forked from I2P_Developers/i2p.www
54 lines
2.6 KiB
HTML
54 lines
2.6 KiB
HTML
{% extends "_layout.html" %}
|
|
{% block title %}jbigi{% endblock %}
|
|
{% block content %}<p>Using JNI (Java Native Interface), a bit of C code (thanks ugha!), a little
|
|
manual work and a piece of chewinggum it is possible to make the public key
|
|
cryptography quite a bit faster.</p>
|
|
|
|
<h2>Requirements</h2>
|
|
<p>This works on Linux, and with a few changes in build.sh probably also on
|
|
other platforms. FreeBSD has also been reported to work too. On Kaffee the
|
|
speedup is very small, because it already uses native BitInteger internally.
|
|
Blackdown seems to cause strange errors. Because you are going to do
|
|
compilation, you need JDK; JRE won't work.</p>
|
|
<p>The required code is available in CVS and the latest source tarball.</p>
|
|
<p>The GNU MP Bignum library (libgmp) needs to be installed, if it isn't
|
|
included in your OS / distribution or installed already, it can be received from
|
|
<a href="http://www.swox.com/gmp/">http://www.swox.com/gmp/</a>. Even if you
|
|
have already installed it as binary, it might still be worth a try to compile
|
|
GMP yourself, since then it will be able to use the specific instructions of
|
|
your processor.</p>
|
|
|
|
<h2>Step-by-step instructions</h2>
|
|
<ol>
|
|
<li>Look on <a href="http://localhost:7655/routerStats.html">http://localhost:7655/routerStats.html</a>
|
|
to see what the values for <code>crypto.elGamal.decrypt</code> and
|
|
<code>crypto.elGamal.encrypt</code> are. Copy this somewhere so you can compare
|
|
it later on.</li>
|
|
<li>Get the latest sourcecode</li>
|
|
<li>Inside the source tree change directory to: <code>core/c</code></li>
|
|
<li>Take a look at <code>build.sh</code>, if your <code>JAVA_HOME</code>
|
|
environment variable is set and you are using Linux then it might just work.
|
|
Otherwise change the settings.</li>
|
|
<li>Run <code>build.sh</code><br/>
|
|
A file named <code>libjbigi.so</code> should be created in the current
|
|
directory. If this doesn't happen and/or you get errors then please report
|
|
them.<br/>
|
|
Also some tests are done. Read the final lines of output for some additional
|
|
info, it will be something like this:
|
|
<pre>
|
|
native run time: 5842ms ( 57ms each)
|
|
java run time: 41072ms (406ms each)
|
|
native = 14.223802103622907% of pure java time
|
|
</pre>
|
|
If the native is indeed 5-7x faster then it looks all good. If not, please
|
|
report.</li>
|
|
<li>Copy <code>libjbigi.so</code> to your i2p directory</li>
|
|
<li>Restart your I2P programs.</li>
|
|
<li>On
|
|
<a href="http://localhost:7655/routerStats.html">http://localhost:7655/routerStats.html</a>
|
|
the <code>crypto.elGamal.decrypt</code> and <code>crypto.elGamal.encrypt</code>
|
|
should be a lot faster.</li>
|
|
</ol>
|
|
|
|
<p>Feedback is appreciated</p>
|
|
{% endblock %} |