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<h2 dir="auto">
<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true"></a>Description of problem:</h2>
<p dir="auto">On 32bit gnutls-cli --benchmark-ciphers produces wrong results. Same machine
64bit installation:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">Checking ciphers, payload size: 16384</span>
<span id="LC2" class="line" lang="plaintext"> 3DES-CBC 27.91 MB/sec</span>
<span id="LC3" class="line" lang="plaintext"> AES-128-CBC 1.34 GB/sec</span>
<span id="LC4" class="line" lang="plaintext"> SALSA20-256 0.62 GB/sec</span>
<span id="LC5" class="line" lang="plaintext"> NULL 35.20 GB/sec</span></code></pre>
<p dir="auto">and 32bit chroot:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">Checking ciphers, payload size: 16384</span>
<span id="LC2" class="line" lang="plaintext"> 3DES-CBC 27.19 MB/sec</span>
<span id="LC3" class="line" lang="plaintext"> AES-128-CBC 0.47 GB/sec</span>
<span id="LC4" class="line" lang="plaintext"> SALSA20-256 0.39 GB/sec</span>
<span id="LC5" class="line" lang="plaintext"> NULL 0.40 GB/sec</span></code></pre>
<h2 dir="auto">
<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true"></a>Version of gnutls used:</h2>
<p dir="auto">3.6.5, but it should be present in 3.6.6 also.</p>
<h2 dir="auto">
<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto">Debian</p>
<h2 dir="auto">
<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true"></a>How reproducible:</h2>
<p dir="auto">Always.</p>
<p dir="auto">Steps to Reproduce:</p>
<ul dir="auto">
<li>one Run gnutls-cli --benchmark-ciphers</li>
</ul>
<p dir="auto">This was found and diagnosed by Hiroyuki YAMAMORI as <a href="https://bugs.debian.org/920477" rel="nofollow noreferrer noopener" target="_blank">https://bugs.debian.org/920477</a>:</p>
<blockquote dir="auto">
<p>The following code is the cause.</p>
<p>"gnutls-3.6.5/src/benchmark.h" line 45</p>
</blockquote>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">struct benchmark_st {</span>
<span id="LC2" class="line" lang="plaintext"> struct timespec start;</span>
<span id="LC3" class="line" lang="plaintext"> unsigned long size; <== 32bit in i386 arch.</span>
<span id="LC4" class="line" lang="plaintext"> sighandler_t old_handler;</span>
<span id="LC5" class="line" lang="plaintext">#if defined(_WIN32)</span>
<span id="LC6" class="line" lang="plaintext"> HANDLE wtimer;</span>
<span id="LC7" class="line" lang="plaintext"> HANDLE wthread;</span>
<span id="LC8" class="line" lang="plaintext"> LARGE_INTEGER alarm_timeout;</span>
<span id="LC9" class="line" lang="plaintext">#endif</span></code></pre>
<blockquote dir="auto">
<p>This size variable will overflow.</p>
</blockquote>
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