def change_password()

in fxa/core.py [0:0]

• 27 lines of code
• 5 McCabe index (conditional complexity)

    def change_password(self, email, oldpwd=None, newpwd=None,
                        oldstretchpwd=None, newstretchpwd=None):
        exactly_one_of(oldpwd, "oldpwd", oldstretchpwd, "oldstretchpwd")
        exactly_one_of(newpwd, "newpwd", newstretchpwd, "newstretchpwd")

        if self.key_stretch_version == 2:
            version, salt = self.get_key_stretch_version(email)
            old_spwd = StretchedPassword(version, email, salt, oldpwd, oldstretchpwd)
            new_spwd = StretchedPassword(2, email, salt, newpwd, newstretchpwd)

            if version == 2:
                resp = self.start_password_change(email, old_spwd.v2)
                kb = self.fetch_keys(resp["keyFetchToken2"], old_spwd.v2)[1]
            else:
                resp = self.start_password_change(email, old_spwd.v1)["passwordChangeToken"]
                kb = self.fetch_keys(resp["keyFetchToken"], old_spwd.v1)[1]

            self.finish_password_change_v2(
                resp["passwordChangeToken"],
                new_spwd,
                kb)
        else:
            if oldpwd:
                oldstretchpwd = quick_stretch_password(email, oldpwd)
            if newpwd:
                newstretchpwd = quick_stretch_password(email, newpwd)
            resp = self.start_password_change(email, oldstretchpwd)
            kb = self.fetch_keys(resp["keyFetchToken"], oldstretchpwd)[1]
            new_wrapkb = derive_wrap_kb(kb, newstretchpwd)
            self.finish_password_change(resp["passwordChangeToken"], newstretchpwd, new_wrapkb)