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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<!-- splitted from ./en/functions/openssl.xml, last change in rev 1.19 -->
<refentry id="function.openssl-private-encrypt">
<refnamediv>
<refname>openssl_private_encrypt</refname>
<refpurpose>Encrypts data with private key </refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>openssl_private_encrypt</methodname>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
<methodparam><type>string</type><parameter role="reference">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_private_encrypt</function> encrypts <parameter>data</parameter>
with private <parameter>key</parameter> and stores the result into
<parameter>crypted</parameter>. Encrypted data can be decrypted via
<function>openssl_public_decrypt</function>. <parameter>padding</parameter>
defaults to <constant>OPENSSL_PKCS1_PADDING</constant>, but can also be
<constant>OPENSSL_NO_PADDING</constant>.
</para>
<para>
&return.success;
</para>
<para>
This function can be used e.g. to sign data (or its hash) to prove that it
is not written by someone else.
</para>
<para>
See also <function>openssl_public_decrypt</function> and
<function>openssl_public_encrypt</function>.
</para>
</refsect1>
</refentry>
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