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<?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@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <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> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/pkcs7.h></pre> <pre> int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData structure. <strong>pkey</strong> is the private key of the recipient, <strong>cert</strong> is the recipients certificate, <strong>data</strong> is a BIO to write the content to and <strong>flags</strong> is an optional set of flags.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></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 <strong>flags</strong> parameter.</p> <p>If the <strong>PKCS7_TEXT</strong> flag is set MIME headers for type <strong>text/plain</strong> are deleted from the content. If the content is not of type <strong>text/plain</strong> then an error is returned.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>PKCS7_decrypt() returns either 1 for success or 0 for failure. The error can be obtained from <code>ERR_get_error(3)</code></p> <p> </p> <hr /> <h1><a name="bugs">BUGS</a></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> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>ERR_get_error(3)</em>, <em>PKCS7_encrypt(3)</em></p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). 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>