def _resolved_entry_phase_affordancesets(self, phase, affordances):
upstream_affordancesets = _set()
downstream_affordances = affordances.unfrozen_copy()
downstream_affordances.inputs = '*'
downstream_affordances.outputs = '*'
for resolved_input_affordances \
in self._resolved_phase_input_affordancesets\
(phase, 'upstream',
reverse_affordances=downstream_affordances):
upstream_affordances = resolved_input_affordances.unfrozen()
upstream_affordances.inputs = '*'
upstream_affordances.outputs = affordances.outputs
upstream_affordancesets.add(upstream_affordances.frozen())
self.logger.cond((_logging.DEBUG,
lambda: 'resolved upstream affordance sets {}'
.format(upstream_affordancesets)))
downstream_affordancesets = \
_frozenset(_chain(*[self._resolved_phase_output_affordancesets
(phase, 'downstream',
reverse_affordances=upstream_affordances)
for upstream_affordances
in upstream_affordancesets]))
self.logger.cond((_logging.DEBUG,
lambda: 'resolved downstream affordance sets {}'
.format(downstream_affordancesets)))
return downstream_affordancesets
def _resolved_phase_output_affordancesets(self, phase, direction,
reverse_affordances):
if direction == 'upstream':
if phase.output_target == 'supplicant':
connector_outputs = reverse_affordances.outputs
elif phase.output_target == 'end':
phase_affordances = \
phase.affordances(downstream=reverse_affordances)
else:
connector_outputs = reverse_affordances.inputs
phase_inputs = None
elif direction == 'downstream':
phase_affordances = \
_affordances.FrozenProcessProspectiveAffordanceSet\
.from_general\
(phase.affordances(upstream=reverse_affordances),
scanners=reverse_affordances.scanners,
clerks=reverse_affordances.clerks,
supplicants=reverse_affordances.supplicants)
connector_outputs = None
phase_inputs = reverse_affordances.outputs
phase_outputs = phase_affordances.outputs
try:
phase_outputs = phase_outputs.set()
except _coll.UnsupportedUniversalSetOperation:
raise RuntimeError\
('invalid acceptable outputs {!r} for authentication'
' algorithm phase {!r}; expected a finite set of'
' token sets'
.format(phase_outputs, phase))
else:
raise ValueError('invalid direction {!r}: expecting {!r} or {!r}'
.format(direction, 'upstream', 'downstream'))
def resolving_logmessage():
message = 'walking {}, resolving output affordances for phase {}'\
' (input from {}, output to {})'\
.format(direction, phase, phase.input_source,
phase.output_target)
if connector_outputs:
message += ' with {} outputs {}'.format(phase.output_target,
connector_outputs)
elif phase_inputs:
message += ' with inputs {}'.format(phase_inputs)
return message
self.logger.cond((_logging.DEBUG, resolving_logmessage))
reverse_affordances = reverse_affordances.unfrozen_copy()
if phase.output_target == 'clerk':
reverse_affordances.clerks = \
reverse_affordances.clerks.unfrozen_copy()
connectors = reverse_affordances.clerks
elif phase.output_target == 'supplicant':
reverse_affordances.supplicants = \
reverse_affordances.supplicants.unfrozen_copy()
connectors = reverse_affordances.supplicants
elif phase.output_target == 'end':
if direction == 'downstream':
return _frozenset((phase_affordances,))
else:
assert False
else:
assert False, \
'invalid output target {!r} for authentication'\
' algorithm phase {!r}; expecting one of {}'\
.format(phase.input_source, phase,
('clerk', 'supplicant', 'end'))
affordancesets = _set()
for connector in connectors.frozen():
connector_useful = False
if direction == 'upstream':
if phase.output_target == 'clerk':
connector_affordances = \
_affordances.FrozenProcessProspectiveAffordanceSet\
.from_general\
(connector.affordances(downstream=
reverse_affordances),
scanners=reverse_affordances.scanners,
clerks=(connector,),
supplicants=reverse_affordances.supplicants)
elif phase.output_target == 'supplicant':
connector_affordances = reverse_affordances
else:
assert False
if connector_affordances:
connector_inputs = connector_affordances.inputs
for connector_input in connector_inputs:
if phase.supports_output(connector_input,
downstream_affordances=
connector_affordances):
connector_useful = True
self.logger.cond\
((_logging.DEBUG,
_partial(self._considering_handlers_logmessage,
phase, connector_input, connector)))
connection_affordances = \
connector_affordances.unfrozen_copy()
connection_affordances.inputs = (connector_input,)
affordancesets |= \
self._resolved_phase_input_affordancesets\
(phase, 'upstream',
reverse_affordances=connector_affordances)
else:
for phase_output in phase_outputs:
if connector.supports_input(phase_output,
upstream_affordances=
phase_affordances):
self.logger.cond\
((_logging.DEBUG,
_partial(self._considering_handlers_logmessage,
phase, phase_output, connector)))
phase_connection_affordances = \
phase_affordances.unfrozen_copy()
phase_connection_affordances.outputs = (phase_output,)
connector_affordances = \
_affordances.ProcessProspectiveAffordanceSet\
.from_general\
(connector.affordances
(upstream=phase_connection_affordances),
scanners=reverse_affordances.scanners,
clerks=reverse_affordances.clerks,
supplicants=reverse_affordances.supplicants)
setattr(connector_affordances,
'{}s'.format(phase.output_target),
(connector,))
if connector_affordances:
connector_useful = True
next_phase = phase.next_phase
if next_phase:
next_phase_affordancesets = \
self._resolved_phase_input_affordancesets\
(next_phase, 'downstream',
reverse_affordances=
connector_affordances)
for next_affordances \
in next_phase_affordancesets:
affordances = next_affordances.unfrozen()
affordances.inputs = phase_inputs
affordances.outputs = \
connector_affordances.inputs
affordancesets.add(affordances.frozen())
else:
affordancesets.add(connector_affordances
.frozen())
if not connector_useful:
connectors.remove(connector)
return affordancesets
