  One of the salient signatures of Majorana zero modes and topological
superconductivity is a $4\pi$-periodic Josephson effect due to the combination
of fermion parity conservation and the presence of a topologically protected
odd number of zero energy crossings in the Andreev spectrum.
  In this paper, we study this effect in Josephson junctions composed of two
semiconducting nanowires with Rashba spin-orbit coupling and induced
superconductivity from the proximity effect. For certain orientations of the
external magnetic field, such junctions possess a chiral symmetry and we show
how this symmetry allows the Andreev spectrum and the protected crossings to be
shifted by introducing a relative angle between the two wires. The junction
then displays a geometrically induced anomalous Josephson effect, the flow of a
supercurrent in the absence of external phase bias. Furthermore, we derive a
proportionality relation between the local current density and the local
curvature for a single curved wire. This result can be viewed as a
one-dimensional analogue of the recently proposed geo-Josephson effect
[Kvorning et al., arXiv:1709.00482]. Our two proposed effects can in principle
be used as signatures of topological superconductivity in one dimension.
