src - FreeBSD source tree

diff options


context:
space:
mode:

author	Doug Barton <dougb@FreeBSD.org>	2011-07-16 11:12:09 +0000
committer	Doug Barton <dougb@FreeBSD.org>	2011-07-16 11:12:09 +0000
commit	7afecc12f4d7b56f03438d5f41b837b9696f0a94 (patch)
tree	7873e6a2dac5f9ddbfefa3b07f3cf0570f682321 /contrib/bind9/doc/arm/man.isc-hmac-fixup.html
parent	a9285ae5c428d2017b1b907b8403ebe30f369bec (diff)
parent	473038528ab5bd55332138ebf791ab91a25f747b (diff)

Upgrade to version 9.8.0-P4

This version has many new features, see /usr/share/doc/bind9/README for details.

Notes

Notes: svn path=/head/; revision=224092

Diffstat (limited to 'contrib/bind9/doc/arm/man.isc-hmac-fixup.html')

-rw-r--r--

contrib/bind9/doc/arm/man.isc-hmac-fixup.html

122

1 files changed, 122 insertions, 0 deletions

diff --git a/contrib/bind9/doc/arm/man.isc-hmac-fixup.html b/contrib/bind9/doc/arm/man.isc-hmac-fixup.html
new file mode 100644
index 000000000000..bff6e912e4be
--- /dev/null
+++ b/contrib/bind9/doc/arm/man.isc-hmac-fixup.html

@@ -0,0 +1,122 @@

+<!--

+ -

+ - Permission to use, copy, modify, and/or distribute this software for any

+ - purpose with or without fee is hereby granted, provided that the above

+ - copyright notice and this permission notice appear in all copies.

+ -

+ - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH

+ - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY

+ - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,

+ - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM

+ - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE

+ - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR

+ - PERFORMANCE OF THIS SOFTWARE.

+-->

+

+<html>

+<head>

+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

+<title>isc-hmac-fixup</title>

+<meta name="generator" content="DocBook XSL Stylesheets V1.71.1">

+<link rel="start" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">

+<link rel="up" href="Bv9ARM.ch10.html" title="Manual pages">

+<link rel="prev" href="man.genrandom.html" title="genrandom">

+<link rel="next" href="man.nsec3hash.html" title="nsec3hash">

+</head>

+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">

+<div class="navheader">

+<table width="100%" summary="Navigation header">

+<tr><th colspan="3" align="center"><span class="application">isc-hmac-fixup</span></th></tr>

+<tr>

+<td width="20%" align="left">

+<a accesskey="p" href="man.genrandom.html">Prev</a>�</td>

+<th width="60%" align="center">Manual pages</th>

+<td width="20%" align="right">�<a accesskey="n" href="man.nsec3hash.html">Next</a>

+</td>

+</tr>

+</table>

+<hr>

+</div>

+<div class="refentry" lang="en">

+<a name="man.isc-hmac-fixup"></a><div class="titlepage"></div>

+<div class="refnamediv">

+<h2>Name</h2>

+<p><span class="application">isc-hmac-fixup</span> — fixes HMAC keys generated by older versions of BIND</p>

+</div>

+<div class="refsynopsisdiv">

+<h2>Synopsis</h2>

+<div class="cmdsynopsis"><p><code class="command">isc-hmac-fixup</code> {<em class="replaceable"><code>algorithm</code></em>} {<em class="replaceable"><code>secret</code></em>}</p></div>

+</div>

+<div class="refsect1" lang="en">

+<a name="id2650556"></a><h2>DESCRIPTION</h2>

+<p>

+ Versions of BIND 9 up to and including BIND 9.6 had a bug causing

+ HMAC-SHA* TSIG keys which were longer than the digest length of the

+ hash algorithm (i.e., SHA1 keys longer than 160 bits, SHA256 keys

+ longer than 256 bits, etc) to be used incorrectly, generating a

+ message authentication code that was incompatible with other DNS

+ implementations.

+ </p>

+<p>

+ This bug has been fixed in BIND 9.7. However, the fix may

+ cause incompatibility between older and newer versions of

+ BIND, when using long keys. <span><strong class="command">isc-hmac-fixup</strong></span>

+ modifies those keys to restore compatibility.

+ </p>

+<p>

+ To modify a key, run <span><strong class="command">isc-hmac-fixup</strong></span> and

+ specify the key's algorithm and secret on the command line. If the

+ secret is longer than the digest length of the algorithm (64 bytes

+ for SHA1 through SHA256, or 128 bytes for SHA384 and SHA512), then a

+ new secret will be generated consisting of a hash digest of the old

+ secret. (If the secret did not require conversion, then it will be

+ printed without modification.)

+ </p>

+</div>

+<div class="refsect1" lang="en">

+<a name="id2650584"></a><h2>SECURITY CONSIDERATIONS</h2>

+<p>

+ Secrets that have been converted by <span><strong class="command">isc-hmac-fixup</strong></span>

+ are shortened, but as this is how the HMAC protocol works in

+ operation anyway, it does not affect security. RFC 2104 notes,

+ "Keys longer than [the digest length] are acceptable but the

+ extra length would not significantly increase the function

+ strength."

+ </p>

+</div>

+<div class="refsect1" lang="en">

+<a name="id2650600"></a><h2>SEE ALSO</h2>

+<p>

+ <em class="citetitle">BIND 9 Administrator Reference Manual</em>,

+ <em class="citetitle">RFC 2104</em>.

+ </p>

+</div>

+<div class="refsect1" lang="en">

+<a name="id2650617"></a><h2>AUTHOR</h2>

+<p><span class="corpauthor">Internet Systems Consortium</span>

+ </p>

+</div>

+<div class="navfooter">

+<hr>

+<table width="100%" summary="Navigation footer">

+<tr>

+<td width="40%" align="left">

+<a accesskey="p" href="man.genrandom.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.nsec3hash.html">Next</a>

+</td>

+</tr>

+<tr>

+<td width="40%" align="left" valign="top">

+<span class="application">genrandom</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">nsec3hash</span>

+</td>

+</tr>

+</table>

+</div>

+</body>

+</html>