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
Diese Funktion wurde in PHP 7.1.0 als DEPRECATED (veraltet) markiert und ist seit PHP 7.2.0 ENTFERNT. Von der Verwendung dieser Funktion wird dringend abgeraten.
Beschreibung
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().
Parameter-Liste
-
algorithm -
Eine der Konstanten von
MCRYPT_ciphernameoder der Name eines Algorithmus als Zeichenkette. -
algorithm_directory -
The
algorithm_directoryparameter 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 themcrypt.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 -
Eine der Konstanten von
MCRYPT_MODE_modenameoder eine der folgenden Zeichenketten: "ecb", "cbc", "cfb", "ofb", "nofb" oder "stream". -
mode_directory -
The
mode_directoryparameter 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 themcrypt.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).
Rückgabewerte
Normally it returns an encryption descriptor, or false on error.
Beispiele
Beispiel #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.
Beispiel #2 Using mcrypt_module_open() in encryption
<?php
/* Open the cipher */
$td = mcrypt_module_open('rijndael-256', '', 'ofb', '');
/* Create the IV and determine the keysize length, use MCRYPT_RAND
* on Windows instead */
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_DEV_RANDOM);
$ks = mcrypt_enc_get_key_size($td);
/* Create key */
$key = substr(md5('very secret key'), 0, $ks);
/* Intialize encryption */
mcrypt_generic_init($td, $key, $iv);
/* Encrypt data */
$encrypted = mcrypt_generic($td, 'This is very important data');
/* Terminate encryption handler */
mcrypt_generic_deinit($td);
/* Initialize encryption module for decryption */
mcrypt_generic_init($td, $key, $iv);
/* Decrypt encrypted string */
$decrypted = mdecrypt_generic($td, $encrypted);
/* Terminate decryption handle and close module */
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
/* Show string */
echo trim($decrypted) . "\n";
?>
Siehe auch
- mcrypt_module_close() - Closes the mcrypt module
- mcrypt_generic() - This function encrypts data
- mdecrypt_generic() - Decrypts data
- mcrypt_generic_init() - This function initializes all buffers needed for encryption
- mcrypt_generic_deinit() - This function deinitializes an encryption module
