Mathematical Mesh 3.0 Part V: Protocol Reference

Internet-Draft	Mesh Protocol Reference	June 2023
Hallam-Baker	Expires 30 December 2023	[Page]

Abstract

The Mathematical Mesh 'The Mesh' is an end-to-end secure infrastructure that facilitates the exchange of configuration and credential data between multiple user devices. The core protocols of the Mesh are described with examples of common use cases and reference data.¶

[Note to Readers]¶

Discussion of this draft takes place on the MATHMESH mailing list (mathmesh@ietf.org), which is archived at https://mailarchive.ietf.org/arch/search/?email_list=mathmesh.¶

This document is also available online at http://mathmesh.com/Documents/draft-hallambaker-mesh-protocol.html.¶

6. Mesh Service Operations

The Mesh Service operations are divided into the following functional groups:¶

Service Description: Describes the service.¶
Account Management: Operations used to create, reclaim, and delete accounts.¶
Persistence Store Management: Operations used to synchronize persistence store data across connected devices. [May be replaced in a future revision]¶
Device Connection: Operations used by devices requesting connection to the account.¶
Publication: Operations allowing a watched document to be posted to the service and claims made on the document returned to a device.¶
Cryptographic: Cryptographic operations, including threshold operations performed by the service.¶
Messaging: Exchange of messages between Mesh Services.¶

6.1. Service Description

The Hello transaction is used to determine the features supported by the service and obtain the service profile.¶

The request payload only specifies that is is a request for the service description:¶

{
  "HelloRequest":{}}

The response payload describes the service and the host providing that service:¶

{
  "MeshHelloResponse":{
    "EnvelopedProfileService":[{
        "EnvelopeId":"MD3E-FN6W-3G45-YQ43-QXYR-CU4X-RKG5",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNRDNFLUZONlctM0
  c0NS1ZUTQzLVFYWVItQ1U0WC1SS0c1IiwKICAiTWVzc2FnZVR5cGUiOiAiUHJvZml
  sZVNlcnZpY2UiLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCIsCiAg
  IkNyZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDoxM1oifQ"},
      "ewogICJQcm9maWxlU2VydmljZSI6IHsKICAgICJTZXJ2aWNlQXV0aGVudG
  ljYXRpb24iOiB7CiAgICAgICJVZGYiOiAiTUJDNy1HQlU2LUNMTDctVVNKTS1VQ1E
  yLTcyUjItMkg3TyIsCiAgICAgICJQdWJsaWNQYXJhbWV0ZXJzIjogewogICAgICAg
  ICJQdWJsaWNLZXlFQ0RIIjogewogICAgICAgICAgImNydiI6ICJYNDQ4IiwKICAgI
  CAgICAgICJQdWJsaWMiOiAiVHFJdTBrRXdqbmplWGVaZUlENTNhOTg5M2VSSC1CUl
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  XJhbWV0ZXJzIjogewogICAgICAgICJQdWJsaWNLZXlFQ0RIIjogewogICAgICAgIC
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  HsKICAgICAgIlVkZiI6ICJNQVlILVdMWVUtVTZUWC1TNjRWLUU1V1MtNUxMTy1DNF
  pXIiwKICAgICAgIlB1YmxpY1BhcmFtZXRlcnMiOiB7CiAgICAgICAgIlB1YmxpY0t
  leUVDREgiOiB7CiAgICAgICAgICAiY3J2IjogIkVkNDQ4IiwKICAgICAgICAgICJQ
  dWJsaWMiOiAiSF95VEIzck5fT1A4Nk5qa2xVT0hyX1dQMXZnWFFIb1dYbk9YUnNRa
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  AiUHJvZmlsZVNpZ25hdHVyZSI6IHsKICAgICAgIlVkZiI6ICJNRDNFLUZONlctM0c
  0NS1ZUTQzLVFYWVItQ1U0WC1SS0c1IiwKICAgICAgIlB1YmxpY1BhcmFtZXRlcnMi
  OiB7CiAgICAgICAgIlB1YmxpY0tleUVDREgiOiB7CiAgICAgICAgICAiY3J2IjogI
  kVkNDQ4IiwKICAgICAgICAgICJQdWJsaWMiOiAiWC1Wc1hoNjBnSUQ0SEg4SmgtSD
  RZMXNnckNJeVlTTzNyYkVyZDdiZTdNVjBFNnhHN1h4cwogIFNlTzRPQ0ZRSUJzemh
  VYU80MUtYMkFNQSJ9fX19fQ",
      {
        "signatures":[{
            "alg":"S512",
            "kid":"MD3E-FN6W-3G45-YQ43-QXYR-CU4X-RKG5",
            "signature":"XrWp20JnnxON7w0t1c-i7fbPsiJkEOLOXV0R-6av
  bIheT0uRu2k5uD93tXc4a2GFi9nqS7i14kyABxzXkOay0sbmSQAgjEH6kUq10rmS0
  HuAKEdov4GHho1VMfIlXTewwe9U1ACf5TUMz5eBaoWuWSwA"}
          ],
        "PayloadDigest":"owJg7eKJj2zd2AaEkrR90lit59cmLS_W1D_vVAFM
  AtGFG6y5RGEx0q-B39dS6oW1UTQx2jRovu-cXDhiHOJLTA"}
      ],
    "Version":{
      "Major":3,
      "Minor":0,
      "Encodings":[{
          "ID":["application/json"
            ]}
        ]},
    "Status":201}}

The current revision of the specification is designed for small scale deployments in which the service is provided by a single host. The approach will require revision in future versions to fully support a service being provided by multiple hosts with accounts being transferred between the hosts to allow balancing of load.¶

6.2. Account Management

There are three account management operations:¶

BindAccount: Create an account bound to a service address.¶
UnbindAccount: Delete an account bound to a service address¶
RecoverAccount: [TBS] Reclaim an account using a recovered primary secret.¶

The BindAccount operation is used to create User and Group accounts. Currently, these account types are distinct. This may change in future releases.¶

6.2.1. Bind Account

A User Account is bound to a Mesh Service by completing a BindAccount operation with the service.¶

The BindAccount transaction is unique in that it can fail to complete for reasons that are outside the scope of the Mesh specifications. Creation of an account might require payment to be made or authentication of the user's credentials. It is thus quite normal for the result of a CreateRequest to be the account being created in an 'on hold' state which can only be changed out of band.¶

If the request is at least partially successful, a BindResponse message is returned. In the case of partial success, a description of the request status and link to a Web page providing further details MAY be returned.¶

The request payload contains all the information needed to create the account:¶

The account address¶
The account profile¶

Since there is no Access Catalog until the account is created, the Bind Account request and subsequent requests used to initialize the access catalog for the account MUST be authenticated by the Account Authentication key.¶

Alice requests creation of the account alice@example.com. The request payload is:¶

{
  "BindRequest":{
    "AccountAddress":"alice@example.com",
    "EnvelopedProfileAccount":[{
        "EnvelopeId":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQjNULVdJUFotSl
  JDVy1RWkZNLVNDUUwtT1ZWTy1BSE8yIiwKICAiTWVzc2FnZVR5cGUiOiAiUHJvZml
  sZVVzZXIiLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCIsCiAgIkNy
  ZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDoxNVoifQ"},
      "ewogICJQcm9maWxlVXNlciI6IHsKICAgICJDb21tb25TaWduYXR1cmUiOi
  B7CiAgICAgICJVZGYiOiAiTURFMi1NS01JLTc3M1AtR0ozRi1ZWUFJLVVWQ0stT01
  LUyIsCiAgICAgICJQdWJsaWNQYXJhbWV0ZXJzIjogewogICAgICAgICJQdWJsaWNL
  ZXlFQ0RIIjogewogICAgICAgICAgImNydiI6ICJFZDQ0OCIsCiAgICAgICAgICAiU
  HVibGljIjogImpSOXVyUGJvc2xvU1J1NThsa0tHOU80TDVCTnpxYkVzM29xOEl6d0
  xxVTJReUdSazhrV0QKICBvazZPT3doWU9jUmdYZW90X2VWT0FHbUEifX19LAogICA
  gIkFjY291bnRBZGRyZXNzIjogImFsaWNlQGV4YW1wbGUuY29tIiwKICAgICJTZXJ2
  aWNlVWRmIjogIk1EM0UtRk42Vy0zRzQ1LVlRNDMtUVhZUi1DVTRYLVJLRzUiLAogI
  CAgIkVzY3Jvd0VuY3J5cHRpb24iOiB7CiAgICAgICJVZGYiOiAiTUJTSy0yWTZHLU
  RLNlAtVDZUVS1PU0xELUdDRlctTVBIRyIsCiAgICAgICJQdWJsaWNQYXJhbWV0ZXJ
  zIjogewogICAgICAgICJQdWJsaWNLZXlFQ0RIIjogewogICAgICAgICAgImNydiI6
  ICJYNDQ4IiwKICAgICAgICAgICJQdWJsaWMiOiAiUjVXMFRZVXljRU1oR3V4R3VDa
  0JUTVlCMU1nS1owMzZ5MDUyWExWYk1zanhnZzlpREQteQogIFZZVk5lX3lVQ204UU
  d0cFN0XzhFYjNjQSJ9fX0sCiAgICAiQWRtaW5pc3RyYXRvclNpZ25hdHVyZSI6IHs
  KICAgICAgIlVkZiI6ICJNQkw1LUpTTjMtVjU2US00VUxZLUdZN1gtR00zVi1LVlBa
  IiwKICAgICAgIlB1YmxpY1BhcmFtZXRlcnMiOiB7CiAgICAgICAgIlB1YmxpY0tle
  UVDREgiOiB7CiAgICAgICAgICAiY3J2IjogIkVkNDQ4IiwKICAgICAgICAgICJQdW
  JsaWMiOiAiWmM1bjlxNDgyRTVSdUhzSjRlZFdzcjc1YXh3elIzbVdibTVUNWxmbkJ
  UUklBaWNhR1BvZwogIGJxYTU0eVNBN3NXamg0OTB4cnZyRXlhQSJ9fX0sCiAgICAi
  Q29tbW9uRW5jcnlwdGlvbiI6IHsKICAgICAgIlVkZiI6ICJNQlVGLVA3UzItV0ZFR
  i1EM01MLU9LQ0MtWFlPVC02U0xEIiwKICAgICAgIlB1YmxpY1BhcmFtZXRlcnMiOi
  B7CiAgICAgICAgIlB1YmxpY0tleUVDREgiOiB7CiAgICAgICAgICAiY3J2IjogIlg
  0NDgiLAogICAgICAgICAgIlB1YmxpYyI6ICI4U2hGY21OejVCVzluR09idTdfdFVa
  RDVobTVhblM3VGFyNTNSWERjZzVheWlQcGI3TDh6CiAgVkMxbGpqSmVBdS1oazlUV
  U51eVhFN3NBIn19fSwKICAgICJDb21tb25BdXRoZW50aWNhdGlvbiI6IHsKICAgIC
  AgIlVkZiI6ICJNRFlRLUpRQjItM0VPQy1ONFpELUZCSkUtSDNJWS1XTTZWIiwKICA
  gICAgIlB1YmxpY1BhcmFtZXRlcnMiOiB7CiAgICAgICAgIlB1YmxpY0tleUVDREgi
  OiB7CiAgICAgICAgICAiY3J2IjogIlg0NDgiLAogICAgICAgICAgIlB1YmxpYyI6I
  CIyelBsMTBxbnpwR0hfMWlkREZhVk15RXltRWY2Wm1oTXR6cG1sR2ZaSFoyc2lGQz
  BTSEk0CiAgd2FtZ2hzWVMzaEZMX3FYNm1PLVNRUXVBIn19fSwKICAgICJQcm9maWx
  lU2lnbmF0dXJlIjogewogICAgICAiVWRmIjogIk1CM1QtV0lQWi1KUkNXLVFaRk0t
  U0NRTC1PVlZPLUFITzIiLAogICAgICAiUHVibGljUGFyYW1ldGVycyI6IHsKICAgI
  CAgICAiUHVibGljS2V5RUNESCI6IHsKICAgICAgICAgICJjcnYiOiAiRWQ0NDgiLA
  ogICAgICAgICAgIlB1YmxpYyI6ICJvcjJYLXJQMHRhVFg2NkZ4WTY4UlI0UjdHZmc
  zcjYtTUljMzNRZUVnVTF3S2lfSFZLeWlCCiAgbktEWFpFZXhZdEVDMlpIN0NOcVVD
  MlFBIn19fX19",
      {
        "signatures":[{
            "alg":"S512",
            "kid":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
            "signature":"lhicUvvDwdI2cJGDmMDmEYhZIDOp0be5IjblZGn0
  Uycnu3odE_h5jGOY3W58RlXBr_NHUwHfAbGAHcigqzKxUJGrM9MKXzgYF5JUx7uHS
  N4qXpAcBPHHnU1qLepITOsRMoT92a3KmLGskrt9O2PlgBQA"}
          ],
        "PayloadDigest":"hg5Z9SBDuRlEje8R3-0KZFBNHW738w1k0ZvF-nNJ
  KZ4acEZKjmAwOzx3cbf6HXJoWy3eLs4BqYdhXQWkftir1g"}
      ],
    "EnvelopedCallsignBinding":[[{
          "dig":"S512",
          "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJDYWxsc2ln
  bkJpbmRpbmciLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCIsCiAgI
  kNyZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDoxNVoifQ"},
        "ewogICJDYWxsc2lnbkJpbmRpbmciOiB7CiAgICAiQ2Fub25pY2FsIjog
  ImFsaWNlQGV4YW1wbGUuY29tIiwKICAgICJEaXNwbGF5IjogImFsaWNlQGV4YW1wb
  GUuY29tIiwKICAgICJQcm9maWxlVWRmIjogIk1CM1QtV0lQWi1KUkNXLVFaRk0tU0
  NRTC1PVlZPLUFITzIiLAogICAgIlNlcnZpY2VzIjogW3sKICAgICAgICAiUHJlZml
  4IjogIm1tbSJ9XX19",
        {
          "signatures":[{
              "alg":"S512",
              "kid":"MBL5-JSN3-V56Q-4ULY-GY7X-GM3V-KVPZ",
              "signature":"1uBDFGIPMzRcaScJBzyIOECcYtYffBLWM78uv9
  gUiMbLtE_Jg46YyNU5cpStxqNQBKWcKSBEaACAHlNh9eHhL154JZBXuwSw2I0Cac5
  VhS-oHkQragtf3I8Eybdx3FmjW_1ZhBQfp8BJbU05xJY8qyAA"}
            ],
          "PayloadDigest":"PWNW2k-pPnUQGwz5cUiPJbU8bYBcHSBWkbwLO6
  fLqsIP_vEdl3vWpibWyt9ZZF_rM3F5T3DhGXJHM0tsALPKfg"}
        ]
      ]}}

The response payload currently reports the success or failure of the bind operation:¶

{
  "BindResponse":{
    "EnvelopedAccountHostAssignment":[{
        "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJBY2NvdW50SG
  9zdEFzc2lnbm1lbnQiLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCI
  sCiAgIkNyZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDoxNVoifQ"},
      "ewogICJBY2NvdW50SG9zdEFzc2lnbm1lbnQiOiB7CiAgICAiQWNjb3VudE
  FkZGVzcyI6ICJhbGljZUBleGFtcGxlLmNvbSIsCiAgICAiQWNjZXNzRW5jcnlwdCI
  6IHsKICAgICAgIlVkZiI6ICJNQkpBLVNJR0QtRlVOQi1QQVI3LUVCUEItV0FQRy1I
  SERGIiwKICAgICAgIlB1YmxpY1BhcmFtZXRlcnMiOiB7CiAgICAgICAgIlB1YmxpY
  0tleUVDREgiOiB7CiAgICAgICAgICAiY3J2IjogIlg0NDgiLAogICAgICAgICAgIl
  B1YmxpYyI6ICJPUzZsU2lIeThMaVo4Y2tnYlVLcUk4Z0UyaWRjTWFDNFVxaXcyYUF
  FYmphcVRQbWlCUjhxCiAgMFpmdDYyNkRJLVEzXy1UUWthUXZUcXlBIn19fX19"
      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

It is likely that a future revisions of the specification will specify the host(s) to which future account service operations are to be directed. This would allow the account management operations to be separated from the account maintenance operations without requiring the traditional tiered architecture in which every interaction with a service is first routed to a host that cannot perform the required action so that it can be directed to the host that can.¶

6.2.1.1. Bind Group Account

Mesh Group Accounts are created in the same manner as user accounts except that the ProfileGroup is specified.¶

6.2.1.2. Account Recovery

Should all the administration devices be lost, an account MAY be recovered by the process of recovering the profile master secret and using it to access the account through the account authentication key.¶

6.2.2. Unbind Account

An account registration is deleted using the UnbindAccount transaction.¶

>>>> Unfinished ProtocolAccountDelete¶

The request payload:¶

{
  "UnbindRequest":{
    "Account":"alice@example.com"}}

The response payload:¶

{
  "UnbindResponse":{
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

6.2.2.1. Account Transfer

Should a user wish to transfer their account to a new service provider, they first use the Bind Account operation to bind the account to the new service provider, then populate the account entry at the new account using the account authentication key.¶

Only after the new account binding has been completed and is ready for use, is the unbind operation used to delete the account entry at the old service provider.¶

Future versions of the protocol will elaborate on this mechanism so that the change of address can be signaled to connected devices and parties sending messages to the account.¶

6.2.3. Account Recovery and Transfer.

Account recovery is necessary in the case that user has lost control of every administration device connected to the account and must re-create the account profile and bind a new set of administrative devices. Account transfer is the process of unbinding an account from one service and rebinding it to a new one.¶

These capabilities are both critical to the long term success of the Mesh but have been deleted from the current revision of the specification as their implementation is interdependent on the architecture of the callsign registry.¶

>>>> Unfinished ProtocolAccountRecover¶

[TBS]¶

6.3. Persistence Store Management

All the state associated with a Mesh profile is stored as a sequence of DARE Messages in a Dare Container. The Mesh Service holding the master copy of the persistence stores and the devices connected to the profile containing complete copies (replicas) or partial copies (redactions).¶

Thus, the only primitive needed to achieve synchronization of the profile state are those required for synchronization of a DARE Container. These steps are:¶

Obtain the status of the catalogs and spools associated with the account.¶
Download catalog and spool updates¶
Upload catalog updates.¶

To ensure a satisfactory user experience, Mesh Messages are intentionally limited in size to 32 KB or less, thus ensuring that an application can retrieve the most recent 100 messages almost instantaneously on a high bandwidth connection and without undue delay on a slower one.¶

6.3.1. Status

The status transaction returns the status of the containers the device is authorized to access for the specified account together with the updated Device Connection Entry if this has been modified since the entry presented to authenticate the request was issued.¶

Alice adds an entry to her bookmark catalog. Before the bookmark can be added, the device synchronizes to the service. The synchronization process begins with a request for the status of all the stores associated with the account that it has access rights for:¶

{
  "DownloadRequest":{
    "MaxResults":-1,
    "DeviceUDF":"MBYI-QYCM-JXEY-OJ5D-4OW2-RPIR-SHUM",
    "CatalogedDeviceDigest":"MC55-7MYF-ENK3-L6N2-GTXT-WG45-WN",
    "Select":[{
        "Store":"Credential",
        "IndexMin":3},
      {
        "Store":"Contact",
        "IndexMin":3},
      {
        "Store":"Task",
        "IndexMin":1},
      {
        "Store":"Bookmark",
        "IndexMin":1},
      {
        "Store":"Network",
        "IndexMin":1},
      {
        "Store":"Application",
        "IndexMin":1},
      {
        "Store":"Device",
        "IndexMin":3},
      {
        "Store":"Access",
        "IndexMin":3},
      {
        "Store":"Publication",
        "IndexMin":1},
      {
        "Store":"Inbound",
        "IndexMin":3},
      {
        "Store":"Outbound",
        "IndexMin":1},
      {
        "Store":"Local",
        "IndexMin":2}
      ]}}

If the account has a very large number of stores, the device might only ask for the status of specific stores of interest.¶

The response specifies the status of each store specifying the index and Merkle tree apex digest values for each:¶

{
  "DownloadResponse":{
    "Updates":[{
        "Envelopes":[[{
              "enc":"A256CBC",
              "dig":"S512",
              "Salt":"irmN6peoQ3obHMmNW164ow",
              "recipients":[{
                  "kid":"MD5W-K3CL-LJ5Q-YVXA-CMFG-5SPX-TUXV",
                  "epk":{
                    "PublicKeyECDH":{
                      "crv":"X448",
                      "Public":"c1wBMbDx_9Rd82IfuWaPqvf-rDhV5QShZ
  DZE7gEqT6ciyPARKXVSYKjGiRqiGT2PMyi8UY_tkc2A"}},
                  "wmk":"jezjPjJU-Djfm_bZitHdInmOPTg1iIQrx7CseX5Z
  -E6gv9w37BchXg"}
                ],
              "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICI6ZnRwLmV4
  YW1wbGUuY29tIiwKICAiRXZlbnQiOiAiVXBkYXRlIn0",
              "SequenceInfo":{
                "Index":3,
                "TreePosition":1137},
              "Received":"2023-06-28T17:00:19Z",
              "PayloadDigest":"hAJqF3IoraQqNHLcHZMsf_c1IcrD_xDOnJ
  0gN9QBcSoRk8QhcfsKzi9L6J7kGzjhHprDCxyYgCE88DZUYC7CnA",
              "TreeDigest":"ZdG_UR3YUbPxX1e28NR6S26yAwkmsLKmwSkcH
  12bWUrEH9A54K_PX9VdKZODQQ5yy0nBtvubUAJefbjgexLeFw"},
            "UC8cIjRLdmfLxW4pQ7-dAl1nKucTTs29pTSCQM6_v3H0d4jL8lzn
  tinoJGl6PgkOEiyPYc6a7ioi_RnEpFlH1dtoZ7Ra6VE_Y0co944cx3f05CZdZc9Zz
  P6k7d4XpShqnJq7rMvTZDMOHsiWr7VnulMz9_mU4g_uAz94qwvACdA",
            {}
            ]
          ],
        "Store":"Credential"},
      {
        "Envelopes":[
          ],
        "Store":"Contact"},
      {
        "Envelopes":[
          ],
        "Store":"Task"},
      {
        "Envelopes":[
          ],
        "Store":"Bookmark"},
      {
        "Envelopes":[
          ],
        "Store":"Network"},
      {
        "Envelopes":[
          ],
        "Store":"Application"},
      {
        "Envelopes":[
          ],
        "Store":"Device"},
      {
        "Envelopes":[
          ],
        "Store":"Access"},
      {
        "Envelopes":[
          ],
        "Store":"Publication"},
      {
        "Envelopes":[
          ],
        "Store":"Inbound"},
      {
        "Envelopes":[
          ],
        "Store":"Outbound"},
      {
        "Envelopes":[
          ],
        "Store":"Local"}
      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

Bug: The current version of the reference code is only returning the digest values for the outbound store.¶

6.3.2. Download

The download transaction returns a collection of entries from one or more containers associated with the profile.¶

The service MAY limit the number of entries returned in an individual response for performance reasons.¶

The previous status operation has reported that a new envelope has been added to the credential store. The device requests this data from the service:¶

The response contains the requested envelope:¶

Future: The current implementation of the download operation is limited by the capabilities of the HTTP binding of the RUD transport. A future binding allowing operations that consist of a single request followed by a sequence of responses will allow much greater flexibility.¶

Future versions of the protocol may support optional filtering criteria so that the service only returns objects matching specific criteria and/or only return certain parts of the selected messages.¶

6.3.3. Transact

The transact transaction appends envelopes to one or more stores. The operation is atomic, that is either all the changes specified will be made to the stores or none will. This ensures that simultaneous attempts to update a store do not result in race conditions allows Mesh stores to provide ACID (Atomicity, Consistency, Isolation, Durability) properties to the applications they serve.¶

Clients SHOULD check to determine if updates to a container conflict with pending updates on the device waiting to be uploaded. For example, if a contact that the user modified on the device attempting to synchronize was subsequently deleted. The means of resolving such conflicts is not in the scope of this specification.¶

Each update to a catalog or container specifies the expected container index and apex digest. This provides a strong guarantee of consistency. The service MUST verify each update to check that the Merkle Tree values specified are consistent with the store entries and that the signature on the apex value (if specified) is valid and correct.¶

Services MAY impose limits on the size and number of additions performed in response to a TransactRequest message to ensure that processing time does not degrade performance for other users.¶

The request payload specifies the data to be appended to the stores.¶

{
  "TransactRequest":{
    "Updates":[{
        "Envelopes":[[{
              "enc":"A256CBC",
              "dig":"S512",
              "kid":"EBQG-ABNM-VGL3-YZPB-MCTH-RCCN-MVRF",
              "Salt":"zQqPRQivGSXVQpq_vC-glA",
              "recipients":[{
                  "kid":"MDEC-T7A4-FMKQ-ARG4-A7XL-C5YG-6Z7P",
                  "epk":{
                    "PublicKeyECDH":{
                      "crv":"X448",
                      "Public":"YjBwUWu6QUiLDH6yKpmzF0NqewYU2ceNy
  XlighsJvD4u9HlucHVHP8_z1wH3vSAAGDhEXi1GOkQA"}},
                  "wmk":"zcLc8KMJYu8BItSMrHEM1ny8wvLb6VcLFBLW1gGK
  teX2yunNOas-kw"}
                ],
              "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJOQVFULUZL
  N1gtR0w1QS1DUUNOLTVWNUQtWFlWVC1VMjY3IiwKICAiRXZlbnQiOiAiTmV3In0",
              "SequenceInfo":{
                "Index":1,
                "TreePosition":0},
              "PayloadDigest":"6ZmcFu-7qSH168GqmF7ivXphhJ7pqpAEj1
  ire6a5gXGyNYqeZbTC7uu0v1Kfw31IyEAPu5HUSHciuJdAS2cw-A",
              "TreeDigest":"zQRyNXghPaZ6zCnb34oSAt986UQkvhtIAlzlQ
  wf4NWVafUSGIMNKbce9tIg18ETBO-jZoFh4F_13Cm0_arXQFA"},
            "mKlLNGh_cJ7xht4pkpMZuRlkBe1NsM5AlY8FRptEQxTySgXE_IA4
  y9VfLcDcTOu6KmDSk9x1Vz2vX53C8eIhb1dZs5VNjjyQr6Nt8LNh4SI32f3NsF78v
  dyGBP-jImCOo3mWkivzQqJC9ZGKgzPTlDCMP_20oh6vwO8n2UcusTseMVfOjWmlIH
  zhMKynHC00"
            ]
          ],
        "Store":"Bookmark"}
      ]}}

The response reports successful completion:¶

{
  "TransactResponse":{
    "Bitmask":"AAEAAA",
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

6.4. Device Connection

In order to support the wide range of affordances supported by devices, four device connection interactions are currently specified. The use of these mechanisms is described in [draft-hallambaker-mesh-architecture] and the interactions themselves are described in section ??? following.¶

Device connection operations are always issued by a device requesting connection to a Mesh account and must therefore be authenticated under the device profile rather than the account profile. Two device connection operations are currently defined:¶

Connect: Requests connection to the account.¶
Complete: Polls for completion of a connection request.¶

Since the second operation is merely polling for completion of the transaction requested by the first, it is likely that these will be combined in a future revision of the specification.¶

6.4.1. Connect

If the connection request is initiated by the device being connected, the device constructs a RequestConnection message which is posted to the Mesh Service using the Connect operation.¶

If the Connect operation is accepted (i.e. the service determines it is not abuse), the service constructs an AcknowledgeConnection message which is forwarded to the inbound spool of the account to which connection is requested. The requesting device receives a copy of the AcknowledgeConnection message and the profile of the account it is requesting connection to.¶

As described in the following section, the AcknowledgeConnection message contains the request details presented by the device and a nonce value generated by the service. This nonce value is used to compute the witness value that will be used for mutual authentication of the device and account.¶

The connect request is made to the service, not the account. The payload contains the enveloped connection request:¶

{
  "ConnectRequest":{
    "EnvelopedRequestConnection":[{
        "EnvelopeId":"MBDW-KFHR-OR66-U6CR-CCEV-N4DD-MXXQ",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJOQ081LUFWN0EtRF
  pZWS1BNUpELUdHV0ktS0gzWS1PSk5EIiwKICAiTWVzc2FnZVR5cGUiOiAiUmVxdWV
  zdENvbm5lY3Rpb24iLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCIs
  CiAgIkNyZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDo0NVoifQ"},
      "ewogICJSZXF1ZXN0Q29ubmVjdGlvbiI6IHsKICAgICJBY2NvdW50QWRkcm
  VzcyI6ICJhbGljZUBleGFtcGxlLmNvbSIsCiAgICAiQXV0aGVudGljYXRlZERhdGE
  iOiBbewogICAgICAgICJFbnZlbG9wZUlkIjogIk1CWFYtU0lCRi00WEVXLTRFVkUt
  N1VSVy1GNlZULU5UWDMiLAogICAgICAgICJkaWciOiAiUzUxMiIsCiAgICAgICAgI
  kNvbnRlbnRNZXRhRGF0YSI6ICJld29nSUNKVmJtbHhkV1ZKWkNJNklDSk5RbGhXTF
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  pVFdWemMyRm5aVlI1Y0dVaU9pQWlVSEp2Wm1sc1oKICBVUmxkbWxqWlNJc0NpQWdJ
  bU4wZVNJNklDSmhjSEJzYVdOaGRHbHZiaTl0YlcwdmIySnFaV04wSWl3S0lDQQogI
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  pzYVdOTFpYbEZRMFJJSWpvZ2V3b2dJQ0FnSUNBZ0lDQWdJbU55ZGlJNklDSllORFE
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  S0lDQWdJQ0FnSUNBaVVIVmliCiAgR2xqUzJWNVJVTkVTQ0k2SUhzS0lDQWdJQ0FnS
  UNBZ0lDSmpjbllpT2lBaVJXUTBORGdpTEFvZ0lDQWdJQ0EKICBnSUNBZ0lsQjFZbX
  hwWXlJNklDSmlSVnBtVlRkTFJFTlJSbkZoUWpOM01sbDBTV0l0WDNNNWVsTmhVVEJ
  PWAogIHkxRlExZHNlbGN5YVcweFprSkxjVEJ2WTFoU0NpQWdTR3RIT0ZKR09XZDZR
  MjlwWnpkMVRFeEtZVXN5VlVWCiAgQkluMTlmWDE5IiwKICAgICAgewogICAgICAgI
  CJzaWduYXR1cmVzIjogW3sKICAgICAgICAgICAgImFsZyI6ICJTNTEyIiwKICAgIC
  AgICAgICAgImtpZCI6ICJNQlhWLVNJQkYtNFhFVy00RVZFLTdVUlctRjZWVC1OVFg
  zIiwKICAgICAgICAgICAgInNpZ25hdHVyZSI6ICJWUVlCYlJsNnhtLVR6by11R2tP
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  BqajhjV25qYW5vemZTWE0xYjdUMDhETDdVR080ZERxR2FHcUY1RHhnQSJ9XSwKICA
  gICAgICAiUGF5bG9hZERpZ2VzdCI6ICJiR3EtY2o5SjdPSHNmdmhrMGhYc093dFA2
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  AiTkNPNS1BVjdBLURaWVktQTVKRC1HR1dJLUtIM1ktT0pORCJ9fQ"
      ],
    "Rights":[
      ]}}

The response payload contains the information the device requires to compute the witness value and to poll for completion. This is a copy of the request acknowledgement and a copy of the profile of the account the device has requested connection to:¶

{
  "ConnectResponse":{
    "EnvelopedAcknowledgeConnection":[{
        "EnvelopeId":"MBXJ-7P6B-AMOK-NITJ-E5L4-ODSV-OGM4",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJHU0pSLU9IVTUtSE
  hYTy1LVVJZLVNUNEItSFZCQS03UFY1IiwKICAiTWVzc2FnZVR5cGUiOiAiQWNrbm9
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  Y3QiLAogICJDcmVhdGVkIjogIjIwMjMtMDYtMjhUMTc6MDA6NDVaIn0"},
      "ewogICJBY2tub3dsZWRnZUNvbm5lY3Rpb24iOiB7CiAgICAiRW52ZWxvcG
  VkUmVxdWVzdENvbm5lY3Rpb24iOiBbewogICAgICAgICJFbnZlbG9wZUlkIjogIk1
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      ],
    "EnvelopedProfileAccount":[{
        "EnvelopeId":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQjNULVdJUFotSl
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  ZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDoxNVoifQ"},
      "ewogICJQcm9maWxlVXNlciI6IHsKICAgICJDb21tb25TaWduYXR1cmUiOi
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      {
        "signatures":[{
            "alg":"S512",
            "kid":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
            "signature":"lhicUvvDwdI2cJGDmMDmEYhZIDOp0be5IjblZGn0
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          ],
        "PayloadDigest":"hg5Z9SBDuRlEje8R3-0KZFBNHW738w1k0ZvF-nNJ
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      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

6.4.2. Complete

The complete operation is used to complete the binding of a device to the account regardless of whether the operation is initiated by the administration device or the connecting device.¶

The complete request is made to the service, not the account. The payload specifies the account the device is requesting completion for and the identifier of the completion message.¶

{
  "CompleteRequest":{
    "AccountAddress":"alice@example.com",
    "ResponseID":"MAQQ-DQZI-2WLP-3E5Y-IMGT-PLIE-MJ2S"}}

The response payload:¶

{
  "CompleteResponse":{
    "EnvelopedRespondConnection":[{
        "EnvelopeId":"MDKD-7RK2-R4N2-EZCJ-EMBN-LK3N-JKLE",
        "enc":"A256CBC",
        "Salt":"iev2KhrXpOYSwL6Tr3OKNA",
        "recipients":[{
            "kid":"MBXU-7AJ5-JPKO-GJWN-KDEA-XGGR-CFIY",
            "epk":{
              "PublicKeyECDH":{
                "crv":"X448",
                "Public":"Ldw4t6zhA3VZhZ2RfKYbcG_GIDz6PeAu8q2sZno
  f62K8LHpo6TT5JiuY66flwTeLAHuaDnRl1M8A"}},
            "wmk":"NHcS-jMSUzyymrPYWR0srjUG1M9VUdmsAkyFMHU_EZeOir
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          ],
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQVFRLURRWkktMl
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        "SequenceInfo":{
          "Index":3,
          "TreePosition":449},
        "Received":"2023-06-28T17:00:46Z"},
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      {}
      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

6.5. Publication

[Future: Consider eliminating this mechanism entirely and instead using messaging flows. The means of achieving this should become better apparent when the problem of publishing large messages via a pull mechanism is considered.]¶

The Publication mechanism allows content to be published through a Mesh Account and retrieved by means of the EARL mechanism described in Uniform Data Fingerprint [draft-hallambaker-mesh-udf]. This mechanism is used in certain flows supported by the Mesh Device Connection and Contact Exchange functions. There are two operations:¶

Claim: Post a claim to a published document¶
PollClaim: Check to see if a claim has been posted.¶

Content is published by appending an entry to an account's Publication catalog by means of a Transact operation. The content may then be retrieved by issuing a claim to the account specifying the publication identifier that is authenticated under the value specified in the EARL.¶

Use of the Publication catalog to post content necessarily requires that the content be smaller than the maximum message size imposed by the Mesh Service so that it can be uploaded to the service by means of a Transact transaction.¶

Publication of large data items will require modification of the protocol to support use of a detached message body. Transfer of a detached message body is outside the scope of this document.¶

6.5.1. Claim Transaction

The claim transaction is used to post a claim to a document published by means of an EARL. The claim interaction is used in the Static QR Code connection interaction but MAY be used for other purposes as required by Mesh applications.¶

A claim is made by sending a ClaimRequest message to the service to which the publication is posted. The service responds with a ClaimRespose message specifying the success or failure of the claim.¶

A device is preconfigured during manufacture and a Device Description published to the EARL:¶

The client claiming the publication creates a claim message specifying the resource being claimed and the address of the Mesh account making the claim.¶

{
  "MessageClaim":{
    "PublicationId":"EBQC-OKCE-7PPE-SQ4J-IY6Q-XGHA-OD4J",
    "ServiceAuthenticate":"ADIR-QW2Y-YEDT-AXAC-LOWW-MHK2-VROC",
    "DeviceAuthenticate":"AD4N-2ENX-A42Q-PNOT-GVBS-DDYD-7SQD",
    "MessageId":"NA2A-OY2I-OZGM-Q2FP-RI2C-BI2V-I2CE",
    "Sender":"alice@example.com",
    "Recipient":"maker@example.com"}}

The message is signed by the claimant to make a RequestClaim to the service:¶

{
  "ClaimRequest":{
    "EnvelopedMessageClaim":[{
        "EnvelopeId":"MD54-PJZM-F6UL-E5GY-X2EZ-ZPLV-NH4H",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJOQTJBLU9ZMkktT1
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      {
        "signatures":[{
            "alg":"S512",
            "kid":"MDE2-MKMI-773P-GJ3F-YYAI-UVCK-OMKS",
            "signature":"AVvfeF9kk8VekNI1EIi0qISa7yRvOWccRXxqf2YJ
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          ],
        "PayloadDigest":"A-z5xIvCyoCCIcWvFZGshgLRFxI6SHPXgRdYidy0
  CHfIQSh0gShhJQPm0IWemu7IdFr10Q65Qj231ngp78TK7w"}
      ]}}

The publication is found and the claim is accepted, the publication is returned in the response.¶

{
  "ClaimResponse":{
    "CatalogedPublication":{
      "Id":"EBQC-OKCE-7PPE-SQ4J-IY6Q-XGHA-OD4J",
      "Authenticator":"EA5K-OOBH-7FV3-N47W-JOWD-YBEE-676U-6CRX-NW5X
-HL36-H53W-AS26-CQ3L-2",
      "EnvelopedData":[{
          "enc":"A256CBC",
          "kid":"EBQC-MPUZ-GTPF-CZVW-LZCR-KJRL-VVJ6",
          "Salt":"UGfYaamJakLw9-AxTE0aGA",
          "recipients":[{
              "kid":"EBQC-OKCE-7PPE-SQ4J-IY6Q-XGHA-OD4J",
              "wmk":"07bXydiQxFJzzC7ZdXvIL_xNPYWA__UKTTscClnl0JBm
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            ]},
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  HJiBXR6aRwyCBLOAwES9FF14nvHrH5L-i57I_KabWxwvNWMsDNHcKTmN2T1-IrdVt
  9STbk-_PI5Z1mZnAWnff0HgKikH6dXg6omsQgD8ej4G87nGAJs9amn5T9pe8wslt2
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  tfCaKqdEj4zFYv6vTlRBBzJSYw9sIpp8eusT6048UBflxyWCR-C3LOKw5Wski31p7
  Q4qvO0_cFv26pwaNnAIlU8UR-UzdPpaiwc-pj3R_9fQqK3PLqiYN-N9xjIvhUd4Lz
  WE-WVzPWEZd3BxmV98rKv-Zm3Mu4ehOZ2nH0WyrweCm7jBTdcPKWRrhQ4toh2wY7j
  ijEkDzUgfVAD1-XhTDoe9Rav3L_TLI4T-6c12LhgbB0BLuVALH8xh23CnU16fj8IJ
  RWKcc1gtTxfEqbfimtX_nvok0bWyfgr_n4kGXtCeS6Vg1csS8zT6F1bgecnHi-pxh
  swQ-KG3oSEeKCB8L3_M4nybYphwLw8GMFX6zXArm2PeUZpzc9Izec5z9pvwiRzsM0
  FKP2Yg13qxC85t9UCFWPSupvRZjHIfSK7o9gOrh6Tb-MJSgsjjHWuwipKaAf2oy2k
  KREgyyPyv0HY2O8po2kPZAVDLRU6Kgh7aymaIurR3EhHrgz_wZfcXei5GbTkLV5So
  -2PEhfJ75ayqbJK977xKtIrKy0tugcud7uFvhn2dEwQi4OEDGFThGHKhdOI-eyu4X
  xUWQyPKOlEQ8IMc9S_V3OA5z0IiwtNjwU8eIgsjVrwupLdWnSlO5UClDOrkSC9clN
  vFzYXsRo4XDT3gxrb9AsObNUc-Pk0jXz2avuTr-5rqoJV1zfTmQPNiLG4wwC4gkBW
  _3R9KqArQ_YW47cHdX8Cyd2lzubSxsZzUbn1nK1GBIE7HmE8eDM1Gd93VRrRwM0k7
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  PKoLmpHOjVMTY-nTYivvGt0Ssqr1siwxGZiyFlni6eiuBlkhw"
        ]},
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

The device waiting to be connected uses the PollClaim transaction to receive notification of a claim having been posted.¶

6.5.2. PollClaim Transaction

The PollClaim transaction is used to discover if a claim has been posted to a published document.¶

When an authenticated, authorized request is made, the service responds with the latest claim posted to the publication.¶

The device in the example above periodically polls the service to which the device description is published to find if a claim has been registered.¶

The PollClaimRequest contains the account to which the document is published and the publication ID:¶

{
  "PollClaimRequest":{
    "PublicationId":"EBQC-OKCE-7PPE-SQ4J-IY6Q-XGHA-OD4J",
    "TargetAccountAddress":"maker@example.com"}}

The response returns the latest claim made as signed message:¶

{
  "PollClaimResponse":{
    "EnvelopedMessage":[{
        "EnvelopeId":"MAFW-3V3U-3EQO-GEQ4-RPIJ-NPIG-OZLR",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJOQTJBLU9ZMkktT1
  pHTS1RMkZQLVJJMkMtQkkyVi1JMkNFIiwKICAiTWVzc2FnZVR5cGUiOiAiTWVzc2F
  nZUNsYWltIiwKICAiY3R5IjogImFwcGxpY2F0aW9uL21tbS9vYmplY3QiLAogICJD
  cmVhdGVkIjogIjIwMjMtMDYtMjhUMTc6MDA6NTBaIn0",
        "SequenceInfo":{
          "Index":1,
          "TreePosition":0},
        "Received":"2023-06-28T17:00:50Z",
        "signatures":[{
            "alg":"S512",
            "kid":"MDE2-MKMI-773P-GJ3F-YYAI-UVCK-OMKS",
            "signature":"AVvfeF9kk8VekNI1EIi0qISa7yRvOWccRXxqf2YJ
  zEotsx4ARBhGJ5GGI3KCWyy1Ejq1ZLxW2xMAcypvT6OxKRhscsvdphabQRSJdztgc
  9SYCxbU5q8N4jQ-CwMlYLQssQVi6AiKU0pOh9DzPeUiKREA"}
          ],
        "PayloadDigest":"A-z5xIvCyoCCIcWvFZGshgLRFxI6SHPXgRdYidy0
  CHfIQSh0gShhJQPm0IWemu7IdFr10Q65Qj231ngp78TK7w"},
      "ewogICJNZXNzYWdlQ2xhaW0iOiB7CiAgICAiUHVibGljYXRpb25JZCI6IC
  JFQlFDLU9LQ0UtN1BQRS1TUTRKLUlZNlEtWEdIQS1PRDRKIiwKICAgICJTZXJ2aWN
  lQXV0aGVudGljYXRlIjogIkFESVItUVcyWS1ZRURULUFYQUMtTE9XVy1NSEsyLVZS
  T0MiLAogICAgIkRldmljZUF1dGhlbnRpY2F0ZSI6ICJBRDROLTJFTlgtQTQyUS1QT
  k9ULUdWQlMtRERZRC03U1FEIiwKICAgICJNZXNzYWdlSWQiOiAiTkEyQS1PWTJJLU
  9aR00tUTJGUC1SSTJDLUJJMlYtSTJDRSIsCiAgICAiU2VuZGVyIjogImFsaWNlQGV
  4YW1wbGUuY29tIiwKICAgICJSZWNpcGllbnQiOiAibWFrZXJAZXhhbXBsZS5jb20i
  fX0",
      {}
      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

6.6. Cryptographic

The Operate transaction is used to perform one or more cryptographic operations using private key material recorded in the Threshold Catalog. Such operations typically represent one part of a threshold key operation divided between the service and a device connected to an account.¶

As with all operations involving the Access catalog, the request MUST meet the authentication criteria specified by the catalog entry. These typically include the request being authenticated by a specific key.Key Agreement¶

CryptographicOperationKeyAgreement is used to request a threshold key agreement operation on a specified public key.¶

Alice added Bob to groupw@example.com as a member. This resulted in Bob receiving the invitation described in section ??? and the following access entry being added to the Access catalog of the group account:¶

{
  "CatalogedAccess":{
    "Capability":{
      "CapabilityDecryptServiced":{
        "GranteeUdf":"bob@example.com",
        "EnvelopedKeyShare":[{
            "enc":"A256CBC",
            "kid":"EBQM-SDBL-2FII-4ZEO-XDZK-3ZMX-IGPU",
            "Salt":"o5MMIhLjNAF69Olax4CPaw",
            "recipients":[{
                "kid":"MBJA-SIGD-FUNB-PAR7-EBPB-WAPG-HHDF",
                "epk":{
                  "PublicKeyECDH":{
                    "crv":"X448",
                    "Public":"V_Q7ZRiaZHf_aFJiMZRIqxclvTbV-K8nJy0
  C8Hv8eC8bTSZ4mxj9yoCq9rGWS3iZJpnwVGhRW7AA"}},
                "wmk":"gbw5UOsFlyZgKYLkp_F-N9S-UQwYxi7tARS4UpDgSa
  tznboopHoz4g"}
              ],
            "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJLZXlEYX
  RhIiwKICAiY3R5IjogImFwcGxpY2F0aW9uL21tbS9vYmplY3QiLAogICJDcmVhdGV
  kIjogIjIwMjMtMDYtMjhUMTc6MDA6NDRaIn0"},
          "Vq_0YOMoVHrh_12ZfRAh6IEucnE940F8yrBwaDJ3pgbIb_Lg-ZuBr3
  taOfL1Y3EqG6uAo3SNOpyLwLpAuQlKoyj3ARlD6dKqOLweJ08p-ntNePRseexnltL
  H-ZzmD435w8xUq0a0u-8exOhiTM8Ews1_ger8Ca-J7PILCoXBMqaFKnY0gYNqoDps
  3L-DobgCXKahFUvS_m2QMjrZYgb0MJsytbhD6KIQbsUvbKvv-m7O84oV0ZWkuR2kN
  0dvN3PRjfEkMtXdCqticFaji-h9W58qH4EttDtuKgwimIRI990kBulZXerH1M_PZ4
  ey1VaBS7vR4c6AE5IkorL0ZWm-SZKBX6oiXTU4jPmfuerThRPZIGSbbrIaCVMtxdU
  RufhOrrXq8oSTwSbT-htVlW_5tkiOyhX_xkSDDiouTuOJ9U4gld47Ovs04KOSDCfH
  EXc-DlGK7GO_D9HAxPsHcIA8ICRheJyGhieyrOmImca3Mb9ukKX-Tt9JzrKOnap1J
  4pVwANgVrhinmji8l5O1DHtoECxtSz-UDObszOTZWQlmXgdXwRpFEaIBrdMDuxTVK
  d_vyypUv1Grty9nwV8IWYp9rKdDYK4lVfmTzR0fPhgHVYgBKDlrUuz8ncszmoSu9B
  xQ6GcuUlQSxWmykgnfwGvdB2NXmH-PXfmvtfGW08BkTzVD3ShoJY10VcKnnPhXgI2
  QxZ9oQtggCVzNnWk10Caqw"
          ],
        "Id":"MAOA-XEIS-6KM2-334Y-7M3P-S4U3-LCQP",
        "Active":true}}}}

The private key (in this case a key share) is encrypted under the service key.¶

To make use of the access entry, a request is made that specifies the key share to be operated on and the public key parameters to perform the agreement with.¶

The request payload:¶

{
  "OperateRequest":{
    "AccountAddress":"groupw@example.com",
    "Operations":[{
        "CryptographicOperationKeyAgreement":{
          "PublicKey":{
            "PublicKeyECDH":{
              "crv":"X448",
              "Public":"6mY-euLujNnyO12hdczFv4vckjk1FGrQwXZeye329
  U2FtV7i3PLLbxIwOvkfEJOtp7zUtXdc5DMA"}},
          "KeyId":"MAOA-XEIS-6KM2-334Y-7M3P-S4U3-LCQP"}}
      ]}}

The service checks to see if the request is authorized and if so, performs the operation and returns the result:¶

{
  "OperateResponse":{
    "Results":[{
        "CryptographicResultKeyAgreement":{
          "KeyAgreement":{
            "KeyAgreementECDH":{
              "Curve":"X448",
              "Result":"ODcTzgThPhguBD0DIbx6IwIuHRml4ZD7XI6x4NeXt
  WHlbKJvFJC6empaS2fTxmxCoFMCH9vDLOmA"}}}}
      ],
    "Status":201,
    "StatusDescription":"Operation completed successfully"}}

Future: Currently, the access catalog is encrypted under the service encryption key. It would be better to encrypt the catalog under an encryption key specified by the service during the process of account binding. This would allow a service to assign a unique encryption key to each account and limit access to that key to the hosts servicing that specific account.¶

6.6.1. Generate Key Shares

Generation of threshold key shares is planned but not currently supported.¶

6.6.2. Threshold Sign

Threshold signature is planned but not currently supported.¶

6.7. Messaging

Mesh Messaging is an asynchronous messaging service that allows exchange of information between devices connected to a Mesh account and between Mesh users.¶

To enable effective abuse mitigation, Mesh Messaging enforces a four-corner communication model in which all outbound and inbound messages pass through a Mesh Service which accredits and authorizes the messages on the user's behalf.¶

Figure 2: The Mesh Four Corner Messaging Model

The Post transaction is only used to exchange messages between services. The client sends and receives messages through interactions with the outbound and inbound spools of the account.¶

6.7.1. Sender.

To send a message, the client creates the Mesh Message structure, encapsulates it in a DARE Message and appends the message to the Outbound spool of the account using the Transact operation..¶

The DARE Message MUST be signed under the account signature key.¶

The Mesh Service receiving the message from the user's device MAY attempt immediate retransmission or queue it to be sent at a future time. Mesh Services SHOULD forward messages without undue delay.¶

6.7.2. Outbound Service

The Post transaction forwarding the message to the destination service carries the same payload as the original request but is authenticated by the service forwarding it. This authentication MAY be my means of either profile or ticket authentication.¶

>>>> Unfinished ProtocolPostServiceService¶

[Not Yet Implemented]¶

After the message has been sent, the service updates the message status on the outbound spool.¶

Services SHOULD implement Denial of Service mitigation strategies including limiting the maximum time taken to complete a transaction and refusing connections from clients that engage in patterns of behavior consistent with abuse.¶

The limitation in message size allows Mesh Services to aggressively time out connections that take too long to complete a transaction. A Mesh Service that hosted on a 10Mb/s link should be able to transfer 20 messages a second. If the service is taking more than 5 seconds to complete a transaction, either the source or the destination service is overloaded or the message itself is an attack.¶

Imposing hard constraints on Mesh Service performance requires deployments to scale and apply resources appropriately. If a service is attempting to transfer 100 messages simultaneously and 40% are taking 4 seconds or more, this indicates that the number of simultaneous transfers being attempted should be reduced. Contrawise, if 90% are completed in less than a second, the number of threads allocated to sending outbound messages might be increased.¶

6.7.3. Inbound Service

The inbound service MUST subject inbound messages to Access Control according to the credentials presented in the DARE Message payload.¶

After verifying the signature and checking that the key is properly accredited in accordance with site policy, the service applies authorization controls taking account of:¶

The accreditation of the sender¶
The accreditation of the transmitting Service¶
The type of Mesh Message being sent¶
User policy as specified in their Contact Catalog¶
Site policy.¶

6.7.4. Recipient

Messages are received by synchronizing the outbound spool.¶

8. Message Interactions

Message interactions are asynchronous interactions that occur between devices connected to the same account or between accounts.¶

All messages are signed by the sender and encrypted under the encryption key of the recipient if this is known to the sender.¶

8.1. Message PIN Interaction

The Message PIN Interaction is used to register and validate PIN codes used to authenticate certain transactions. This interaction allows a PIN code issued by one device to be consumed by another allowing for greater convenience in managing devices or contact exchange.¶

For example, Alice might delegate the PIN code issue privilege to her mobile device without delegating the administration privilege to that device. This would allow Alice to use her mobile device to initiate the connection of a large number of devices to her Mesh as her house is being built and approve them later using her administrative device.¶

Use of the Message PIN interaction is optional. An application that issues a PIN code to authenticate a message MAY store the PIN value within the application without persisting it to external storage.¶

Derivation of the SaltedPin, MessageId and Witness values from their respective inputs is described in the Schema Reference [draft-hallambaker-mesh-schema].¶

8.1.1. Registration

To register a PIN code to an Account, a device:¶

Generates the PIN code value¶
Calculates the SaltedPin value for the specified Action¶
Calculates the PinId binding the specified SaltedPin to the Account.¶
Creates and signs MessagePin containing the SaltedPin , Action and Account values with the MessageId value PinId.¶
Appends the MessagePin value to the Administration Spool of the Account.¶

Note that this construction provides limited protection against forgery attacks by a party with access to the MessagePin. A party with such access can use it to construct the witness value required to authenticate a request.¶

PIN Code values consist of an opaque sequence of octets represented as a UDF nonce value. Codes are presented in canonical UDF form, i.e. Base32 encoding separated into groups of 4 characters. The PIN value is converted to binary form for calculation of the SaltedPin, thus ensuring that the canonical form of the PIN value is used.¶

8.1.2. Authentication

The PIN Code value is passed out of band to a user who will enter it into a device to authenticate a request made to the issuer.¶

A request that MAY be validated by means of a PIN is a subclass of MessagePinValidated and contains the following fields:¶

AuthenticatedData: A DARE Envelope containing the data that is authenticated.¶
ClientNonce: A nonce value used to prevent certain replay attacks.¶
PinId: Digest value binding the SaltedPin to the Account.¶
PinWitness: Witness value calculated as KDF (Device.UDF + AccountAddress, ClientNonce)¶

The device uses the PIN code and Action identifier corresponding to the desired request to calculate the SaltedPin value in the same manner as during registration. This value is then used to calculate the PinId and PinWitness values.¶

8.1.3. Validation

The PIN code is validated by performing the steps of:¶

Calculating the SaltedPin value from the PIN code and Action¶
Calculating PinId from SaltedPin and Account¶
Retrieving a MessagePin from the Administration spool with the MessageId PinId.¶
Calculating the PinWitness value from SaltedPin, ClientNonce and AuthenticatedData and checking this matches the value specified in the message.¶
Performing the requested action.¶
Posting a Complete message to the Administration Spool of the Account marking the PIN code as used.¶

This process can fail at multiple points resulting in different error results:¶

PinInvalid: No PIN code is specified, the Pin code indicates an unsupported algorithm or the calculated PinWitness does not match the one specified by the request.¶
PinUsed: The PIN code has been used previously.¶
PinExpired: The PIN code is no longer valid.¶

Note that in the case that an attempt is made to reuse a PIN, it is not automatically the case that the first use of the PIN was the one that was valid and only the second attempt was invalid. Implementations SHOULD alert the user to the attempted re-use so that this possibility can be considered and appropriate action taken.¶

8.1.4. Example

Alice connects a device using a QR code presented by her administrative device.¶

The administration device creates a PIN code and records it to the Local spool. The message specifies the salted pin value used to verify attempts to use the PIN, the action for which it is authorized. Since this PIN has been issued to authorize a device connection, the roles for which the device are authorized as well. This allows the connection request to be accepted without asking for further input from the user.¶

{
  "MessagePin":{
    "Account":"alice@example.com",
    "Expires":"2023-06-29T17:00:45Z",
    "Automatic":true,
    "SaltedPin":"AA6H-GDQF-3QDF-B7MB-GBAO-RJ4O-ZTPI",
    "Action":"Device",
    "Roles":["threshold"
      ],
    "MessageId":"AAGD-BQIW-ZKOT-UAIT-U4EJ-XSKW-AWMK"}}

8.2. Completion Interaction

Completion messages are dummy messages that are added to a Mesh Spool to mark a change the status of messages previously posted. Any message that is in the inbound spool and has not been erased or redacted MAY be marked as read, unread or deleted. Any message in the outbound spool MAY be marked as sent, received or deleted.¶

Services MAY erase or redact messages in accordance with local site policy. Since messages are not removed from the spool on being marked deleted, they may be undeleted by marking them as read or unread. Marking a message deleted MAY make it more likely that the message will be removed if the sequence is subsequently purged.¶

After using the PIN code to authenticate connection of a device in the previous example, the corresponding MessagePin is marked as having been used by appending a completion message to the Local spool.¶

{
  "MessageComplete":{
    "References":[{
        "MessageId":"AAGD-BQIW-ZKOT-UAIT-U4EJ-XSKW-AWMK",
        "ResponseId":"MAQQ-DQZI-2WLP-3E5Y-IMGT-PLIE-MJ2S",
        "Relationship":"Closed"}
      ],
    "MessageId":"NDEO-PW6N-VT6V-ZLFQ-JIBW-VAU4-ROHO"}}

The completion message is added to the spool in the same upload transaction that adds the device to the device catalog. This ensures that both operations occur or neither occurs.¶

8.3. Contact Exchange Interaction

The contact exchange interaction is used to support unilateral or mutual exchange of contact information. Contact exchange has three functions in the Mesh:¶

To exchange public key information to allow encryption of messages sent to and verification of signatures on messages sent from the contact subject.¶
To exchange contact information allowing use of other communication protocols (e.g. telephone, SMS, xmpp, SMTP, OpenPGP, S/MIME, etc).¶
To request that the recipient grant privileges to accept certain types of messages from the contact subject.¶

Registration of the subject's contact information in a registry service eliminates the need for the first of these functions but not the other two. To prevent abuse, every Mesh Message is subject to access control and a Mesh service will only accept a message from a sender if there is an entry in the Threshold Catalog of the account that expressly permits delivery of messages of the specified type that are authenticated by an authorized signature key.¶

The communication of unsolicited information afforded by the contact exchange interaction is deliberately limited so that a majority of users can accept contact exchange requests without prior authorization. It is however likely that some users will receive a considerable volume of requests forcing them to require contact requests be authorized through some form of third party accreditation.¶

8.3.1. Remote

The Remote Contact Exchange transaction consists of a sequence of MessageContact messages sent from the initiator to the responder, responder to the initiator, etc. While there is in principle no limit on the number of messages exchanged, most exchanges will be completed in three exchanges or less:¶

Initiator to Responder: Contains Initiator contact data without authentication context from the exchange.¶
Responder to Initiator (optional): Contains Responder contact data authenticated under a PIN challenge presented in the previous message.¶
Initiator to Responder (optional): Contains Initiator contact data authenticated under a PIN challenge presented in the previous message.¶

Each message provides the recipient with additional information which MAY motivate the recipient to provide additional contact information to the sender.¶

{
  "MessageContact":{
    "Reply":true,
    "Subject":"alice@example.com",
    "PIN":"AAAZ-RZSW-ZMBI-A6R6-WTPY-INAA-OZLQ",
    "AuthenticatedData":[{
        "dig":"S512",
        "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJDb250YWN0UG
  Vyc29uIiwKICAiY3R5IjogImFwcGxpY2F0aW9uL21tbS9vYmplY3QiLAogICJDcmV
  hdGVkIjogIjIwMjMtMDYtMjhUMTc6MDA6MjZaIn0"},
      "ewogICJDb250YWN0UGVyc29uIjogewogICAgIkFuY2hvcnMiOiBbewogIC
  AgICAgICJVZGYiOiAiTURDUi1BMlVFLVNLUUEtM0hCRi1ZRk82LVZRNkgtRTcyWCI
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  AgICJFbnZlbG9wZUlkIjogIk1EQ1ItQTJVRS1TS1FBLTNIQkYtWUZPNi1WUTZILUU
  3MlgiLAogICAgICAgICAgICAiZGlnIjogIlM1MTIiLAogICAgICAgICAgICAiQ29u
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  IKICBsZUdGdGNHeGxMbU52YlNJc0NpQWdJQ0FpVTJWeWRtbGpaVlZrWmlJNklDSk5
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  d0tJQ0FnSUNKRmMyTnliM2RGYm1OeWVYQjBhVzl1SWpvCiAgZ2V3b2dJQ0FnSUNBa
  VZXUm1Jam9nSWsxRFYxTXRUVkEyVHkxYVdWQTJMVVpLVlRVdFFrTlFUUzFGVkVVME
  wKICBVaExOalVpTEFvZ0lDQWdJQ0FpVUhWaWJHbGpVR0Z5WVcxbGRHVnljeUk2SUh
  zS0lDQWdJQ0FnSUNBaVVIVgogIGliR2xqUzJWNVJVTkVTQ0k2SUhzS0lDQWdJQ0Fn
  SUNBZ0lDSmpjbllpT2lBaVdEUTBPQ0lzQ2lBZ0lDQWdJCiAgQ0FnSUNBaVVIVmliR
  2xqSWpvZ0lrcGtjelpVYldod2VFdFdXVlZKTVVsaU5EbDZlVXhGVTBkMk9FY3RURW
  gKICBhYldaRVl6UndZMnhYVldOWE9VMU9TbXN6T0ZRS0lDQjFhbWh3TUdsaU5UVjZ
  aVGhmVmpjMVIwUkNiekIyVgogIFVFaWZYMTlMQW9nSUNBZ0lrRmtiV2x1YVhOMGNt
  RjBiM0pUYVdkdVlYUjFjbVVpT2lCN0NpQWdJQ0FnSUNKCiAgVlpHWWlPaUFpVFVJe
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  kKICBDQWdJQ0pRZFdKc2FXTlFZWEpoYldWMFpYSnpJam9nZXdvZ0lDQWdJQ0FnSUN
  KUWRXSnNhV05MWlhsRlEwUgogIElJam9nZXdvZ0lDQWdJQ0FnSUNBZ0ltTnlkaUk2
  SUNKRlpEUTBPQ0lzQ2lBZ0lDQWdJQ0FnSUNBaVVIVmliCiAgR2xqSWpvZ0lscFJhV
  FZxYUhVd05FcHdkRWQ0TkhsUlkwbDBPVTlVY1dzNE16ZEtWMmRIY1ZGUVRsWlhWVk
  oKICBST1Y5V2VHY3RZM1pxWm5BS0lDQmFOamx5U1ZZMFJqQkZhekZJYm5rMFkzbHl
  RVkpxUjBFaWZYMTlMQW9nSQogIENBZ0lrTnZiVzF2YmtWdVkzSjVjSFJwYjI0aU9p
  QjdDaUFnSUNBZ0lDSlZaR1lpT2lBaVRVUkxSUzFETjAxCiAgRkxUSkNORmN0VlVsR
  FR5MVdWalEzTFRKVFRVc3RTbG95V0NJc0NpQWdJQ0FnSUNKUWRXSnNhV05RWVhKaG
  IKICBXVjBaWEp6SWpvZ2V3b2dJQ0FnSUNBZ0lDSlFkV0pzYVdOTFpYbEZRMFJJSWp
  vZ2V3b2dJQ0FnSUNBZ0lDQQogIGdJbU55ZGlJNklDSllORFE0SWl3S0lDQWdJQ0Fn
  SUNBZ0lDSlFkV0pzYVdNaU9pQWljVTV5YzJkaGNqWllZCiAgMXBPTVZoaVVXdFZkR
  2hyTlhCVlYzSlZWM040TVdkRVUwSnNXQzFFUzFFMExUTkNRalJIVkZSbFpRb2dJRF
  IKICBqZUc4NVYybGFUMlJwUldacGFqTkdYMlpvZDFKVFFTSjlmWDBzQ2lBZ0lDQWl
  RMjl0Ylc5dVFYVjBhR1Z1ZAogIEdsallYUnBiMjRpT2lCN0NpQWdJQ0FnSUNKVlpH
  WWlPaUFpVFVJMFFTMUNXVkpPTFZSWFJVZ3RORTFLTWkxCiAgQ00wMU1MVFl5VDBZd
  FFrWlVNeUlzQ2lBZ0lDQWdJQ0pRZFdKc2FXTlFZWEpoYldWMFpYSnpJam9nZXdvZ0
  kKICBDQWdJQ0FnSUNKUWRXSnNhV05MWlhsRlEwUklJam9nZXdvZ0lDQWdJQ0FnSUN
  BZ0ltTnlkaUk2SUNKWU5EUQogIDRJaXdLSUNBZ0lDQWdJQ0FnSUNKUWRXSnNhV01p
  T2lBaWVGUTVhbXgzVVMxSU5FTmZUWGh1YlZKYVVFbzBRCiAgekl4TVdwdlUyeGZhb
  FF4VWxod1JIUlRYME5qTlRSVWRtUTBUSFZMVHdvZ0lFazRORVJZWW5oRFRFdEhOR0
  UKICAyTmpSUFRHa3ljSGx6UVNKOWZYMHNDaUFnSUNBaVVISnZabWxzWlZOcFoyNWh
  kSFZ5WlNJNklIc0tJQ0FnSQogIENBZ0lsVmtaaUk2SUNKTlJFTlNMVUV5VlVVdFUw
  dFJRUzB6U0VKR0xWbEdUell0VmxFMlNDMUZOekpZSWl3CiAgS0lDQWdJQ0FnSWxCM
  VlteHBZMUJoY21GdFpYUmxjbk1pT2lCN0NpQWdJQ0FnSUNBZ0lsQjFZbXhwWTB0bG
  UKICBVVkRSRWdpT2lCN0NpQWdJQ0FnSUNBZ0lDQWlZM0oySWpvZ0lrVmtORFE0SWl
  3S0lDQWdJQ0FnSUNBZ0lDSgogIFFkV0pzYVdNaU9pQWlZa2RyVEMxUFpFNXBhMVV6
  TlRJdGIwbG1iV0ZYVWtsdmEzRlJhalE0WVZVeU5FMVZiCiAgRzh4WjNsWUxXRXpkV
  FF5YkZaRmJRb2dJR1Z3TVc0eVdsQm1SWG93TVZOTFIwUlJkMGQ2WkZKWFFTSjlmWD
  EKICA5ZlEiLAogICAgICAgICAgewogICAgICAgICAgICAic2lnbmF0dXJlcyI6IFt
  7CiAgICAgICAgICAgICAgICAiYWxnIjogIlM1MTIiLAogICAgICAgICAgICAgICAg
  ImtpZCI6ICJNRENSLUEyVUUtU0tRQS0zSEJGLVlGTzYtVlE2SC1FNzJYIiwKICAgI
  CAgICAgICAgICAgICJzaWduYXR1cmUiOiAiTXc2M3k1NmF6SmxKdWJZV2RLS3Vxdn
  c1S0VkQUdkX1JCU2llRkw4SlgyZ1lBdWl4agogIGdwWmI0RVZ1VWRqY29rVFh2c2R
  mb0Q0QkNZQXZYQ3hkYjNmUERxUWpVN2dRTjFYR2VCdXRzRmlIWW0tTlhTCiAgbE9H
  ZEkwLVFSYlhuX1ZkR0g1M1g5OG5KRVM4OG1sOFRncGlMS3dnd0EifV0sCiAgICAgI
  CAgICAgICJQYXlsb2FkRGlnZXN0IjogInJBbExNR2hvZExOZ3ZxSnI4ZjZmeUNXRz
  lkZVpxcDRPckVLMDdCVzNQWTd3VwogIE9Gb05EN09hQ0xPVENidFNqcUhyQ245cmc
  yWG9HWEZjRGVHMzNpRkRRIn1dLAogICAgICAgICJQcm90b2NvbHMiOiBbewogICAg
  ICAgICAgICAiUHJvdG9jb2wiOiAibW1tIn1dfV19fQ",
      {
        "signatures":[{
            "alg":"S512",
            "kid":"MBVB-YEQA-JOGK-LZPE-PKGH-B7LX-NLS6",
            "signature":"z1ReikE82PgJmCqtZQVd-VIMRSlCXkXNcbDa_j3-
  xgmf0GkpkPFt5d1RMhZ_9WmIm_m5RXqxsH-A_ik3lsJtZBjOZQ1sMirmnbWhNBivg
  bjZfaOmKXYqfyF5jewLnvmpWd7ABocKR0KZay_RQquFGRwA"}
          ],
        "PayloadDigest":"1vGosK3Xgx_S2PxOQbgyNPo25VTael1tW_cVtLuU
  csywws3Y_dzMatRSyaN1xBaUvP_4SUc5AhPyMip6ERk7eg"}
      ],
    "MessageId":"NAQL-6SJP-VLQD-7BNN-EB6L-DLQQ-K2ZE",
    "Sender":"bob@example.com",
    "Recipient":"alice@example.com"}}

The Mesh Contact Exchange transaction does not provide for validation of the contact information beyond the binding to the Mesh Account Address used to perform the exchange.¶

8.3.2. PIN

Contact exchange requests MAY be authenticated by a PIN code. Initial contact exchange requests SHOULD include a PIN code value that can be used to authenticate a response (if given). PIN codes MAY also be exchanged out of band.¶

A MessageContact authenticated by means of a PIN code is authenticated as described in the PIN Interaction section above.¶

8.3.3. EARL

A MessageContact message MAY be published as an EARL. This allows contact data to be presented to the recipient on a printed document such as a business card in machine readable format such as a QR code.¶

8.4. Group Invitation

The GroupInvitation interaction is used to invite a recipient to join a Mesh Group. The interaction is essentially a form of contact exchange except that a sender SHOULD NOT send group invitations unless there is an existing relationship. Thus the 'first trust' issues intrinsic to the contact exchange interaction do not apply.¶

The message specifies the group name and the contact entry for the group. The contact entry includes the CapabilityDecryptServiced used to decrypt messages sent to the group when combined with information provided by the threshold service for the group.¶

Receipt of a GroupInvitation message does not require a response.¶

>>>> Unfinished ProtocolGroupInvite¶

Missing example 14

8.5. Confirmation Interaction

The confirmation interaction consists of a RequestConfirmation message from the initiator followed by a ResponseConfirmation from the responder.¶

The RequestConfirmation message specifies the action that is requested.¶

The ResponseConfirmation message contains the enveloped RequestConfirmation message signed by the initiator and the disposition of the responder, Accept = true if the request is accepted and Accept = false otherwise.¶

The service sends out the following request:¶

{
  "RequestConfirmation":{
    "Text":"start",
    "MessageId":"NDTU-IIPR-L5SK-L6CZ-JJGF-XA6L-565H",
    "Sender":"console@example.com",
    "Recipient":"alice@example.com"}}

Alice accepts the request and returns the following response:¶

{
  "ResponseConfirmation":{
    "Request":[{
        "EnvelopeId":"MBRF-HV6Z-UAXU-IUP5-4B6A-XIRE-UHGZ",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJORFRVLUlJUFItTD
  VTSy1MNkNaLUpKR0YtWEE2TC01NjVIIiwKICAiTWVzc2FnZVR5cGUiOiAiUmVxdWV
  zdENvbmZpcm1hdGlvbiIsCiAgImN0eSI6ICJhcHBsaWNhdGlvbi9tbW0vb2JqZWN0
  IiwKICAiQ3JlYXRlZCI6ICIyMDIzLTA2LTI4VDE3OjAwOjM0WiJ9",
        "SequenceInfo":{
          "Index":7,
          "TreePosition":6224},
        "Received":"2023-06-28T17:00:34Z",
        "signatures":[{
            "alg":"S512",
            "kid":"MC3L-5Y6X-X2WA-6OAI-S56F-HNEV-R32R",
            "signature":"351CsK0q7VJWGm-1YuvzzxWRCTVOCqedM6F9CQ9j
  kCflfv1lJz43P6xg-xB1OQRdc6e92zgfv3-ApGteIPtv5vylpKo6EgzXGmpMZC3zA
  hymQesHMqsfGW-QyVk7460UhBq3sdLg1QCX01_Q_TgHUzIA"}
          ],
        "PayloadDigest":"hrg74rSm8V5zkdPOkn16W30g9lP4zANIh1OhtHp_
  XDwTGLtrDyDbp2_6Y3HMVylrGXB29fxxf0kppinWTsOHjg"},
      "",
      {}
      ],
    "Accept":true,
    "MessageId":"MB7S-ZUPK-XJ6Q-N42Y-4UTW-7CQI-33HL",
    "Sender":"alice@example.com",
    "Recipient":"console@example.com"}}

9. Device Connection Interactions

Connection of a device to a Mesh Account combines synchronous and asynchronous elements and therefore uses a combination of Mesh Service Protocol and Mesh Messaging interactions.¶

Four connection interactions are currently defined support connection of devices with different affordances:¶

Witness Authenticated: For connecting devices that provide data entry and display affordances and are connected to a network. The account the device is to be connected to is entered into the device which displays a witness code. This code is then compared with a code displayed on the administration device to authenticate the request, after which both devices can complete the interaction.¶
PIN Authenticated: A variation of the Witness Authenticated interaction in which the connection process is initiated by creating a PIN value which is communicated to the device by some out of band means and used to authenticate the connection request.¶
Dynamic QR Code (PIN) Authenticated: For connecting devices that provide a camera affordance. The user sets the administration device into 'add device' mode, causing a QR code to be displayed. The QR code is scanned by the device being connected after which both devices can complete the interaction. Implementation of this mechanism is identical to the PIN authenticated scheme except that the PIN code is presented to the connecting device by means of a QR code.¶
Preconfigured (Static QR Code Authenticated): For connecting devices that have been preconfigured with a device profile identified by means of a QR Code containing an EARL. The QR code is scanned by the administration device after which both devices can complete the interaction.¶

Each of these interactions provide strong mutual authentication with minimal user effort.¶

The witness authenticated connection interaction is intended for use in cases in which the device is already connected to a network. The QR code interactions are intended to provide support for acquisition of networking capabilities as part of the connection process. These functions are not currently specified. The Static QR Code Authenticated interaction is intended to support Internet of Things (IoT) devices which provide minimal interaction affordances.¶

In each case, the objectives of the device connection interaction are the same:¶

Mutually authenticate the onboarding device and the Mesh such that the connection interaction only completes if both sides acquire the authentic profile of the other.¶
To provision the onboarding device with the Mesh ProfileAccount, and an ActivationDevice and ConnectionDevice record allowing the device to interact as a member of the Mesh with the set of rights specified by the user.¶
To create a CataloguedDevice record and append it to the Device catalog of the account to allow the device to be managed within that account.¶
(optional) to acquire networking capabilities to allow the above to be completed.¶

The connection of the device to the Mesh Account is achieved through the creation of the ActivationDevice, ConnectionDevice and CataloguedDevice records described in [draft-hallambaker-mesh-schema]. These are created by the administration device in the third phase of each of the connection interactions described below and acquired by the onboarding device in the fourth phase.¶

9.1. Witness/PIN Authenticated

The witness authenticated, PIN authenticated, and Dynamic QR code interactions all follow a common interaction pattern.¶

The Dynamic QR Code (PIN) Authenticated interaction comprises four phases as follows:¶

Phase 1: Issue of PIN credential (PIN and Dynamic QR code only)

A PIN code is created and registered with the PIN Registration interaction described earlier and transmitted to the user by an out of band communication. In the case of the Dynamic QR code interaction, this is a QR code that is scanned by the connecting device.¶

Phase 2: Onboarding Device Request to Service

The onboarding device creates a RequestConnect message. In the PIN authenticated and Dynamic QR Code interactions, the RequestConnect is authenticated by the Device Authentication key and the PIN issued earlier. In the Witness Authenticated interaction, it is authenticated by the Device Authentication key alone.¶

The onboarding device presents the RequestConnect message to the service by means of a Connect operation to the service servicing the account. This results in the exchange of the account and device profiles and the computation of a witness value from the two profile fingerprints and two nonce values specified by the onboarding device and the service. An AcknowledgeConnection message is posted to the Inbound spool of the account and returned to the connecting device.¶

Phase 3: Administration Device Acceptance

The account holder authenticates RequestConnect message and uses an administrative device to accept or reject the connection request.¶

If the RequestConnect message has been authenticated by a PIN code, the connection request can be accepted automatically without additional user interaction.¶

Phase 4: Onboarding Device Completion

The onboarding device periodically polls the service for acceptance of the request by the administration device using the Complete transaction.¶

The use of the PIN code to authenticate the request message is shown in $$$$.¶

The PIN code MAY be presented to the onboarding device in any format accepted by the device. Administration MAY support presentation of the account address PIN code as a URI code. Administration devices SHOULD support presentation of the account address PIN code as a QR code containing the corresponding URI.¶

9.1.1. Phase 1:

Alice> meshman account pin /threshold
PIN=AAKI-IIAD-GQ3H-JUY3-SXZN-PENW-PQ
 (Expires=2023-06-29T17:00:45Z)

The registration of this PIN value was shown earlier in section $$$¶

The URI containing the account address and PIN is:¶

mcu://alice@example.com/AAKI-IIAD-GQ3H-JUY3-SXZN-PENW-PQ

9.1.2. Phase 2:

The onboarding device scans the QR code to obtain the account address and PIN code. The PIN code is used to authenticate a connection request:¶

Alice3> meshman device request alice@example.com /pin ^
    AAKI-IIAD-GQ3H-JUY3-SXZN-PENW-PQ
   Device UDF = MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3
   Witness value = GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5

The device generates a RequestConnect message as follows:¶

{
  "RequestConnection":{
    "AccountAddress":"alice@example.com",
    "AuthenticatedData":[{
        "EnvelopeId":"MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQlhWLVNJQkYtNF
  hFVy00RVZFLTdVUlctRjZWVC1OVFgzIiwKICAiTWVzc2FnZVR5cGUiOiAiUHJvZml
  sZURldmljZSIsCiAgImN0eSI6ICJhcHBsaWNhdGlvbi9tbW0vb2JqZWN0IiwKICAi
  Q3JlYXRlZCI6ICIyMDIzLTA2LTI4VDE3OjAwOjQ1WiJ9"},
      "ewogICJQcm9maWxlRGV2aWNlIjogewogICAgIkVuY3J5cHRpb24iOiB7Ci
  AgICAgICJVZGYiOiAiTUJYVS03QUo1LUpQS08tR0pXTi1LREVBLVhHR1ItQ0ZJWSI
  sCiAgICAgICJQdWJsaWNQYXJhbWV0ZXJzIjogewogICAgICAgICJQdWJsaWNLZXlF
  Q0RIIjogewogICAgICAgICAgImNydiI6ICJYNDQ4IiwKICAgICAgICAgICJQdWJsa
  WMiOiAiVjFNaHZFWlhzMlk5bzMtd1hWMm1kT3AycVkyMGxWZ21NQzVyRTgxRTNDRW
  hDU1pSX0h0eQogIDZLN1RMLXcxd3EtY1h1Y09uZUY2MURrQSJ9fX0sCiAgICAiU2l
  nbmF0dXJlIjogewogICAgICAiVWRmIjogIk1DNlItU0ZEQS1PWVRKLUdLNkstRklW
  Ti1PTjVHLUkzUEUiLAogICAgICAiUHVibGljUGFyYW1ldGVycyI6IHsKICAgICAgI
  CAiUHVibGljS2V5RUNESCI6IHsKICAgICAgICAgICJjcnYiOiAiRWQ0NDgiLAogIC
  AgICAgICAgIlB1YmxpYyI6ICJNNUUtek1GaDRVOTBlaEtVc2JkMmlDWVprUGdFUnF
  lTk8wUm40UlRMZXpsWS1fRWNjVGxFCiAgNUNpbzNycnJrU2xYc2pybmV6Z25HSllB
  In19fSwKICAgICJBdXRoZW50aWNhdGlvbiI6IHsKICAgICAgIlVkZiI6ICJNQ0xLL
  VpUTFQtUkFDNi1OTkpFLTUzSUQtVjQySC1KU0lBIiwKICAgICAgIlB1YmxpY1Bhcm
  FtZXRlcnMiOiB7CiAgICAgICAgIlB1YmxpY0tleUVDREgiOiB7CiAgICAgICAgICA
  iY3J2IjogIlg0NDgiLAogICAgICAgICAgIlB1YmxpYyI6ICJDb1VqdENFVEdLWGpP
  d2htRkw0UU9zZlVBNEpZeXI0RFpBTXowV0R1bEU2aGJXMVF2N3dBCiAgR0FYVFBwN
  0s0dG9VZ0YwSGVuT3BZWTZBIn19fSwKICAgICJQcm9maWxlU2lnbmF0dXJlIjogew
  ogICAgICAiVWRmIjogIk1CWFYtU0lCRi00WEVXLTRFVkUtN1VSVy1GNlZULU5UWDM
  iLAogICAgICAiUHVibGljUGFyYW1ldGVycyI6IHsKICAgICAgICAiUHVibGljS2V5
  RUNESCI6IHsKICAgICAgICAgICJjcnYiOiAiRWQ0NDgiLAogICAgICAgICAgIlB1Y
  mxpYyI6ICJiRVpmVTdLRENRRnFhQjN3Mll0SWItX3M5elNhUTBOXy1FQ1dselcyaW
  0xZkJLcTBvY1hSCiAgSGtHOFJGOWd6Q29pZzd1TExKYUsyVUVBIn19fX19",
      {
        "signatures":[{
            "alg":"S512",
            "kid":"MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3",
            "signature":"VQYBbRl6xm-Tzo-uGkOd53RKQrn1KE6so5IEhmwB
  OQg49uJtfjaJYZTxC1OfQ3z1u2COGayDIRAAvFkA4vO7JFpk6IOQ1tRbwHau-QZr0
  0ey9zzjj8cWnjanozfSXM1b7T08DL7UGO4dDqGaGqF5DxgA"}
          ],
        "PayloadDigest":"bGq-cj9J7OHsfvhk0hXsOwtP6C6lYOl0Qf8ZfetK
  7FBbMJYQY5woLCFoXXm91Rg6cQgOIuS-WWncODSrTlrOUg"}
      ],
    "ClientNonce":"T6yDJkuH59dB0w2WPLp2vA",
    "PinId":"AAGD-BQIW-ZKOT-UAIT-U4EJ-XSKW-AWMK",
    "PinWitness":"OgylccDOqR9SRRoG7QqYAQoyp7gjc8Em50QPqdjs17bq7pS
  9Omy66EY3wicHryKNq6dRkmjpkRNYMxfADriyJg",
    "MessageId":"NCO5-AV7A-DZYY-A5JD-GGWI-KH3Y-OJND"}}

The service receives the conenct request and authenticates the message under the device key. The service cannot authenticate the message under the PIN code because that is not know to the service as the service cannot decrypt the local spool.¶

Having authenticated the connect request, the service generates a random nonce value. The random nonce together with the device and account profiles are used to calculate the witness value.¶

The AcknowledgeConnection message is created by the service:¶

{
  "AcknowledgeConnection":{
    "EnvelopedRequestConnection":[{
        "EnvelopeId":"MBDW-KFHR-OR66-U6CR-CCEV-N4DD-MXXQ",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJOQ081LUFWN0EtRF
  pZWS1BNUpELUdHV0ktS0gzWS1PSk5EIiwKICAiTWVzc2FnZVR5cGUiOiAiUmVxdWV
  zdENvbm5lY3Rpb24iLAogICJjdHkiOiAiYXBwbGljYXRpb24vbW1tL29iamVjdCIs
  CiAgIkNyZWF0ZWQiOiAiMjAyMy0wNi0yOFQxNzowMDo0NVoifQ"},
      "ewogICJSZXF1ZXN0Q29ubmVjdGlvbiI6IHsKICAgICJBY2NvdW50QWRkcm
  VzcyI6ICJhbGljZUBleGFtcGxlLmNvbSIsCiAgICAiQXV0aGVudGljYXRlZERhdGE
  iOiBbewogICAgICAgICJFbnZlbG9wZUlkIjogIk1CWFYtU0lCRi00WEVXLTRFVkUt
  N1VSVy1GNlZULU5UWDMiLAogICAgICAgICJkaWciOiAiUzUxMiIsCiAgICAgICAgI
  kNvbnRlbnRNZXRhRGF0YSI6ICJld29nSUNKVmJtbHhkV1ZKWkNJNklDSk5RbGhXTF
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      ],
    "ServerNonce":"RwIahgJVCIL2S6si9w6JPA",
    "Witness":"GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5",
    "MessageId":"GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5"}}

The AcknowledgeConnection message is appended to the Inbound spool of the account to which connection was requested so that the user can approve the request. The ConnectResponse message is returned to the device containing the AcknowledgeConnection message and the profile of the account.¶

The device generates the witness value, verifies it against the value provided by the server and presents it to the user as seen in the console example above.¶

9.1.3. Phase 3:

The user synchronizes their pending messages:¶

Alice> meshman message pending
MessageID: GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5
        Connection Request::
        MessageID: GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5
        To:  From:
        Device:  MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3
        Witness: GSJR-OHU5-HHXO-KURY-ST4B-HVBA-7PV5
MessageID: NCUD-3ROZ-X7UK-MMRA-CTYI-YHOE-UJCM
MessageID: NDTU-IIPR-L5SK-L6CZ-JJGF-XA6L-565H
        Confirmation Request::
        MessageID: NDTU-IIPR-L5SK-L6CZ-JJGF-XA6L-565H
        To: alice@example.com From: console@example.com
        Text: start
MessageID: ND4Y-TGCW-2QO3-KIQM-N3AN-DMIO-2CFT
MessageID: NCVI-FDFU-ZYPN-5274-YBHY-V6WI-FTEJ
MessageID: NA7V-2XT2-2ZJO-IDUY-GK6W-CTVX-HDDM
Alice> meshman account sync /auto

The administration device determines that the device connection request is authenticated by a PIN code. The PIN code is retrieved and the message authenticated. This is shown in the PIN registration interation example in section $$$ above.¶

Bug: This command is currently showing superflous pending messages due to the failure to clear messages processed in earlier examples.¶

The Cataloged device record is created from the public key values corresponding to the combination of the public keys in the device profile and those defined by the activation.¶

This is returned to the onboarding device by wrapping it in a RespondConnection message posted to the local spool of the account.¶

{
  "RespondConnection":{
    "Result":"Accept",
    "CatalogedDevice":{
      "DeviceUdf":"MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3",
      "EnvelopedProfileUser":[{
          "EnvelopeId":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
          "dig":"S512",
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  VDMlFBIn19fX19",
        {
          "signatures":[{
              "alg":"S512",
              "kid":"MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2",
              "signature":"lhicUvvDwdI2cJGDmMDmEYhZIDOp0be5IjblZG
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            ],
          "PayloadDigest":"hg5Z9SBDuRlEje8R3-0KZFBNHW738w1k0ZvF-n
  NJKZ4acEZKjmAwOzx3cbf6HXJoWy3eLs4BqYdhXQWkftir1g"}
        ],
      "EnvelopedProfileDevice":[{
          "EnvelopeId":"MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3",
          "dig":"S512",
          "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQlhWLVNJQkYt
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        {
          "signatures":[{
              "alg":"S512",
              "kid":"MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3",
              "signature":"VQYBbRl6xm-Tzo-uGkOd53RKQrn1KE6so5IEhm
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            ],
          "PayloadDigest":"bGq-cj9J7OHsfvhk0hXsOwtP6C6lYOl0Qf8Zfe
  tK7FBbMJYQY5woLCFoXXm91Rg6cQgOIuS-WWncODSrTlrOUg"}
        ],
      "EnvelopedConnectionService":[{
          "dig":"S512",
          "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJDb25uZWN0
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        {
          "signatures":[{
              "alg":"S512",
              "kid":"MBL5-JSN3-V56Q-4ULY-GY7X-GM3V-KVPZ",
              "signature":"sSKVaJqQ-yMmJHluDeFYbl8RT0IadGzoB0mxYv
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            ],
          "PayloadDigest":"vhymfJDU2ZqYtw9rC5C9dcXzW68bJrKzcOpop8
  ygUAul12Os9Dfpfvv_xR_rSVnAMhH10u3aLHXkEj1clP-gUA"}
        ],
      "EnvelopedConnectionDevice":[{
          "dig":"S512",
          "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJDb25uZWN0
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        {
          "signatures":[{
              "alg":"S512",
              "kid":"MBL5-JSN3-V56Q-4ULY-GY7X-GM3V-KVPZ",
              "signature":"qxPr1aJDCkaAnD5_j41aMXmQeqQQtk0h3mnZG9
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              "witness":"QQQrqg4a5Y3piY70Mg-K9o6tojViA-xSVXqv2gdV
  -r0"}
            ],
          "PayloadDigest":"njF6X87ZqBPxVDQb527JK1cr3rPAyMgUCUk6Qx
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        ],
      "ApplicationEntries":[{
          "ApplicationEntrySsh":{
            "EnvelopedActivation":[{
                "enc":"A256CBC",
                "kid":"EBQC-JSUS-ARTD-I7L6-KTPV-TZQG-P46Y",
                "Salt":"1ZSrwDiQwawYDnDD7lRzVQ",
                "recipients":[{
                    "kid":"MCDU-FYDX-C7IH-RSBJ-7L6P-JK4H-AFRM",
                    "epk":{
                      "PublicKeyECDH":{
                        "crv":"X448",
                        "Public":"nwajSJCeuM0S0RGBctttS73ZxN_r0tF
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                    "wmk":"L8JVTz314UgAd7L15URGrq2yp0XFG5kthI43ZO
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                  ],
                "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJBY3
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              ],
            "Identifier":"MAOY-3KTL-BIW6-BS7V-EANA-AZTL-5Q2Y"}}
        ]},
    "MessageId":"MAQQ-DQZI-2WLP-3E5Y-IMGT-PLIE-MJ2S"}}

9.1.4. Phase 4

The device periodically polls for completion of the connection request using the Complete transaction.¶

To provide a final check on the process, the command line tool presents the UDF of the account profile to which the device has connected if successful:¶

Alice3> meshman device complete
   Device UDF = MBXV-SIBF-4XEW-4EVE-7URW-F6VT-NTX3
   Account = alice@example.com
   Account UDF = MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2
Alice3> meshman account sync

The completion request specifies the witness value for the transaction whose completion is being queried:¶

{
  "CompleteRequest":{
    "AccountAddress":"alice@example.com",
    "ResponseID":"MAQQ-DQZI-2WLP-3E5Y-IMGT-PLIE-MJ2S"}}

The Service responds to the complete request by checking to see if an entry has been added to the local spool. If so, this contains the RespondConnection message created by the administration device.¶

9.2. Preconfigured (Static QR Code)

The preconfigured device connection interaction is used to connect devices that lack affordances such as a display or a keyboard. It is also known as the static QR code interaction because a static QR code printed on the device itself is used to connect it to a user's account.¶

Future: Note that this interaction is likely to be changed substantially in future revisions of the specification and the Claim/PollClaim mechanism removed and replaced with a messaging based approach.¶

The interaction has five phases:¶

Phase 1: Preconfiguration: The device to be onboarded is preconfigured with a ProfileDevice and private key information and a DeviceDescription posted to a publication service. This process is typically performed during manufacture. An EARL providing the ability to locate and decrypt the description is printed on the device itself as a QR code.¶
Phase 2: Device description acquisition: The administration device acquiring the onboarding device scans the QR code on the device and uses this information to obtain the device description by means of a Claim operation described above as described in the Device Description.¶
Phase 3: Administration Device Acceptance: This phase is performed in the same manner as the Dynamic QR Code (PIN) Authenticated interaction except that the administration device MAY advise the device that a connection request is being made by additional means described in the device description (e.g. WiFi, Bluetooth).¶
Phase 4: Poll Claim Notification: When connected to a network, the preconfigured device periodically attempts to poll the connection sources specified to find out if there is a pending request. If a connection request is posted, the device decrypts it to allow it to complete the connection process.¶
Phase 5: Onboarding Device Completion: This phase is performed in the same manner as the Dynamic QR Code (PIN) Authenticated interaction except that the administration device requires notice that of the pending connection request.¶

The main differences between this connection interaction and the witness/PIN connection interactions are that the device is preconfigured with the device profile at the time of manufacture and the onboarding device MAY be acquiring network configuration information during the connection process.¶

9.2.1. Phase 1

The manufacturer preconfigures the device¶

Maker> meshman device preconfig
Device UDF: MBAI-IMKY-GI2T-D472-4VP5-SKRF-ZXYW
File: ECHI-CYLR-Y22Q-6OME-OAWV-WIQD-YM.medk

This results in the creation of a primary secret which is used to compute a ProfileDevice and corresponding connection records signed by the manufacturer's administrator key.¶

The data is combined to create a DevicePreconfiguration record that is provisioned to the firmware of the device being preconfigured.¶

{
  "DevicePreconfigurationPrivate":{
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        "dig":"S512",
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      {
        "signatures":[{
            "alg":"S512",
            "kid":"MAN2-ANEE-HJR4-I4T2-PKID-AZ4K-ESR4",
            "signature":"CUZYibn1PlgpCZuoqiKFZT1AKXDFe3EEmuSaTKoo
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          ],
        "PayloadDigest":"VHfvwZ_1GC1Q40Q1-Qv2rZatLkVyEiGTjZi7-JMN
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      ],
    "EnvelopedConnectionService":[{
        "dig":"S512",
        "ContentMetaData":"ewogICJNZXNzYWdlVHlwZSI6ICJDb25uZWN0aW
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      {
        "signatures":[{
            "alg":"S512",
            "kid":"MAN2-ANEE-HJR4-I4T2-PKID-AZ4K-ESR4",
            "signature":"wYdQgPUrZcRuEvtZX55jZ-5aTnf5xN1TZ6pNHTD1
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          ],
        "PayloadDigest":"YyVytW08cXC2UlAnQgNVkhi6_2ab5Gmy90WzFzBG
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      ],
    "PrivateKey":{
      "PrivateKeyUDF":{
        "PrivateValue":"ZAAQ-BIPI-QZV3-UXRZ-TRIO-S5XC-GEOJ-GELH-TXM
6-CBIN-QKF3-AWWC-HTOO-DJOG",
        "KeyType":"MeshProfileDevice"}},
    "ConnectUri":"mcu://maker@example.com/ECHI-CYLR-Y22Q-6OME-OAWV-
WIQD-YM",
    "EnvelopedProfileDevice":[{
        "EnvelopeId":"MBAI-IMKY-GI2T-D472-4VP5-SKRF-ZXYW",
        "dig":"S512",
        "ContentMetaData":"ewogICJVbmlxdWVJZCI6ICJNQkFJLUlNS1ktR0
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  RUNESCI6IHsKICAgICAgICAgICJjcnYiOiAiRWQ0NDgiLAogICAgICAgICAgIlB1Y
  mxpYyI6ICJkdTBFenhUdEZWa3BqWnphTi13LXBkRlFZMUpPWDRrQmlyX0pVUEdoQ3
  M3SzlELUpqTmV1CiAgNjdtMDcxR3AxSG9yZF9LeUJWSW8wWmtBIn19fX19",
      {
        "signatures":[{
            "alg":"S512",
            "kid":"MBAI-IMKY-GI2T-D472-4VP5-SKRF-ZXYW",
            "signature":"7ECNMccaM24RWFOoJJVU55zb1XfgLFisbc15VIVd
  B_k6xeVGmpchZtgVrdeDjHgpesIqgJmbB7yAdPoIEusSu8pgY_Oc6BjMARJYAS9YW
  bfE4UX2HBlWViyY7I2RUM0_VvcOgt6Fc3XMXCtvbsAG4gwA"}
          ],
        "PayloadDigest":"xalDY6zOXjHmqlXWGKty0QkSsPfDQ5tuDHY-Tm8R
  e7UuxEfjvZnpTBtes9Etx86yn55D24AGSF199ejrRu8o5A"}
      ]}}

An EARL is created specifying the means by which an administration device can acquire the information required to complete a connection to the device:¶

QR = {Connect.ConnectEARL}

The preconfigured ProfileDevice is encrypted under the encryption key and published to the location key derived from the EARL.¶

9.2.2. Phase 2 & 3

The administration device scans the QR code and obtains the Device Description using the Claim operation as shown in section $$$$. The administration device creates the ActivationDevice and CatalogedDevice records and populates the service as before.¶

Alice> meshman account connect ^
    mcu://maker@example.com/ECHI-CYLR-Y22Q-6OME-OAWV-WIQD-YM /web

9.2.3. Phase 4

The device polls the publication service until a claim message is returned.¶

Alice4> meshman device complete
   Device UDF = MBAI-IMKY-GI2T-D472-4VP5-SKRF-ZXYW
   Account = alice@example.com
   Account UDF = MB3T-WIPZ-JRCW-QZFM-SCQL-OVVO-AHO2

9.2.4. Phase 5

Having been advised that an account has published a claim to bind to it, the device posts a connection Complete request to the specified account and completes the connection process as before.¶

10. Protocol Schema

HTTP Well Known Service Prefix: /.well-known/mmm

Every Mesh Portal Service transaction consists of exactly one request followed by exactly one response. Mesh Service transactions MAY cause modification of the data stored in the Mesh Service or the Mesh itself but do not cause changes to the connection state. The protocol itself is thus idempotent. There is no set sequence in which operations are required to be performed. It is not necessary to perform a Hello transaction prior to any other transaction.¶

10.1. Request Messages

A Mesh Portal Service request consists of a payload object that inherits from the MeshRequest class. When using the HTTP binding, the request MUST specify the portal DNS address in the HTTP Host field.¶

10.1.1. Message: MeshRequest

Base class for all request messages.¶

[No fields]¶

10.1.2. Message: MeshRequestUser

Base class for all request messages made by a user.¶

Inherits: MeshRequest
Account: String (Optional): The fully qualified account name (including DNS address) to which the request is directed.¶
Capability: String (Optional): The identifier of the capability under which access is claimed.¶
EnvelopedProfileDevice: Enveloped (Optional): Device profile of the device making the request.¶

10.2. Response Messages

A Mesh Portal Service response consists of a payload object that inherits from the MeshResponse class. When using the HTTP binding, the response SHOULD report the Status response code in the HTTP response message. However the response code returned in the payload object MUST always be considered authoritative.¶

10.2.1. Message: MeshResponse

Base class for all response messages. Contains only the status code and status description fields.¶

[No fields]¶

10.3. Imported Objects

The Mesh Service protocol makes use of JSON objects defined in the JOSE Signatgure and Encryption specifications and in the DARE Data At Rest Encryption extensions to JOSE.¶

10.4. Common Structures

The following common structures are used in the protocol messages:¶

10.4.1. Structure: KeyValue

Describes a Key/Value structure used to make queries for records matching one or more selection criteria.¶

Key: String (Optional): The data retrieval key.¶
Value: String (Optional): The data value to match.¶

10.4.2. Structure: ConstraintsSelect

Specifies constraints to be applied to a search result. These allow a client to limit the number of records returned, the quantity of data returned, the earliest and latest data returned, etc.¶

Store: String (Optional)

The container to be searched.¶

IndexMin: Integer (Optional)

Only return objects with an index value that is equal to or higher than the value specified.¶

IndexMax: Integer (Optional)

Only return objects with an index value that is equal to or lower than the value specified.¶

NotBefore: DateTime (Optional)

Only data published on or after the specified time instant is requested.¶

Before: DateTime (Optional)

Only data published before the specified time instant is requested. This excludes data published at the specified time instant.¶

PageKey: String (Optional)

Specifies a page key returned in a previous search operation in which the number of responses exceeded the specified bounds.¶

When a page key is specified, all the other search parameters except for MaxEntries and MaxBytes are ignored and the service returns the next set of data responding to the earlier query.¶

10.4.3. Structure: ConstraintsData

Specifies constraints on the data to be sent.¶

MaxEntries: Integer (Optional): Maximum number of entries to send.¶
BytesOffset: Integer (Optional): Specifies an offset to be applied to the payload data before it is sent. This allows large payloads to be transferred incrementally.¶
BytesMax: Integer (Optional): Maximum number of payload bytes to send.¶
Header: Boolean (Optional): Return the entry header¶
Payload: Boolean (Optional): Return the entry payload¶
Trailer: Boolean (Optional): Return the entry trailer¶

10.4.4. Structure: PolicyAccount

Describes the account creation policy including constraints on account names, whether there is an open account creation policy, etc.¶

Minimum: Integer (Optional): Specifies the minimum length of an account name.¶
Maximum: Integer (Optional): Specifies the maximum length of an account name.¶
InvalidCharacters: String (Optional): A list of characters that the service does not accept in account names. The list of characters MAY not be exhaustive but SHOULD include any illegal characters in the proposed account name.¶

10.4.5. Structure: StoreStatus

Store: String (Optional)
Index: Integer (Optional)
Digest: Binary (Optional): In a status response, the apex digest value of the store whose status is reported.¶

10.4.6. Structure: StoreUpdate

Inherits: StoreStatus
Envelopes: DareEnvelope [0..Many]: The entries to be uploaded.¶
Partial: Boolean (Optional): If false, the store update does not contain the last index entry in the store.¶
FinalIndex: Integer (Optional): If the value Partial is true, this value MUST specify the index value of the last entry in the store.¶

10.5. Transaction: Hello

Request: HelloRequest
Response: MeshHelloResponse

Report service and version information.¶

The Hello transaction provides a means of determining which protocol versions, message encodings and transport protocols are supported by the service.¶

The PostConstraints field MAY be used to advise senders of a maximum size of payload that MAY be sent in an initial Post request.¶

10.5.1. Message: MeshHelloRequest

CallsignBinding: CallsignBinding (Optional): Contains a proposed callsign binding to the account.¶

10.5.2. Message: MeshHelloResponse

ConstraintsUpdate: ConstraintsData (Optional): Specifies the default data constraints for updates.¶
ConstraintsPost: ConstraintsData (Optional): Specifies the default data constraints for message senders.¶
PolicyAccount: PolicyAccount (Optional): Specifies the account creation policy¶
EnvelopedProfileService: Enveloped (Optional): The enveloped master profile of the service.¶
CallsignBinding: CallsignBinding (Optional): If the request specifies a callsign binding, returns a proposed binding for the requested callsign.¶

10.6. Transaction: BindAccount

Request: BindRequest
Response: BindResponse

Request binding of an account to the service. This method is called during account creation and binding.¶

The operation is called Bind rather than Create because the account is created by the user, not the service.¶

10.6.1. Message: BindRequest

Request binding of an account to a service address.¶

Inherits: MeshRequest
AccountAddress: String (Optional): The service account to bind to.¶
EnvelopedProfileAccount: Enveloped (Optional): The signed assertion describing the account.¶
EnvelopedCallsignBinding: Enveloped [0..Many]: Contains one or more bindings of a callsign to the account.¶

10.6.2. Message: BindResponse

Inherits: MeshResponse

Reports the success or failure of a Create transaction.¶

Reason: String (Optional): Text explaining the status of the creation request.¶
URL: String (Optional): A URL to which the user is directed to complete the account creation request.¶
EnvelopedAccountHostAssignment: Enveloped (Optional): The enveloped assignment describing how the client should discover the host and encrypt data to it.¶

10.7. Transaction: UnbindAccount

Request: UnbindRequest
Response: UnbindResponse

Request deletion of a service account.¶

10.7.1. Message: UnbindRequest

Request creation of a new portal account. The request specifies the requested account identifier and the Mesh profile to be associated with the account.¶

Inherits: MeshRequestUser

[No fields]¶

10.7.2. Message: UnbindResponse

Inherits: MeshResponse

Reports the success or failure of a Delete transaction.¶

[No fields]¶

10.8. Transaction: Connect

Request: ConnectRequest
Response: ConnectResponse

Request information necessary to begin making a connection request.¶

10.8.1. Message: ConnectRequest

Inherits: MeshRequest
EnvelopedRequestConnection: Enveloped (Optional): The connection request generated by the client¶
Rights: String [0..Many]: List of named access rights.¶

10.8.2. Message: ConnectResponse

Inherits: MeshResponse
EnvelopedAcknowledgeConnection: Enveloped (Optional): The connection request generated by the client¶
EnvelopedProfileAccount: Enveloped (Optional): The user profile that provides the root of trust for this Mesh¶

10.9. Transaction: Complete

Request: CompleteRequest
Response: CompleteResponse

10.9.1. Message: CompleteRequest

Inherits: StatusRequest
AccountAddress: String (Optional)
ResponseID: String (Optional)

10.9.2. Message: CompleteResponse

Inherits: MeshResponse
EnvelopedRespondConnection: Enveloped (Optional): The signed assertion describing the result of the connect request¶
EnvelopedAccountHostAssignment: Enveloped (Optional): The enveloped assignment describing how the client should discover the host and encrypt data to it.¶

10.10. Transaction: Status

Request: StatusRequest
Response: StatusResponse

10.10.1. Message: StatusRequest

Inherits: MeshRequestUser
DeviceUDF: String (Optional)
CatalogedDeviceDigest: String (Optional)
Catalogs: String [0..Many]
Spools: String [0..Many]
Services: String [0..Many]
DeviceStatus: Boolean (Optional)

10.10.2. Message: StatusResponse

Inherits: MeshResponse
Bitmask: Binary (Optional)
EnvelopedProfileAccount: Enveloped (Optional): The account profile providing the root of trust for this account.¶
EnvelopedCatalogedDevice: Enveloped (Optional): The catalog device entry¶
CatalogedDeviceDigest: String (Optional)
StoreStatus: StoreStatus [0..Many]
EnvelopedAccountHostAssignment: Enveloped (Optional): The enveloped assignment describing how the client should discover the host and encrypt data to it.¶
Services: ServiceAccessToken [0..Many]: A series of access tokens for the requested services.¶
DeviceStatuses: DeviceStatus [0..Many]

10.10.3. Structure: DeviceStatus

Id: String (Optional)
Status: String (Optional)
Comment: String (Optional)
LastConnected: DateTime (Optional)

10.11. Transaction: Download

Request: DownloadRequest
Response: DownloadResponse

Request objects from the specified container with the specified search criteria.¶

10.11.1. Message: DownloadRequest

Inherits: MeshRequestUser

Request objects from the specified container(s).¶

A client MAY request only objects matching specified search criteria be returned and MAY request that only specific fields or parts of the payload be returned.¶

MaxResults: Integer (Optional): The maximum number of results to be returned.¶
DeviceUDF: String (Optional)
CatalogedDeviceDigest: String (Optional)
Select: ConstraintsSelect [0..Many]: Specifies constraints to be applied to a search result. These allow a client to limit the number of records returned, the quantity of data returned, the earliest and latest data returned, etc.¶
ConstraintsPost: ConstraintsData (Optional): Specifies the data constraints to be applied to the responses.¶

10.11.2. Message: DownloadResponse

Inherits: MeshResponse

Return the set of objects requested.¶

Services SHOULD NOT return a response that is disproportionately large relative to the speed of the network connection without a clear indication from the client that it is relevant. A service MAY limit the number of objects returned. A service MAY limit the scope of each response.¶

Updates: StoreUpdate [0..Many]: The updated data¶
CatalogedDeviceDigest: String (Optional)
EnvelopedCatalogedDevice: Enveloped (Optional): The catalog device entry. This is only returned if the¶

10.12. Transaction: Transact

Request: TransactRequest
Response: TransactResponse

Attempt an atomic transaction on the containers and spools associated with an account.¶

10.12.1. Message: TransactRequest

Inherits: MeshRequestUser

Upload entries to a container. This request is only valid if it is issued by the owner of the account¶

Updates: StoreUpdate [0..Many]: The data to be updated¶
Accounts: String [0..Many]: The account(s) to which the request is directed.¶
Outbound: Enveloped [0..Many]: The messages to be sent to other accounts¶
Inbound: Enveloped [0..Many]: Messages to be appended to the user's inbound spool. this is typically used to post notifications to the user to mark messages as having been read or responded to.¶
Local: Enveloped [0..Many]: Messages to be appended to the user's local spool. This is used to allow connecting devices to collect activation messages before they have connected to the mesh.¶

10.12.2. Message: TransactResponse

Inherits: MeshResponse

Response to an upload request.¶

Bitmask: Binary (Optional)
Entries: EntryResponse [0..Many]: The responses to the entries.¶
ConstraintsData: ConstraintsData (Optional): If the upload request contains redacted entries, specifies constraints that apply to the redacted entries as a group. Thus the total payloads of all the messages must not exceed the specified value.¶

10.12.3. Structure: EntryResponse

IndexRequest: Integer (Optional): The index value of the entry in the request.¶
IndexContainer: Integer (Optional): The index value assigned to the entry in the container.¶
Result: String (Optional): Specifies the result of attempting to add the entry to a catalog or spool. Valid values for a message are 'Accept', 'Reject'. Valid values for an entry are 'Accept', 'Reject' and 'Conflict'.¶
ConstraintsData: ConstraintsData (Optional): If the entry was redacted, specifies constraints that apply to the redacted entries as a group. Thus the total payloads of all the messages must not exceed the specified value.¶

10.13. Transaction: PublicRead

Request: PublicRequest
Response: DownloadResponse

Request objects from the specified container with the specified search criteria.¶

10.13.1. Message: PublicRequest

Inherits: DownloadRequest

Request download from a public store (which may be encrypted).¶

[No fields]¶

10.14. Transaction: Post

Request: PostRequest
Response: PostResponse

Request to post to a spool from an external party. The request and response messages are extensions of the corresponding messages for the Upload transaction. It is expected that additional fields will be added as the need arises.¶

10.14.1. Message: PostRequest

Inherits: MeshRequest
Accounts: String [0..Many]: The account(s) to which the request is directed.¶
Messages: Enveloped [0..Many]: The messages to be sent to the addresses specified in Accounts.¶

10.14.2. Message: PostResponse

Inherits: TransactResponse

[No fields]¶

10.15. Transaction: Claim

Request: ClaimRequest
Response: ClaimResponse

Claim a publication¶

10.15.1. Message: ClaimRequest

Inherits: MeshRequest
EnvelopedMessageClaim: Enveloped (Optional): The claim message¶

10.15.2. Message: ClaimResponse

Inherits: MeshResponse
CatalogedPublication: CatalogedPublication (Optional): The encrypted device profile¶

10.16. Transaction: PollClaim

Request: PollClaimRequest
Response: PollClaimResponse

Check party making claim¶

10.16.1. Message: PollClaimRequest

Inherits: MeshRequest
PublicationId: String (Optional): The envelope identifier formed from the PublicationId.¶
TargetAccountAddress: String (Optional): Account to which the claim is directed¶

10.16.2. Message: PollClaimResponse

Inherits: MeshResponse
EnvelopedMessage: Enveloped (Optional): The claim message¶

10.16.3. Structure: CryptographicOperation

KeyId: String (Optional): The key identifier¶
KeyCoefficient: Binary (Optional): Lagrange coefficient multiplier to be applied to the private key¶