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libmceliece: Download</title>
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libmceliece</div>
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<div class="navt away"><a href=index.html>Intro</a>
</div><div class="navt here">Download
</div><div class="navt away"><a href=install.html>Install</a>
</div><div class="navt away"><a href=api.html>API</a>
</div><div class="navt away"><a href=cli.html>CLI</a>
</div><div class="navt away"><a href=security.html>Security</a>
</div><div class="navt away"><a href=verification.html>Verification</a>
</div><div class="navt away"><a href=speed.html>Speed</a>
</div><div class="navt away"><a href=internals.html>Internals</a>
</div><div class="navt away"><a href=people.html>People</a>
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<p>To download and unpack the latest version of libmceliece:</p>
<pre><code>wget -m https://lib.mceliece.org/libmceliece-latest-version.txt
version=$(cat lib.mceliece.org/libmceliece-latest-version.txt)
wget -m https://lib.mceliece.org/libmceliece-$version.tar.gz
tar -xzf lib.mceliece.org/libmceliece-$version.tar.gz
cd libmceliece-$version
</code></pre>
<p>Then <a href="install.html">install</a>.</p>
<h3 id="changelog">Archives and changelog (reverse chronological)</h3>
<p><a href="libmceliece-20240513.tar.gz"><code>libmceliece-20240513.tar.gz</code></a> <a href="libmceliece-20240513.html">browse</a></p>
<p>Support <code>valgrind</code> in <code>mceliece-test</code>,
with help from <code>configure</code>.
(Subsequent plans:
use variable-length <code>malloc</code>
for variable-length functions.)</p>
<p>Cover <code>shared</code> directories for <code>checkinsns</code> and <code>checknamespace</code>.</p>
<p>Sort <code>ofiles</code> for reproducibility.
Thanks to Jan Mojzis for the suggestion.</p>
<p>Hide more symbols in <code>.so</code>.</p>
<p>MacOS X port:
<code>dylib</code>;
deal with <code>s</code> and <code>S</code> in <code>checknamespace</code>;
use <code>-flat_namespace</code> so <code>mceliece-test</code> can substitute <code>randombytes</code>.
(Infrastructure copied from lib25519.)</p>
<p>Support empty compiler lists.
(Infrastructure copied from lib25519.)</p>
<p>For compatibility with musl etc.,
support <code>constructor</code> as an alternative to <code>ifunc</code> for dispatch.
Select <code>constructor</code> automatically if an <code>ifunc</code> compile-time test fails,
or if <code>--notryifunc</code> is passed to <code>./configure</code>.
(Infrastructure copied from lib25519.)</p>
<p>Add <code>note.GNU-stack</code> to assembly.</p>
<p>Recognize <code>sun4v</code> as <code>sparc64</code>.</p>
<p>Port to CPUs that do not allow unaligned access.</p>
<p>Revamp <code>inttypes</code> support.
Make more use of the <code>inttypes</code> functions.</p>
<p>Factor <code>crypto_xof/bitwrite16</code>
out of <code>*/encrypt.c</code>,
and add new <code>bitwrite16</code> implementations.
Also support <code>nooverlap</code> option in <code>mceliece-test</code>,
and increase <code>maxtest</code> for <code>xof</code> to 16384.</p>
<p>Switch <code>avx/encrypt.c</code>
from <code>syndrome_asm</code> to new <code>xor_mat_vec256</code>.
Add support functions such as
<code>vec256_8x_shr</code>.</p>
<p>Factor <code>crypto_sort_int16</code>
out of <code>vec/encrypt.c</code>.
(Subsequent plans:
add faster <code>crypto_sort/int16</code> implementations,
and switch <code>avx/encrypt.c</code> from <code>int32</code> to <code>int16</code>.)</p>
<p>Factor <code>crypto_sort_int64</code>
out of <code>pk_gen.c</code>.</p>
<p>Use <code>crypto_sort_int32</code> directly without the <code>int32_sort</code> renaming.</p>
<p>Split <code>vec128_gf.h</code> and <code>vec256_gf.h</code>
out of <code>vec128.h</code> and <code>vec256.h</code>.
Distinguish <code>vec_mul_gf</code>
from <code>vec_mul_gf_using_64</code>
to allow more <code>.h</code> merging across sizes.</p>
<p>In <code>autogen/speed</code>,
allocate only <code>mceliece_kem_BYTES</code> for <code>T</code>
rather than <code>mceliece_kem_CIPHERTEXTBYTES</code>.</p>
<p>Switch speed measurements from medians to interquartile means.</p>
<p>Add page with examples of current speeds.</p>
<p>Add auto-generation warnings
for <code>mceliece*.c</code>.</p>
<p>Add manual pages for <code>mceliece-test</code> and <code>mceliece-speed</code>.</p>
<p>Improve readability of code blocks in HTML.</p>
<p>Remove unused <code>KAT</code> code segments.</p>
<p>Remove unused <code>bitrev</code>.</p>
<p>Remove unused <code>perm_check</code>.
Thanks to Simon Josefsson for the suggestion.</p>
<p>More explicitly initialize <code>pivots</code>
to silence an incorrect compiler warning.
Thanks to Simon Josefsson for the suggestion.</p>
<p><a href="libmceliece-20230612.tar.gz"><code>libmceliece-20230612.tar.gz</code></a> <a href="libmceliece-20230612.html">browse</a></p>
<p>In <code>*/avx/pk_gen.c</code>,
use merge exchange in <code>sort_rows()</code>
and slightly reduce the number of lines of <code>minmax_rows()</code>.</p>
<p>Rename <code>encrypt()</code> as <code>pke_encrypt()</code>,
to more portably avoid name collision with POSIX <code>encrypt()</code>.</p>
<p>Add more 0-initialization in the <code>to_bitslicing</code> functions.
This doesn't help a full correctness proof,
but it does make it easier to see that undefined data is not used.
Thanks to Thom Wiggers for the suggestion.</p>
<p>For MacOS portability,
move <code>#include "encrypt.h"</code> after other inclusions,
and change <code>.hidden</code> to <code>.private_extern</code> (via a new <code>ASM_HIDDEN</code>)
if <code>__APPLE__</code> is defined.
Thanks to Thom Wiggers for the suggestions.</p>
<p>Specify 32-byte alignment for some arrays passed to <code>.S</code> files
in the <code>avx</code> implementations.
The <code>.S</code> files use <code>movdqu</code> instead of <code>movdqa</code>,
so they don't need alignment,
but the alignment could avoid warnings
from a compiler that checks for potentially inadequate alignment.
Thanks to Thom Wiggers for the suggestion.</p>
<p>Remove an unused pointer increment at the end of <code>benes.c</code>.
Thanks to Thom Wiggers for the suggestion.</p>
<p>Add various <code>linker</code> lines in <code>.c</code> files and <code>.S</code> files;
split <code>operations.c</code> into <code>kem_{keypair,enc,dec}.c</code> and <code>wrap_{keypair,enc,dec}.c</code>;
and split big constant arrays from <code>fft.c</code>, <code>fft_tr.c</code>
into separate <code>shared-*.c</code> files.
The <code>linker</code> lines trigger an infrastructure mechanism
to unify compiled code across implementations,
reducing <code>.so</code> size;
the splits improve the effectiveness of this mechanism,
and reduce the amount of code linked
into programs that use only one or two of <code>{keypair,enc,dec}</code>.
Further changes to the infrastructure may remove the need for <code>wrap*.c</code>.</p>
<p>Add <code>const</code> to prototypes for input pointers for some functions.
More can be done here.</p>
<p>Change prototypes from <code>*</code> and <code>[]</code> to, e.g., <code>[GFBITS]</code>
when necessary to eliminate compiler warnings.</p>
<p>Move <code>gf_mul2</code> to <code>crypto_kem/6688128/avx/gf.h</code> from <code>gf.c</code>.</p>
<p>Consistently define <code>nBlocksI</code> as a macro rather than a const.
This is a step towards portability to compilers that fail to support C99.</p>
<p>Extend information in <code>architectures</code> files.
This supports libmceliece's run-time selection of implementations.</p>
<p>Switch from <code>CRYPTO_NAMESPACE</code> to <code>CRYPTO_SHARED_NAMESPACE</code>
for symbols defined in <code>.S</code> files.</p>
<p>Rename <code>crypto_hash.h</code> as <code>hash.h</code>,
and rewrite <code>hash.h</code> as a wrapper around <code>crypto_xof_shake256()</code>.</p>
<p>Switch <code>keypair</code> return value to <code>void</code>.</p>
<p>Remove <code>namespacing</code> files, <code>goal-*</code> files, and <code>api.h</code>.</p>
<p>Rename <code>kem/mceliece*</code> as <code>kem/*</code>.</p>
<p>Starting point:
<code>vec</code> and <code>avx</code> implementations
from official round-4 software release
(in <code>supercop-20221025</code>),
plus <code>crypto_sort/int32</code>
and <code>crypto_xof/shake256</code>,
plus infrastructure based on lib25519 infrastructure.</p><hr><font size=1><b>Version:</b>
This is version 2024.05.13 of the "Download" web page.
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