def test_crypto_backend():
    idpc = IdPConfig()
    idpc.load(IDP_XMLSECURITY)

    assert idpc.crypto_backend == 'XMLSecurity'
    sec = security_context(idpc)
    assert isinstance(sec.crypto, CryptoBackendXMLSecurity)

def test_idp_1():
    c = IdPConfig().load(IDP1)
    c.context = "idp"

    print c
    assert c.endpoint("single_sign_on_service")[0] == 'http://localhost:8088/'

    attribute_restrictions = c.getattr("policy","idp").get_attribute_restriction("")
    assert attribute_restrictions["eduPersonAffiliation"][0].match("staff")

class SamlServer(object):
    """
    SAML Wrapper around pysaml2.

    Implements SAML2 Identity Provider functionality for Flask.
    """
    def __init__(self, config, attribute_map=None):
        """Initialize SAML Identity Provider.

        Args:
            config (dict): Identity Provider config info in dict form
            attribute_map (dict): Mapping of attribute keys to user data
        """
        self._config = IdPConfig()
        self._config.load(config)
        self._server = Server(config=self._config)
        self.attribute_map = {}
        if attribute_map is not None:
            self.attribute_map = attribute_map

    def handle_authn_request(self, request, login_form_cb):
        """Handles authentication request.

        TODO: create default login_form_cb, with unstyled login form?

        Args:
            request (Request): Flask request object for this HTTP transaction.
            login_form_cb (function): Function that displays login form with 
                username and password fields. Takes a single parameter which
                is the service_provider_id so the form may be styled accordingly.
        """
        if 'SAMLRequest' in request.values:
            details = self._server.parse_authn_request(request.details,
                BINDING_HTTP_REDIRECT)
            # TODO: check session for already authenticated user
            # and send authn_response immediately.
            # TODO: otherwise render login form login_form_cb(service_provider_id)
        else:
            pass # TODO: bad request?

    def get_service_provider_id(self, request):
        # TODO: pull service_provider_id from session
        pass

    def authn_response(self, userid):
        service_provider_id = get_service_provider_id()
        # TODO: send authn_response
        pass

    def get_metadata(self):
        """Returns SAML Identity Provider Metadata"""
        edesc = entity_descriptor(self._config, 24)
        if self._config.key_file:
            edesc = sign_entity_descriptor(edesc, 24, None, security_context(self._config))
        response = make_response(str(edesc))
        response.headers['Content-type'] = 'text/xml; charset=utf-8'
        return response

def test_idp_2():
    c = IdPConfig().load(IDP2)
    c.context = "idp"

    print(c)
    assert c.endpoint("single_logout_service", BINDING_SOAP) == []
    assert c.endpoint("single_logout_service", BINDING_HTTP_REDIRECT) == ["http://localhost:8088/"]

    attribute_restrictions = c.getattr("policy", "idp").get_attribute_restrictions("")
    assert attribute_restrictions["edupersonaffiliation"][0].match("staff")

def test_assertion_consumer_service():
    c = IdPConfig()
    c.load_file(dotname("idp_conf"))
    c.context = "idp"

    c.metadata.load("local", full_path("InCommon-metadata.xml"))

    entity_id = "https://www.zimride.com/shibboleth"
    acs = c.metadata.assertion_consumer_service(entity_id)
    assert len(acs) == 1
    assert acs[0]["location"] == 'https://www.zimride.com/Shibboleth.sso/SAML2/POST'

def test_assertion_consumer_service():
    c = IdPConfig()
    c.load_file("idp_conf")
    c.context = "idp"

    xml_src = open("inCommon-metadata.xml").read()
    # A trick so outdated data is allowed
    c.metadata.import_metadata(xml_src, "-")

    print c.metadata.entity.keys()
    entity_id = "https://www.zimride.com/shibboleth"
    acs = c.assertion_consumer_services(entity_id)
    assert len(acs) == 1
    assert acs[0].location == 'https://www.zimride.com/Shibboleth.sso/SAML2/POST'

def create_authn_response(session_id, identity=dict(), sign=True):
    config = IdPConfig()
    config.load(idp_config)
    idp_server = Server(config=config)
    idp_server.ident = Identifier(auth.AuthDictCache(dict(), '_ident'))
    authn_response = str(idp_server.authn_response(
        identity=identity,
        in_response_to=session_id,
        destination='https://foo.example.com/sp/acs',
        sp_entity_id='https://foo.example.com/sp/metadata',
        name_id_policy=None,
        userid='Irrelevent',
        sign=sign,
        instance=True))
    response = samlp.response_from_string(authn_response)
    return response.assertion[0].subject.name_id.text, authn_response

def auth_response(identity, in_response_to, sp_conf):
    """Generates a fresh signed authentication response"""
    sp_entity_id = sp_conf.entityid
    idp_entity_id = sp_conf.idps().keys()[0]
    acs = sp_conf.endpoint('assertion_consumer_service')[0]
    issuer = saml.Issuer(text=idp_entity_id, format=saml.NAMEID_FORMAT_ENTITY)
    response = response_factory(issuer=issuer,
                                in_response_to=in_response_to,
                                destination=acs,
                                status=success_status_factory())
    idp_conf = IdPConfig()
    name_form = "urn:oasis:names:tc:SAML:2.0:attrname-format:uri"
    idp_conf.load({
            'entityid': idp_entity_id,
            'xmlsec_binary': sp_conf.xmlsec_binary,
            'attribute_map_dir': os.path.join(BASEDIR, 'attribute-maps'),
            'service': {
                'idp': {
                    'endpoints': tuple(),
                    'policy':  {
                        'default': {
                            "lifetime": {"minutes": 15},
                            "attribute_restrictions": None,
                            "name_form": name_form,
                            }
                        }
                    },
                },
            'key_file': os.path.join(BASEDIR, 'idpcert.key'),
            'cert_file': os.path.join(BASEDIR, 'idpcert.pem'),
            'metadata': {
                'local': [os.path.join(BASEDIR, 'sp_metadata.xml')],
                },
            })
    server = Server("", idp_conf)
    server.ident = Identifier(FakeDb())

    userid = 'irrelevant'
    response = server.authn_response(identity, in_response_to, acs,
                                     sp_entity_id, None, userid)
    return '\n'.join(response)

def _parse_metadata_dict_to_inline(metadata):
    """Convert any metadata included as dict to PySAML2's `inline` type.

    Currently PySAML supports remote, local files, and string IdP metadata to
    be included in the SP config dict as XML. It is also possible to pull your
    IdP metadata from local JSON files (the format of the JSON is nearly
    unparsable for any normal human).

    This function adds the ability to include the IdP metadata directly in the
    SP config as a dict of IdP attributes by hacking around this PySAML2
    limitation and converting the dict into XML via PySAML2's IdPConfig class.

    Note: In the process of trying to find an alternative which will allow us
        to NOT be hacking around PySAML so rudely in order to load IdP metadata
        from a Python dict. https://github.com/rohe/pysaml2/issues/172

    Args:
        metadata (dict): The IdP metadata this SP is configured for.

    Returns:
        (dict) config where any metadata `inline_dict` data has been
            converted to `inline` XML.
    """
    if metadata.get('inline_dict', None):
        metadata['inline'] = metadata.get('inline', [])
        for _idp in metadata.get('inline_dict'):
            idp_config = IdPConfig()
            idp_config.load(_idp)
            entity_desc = entity_descriptor(idp_config)
            # Hack for supporting multiple certificates.
            if _idp.get('certs'):
                # `certs` config directive overrides `cert_file`.
                entity_desc.idpsso_descriptor.key_descriptor = \
                    _parse_key_descriptors(_idp['certs'])
            idp_metadata_str = str(entity_desc)
            LOGGER.debug("IdP XML Metadata for %s: %s",
                         _idp['entityid'], idp_metadata_str)
            metadata['inline'].append(idp_metadata_str)
        del metadata['inline_dict']
    return metadata

    def __init__(self, config, attribute_map=None):
        """Initialize SAML Identity Provider.

        Args:
            config (dict): Identity Provider config info in dict form
            attribute_map (dict): Mapping of attribute keys to user data
        """
        self._config = IdPConfig()
        self._config.load(config)
        self._server = Server(config=self._config)
        self.attribute_map = {}
        if attribute_map is not None:
            self.attribute_map = attribute_map

def create_logout_response(subject_id, destination, issuer_entity_id,
        req_entity_id, sign=True):
    config = IdPConfig()
    config.load(idp_config)
    idp_server = Server(config=config)
    # construct a request
    logout_request = create_logout_request(
        subject_id=subject_id,
        destination=destination,
        issuer_entity_id=issuer_entity_id,
        req_entity_id=req_entity_id)
    #idp_server.ident = Identifier(auth.AuthDictCache(dict(), '_ident'))
    resp, headers, message = idp_server.logout_response(
        request=logout_request,
        bindings=[BINDING_HTTP_REDIRECT],
        sign=sign)
    location = dict(headers).get('Location')
    url = urlparse.urlparse(location)
    params = urlparse.parse_qs(url.query)
    logout_response_xml = decode_base64_and_inflate(params['SAMLResponse'][0])
    response = samlp.logout_response_from_string(logout_response_xml)
    return response.in_response_to, logout_response_xml

def saml_redirect(request, sp_name, ms):
    '''
    Redirect to a saml sp acs
    '''
    # ** Init SAML IDP
    setting = get_saml_setting(sp_name)

    conf = IdPConfig()
    conf.load(copy.deepcopy(setting))

    IDP = server.Server(config=conf, cache=Cache())
    IDP.ticket = {}

    # ** Get sp entity id from sp.xml
    entity_id = IDP.metadata.keys()[0]

    # ** Get binding and acs destination
    # pass bindings=None, correct?
    binding, destination = IDP.pick_binding("assertion_consumer_service", entity_id=entity_id)

    authn = {'class_ref': 'urn:oasis:names:tc:SAML:2.0:ac:classes:Password'}

    # ** Prepare attributes
    attribute_setting = ms.get('attributes')
    parsed_data = {}
    for attr in attribute_setting:
        if not attr['name']:
            continue

        mapped_name = attr['map'] if 'map' in attr else attr['name']
        value = None

        try:
            if attr['name'] == "email":
                value = request.user.email
            if attr['name'] == "first_name":
                value = request.user.first_name
            elif attr['name'] == "last_name":
                value = request.user.last_name
            elif attr['name'] == "username":
                value = request.user.username
            elif attr['name'] == "state":
                value = request.user.profile.district.state.name
            elif attr['name'] == "district":
                value = request.user.profile.district.name
            elif attr['name'] == "school":
                value = request.user.profile.school.name
            elif attr['name'] == "grades":
                value = request.user.profile.grade_level_id
            elif attr['name'] == "bio":
                value = request.user.profile.bio
            elif attr['name'] == "internal_id":
                value = str(request.user.id)
            elif attr['name'] == "avatar":
                value = request.build_absolute_uri(reverse('user_photo', args=[request.user.id]))
        except:
            value = None
        if value is not None:
            parsed_data[mapped_name] = [value]
        else:
            parsed_data[mapped_name] = ['']


    # ** Get the X509Certificate string from sp.xml
    sign = IDP.metadata.certs(entity_id, "any", "signing")

    # ** Create authn response
    identity = parsed_data
    resp = IDP.create_authn_response(
        issuer=setting.get('entityid'),  # "https://localhost:8088/idp.xml",
        identity=identity,
        sign_response=sign,
        sign_assertion=sign,
        in_response_to=None,
        destination=destination,
        sp_entity_id=entity_id,
        name_id_policy=None,             # "urn:oasis:names:tc:SAML:2.0:nameid-format:transient"
        authn=authn,
        encrypt_cert="",
        encrypt_assertion="",
        # userid="%s" % request.user.id,
        )

    # ** Translate to http response
    http_args = IDP.apply_binding(
        binding=binding,
        msg_str=resp,
        destination=destination,
        relay_state="",
        response=True)

    resp = "\n".join(http_args["data"])
    resp = resp.replace("<body>", "<body style='display:none'>")
    return HttpResponse(resp)