mcrypt decryption

[U_nix]

Hello,

how long would it take to crack this if you know nothing about the function?

Code:

encryptthis($texttoenc."SaL7y");

Code:

function encryptthis($string){
$cryptkey="Mas73rK3y2012";
$crypt = mcrypt_create_iv (mcrypt_get_iv_size (MCRYPT_BLOWFISH, MCRYPT_MODE_ECB), MCRYPT_RAND);
$add_crypt = mcrypt_encrypt (MCRYPT_BLOWFISH, $cryptkey, $string, MCRYPT_MODE_ECB, $crypt);
return(base64_encode($add_crypt));
}