class StartServiceLinking(Resource):
def __init__(self):
super(StartServiceLinking, self).__init__()
self.helpers = Helpers(current_app.config)
self.service_key = self.helpers.get_key()
self.is_sink = current_app.config["IS_SINK"]
self.is_source = current_app.config["IS_SOURCE"]
self.service_url = current_app.config["SERVICE_URL"]
self.operator_url = current_app.config["OPERATOR_URL"]
self.lock_wait_time = current_app.config["LOCK_WAIT_TIME"]
self.parser = reqparse.RequestParser()
self.parser.add_argument('code', type=str, help='session code')
self.parser.add_argument('operator_id', type=str, help='Operator UUID.')
self.parser.add_argument('return_url', type=str, help='Url safe Base64 coded return url.')
self.parser.add_argument('surrogate_id', type=str, help="surrogate ID")
# TODO: Verify service_id is unnecessary.
#self.parser.add_argument('service_id', type=str, help="Service's ID") # Seems unnecessary to the flow.
@error_handler
@api_logging
def post(self):
args = self.parser.parse_args()
debug_log.debug("StartServiceLinking got parameter:\n {}".format(args))
data = {"surrogate_id": args["surrogate_id"], "code": args["code"]}
sq.task("Link code to generated surrogate_id")
self.helpers.add_code_to_surrogate_id(args["code"], args["surrogate_id"])
if self.is_sink:
data["token_key"] = self.service_key["pub"] # TODO: Are we implementing according to 1.3 in such way that we have
# operator, service, user specific pop keys?
sq.send_to("Operator_Components Mgmnt", "Send Operator_Components request to make SLR")
endpoint = "/api/1.3/slr/link" # Todo: this needs to be fetched from somewhere
result = post("{}{}".format(self.operator_url, endpoint), json=data)
debug_log.info("####slr/link reply from operator: {}\n{}".format(result.status_code, result.text))
if result.ok:
self.helpers.delete_session(args["code"])
return result.text, 201
elif result.status_code == 500:
self.helpers.delete_session(args["code"])
raise DetailedHTTPException(status=500,
detail={"msg": "Linking Service has failed due to server side issue."},
title="Could not link Service.")
else:
self.helpers.delete_session(args["code"])
raise DetailedHTTPException(status=result.status_code,
detail={
"msg": "Something went wrong while posting to Operator_SLR for /link",
"Error from Operator_SLR": loads(result.text)},
title=result.reason)
class GenerateSurrogateId(Resource):
def __init__(self):
super(GenerateSurrogateId, self).__init__()
keysize = current_app.config["KEYSIZE"]
cert_key_path = current_app.config["CERT_KEY_PATH"]
self.helpers = Helpers(current_app.config)
self.service_key = self.helpers.get_key()
self.is_sink = current_app.config["IS_SINK"]
self.is_source = current_app.config["IS_SOURCE"]
self.service_id = current_app.config["SERVICE_ID"]
self.service_url = current_app.config["SERVICE_URL"]
self.operator_url = current_app.config["OPERATOR_URL"]
self.lock_wait_time = current_app.config["LOCK_WAIT_TIME"]
@timeme
@error_handler
@api_logging
def post(self):
try:
# TODO: Verify this requests comes from Service Mockup(Is this our responsibility?)
# This is now the point we want to double check that similar flow is not going on already for said user.
user_id = request.json["user_id"]
operator_id = request.json["operator_id"]
sq.task("Checking if user_id is locked already.")
user_is_locked = self.helpers.check_lock(user_id)
if user_is_locked:
time.sleep(self.lock_wait_time)
user_is_locked = self.helpers.check_lock(user_id)
if user_is_locked:
raise DetailedHTTPException(status=503,
detail={"msg": "Another SLR linking is in process, please try again once "
"linking is over"},
title="User_id locked for SLR creation.")
else:
sq.task("Locking user_id.")
self.helpers.lock_user(user_id)
sq.task("Generate surrogate_id.")
# TODO: Some logic to surrogate_id's?
# surrogate_id is meant to be unique between operator and service.
surrogate_id = sha256("{}_{}_{}".format(self.service_id, user_id, operator_id)).hexdigest()
# Store surrogate_id to database
self.helpers.add_surrogate_id_to_user_id(user_id, surrogate_id)
sq.send_to("Service_Mockup", "Send surrogate_id to Service_Mockup")
content_json = {"surrogate_id": surrogate_id}
return content_json, 201
except DetailedHTTPException as e:
debug_log.exception(e)
self.helpers.delete_session(user=user_id)
e.trace = traceback.format_exc(limit=100).splitlines()
raise e
except Exception as e:
debug_log.exception(e)
self.helpers.delete_session(user=user_id)
raise DetailedHTTPException(exception=e,
detail="Something failed in generating and delivering Surrogate_ID.",
trace=traceback.format_exc(limit=100).splitlines())
class StoreSLR(Resource):
def __init__(self):
super(StoreSLR, self).__init__()
config = current_app.config
keysize = config["KEYSIZE"]
cert_key_path = config["CERT_KEY_PATH"]
self.helpers = Helpers(config)
self.service_key = self.helpers.get_key()
self.protti = self.service_key["prot"]
self.headeri = self.service_key["header"]
self.service_url = config["SERVICE_URL"]
self.operator_url = config["OPERATOR_URL"]
@timeme
@error_handler
@api_logging
def post(self):
def decode_payload(payload):
sq.task("Fix possible incorrect padding in payload")
payload += '=' * (-len(payload) % 4) # Fix incorrect padding of base64 string.
debug_log.info("After padding fix :{}".format(payload))
sq.task("Decode SLR payload and store it into object")
debug_log.info(payload.encode())
content = decode(payload.encode())
sq.task("Load decoded payload as python dict")
payload = loads(content.decode("utf-8"))
debug_log.info("Decoded SLR payload:")
debug_log.info(type(payload))
debug_log.info(dumps(payload, indent=2))
return payload
try:
sq.task("Load SLR to object")
slr = request.json["slr"]
debug_log.info("SLR STORE:\n", slr)
sq.task("Load slr payload as object")
payload = slr["payload"]
debug_log.info("Before padding fix:{}".format(payload))
payload = decode_payload(payload)
sq.task("Fetch surrogate_id from decoded SLR payload")
surrogate_id = payload["surrogate_id"].encode()
sq.task("Load code from json payload")
code = request.json["data"]["code"].encode()
debug_log.info("SLR payload contained code: {}".format(code))
sq.task("Verify surrogate_id and code")
debug_log.info("Surrogate {} has been verified for code {}.".format(self.helpers.verifySurrogate(code, surrogate_id), code))
except Exception as e:
raise DetailedHTTPException(title="Verifying Surrogate ID failed",
exception=e,
trace=traceback.format_exc(limit=100).splitlines())
try:
sq.task("Create empty JSW object")
jwssa = jws.JWS()
debug_log.info("SLR Received:\n"+(dumps(slr, indent=2)))
sq.task("Deserialize slr to JWS object created before")
jwssa.deserialize(dumps(slr))
sq.task("Load JWK used to sign JWS from the slr payload's cr_keys field into an object")
sign_key = jwk.JWK(**payload["cr_keys"][0])
sq.task("Verify SLR was signed using the key shipped with it")
debug_log.info(self.helpers.verifyJWS(slr))
verify = jwssa.verify(sign_key) # Verifying changes the state of this object
except Exception as e:
raise DetailedHTTPException(title="Verifying JWS signature failed",
exception=e,
trace=traceback.format_exc(limit=100).splitlines())
try:
sq.task("Fix possible serialization errors in JWS")
faulty_JSON = loads(jwssa.serialize(compact=False)) # For some reason serialization messes up "header" from "header": {} to "header": "{}"
faulty_JSON["header"] = faulty_JSON["header"]
sq.task("Add our signature in the JWS")
key = jwk.JWK(**self.service_key["key"])
jwssa.add_signature(key, header=dumps(self.headeri), protected=dumps(self.protti))
sq.task("Fix possible header errors")
fixed = header_fix(loads(jwssa.serialize(compact=False)))
debug_log.info("{}\n{}\n{}".format("Verified and Signed Signature:\n", dumps(fixed, indent=3),
"\n###### END OF SIGNATURE #######"))
sq.task("Create template for verifying JWS at Operator_Components")
req = {"data": {"code": code}, "slr": fixed}
debug_log.info(dumps(req, indent=2))
except Exception as e:
raise DetailedHTTPException(exception=e,
title="JWS fix and subsequent signing of JWS with out key failed.",
trace=traceback.format_exc(limit=100).splitlines())
sq.send_to("Operator_Components Mgmnt", "Verify SLR(JWS)")
endpoint = "/api/1.3/slr/verify"
result = post("{}{}".format(self.operator_url, endpoint), json=req)
debug_log.info("Sent SLR to Operator for verification, results:")
debug_log.info("status code:{}\nreason: {}\ncontent: {}".format(result.status_code, result.reason, result.content))
if result.ok:
sq.task("Store following SLR into db")
store = loads(result.text)
slr_store = loads(result.text)["data"]["slr"]
ssr_store = loads(result.text)["data"]["ssr"]
debug_log.debug("Storing following SLR and SSR:")
debug_log.debug(dumps(slr_store, indent=2))
debug_log.debug(dumps(ssr_store, indent=2))
payload = decode_payload(slr_store["attributes"]["payload"])
if surrogate_id == payload["surrogate_id"]:
self.helpers.store_slr_JSON(json=slr_store, slr_id=payload["link_id"], surrogate_id=payload["surrogate_id"])
self.helpers.store_ssr_JSON(json=ssr_store)
endpoint = "/api/1.3/slr/store_slr"
debug_log.info("Posting SLR for storage in Service Mockup")
result = post("{}{}".format(self.service_url, endpoint), json=store) # Send copy to Service_Components
# TODO: incase this fails we should try again.
else:
raise DetailedHTTPException(status=500,
detail={
"msg": "Surrogate id mismatch",
"surrogate id's didn't match between requests.": loads(result.text)},
title=result.reason)
else:
raise DetailedHTTPException(status=result.status_code,
detail={"msg": "Something went wrong while verifying SLR with Operator_SLR.",
"Error from Operator_SLR": loads(result.text)},
title=result.reason)
return store, 201
@timeme
@error_handler
@api_logging
def get(self): # Fancy but only used for testing. Should be disabled/removed in production.
sq.task("Debugging endpoint, fetch SLR's from db and return")
jsons = {"jsons": {}}
for storage_row in self.helpers.query_db("select * from storage;"):
debug_log.info(storage_row["json"])
jsons["jsons"][storage_row["surrogate_id"]] = loads(storage_row["json"])
sq.reply_to("Operator_Components Mgmnt", "Return SLR's from db")
return jsons
class DataFlow(Resource):
def __init__(self):
super(DataFlow, self).__init__()
self.service_url = current_app.config["SERVICE_URL"]
self.operator_url = current_app.config["OPERATOR_URL"]
self.helpers = Helpers(current_app.config)
@error_handler
@api_logging
def post(self): # TODO Make this a GET, is this valid anymore?
def renew_token(operator_url, record_id):
sq.task("Renewing Auth Token.")
token = requests.get("{}/api/1.3/cr/auth_token/{}".format(
operator_url,
record_id)) # TODO Get api path from some config?
debug_log.info("{}, {}, {}, {}".format(token.url, token.reason,
token.status_code,
token.text))
store_dict = {cr_id: dumps(loads(token.text.encode()))}
self.helpers.storeToken(store_dict)
def fetch_data_request_urls():
params = request.json
debug_log.info(params)
debug_log.info(request.json)
user_id = params["user_id"]
cr_id = params["cr_id"]
rs_id = params["rs_id"]
sq.task("Get data_set_id from POST json")
data_set_id = request.args.get("dataset_id", None)
debug_log.info(
"data_set_id is ({}), cr_id is ({}), user_id ({}) and rs_id ({})"
.format(data_set_id, cr_id, user_id, rs_id))
sq.task("Create request")
req = {"we want": "data"}
sq.task("Validate CR")
cr = self.helpers.validate_cr(cr_id, surrogate_id=user_id)
sq.task("Validate Request from UI")
distribution_urls = self.helpers.validate_request_from_ui(
cr, data_set_id, rs_id)
# Fetch data request urls
# Data request urls fetched.
debug_log.info("Data request urls fetched.")
return cr_id, cr, distribution_urls
cr_id, cr, distribution_urls = fetch_data_request_urls()
sq.task("Validate Authorisation Token")
surrogate_id = cr["cr"]["common_part"]["surrogate_id"]
our_key = self.helpers.get_key()
our_key_pub = our_key["pub"]
tries = 3 # TODO: Get this from config
while True:
try:
aud = self.helpers.validate_authorization_token(
cr_id, surrogate_id, our_key_pub)
break
except ValueError as e:
debug_log.exception(e)
renew_token(self.operator_url, cr_id)
if tries == 0:
raise EnvironmentError(
"Auth token validation failed and retry counter exceeded."
)
tries -= 1
except TypeError as e:
debug_log.exception(e)
raise EnvironmentError("Token used too soon, halting.")
# Most verifying and checking below is done in the validate_authorization_token function by jwcrypto
# Fetch Authorisation Token related to CR from data storage by rs_id (cr_id?)
# Check Integrity ( Signed by operator, Operator's public key can be found from SLR)
# Check "Issued" timestamp
# Check "Not Before" timestamp
# Check "Not After" timestamp
# Check that "sub" contains correct public key(Our key.)
# OPT: Token expired
# Get new Authorization token, start again from validation. # TODO: Make these steps work as functions that call the next step.
# Check URL patterns in "aud" field
# Check that fetched distribution urls can be found from "aud" field
# Token validated
debug_log.info("Auth Token Validated.")
# With these two steps Sink has verified that it's allowed to make request.
# Construct request
sq.task("Construct request")
# Select request URL from "aud" field
# Add Authorisation Token to request
# Request constructed.
# Sign request
# Fetch private key pair of public key specified in Authorisation Token's "sub" field.
# Sign with fetched private key
sq.task("Fetch key used to sign request")
our_key_full = jwk.JWK()
our_key_full.import_key(**our_key["key"])
# Add signature to request
# Request signed.
# Request created.
sq.send_to("Service_Components Mgmnt (Source)",
"Data Request (PoP stuff)")
# Make Data Request
data = []
for url in distribution_urls:
req = requests.get(url,
auth=SignedRequest(token=aud,
sign_method=True,
sign_path=True,
key=our_key_full,
protected=dumps(
our_key["prot"])))
if req.ok:
data.append(loads(req.content))
debug_log.info(
"Made data request and received following data from Source: \n{}".
format(dumps(loads(req.content), indent=2)))
return {"response_data": data}
