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#!/usr/bin/env python
import base64
from saml2.xmldsig import SIG_RSA_SHA256
from saml2 import sigver
from saml2 import extension_elements_to_elements
from saml2 import class_name
from saml2 import time_util
from saml2 import saml, samlp
from saml2 import config
from saml2.sigver import pre_encryption_part
from saml2.sigver import make_temp
from saml2.sigver import XmlsecError
from saml2.sigver import SigverError
from saml2.mdstore import MetadataStore
from saml2.saml import assertion_from_string
from saml2.saml import EncryptedAssertion
from saml2.samlp import response_from_string
from saml2.s_utils import factory, do_attribute_statement
import pytest
from py.test import raises
from pathutils import full_path
SIGNED = full_path("saml_signed.xml")
UNSIGNED = full_path("saml_unsigned.xml")
SIMPLE_SAML_PHP_RESPONSE = full_path("simplesamlphp_authnresponse.xml")
PUB_KEY = full_path("test.pem")
PRIV_KEY = full_path("test.key")
ENC_PUB_KEY = full_path("pki/test_1.crt")
ENC_PRIV_KEY = full_path("pki/test.key")
def _eq(l1, l2):
return set(l1) == set(l2)
CERT1 = """MIICsDCCAhmgAwIBAgIJAJrzqSSwmDY9MA0GCSqGSIb3DQEBBQUAMEUxCzAJBgNV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"""
CERT_SSP = """MIICizCCAfQCCQCY8tKaMc0BMjANBgkqhkiG9w0BAQUFADCBiTELMAkGA1UEBhMC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"""
try:
from pyasn1.codec.der import decoder
except ImportError:
decoder = None
def test_cert_from_instance_1():
xml_response = open(SIGNED).read()
response = samlp.response_from_string(xml_response)
assertion = response.assertion[0]
certs = sigver.cert_from_instance(assertion)
assert len(certs) == 1
print(certs[0])
assert certs[0] == CERT1
@pytest.mark.skipif(not decoder,
reason="pyasn1 is not installed")
def test_cert_from_instance_ssp():
xml_response = open(SIMPLE_SAML_PHP_RESPONSE).read()
response = samlp.response_from_string(xml_response)
assertion = response.assertion[0]
certs = sigver.cert_from_instance(assertion)
assert len(certs) == 1
assert certs[0] == CERT_SSP
der = base64.b64decode(certs[0])
print(str(decoder.decode(der)).replace('.', "\n."))
assert decoder.decode(der)
class FakeConfig():
"""
Configuration parameters for signature validation test cases.
"""
xmlsec_binary = None
crypto_backend = 'xmlsec1'
only_use_keys_in_metadata = False
metadata = None
cert_file = PUB_KEY
key_file = PRIV_KEY
encryption_keypairs = [{"key_file": ENC_PRIV_KEY, "cert_file": ENC_PUB_KEY}]
enc_key_files = [ENC_PRIV_KEY]
debug = False
cert_handler_extra_class = None
generate_cert_func = None
generate_cert_info = False
tmp_cert_file = None
tmp_key_file = None
validate_certificate = False
def getattr(self, attr, default):
return getattr(self, attr, default)
class TestSecurity():
def setup_class(self):
# This would be one way to initialize the security context :
#
# conf = config.SPConfig()
# conf.load_file("server_conf")
# conf.only_use_keys_in_metadata = False
#
# but instead, FakeConfig() is used to really only use the minimal
# set of parameters needed for these test cases. Other test cases
# (TestSecurityMetadata below) excersise the SPConfig() mechanism.
#
conf = FakeConfig()
self.sec = sigver.security_context(FakeConfig())
self._assertion = factory(
saml.Assertion,
version="2.0",
id="11111",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11111", self.sec.my_cert, 1),
attribute_statement=do_attribute_statement({
("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""),
})
)
def test_verify_1(self):
xml_response = open(SIGNED).read()
response = self.sec.correctly_signed_response(xml_response)
assert response
def test_non_verify_1(self):
""" unsigned is OK """
xml_response = open(UNSIGNED).read()
response = self.sec.correctly_signed_response(xml_response)
assert response
def test_sign_assertion(self):
ass = self._assertion
print(ass)
sign_ass = self.sec.sign_assertion("%s" % ass, node_id=ass.id)
#print(sign_ass)
sass = saml.assertion_from_string(sign_ass)
#print(sass)
assert _eq(sass.keyswv(), ['attribute_statement', 'issue_instant',
'version', 'signature', 'id'])
assert sass.version == "2.0"
assert sass.id == "11111"
assert time_util.str_to_time(sass.issue_instant)
print("Crypto version : %s" % (self.sec.crypto.version()))
item = self.sec.check_signature(sass, class_name(sass), sign_ass)
assert isinstance(item, saml.Assertion)
def test_multiple_signatures_assertion(self):
ass = self._assertion
# basic test with two of the same
to_sign = [(ass, ass.id, ''),
(ass, ass.id, '')
]
sign_ass = self.sec.multiple_signatures("%s" % ass, to_sign)
sass = saml.assertion_from_string(sign_ass)
assert _eq(sass.keyswv(), ['attribute_statement', 'issue_instant',
'version', 'signature', 'id'])
assert sass.version == "2.0"
assert sass.id == "11111"
assert time_util.str_to_time(sass.issue_instant)
print("Crypto version : %s" % (self.sec.crypto.version()))
item = self.sec.check_signature(sass, class_name(sass),
sign_ass, must=True)
assert isinstance(item, saml.Assertion)
def test_multiple_signatures_response(self):
response = factory(samlp.Response,
assertion=self._assertion,
id="22222",
signature=sigver.pre_signature_part(
"22222", self.sec.my_cert))
# order is important, we can't validate if the signatures are made
# in the reverse order
to_sign = [(self._assertion, self._assertion.id, ''),
(response, response.id, '')]
s_response = self.sec.multiple_signatures("%s" % response, to_sign)
assert s_response is not None
response = response_from_string(s_response)
item = self.sec.check_signature(response, class_name(response),
s_response, must=True)
assert item == response
assert item.id == "22222"
s_assertion = item.assertion[0]
assert isinstance(s_assertion, saml.Assertion)
# make sure the assertion was modified when we supposedly signed it
assert s_assertion != self._assertion
ci = "".join(sigver.cert_from_instance(s_assertion)[0].split())
assert ci == self.sec.my_cert
res = self.sec.check_signature(s_assertion, class_name(s_assertion),
s_response, must=True)
assert res == s_assertion
assert s_assertion.id == "11111"
assert s_assertion.version == "2.0"
assert _eq(s_assertion.keyswv(), ['attribute_statement',
'issue_instant',
'version', 'signature', 'id'])
def test_sign_response(self):
response = factory(samlp.Response,
assertion=self._assertion,
id="22222",
signature=sigver.pre_signature_part("22222",
self.sec
.my_cert))
to_sign = [(class_name(self._assertion), self._assertion.id),
(class_name(response), response.id)]
s_response = sigver.signed_instance_factory(response, self.sec, to_sign)
assert s_response is not None
print(s_response)
response = response_from_string(s_response)
sass = response.assertion[0]
print(sass)
assert _eq(sass.keyswv(), ['attribute_statement', 'issue_instant',
'version', 'signature', 'id'])
assert sass.version == "2.0"
assert sass.id == "11111"
item = self.sec.check_signature(response, class_name(response),
s_response)
assert isinstance(item, samlp.Response)
assert item.id == "22222"
def test_sign_response_2(self):
assertion2 = factory(saml.Assertion,
version="2.0",
id="11122",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11122",
self.sec
.my_cert),
attribute_statement=do_attribute_statement({
("", "", "surName"): ("Fox", ""),
("", "", "givenName"): ("Bear", ""),
})
)
response = factory(samlp.Response,
assertion=assertion2,
id="22233",
signature=sigver.pre_signature_part("22233",
self.sec
.my_cert))
to_sign = [(class_name(assertion2), assertion2.id),
(class_name(response), response.id)]
s_response = sigver.signed_instance_factory(response, self.sec, to_sign)
assert s_response is not None
response2 = response_from_string(s_response)
sass = response2.assertion[0]
assert _eq(sass.keyswv(), ['attribute_statement', 'issue_instant',
'version', 'signature', 'id'])
assert sass.version == "2.0"
assert sass.id == "11122"
item = self.sec.check_signature(response2, class_name(response),
s_response)
assert isinstance(item, samlp.Response)
def test_sign_verify(self):
response = factory(samlp.Response,
assertion=self._assertion,
id="22233",
signature=sigver.pre_signature_part("22233",
self.sec
.my_cert))
to_sign = [(class_name(self._assertion), self._assertion.id),
(class_name(response), response.id)]
s_response = sigver.signed_instance_factory(response, self.sec,
to_sign)
print(s_response)
res = self.sec.verify_signature(s_response,
node_name=class_name(samlp.Response()))
print(res)
assert res
def test_sign_verify_with_cert_from_instance(self):
response = factory(samlp.Response,
assertion=self._assertion,
id="22222",
signature=sigver.pre_signature_part("22222",
self.sec
.my_cert))
to_sign = [(class_name(self._assertion), self._assertion.id),
(class_name(response), response.id)]
s_response = sigver.signed_instance_factory(response, self.sec, to_sign)
response2 = response_from_string(s_response)
ci = "".join(sigver.cert_from_instance(response2)[0].split())
assert ci == self.sec.my_cert
res = self.sec.verify_signature(s_response,
node_name=class_name(samlp.Response()))
assert res
res = self.sec._check_signature(s_response, response2,
class_name(response2), s_response)
assert res == response2
def test_sign_verify_assertion_with_cert_from_instance(self):
assertion = factory(saml.Assertion,
version="2.0",
id="11100",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11100",
self.sec
.my_cert),
attribute_statement=do_attribute_statement({
("", "", "surName"): ("Fox", ""),
("", "", "givenName"): ("Bear", ""),
})
)
to_sign = [(class_name(assertion), assertion.id)]
s_assertion = sigver.signed_instance_factory(assertion, self.sec,
to_sign)
print(s_assertion)
ass = assertion_from_string(s_assertion)
ci = "".join(sigver.cert_from_instance(ass)[0].split())
assert ci == self.sec.my_cert
res = self.sec.verify_signature(s_assertion,
node_name=class_name(ass))
assert res
res = self.sec._check_signature(s_assertion, ass, class_name(ass))
assert res
def test_exception_sign_verify_with_cert_from_instance(self):
assertion = factory(saml.Assertion,
version="2.0",
id="11100",
issue_instant="2009-10-30T13:20:28Z",
#signature= sigver.pre_signature_part("11100",
# self.sec.my_cert),
attribute_statement=do_attribute_statement({
("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""),
})
)
response = factory(samlp.Response,
assertion=assertion,
id="22222",
signature=sigver.pre_signature_part("22222",
self.sec
.my_cert))
to_sign = [(class_name(response), response.id)]
s_response = sigver.signed_instance_factory(response, self.sec, to_sign)
response2 = response_from_string(s_response)
# Change something that should make everything fail
response2.id = "23456"
raises(sigver.SignatureError, self.sec._check_signature,
s_response, response2, class_name(response2))
class TestSecurityMetadata():
def setup_class(self):
conf = config.SPConfig()
conf.load_file("server_conf")
md = MetadataStore([saml, samlp], None, conf)
md.load("local", full_path("metadata_cert.xml"))
conf.metadata = md
conf.only_use_keys_in_metadata = False
self.sec = sigver.security_context(conf)
assertion = factory(
saml.Assertion, version="2.0", id="11111",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11111", self.sec.my_cert, 1),
attribute_statement=do_attribute_statement(
{("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""), })
)
def test_xbox():
conf = config.SPConfig()
conf.load_file("server_conf")
md = MetadataStore([saml, samlp], None, conf)
md.load("local", full_path("idp_example.xml"))
conf.metadata = md
conf.only_use_keys_in_metadata = False
sec = sigver.security_context(conf)
assertion = factory(
saml.Assertion, version="2.0", id="11111",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11111", sec.my_cert, 1),
attribute_statement=do_attribute_statement(
{("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""), })
)
sigass = sec.sign_statement(assertion, class_name(assertion),
key_file=full_path("test.key"),
node_id=assertion.id)
_ass0 = saml.assertion_from_string(sigass)
encrypted_assertion = EncryptedAssertion()
encrypted_assertion.add_extension_element(_ass0)
_, pre = make_temp(str(pre_encryption_part()).encode('utf-8'), decode=False)
enctext = sec.crypto.encrypt(
str(encrypted_assertion), conf.cert_file, pre, "des-192",
'/*[local-name()="EncryptedAssertion"]/*[local-name()="Assertion"]')
decr_text = sec.decrypt(enctext)
_seass = saml.encrypted_assertion_from_string(decr_text)
assertions = []
assers = extension_elements_to_elements(_seass.extension_elements,
[saml, samlp])
sign_cert_file = full_path("test.pem")
for ass in assers:
_ass = "%s" % ass
#_ass = _ass.replace('xsi:nil="true" ', '')
#assert sigass == _ass
_txt = sec.verify_signature(_ass, sign_cert_file,
node_name=class_name(assertion))
if _txt:
assertions.append(ass)
print(assertions)
def test_xmlsec_err():
conf = config.SPConfig()
conf.load_file("server_conf")
md = MetadataStore([saml, samlp], None, conf)
md.load("local", full_path("idp_example.xml"))
conf.metadata = md
conf.only_use_keys_in_metadata = False
sec = sigver.security_context(conf)
assertion = factory(
saml.Assertion, version="2.0", id="11111",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11111", sec.my_cert, 1),
attribute_statement=do_attribute_statement(
{("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""), })
)
try:
sec.sign_statement(assertion, class_name(assertion),
key_file=full_path("tes.key"),
node_id=assertion.id)
except (XmlsecError, SigverError) as err: # should throw an exception
pass
else:
assert False
def test_sha256_signing():
conf = config.SPConfig()
conf.load_file("server_conf")
md = MetadataStore([saml, samlp], None, conf)
md.load("local", full_path("idp_example.xml"))
conf.metadata = md
conf.only_use_keys_in_metadata = False
sec = sigver.security_context(conf)
assertion = factory(
saml.Assertion, version="2.0", id="11111",
issue_instant="2009-10-30T13:20:28Z",
signature=sigver.pre_signature_part("11111", sec.my_cert, 1,
sign_alg=SIG_RSA_SHA256),
attribute_statement=do_attribute_statement(
{("", "", "surName"): ("Foo", ""),
("", "", "givenName"): ("Bar", ""), })
)
s = sec.sign_statement(assertion, class_name(assertion),
key_file=full_path("test.key"),
node_id=assertion.id)
assert s
def test_xmlsec_output_line_parsing():
output1 = "prefix\nOK\npostfix"
assert sigver.parse_xmlsec_output(output1)
output2 = "prefix\nFAIL\npostfix"
raises(sigver.XmlsecError, sigver.parse_xmlsec_output, output2)
output3 = "prefix\r\nOK\r\npostfix"
assert sigver.parse_xmlsec_output(output3)
output4 = "prefix\r\nFAIL\r\npostfix"
raises(sigver.XmlsecError, sigver.parse_xmlsec_output, output4)
if __name__ == "__main__":
# t = TestSecurity()
# t.setup_class()
# t.test_sign_assertion()
test_sha256_signing()
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