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Mcrypt ciphers	Mcrypt Functions

	Last updated: Thu, 26 Jun 2008

Examples

Mcrypt can be used to encrypt and decrypt using the above mentioned ciphers. If you linked against libmcrypt-2.2.x, the four important mcrypt commands (mcrypt_cfb(), mcrypt_cbc(), mcrypt_ecb(), and mcrypt_ofb()) can operate in both modes which are named MCRYPT_ENCRYPT and MCRYPT_DECRYPT, respectively.

Example #1 Encrypt an input value with TripleDES under 2.2.x in ECB mode


<?php

$key = "this is a secret key";

$input = "Let us meet at 9 o'clock at the secret place.";



$encrypted_data = mcrypt_ecb (MCRYPT_3DES, $key, $input, MCRYPT_ENCRYPT);

?>

This example will give you the encrypted data as a string in $encrypted_data.

If you linked against libmcrypt 2.4.x or 2.5.x, these functions are still available, but it is recommended that you use the advanced functions.

Example #2 Encrypt an input value with TripleDES under 2.4.x and higher in ECB mode


<?php

    $key = "this is a secret key";

    $input = "Let us meet at 9 o'clock at the secret place.";



    $td = mcrypt_module_open('tripledes', '', 'ecb', '');

    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

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

    $encrypted_data = mcrypt_generic($td, $input);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);

?>

This example will give you the encrypted data as a string in $encrypted_data. For a full example see mcrypt_module_open().

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Mcrypt ciphers	Mcrypt Functions

	Last updated: Thu, 26 Jun 2008

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