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.
This link talks about how any light source that contains mass is technically able to have a shadow when certain criteria are met. All that is needed to create a shadow is to block or redirect light.
So technically the answer would be yes assuming that a lightsaber blade or blaster bolt is more than just a source of light but actually plasma or some other form of matter undergoing a reaction. But 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 lightsaber blade and a blaster bolt. So 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.
