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Content-type: text/html
<HTML><HEAD><TITLE>Manpage of IPSEC_NEWHOSTKEY</TITLE>
</HEAD><BODY>
<H1>IPSEC_NEWHOSTKEY</H1>
Section: Maintenance Commands (8)<BR>Updated: 4 March 2002<BR><A HREF="#index">Index</A>
<A HREF="http://localhost/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="lbAB"> </A>
<H2>NAME</H2>
ipsec newhostkey - generate a new host authentication key
<A NAME="lbAC"> </A>
<H2>SYNOPSIS</H2>
<B>ipsec</B>
<B>newhostkey</B>
<B>--output</B>
filename
[
<B>--quiet</B>
]
<B>\</B>
<BR>
[
<B>--bits</B>
n
]
[
<B>--hostname</B>
host
]
<A NAME="lbAD"> </A>
<H2>DESCRIPTION</H2>
<I>Newhostkey</I>
outputs (into
<I>filename</I>,
which can be `<B>-</B>' for standard output)
an RSA private key suitable for this host,
in
<I>/etc/ipsec.secrets</I>
format
(see
<I><A HREF="ipsec.secrets.5.html">ipsec.secrets</A></I>(5)).
Normally,
<I>newhostkey</I>
invokes
<I>rsasigkey</I>
(see
<I><A HREF="ipsec_rsasigkey.8.html">ipsec_rsasigkey</A></I>(8))
with the
<B>--verbose</B>
option, so a narrative of what is being done appears on standard error.
<P>
The
<B>--output</B>
specifier, although it is syntactically an option and can appear at
any point among the options (it doesn't have to be first),
is not optional.
The specified
<I>filename</I>
is created under umask
<B>077</B>
if nonexistent;
if it already exists and is non-empty,
a warning message about that is sent to standard error,
and the output is appended to the file.
<P>
The
<B>--quiet</B>
option suppresses both the
<I>rsasigkey</I>
narrative and the existing-file warning message.
<P>
The
<B>--bits</B>
option specifies the number of bits in the key;
the current default is 2192 and we do not recommend use of anything
shorter unless unusual constraints demand it.
<P>
The
<B>--hostname</B>
option is passed through to
<I>rsasigkey</I>
to tell it what host name to label the output with
(via its
<B>--hostname</B>
option).
<P>
The output format is that of
<I>rsasigkey</I>,
with bracketing added to complete the
<I>ipsec.secrets</I>
format.
In the usual case, where
<I>ipsec.secrets</I>
contains only the host's own private key,
the output of
<I>newhostkey</I>
is sufficient as a complete
<I>ipsec.secrets</I>
file.
<A NAME="lbAE"> </A>
<H2>SEE ALSO</H2>
<A HREF="ipsec.secrets.5.html">ipsec.secrets</A>(5), <A HREF="ipsec_rsasigkey.8.html">ipsec_rsasigkey</A>(8)
<A NAME="lbAF"> </A>
<H2>HISTORY</H2>
Written for the Linux FreeS/WAN project
<<A HREF="http://www.freeswan.org">http://www.freeswan.org</A>>
by Henry Spencer.
<A NAME="lbAG"> </A>
<H2>BUGS</H2>
As with
<I>rsasigkey</I>,
the run time is difficult to predict,
since depletion of the system's randomness pool can cause
arbitrarily long waits for random bits,
and the prime-number searches can also take unpredictable
(and potentially large) amounts of CPU time.
See
<I><A HREF="ipsec_rsasigkey.8.html">ipsec_rsasigkey</A></I>(8)
for some typical performance numbers.
<P>
A higher-level tool which could handle the clerical details
of changing to a new key would be helpful.
<P>
The requirement for
<B>--output</B>
is a blemish,
but private keys are extremely sensitive information
and unusual precautions seem justified.
<P>
<HR>
<A NAME="index"> </A><H2>Index</H2>
<DL>
<DT><A HREF="#lbAB">NAME</A><DD>
<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT><A HREF="#lbAE">SEE ALSO</A><DD>
<DT><A HREF="#lbAF">HISTORY</A><DD>
<DT><A HREF="#lbAG">BUGS</A><DD>
</DL>
<HR>
This document was created by
<A HREF="http://localhost/cgi-bin/man/man2html">man2html</A>,
using the manual pages.<BR>
Time: 21:40:18 GMT, November 11, 2003
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