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Add method verify_logout_request #7

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Merged
evgenyfadeev merged 3 commits into from
Jan 19, 2018
Merged

Add method verify_logout_request #7

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6e68475
Add method verify_logout_request
divad Jun 8, 2017
c5f16e5
Update cas.py
divad Jan 19, 2018
d0d2de5
Update cas.py
divad Jan 19, 2018
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19 changes: 17 additions & 2 deletions cas.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
from six.moves.urllib import parse as urllib_parse
from uuid import uuid4
import datetime
from lxml import etree


class CASError(ValueError):
Expand All @@ -12,14 +13,28 @@ class SingleLogoutMixin(object):
@classmethod
def get_saml_slos(cls, logout_request):
"""returns saml logout ticket info"""
from lxml import etree
try:
root = etree.fromstring(logout_request)
return root.xpath(
"//samlp:SessionIndex",
namespaces={'samlp': "urn:oasis:names:tc:SAML:2.0:protocol"})
except etree.XMLSyntaxError:
pass
return None

@classmethod
def verify_logout_request(cls, logout_request, ticket):
"""verifies the single logout request came from the CAS server
returns True if the logout_request is valid, False otherwise
"""
try:
session_index = cls.get_saml_slos(logout_request)
session_index = session_index[0].text
if session_index == ticket:
return True
else:
return False
except (AttributeError, IndexError):
return False


class CASClient(object):
Expand Down