/**
* Decrypt data originally returned from ::encrypt() using the two keys
* that were originially passed into the ::encrypt() method.
*
* Parameters:
* ciphertext - (string<binary>) Unencoded data returned from the
* ::encrypt() method
* key - (string) master key used for the encryption originally
* skey - (string_ sub key or namespace used originally for the
* encryption
*/
function decrypt($ciphertext, $key, $skey = 'encryption')
{
if (!$key || !$ciphertext || $ciphertext[0] != '$') {
return false;
}
list(, $crypt, $ciphertext) = explode('$', $ciphertext, 3);
//Get crypto.... based on crypt tag.
if (!$crypt || !($crypto = Crypto::get($crypt)) || !$crypto->exists()) {
return false;
}
$crypto->setKeys($key, $skey);
return $crypto->decrypt(base64_decode($ciphertext));
}
