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SMIME_read_CMS.html
<?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>SMIME_read_CMS</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </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="#BUGS">BUGS</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</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>SMIME_read_CMS - parse S/MIME message</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/cms.h> CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>SMIME_read_CMS() parses a message in S/MIME format.</p> <p><b>in</b> is a BIO to read the message from.</p> <p>If cleartext signing is used then the content is saved in a memory bio which is written to <b>*bcont</b>, otherwise <b>*bcont</b> is set to NULL.</p> <p>The parsed CMS_ContentInfo structure is returned or NULL if an error occurred.</p> <h1 id="NOTES">NOTES</h1> <p>If <b>*bcont</b> is not NULL then the message is clear text signed. <b>*bcont</b> can then be passed to CMS_verify() with the <b>CMS_DETACHED</b> flag set.</p> <p>Otherwise the type of the returned structure can be determined using CMS_get0_type().</p> <p>To support future functionality if <b>bcont</b> is not NULL <b>*bcont</b> should be initialized to NULL. For example:</p> <pre><code> BIO *cont = NULL; CMS_ContentInfo *cms; cms = SMIME_read_CMS(in, &cont);</code></pre> <h1 id="BUGS">BUGS</h1> <p>The MIME parser used by SMIME_read_CMS() is somewhat primitive. While it will handle most S/MIME messages more complex compound formats may not work.</p> <p>The parser assumes that the CMS_ContentInfo structure is always base64 encoded and will not handle the case where it is in binary format or uses quoted printable format.</p> <p>The use of a memory BIO to hold the signed content limits the size of message which can be processed due to memory restraints: a streaming single pass option should be available.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>SMIME_read_CMS() returns a valid <b>CMS_ContentInfo</b> structure or <b>NULL</b> if an error occurred. The error can be obtained from ERR_get_error(3).</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/CMS_type.html">CMS_type(3)</a>, <a href="../man3/SMIME_read_CMS.html">SMIME_read_CMS(3)</a>, <a href="../man3/CMS_sign.html">CMS_sign(3)</a>, <a href="../man3/CMS_verify.html">CMS_verify(3)</a>, <a href="../man3/CMS_encrypt.html">CMS_encrypt(3)</a>, <a href="../man3/CMS_decrypt.html">CMS_decrypt(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2008-2016 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>
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