def validate(self, request):
xmlstr = request.saml_request
data = saml_to_dict(xmlstr)
if self._action == 'login':
req_type = 'AuthnRequest'
elif self._action == 'logout':
req_type = 'LogoutRequest'
issuer_name = data.get(
'{urn:oasis:names:tc:SAML:2.0:protocol}%s' % (req_type),
{}).get('children',
{}).get('{urn:oasis:names:tc:SAML:2.0:assertion}Issuer',
{}).get('text')
if issuer_name is None:
raise UnknownEntityIDError(
'Issuer non presente nella {}'.format(req_type))
try:
sp_metadata = self._registry.load(issuer_name)
except MetadataNotFoundError:
raise UnknownEntityIDError(
'L\'entity ID "{}" indicato nell\'elemento <Issuer> non corrisponde a nessun Service Provider registrato in questo Identity Provider di test.'
.format(issuer_name))
atcss = sp_metadata.attribute_consuming_services
attribute_consuming_service_indexes = [
str(el.get('attrs').get('index')) for el in atcss
if 'index' in el.get('attrs', {})
]
ascss = sp_metadata.assertion_consumer_services
assertion_consumer_service_indexes = [
str(el.get('index')) for el in ascss
]
assertion_consumer_service_urls = [
str(el.get('Location')) for el in ascss
]
entity_id = self._config.entity_id
issuer = Schema(
{
'attrs': {
'Format':
Equal(
NAMEID_FORMAT_ENTITY,
msg=DEFAULT_VALUE_ERROR.format(NAMEID_FORMAT_ENTITY)),
'NameQualifier':
Any(Url(), Match(r'^urn:'), msg="Invalid URI"),
},
'children': {},
'text': str,
},
required=True,
)
name_id = Schema(
{
'attrs': {
'NameQualifier':
str,
'Format':
Equal(NAMEID_FORMAT_TRANSIENT,
msg=DEFAULT_VALUE_ERROR.format(
NAMEID_FORMAT_TRANSIENT)),
},
'children': {},
'text': str
},
required=True,
)
name_id_policy = Schema(
{
'attrs': {
'Format':
Equal(NAMEID_FORMAT_TRANSIENT,
msg=DEFAULT_VALUE_ERROR.format(
NAMEID_FORMAT_TRANSIENT)),
Optional('SPNameQualifier'):
str,
},
'children': {},
'text': None,
},
required=True,
)
conditions = Schema(
{
'attrs': {
'NotBefore': All(str, _check_utc_date),
'NotOnOrAfter': All(str, _check_utc_date),
},
'children': {},
'text': None,
},
required=True,
)
authn_context_class_ref = Schema(
{
'attrs': {},
'children': {},
'text':
All(
str,
In(SPID_LEVELS,
msg=DEFAULT_LIST_VALUE_ERROR.format(
', '.join(SPID_LEVELS))))
},
required=True,
)
requested_authn_context = Schema(
{
'attrs': {
'Comparison': str
},
'children': {
'{%s}AuthnContextClassRef' % (ASSERTION):
authn_context_class_ref
},
'text': None
},
required=True,
)
scoping = Schema(
{
'attrs': {
'ProxyCount': Equal('0',
msg=DEFAULT_VALUE_ERROR.format('0'))
},
'children': {},
'text': None
},
required=True,
)
signature = Schema(
{
'attrs': dict,
'children': dict,
'text': None
},
required=True,
)
subject = Schema(
{
'attrs': {
'Format':
Equal(
NAMEID_FORMAT_ENTITY,
msg=DEFAULT_VALUE_ERROR.format(NAMEID_FORMAT_ENTITY)),
'NameQualifier':
str
},
'children': {},
'text': None
},
required=True,
)
# LOGIN
def check_assertion_consumer_service(attrs):
keys = list(attrs.keys())
if ('AssertionConsumerServiceURL' in keys
and 'ProtocolBinding' in keys
and 'AssertionConsumerServiceIndex' not in keys):
_errors = []
if attrs['ProtocolBinding'] != BINDING_HTTP_POST:
_errors.append(
Invalid(DEFAULT_VALUE_ERROR.format(BINDING_HTTP_POST),
path=['ProtocolBinding']))
if attrs[
'AssertionConsumerServiceURL'] not in assertion_consumer_service_urls:
_errors.append(
Invalid(DEFAULT_VALUE_ERROR.format(
assertion_consumer_service_urls),
path=['AssertionConsumerServiceURL']))
if _errors:
raise MultipleInvalid(errors=_errors)
return attrs
elif ('AssertionConsumerServiceURL' not in keys
and 'ProtocolBinding' not in keys
and 'AssertionConsumerServiceIndex' in keys):
if attrs[
'AssertionConsumerServiceIndex'] not in assertion_consumer_service_indexes:
raise Invalid(DEFAULT_LIST_VALUE_ERROR.format(
', '.join(assertion_consumer_service_indexes)),
path=['AssertionConsumerServiceIndex'])
return attrs
else:
raise Invalid(
'Uno e uno solo uno tra gli attributi o gruppi di attributi devono essere presenti: '
'[AssertionConsumerServiceIndex, [AssertionConsumerServiceUrl, ProtocolBinding]]'
)
authnrequest_attr_schema = Schema(All(
{
'ID':
str,
'Version':
Equal('2.0', msg=DEFAULT_VALUE_ERROR.format('2.0')),
'IssueInstant':
All(str, _check_utc_date, self._check_date_in_range),
'Destination':
In([entity_id, self._config.absolute_sso_url],
msg=DEFAULT_VALUE_ERROR.format(entity_id)),
Optional('ForceAuthn'):
str,
Optional('AttributeConsumingServiceIndex'):
In(attribute_consuming_service_indexes,
msg=DEFAULT_LIST_VALUE_ERROR.format(
', '.join(attribute_consuming_service_indexes))),
Optional('AssertionConsumerServiceIndex'):
str,
Optional('AssertionConsumerServiceURL'):
str,
Optional('ProtocolBinding'):
str,
},
check_assertion_consumer_service,
),
required=True)
AUTHNREQUEST_TAG = '{%s}AuthnRequest' % (PROTOCOL)
authnrequest_schema = {
AUTHNREQUEST_TAG: {
'attrs':
authnrequest_attr_schema,
'children':
Schema(
{
Optional('{%s}Subject' % (ASSERTION)): subject,
'{%s}Issuer' % (ASSERTION): issuer,
'{%s}NameIDPolicy' % (PROTOCOL): name_id_policy,
Optional('{%s}Conditions' % (ASSERTION)): conditions,
'{%s}RequestedAuthnContext' % (PROTOCOL):
requested_authn_context,
Optional('{%s}Scoping' % (PROTOCOL)): scoping,
},
required=True,
),
'text':
None
}
}
# LOGOUT
LOGOUTREQUEST_TAG = '{%s}LogoutRequest' % (PROTOCOL)
logoutrequest_attr_schema = Schema(All({
'ID':
str,
'Version':
Equal('2.0', msg=DEFAULT_VALUE_ERROR.format('2.0')),
'IssueInstant':
All(str, _check_utc_date, self._check_date_in_range),
'Destination':
In([entity_id, self._config.absolute_slo_url],
msg=DEFAULT_VALUE_ERROR.format(entity_id)),
Optional('NotOnOrAfter'):
All(str, _check_utc_date, self._check_date_not_expired),
Optional('Reason'):
str,
}),
required=True)
logoutrequest_schema = {
LOGOUTREQUEST_TAG: {
'attrs':
logoutrequest_attr_schema,
'children':
Schema(
{
'{%s}Issuer' % (ASSERTION): issuer,
'{%s}NameID' % (ASSERTION): name_id,
'{%s}SessionIndex' % (PROTOCOL): dict,
},
required=True),
'text':
None
}
}
if self._binding == BINDING_HTTP_POST:
if self._action == 'login':
# Add signature schema
_new_sub_schema = authnrequest_schema[AUTHNREQUEST_TAG][
'children'].extend(
{'{%s}Signature' % (SIGNATURE): signature})
authnrequest_schema[AUTHNREQUEST_TAG][
'children'] = _new_sub_schema
if self._action == 'logout':
_new_sub_schema = logoutrequest_schema[LOGOUTREQUEST_TAG][
'children'].extend(
{'{%s}Signature' % (SIGNATURE): signature})
logoutrequest_schema[LOGOUTREQUEST_TAG][
'children'] = _new_sub_schema
authn_request = Schema(
authnrequest_schema,
required=True,
)
logout_request = Schema(
logoutrequest_schema,
required=True,
)
saml_schema = None
if self._action == 'login':
saml_schema = authn_request
elif self._action == 'logout':
saml_schema = logout_request
errors = []
try:
saml_schema(data)
except MultipleInvalid as e:
for err in e.errors:
_paths = []
_attr = None
for idx, _path in enumerate(err.path):
if _path != 'children':
if _path == 'attrs':
try:
_attr = err.path[(idx + 1)]
except IndexError:
_attr = ''
break
# strip namespaces for better readability
_paths.append(_strip_namespaces(str(_path)))
path = '/'.join(_paths)
if _attr is not None:
path += " - attribute: " + _attr
# find value to show (iterate multiple times inside data
# until we find the sub-element or attribute)
_val = data
for _ in err.path:
try:
_val = _val[_]
except KeyError:
_val = None
except ValueError:
_val = None
# no need to show value if the error is the presence of the element
_msg = err.msg
if "extra keys not allowed" in _msg:
_val = None
_msg = "item not allowed"
errors.append(
ValidationDetail(_val, None, None, None, None, _msg, path))
raise SPIDValidationError(details=errors)
def validate(self, request):
xmlstr = request.saml_request
data = saml_to_dict(xmlstr)
atcss = []
if self._action == 'login':
req_type = 'AuthnRequest'
service = 'single_sign_on_service'
elif self._action == 'logout':
req_type = 'LogoutRequest'
service = 'single_logout_service'
issuer_name = data.get(
'{urn:oasis:names:tc:SAML:2.0:protocol}%s' % (req_type),
{}).get('children',
{}).get('{urn:oasis:names:tc:SAML:2.0:assertion}Issuer',
{}).get('text')
if issuer_name and issuer_name not in self._metadata.service_providers(
):
raise UnknownEntityIDError(
'entity ID {} non registrato'.format(issuer_name))
for k, _md in self._metadata.items():
if k == issuer_name:
_srvs = _md.get('spsso_descriptor', [])
for _srv in _srvs:
for _acs in _srv.get('attribute_consuming_service', []):
atcss.append(_acs)
try:
ascss = self._metadata.assertion_consumer_service(issuer_name)
except Exception:
ascss = []
except Exception:
ascss = []
attribute_consuming_service_indexes = [
str(el.get('index')) for el in atcss
]
assertion_consumer_service_indexes = [
str(el.get('index')) for el in ascss
]
receivers = self._config.receivers(service)
issuer = Schema(
{
'attrs': {
'Format':
Equal(
NAMEID_FORMAT_ENTITY,
msg=DEFAULT_VALUE_ERROR.format(NAMEID_FORMAT_ENTITY)),
'NameQualifier':
Equal(issuer_name,
msg=DEFAULT_VALUE_ERROR.format(issuer_name)),
},
'children': {},
'text': str,
},
required=True,
)
name_id = Schema(
{
'attrs': {
'NameQualifier':
str,
'Format':
Equal(NAMEID_FORMAT_TRANSIENT,
msg=DEFAULT_VALUE_ERROR.format(
NAMEID_FORMAT_TRANSIENT)),
},
'children': {},
'text': str
},
required=True,
)
name_id_policy = Schema(
{
'attrs': {
'Format':
Equal(NAMEID_FORMAT_TRANSIENT,
msg=DEFAULT_VALUE_ERROR.format(
NAMEID_FORMAT_TRANSIENT)),
},
'children': {},
'text': None,
},
required=True,
)
conditions = Schema(
{
'attrs': {
'NotBefore': All(str, self._check_utc_date),
'NotOnOrAfter': All(str, self._check_utc_date),
},
'children': {},
'text': None,
},
required=True,
)
authn_context_class_ref = Schema(
{
'attrs': {},
'children': {},
'text':
All(
str,
In(SPID_LEVELS,
msg=DEFAULT_LIST_VALUE_ERROR.format(SPID_LEVELS)))
},
required=True,
)
requested_authn_context = Schema(
{
'attrs': {
'Comparison': str
},
'children': {
'{%s}AuthnContextClassRef' % (ASSERTION):
authn_context_class_ref
},
'text': None
},
required=True,
)
scoping = Schema(
{
'attrs': {
'ProxyCount': Equal('0',
msg=DEFAULT_VALUE_ERROR.format('0'))
},
'children': {},
'text': None
},
required=True,
)
signature = Schema(
{
'attrs': dict,
'children': dict,
'text': None
},
required=True,
)
subject = Schema(
{
'attrs': {
'Format':
Equal(
NAMEID_FORMAT_ENTITY,
msg=DEFAULT_VALUE_ERROR.format(NAMEID_FORMAT_ENTITY)),
'NameQualifier':
str
},
'children': {},
'text': None
},
required=True,
)
# LOGIN
def check_assertion_consumer_service(attrs):
keys = attrs.keys()
if ('AssertionConsumerServiceURL' in keys
and 'ProtocolBinding' in keys
and 'AssertionConsumerServiceIndex' not in keys):
if attrs['ProtocolBinding'] != BINDING_HTTP_POST:
raise Invalid(
DEFAULT_VALUE_ERROR.format(BINDING_HTTP_POST),
path=['ProtocolBinding'])
return attrs
elif ('AssertionConsumerServiceURL' not in keys
and 'ProtocolBinding' not in keys
and 'AssertionConsumerServiceIndex' in keys):
if attrs[
'AssertionConsumerServiceIndex'] not in assertion_consumer_service_indexes:
raise Invalid(DEFAULT_LIST_VALUE_ERROR.format(
assertion_consumer_service_indexes),
path=['AssertionConsumerServiceIndex'])
return attrs
else:
raise Invalid(
'Uno e uno solo uno tra gli attributi o gruppi di attributi devono essere presenti: '
'[AssertionConsumerServiceIndex, [AssertionConsumerServiceUrl, ProtocolBinding]]'
)
authnrequest_attr_schema = Schema(All(
{
'ID':
str,
'Version':
Equal('2.0', msg=DEFAULT_VALUE_ERROR.format('2.0')),
'IssueInstant':
All(str, self._check_utc_date, self._check_date_in_range),
'Destination':
In(receivers, msg=DEFAULT_LIST_VALUE_ERROR.format(receivers)),
Optional('ForceAuthn'):
str,
Optional('AttributeConsumingServiceIndex'):
In(attribute_consuming_service_indexes,
msg=DEFAULT_LIST_VALUE_ERROR.format(
attribute_consuming_service_indexes)),
Optional('AssertionConsumerServiceIndex'):
str,
Optional('AssertionConsumerServiceURL'):
str,
Optional('ProtocolBinding'):
str,
},
check_assertion_consumer_service,
),
required=True)
authnrequest_schema = {
'{%s}AuthnRequest' % (PROTOCOL): {
'attrs':
authnrequest_attr_schema,
'children':
Schema(
{
Optional('{%s}Subject' % (ASSERTION)): subject,
'{%s}Issuer' % (ASSERTION): issuer,
'{%s}NameIDPolicy' % (PROTOCOL): name_id_policy,
Optional('{%s}Conditions' % (ASSERTION)): conditions,
'{%s}RequestedAuthnContext' % (PROTOCOL):
requested_authn_context,
Optional('{%s}Scoping' % (PROTOCOL)): scoping,
},
required=True,
),
'text':
None
}
}
if self._binding == BINDING_HTTP_POST:
authnrequest_schema['{%s}AuthnRequest' %
(PROTOCOL)]['children'].extend = {
'{%s}Signature' % (SIGNATURE): signature
}
authn_request = Schema(
authnrequest_schema,
required=True,
)
# LOGOUT
logout_request = Schema(
{
'{%s}LogoutRequest' % (PROTOCOL): {
'attrs': {
'ID':
str,
'Version':
Equal('2.0', msg=DEFAULT_VALUE_ERROR.format('2.0')),
'IssueInstant':
All(str, self._check_utc_date,
self._check_date_in_range),
'Destination':
In(receivers,
msg=DEFAULT_LIST_VALUE_ERROR.format(receivers)),
},
'children': {
'{%s}Issuer' % (ASSERTION): issuer,
'{%s}NameID' % (ASSERTION): name_id,
'{%s}SessionIndex' % (PROTOCOL): dict,
},
'text': None
}
},
required=True,
)
saml_schema = None
if self._action == 'login':
saml_schema = authn_request
elif self._action == 'logout':
saml_schema = logout_request
errors = []
try:
saml_schema(data)
except MultipleInvalid as e:
for err in e.errors:
_val = data
_paths = []
_attr = None
for idx, _path in enumerate(err.path):
if _path != 'children':
if _path == 'attrs':
try:
_attr = err.path[(idx + 1)]
except IndexError:
_attr = ''
break
_paths.append(_path)
path = '/'.join(_paths)
path = 'xpath: {}'.format(path)
if _attr is not None:
path = '{} - attribute: {}'.format(path, _attr)
for _ in err.path:
_val = _val.get(_)
errors.append(
ValidationDetail(_val, None, None, None, None, err.msg,
path))
raise SPIDValidationError(details=errors)
def validate(self, metadata):
data = saml_to_dict(metadata)
key_descriptor = Schema(
All([{
'attrs':
Schema(
{
'use':
All(
str,
In(KEYDESCRIPTOR_USES,
msg=DEFAULT_LIST_VALUE_ERROR.format(
', '.join(KEYDESCRIPTOR_USES)))),
},
required=True),
'children': {
'{%s}KeyInfo' % (SIGNATURE): {
'attrs': {},
'children': {
'{%s}X509Data' % (SIGNATURE): {
'attrs': {},
'children': {
'{%s}X509Certificate' % (SIGNATURE): {
'attrs': {},
'children': {},
'text': All(str, _check_certificate)
}
},
'text': None
}
},
'text': None
}
},
'text':
None
}], self._check_keydescriptor),
required=True,
)
slo = Schema(
All([{
'attrs': dict,
'children': dict,
'text': None
}], Length(min=1)),
required=True,
)
acs = Schema(
All([{
'attrs': dict,
'children': dict,
'text': None
}], Length(min=1)),
required=True,
)
atcs = Schema(
All([{
'attrs': {
'index': str
},
'children': {
'{%s}ServiceName' % (METADATA): {
'attrs': dict,
'children': {},
'text': str
},
Optional('{%s}ServiceDescription' % (METADATA)): {
'attrs': dict,
'children': {},
'text': str
},
'{%s}RequestedAttribute' % (METADATA):
All([{
'attrs': {
'Name':
All(
str,
In(SPID_ATTRIBUTES_NAMES,
msg=DEFAULT_LIST_VALUE_ERROR.format(
', '.join(SPID_ATTRIBUTES_NAMES)))),
Optional('NameFormat'):
Equal(NAME_FORMAT_BASIC,
msg=DEFAULT_VALUE_ERROR.format(
NAME_FORMAT_BASIC)),
Optional('FriendlyName'):
str,
Optional('isRequired'):
str
},
'children': {},
'text': None
}], Length(min=1)),
},
'text': None
}], Length(min=1)),
required=True,
)
name_id_format = Schema(
{
'attrs': {},
'children': {},
'text':
Equal(NAMEID_FORMAT_TRANSIENT,
msg=DEFAULT_VALUE_ERROR.format(NAMEID_FORMAT_TRANSIENT)),
},
required=True,
)
spsso_descriptor_attr_schema = Schema(All({
'protocolSupportEnumeration':
Equal(PROTOCOL, msg=DEFAULT_VALUE_ERROR.format(PROTOCOL)),
'AuthnRequestsSigned':
Equal('true', msg=DEFAULT_VALUE_ERROR.format('true')),
Optional('WantAssertionsSigned'):
str,
}),
required=True)
spsso = Schema(
{
'attrs': spsso_descriptor_attr_schema,
'children': {
'{%s}KeyDescriptor' % (METADATA): key_descriptor,
'{%s}SingleLogoutService' % (METADATA): slo,
'{%s}AssertionConsumerService' % (METADATA): acs,
'{%s}AttributeConsumingService' % (METADATA): atcs,
'{%s}NameIDFormat' % (METADATA): name_id_format,
},
'text': None
},
required=True)
entity_descriptor_schema = Schema(
{
'{%s}EntityDescriptor' % (METADATA): {
'attrs':
Schema(
{
'entityID': str,
Optional('ID'): str,
Optional('validUntil'): All(str, _check_utc_date),
Optional('cacheDuration'): str,
Optional('Name'): str,
},
required=True),
'children':
Schema(
{
Optional('{%s}Signature' % (SIGNATURE)):
Schema(
{
'attrs': dict,
'children': dict,
'text': None
},
required=True,
),
'{%s}SPSSODescriptor' % (METADATA):
spsso,
Optional('{%s}Organization' % (METADATA)):
dict,
Optional('{%s}ContactPerson' % (METADATA)):
list
},
required=True),
'text':
None
}
},
required=True)
errors = []
try:
entity_descriptor_schema(data)
except MultipleInvalid as e:
for err in e.errors:
_val = data
_paths = []
_attr = None
for idx, _path in enumerate(err.path):
if _path != 'children':
if _path == 'attrs':
try:
_attr = err.path[(idx + 1)]
except IndexError:
_attr = ''
break
# strip namespaces for better readability
_paths.append(_strip_namespaces(str(_path)))
path = '/'.join(_paths)
if _attr is not None:
path = '{} - attribute: {}'.format(path, _attr)
for _ in err.path:
try:
_val = _val[_]
except IndexError:
_val = None
except KeyError:
_val = None
errors.append(
ValidationDetail(_val, None, None, None, None, err.msg,
path))
raise SPIDValidationError(details=errors)