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<title>X509_EXTENSION_set_object</title>
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<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="#see_also">SEE ALSO</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
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<h1><a name="name">NAME</a></h1>
<p>X509_EXTENSION_set_object, X509_EXTENSION_set_critical,
X509_EXTENSION_set_data, X509_EXTENSION_create_by_NID,
X509_EXTENSION_create_by_OBJ, X509_EXTENSION_get_object,
X509_EXTENSION_get_critical, X509_EXTENSION_get_data - extension utility
functions</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
int X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj);
int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit);
int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data);</pre>
<pre>
X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
int nid, int crit,
ASN1_OCTET_STRING *data);
X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
const ASN1_OBJECT *obj, int crit,
ASN1_OCTET_STRING *data);</pre>
<pre>
ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex);
int X509_EXTENSION_get_critical(const X509_EXTENSION *ex);
ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ne);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>X509_EXTENSION_set_object() sets the extension type of <strong>ex</strong> to <strong>obj</strong>. The
<strong>obj</strong> pointer is duplicated internally so <strong>obj</strong> should be freed up after use.</p>
<p>X509_EXTENSION_set_critical() sets the criticality of <strong>ex</strong> to <strong>crit</strong>. If
<strong>crit</strong> is zero the extension in non-critical otherwise it is critical.</p>
<p>X509_EXTENSION_set_data() sets the data in extension <strong>ex</strong> to <strong>data</strong>. The
<strong>data</strong> pointer is duplicated internally.</p>
<p>X509_EXTENSION_create_by_NID() creates an extension of type <strong>nid</strong>,
criticality <strong>crit</strong> using data <strong>data</strong>. The created extension is returned and
written to <strong>*ex</strong> reusing or allocating a new extension if necessary so <strong>*ex</strong>
should either be <strong>NULL</strong> or a valid <strong>X509_EXTENSION</strong> structure it must
<strong>not</strong> be an uninitialised pointer.</p>
<p>X509_EXTENSION_create_by_OBJ() is identical to X509_EXTENSION_create_by_NID()
except it creates and extension using <strong>obj</strong> instead of a NID.</p>
<p>X509_EXTENSION_get_object() returns the extension type of <strong>ex</strong> as an
<strong>ASN1_OBJECT</strong> pointer. The returned pointer is an internal value which must
not be freed up.</p>
<p>X509_EXTENSION_get_critical() returns the criticality of extension <strong>ex</strong> it
returns <strong>1</strong> for critical and <strong>0</strong> for non-critical.</p>
<p>X509_EXTENSION_get_data() returns the data of extension <strong>ex</strong>. The returned
pointer is an internal value which must not be freed up.</p>
<p>
</p>
<hr />
<h1><a name="notes">NOTES</a></h1>
<p>These functions manipulate the contents of an extension directly. Most
applications will want to parse or encode and add an extension: they should
use the extension encode and decode functions instead such as
X509_add1_ext_i2d() and X509_get_ext_d2i().</p>
<p>The <strong>data</strong> associated with an extension is the extension encoding in an
<strong>ASN1_OCTET_STRING</strong> structure.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p>X509_EXTENSION_set_object() X509_EXTENSION_set_critical() and
X509_EXTENSION_set_data() return <strong>1</strong> for success and <strong>0</strong> for failure.</p>
<p>X509_EXTENSION_create_by_NID() and X509_EXTENSION_create_by_OBJ() return
an <strong>X509_EXTENSION</strong> pointer or <strong>NULL</strong> if an error occurs.</p>
<p>X509_EXTENSION_get_object() returns an <strong>ASN1_OBJECT</strong> pointer.</p>
<p>X509_EXTENSION_get_critical() returns <strong>0</strong> for non-critical and <strong>1</strong> for
critical.</p>
<p>X509_EXTENSION_get_data() returns an <strong>ASN1_OCTET_STRING</strong> pointer.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>X509V3_get_d2i(3)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2015-2016 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>
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