'Dumps a signature to a byte string compatible with Microsoft\'s
BCryptVerifySignature() function.
:return:
A byte string compatible with BCryptVerifySignature()'

def to_p1363(self):

    r_bytes = int_to_bytes(self[u'r'].native)
    s_bytes = int_to_bytes(self[u's'].native)
    int_byte_length = max(len(r_bytes), len(s_bytes))
    r_bytes = fill_width(r_bytes, int_byte_length)
    s_bytes = fill_width(s_bytes, int_byte_length)
    return (r_bytes + s_bytes)
