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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@336782 c90b9560-bf6c-de11-be94-00142212c4b1
61 lines
2.1 KiB
XML
61 lines
2.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<appendix xml:id="mcrypt.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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&reftitle.examples;
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<para>
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Mcrypt can be used to encrypt and decrypt using the above
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mentioned ciphers. If you linked against <literal>libmcrypt-2.2.x</literal>, the
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four important mcrypt commands (<function>mcrypt_cfb</function>,
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<function>mcrypt_cbc</function>, <function>mcrypt_ecb</function>,
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and <function>mcrypt_ofb</function>) can operate in both modes
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which are named <constant>MCRYPT_ENCRYPT</constant> and
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<constant>MCRYPT_DECRYPT</constant>, respectively.
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</para>
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<para>
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If you linked against libmcrypt 2.4.x or 2.5.x, these functions are still
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available, but it is recommended that you use the advanced functions.
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<example>
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<title>Encrypt an input value with <literal>AES</literal> with a 256-bit key under 2.4.x and higher in <literal>CBC</literal> mode</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$key = hash('sha256', 'this is a secret key', true);
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$input = "Let us meet at 9 o'clock at the secret place.";
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$td = mcrypt_module_open('rijndael-128', '', 'cbc', '');
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$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_DEV_URANDOM);
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mcrypt_generic_init($td, $key, $iv);
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$encrypted_data = mcrypt_generic($td, $input);
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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?>
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]]>
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</programlisting>
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</example>
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This example will give you the encrypted data as a string in
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<literal>$encrypted_data</literal>. For a full example see
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<function>mcrypt_module_open</function>.
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</para>
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</appendix>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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