I2P_Website/pages/licenses.html

<h1>Licenses</h1>
<p>As required by our threat model (among other reasons), the 
software developed to support the anonymous communication 
network we call I2P must be freely available, open source, 
and user modifiable.  To meet this criteria, we make use of
a variety of legal and software engineering techniques so
as to remove as many barriers to entry for those considering
making use of or contributing to the I2P effort.  </p>


<p>While the information below may be more confusing than just simply 
stating "I2P is BSD", "I2P is GPL", or "I2P is public domain",
the short answer to the question "How is I2P licensed?" is this:</p>

<h2>All software bundled in the I2P distributions will allow:</h2>
<ol>
 <li>use without fee</li>
 <li>use with no restrictions on how, when, where, why, or by whom is running it</li>

 <li>access to the source code without fee</li>
 <li>modifications to the source</li>
</ol>

<p>Most of the software guarantees much more - the ability of <b>anyone</b> to 
distribute the modified source however they choose.  However, not all of the 
software bundled provides this freedom - the GPL restricts the ability of 
developers who wish to integrate I2P with their own applications that are not 
themselves open source applications.  While we applaud the noble goals of 
increasing the resources in the commons, I2P is best served by removing any
barriers that stand in the way of its adoption - if a developer considering whether
they can integrate I2P with their application has to stop and check with their lawyer,
or conduct a code audit to make sure their own source can be released as GPL-compatible,
we lose out.</p>

<h2>Component licenses</h2>

<p>The I2P distribution contains several resources, reflecting the partitioning of 
the source code into components.  Each component has its own license, which all 
developers who contribute to it agree to - either by explicitly declaring the release
of code committed under a license compatible with that component, or by implicitly
releasing the code committed under the component's primary license.  Each of these 
components has a lead developer who has the final say as to what license is compatible
with the component's primary license, and the I2P project manager has the final say as
to what licenses meet the above four guarantees for inclusion in the I2P distribution. </p>

<table border="1">
 <tr>
  <td valign="top" align="left"><b>Component</b></td>
  <td valign="top" align="left"><b>CVS path</b></td>
  <td valign="top" align="left"><b>Resource</b></td>
  <td valign="top" align="left"><b>Primary license</b></td>

  <td valign="top" align="left"><b>Alternate licenses</b></td>
  <td valign="top" align="left"><b>Lead developer</b></td>
 </tr>
 <tr>
  <td valign="top" align="left"><b>I2P SDK</b></td>
  <td valign="top" align="left">core</td>
  <td valign="top" align="left">i2p.jar</td>

  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a></td>
  <td valign="top" align="left"><a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">jrandom</td>
 </tr>

 <tr>
  <td valign="top" align="left"><b>I2P Router</b></td>
  <td valign="top" align="left">router</td>
  <td valign="top" align="left">router.jar</td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a></td>
  <td valign="top" align="left"><a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />

      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">jrandom</td>
 </tr>
 <tr>
  <td valign="top" align="left"><b>ministreaming</b></td>
  <td valign="top" align="left">apps/ministreaming</td>

  <td valign="top" align="left">mstreaming.jar</td>
  <td valign="top" align="left"><a href="http://opensource.org/licenses/bsd-license.php">BSD</a></td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">mihi</td>

 </tr>
 <tr>
  <td valign="top" align="left"><b>I2PTunnel</b></td>
  <td valign="top" align="left">apps/i2ptunnel</td>
  <td valign="top" align="left">i2ptunnel.jar</td>
  <td valign="top" align="left"><a href="#javaException">GPL + exception</a></td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a><br />

      <a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">mihi</td>
 </tr>
 <tr>
  <td valign="top" align="left"><b>HTTPTunnel</b></td>

  <td valign="top" align="left">apps/httptunnel</td>
  <td valign="top" align="left">httptunnel.jar</td>
  <td valign="top" align="left"><a href="#javaException">GPL + exception</a></td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a><br />
      <a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />

      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">mihi</td>
 </tr>
 <tr>
  <td valign="top" align="left"><b>SAM bridge</b></td>
  <td valign="top" align="left">apps/sam</td>
  <td valign="top" align="left">i2psam.jar</td>

  <td valign="top" align="left"><a href="http://www.gnu.org/licenses/gpl.html">GPL</a></td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">aum</td>

 </tr>
 <tr>
  <td valign="top" align="left"><b>phttprelay</b></td>
  <td valign="top" align="left">apps/phttprelay</td>
  <td valign="top" align="left">phttprelay.war</td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a></td>
  <td valign="top" align="left"><a href="http://cryptix.org/docs/license.html">Cryptix<a><br />

      <a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>
  <td valign="top" align="left">jrandom</td>
 </tr>
 <tr>
  <td valign="top" align="left"><b>Installer</b></td>
  <td valign="top" align="left">installer</td>

  <td valign="top" align="left">install.jar, guiinstall.jar</td>
  <td valign="top" align="left"><a href="http://en.wikipedia.org/wiki/Public_domain">Public domain</a></td>
  <td valign="top" align="left"><a href="#javaException">GPL + exception</a><br />
      <a href="http://opensource.org/licenses/bsd-license.php">BSD</a><br />
      <a href="http://cryptix.org/docs/license.html">Cryptix<a><br />
      <a href="http://opensource.org/licenses/mit-license.html">MIT</a></td>

  <td valign="top" align="left">jrandom</td>
 </tr>
</table> 

<h3><a name="javaException">GPL + java exception</a></h3>
<p>While it may be redundant, just for clarity the <a href="http://www.fsf.org/licenses/gpl.html">GPL</a>'ed 
code included within I2PTunnel must be released under the GPL with an additional "exception" explicitly 
authorizing the use of Java's standard libraries:</p>

<p><code>
In addition, as a special exception, XXXX gives permission to link 
the code of this program with the proprietary Java implementation
provided by Sun (or other vendors as well), and distribute linked
combinations including the two. You must obey the GNU General
Public License in all respects for all of the code used other than
the proprietary Java implementation. If you modify this file, you
may extend this exception to your version of the file, but you are
not obligated to do so. If you do not wish to do so, delete this
exception statement from your version.
</code></p>

<p>
All source code under each component will by default be licensed under the primary license,
unless marked otherwise in the code.  All of the above is summary of the license terms - 
please see the specific license for the component or source code in question for authoritative
terms.  Component CVS locations and resource packaging may be changed if the repository 
is reorganized.</p>

<h2>CVS commit priviliges</h2>
<p>All developers must explicitly agree with the above terms to receive commit access to I2P's
CVS repository.  That means that they affirm that:</p>
<ul>
 <li>unless marked otherwise, all code they commit is implicitly licensed under the component's
     primary license</li>
 <li>if specified in the source, the code may be explicitly licensed under one of the component's
     alternate licenses</li>
 <li>they have the right to release the code they commit under the terms they are committing it</li>

</ul>

<p>If anyone is aware of any instances where the above conditions are not met, please contact the
component lead and/or the I2P project manager with further information.</p>