php-doc-en/reference/openssl/functions/openssl-pkey-new.xml
2021-01-13 14:01:18 +01:00

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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.openssl-pkey-new">
<refnamediv>
<refname>openssl_pkey_new</refname>
<refpurpose>Generates a new private key </refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>openssl_pkey_new</methodname>
<methodparam choice="opt"><type>array</type><parameter>configargs</parameter></methodparam>
</methodsynopsis>
<para>
<function>openssl_pkey_new</function> generates a new private
key.
How to obtain the public component of the key is shown in an example below.
</para>
&note.openssl.cnf;
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>configargs</parameter></term>
<listitem>
<para>
You can finetune the key generation (such as specifying the number of
bits) using <parameter>configargs</parameter>. See
<function>openssl_csr_new</function> for more information about
<parameter>configargs</parameter>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns a resource identifier for the pkey 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>7.1.0</entry>
<entry>The <parameter>curve_name</parameter> configarg was added to make it possible to create EC keys.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example xml:id="function.openssl-pkey-new.example.public-key">
<title>Obtain the public key from a private key</title>
<programlisting role="php">
<![CDATA[
<?php
$private_key = openssl_pkey_new();
$public_key_pem = openssl_pkey_get_details($private_key)['key'];
echo $public_key_pem;
$public_key = openssl_pkey_get_public($public_key_pem);
var_dump($public_key);
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArZFsmN2P6rx1Xt7YV95o
gcdlal0k3ryiIhFNzjwtRNNTXfEfBr6lUuaIJYQ8/XqEBX0hpcfuuF6tTRlonA3t
WLME0QFD93YVsAaXcy76YqjjqcRRodIBphAbYyyMI/lXkQAdn7kbAmr7neSOsMYJ
El9Wo4Hl4oG6e52ZnYHyqW9dxh4hX93eupR2TmcCdVf+r9xoHewP0KJYSHt7vDUX
AQlWYcQiWHIadFsmL0orr6mutlXFReoHbesgKY9/3YLOu0JfxflSjIZ2JeL1NTl1
MsmODsUwgAUrwnWKKx+eQUP5g3GnSB3dPkRh9zRVRiLNWbCugyjrf3e6DgQWrW7j
pwIDAQAB
-----END PUBLIC KEY-----
resource(5) of type (OpenSSL key)
]]>
</screen>
</example>
</refsect1>
</refentry>
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