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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.openssl-public-encrypt" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>openssl_public_encrypt</refname>
<refpurpose>Encrypts data with public key</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>openssl_public_encrypt</methodname>
<methodparam><modifier role="attribute">#[\SensitiveParameter]</modifier><type>string</type><parameter>data</parameter></methodparam>
<methodparam><type>string</type><parameter role="reference">encrypted_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_encrypt</function> encrypts <parameter>data</parameter>
with public <parameter>public_key</parameter> and stores the result into
<parameter>encrypted_data</parameter>. Encrypted data can be decrypted via
<function>openssl_private_decrypt</function>.
</para>
<para>
This function can be used e.g. to encrypt message which can be then read
only by owner of the private key. It can be also used to store secure data
in database.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>encrypted_data</parameter></term>
<listitem>
<para>
This will hold the result of the encryption.
</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 will be used to decrypt 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_SSLV23_PADDING</constant>,
<constant>OPENSSL_PKCS1_OAEP_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>
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