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35 defensive html parsing #36

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35 defensive html parsing #36

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9e1855b
#35 Adding in tests to cover bugs
ericdbarry Jul 27, 2019
b864ab8
#35 Adding in fixes to broken tests, renaming test and data to be mor…
ericdbarry Jul 27, 2019
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6 changes: 4 additions & 2 deletions awsprocesscreds/saml.py
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,8 @@ def _retrieve_login_form_from_endpoint(self, endpoint):
if not form_action.lower().startswith('https://'):
raise SAMLError('Your SAML IdP must use HTTPS connection')
payload = dict((tag.attrib['name'], tag.attrib.get('value', ''))
for tag in login_form_html_node.findall(".//input"))
for tag in login_form_html_node.findall(
".//input[@name]"))
return form_action, payload

def _assert_non_error_response(self, response):
Expand Down Expand Up @@ -287,7 +288,8 @@ def _dict2str(self, d):
# so that the output will be suitable to be fed into an ET later.
parts = []
for k, v in d.items():
escaped_value = escape(v) # pylint: disable=deprecated-method
escaped_value = escape( # pylint: disable=deprecated-method
v) if v is not None else None
parts.append('%s="%s"' % (k, escaped_value))
return ' '.join(sorted(parts))

Expand Down
67 changes: 67 additions & 0 deletions tests/unit/test_saml.py
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Original file line number Diff line number Diff line change
Expand Up @@ -258,6 +258,73 @@ def tests_uses_default_form_values(self, generic_auth, generic_config,
}
)

def test_input_missing_name_attribute(self, generic_auth,
generic_config,
mock_requests_session):
saml_form = (
'<html>'
'<form action="/path/login/">'
'<input debug="true"/>'
'<input name="spam" value="eggs"/>'
'<input name="username"/>'
'<input name="password"/>'
'</form>'
'</html>'
)
mock_requests_session.get.return_value = mock.Mock(
spec=requests.Response, status_code=200, text=saml_form
)
mock_requests_session.post.return_value = mock.Mock(
spec=requests.Response, status_code=200, text=(
'<form><input name="SAMLResponse" '
'value="fakeassertion"/></form>'
)
)
saml_assertion = generic_auth.retrieve_saml_assertion(generic_config)
assert saml_assertion == 'fakeassertion'

mock_requests_session.post.assert_called_with(
"https://example.com/path/login/", verify=True,
data={
'username': 'monty',
'password': 'mypassword',
'spam': 'eggs'
}
)

def test_boolean_attribute_handling(self, generic_auth,
generic_config,
mock_requests_session):
saml_form = (
'<html>'
'<form action="/path/login/">'
'<input attr-is-true name="spam" value="eggs"/>'
'<input name="username"/>'
'<input name="password"/>'
'</form>'
'</html>'
)
mock_requests_session.get.return_value = mock.Mock(
spec=requests.Response, status_code=200, text=saml_form
)
mock_requests_session.post.return_value = mock.Mock(
spec=requests.Response, status_code=200, text=(
'<form><input name="SAMLResponse" '
'value="fakeassertion"/></form>'
)
)
saml_assertion = generic_auth.retrieve_saml_assertion(generic_config)
assert saml_assertion == 'fakeassertion'

mock_requests_session.post.assert_called_with(
"https://example.com/path/login/", verify=True,
data={
'username': 'monty',
'password': 'mypassword',
'spam': 'eggs'
}
)

def test_error_getting_form(self, generic_auth, mock_requests_session,
generic_config):
mock_requests_session.get.return_value = mock.Mock(
Expand Down