Internet-Draft | SCIM Device Schema Extensions | March 2023 |
Shahzad, et al. | Expires 14 September 2023 | [Page] |
- Workgroup:
- Network Working Group
- Internet-Draft:
- draft-shahzad-scim-device-model-03
- Published:
- Intended Status:
- Standards Track
- Expires:
Device Schema Extensions to the SCIM model
Abstract
The initial core schema for SCIM (System for Cross Identity Management) was designed for provisioning users. This memo specifies schema extensions that enables provisioning of devices, using various underlying bootstrapping systems, such as Wifi EasyConnect, RFC 8366 vouchers, and BLE passcodes.¶
Status of This Memo
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.¶
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.¶
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This Internet-Draft will expire on 14 September 2023.¶
Copyright Notice
Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved.¶
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
1. Introduction
The Internet of Things presents a management challenge in many dimensions. One of them is the ability to onboard and manage large number of devices. There are many models for bootstrapping trust between devices and network deployments. Indeed it is expected that different manufacturers will make use of different methods.¶
SCIM (System for Cross Identity Management) [RFC7643] [RFC7644] defines a protocol and a schema for provisioning of users. However, it can easily be extended to provision devices. The protocol and core schema were designed to permit just such extensions. Bulk operations are supported. This is good because often devices are procured in bulk.¶
1.1. Why SCIM for devices?
Some might ask why SCIM is well suited for this purpose and not, for example, NETCONF or RESTCONF with YANG. After all, there are all sorts of existing models available. The answer is that the only information being passed about the device is neither state nor device configuration information, but only information necessary to bootstrap trust so that the device may establish connectivity.¶
1.2. Protocol Participants
In the normal SCIM model, it was presumed that large federated deployments would be SCIM clients who provision and remove employees and contractors as they are enter and depart those deployments, and federated services such as sales, payment, or conferencing services would be the servers.¶
In the device model, the roles are reversed, and may be somewhat more varied. A deployment network management system gateway (NMS gateway) plays the role of the server, receiving information about devices that are expected to be connected to its network. That server will apply appropriate local policies regarding whether/how the device should be connected.¶
The client may be one of a number of entities:¶
- A vendor who is authorized to add devices to a network as part of a sales transaction. This is similar to the sales integration sometimes envisioned by Bootstrapping Remote Key Infrastructure (BRSKI) [RFC8995].¶
- A client application that administrators or employees use to add, remove, or get information about devices. An example might be an tablet or phone app that scans Easyconnect QR codes.¶
In Figure 1, the onboarding app provides the device particulars. As part of the response, the SCIM server might provide additional information, especially in the case of non-IP devices, where an application-layer gateway may need to be used to communicate with the device. The control endpoint is one among a number of objects that may be returned.¶
1.3. Schema Description
RFC 7643 does not prescribe a language to describe a schema. We have chosen the JSON schema language [I-D.bhutton-json-schema] for this purpose. This implies that use of XML for this device extension is not supported.¶
Several additional schemas specify specific onboarding mechanisms, such as BLE and Wifi Easy Connect.¶
1.4. Schema Representation
Attributes defined in the device core schema and extensions comprise characteristics and SCIM datatypes defined in Sections 2.2 and 2.3 of the [RFC7643]. This RFC does not define new characteristics and datatypes for the SCIM attributes.¶
1.5. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
2. ResourceType Device
This section defines a new resource type, 'Device'. The "ResourceType" schema specifies the metadata about a resource type (see section 6 of [RFC7643]). The resource "Devices" comprises a core device schema and several extension schemas. The core schema provides a minimal resource representation, whereas extension schemas extend the core schema depending on the device's capability. The JSON schema for Device resource type is in Section 6.1.¶
2.1. Common Attributes
The Device schema contains three common attributes as defined in the [RFC7643].¶
id¶
An id is a required and unique attribute of the device core schema (see section 3.1 of [RFC7643]).¶
externalID¶
An externalID is an optional attribute (see section 3.1 of [RFC7643]).¶
meta¶
Meta is a complex attribute and is required (see section 3.1 of [RFC7643]).¶
3. SCIM Core Device Schema
The core device schema provides the minimal representation of a resource "Device". It contains only those attributes that any device may need. Not all attributes are optional. The core schema for "Device" is identified using the schema URI: "urn:ietf:params:scim:schemas:core:2.0:Device". The following attributes are defined in the device core schema.¶
3.1. Singular Attributes
deviceDisplayName¶
This attribute is of type "string" and provides a human-readable name for a device. It is intended to be displayed to end-users and should be suitable for that purpose. The attribute is not required, and is not case-sensitive. The attribute may be modified and should be returned by default. No uniqueness constraints are imposed on this attribute.¶
adminState¶
The "adminState" attribute is of type "boolean" and is a mutable attribute. If set to TRUE, the commands such as connect, disconnect, subscribe that control app sends to the controller for the devices will be processed by the controller. If set to FALSE, any command coming from the control app for the device will be rejected by the controller. This attribute is required and mutable. The attribute should be returned by default and there is uniqueness contraint on the attribute.¶
mudUrl¶
The mudUrl attribute represents the URL to the MUD file associated with this device. This attribute is optional and mutable. The mudUrl value is case sensitive and not unique. When present, this attribute may be used as described in [RFC8520]. This attribute is case sensitive and returned by default.¶
An example of a device SCIM object is as follows:¶
<CODE BEGINS> { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Device"], "id": "e9e30dba-f08f-4109-8486-d5c6a3316111", "deviceDisplayName": "BLE Heart Monitor", "adminState": true, "meta": { "resourceType": "Device", "created": "2022-01-23T04:56:22Z", "lastModified": "2022-05-13T04:42:34Z", "version": "W\/\"a330bc54f0671c9\"", "location": "https://example.com/v2/Device/e9e30dba-f08f-4109-8486-d5c6a3316111" } } <CODE ENDS>¶
The schema for the device is presented in JSON format in Section Section 6.2, while the openAPI representation is provided in Section Section 10.1.¶
4. Device Groups
Device groups are created using the SCIM groups as defined in [RFC7643] Section 4.2.¶
5. SCIM Device Extensions
SCIM provides various extension schemas, their attributes, JSON representation, and example object. These schemas extend the core device schema based on the device's capability (communication stack). This RFC presents an additional hierarchical level by introducing extensions within an extension. See below for more details.¶
[[ DISCUSS: Is this okay with the working group? ]]¶
5.1. BLE Extension
This schema extends the device schema to represent the devices supporting BLE. The extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:ble:2.0:Device¶
The attributes are as follows:¶
5.1.1. Singular Attributes
deviceMacAddress¶
A string vakue that represent a public MAC address assigned by the manufacturer. It is a unique 48-bit value. Ir is required, case insensitive, and it is mutable and return as default. The regex pattern is the following:¶
^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}¶
addressType¶
A boolean flag taken from the BLE core specification, 5.3. If FALSE, the device is using a public MAC address. If TRUE, the device uses a Random address resolved using IRK. This attribute is required, it is mutable, and return by default.¶
irk¶
A string value, Identity resolving key, which is unique for every device. It is used to resolve the random address. It is required when addressType is TRUE. It is mutable and return by default.¶
5.1.2. Multivalued Attributes
versionSupport¶
A multivalued attribute that provides all the BLE versions supported by the device in the form of an array. For example, [4.1, 4.2, 5.0, 5.1, 5.2, 5.3]. It is required, mutable, and return as default.¶
pairingMethods¶
An array of pairing methods associated with the BLE device. The pairing methods may require sub-attributes, such as key/password, for the device pairing process. To enable the scalability of pairing methods in the future, they are represented as extensions to incorporate various attributes that are part of the respective pairing process. Pairing method extensions are nested inside the BLE extension. It is required, case sensitive, mutable, and returned by deafult.¶
5.1.3. BLE Pairing Method Extensions
The details on pairing methods and their associated attributes are in section 2.3 of [BLE53]. This memo defines extensions for four pairing methods that are nested insided the BLE extension schema. Each extension contains the common attributes Section 2.1. These extension are are as follows.¶
(i) pairingNull extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device¶
pairingNull does not have any attribute. It allows pairing for BLE devices that do not require a pairing method.¶
(ii) pairingJustWorks extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device¶
Just works pairing method does not require a key to pair devices. For completeness, the key attribute is included and is set to 'null'. Key attribute is required, immutable, and return by default.¶
(iii) pairingPassKey extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device¶
The pass key pairing method requires a 6-digit key to pair devices. This extension has one singular integer attribute, "key", which is required, mutable and returned by default. The key pattern is as follows:¶
^[0-9]{6}$¶
(iv) pairingOOB extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device¶
The out-of-band pairing method includes three singular attributes, i.e., key, randomNumber, and confirmationNumber.¶
key The key is string value, required and received from out-of-bond sources such as NFC. It is case sensitive, mutable, and returned by default.¶
randomNumber It represents a nounce added to the key. It is and integer value that is required attribute. It is mutable and returned by default.¶
confirmationNumber An integer which some solutions require in RESTful message exchange. It is not required. It is mutable and returned by default if it exists.¶
An example of a device object with BLE extension is as follows:¶
<CODE BEGINS> { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Device", "urn:ietf:params:scim:schemas:extension:ble:2.0:Device"], "id": "e9e30dba-f08f-4109-8486-d5c6a3316111", "deviceDisplayName": "BLE Heart Monitor", "adminState": true, "urn:ietf:params:scim:schemas:extension:ble:2.0:Device" : { "versionSupport": ["5.3"], "deviceMacAddress": "2C:54:91:88:C9:E2", "addressType": false, "pairingMethods": ["urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device"], "urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device": null, "urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device": { "key": null }, "urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device" : { "key": 123456 }, "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device": { "key": "TheKeyvalueRetrievedFromOOB", "randNumber": 238796813516896 } }, "meta": { "resourceType": "Device", "created": "2022-01-23T04:56:22Z", "lastModified": "2022-05-13T04:42:34Z", "version": "W\/\"a330bc54f0671c9\"", "location": "https://example.com/v2/Device/e9e30dba-f08f-4109-8486-d5c6a3316111" } } <CODE ENDS>¶
The schema for the BLE extension is presented in JSON format in Section Section 6.3, while the openAPI representation is provided in Section Section 10.2.¶
5.2. DPP EasyConnect Extension
A schema that extends the device schema to enable WiFi EasyConnect (otherwise known as Device Provisioning Protocol). The extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:dpp:2.0:Device¶
The attributes in this extension are adopted from [DPP2]. The attributes are as follows:¶
5.2.1. Singular Attributes
dppVersion¶
An integer that represents the version of DPP the device supports. This attribute is required, case insensitive, mutable, and returned by default.¶
bootstrapKey¶
A string value representing Elliptic-Curve Diffie–Hellman (ECDH) public key. The base64 encoded lengths for P-256, P-384, and P-521 are 80, 96, and 120 characters. This attribute is required, case-sensitive, mutable, and returned by default.¶
deviceMacAddress¶
The manufacturer assigns the MAC address stored as string. It is a unique 48-bit value. This attribute is optional, case insensitive, mutable, and returned by default. The regex pattern is as follows:¶
^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}.¶
serialNumber¶
An alphanumeric serial number, stored as string, may also be passed as bootstrapping information. This attribute is optional, case insensitive, mutable, and returned by default.¶
5.2.2. Multivalued Attributes
bootstrappingMethod¶
It is the array of strings of all the bootstrapping methods available on the enrollee device. For example, [QR, NFC]. This attribute is optional, case insensitive, mutable, and returned by default.¶
classChannel¶
This attribute is an array of strings of global operating class and channel shared as bootstrapping information. It is formatted as class/channel. For example, ['81/1','115/36']. This attribute is optional, case insensitive, mutable, and returned by default.¶
An example of a device object with DPP extension is below:¶
<CODE BEGINS> { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Device", "urn:ietf:params:scim:schemas:extension:dpp:2.0:Device"], "id": "e9e30dba-f08f-4109-8486-d5c6a3316111", "displayName": "WiFi Heart Monitor", "adminState": true, "urn:ietf:params:scim:schemas:extension:dpp:2.0:Device" : { "versionSupport": ["802.11ax"], "bootstrappingMethod": ["QR"], "bootstrapKey": "MDkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDIgADURzxmttZoIRIPWGoQMV00XHWCAQIhXruVWOz0NjlkIA=", "deviceMacAddress": "2C:54:91:88:C9:F2", "classChannel": ["81/1", "115/36"], "serialNumber": "4774LH2b4044" }, "meta": { "resourceType": "Device", "created": "2022-01-23T04:56:22Z", "lastModified": "2022-05-13T04:42:34Z", "version": "W\/\"a330bc54f0671c9\"", "location": "https://example.com/v2/Device/e9e30dba-f08f-4109-8486-d5c6a3316111" } } <CODE ENDS>¶
The schema for the DPP extension is presented in JSON format in Section Section 6.4, while the openAPI representation is provided in Section Section 10.3.¶
5.3. Zigbee Extension
A schema that extends the device schema to enable the provisioning of Zigbee devices. The extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:zigbee:2.0:Device¶
It has one singular attribute and one multivalued attribute. The attributes are as follows:¶
5.3.1. Singular Attribute
deviceEui64Address¶
An EUI-64 (Extended Unique Identifier) device address stored as string. This attribute is required, case insensitive, mutable, and returned by default. The regex pattern is as follows:¶
^[0-9A-Fa-f]{16}$¶
5.3.2. Multivalued Attribute
versionSupport¶
An array of strings of all the Zigbee versions supported by the device. For example, [3.0]. This attribute is required, case insensitive, mutable, and returned by default.¶
An example of a device object with Zigbee extension is shown below:¶
<CODE BEGINS> { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Device", "urn:ietf:params:scim:schemas:extension:zigbee:2.0:Device"], "id": "e9e30dba-f08f-4109-8486-d5c6a3316111", "displayName": "Zigbee Heart Monitor", "adminState": true, "urn:ietf:params:scim:schemas:extension:zigbee:2.0:Device" : { "versionSupport": ["3.0"], "deviceEui64Address": "50325FFFFEE76728" }, "meta": { "resourceType": "Device", "created": "2022-01-23T04:56:22Z", "lastModified": "2022-05-13T04:42:34Z", "version": "W\/\"a330bc54f0671c9\"", "location": "https://example.com/v2/Device/e9e30dba-f08f-4109-8486-d5c6a3316111" } } <CODE ENDS>¶
The schema for the Zigbee extension is presented in JSON format in Section Section 6.5, while the openAPI representation is provided in Section Section 10.4.¶
5.4. The Endpoint Applications Extension Schema
Sometimes non-IP devices such as those using BLE or Zigbe require an application gateway interface to manage them. SCIM clients MUST NOT specify this to describe native IP-based devices.¶
The device schema is a base schema upon which specific onboarding technology schemas are built. This extension provides two complex attributes deviceControl, and dataReceiver to represent two types of partner endpoint applications, device control, and data receiver applications, respectively. The extension is identified using the following schema URI:¶
urn:ietf:params:scim:schemas:extension:endpointApps:2.0:Device¶
5.4.1. "deviceControl" Complex Attribute
A complex attribute representing the application responsible for controlling the device. Device control applications provide access control for the device. It determines which other applications can access the data from the device. Depending on the use case, there can be more than one device control application. deviceControl has two sub-attributes: (i) a multvalued client-tokens attribute and (ii) a singular attribute called enterpriseEndpoint.¶
client-tokens¶
This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 characters in length. This attribute is a multivalued string which is required, case-sensitive, mutable, and returned by default.¶
[[ We probably need something better here. ]]¶
enterpriseEndpoint¶
Device control apps use the URL of the enterprise endpoint to reach the network gateway. When the enterprise receives the SCIM object from the onboarding app, it adds this attribute to it and sends it back as a response to the onboarding app. This attribute is required, case-sensitive, mutable, and returned by default.¶
5.4.2. "dataReceiver" Complex Attribute
A complex attribute representing the application(s) that receive data from the device. Depending on the use case, there can be more than one data receiver application. "dataReceiver" has two sub-attributes: (i) a multi-valued attribute called client-tokens, and (ii) a singular attribute called enterpriseEndpoint.¶
client-tokens¶
This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 characters in length. This attribute is a multivalued string which is required, case-sensitive, mutable, and returned by default.¶
[[ We probably need something better here. ]]¶
enterpriseEndpoint¶
Data receiver apps use the URL of the enterprise endpoint to reach the network gateway. When the enterprise receives the SCIM object from the onboarding app, it adds this attribute to it and sends it back as a response to the onboarding app. This attribute is required, case-sensitive, mutable, and returned by default.¶
An example of a device object with endpointApps extension is below:¶
<CODE BEGINS> { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Device", "urn:ietf:params:scim:schemas:extension:ble:2.0:Device", "urn:ietf:params:scim:schemas:extension:endpointapps:2.0:Device"], "id": "e9e30dba-f08f-4109-8486-d5c6a3316111", "displayName": "BLE Heart Monitor", "adminState": true, "urn:ietf:params:scim:schemas:extension:ble:2.0:Device" : { "versionSupport": ["5.3"], "deviceMacAddress": "2C:54:91:88:C9:E2", "addressType": false, "pairingMethods": [ "urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device", "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device"], "urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device": null, "urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device": { "key": null }, "urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device" : { "key": 123456 }, "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device": { "key": "TheKeyvalueRetrievedFromOOB", "randNumber": 238796813516896 } }, "urn:ietf:params:scim:schemas:extension:endpointapps:2.0:Device": { "deviceControl": { "client-tokens": [ "1293847109832471203984789383XXX" ], "enterpriseEndpoint": "https//enterprise.com/device_control_endpoint/" }, "dataReceiver": { "client-tokens":[ "dlku23234sdui232393" ], "enterpriseEndpoint": "https//enterprise.com/data_receiver_endpoint/" } }, "meta": { "resourceType": "Device", "created": "2022-01-23T04:56:22Z", "lastModified": "2022-05-13T04:42:34Z", "version": "W\/\"a330bc54f0671c9\"", "location": "https://example.com/v2/Device/e9e30dba-f08f-4109-8486-d5c6a3316111" } } <CODE ENDS>¶
The schema for the endpointApps extension along with BLE extension is presented in JSON format in Section Section 6.6, while the openAPI representation is provided in Section Section 10.5.¶
6. Schema JSON Representation
6.1. Device Resource Schema
<CODE BEGINS> [ { "schemas": ["urn:ietf:params:scim:schemas:core:2.0:ResourceType"], "id": "Device", "name": "Device", "endpoint": "/Device", "description": "Device Account", "schema": "urn:ietf:params:scim:schemas:core:2.0:Device", "schemaExtensions": [ { "schema": "urn:ietf:params:scim:schemas:extension:ble:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:dpp:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:zigbee:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:endpointApps:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:pairingJustWorks:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:pairingPassKey:2.0:Device", "required": false }, { "schema": "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device", "required": false } ], "meta": { "location": "https://example.com/v2/ResourceTypes/Device", "resourceType": "ResourceType" } } ] <CODE ENDS>¶
6.2. Device Core Schema JSON
<CODE BEGINS> { "id": "urn:ietf:params:scim:schemas:core:2.0:Device", "name": "Device", "description": "Device account", "attributes" : [ { "name": "deviceDisplayName", "type": "string", "description": "Human readable name of the device, suitable for displaying to end-users. For example, 'BLE Heart Monitor' etc.", "multivalues": false, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "adminState", "type": "boolean", "description": "A mutable boolean value indicating the device administrative status. If set TRUE, the commands (such as connect, disconnect, subscribe) that control app sends to the controller for the devices will be processeed by the controller. If set FALSE, any command comming from the control app for the device will be rejected by the controller.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "mudUrl", "type": "reference", "description": "A URL to MUD file of the device (RFC 8520).", "multivalues": false, "required": false, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas:core:2.0:Device" } } <CODE ENDS>¶
6.3. BLE Extension Schema JSON
<CODE BEGINS> [ { "id": "urn:ietf:params:scim:schemas:extension:ble:2.0:Device", "name": "bleExtension", "description": "Ble extension for device account", "attributes" : [ { "name": "versionSupport", "type": "string", "description": "Provides a list of all the BLE versions supported by the device. For example, [4.1, 4.2, 5.0, 5.1, 5.2, 5.3].", "multivalues": true, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "deviceMacAddress", "type": "string", "description": "It is the public MAC address assigned by the manufacturer. It is unique 48 bit value. The regex pattern is ^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "Manufacturer" }, { "name": "addressType", "type": "boolean", "description": "AddressType flag is taken from the BLE core specifications 5.3. If FALSE, the device is using public MAC address. If TRUE, device is using Random address which is resolved using IRK.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "irk", "type": "string", "description": "Identity resolving key, which is unique for every device. It is used to resolve random address.", "multivalues": false, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "Manufacturer" }, { "name": "pairingMethods", "type": "string", "description": "List of pairing methods associated with the ble device, stored as schema URI.", "multivalues": true, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim: schemas:extension:ble:2.0:Device" } }, { "id": "urn:ietf:params:scim:schemas:extension:pairingNull:2.0:Device", "name": "nullPairing", "description": "Null pairing method for ble. It is included for the devices that do not have a pairing method.", "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas: extension:pairingNull:2.0:Device" } }, { "id": "urn:ietf:params:scim:schemas:extension: pairingJustWorks:2.0:Device", "name": "pairingJustWorks", "description": "Just works pairing method for ble.", "attributes" : [ { "name": "key", "type": "integer", "description": "Just works does not have any key value. For completeness, it is added with a key value 'null'.", "multivalues": false, "required": true, "caseExact": false, "mutability": "immutable", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim: schemas:extension:pairingJustWorks:2.0:Device" } }, { "id": "urn:ietf:params:scim:schemas: extension:pairingPassKey:2.0:Device", "name": "pairingPassKey", "description": "Pass key pairing method for ble.", "attributes" : [ { "name": "key", "type": "integer", "description": "A six digit passkey for ble device. The pattern of key is ^[0-9]{6}$.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas: extension:pairingPassKey:2.0:Device" } }, { "id": "urn:ietf:params:scim:schemas:extension:pairingOOB:2.0:Device", "name": "pairingOOB", "description": "Pass key pairing method for ble.", "attributes" : [ { "name": "key", "type": "string", "description": "A key value retrieved from out of band source such as NFC.", "multivalues": false, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "randomNumber", "type": "integer", "description": "Nonce added to the key.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "confirmationNumber", "type": "integer", "description": "Some solutions require confirmation number in RESTful message exchange.", "multivalues": false, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas: extension:pairingOOB:2.0:Device" } } ] <CODE ENDS>¶
6.4. DPP Extension Schema JSON
<CODE BEGINS> { "id": "urn:ietf:params:scim:schemas:extension:dpp:2.0:Device", "name": "dppExtension", "description": "Device extension schema for DPP", "attributes" : [ { "name": "dppVersion", "type": "integer", "description": "Version of DPP this device supports.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "bootstrappingMethod", "type": "string", "description": "The list of all the bootstrapping methods available on the enrollee device. For example, [QR, NFC].", "multivalues": true, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "bootstrapKey", "type": "string", "description": "This key is Elliptic-Curve Diffie–Hellman (ECDH) public key. The base64 encoded length for P-256, P-384, and P-521 is 80, 96, and 120 characters.", "multivalues": false, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "deviceMacAddress", "type": "string", "description": "The MAC address assigned by the manufacturer. It is unique 48 bit value. The regex pattern is ^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}.", "multivalues": false, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "Manufacturer" }, { "name": "classChannel", "type": "string", "description": "A list of global operating class and channel shared as bootstrapping information. It is formatted as class/channel. For example, '81/1', '115/36'.", "multivalues": true, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "serialNumber", "type": "string", "description": "An alphanumeric serial number that may also be passed as bootstrapping information.", "multivalues": false, "required": false, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params: scim:schemas:extension:dpp:2.0:Device" } } <CODE ENDS>¶
6.5. Zigbee Extension Schema JSON
<CODE BEGINS> { "id": "urn:ietf:params:scim:schemas:extension:zigbee:2.0:Device", "name": "zigbeeExtension", "description": "Device extension schema for zigbee.", "attributes" : [ { "name": "versionSupport", "type": "string", "description": "Provides a list of all the zigbee versions supported by the device. For example, [3.0].", "multivalues": true, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "deviceEui64Address", "type": "string", "description": "The EUI-64 (Extended Unique Identifier) device address. The regex pattern is ^[0-9A-Fa-f]{16}$.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas: extension:zigbee:2.0:Device" } } <CODE ENDS>¶
6.6. EndpointApps Extension Schema JSON
<CODE BEGINS> { "id": "urn:ietf:params:scim:schemas:extension:endpointApps:2.0: Device", "name": "endpointApps", "description": "Extension for partner endpoint applications that can onboard, control, and communicate with the device.", "attributes" : [ { "name": "deviceControl", "type": "complex", "description": "Device control application attributes.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none", "subAttributes" : [ { "name": "client-tokens", "type": "string", "description": "This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 characters in length.", "multivalues": true, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "enterpriseEndpoint", "type": "reference", "description": "The URL of the enterprise endpoint which device control apps uses to reach enterprise network gateway. When enterprise receives the SCIM object from onboarding app, it adds this attribute to the object and sends back the object as response back to the onboarding app.", "multivalues": false, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ] }, { "name": "dataReceiver", "type": "complex", "description": "Data receiver application attributes.", "multivalues": false, "required": true, "caseExact": false, "mutability": "readWrite", "returned": "default", "uniqueness": "none", "subAttributes" : [ { "name": "client-tokens", "type": "string", "description": "This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 characters in length.", "multivalues": true, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" }, { "name": "enterpriseEndpoint", "type": "reference", "description": "The URL of the enterprise endpoint which device control apps uses to reach enterprise network gateway. When enterprise receives the SCIM object from onboarding app, it adds this attribute to the object and sends back the object as response back to the onboarding app.", "multivalues": false, "required": true, "caseExact": true, "mutability": "readWrite", "returned": "default", "uniqueness": "none" } ] } ], "meta" : { "resourceType" : "Schema", "location" : "/v2/Schemas/urn:ietf:params:scim:schemas: extension:endpointApps:2.0:Device" } } <CODE ENDS>¶
The following sections provide representations of schemas for both SCIM resources and service provider schemas. Note that the JSON representation has been modified for readability and to fit the specification format.¶
8.7.1. Resource Schema Representation¶
The following is intended as an example of the SCIM schema representation in JSON format for SCIM resources. Where permitted, individual values and schema MAY change. This example includes schema representations for "User", "Group", and "EnterpriseUser"; other schema representations are possible.¶
7. Security Considerations
Because provisioning operations are senstive, each client must be appropriately authenticated. Certain objects may be read-only or not visible based on who is connected.¶
[ More to be added here. ]¶
9. Changes from Earlier Versions
Draft -01:¶
- Doh! We forgot the core device schemea!¶
Draft -00:¶
- Initial revision¶
10. APPENDIX
10.1. Device Core Schema OpenAPI Representation
OpenAPI representation of device core schema is as follows:¶
<CODE BEGINS> openapi: 3.0.3 info: title: Device Schema version: 1.0.0 description: API for device core schema components: schemas: Device: title: Device description: Device account type: object properties: deviceDisplayName: type: string description: "Human readable name of the device, suitable for displaying to end-users. For example, 'BLE Heart Monitor' etc." nullable: true readOnly: false writeOnly: false adminState: type: boolean description: A mutable boolean value indicating the device administrative status. If set TRUE, the commands (such as connect, disconnect, subscribe) that control app sends to the controller for the devices will be processeed by the controller. If set FALSE, any command comming from the control app for the device will be rejected by the controller. nullable: false readOnly: false writeOnly: false mudUrl: type: string format: uri description: A URL to MUD file of the device (RFC 8520). It is added for future use. Current usage is not defined yet. nullable: true readOnly: false writeOnly: false required: - adminState additionalProperties: false allOf: - $ref: '#/components/schemas/CommonAttributes' CommonAttributes: type: object properties: id: type: string format: uri description: The unique identifier for a resource. nullable: false readOnly: true writeOnly: false externalId: type: string description: An identifier for the resource that is defined by the provisioning client. nullable: true readOnly: false writeOnly: false meta: type: object properties: resourceType: type: string description: The name of the resource type of the resource. nullable: false readOnly: true writeOnly: false location: type: string format: uri description: The URI of the resource being returned. nullable: false readOnly: false writeOnly: false created: type: string format: date-time description: The date and time the resource was added to the service provider. nullable: false readOnly: true writeOnly: false lastModified: type: string format: date-time description: The most recent date and time that the details of this resource were updated at the service provider. nullable: false readOnly: true writeOnly: false version: type: string description: The version of the resource. nullable: true readOnly: false writeOnly: false additionalProperties: false paths: /devices: post: summary: Create a new device description: Creates a new device. operationId: createDevice requestBody: description: The device to create required: true content: application/json: schema: $ref: '#/components/schemas/Device' responses: '201': description: Created headers: Location: schema: type: string format: uri description: The URI of the newly created device. content: application/json: schema: $ref: '#/components/schemas/Device' /devices/{deviceId}: get: summary: Get a device by ID description: Returns a single device by its ID. operationId: getDeviceById parameters: - name: deviceId in: path description: The ID of the device to return. required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/Device' <CODE ENDS>¶
10.2. BLE Extension Schema OpenAPI Representation
OpenAPI representation of BLE extension schema is as follows:¶
<CODE BEGINS> openapi: 3.0.1 info: version: 1.0.0 title: DPP Extension Schema description: API for DPP device extension schema components: schemas: BleDeviceExtension: type: object properties: versionSupport: type: array items: type: string description: Provides a list of all the BLE versions supported by the device. For example, [4.1, 4.2, 5.0, 5.1, 5.2, 5.3]. nullable: false readOnly: false writeOnly: false deviceMacAddress: type: string description: It is the public MAC address assigned by the manufacturer. It is unique 48 bit value. The regex pattern is ^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}. nullable: false readOnly: false writeOnly: false addressType: type: boolean description: AddressType flag is taken from the BLE core specifications 5.3. If FALSE, the device is using public MAC address. If TRUE, device is using Random address which is resolved using the IRK. nullable: false readOnly: false writeOnly: false irk: type: string description: Identity resolving key, which is unique for every device. It is used to resolve random address. nullable: true readOnly: false writeOnly: false pairingMethods: type: array items: type: string description: List of pairing methods associated with the ble device, stored as schema URI. nullable: true readOnly: false writeOnly: false required: - versionSupport - deviceMacAddress - AddressType - pairingMethods additionalProperties: false NullPairing: type: object properties: id: type: string description: The id of the null pairing schema. nullable: false readOnly: true writeOnly: false PairingJustWorks: type: object description: Just works pairing method for ble properties: key: type: integer description: Just works does not have any key value. For completeness, it is added with a key value 'null'. nullable: false readOnly: false writeOnly: false required: - key PairingPassKey: type: object description: Pass key pairing method for ble properties: key: type: integer description: A six digit passkey for ble device. The pattern of key is ^[0-9]{6}$. nullable: false readOnly: false writeOnly: false required: - key PairingOOB: type: object description: Out-of-band pairing method for BLE properties: key: type: string description: The OOB key value for ble device. nullable: false readOnly: false writeOnly: false randomNumber: type: integer description: Nonce added to the key nullable: false readOnly: false writeOnly: false confirmationNumber: type: integer description: Some solutions require a confirmation number in the RESTful message exchange. nullable: true readOnly: false writeOnly: false required: - key - randomNumber paths: /devices: post: summary: Create a new device operationId: createDevice requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/BleDeviceExtension' anyof: - $ref: '#/components/schemas/NullPairing' - $ref: '#/components/schemas/PairingJustWorks' - $ref: '#/components/schemas/PairingPassKey' - $ref: '#/components/schemas/PairingOOB' responses: '201': description: Created content: application/json: schema: $ref: '#/components/schemas/BleDeviceExtension' anyof: - $ref: '#/components/schemas/NullPairing' - $ref: '#/components/schemas/PairingJustWorks' - $ref: '#/components/schemas/PairingPassKey' - $ref: '#/components/schemas/PairingOOB' /devices/{deviceId}: get: summary: Get a Dpp device by ID description: Returns a single Dpp device by its ID. operationId: getDeviceById parameters: - name: id in: path description: The ID of the device to return. required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/BleDeviceExtension' anyof: - $ref: '#/components/schemas/NullPairing' - $ref: '#/components/schemas/PairingJustWorks' - $ref: '#/components/schemas/PairingPassKey' - $ref: '#/components/schemas/PairingOOB' <CODE ENDS>¶
10.3. DPP Extension Schema OpenAPI Representation
OpenAPI representation of DPP extension schema is as follows:¶
<CODE BEGINS> openapi: 3.0.1 info: version: 1.0.0 title: DPP Extension Schema description: API for DPP device extension schema components: schemas: DppDeviceExtension: type: object properties: dppVersion: type: integer description: Version of DPP this device supports. nullable: false readOnly: false writeOnly: false bootstrappingMethod: type: array items: type: string description: The list of all the bootstrapping methods available on the enrollee device. For example, [QR, NFC]. nullable: true readOnly: false writeOnly: false bootstrapKey: type: string description: This key is Elliptic-Curve Diffie–Hellman (ECDH) public key. The base64 encoded length for P-256, P-384, and P-521 is 80, 96, and 120 characters. nullable: false readOnly: false writeOnly: false deviceMacAddress: type: string description: The MAC address assigned by the manufacturer. The regex pattern is ^[0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}. nullable: false readOnly: false writeOnly: false classChannel: type: array items: type: string description: A list of global operating class and channel shared as bootstrapping information. It is formatted as class/channel. For example, '81/1', '115/36'. nullable: false readOnly: false writeOnly: false serialNumber: type: string description: An alphanumeric serial number that may also be passed as bootstrapping information. nullable: false readOnly: false writeOnly: false required: - dppVersion - bootstrapKey additionalProperties: false paths: /devices: post: summary: Create a new device operationId: createDevice requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/DppDeviceExtension' responses: '201': description: Created content: application/json: schema: $ref: '#/components/schemas/DppDeviceExtension' /devices/{deviceId}: get: summary: Get a Dpp device by ID description: Returns a single Dpp device by its ID. operationId: getDeviceById parameters: - name: id in: path description: The ID of the device to return. required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/DppDeviceExtension' <CODE ENDS>¶
10.4. Zigbee Extension Schema OpenAPI Representation
OpenAPI representation of zigbee extension schema is as follows:¶
<CODE BEGINS> openapi: 3.0.1 info: title: Zigbee Device Extension description: API for Zigbee device extensions schema version: 1.0.0 components: schemas: ZigbeeDeviceExtension: type: object properties: versionSupport: type: array items: type: string description: Provides a list of all the Zigbee versions supported by the device. For example, [3.0]. nullable: false readOnly: false writeOnly: false deviceEui64Address: type: string description: The EUI-64 (Extended Unique Identifier) device address. The regex pattern is ^[0-9A-Fa-f]{16}$. nullable: false readOnly: false writeOnly: false required: - versionSupport - deviceEui64Address description: Device extension schema for Zigbee. paths: /devices: post: summary: Create a new device operationId: createDevice requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ZigbeeDeviceExtension' responses: '201': description: Created content: application/json: schema: $ref: '#/components/schemas/ZigbeeDeviceExtension' /devices/{deviceId}: get: summary: Get a Zigbee device by ID description: Returns a single Zigbee device by its ID. operationId: getDeviceById parameters: - name: id in: path description: The ID of the device to return. required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/ZigbeeDeviceExtension' <CODE ENDS>¶
10.5. EndpointApps Extension Schema OpenAPI Representation
OpenAPI representation of endpoint Apps schema is as follows:¶
<CODE BEGINS> openapi: 3.0.1 info: version: 1.0.0 title: Endpoint Apps Extension description: Extension for partner endpoint applications that can onboard, control, and communicate with the device. components: schemas: endpointApps: type: array items: allOf: - $ref: '#/components/schemas/deviceControl' - $ref: '#/components/schemas/dataReceiver' deviceControl: type: array items: $ref: '#/components/schemas/deviceControlAttributes' deviceControlAttributes: properties: client-tokens: type: string format: uri description: This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 octets in length. nullable: false readOnly: false writeOnly: false enterpriseEndpoint: type: string format: uri description: The URL of the enterprise endpoint which device control apps uses to reach enterprise network gateway. When enterprise receives the SCIM object from onboarding app, it adds this attribute to the object and sends back the object as response back to the onboarding app. nullable: false readOnly: false writeOnly: false required: - client-tokens - enterpriseEndpoint dataReceiver: type: array items: $ref: '#/components/schemas/dataReceiverAttributes' dataReceiverAttributes: properties: client-tokens: type: string format: uri description: This attribute contains a list of tokens that the client will used to authenticate itself. Each token may be a string up to 500 octets in length. nullable: false readOnly: false writeOnly: false enterpriseEndpoint: type: string format: uri description: The URL of the enterprise endpoint which data receiver apps uses to reach enterprise network gateway. When enterprise receives the SCIM object from onboarding app, it adds this attribute to the object and sends back the object as response back to the onboarding app. nullable: false readOnly: false writeOnly: false paths: /endpointApps: get: summary: Get endpoint apps description: Returns all endpoint apps operationId: getAllEndpointApps responses: '200': description: OK content: application/json: schema: type: array items: $ref: '#/components/schemas/endpointApps' <CODE ENDS>¶
11. References
11.1. Normative References
- [BLE53]
- Bluetooth SIG, "Bluetooth Core Specification, Version 5.3", .
- [DPP2]
- Wi-Fi Alliance, "Wi-Fi Easy Connect Specification, Version 2.0", .
- [I-D.bhutton-json-schema]
- Wright, A., Andrews, H., Hutton, B., and G. Dennis, "JSON Schema: A Media Type for Describing JSON Documents", Work in Progress, Internet-Draft, draft-bhutton-json-schema-01, , <https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-01>.
- [RFC2119]
- Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.
- [RFC7643]
- Hunt, P., Ed., Grizzle, K., Wahlstroem, E., and C. Mortimore, "System for Cross-domain Identity Management: Core Schema", RFC 7643, DOI 10.17487/RFC7643, , <https://www.rfc-editor.org/info/rfc7643>.
- [RFC7644]
- Hunt, P., Ed., Grizzle, K., Ansari, M., Wahlstroem, E., and C. Mortimore, "System for Cross-domain Identity Management: Protocol", RFC 7644, DOI 10.17487/RFC7644, , <https://www.rfc-editor.org/info/rfc7644>.
- [RFC8174]
- Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/info/rfc8174>.
- [RFC8520]
- Lear, E., Droms, R., and D. Romascanu, "Manufacturer Usage Description Specification", RFC 8520, DOI 10.17487/RFC8520, , <https://www.rfc-editor.org/info/rfc8520>.
11.2. Informative References
- [RFC8995]
- Pritikin, M., Richardson, M., Eckert, T., Behringer, M., and K. Watsen, "Bootstrapping Remote Secure Key Infrastructure (BRSKI)", RFC 8995, DOI 10.17487/RFC8995, , <https://www.rfc-editor.org/info/rfc8995>.