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  <refentry id="function.ssh2-auth-pubkey-file">
   <refnamediv>
    <refname>ssh2_auth_pubkey_file</refname>
    <refpurpose>
     Authenticate using a public key
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>bool</type><methodname>ssh2_auth_pubkey_file</methodname>
     <methodparam><type>resource</type><parameter>session</parameter></methodparam>
     <methodparam><type>string</type><parameter>username</parameter></methodparam>
     <methodparam><type>string</type><parameter>pubkeyfile</parameter></methodparam>
     <methodparam><type>string</type><parameter>privkeyfile</parameter></methodparam>
     <methodparam choice="opt"><type>string</type><parameter>passphrase</parameter></methodparam>
    </methodsynopsis>

    <simpara>
     Authenticate using a public key read from a file.  If <parameter>privkeyfile</parameter>
     is encrypted (which it should be), the passphrase must be provided.
    </simpara>

    <example>
     <title>Authentication using a public key</title>
     <programlisting role="php">
<![CDATA[
<?php
$connection = ssh2_connect('shell.example.com', 22, array('hostkey'=>'ssh-rsa'));

if (ssh2_auth_pubkey_file($connection, 'username',
                          '/home/username/.ssh/id_rsa.pub',
                          '/home/username/.ssh/id_rsa', 'secret')) {
  echo "Public Key Authentication Successful\n";
} else {
  die('Public Key Authentication Failed');
}
?>
]]>
     </programlisting>
    </example>

   </refsect1>
  </refentry>

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