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<h1 class="refname">openssl_spki_verify</h1>
<p class="verinfo">(PHP 5 >= 5.6.0, PHP 7)</p><p class="refpurpose"><span class="refname">openssl_spki_verify</span> — <span class="dc-title">Verifies a signed public key and challenge</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.openssl-spki-verify-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>openssl_spki_verify</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$spkac</code></span>
)</div>
<p class="para rdfs-comment">
Validates the supplied signed public key and challenge
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.openssl-spki-verify-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">spkac</code></dt>
<dd>
<p class="para">
Expects a valid signed public key and challenge
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.openssl-spki-verify-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a boolean on success or failure.
</p>
</div>
<div class="refsect1 errors" id="refsect1-function.openssl-spki-verify-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Emits an <strong><code>E_WARNING</code></strong> level error if an invalid argument
is passed via the <code class="parameter">spkac</code> parameter.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.openssl-spki-verify-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-987">
<p><strong>Example #1 <span class="function"><strong>openssl_spki_verify()</strong></span> example</strong></p>
<div class="example-contents"><p>
Validates an existing signed public key and challenge
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$pkey </span><span style="color: #007700">= </span><span style="color: #0000BB">openssl_pkey_new</span><span style="color: #007700">(</span><span style="color: #DD0000">'secret password'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$spkac </span><span style="color: #007700">= </span><span style="color: #0000BB">openssl_spki_new</span><span style="color: #007700">(</span><span style="color: #0000BB">$pkey</span><span style="color: #007700">, </span><span style="color: #DD0000">'challenge string'</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">openssl_spki_verify</span><span style="color: #007700">(</span><span style="color: #0000BB">preg_replace</span><span style="color: #007700">(</span><span style="color: #DD0000">'/SPKAC=/'</span><span style="color: #007700">, </span><span style="color: #DD0000">''</span><span style="color: #007700">, </span><span style="color: #0000BB">$spkac</span><span style="color: #007700">))) {<br /> echo </span><span style="color: #0000BB">$spkac</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"SPKAC validation failed"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<div class="example" id="example-988">
<p><strong>Example #2 <span class="function"><strong>openssl_spki_verify()</strong></span> example from <keygen></strong></p>
<div class="example-contents"><p>
Validates an existing signed public key and challenge issued from the <keygen> element
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">openssl_spki_verify</span><span style="color: #007700">(</span><span style="color: #0000BB">preg_replace</span><span style="color: #007700">(</span><span style="color: #DD0000">'/SPKAC=/'</span><span style="color: #007700">, </span><span style="color: #DD0000">''</span><span style="color: #007700">, </span><span style="color: #0000BB">$_POST</span><span style="color: #007700">[</span><span style="color: #DD0000">'spkac'</span><span style="color: #007700">]))) {<br /> echo </span><span style="color: #0000BB">$spkac</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"SPKAC validation failed"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?><br /></span><keygen name="spkac" challenge="challenge string" keytype="RSA"></span>
</code></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-function.openssl-spki-verify-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.openssl-spki-new.html" class="function" rel="rdfs-seeAlso">openssl_spki_new()</a> - Generate a new signed public key and challenge</span></li>
<li class="member"><span class="function"><a href="function.openssl-spki-export-challenge.html" class="function" rel="rdfs-seeAlso">openssl_spki_export_challenge()</a> - Exports the challenge assoicated with a signed public key and challenge</span></li>
<li class="member"><span class="function"><a href="function.openssl-spki-export.html" class="function" rel="rdfs-seeAlso">openssl_spki_export()</a> - Exports a valid PEM formatted public key signed public key and challenge</span></li>
<li class="member"><span class="function"><strong>openssl_md_method()</strong></span></li>
<li class="member"><span class="function"><a href="function.openssl-csr-new.html" class="function" rel="rdfs-seeAlso">openssl_csr_new()</a> - Generates a CSR</span></li>
<li class="member"><span class="function"><a href="function.openssl-csr-sign.html" class="function" rel="rdfs-seeAlso">openssl_csr_sign()</a> - Sign a CSR with another certificate (or itself) and generate a certificate</span></li>
</ul>
</p>
</div>
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