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<a href="https://gitlab.com/MocioF">Giuseppe Foti</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1496">#1496</a>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 0 0 16px;" align="initial">
<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Description of problem:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">I run the command <code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-weight: inherit; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>certtool --generate-privkey</code> on a LXD container with a gentoo image.
The program fails with:
<code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; font-weight: inherit; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>Illegal instruction (core dumped).</code></p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Running certtool on gdb the error received is:</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" lang="plaintext" v-pre="true" style='display: block; font-size: 14px; color: #333238; line-height: 1.6em; overflow-x: auto; border-radius: 4px; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: 0.875rem; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: 4px; white-space: pre; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">Program received signal SIGILL, Illegal instruction.</span>
<span id="LC2" class="line" lang="plaintext">0x00007ffff784a8dd in _nettle_sha256_compress_n () from /usr/lib64/libnettle.so.8</span></code></pre>
<copy-code></copy-code>
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">libnettle.so.8 was built on the same container that built version 3.9.1 of dev-libs/nettle using this ebuild:
<a href="https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-libs/nettle/nettle-3.9.1.ebuild" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-libs/nettle/nettle-3.9.1.ebuild</a>
and with those CPU_FLAGS_X86 enabled: aes pclmul sha
(read here for hints about what CPU_FLAGS_ are in gentoo: <a href="https://wiki.gentoo.org/wiki/CPU_FLAGS" rel="nofollow noreferrer noopener" target="_blank">https://wiki.gentoo.org/wiki/CPU_FLAGS</a>_*)</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">After rebuilding dev-libs/nettle-3.9.1 disabling the "sha" CPU_FLAGS_X86 certtool works as expected
<strong style="font-weight: bold; margin-top: 0;">The cpu_flags_x86_sha passes the x86-sha-ni arg to the compiler</strong></p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Version of gnutls used:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">3.8.0
<a href="https://packages.gentoo.org/packages/net-libs/gnutls" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://packages.gentoo.org/packages/net-libs/gnutls</a>
<a href="https://gitweb.gentoo.org/repo/gentoo.git/tree/net-libs/gnutls/gnutls-3.8.0.ebuild" rel="nofollow noreferrer noopener" target="_blank">https://gitweb.gentoo.org/repo/gentoo.git/tree/net-libs/gnutls/gnutls-3.8.0.ebuild</a></p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Gentoo</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>How reproducible:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Steps to Reproduce:</p>
<ul dir="auto" style="text-align: initial; list-style-type: disc; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build <a href="https://git.lysator.liu.se/nettle/nettle/-/tags/nettle_3.9.1_release_20230601" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://git.lysator.liu.se/nettle/nettle/-/tags/nettle_3.9.1_release_20230601</a> with x86-sha-ni ARG on configure</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">build gnutls-3.8.0</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">run <code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>certtool --generate-privkey</code>
</li>
</ul>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-actual-results" class="anchor" href="#actual-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Actual results:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">The program fails with Illegal instruction (core dumped).</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-expected-results" class="anchor" href="#expected-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Expected results:</h2>
<p dir="auto" style="color: #333238; margin: 0;" align="initial">Private Key generated</p>
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