A self-consistent magnetopause--boundary layer model is constructed which contains two current layers, one for the magnetopause and one for the magnetosphere--boundary layer transition region. Field-aligned sheet currents in the boundary layer are generated by the plasma flow along the boundary layer. The magnitude of these boundary layer field-aligned currents is about 10-8 A/m2, which can be scaled along field lines to about 5¿10-6 A/m2 near the ionosphere and therefore can be identified as a possible source for the auroral sheet currents. The cross-field current density in the model is also about 10-8 A/m2, which is sufficient to excite the lower-hybrid-drift waves to produce the observed electromagnetic fluctuations in the magnetopause--boundary layer region.