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#!/usr/bin/python
#
# Copyright (C) 2014 Ipsilon project Contributors, for license see COPYING
import datetime
from ipsilon.tools.certs import Certificate
from lxml import etree
import lasso
SAML2_NAMEID_MAP = {
'email': lasso.SAML2_NAME_IDENTIFIER_FORMAT_EMAIL,
'encrypted': lasso.SAML2_NAME_IDENTIFIER_FORMAT_ENCRYPTED,
'entity': lasso.SAML2_NAME_IDENTIFIER_FORMAT_ENTITY,
'kerberos': lasso.SAML2_NAME_IDENTIFIER_FORMAT_KERBEROS,
'persistent': lasso.SAML2_NAME_IDENTIFIER_FORMAT_PERSISTENT,
'transient': lasso.SAML2_NAME_IDENTIFIER_FORMAT_TRANSIENT,
'unspecified': lasso.SAML2_NAME_IDENTIFIER_FORMAT_UNSPECIFIED,
'windows': lasso.SAML2_NAME_IDENTIFIER_FORMAT_WINDOWS,
'x509': lasso.SAML2_NAME_IDENTIFIER_FORMAT_X509,
}
SAML2_SERVICE_MAP = {
'sso-post': ('SingleSignOnService',
lasso.SAML2_METADATA_BINDING_POST),
'sso-redirect': ('SingleSignOnService',
lasso.SAML2_METADATA_BINDING_REDIRECT),
'sso-soap': ('SingleSignOnService',
lasso.SAML2_METADATA_BINDING_SOAP),
'logout-redirect': ('SingleLogoutService',
lasso.SAML2_METADATA_BINDING_REDIRECT),
'slo-soap': ('SingleLogoutService',
lasso.SAML2_METADATA_BINDING_SOAP),
'response-post': ('AssertionConsumerService',
lasso.SAML2_METADATA_BINDING_POST)
}
EDESC = '{%s}EntityDescriptor' % lasso.SAML2_METADATA_HREF
NSMAP = {
'md': lasso.SAML2_METADATA_HREF,
'ds': lasso.DS_HREF
}
IDPDESC = 'IDPSSODescriptor'
SPDESC = 'SPSSODescriptor'
IDP_ROLE = 'idp'
SP_ROLE = 'sp'
# Expire metadata weekly by default
MIN_EXP_DEFAULT = 7
def mdElement(_parent, _tag, **kwargs):
tag = '{%s}%s' % (lasso.SAML2_METADATA_HREF, _tag)
return etree.SubElement(_parent, tag, **kwargs)
def dsElement(_parent, _tag, **kwargs):
tag = '{%s}%s' % (lasso.DS_HREF, _tag)
return etree.SubElement(_parent, tag, **kwargs)
class Metadata(object):
def __init__(self, role=None, expiration=None):
self.root = etree.Element(EDESC, nsmap=NSMAP)
self.entityid = None
self.role = None
self.set_role(role)
self.set_expiration(expiration)
def set_entity_id(self, url):
self.entityid = url
self.root.set('entityID', url)
def set_role(self, role):
if role is None:
return
elif role == IDP_ROLE:
description = IDPDESC
elif role == SP_ROLE:
description = SPDESC
else:
raise ValueError('invalid role: %s' % role)
self.role = mdElement(self.root, description)
self.role.set('protocolSupportEnumeration', lasso.SAML2_PROTOCOL_HREF)
return self.role
def set_expiration(self, exp):
if exp is None:
self.root.set('cacheDuration', "P%dD" % (MIN_EXP_DEFAULT))
return
elif isinstance(exp, datetime.date):
d = datetime.datetime.combine(exp, datetime.date.min.time())
elif isinstance(exp, datetime.datetime):
d = exp
elif isinstance(exp, datetime.timedelta):
d = datetime.datetime.now() + exp
else:
raise TypeError('Invalid expiration date type')
self.root.set('validUntil', d.isoformat())
def add_cert(self, certdata, use):
desc = mdElement(self.role, 'KeyDescriptor')
desc.set('use', use)
info = dsElement(desc, 'KeyInfo')
data = dsElement(info, 'X509Data')
cert = dsElement(data, 'X509Certificate')
cert.text = certdata
def add_certs(self, signcert=None, enccert=None):
if signcert:
self.add_cert(signcert.get_cert(), 'signing')
if enccert:
self.add_cert(enccert.get_cert(), 'encryption')
def add_service(self, service, location, **kwargs):
svc = mdElement(self.role, service[0])
svc.set('Binding', service[1])
svc.set('Location', location)
for key, value in kwargs.iteritems():
svc.set(key, value)
def add_allowed_name_format(self, name_format):
nameidfmt = mdElement(self.role, 'NameIDFormat')
nameidfmt.text = name_format
def output(self, path=None):
data = etree.tostring(self.root, xml_declaration=True,
encoding='UTF-8', pretty_print=True)
if path is None:
return data
else:
with open(path, 'w') as f:
f.write(data)
if __name__ == '__main__':
import tempfile
import shutil
import os
tmpdir = tempfile.mkdtemp()
try:
# Test IDP generation
sign_cert = Certificate(tmpdir)
sign_cert.generate('idp-signing-cert', 'idp.ipsilon.example.com')
enc_cert = Certificate(tmpdir)
enc_cert.generate('idp-encryption-cert', 'idp.ipsilon.example.com')
idp = Metadata()
idp.set_entity_id('https://ipsilon.example.com/idp/metadata')
idp.set_role(IDP_ROLE)
idp.add_certs(sign_cert, enc_cert)
idp.add_service(SAML2_SERVICE_MAP['sso-post'],
'https://ipsilon.example.com/idp/saml2/POST')
idp.add_service(SAML2_SERVICE_MAP['sso-redirect'],
'https://ipsilon.example.com/idp/saml2/Redirect')
for k in SAML2_NAMEID_MAP:
idp.add_allowed_name_format(SAML2_NAMEID_MAP[k])
md_file = os.path.join(tmpdir, 'metadata.xml')
idp.output(md_file)
with open(md_file) as fd:
text = fd.read()
print '==================== IDP ===================='
print text
print '============================================='
# Test SP generation
sign_cert = Certificate(tmpdir)
sign_cert.generate('sp-signing-cert', 'sp.ipsilon.example.com')
sp = Metadata()
sp.set_entity_id('https://ipsilon.example.com/samlsp/metadata')
sp.set_role(SP_ROLE)
sp.add_certs(sign_cert)
sp.add_service(SAML2_SERVICE_MAP['logout-redirect'],
'https://ipsilon.example.com/samlsp/logout')
sp.add_service(SAML2_SERVICE_MAP['response-post'],
'https://ipsilon.example.com/samlsp/postResponse')
md_file = os.path.join(tmpdir, 'metadata.xml')
sp.output(md_file)
with open(md_file) as fd:
text = fd.read()
print '===================== SP ===================='
print text
print '============================================='
finally:
shutil.rmtree(tmpdir)
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