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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@306414 c90b9560-bf6c-de11-be94-00142212c4b1
107 lines
3.3 KiB
XML
107 lines
3.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.mcrypt-decrypt" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>mcrypt_decrypt</refname>
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<refpurpose>Decrypts crypttext with given parameters</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>string</type><methodname>mcrypt_decrypt</methodname>
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<methodparam><type>string</type><parameter>cipher</parameter></methodparam>
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<methodparam><type>string</type><parameter>key</parameter></methodparam>
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<methodparam><type>string</type><parameter>data</parameter></methodparam>
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<methodparam><type>string</type><parameter>mode</parameter></methodparam>
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<methodparam choice="opt"><type>string</type><parameter>iv</parameter></methodparam>
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</methodsynopsis>
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<para>
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Decrypts the <parameter>data</parameter> and returns the unencrypted data.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>cipher</parameter></term>
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<listitem>
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<para>
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One of the <constant>MCRYPT_ciphername</constant> constants,
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or the name of the algorithm as string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>key</parameter></term>
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<listitem>
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<para>
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The key with which the data was encrypted. If it's smaller
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than the required keysize, it is padded with
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'<literal>\0</literal>'.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>data</parameter></term>
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<listitem>
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<para>
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The data that will be decrypted with the given <parameter>cipher</parameter>
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and <parameter>mode</parameter>. If the size of the data is not n * blocksize,
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the data will be padded with '<literal>\0</literal>'.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>mode</parameter></term>
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<listitem>
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<para>
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One of the <constant>MCRYPT_MODE_modename</constant> constants,
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or one of the following strings: "ecb", "cbc", "cfb", "ofb",
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"nofb" or "stream".
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>iv</parameter></term>
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<listitem>
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<para>
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The <parameter>iv</parameter> parameter is used for the initialization
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in CBC, CFB, OFB modes, and in some algorithms in STREAM mode. If you
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do not supply an IV, while it is needed for an algorithm, the function
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issues a warning and uses an IV with all its bytes set to
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'<literal>\0</literal>'.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns the decrypted data as a string.
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</para>
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</refsect1>
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</refentry>
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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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