def list4ToBitList32(lst):
    """Convert a 4-byte list into a 32-bit list"""
    def intToBitList2(number,length):
        """Convert an integer into a bit list
        with specified length"""
        return [(number>>n) & 1
                for n in reversed(range(length))]    
     
    lst2 = []
    for e in lst:
        lst2 += intToBitList2(e,8)
    return list([0]*(32-len(lst2)))+lst2