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+{{{
+#!htmlcomment
+
+This page is maintained automatically by a script.  Don't modify this page by hand,
+your changes will just be overwritten the next time the script runs.  Talk to your
+Friendly Neighborhood Repository Maintainer if you need to change something here.
+
+}}}
+
+{{{
+#!html
+<h1>cryptlib</h1>
+
+<h2>Introduction</h2>
+
+<p>This is a port of Peter Gutmann's
+<a href="https://www.cs.auckland.ac.nz/~pgut001/cryptlib/">cryptlib package</a>
+to the Cryptech project's environment.  This is a work in progress,
+and still at a very early stage as of this writing.</p>
+
+<p>The main addition to the stock cryptlib environment is a set of
+Hardware Adaption Layer (HAL) implementations that use the Cryptech
+FPGA cores.</p>
+
+<p>While we expect to be making more significant use of cryptlib in the
+future, the main purposes of this code at the moment are
+proof-of-concept and connecting the Cryptech cores to a more complete
+cryptographic programming environment for testing and development
+purposes.</p>
+
+<h2>Current status</h2>
+
+<p>At present, the Cryptech HAL code runs only on the Novena PVT1.  There
+are three variants of the HAL, all using the I2C bus, but speaking
+different protocols:</p>
+
+<ul>
+<li><p>An implementation using the <code>coretest</code> byte-stream protocol
+implemented by the <code>core/novena</code> FPGA build.</p></li>
+<li><p>An implementation using the simpler interface implemented by the
+<code>core/novena_i2c_simple</code> environment.</p></li>
+<li><p>An implementation using the <code>coretest</code> byt-stream protocol as
+implemented by the <code>test/novena_trng</code> FPGA build.  This differs from
+the others in that it supports the Cryptech TRNG.  Note that neither
+this HAL nor this FPGA build supports any cryptographic algorithms.</p></li>
+</ul>
+
+<p>All of these HAL implementations are in the <code>src/</code> directory.  See the
+<code>GNUmakefile</code> for details on how to select the variant you want.</p>
+
+<p>At present, the only relevant Cryptech cores are the TRNG and several
+digest algorithms.   The current HAL uses the SHA-1, SHA-256, and
+SHA-512 cores to implement the SHA-1, SHA-256, SHA-384, and SHA-512
+digests.  SHA-512/224 and SHA-512/256 are not supported.</p>
+
+<p>In principal there is no reason why one could not write a HAL which
+spoke to a Terasic board, perhaps via the <code>coretest</code> protocol over a
+UART, but to date this has not been done.</p>
+
+<h2>Code import status</h2>
+
+<p>Cryptlib itself is present in the repository in the form of a verbatim
+copy of the Cryptlib 3.4.2 distribution zipfile, which the top-level
+makefile unpacks while building.  This has proven simpler to work with
+than importing the entire Cryptlib distribution into a vendor branch.</p>
+
+<p>Packaging Cryptlib this way has two implications:</p>
+
+<ul>
+<li><p>You may need to <code>apt-get install unzip</code> on your Novena.</p></li>
+<li><p>Any changes you might make to Cryptlib itself will be lost when you
+run <code>make clean</code>.</p></li>
+</ul>
+
+<h2>Test code</h2>
+
+<p>The <code>tests/</code> directory contains a few test scripts, written in Python,
+using the standard Cryptlib Python bindings.  The Cryptlib Python
+environment is a fairly literaly translation of the Cryptlib C
+environment, so portions of it will be a bit, um, surprising to Python
+programmers, but the basic functionality works.  Note that it's normal
+for test scripts to fail when the functionality they're testing isn't
+loaded on the FPGA.</p>
+
+<h2>Copyright status</h2>
+
+<p>Cryptlib itself is copyright by Peter Gutmann.  See the Cryptlib web
+site for licensing details.</p>
+
+<p>Code written for the Cryptech project is under the usual Cryptech
+BSD-style license.</p>
+}}}
+
+[[RepositoryIndex(format=table,glob=sw/cryptlib)]]
+
+|| Clone `https://git.cryptech.is/sw/cryptlib.git` ||