def get_enabled_by_backend_name(cls, backend_name):
"""Generator returning all enabled providers that use the specified
backend on the current site.
Example:
>>> list(get_enabled_by_backend_name("tpa-saml"))
[<SAMLProviderConfig>, <SAMLProviderConfig>]
Args:
backend_name: The name of a python-social-auth backend used by
one or more providers.
Yields:
Instances of ProviderConfig.
"""
if backend_name in _PSA_OAUTH2_BACKENDS:
oauth2_backend_names = OAuth2ProviderConfig.key_values(
'backend_name', flat=True)
for oauth2_backend_name in oauth2_backend_names:
provider = OAuth2ProviderConfig.current(oauth2_backend_name)
if provider.backend_name == backend_name and provider.enabled_for_current_site:
yield provider
elif backend_name in _PSA_SAML_BACKENDS and SAMLConfiguration.is_enabled(
Site.objects.get_current(get_current_request()), 'default'):
idp_names = SAMLProviderConfig.key_values('slug', flat=True)
for idp_name in idp_names:
provider = SAMLProviderConfig.current(idp_name)
if provider.backend_name == backend_name and provider.enabled_for_current_site:
yield provider
elif backend_name in _LTI_BACKENDS:
for consumer_key in LTIProviderConfig.key_values(
'lti_consumer_key', flat=True):
provider = LTIProviderConfig.current(consumer_key)
if provider.backend_name == backend_name and provider.enabled_for_current_site:
yield provider
def _enabled_providers(cls):
"""
Helper method that returns a generator used to iterate over all providers
of the current site.
"""
oauth2_backend_names = OAuth2ProviderConfig.key_values('backend_name',
flat=True)
for oauth2_backend_name in oauth2_backend_names:
provider = OAuth2ProviderConfig.current(oauth2_backend_name)
if provider.enabled_for_current_site and provider.backend_name in _PSA_OAUTH2_BACKENDS:
yield provider
if SAMLConfiguration.is_enabled(
Site.objects.get_current(get_current_request()), 'default'):
idp_slugs = SAMLProviderConfig.key_values('slug', flat=True)
for idp_slug in idp_slugs:
provider = SAMLProviderConfig.current(idp_slug)
if provider.enabled_for_current_site and provider.backend_name in _PSA_SAML_BACKENDS:
yield provider
for consumer_key in LTIProviderConfig.key_values('lti_consumer_key',
flat=True):
provider = LTIProviderConfig.current(consumer_key)
if provider.enabled_for_current_site and provider.backend_name in _LTI_BACKENDS:
yield provider
def fetch_saml_metadata():
"""
Fetch and store/update the metadata of all IdPs
This task should be run on a daily basis.
It's OK to run this whether or not SAML is enabled.
Return value:
tuple(num_skipped, num_attempted, num_updated, num_failed, failure_messages)
num_total: Total number of providers found in the database
num_skipped: Number of providers skipped for various reasons (see L52)
num_attempted: Number of providers whose metadata was fetched
num_updated: Number of providers that are either new or whose metadata has changed
num_failed: Number of providers that could not be updated
failure_messages: List of error messages for the providers that could not be updated
"""
# First make a list of all the metadata XML URLs:
saml_providers = SAMLProviderConfig.key_values('slug', flat=True)
num_total = len(saml_providers)
num_skipped = 0
url_map = {}
for idp_slug in saml_providers:
config = SAMLProviderConfig.current(idp_slug)
saml_config_slug = config.saml_configuration.slug if config.saml_configuration else 'default'
# Skip SAML provider configurations which do not qualify for fetching
if any([
not config.enabled, not config.automatic_refresh_enabled,
not SAMLConfiguration.is_enabled(config.site, saml_config_slug)
]):
num_skipped += 1
continue
url = config.metadata_source
if url not in url_map:
url_map[url] = []
if config.entity_id not in url_map[url]:
url_map[url].append(config.entity_id)
# Now attempt to fetch the metadata for the remaining SAML providers:
num_attempted = len(url_map)
num_updated = 0
failure_messages = [] # We return the length of this array for num_failed
for url, entity_ids in url_map.items():
try:
log.info(u"Fetching %s", url)
if not url.lower().startswith('https'):
log.warning(
u"This SAML metadata URL is not secure! It should use HTTPS. (%s)",
url)
response = requests.get(
url, verify=True
) # May raise HTTPError or SSLError or ConnectionError
response.raise_for_status() # May raise an HTTPError
try:
parser = etree.XMLParser(remove_comments=True)
xml = etree.fromstring(response.content, parser)
except etree.XMLSyntaxError:
raise
# TODO: Can use OneLogin_Saml2_Utils to validate signed XML if anyone is using that
for entity_id in entity_ids:
log.info(u"Processing IdP with entityID %s", entity_id)
public_key, sso_url, expires_at = _parse_metadata_xml(
xml, entity_id)
changed = _update_data(entity_id, public_key, sso_url,
expires_at)
if changed:
log.info(u"→ Created new record for SAMLProviderData")
num_updated += 1
else:
log.info(
u"→ Updated existing SAMLProviderData. Nothing has changed."
)
except (exceptions.SSLError, exceptions.HTTPError,
exceptions.RequestException, MetadataParseError) as error:
# Catch and process exception in case of errors during fetching and processing saml metadata.
# Here is a description of each exception.
# SSLError is raised in case of errors caused by SSL (e.g. SSL cer verification failure etc.)
# HTTPError is raised in case of unexpected status code (e.g. 500 error etc.)
# RequestException is the base exception for any request related error that "requests" lib raises.
# MetadataParseError is raised if there is error in the fetched meta data (e.g. missing @entityID etc.)
log.exception(text_type(error))
failure_messages.append(
u"{error_type}: {error_message}\nMetadata Source: {url}\nEntity IDs: \n{entity_ids}."
.format(error_type=type(error).__name__,
error_message=text_type(error),
url=url,
entity_ids="\n".join([
u"\t{}: {}".format(count, item)
for count, item in enumerate(entity_ids, start=1)
], )))
except etree.XMLSyntaxError as error:
log.exception(text_type(error))
failure_messages.append(
u"XMLSyntaxError: {error_message}\nMetadata Source: {url}\nEntity IDs: \n{entity_ids}."
.format(error_message=str(error.error_log),
url=url,
entity_ids="\n".join([
u"\t{}: {}".format(count, item)
for count, item in enumerate(entity_ids, start=1)
], )))
# Return counts for total, skipped, attempted, updated, and failed, along with any failure messages
return num_total, num_skipped, num_attempted, num_updated, len(
failure_messages), failure_messages