php-doc-en/reference/openssl/functions/openssl-public-encrypt.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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  <refentry id="function.openssl-public-encrypt">
   <refnamediv>
    <refname>openssl_public_encrypt</refname>
    <refpurpose>Encrypts data with public key </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>bool</type><methodname>openssl_public_encrypt</methodname>
      <methodparam><type>string</type><parameter>data</parameter></methodparam>
      <methodparam><type>string</type><parameter>&amp;crypted</parameter></methodparam>
      <methodparam><type>mixed</type><parameter>key</parameter></methodparam>
      <methodparam choice="opt"><type>int</type><parameter>padding</parameter></methodparam>
     </methodsynopsis>
     &warn.experimental.func;
    <para>
     <function>openssl_public_encrypt</function> encrypts <parameter>data</parameter>
     with public <parameter>key</parameter> and stores the result into
     <parameter>crypted</parameter>. Encrypted data can be decrypted via
     <methodname>openssl_private_decrypt</methodname>. <parameter>padding</parameter>
     defaults to OPENSSL_PKCS1_PADDING, but can also be one of
     OPENSSL_SSLV23_PADDING, OPENSSL_PKCS1_OAEP_PADDING,
     OPENSSL_NO_PADDING.
    </para>
    <para>
     &return.success;
    </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>
    <para>
     See also <function>openssl_private_decrypt</function> and
     <function>openssl_private_encrypt</function>.
    </para>
   </refsect1>
  </refentry>

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