def _jwa(self, name):
try:
attr = '_jwa_%s' % name.replace('-', '_').replace('+', '_')
fn = getattr(self, attr)
except (KeyError, AttributeError):
raise InvalidJWAAlgorithm()
allowed = self._allowed_algs or default_allowed_algs
if name not in allowed:
raise InvalidJWEOperation('Algorithm not allowed')
return fn()
def _jwa(self, name, allowed):
if allowed is None:
allowed = default_allowed_algs
attr = '_jwa_%s' % name
try:
fn = getattr(self, attr)
except (KeyError, AttributeError):
raise InvalidJWAAlgorithm()
if name not in allowed:
raise InvalidJWSOperation('Algorithm not allowed')
return fn()
def encryption_alg(cls, name):
try:
return cls.instantiate_alg(name, use='enc')
except KeyError:
raise InvalidJWAAlgorithm(
'%s is not a valid Encryption algorithm name' % name)
def keymgmt_alg(cls, name):
try:
return cls.instantiate_alg(name, use='kex')
except KeyError:
raise InvalidJWAAlgorithm(
'%s is not a valid Key Management algorithm name' % name)
def signing_alg(cls, name):
try:
return cls.instantiate_alg(name, use='sig')
except KeyError:
raise InvalidJWAAlgorithm(
'%s is not a valid Signign algorithm name' % name)