mcrypt_module_open

    (PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

    mcrypt_module_open — Opens the module of the algorithm and the mode to be used

    Advertencia

    Esta función ha sido declarada OBSOLETA a partir de PHP 7.1.0 y será ELIMINADA a partir de PHP 7.2.0. Su uso está totalmente desaconsejado.

    Descripción

    mcrypt_module_open(
        string$algorithm,
        string$algorithm_directory,
        string$mode,
        string$mode_directory
    ): resource

    This function opens the module of the algorithm and the mode to be used. The name of the algorithm is specified in algorithm, e.g. "twofish" or is one of the MCRYPT_ciphername constants. The module is closed by calling mcrypt_module_close().

    Parámetros

    algorithm

    Una de las constantes MCRYPT_nombredelcifrado, o el nombre del algoritmo como string.

    algorithm_directory

    The algorithm_directory parameter is used to locate the encryption module. When you supply a directory name, it is used. When you set it to an empty string (""), the value set by the mcrypt.algorithms_dirphp.ini directive is used. When it is not set, the default directory that is used is the one that was compiled into libmcrypt (usually /usr/local/lib/libmcrypt).

    mode

    Una de las constantes MCRYPT_MODE_nombredelmodo, o una de las siguientes strings: "ecb", "cbc", "cfb", "ofb", "nofb" o "stream".

    mode_directory

    The mode_directory parameter is used to locate the encryption module. When you supply a directory name, it is used. When you set it to an empty string (""), the value set by the mcrypt.modes_dirphp.ini directive is used. When it is not set, the default directory that is used is the one that was compiled-in into libmcrypt (usually /usr/local/lib/libmcrypt).

    Valores devueltos

    Normally it returns an encryption descriptor, or false on error.

    Ejemplos

    Ejemplo #1 mcrypt_module_open() Examples

    <?php
    $td     = mcrypt_module_open(MCRYPT_DES, '',
    MCRYPT_MODE_ECB, '/usr/lib/mcrypt-modes');

    $td = mcrypt_module_open('rijndael-256', '', 'ofb', '');
    ?>

    The first line in the example above will try to open the DES cipher from the default directory and the ECB mode from the directory /usr/lib/mcrypt-modes. The second example uses strings as name for the cipher and mode, this only works when the extension is linked against libmcrypt 2.4.x or 2.5.x.

    Ejemplo #2 Using mcrypt_module_open() in encryption

    <?php

    $td = mcrypt_module_open('rijndael-256', '', 'ofb', '');


    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_DEV_RANDOM);
    $ks = mcrypt_enc_get_key_size($td);


    $key = substr(md5('very secret key'), 0, $ks);


    mcrypt_generic_init($td, $key, $iv);


    $encrypted = mcrypt_generic($td, 'This is very important data');


    mcrypt_generic_deinit($td);


    mcrypt_generic_init($td, $key, $iv);


    $decrypted = mdecrypt_generic($td, $encrypted);


    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);


    echo trim($decrypted) . "\n";
    ?>

    Ver también

    To Top