Authorization Contexts

Reference information about authorization contexts

Introduction

See getting started with authorization contexts for a functional overview of authorization contexts and what they can be used for. This page covers the full write contract, validation rules, and the exact effect on the end-user API.

Where authorization contexts can be set

An authorizationContext can be supplied on the service owner create and update endpoints, on the following properties:

All six surfaces share exactly the same authorizationContext shape - an attachment or a navigational action can name an action just like an API or GUI action can, though in practice it will almost always be left unset (see the action field below).

This applies to the dialog create and update endpoints, and to the dedicated create/update-transmission endpoints.

Read-back of the context itself is service-owner-only. authorizationContext is included on the service owner read DTOs (the dialog GET response and the service-owner transmission endpoints), but is not present on any end-user DTO. This is a deliberate confidentiality property: an authorization context can name specific parties, and publishing that list to an end user would reveal which other parties may have access to a given part of the dialog. End users only ever see the effects of a context: isAuthorized, the masked fields or the exclusion described below, and the entity’s entry in the dialog token’s e claim.

GraphQL follows the same pattern: it exposes isAuthorized and the excluded* collections on the end-user entities, but not the authorization context itself.

Fields

serviceResource

Type string, optional.

Overrides the dialog’s own service resource for this one check, pointing the evaluation at a different resource’s policy. When set, the context is evaluated as a request against that resource alone - the dialog’s own instance reference is not carried over, matching the same semantics as the legacy authorization attribute’s resource override.

Must start with urn:altinn:resource: and otherwise follow the standard Altinn resource identifier format. Maximum length 255 characters.

The authenticated service owner must own the referenced resource. Referencing a resource the caller does not own fails the entire create or update with 403 Forbidden.

additionalResourceAttribute

Type string, optional.

A subresource or task matched within the effective resource’s policy - for example urn:altinn:task:Task_1 or urn:altinn:subresource:mycustomresource. Unlike a legacy authorization attribute, this never overrides the resource on its own; it’s layered on top of whatever resource is in effect (the dialog’s own, or the one set by serviceResource).

A bare name with no recognised namespace prefix is treated as urn:altinn:subresource:<name>.

Must not start with urn:altinn:resource: - use serviceResource for that. It also cannot reference an app (the urn:altinn:app: namespace, or a value expanding into an app_{org}_{appId} identifier) or an organization (urn:altinn:org:): the app is already carried by the resource registry entry that serviceResource names, and the owning organization is derived from the effective resource. Same format and length rules as serviceResource.

parties

Type array of string, optional.

The parties the check is evaluated on behalf of, in addition to (or instead of) the dialog’s own party - see includeDialogParty below. Access is granted if the PDP permits any one of the listed parties (OR semantics), not all of them.

• Maximum 3 entries. With includeDialogParty: true, the effective maximum number of parties evaluated per entity is 4.
• Entries must be unique.
• Must contain at least one entry unless includeDialogParty is true.
• Each entry must be a valid party identifier: urn:altinn:organization:identifier-no:{orgnr}, urn:altinn:person:identifier-no:{fnr/dnr}, urn:altinn:party-identifier:username:{username}, or an ID-porten e-mail identifier.

An authorization check with no parties to evaluate can never be authorized - it fails closed rather than granting access implicitly.

includeDialogParty

Type boolean, default false.

When true, adds the dialog’s own party to the set of parties being evaluated, in addition to any parties listed in parties.

includeDialogParty: true combined with additionalResourceAttribute is the direct replacement for a legacy subresource authorization attribute - the same party, narrowed to a subresource. includeDialogParty: false combined with an explicit parties list is the new capability: granting access to a part of the dialog for a party other than the dialog’s own.

action

Type string, optional, on every surface - there is no surface where it is required or unavailable.

The XACML action to evaluate. If omitted, defaults to read.

Unlike the legacy authorization attribute, action is never derived from serviceResource or additionalResourceAttribute - narrowing the resource side of the check does not narrow the action side. A context that sets additionalResourceAttribute and leaves action unset still evaluates a plain read on the narrowed resource, and if a broader read rule already exists on the main resource, that rule can still match it - XACML target matching only checks that the attributes a rule requires are present, not that no other attributes are, so the extra resource attribute does not by itself exclude the broader rule. To get real narrowing, name a distinct action - for example elementread - and write (or reuse) a policy rule keyed on that action together with the narrowed resource.

Maximum length 255 characters.

On the end-user read surface, the entity’s action property always reports the action that was actually evaluated: the context’s action when it names one, and read when it does not. On the service owner read surface the two are kept apart - the legacy top-level action reads back as an empty string for an entity that uses a context, and the evaluated action is found in authorizationContext.action.

tokenRef

Type string, optional. Maximum length 50 characters; must not be blank when set.

A reference of your own choosing that identifies this context in the dialog token. When the end user is authorized for the context, the token’s e claim lists this value instead of the id of the entity carrying the context, so a receiving service can recognize the grant without tracking Dialogporten entity ids. Several contexts may share the same tokenRef; that is allowed, and the token then lists it once - useful for letting the receiving service check one reference for a whole group of entities. Dialogporten does not check tokenRef for uniqueness or for collisions with entity ids, since both the contexts and the receiving check are yours; take care not to reuse a reference for entities that should be authorized separately.

tokenRef is read back on the service owner surface along with the rest of the context, and is never exposed to end users other than through the token.

unauthorizedPresentation

Type string enum, values Disabled or Excluded. Required.

Although not marked as a required property in the OpenAPI schema, omitting this field is rejected at validation time - there is no default. It must be set explicitly to one of the two values below.

• Disabled keeps the entity in the collection it belongs to, but masks its URLs and embedded content references. This is the behaviour equivalent to the legacy authorization attribute mechanism, and is the recommended default when migrating an existing dialog with no intent to change what end users see.
• Excluded removes the entity from that collection entirely, leaving nothing but its id and createdAt in a sibling excluded* array. See the next two sections for the exact effect.

What an unauthorized end user sees

Disabled: kept in place, URLs masked

The entity stays where it is in its array, isAuthorized is false, and the entity is not listed in the dialog token’s e claim. Everything the entity says about itself remains readable; only the parts that would let the end user act on it are replaced.

URLs are replaced with one of two placeholder values: urn:dialogporten:unauthorized for an access denial, and urn:dialogporten:expired for an expired attachment or navigational action URL - but the expired placeholder is only used when the caller is authorized; a URL that is both unauthorized and expired shows the unauthorized placeholder.

Excluded: removed from its collection

The entity is not in the response at all. There is no element with isAuthorized: false to find, and no entry in the dialog token’s e claim. All that is left is a stub in a sibling array, carrying two fields and nothing else:

{
  "id": "0194a1b2-3c4d-7e5f-8a9b-0c1d2e3f4a5b",
  "createdAt": "2026-01-15T09:12:44.512Z"
}

createdAt is what lets an end-user system place the gap: it can show that something it cannot see sits between two transmissions it can, rather than presenting a list that is silently short.

Each collection that can carry an authorization context has its own shadow array, named after it and sitting directly beside it:

All six are nullable and omitted from the JSON entirely when nothing was excluded, which is the normal case - treat an absent array exactly like an empty one. GraphQL exposes the same six fields, typed [ExcludedElement!].

{
  "transmissions": [
    {
      "id": "...",
      "attachments": [ /* ... */ ],
      "navigationalActions": [ /* ... */ ],
      "excludedAttachments": [ { "id": "...", "createdAt": "..." } ],
      "excludedNavigationalActions": [ { "id": "...", "createdAt": "..." } ]
    }
  ],
  "guiActions": [ /* ... */ ],
  "apiActions": [ /* ... */ ],
  "attachments": [ /* ... */ ],
  "excludedTransmissions": [ { "id": "...", "createdAt": "..." } ],
  "excludedGuiActions": [ /* ... */ ],
  "excludedApiActions": [ /* ... */ ],
  "excludedAttachments": [ /* ... */ ]
}

Four consequences worth keeping in mind:

1. isAuthorized: false means exactly one thing. It marks an entity that exists, is described, and cannot be used - never an entity that has been withheld. An excluded entity is simply absent.
2. An excluded transmission takes its children with it. Only the transmission’s own stub appears; its attachments and navigational actions are not reported separately, in that transmission’s shadow arrays or anywhere else. A child with its own Excluded context inside a transmission that is only Disabled (and denied), however, is excluded individually, into that transmission’s own shadow array.
3. Dialog-level content (content.mainContentReference) is not governed by an authorization context at all - dialog content has no context of its own. Its visibility is gated purely on whether the caller has read access to the dialog’s main resource.

Endpoint behaviour for excluded transmissions

Parent-first narrowing

A child authorization context can only narrow access, never widen it. Access to the parent is always a precondition:

• For a transmission’s attachments and navigational actions, the transmission’s own authorization is the precondition - a permissive child context inside a denied transmission grants nothing, and the child is not listed in the dialog token’s e claim regardless of what the child context alone would otherwise permit.
• For dialog-level attachments, the precondition is read access to the dialog’s main resource. A dialog attachment with no context of its own is never individually restricted - it inherits the dialog’s own access.

If the caller cannot read the dialog’s main resource at all, GET /dialogs/{id} fails with 403 Forbidden before any per-entity evaluation runs, unless list authorization grants a narrower form of access - in which case the dialog is returned with its actions flagged as unauthorized rather than the request being rejected outright. The standalone transmission endpoints have no such fallback: without main-resource access they answer 404 Not Found, as if the dialog did not exist.

Multi-party evaluation

• Access to a check is granted if any of its permitted parties is granted - OR semantics across parties, same as within parties itself.
• Each check is evaluated once per party it’s associated with. Identical resource/action pairs across parties are consolidated into a single evaluation, but the party cap (3, or 4 with includeDialogParty) is still a real cost control: every distinct combination of resource, action and party is one evaluation against Altinn Authorization, and a dialog with many authorization contexts multiplies this quickly.
• If the correlation between requested checks and returned decisions doesn’t line up as expected for any reason, every check for the affected request is denied - the system fails closed rather than guessing.
• A self-identified (system) user’s own party is evaluated using its system user identity; parties named directly in a context’s parties list are evaluated as themselves and will simply be denied if the PDP does not recognise them as delegatable to the caller - a system user cannot represent an arbitrary party by naming it in a context.

Mutual exclusivity with authorizationAttribute

An entity cannot combine authorizationContext with the legacy authorizationAttribute field:

• On API actions and GUI actions, authorizationAttribute must be absent when authorizationContext is present, and the top-level action field must be absent or empty too - use authorizationContext.action instead. Conversely, action is required when there is no context. On the service owner read surface such an entity reads back with action as an empty string, so a GET response can be sent straight back to PUT unchanged.
• On transmissions, authorizationAttribute must be absent when authorizationContext is present. There is no top-level action on transmissions.
• Attachments and transmission navigational actions never had authorizationAttribute - only authorizationContext.

The same rules apply on the update endpoints and on the dedicated create/update-transmission endpoints.

Migration from authorizationAttribute

The action: "elementread" on the first, second and fourth rows is a deliberate choice, not a fixed name - see the next point.

Five things to be aware of when migrating:

1. Legacy authorization attributes no longer derive a distinct action for subresource/task narrowing. They used to derive transmissionread in that case, specifically so the request would not accidentally match a broader read rule on the main resource; that derivation is gone, and every legacy attribute now derives a plain read, whatever it refers to. A subresource or task named in a legacy attribute can therefore only ever broaden access through a dedicated policy rule, never narrow it - see using authorization attributes on transmissions. If you relied on transmissionread to narrow a transmission’s visibility, and want to keep doing so after migrating, name an explicit, distinct action on the authorization context (elementread in the table above is just an example name) and update your policy to match on that action instead of transmissionread - authorizationContext.action is the only place a narrowing action can still be named.
2. A related behaviour change applies to legacy entities regardless of whether you migrate them. Authorization on a legacy action with no authorizationAttribute now requires that action to be permitted on the exact resource the entity refers to. Previously, it could also be satisfied by any other entity in the same dialog having that action permitted on some resource, including the dialog’s main resource - which meant, for example, a write GUI action with no authorization attribute could be granted purely because some unrelated entity in the dialog also had a permitted write. It now needs write on the main resource specifically. This is a defect fix rather than a live migration risk today, but any future policy shaped the old way would be affected - if your service uses several distinct actions across entities sharing the same dialog, it’s worth double-checking your policies.
3. unauthorizedPresentation has no legacy equivalent and must be chosen explicitly. Legacy behaviour (mask URLs, keep content) corresponds to Disabled. Migrating with Excluded instead is a visible change for end users, and one their systems have to be ready for: the entity disappears from the collection it used to sit in.
4. The grant moves from the a claim to the e claim. The moment an entity gains an authorization context, its grant disappears from the dialog token’s list of authorized actions (a), and the entity is instead listed in the token’s e claim by id or tokenRef - a receiving service that authorizes purely from a will start denying requests for that entity. Coordinate the receiving side to check e (see the dialog token reference) before migrating.
5. A wire-level difference in the resource attribute is easy to miss. For authorizationAttribute, Dialogporten has always sent a subresource attribute on the underlying authorization request - a sentinel value, main, when no attribute was supplied at all. An authorization context that neither sets serviceResource nor additionalResourceAttribute (pure party-only narrowing) sends no subresource attribute at all. A policy rule that matches specifically on the subresource attribute being main will stop matching once you migrate to a plain party-narrowed context. Policies that don’t reference the attribute are unaffected.

Validation errors

Contract reference

The stub used in the six excluded* collections on the end-user API:

Read more

• Learn how authorization contexts give fine-grained, multi-party access control on individual parts of a dialog
• Reference information about dialog tokens
• Reference information about authorization attributes