<?php
/* Data */
$key = 'this is a very long key, even too long for the cipher';
$plain_text = 'very important data';
/* Open module, and create IV */
$td = mcrypt_module_open ('des', '', 'ecb', '');
$key = substr ($key, 0, mcrypt_enc_get_key_size ($td));
$iv_size = mcrypt_enc_get_iv_size ($td);
$iv = mcrypt_create_iv ($iv_size, MCRYPT_RAND);
/* Initialize encryption handle */
if (mcrypt_generic_init ($td, $key, $iv) != -1) {
/* Encrypt data */
$c_t = mcrypt_generic ($td, $plain_text);
mcrypt_generic_deinit ($td);
/* Reinitialize buffers for decryption */
mcrypt_generic_init ($td, $key, $iv);
$p_t = mdecrypt_generic ($td, $c_t);
/* Clean up */
mcrypt_generic_deinit ($td);
mcrypt_module_close ($td);
}
if (strncmp ($p_t, $plain_text, strlen($plain_text)) == 0) {
echo "ok\n";
} else {
echo "error\n";
}
?> |
