenced in a zone statement in a
503      <code class="filename">named.conf</code> file.
504    </p>
505<p>
506      This example re-signs a previously signed zone with default parameters.
507      The private keys are assumed to be in the current directory.
508    </p>
509<pre class="programlisting">% cp db.example.com.signed db.example.com
510% dnssec-signzone -o example.com db.example.com
511db.example.com.signed
512%</pre>
513</div>
514<div class="refsection">
515<a name="id-1.14.12.10"></a><h2>SEE ALSO</h2>
516<p><span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
517      <em class="citetitle">BIND 9 Administrator Reference Manual</em>,
518      <em class="citetitle">RFC 4033</em>, <em class="citetitle">RFC 4641</em>.
519    </p>
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