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openssl-pkey-get-public.xml
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openssl-pkey-get-public.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.openssl-pkey-get-public" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>openssl_pkey_get_public</refname>
<refpurpose>Extract public key from certificate and prepare it for use</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>OpenSSLAsymmetricKey</type><type>false</type></type><methodname>openssl_pkey_get_public</methodname>
<methodparam><type class="union"><type>OpenSSLAsymmetricKey</type><type>OpenSSLCertificate</type><type>array</type><type>string</type></type><parameter>public_key</parameter></methodparam>
</methodsynopsis>
<para>
<function>openssl_pkey_get_public</function> extracts the public key from
<parameter>public_key</parameter> and prepares it for use by other
functions.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>public_key</parameter></term>
<listitem>
<para>
<parameter>public_key</parameter> can be one of the following:
<orderedlist>
<listitem><simpara>an <classname>OpenSSLAsymmetricKey</classname> instance</simpara></listitem>
<listitem><simpara>a string having the format
<filename>file://path/to/file.pem</filename>. The named file must
contain a <acronym>PEM</acronym> encoded certificate/public key (it may contain both).
</simpara>
</listitem>
<listitem><simpara>A <acronym>PEM</acronym> formatted public key.</simpara></listitem>
</orderedlist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an <classname>OpenSSLAsymmetricKey</classname> instance on success, or &false; on error.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
On success, this function returns an <classname>OpenSSLAsymmetricKey</classname> instance now;
previously, a &resource; of type <literal>OpenSSL key</literal> was returned.
</entry>
</row>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>public_key</parameter> accepts an <classname>OpenSSLAsymmetricKey</classname>
or <classname>OpenSSLCertificate</classname> instance now;
previously, a &resource; of type <literal>OpenSSL key</literal> or <literal>OpenSSL X.509</literal>
was accepted.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
</refentry>
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