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<title>CMS_digest_create</title>
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<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="#RETURN-VALUES">RETURN VALUES</a></li>
<li><a href="#SEE-ALSO">SEE ALSO</a></li>
<li><a href="#HISTORY">HISTORY</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>CMS_digest_create_ex, CMS_digest_create - Create CMS DigestedData object</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include <openssl/cms.h>
CMS_ContentInfo *CMS_digest_create_ex(BIO *in, const EVP_MD *md,
unsigned int flags, OSSL_LIB_CTX *ctx,
const char *propq);
CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
unsigned int flags);</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>CMS_digest_create_ex() creates a <b>CMS_ContentInfo</b> structure with a type <b>NID_pkcs7_digest</b>. The data supplied via the <i>in</i> BIO is digested using <i>md</i>. The library context <i>libctx</i> and the property query <i>propq</i> are used when retrieving algorithms from providers. The <i>flags</i> field supports the <b>CMS_DETACHED</b> and <b>CMS_STREAM</b> flags, Internally CMS_final() is called unless <b>CMS_STREAM</b> is specified.</p>
<p>The <b>CMS_ContentInfo</b> structure can be freed using <a href="../man3/CMS_ContentInfo_free.html">CMS_ContentInfo_free(3)</a>.</p>
<p>CMS_digest_create() is similar to CMS_digest_create_ex() but uses default values of NULL for the library context <i>libctx</i> and the property query <i>propq</i>.</p>
<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>If the allocation fails, CMS_digest_create_ex() and CMS_digest_create() return NULL and set an error code that can be obtained by <a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>. Otherwise they return a pointer to the newly allocated structure.</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_final.html">CMS_final(3)</a>></p>
<h1 id="HISTORY">HISTORY</h1>
<p>The CMS_digest_create_ex() method was added in OpenSSL 3.0.</p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the Apache License 2.0 (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>
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