openssl-pkey-get-public.xml

<?xml version="1.0" encoding="utf-8"?>
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<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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