(PHP4 >= 4.0.2)
mdecrypt_generic -- This function decrypts data
Description
string mdecrypt_generic (resource td, string data)
This function decrypts data. Note that the length of the
returned string can in fact be longer then the unencrypted
string, due to the padding of the data.
Example 1. Mdecrypt_generic() Example
<?php
$iv_size = mcrypt_enc_get_iv_size ($td));
$iv = @mcrypt_create_iv ($iv_size, MCRYPT_RAND);
if (@mcrypt_generic_init ($td, $key, $iv) != -1)
{
$c_t = mcrypt_generic ($td, $plain_text);
@mcrypt_generic_init ($td, $key, $iv);
$p_t = mdecrypt_generic ($td, $c_t);
}
if (strncmp ($p_t, $plain_text, strlen($plain_text)) == 0)
echo "ok";
else
echo "error";
?>
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The above example shows how to check if the data before the
encryption is the same as the data after the decryption.