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How to use _generate_sas_token method in lisa

Best Python code snippet using lisa_python

azure_credentials.py

Source:azure_credentials.py

...49    @return: (Tuple[str, str]) The username and password, respectively50    """51    hostname = _retrieve_hostname(scope_id, device_id, device_key)52    username = "{}/{}/?api-version=2018-06-30".format(hostname, device_id)53    password = _generate_sas_token(hostname, device_key)54    return username, password55def _retrieve_hostname(scope_id, device_id, device_key):56    """Retrieve the IoT Central hostname associated to the device57    @param scope_id:   (str) The device's Scope ID58    @param device_id:  (str) The device's ID59    @param device_key: (str) The device's Shared Access Key60    @return:           (str) The IoT Central hostname61    """62    # Get the authentication token for the requests63    expiration = int(time() + 30)64    resource = "{}%2Fregistrations%2F{}".format(scope_id, device_id)65    auth_token = _generate_sas_token(resource, device_key, expiration)66    auth_token += "&skn=registration"67    # Set up the initial HTTP request68    endpoint = "{}/{}/registrations/{}/".format(AZURE_DPS_ENDPOINT, scope_id, device_id)69    registration = "register?api-version=2018-11-01"70    headers = {71        "Accept": "application/json",72        "Content-Type": "application/json; charset=utf-8",73        "Connection": "keep-alive",74        "UserAgent": "prov_device_client/1.0",75        "Authorization": auth_token76    }77    data = {78        "registrationId": device_id79    }80    # Place a registration request for the device (it should already be registered)81    result = requests.put(endpoint + registration, data=json.dumps(data), headers=headers)82    data = json.loads(result.text)83    # Continue checking device's registration status until it resolves84    while data.get("status") == "assigning" and result.ok:85        operation_id = data.get("operationId")86        operation = "operations/{}?api-version=2018-11-01".format(operation_id)87        result = requests.get(endpoint + operation, headers=headers)88        data = json.loads(result.text)89        sleep(1)  # Pause for a bit90    # Get the device's assigned hub91    if not result.ok:92        logger.error("Ran into an error: %s %s", result.status_code, result.text)93    else:94        hub = data.get("registrationState").get("assignedHub")95        logger.debug("Retrieved hostname: %s", hub)96        return hub97def _generate_sas_token(resource, device_key, expiration=None):98    """Create a SAS token for authentication. More information:99    https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-security100    @param resource:   (str) The IoT Central resource for which the key is created101    @param device_key: (str) The device's Shared Access Key102    @param expiration: (int) The time at which the token expires103    @return:           (str) The SAS token104    """105    if not expiration:106        expiration = int(time() + AZURE_TOKEN_EXPIRATION)107    sign_key = "{}\n{}".format(resource, expiration)108    signature = b64encode((HMAC(b64decode(device_key.encode("utf-8")), sign_key.encode("utf-8"), sha256).digest()))109    signature = quote(signature)110    return "SharedAccessSignature sr={}&sig={}&se={}".format(111        resource,...

azure_client.py

Source:azure_client.py

...28            hostname=self.endpoint,29            device_id=self.device_id30        )31        # generate a SAS token from URI, shared access key and policy name32        sas_token = self._generate_sas_token(self.uri, self.key, self.policy)33        # check if device already exists in registry and register if not34        register_url = "https://{uri}?api-version={version}".format(35            uri=self.uri,36            version=self.API_VERSION37        )38        r = requests.get(register_url, headers={'Content-Type': 'application/json', 'Authorization': sas_token})39        if r.status_code == 404:  # device is not registered yet40            r.close()41            self.device_key = self._register_device(register_url, sas_token)42        elif r.status_code == 200:43            print("Device already registered: {}".format(r.text))44            self.device_key = _get_device_key(r)45        else:46            raise Exception(47                "!! GET request failed with status code {}: {}".format(r.status_code, r.text))48        # generate URL for device to cloud messaging49        self.message_url = "https://{uri}/messages/events?api-version={version}".format(50            uri=self.uri,51            version=self.API_VERSION52        )53    def _register_device(self, url, sas_token):54        """55        create new device identity in Azure IoT hub device registry56        """57        body = '{deviceId: "%s"}' % self.device_id58        r = requests.put(url, headers={'Content-Type': 'application/json', 'Authorization': sas_token}, data=body)59        if r.status_code == 200:60            print("Registered device at hub: {}".format(r.text))61            return _get_device_key(r)62        else:63            raise Exception(64                "!! Device not registered. Request failed with status code {}: {}".format(r.status_code, r.text))65    def _generate_sas_token(self, uri, key, policy_name, valid_secs=10):66        # uri = quote(uri, safe='').lower()67        encoded_uri = quote(uri, safe='')68        expiry = time() + valid_secs69        ttl = int(expiry)70        sign_key = '%s\n%d' % (encoded_uri, ttl)71        signature = b2a_base64(HMAC(a2b_base64(key), sign_key.encode('utf-8'), sha256).digest())72        token = 'SharedAccessSignature ' + urlencode({73            'sr': uri,74            'sig': signature[:-1],75            'se': str(ttl),76            'skn': policy_name77        })78        return token79    def send(self, msg: str):80        # generate a new SAS token for every message to make sure it's still valid81        sas_token = self._generate_sas_token(self.uri, self.key, self.policy)82        r = requests.post(self.message_url, headers={'Authorization': sas_token}, data=msg)83        if r.status_code == 204:84            r.close()85        else:86            raise Exception(...

iothub.py

Source:iothub.py

...20        self._module_id = parsed_connection.get("ModuleId")21        self._username = self._hostname + '/' + self._device_id22        self._c2d_cb = None23        24        self._sas = self._generate_sas_token()25        26        c = MQTTClient(client_id=self._device_id, server=self._hostname, port=8883, user=self._username, password=self._sas, keepalive=120, ssl=True)27        c.DEBUG = True28        c.set_callback(self._callback_handler)29        30        self._mqtt_client = c31        32    def connect(self):33        try:34            self._mqtt_client.reconnect()35            print("Connected to IoT Hub")36        except:37            print("Could not connect")38            39    def send_telemetry(self, msg):  40        try:41            topic=self._get_topic_base() + "/messages/events/"42            self._mqtt_client.publish(topic=topic, msg=msg)43        except:44            print("Could not send telemetry")45    46    def set_c2d_cb(self, cb):47        try:48            self._mqtt_client.subscribe(topic=self._get_topic_base() + "/messages/devicebound/#")49            self._c2d_cb = cb50        except:51            print("Could not set cloud2device msg callback")52            53    def check_msg(self):54        self._mqtt_client.check_msg()55    def _get_topic_base(self):56        if self._module_id:57            base_str = "devices/" + self._device_id + "/modules/" + self._module_id58        else:59            base_str = "devices/" + self._device_id60        return base_str61    def _parse_connection(self):62        cs_args = self._connection_string.split(";")63        dictionary = dict(arg.split("=", 1) for arg in cs_args)64        65        return dictionary66    67    def _generate_sas_token(self, expiry = 86400):  # default to one day expiry period68        print("Retrieving NTP time for token expiration")69        urlencoder=urlencode.Urlencode()70        now=071        while now == 0:72            try:73                now=ntptime.time() + 946684800 # offset for embedded vs POSIX epoch.74            except:75                time.sleep(1)76                print("Failed retrieving NTP time, retrying.")77                78        print("Generating SAS token from key")79        ttl=now + expiry80        urlToSign=urlencoder.quote(self._hostname + '/devices/' + self._device_id)81        msg="{0}\n{1}".format(urlToSign, ttl).encode('utf-8')82        key=base64.b64decode(self._shared_access_key)83        h=hmac.HMAC(key, msg = msg, digestmod = sha256)84        decodedDigest=base64.b64encode(h.digest()).decode()85        signature=urlencoder.quote(decodedDigest)86        sas="SharedAccessSignature sr={0}&sig={1}&se={2}".format(87            urlToSign, signature, ttl)88        return sas89    90    def _renew_sas_token(self):     91        if time.ticks_diff(time.time(), self._lastUpdated) > 60 * 15:92            self._lastUpdated = time.time()93            self._updateSas = True94        if self._updateSas:95            self._sas = self._generate_sas_token()96            print('Updating Sas')97            self._updateSas = False98            99    def _callback_handler(self, topic, msg):...

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