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<title>nng_tls_config_ca_file(3tls)</title>
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<h1>nng_tls_config_ca_file(3tls) Manual Page</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_synopsis">SYNOPSIS</a></li>
<li><a href="#_description">DESCRIPTION</a></li>
<li><a href="#_return_values">RETURN VALUES</a></li>
<li><a href="#_errors">ERRORS</a></li>
<li><a href="#_see_also">SEE ALSO</a></li>
</ul>
</div>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>nng_tls_config_ca_file - load certificate authority from file</p>
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</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="pygments highlight"><code data-lang="c"><span></span><span class="tok-cp">#include</span> <span class="tok-cpf"><nng/nng.h></span><span class="tok-cp"></span>
<span class="tok-cp">#include</span> <span class="tok-cpf"><nng/supplemental/tls/tls.h></span><span class="tok-cp"></span>
<span class="tok-kt">int</span> <span class="tok-nf">nng_tls_config_ca_file</span><span class="tok-p">(</span><span class="tok-n">nng_tls_config</span> <span class="tok-o">*</span><span class="tok-n">cfg</span><span class="tok-p">,</span> <span class="tok-k">const</span> <span class="tok-kt">char</span> <span class="tok-o">*</span><span class="tok-n">path</span><span class="tok-p">);</span></code></pre>
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<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The <code>nng_tls_config_ca_file()</code> function configures the certificate authority
certificate chain and optional revocation list by loading the certificates
(and revocation list if present) from a single named file.
The file must at least one X.509 certificate in
<a href="https://tools.ietf.org/html/rfc7468">PEM</a>
format, and may contain multiple such certificates, as well as zero or
more PEM CRL objects.
This information is used to validate certificates
that are presented by peers, when using the configuration <em>cfg</em>.</p>
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<div class="admonitionblock note">
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<td class="icon">
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<td class="content">
Certificates <strong>must</strong> be configured when using the authentication mode
<code>NNG_TLS_AUTH_MODE_REQUIRED</code>.
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<td class="content">
This function may be called multiple times, to add additional chains
to a configuration, without affecting those added previously.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_return_values">RETURN VALUES</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This function returns 0 on success, and non-zero otherwise.</p>
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<div class="sect1">
<h2 id="_errors">ERRORS</h2>
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<div class="hdlist">
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<td class="hdlist1">
<code>NNG_ENOMEM</code>
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<p>Insufficient memory is available.</p>
</td>
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<td class="hdlist1">
<code>NNG_EBUSY</code>
</td>
<td class="hdlist2">
<p>The configuration <em>cfg</em> is already in use, and cannot be modified.</p>
</td>
</tr>
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<td class="hdlist1">
<code>NNG_EINVAL</code>
</td>
<td class="hdlist2">
<p>The contents of <em>path</em> are invalid or do not contain a valid PEM certificate.</p>
</td>
</tr>
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<td class="hdlist1">
<code>NNG_ENOENT</code>
</td>
<td class="hdlist2">
<p>The file <em>path</em> does not exist.</p>
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<td class="hdlist1">
<code>NNG_EPERM</code>
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<td class="hdlist2">
<p>The file <em>path</em> is not readable.</p>
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<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph text-left">
<p><a href="nng_strerror.3.html">nng_strerror(3)</a>,
<a href="nng_tls_config_alloc.3tls.html">nng_tls_config_alloc(3tls)</a>,
<a href="nng_tls_config_auth_mode.3tls.html">nng_tls_config_auth_mode(3tls)</a>,
<a href="nng_tls_config_ca_chain.3tls.html">nng_tls_config_ca_chain(3tls)</a>,
<a href="nng.7.html">nng(7)</a></p>
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