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It can also generate keys for use with + TSIG (Transaction Signatures) as defined in RFC 2845, or TKEY + (Transaction Key) as defined in RFC 2930. + </p> +<p> + The <code class="option">name</code> of the key is specified on the command + line. For DNSSEC keys, this must match the name of the zone for + which the key is being generated. + </p> +</div> +<div class="refsect1" lang="en"> +<a name="id2617474"></a><h2>OPTIONS</h2> +<div class="variablelist"><dl> +<dt><span class="term">-a <em class="replaceable"><code>algorithm</code></em></span></dt> +<dd> +<p> + Selects the cryptographic algorithm. For DNSSEC keys, the value + of <code class="option">algorithm</code> must be one of RSAMD5, RSASHA1, + DSA, NSEC3RSASHA1, NSEC3DSA, RSASHA256, RSASHA512, ECCGOST, + ECDSAP256SHA256 or ECDSAP384SHA384. + For TSIG/TKEY, the value must + be DH (Diffie Hellman), HMAC-MD5, HMAC-SHA1, HMAC-SHA224, + HMAC-SHA256, HMAC-SHA384, or HMAC-SHA512. These values are + case insensitive. + </p> +<p> + If no algorithm is specified, then RSASHA1 will be used by + default, unless the <code class="option">-3</code> option is specified, + in which case NSEC3RSASHA1 will be used instead. (If + <code class="option">-3</code> is used and an algorithm is specified, + that algorithm will be checked for compatibility with NSEC3.) + </p> +<p> + Note 1: that for DNSSEC, RSASHA1 is a mandatory to implement + algorithm, and DSA is recommended. For TSIG, HMAC-MD5 is + mandatory. + </p> +<p> + Note 2: DH, HMAC-MD5, and HMAC-SHA1 through HMAC-SHA512 + automatically set the -T KEY option. + </p> +</dd> +<dt><span class="term">-b <em class="replaceable"><code>keysize</code></em></span></dt> +<dd> +<p> + Specifies the number of bits in the key. The choice of key + size depends on the algorithm used. RSA keys must be + between 512 and 2048 bits. Diffie Hellman keys must be between + 128 and 4096 bits. DSA keys must be between 512 and 1024 + bits and an exact multiple of 64. HMAC keys must be + between 1 and 512 bits. Elliptic curve algorithms don't need + this parameter. + </p> +<p> + The key size does not need to be specified if using a default + algorithm. The default key size is 1024 bits for zone signing + keys (ZSK's) and 2048 bits for key signing keys (KSK's, + generated with <code class="option">-f KSK</code>). However, if an + algorithm is explicitly specified with the <code class="option">-a</code>, + then there is no default key size, and the <code class="option">-b</code> + must be used. + </p> +</dd> +<dt><span class="term">-n <em class="replaceable"><code>nametype</code></em></span></dt> +<dd><p> + Specifies the owner type of the key. The value of + <code class="option">nametype</code> 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. Defaults to ZONE for DNSKEY + generation. + </p></dd> +<dt><span class="term">-3</span></dt> +<dd><p> + Use an NSEC3-capable algorithm to generate a DNSSEC key. + If this option is used and no algorithm is explicitly + set on the command line, NSEC3RSASHA1 will be used by + default. Note that RSASHA256, RSASHA512, ECCGOST, + ECDSAP256SHA256 and ECDSAP384SHA384 algorithms + are NSEC3-capable. + </p></dd> +<dt><span class="term">-C</span></dt> +<dd><p> + Compatibility mode: generates an old-style key, without + any metadata. By default, <span><strong class="command">dnssec-keygen</strong></span> + will include the key's creation date in the metadata stored + with the private key, and other dates may be set there as well + (publication date, activation date, etc). Keys that include + this data may be incompatible with older versions of BIND; the + <code class="option">-C</code> option suppresses them. + </p></dd> +<dt><span class="term">-c <em class="replaceable"><code>class</code></em></span></dt> +<dd><p> + Indicates that the DNS record containing the key should have + the specified class. If not specified, class IN is used. + </p></dd> +<dt><span class="term">-E <em class="replaceable"><code>engine</code></em></span></dt> +<dd><p> + Uses a crypto hardware (OpenSSL engine) for random number + and, when supported, key generation. When compiled with PKCS#11 + support it defaults to pkcs11; the empty name resets it to + no engine. + </p></dd> +<dt><span class="term">-f <em class="replaceable"><code>flag</code></em></span></dt> +<dd><p> + Set the specified flag in the flag field of the KEY/DNSKEY record. + The only recognized flags are KSK (Key Signing Key) and REVOKE. + </p></dd> +<dt><span class="term">-G</span></dt> +<dd><p> + Generate a key, but do not publish it or sign with it. This + option is incompatible with -P and -A. + </p></dd> +<dt><span class="term">-g <em class="replaceable"><code>generator</code></em></span></dt> +<dd><p> + If generating a Diffie Hellman key, use this generator. + Allowed values are 2 and 5. If no generator + is specified, a known prime from RFC 2539 will be used + if possible; otherwise the default is 2. + </p></dd> +<dt><span class="term">-h</span></dt> +<dd><p> + Prints a short summary of the options and arguments to + <span><strong class="command">dnssec-keygen</strong></span>. + </p></dd> +<dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt> +<dd><p> + Sets the directory in which the key files are to be written. + </p></dd> +<dt><span class="term">-k</span></dt> +<dd><p> + Deprecated in favor of -T KEY. + </p></dd> +<dt><span class="term">-L <em class="replaceable"><code>ttl</code></em></span></dt> +<dd><p> + Sets the default TTL to use for this key when it is converted + into a DNSKEY RR. If the key is imported into a zone, + this is the TTL that will be used for it, unless there was + already a DNSKEY RRset in place, in which case the existing TTL + would take precedence. Setting the default TTL to + <code class="literal">0</code> or <code class="literal">none</code> removes it. + </p></dd> +<dt><span class="term">-p <em class="replaceable"><code>protocol</code></em></span></dt> +<dd><p> + 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. + </p></dd> +<dt><span class="term">-q</span></dt> +<dd><p> + Quiet mode: Suppresses unnecessary output, including + progress indication. Without this option, when + <span><strong class="command">dnssec-keygen</strong></span> is run interactively + to generate an RSA or DSA key pair, it will print a string + of symbols to <code class="filename">stderr</code> indicating the + progress of the key generation. A '.' indicates that a + random number has been found which passed an initial + sieve test; '+' means a number has passed a single + round of the Miller-Rabin primality test; a space + means that the number has passed all the tests and is + a satisfactory key. + </p></dd> +<dt><span class="term">-r <em class="replaceable"><code>randomdev</code></em></span></dt> +<dd><p> + Specifies the source of randomness. If the operating + system does not provide a <code class="filename">/dev/random</code> + or equivalent device, the default source of randomness + is keyboard input. <code class="filename">randomdev</code> + specifies + the name of a character device or file containing random + data to be used instead of the default. The special value + <code class="filename">keyboard</code> indicates that keyboard + input should be used. + </p></dd> +<dt><span class="term">-S <em class="replaceable"><code>key</code></em></span></dt> +<dd><p> + Create a new key which is an explicit successor to an + existing key. The name, algorithm, size, and type of the + key will be set to match the existing key. The activation + date of the new key will be set to the inactivation date of + the existing one. The publication date will be set to the + activation date minus the prepublication interval, which + defaults to 30 days. + </p></dd> +<dt><span class="term">-s <em class="replaceable"><code>strength</code></em></span></dt> +<dd><p> + Specifies the strength value of the key. The strength is + a number between 0 and 15, and currently has no defined + purpose in DNSSEC. + </p></dd> +<dt><span class="term">-T <em class="replaceable"><code>rrtype</code></em></span></dt> +<dd> +<p> + Specifies the resource record type to use for the key. + <code class="option">rrtype</code> must be either DNSKEY or KEY. The + default is DNSKEY when using a DNSSEC algorithm, but it can be + overridden to KEY for use with SIG(0). + </p> +<p> + </p> +<p> + Using any TSIG algorithm (HMAC-* or DH) forces this option + to KEY. + </p> +</dd> +<dt><span class="term">-t <em class="replaceable"><code>type</code></em></span></dt> +<dd><p> + Indicates the use of the key. <code class="option">type</code> 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. + </p></dd> +<dt><span class="term">-v <em class="replaceable"><code>level</code></em></span></dt> +<dd><p> + Sets the debugging level. + </p></dd> +</dl></div> +</div> +<div class="refsect1" lang="en"> +<a name="id2669682"></a><h2>TIMING OPTIONS</h2> +<p> + Dates can be expressed in the format YYYYMMDD or YYYYMMDDHHMMSS. + If the argument begins with a '+' or '-', it is interpreted as + an offset from the present time. For convenience, if such an offset + is followed by one of the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi', + then the offset is computed in years (defined as 365 24-hour days, + ignoring leap years), months (defined as 30 24-hour days), weeks, + days, hours, or minutes, respectively. Without a suffix, the offset + is computed in seconds. + </p> +<div class="variablelist"><dl> +<dt><span class="term">-P <em class="replaceable"><code>date/offset</code></em></span></dt> +<dd><p> + Sets the date on which a key is to be published to the zone. + After that date, the key will be included in the zone but will + not be used to sign it. If not set, and if the -G option has + not been used, the default is "now". + </p></dd> +<dt><span class="term">-A <em class="replaceable"><code>date/offset</code></em></span></dt> +<dd><p> + Sets the date on which the key is to be activated. After that + date, the key will be included in the zone and used to sign + it. If not set, and if the -G option has not been used, the + default is "now". + </p></dd> +<dt><span class="term">-R <em class="replaceable"><code>date/offset</code></em></span></dt> +<dd><p> + Sets the date on which the key is to be revoked. After that + date, the key will be flagged as revoked. It will be included + in the zone and will be used to sign it. + </p></dd> +<dt><span class="term">-I <em class="replaceable"><code>date/offset</code></em></span></dt> +<dd><p> + Sets the date on which the key is to be retired. After that + date, the key will still be included in the zone, but it + will not be used to sign it. + </p></dd> +<dt><span class="term">-D <em class="replaceable"><code>date/offset</code></em></span></dt> +<dd><p> + Sets the date on which the key is to be deleted. After that + date, the key will no longer be included in the zone. (It + may remain in the key repository, however.) + </p></dd> +<dt><span class="term">-i <em class="replaceable"><code>interval</code></em></span></dt> +<dd> +<p> + Sets the prepublication interval for a key. If set, then + the publication and activation dates must be separated by at least + this much time. If the activation date is specified but the + publication date isn't, then the publication date will default + to this much time before the activation date; conversely, if + the publication date is specified but activation date isn't, + then activation will be set to this much time after publication. + </p> +<p> + If the key is being created as an explicit successor to another + key, then the default prepublication interval is 30 days; + otherwise it is zero. + </p> +<p> + As with date offsets, if the argument is followed by one of + the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi', then the + interval is measured in years, months, weeks, days, hours, + or minutes, respectively. Without a suffix, the interval is + measured in seconds. + </p> +</dd> +</dl></div> +</div> +<div class="refsect1" lang="en"> +<a name="id2669872"></a><h2>GENERATED KEYS</h2> +<p> + When <span><strong class="command">dnssec-keygen</strong></span> completes + successfully, + it prints a string of the form <code class="filename">Knnnn.+aaa+iiiii</code> + to the standard output. This is an identification string for + the key it has generated. + </p> +<div class="itemizedlist"><ul type="disc"> +<li><p><code class="filename">nnnn</code> is the key name. + </p></li> +<li><p><code class="filename">aaa</code> is the numeric representation + of the + algorithm. + </p></li> +<li><p><code class="filename">iiiii</code> is the key identifier (or + footprint). + </p></li> +</ul></div> +<p><span><strong class="command">dnssec-keygen</strong></span> + creates two files, with names based + on the printed string. <code class="filename">Knnnn.+aaa+iiiii.key</code> + contains the public key, and + <code class="filename">Knnnn.+aaa+iiiii.private</code> contains the + private + key. + </p> +<p> + The <code class="filename">.key</code> file contains a DNS KEY record + that + can be inserted into a zone file (directly or with a $INCLUDE + statement). + </p> +<p> + The <code class="filename">.private</code> file contains + algorithm-specific + fields. For obvious security reasons, this file does not have + general read permission. + </p> +<p> + Both <code class="filename">.key</code> and <code class="filename">.private</code> + files are generated for symmetric encryption algorithms such as + HMAC-MD5, even though the public and private key are equivalent. + </p> +</div> +<div class="refsect1" lang="en"> +<a name="id2669979"></a><h2>EXAMPLE</h2> +<p> + To generate a 768-bit DSA key for the domain + <strong class="userinput"><code>example.com</code></strong>, the following command would be + issued: + </p> +<p><strong class="userinput"><code>dnssec-keygen -a DSA -b 768 -n ZONE example.com</code></strong> + </p> +<p> + The command would print a string of the form: + </p> +<p><strong class="userinput"><code>Kexample.com.+003+26160</code></strong> + </p> +<p> + In this example, <span><strong class="command">dnssec-keygen</strong></span> creates + the files <code class="filename">Kexample.com.+003+26160.key</code> + and + <code class="filename">Kexample.com.+003+26160.private</code>. + </p> +</div> +<div class="refsect1" lang="en"> +<a name="id2670036"></a><h2>SEE ALSO</h2> +<p><span class="citerefentry"><span class="refentrytitle">dnssec-signzone</span>(8)</span>, + <em class="citetitle">BIND 9 Administrator Reference Manual</em>, + <em class="citetitle">RFC 2539</em>, + <em class="citetitle">RFC 2845</em>, + <em class="citetitle">RFC 4034</em>. + </p> +</div> +<div class="refsect1" lang="en"> +<a name="id2670067"></a><h2>AUTHOR</h2> +<p><span class="corpauthor">Internet Systems Consortium</span> + </p> +</div> +</div> +<div class="navfooter"> +<hr> +<table width="100%" summary="Navigation footer"> +<tr> +<td width="40%" align="left"> +<a accesskey="p" href="man.dnssec-keyfromlabel.html">Prev</a> </td> +<td width="20%" align="center"><a accesskey="u" href="Bv9ARM.ch10.html">Up</a></td> +<td width="40%" align="right"> <a accesskey="n" href="man.dnssec-revoke.html">Next</a> +</td> +</tr> +<tr> +<td width="40%" align="left" valign="top"> +<span class="application">dnssec-keyfromlabel</span> </td> +<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td> +<td width="40%" align="right" valign="top"> <span class="application">dnssec-revoke</span> +</td> +</tr> +</table> +</div> +</body> +</html> |
