def get_saml_response(self, key_file: Optional[str],
cert_file: Optional[str]) -> SAMLResponse:
"""
Extract and decrypt a SAML response from POST data.
:param key_file: An optional path to a key to decrypt the response.
:param cert_file: An optional path to a certificate to verify the response.
:return: A SAML response.
"""
raw_response = b64decode(
self.request.POST.get('SAMLResponse',
'').encode('ascii')).decode('utf-8')
LOGGER.debug('Raw SAML Response: %s', raw_response)
try:
response = SAMLResponse(parse_xml(raw_response),
self.request.POST.get('RelayState'))
except XMLSyntaxError as e:
raise ParseError(str(e)) from None
LOGGER.info(
'[#%r] Received SAML response: id=%r, issuer=%r, in_response_to_id=%r',
self.log_id, response.id, response.issuer,
response.in_response_to_id)
if cert_file:
response.verify_response(cert_file)
if key_file:
response.decrypt(key_file)
if cert_file:
response.verify_assertion(cert_file)
return response
def test_verify_assertion_nia_not_decrypted(self):
with cast(TextIO, (DATA_DIR / 'nia_test_response.xml').open('r')) as f:
tree = parse_xml(f.read())
remove_extra_xml_whitespace(tree)
response = SAMLResponse(tree)
self.assertFalse(response.verify_assertion(NIA_CERT_FILE))
def post(self, request: HttpRequest) -> HttpResponse:
"""Handle a HTTP POST request."""
saml_response_xml = b64decode(self.request.POST.get('SAMLResponse', '').encode('ascii')).decode('utf-8')
if saml_response_xml:
# Verify signatures
cert_file = (CONNECTOR_SETTINGS.service_provider['response_signature'] or {}).get('cert_file')
if cert_file:
response = SAMLResponse(parse_xml(saml_response_xml))
response.verify_response(cert_file)
response.verify_assertion(cert_file)
# Reformat with pretty printing for display
saml_response_xml = dump_xml(parse_xml(saml_response_xml)).decode('utf-8')
self.saml_response = saml_response_xml
self.relay_state = self.request.POST.get('RelayState')
return self.get(request)
def test_verify_assertion_without_assertion(self):
with cast(TextIO,
(DATA_DIR / 'signed_failed_response.xml').open('r')) as f:
tree = parse_xml(f.read())
remove_extra_xml_whitespace(tree)
response = SAMLResponse(tree)
self.assertFalse(response.verify_assertion(CERT_FILE))