Funcții Mcrypt
PHP Manual

mcrypt_encrypt

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_encryptEncrypts plaintext with given parameters

Descrierea

string mcrypt_encrypt ( string $cipher , string $key , string $data , string $mode [, string $iv ] )

Encrypts the data and returns it.

Parametri

cipher

One of the MCRYPT_ciphername constants of the name of the algorithm as string.

key

The key with which the data will be encrypted. If it's smaller that the required keysize, it is padded with '\0'. It is better not to use ASCII strings for keys.

It is recommended to use the mhash functions to create a key from a string.

data

The data that will be encrypted with the given cipher and mode. If the size of the data is not n * blocksize, the data will be padded with '\0'.

The returned crypttext can be larger that the size of the data that is given by data.

mode

One of the MCRYPT_MODE_modename constants of one of "ecb", "cbc", "cfb", "ofb", "nofb" or "stream".

iv

Used for the initialisation in CBC, CFB, OFB modes, and in some algorithms in STREAM mode. If you do not supply an IV, while it is needed for an algorithm, the function issues a warning and uses an IV with all bytes set to '\0'.

Valorile întoarse

Returns the encrypted data, as a string.

Exemple

Example #1 mcrypt_encrypt() Example

<?php
    $iv_size 
mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256MCRYPT_MODE_ECB);
    
$iv mcrypt_create_iv($iv_sizeMCRYPT_RAND);
    
$key "This is a very secret key";
    
$text "Meet me at 11 o'clock behind the monument.";
    echo 
strlen($text) . "\n";

    
$crypttext mcrypt_encrypt(MCRYPT_RIJNDAEL_256$key$textMCRYPT_MODE_ECB$iv);
    echo 
strlen($crypttext) . "\n";
?>

Exemplul de mai sus va afișa:

42
64

See also mcrypt_module_open() for a more advanced API and an example.


Funcții Mcrypt
PHP Manual