<?xml version="1.0" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>PKCS7_decrypt</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<link rev="made" href="mailto:root" />
</head>

<body>



<ul id="index">
  <li><a href="#NAME">NAME</a></li>
  <li><a href="#SYNOPSIS">SYNOPSIS</a></li>
  <li><a href="#DESCRIPTION">DESCRIPTION</a></li>
  <li><a href="#NOTES">NOTES</a></li>
  <li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
  <li><a href="#BUGS">BUGS</a></li>
  <li><a href="#SEE-ALSO">SEE ALSO</a></li>
  <li><a href="#COPYRIGHT">COPYRIGHT</a></li>
</ul>

<h1 id="NAME">NAME</h1>

<p>PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code>#include &lt;openssl/pkcs7.h&gt;

int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData structure. <b>pkey</b> is the private key of the recipient, <b>cert</b> is the recipients certificate, <b>data</b> is a BIO to write the content to and <b>flags</b> is an optional set of flags.</p>

<h1 id="NOTES">NOTES</h1>

<p>Although the recipients certificate is not needed to decrypt the data it is needed to locate the appropriate (of possible several) recipients in the PKCS#7 structure.</p>

<p>The following flags can be passed in the <b>flags</b> parameter.</p>

<p>If the <b>PKCS7_TEXT</b> flag is set MIME headers for type <b>text/plain</b> are deleted from the content. If the content is not of type <b>text/plain</b> then an error is returned.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>PKCS7_decrypt() returns either 1 for success or 0 for failure. The error can be obtained from ERR_get_error(3)</p>

<h1 id="BUGS">BUGS</h1>

<p>PKCS7_decrypt() must be passed the correct recipient key and certificate. It would be better if it could look up the correct key and certificate from a database.</p>

<p>The lack of single pass processing and need to hold all data in memory as mentioned in PKCS7_sign() also applies to PKCS7_verify().</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/PKCS7_encrypt.html">PKCS7_encrypt(3)</a></p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the Apache License 2.0 (the &quot;License&quot;). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>


</body>

</html>


