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Merge pull request #189 from sdelements/add_missing_authn_test
Add missing post authn test
2 parents 2f80dbb + 1ce5405 commit 8d9b692

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+87
-1
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5 files changed

+87
-1
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‎djangosaml2/tests/__init__.py

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Original file line numberDiff line numberDiff line change
@@ -37,6 +37,7 @@
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from djangosaml2.conf import get_config
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from djangosaml2.signals import post_authenticated
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from djangosaml2.tests import conf
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from djangosaml2.tests.utils import SAMLPostFormParser
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from djangosaml2.tests.auth_response import auth_response
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from djangosaml2.views import finish_logout
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from saml2.config import SPConfig
@@ -108,6 +109,35 @@ def render_template(self, text):
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def b64_for_post(self, xml_text, encoding='utf-8'):
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return base64.b64encode(xml_text.encode(encoding)).decode('ascii')
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def test_unsigned_post_authn_request(self):
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"""
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Test that unsigned authentication requests via POST binding
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does not error.
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https://github.com/knaperek/djangosaml2/issues/168
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"""
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settings.SAML_CONFIG = conf.create_conf(
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sp_host='sp.example.com',
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idp_hosts=['idp.example.com'],
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metadata_file='remote_metadata_post_binding.xml',
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authn_requests_signed=False
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)
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response = self.client.get(reverse('saml2_login'))
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self.assertEqual(response.status_code, 200)
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# Using POST-binding returns a page with form containing the SAMLRequest
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response_parser = SAMLPostFormParser()
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response_parser.feed(response.content.decode('utf-8'))
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saml_request = response_parser.saml_request_value
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expected_request = """<samlp:AuthnRequest xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" AssertionConsumerServiceURL="http://sp.example.com/saml2/acs/" Destination="https://idp.example.com/simplesaml/saml2/idp/SSOService.php" ID="XXXXXXXXXXXXXXXXXXXXXX" IssueInstant="2010-01-01T00:00:00Z" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Version="2.0"><saml:Issuer Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity">http://sp.example.com/saml2/metadata/</saml:Issuer><samlp:NameIDPolicy AllowCreate="false" Format="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" /></samlp:AuthnRequest>"""
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self.assertIsNotNone(saml_request)
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self.assertSAMLRequestsEquals(
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base64.b64decode(saml_request).decode('utf-8'),
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expected_request
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)
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111141
def test_login_evil_redirect(self):
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"""
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Make sure that if we give an URL other than our own host as the next

‎djangosaml2/tests/conf.py

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -19,7 +19,7 @@
1919

2020

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def create_conf(sp_host='sp.example.com', idp_hosts=['idp.example.com'],
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metadata_file='remote_metadata.xml'):
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metadata_file='remote_metadata.xml', authn_requests_signed=None):
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2424
try:
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from saml2.sigver import get_xmlsec_binary
@@ -90,6 +90,9 @@ def create_conf(sp_host='sp.example.com', idp_hosts=['idp.example.com'],
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'valid_for': 24,
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}
9292

93+
if authn_requests_signed is not None:
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config['service']['sp']['authn_requests_signed'] = authn_requests_signed
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9396
for idp in idp_hosts:
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entity_id = 'https://%s/simplesaml/saml2/idp/metadata.php' % idp
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config['service']['sp']['idp'][entity_id] = {

‎djangosaml2/tests/remote_metadata_post_binding.xml

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,33 @@
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<?xml version="1.0"?>
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<md:EntitiesDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
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<md:EntityDescriptor entityID="https://idp.example.com/simplesaml/saml2/idp/metadata.php">
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<md:IDPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
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<md:KeyDescriptor use="signing">
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<ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
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<ds:X509Data>
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<ds:X509Certificate>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</ds:X509Certificate>
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</ds:X509Data>
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</ds:KeyInfo>
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</md:KeyDescriptor>
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<md:KeyDescriptor use="encryption">
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<ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
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<ds:X509Data>
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<ds:X509Certificate>MIICgTCCAeoCCQCbOlrWDdX7FTANBgkqhkiG9w0BAQUFADCBhDELMAkGA1UEBhMCTk8xGDAWBgNVBAgTD0FuZHJlYXMgU29sYmVyZzEMMAoGA1UEBxMDRm9vMRAwDgYDVQQKEwdVTklORVRUMRgwFgYDVQQDEw9mZWlkZS5lcmxhbmcubm8xITAfBgkqhkiG9w0BCQEWEmFuZHJlYXNAdW5pbmV0dC5ubzAeFw0wNzA2MTUxMjAxMzVaFw0wNzA4MTQxMjAxMzVaMIGEMQswCQYDVQQGEwJOTzEYMBYGA1UECBMPQW5kcmVhcyBTb2xiZXJnMQwwCgYDVQQHEwNGb28xEDAOBgNVBAoTB1VOSU5FVFQxGDAWBgNVBAMTD2ZlaWRlLmVybGFuZy5ubzEhMB8GCSqGSIb3DQEJARYSYW5kcmVhc0B1bmluZXR0Lm5vMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDivbhR7P516x/S3BqKxupQe0LONoliupiBOesCO3SHbDrl3+q9IbfnfmE04rNuMcPsIxB161TdDpIesLCn7c8aPHISKOtPlAeTZSnb8QAu7aRjZq3+PbrP5uW3TcfCGPtKTytHOge/OlJbo078dVhXQ14d1EDwXJW1rRXuUt4C8QIDAQABMA0GCSqGSIb3DQEBBQUAA4GBACDVfp86HObqY+e8BUoWQ9+VMQx1ASDohBjwOsg2WykUqRXF+dLfcUH9dWR63CtZIKFDbStNomPnQz7nbK+onygwBspVEbnHuUihZq3ZUdmumQqCw4Uvs/1Uvq3orOo/WJVhTyvLgFVK2QarQ4/67OZfHd7R+POBXhophSMv1ZOo</ds:X509Certificate>
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</ds:X509Data>
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</ds:KeyInfo>
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</md:KeyDescriptor>
19+
<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://idp.example.com/simplesaml/saml2/idp/SingleLogoutService.php"/>
20+
<md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
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<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://idp.example.com/simplesaml/saml2/idp/SSOService.php"/>
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</md:IDPSSODescriptor>
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<md:Organization>
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<md:OrganizationName xml:lang="en">Lorenzo's test IdP</md:OrganizationName>
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<md:OrganizationDisplayName xml:lang="en">idp.example.com IdP</md:OrganizationDisplayName>
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<md:OrganizationURL xml:lang="en">http://idp.example.com/</md:OrganizationURL>
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</md:Organization>
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<md:ContactPerson contactType="technical">
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<md:SurName>Administrator</md:SurName>
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<md:EmailAddress>[email protected]</md:EmailAddress>
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</md:ContactPerson>
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</md:EntityDescriptor>
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</md:EntitiesDescriptor>

‎djangosaml2/tests/utils.py

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@@ -0,0 +1,16 @@
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from html.parser import HTMLParser
2+
3+
4+
class SAMLPostFormParser(HTMLParser):
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"""
6+
Parses the SAML Post binding form page for the SAMLRequest value.
7+
"""
8+
9+
saml_request_value = None
10+
11+
def handle_starttag(self, tag, attrs):
12+
attrs_dict = dict(attrs)
13+
14+
if tag != "input" or attrs_dict.get("name") != "SAMLRequest":
15+
return
16+
self.saml_request_value = attrs_dict.get("value")

‎djangosaml2/views.py

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@@ -44,6 +44,7 @@
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)
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from saml2.mdstore import SourceNotFound
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from saml2.sigver import MissingKey
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from saml2.samlp import AuthnRequest
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from saml2.validate import ResponseLifetimeExceed, ToEarly
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from saml2.xmldsig import ( # support for SHA1 is required by spec
4950
SIG_RSA_SHA1, SIG_RSA_SHA256)
@@ -228,6 +229,9 @@ def login(request,
228229
binding=binding,
229230
**kwargs)
230231
try:
232+
if isinstance(request_xml, AuthnRequest):
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# request_xml will be an instance of AuthnRequest if the message is not signed
234+
request_xml = str(request_xml)
231235
saml_request = base64.b64encode(bytes(request_xml, 'UTF-8')).decode('utf-8')
232236

233237
http_response = render(request, post_binding_form_template, {

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