What are the easiest brute force algorithms for solving closest and shortest vector problems?
I want to find an arbitrary, but small ($\lesssim 20$) number of lattice vectors closest to a given point. Since I consider low spatial dimension of four or less, the hardness of the closest vector problem is not an important issue for me. On the other hand, I want guaranteed solutions, so no approximations. Is the easiest way to use the standard lattice reductions, such as the LLL algorithm?