There would be many factors involved. Mainly the intensity of secondary light source that is hitting the blaster bolt or blade, distance to surface that a potential shadow would be cast upon, the direction of travel from the light source (is it focused in one direction or being cast out in all directions), as well as the frequency of the light from the source, the blade, and/or the blaster bolt.
thisThis link talks about how any light source that contains mass is technically able to have a shadow when certain criteria are met. allAll that is needed to create a shadow is to block or redirect light.
So yes technically the answer would be yes assuming that a light saberlightsaber blade or blaster bolt is more than just a source of light but actually plasma or some other form of matter undergoing a reationreaction. butBut to get further into an explanation of the exact requirements to cause this shadow, one would have to make assumptions about the intensity and frequency of both a light saberlightsaber blade and a blaster bolt. soSo the answer is absolutely that yes, they would in the right situation cast a shadow. but attempting to determine that right situation is not scientifically possible without an actual real world example.