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<h1>22. Virtuoso Functions Guide - smime_verify</h1>
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<a href="fn_mime_body.html">mime_body</a>
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<h2>smime_verify</h2>
<div class="refpurpose">Verifies signature of signed MIME message</div>
<div class="funcsynopsis">
<span class="funcdef">varchar <span class="function">smime_verify</span>
</span>
(<span class="paramdef">in <span class="parameter">msg_text</span> varchar</span>,
<span class="paramdef">in <span class="parameter">certs</span> any</span>,
<span class="paramdefoptional">[out <span class="optional">signer_certs</span> any]</span>,
<span class="paramdefoptional">[in <span class="optional">flags</span> integer]</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>
This function takes the RFC822 text of an e-mail containing an S/MIME signed
message and verifies it's signature using the CA certificates in certs, which
is an array of strings containing single or multiple PEM-encoded certificates.
</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">
<span class="refsect2title">msg_text – </span>
The text of the message</div>
<div class="refsect2">
<span class="refsect2title">certs – </span>
array of strings containing CA certificates</div>
<div class="refsect2">
<span class="refsect2title">signer_certs – </span>
for receipt of PEM encoded certificates</div>
<div class="refsect2">
<span class="refsect2title">flags – </span>
A bitmask. See table below for valid mask values. Default is 0.
<table class="data">
<caption>Table: 22.1. Bit values for flags</caption>
<tr>
<th class="data">Mask</th>
<th class="data">Name</th>
<th class="data">Description</th>
</tr>
<tr>
<td class="data">0x1</td>
<td class="data">PKCS7_TEXT</td>
<td class="data">strip the text/plain content type header (if present).
If no such header generate an error.</td>
</tr>
<tr>
<td class="data">0x4</td>
<td class="data">PKCS7_NOSIGS</td>
<td class="data">don't verify the signatures</td>
</tr>
<tr>
<td class="data">0x8</td>
<td class="data">PKCS7_NOCHAIN</td>
<td class="data">don't descend into the signer's certificate chain when verifying</td>
</tr>
<tr>
<td class="data">0x10</td>
<td class="data">PKCS7_NOINTERN</td>
<td class="data">return only non-internal certificates in signer_certs</td>
</tr>
<tr>
<td class="data">0x20</td>
<td class="data">PKCS7_NOVERIFY</td>
<td class="data">don't verify the signer's certificates</td>
</tr>
</table>
<br />
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Return Types</div>
<p>If the signer_certs is supplied, an array of PEM encoded certificates
of the signers is returned.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_smime_verify" />
<div class="example">
<div class="exampletitle">Verifying a Signed MIME Message</div>
<p>Example (where signed.eml contains the output from smime_sign.</p>
<div>
<pre class="programlisting">
select smime_verify (file_to_string ('signed.eml'),
vector (file_to_string ('thwate_ca.pem')), NULL, 1)
_______________________________________________________________________________
just a test
_______________________________________________________________________________
</pre>
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<div class="refsect1">
<div class="refsect1title">See Also</div>
<p>
<a href="fn_smime_sign.html">smime_sign</a>
</p>
<p>
<a href="fn_smime_encrypt.html">smime_encrypt</a>
</p>
<p>
<a href="fn_smime_decrypt.html">smime_decrypt</a>
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<a href="fn_pem_certificates_to_array.html">pem_certificates_to_array</a>
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