cybercash_decr
    (PHP 4  <= 4.2.3)
cybercash_decr -- Cybercash decrypt
Description
array 
cybercash_decr ( string wmk, string sk, string inbuff)
     The function returns an associative array with the elements
     "errcode" and, if "errcode" is FALSE, "outbuff" (string),
     "outLth" (long) and "macbuff" (string).