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Parse role specification more robustly #230

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Parse role specification more robustly #230

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3 changes: 2 additions & 1 deletion aws_google_auth/amazon.py
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,8 @@ def roles(self):
roles = {}
for x in doc.xpath('//*[@Name = "https://aws.amazon.com/SAML/Attributes/Role"]//text()'):
if "arn:aws:iam:" in x or "arn:aws-us-gov:iam:" in x:
res = x.split(',')
res = sorted([s.strip() for s in x.split(',')],
key=lambda s: ':role/' in s, reverse=True)
roles[res[0]] = res[1]
return roles

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30 changes: 30 additions & 0 deletions aws_google_auth/tests/test_amazon.py
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,36 @@ def test_role_extraction_too_many_commas(self):
"arn:aws:iam::123456789012:role/test"]
self.assertEqual(sorted(list(a.roles.keys())), sorted(list_of_testing_roles))

def test_role_extraction_role_saml_provider_wrong_order(self):
saml_xml = self.read_local_file('valid-response.xml')
provider = 'arn:aws:iam::123456789012:saml-provider/GoogleApps'
list_of_testing_roles = [
"arn:aws:iam::123456789012:role/admin",
"arn:aws:iam::123456789012:role/read-only",
"arn:aws:iam::123456789012:role/test"]
for role in list_of_testing_roles:
saml_xml = saml_xml.replace(f'{role},{provider}'.encode('utf-8'),
f'{provider},{role}'.encode('utf-8'))
a = amazon.Amazon(self.valid_config, saml_xml)
self.assertIsInstance(a.roles, dict)
self.assertEqual(sorted(list(a.roles.keys())), sorted(list_of_testing_roles))
self.assertEqual(set(a.roles.values()), set((provider,)))

def test_role_extraction_whitespace(self):
saml_xml = self.read_local_file('valid-response.xml')
provider = 'arn:aws:iam::123456789012:saml-provider/GoogleApps'
list_of_testing_roles = [
"arn:aws:iam::123456789012:role/admin",
"arn:aws:iam::123456789012:role/read-only",
"arn:aws:iam::123456789012:role/test"]
for role in list_of_testing_roles:
saml_xml = saml_xml.replace(f'{role},{provider}'.encode('utf-8'),
f'{role}, {provider}'.encode('utf-8'))
a = amazon.Amazon(self.valid_config, saml_xml)
self.assertIsInstance(a.roles, dict)
self.assertEqual(sorted(list(a.roles.keys())), sorted(list_of_testing_roles))
self.assertEqual(set(a.roles.values()), set((provider,)))

def test_invalid_saml_too_soon(self):
saml_xml = self.read_local_file('saml-response-too-soon.xml')
self.assertFalse(amazon.Amazon.is_valid_saml_assertion(saml_xml))
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