openssl-public-decrypt.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.openssl-public-decrypt" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>openssl_public_decrypt</refname>
  <refpurpose>Decrypts data with public key</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>openssl_public_decrypt</methodname>
   <methodparam><type>string</type><parameter>data</parameter></methodparam>
   <methodparam><modifier role="attribute">#[\SensitiveParameter]</modifier><type>string</type><parameter role="reference">decrypted_data</parameter></methodparam>
   <methodparam><type class="union"><type>OpenSSLAsymmetricKey</type><type>OpenSSLCertificate</type><type>array</type><type>string</type></type><parameter>public_key</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>padding</parameter><initializer><constant>OPENSSL_PKCS1_PADDING</constant></initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>openssl_public_decrypt</function> decrypts
   <parameter>data</parameter> that was previous encrypted via
   <function>openssl_private_encrypt</function> and stores the result into
   <parameter>decrypted_data</parameter>.  
  </para>
  <para>
   You can use this function e.g. to check if the message was written by the
   owner of the private key.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>data</parameter></term>
     <listitem>
      <para>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>decrypted_data</parameter></term>
     <listitem>
      <para>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>public_key</parameter></term>
     <listitem>
      <para>
       <parameter>public_key</parameter> must be the public key that corresponds
       to the private key that was used to encrypt the data.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>padding</parameter></term>
     <listitem>
      <para>
       <parameter>padding</parameter> can be one of
       <constant>OPENSSL_PKCS1_PADDING</constant>,
       <constant>OPENSSL_NO_PADDING</constant>.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </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>
       <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>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>openssl_private_encrypt</function></member>
    <member><function>openssl_private_decrypt</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->