The OpenID Connect Provider from BankID provides by default Access Tokens.

Structure

The default access token structure builds on Keycloak and consists of the following three parts:

• A General part telling that the supported token type corresponds to standard Bearer Token usage
• An ID part that contains key claims from the corresponding ID Token
• An Access part that contains details on resource access, including in particular the audience (aud) for the access token.

The supported default token type is self-contained since it contains enough information to determine the authorization context, in particular the following:

• The issuer (iss)of the access token. See corresponding claim in ID Token.
• The authorized party (azp) for the access token. See corresponding claim in ID Token.
• The subject identifier (sub) of the access token, ie. a reference to the end-user (resource owner) that authorized the access token. See corresponding claim in ID Token.
• Intended audience (aud)for the access token, ie. a reference to resource servers that the access token regulates access to. Note that this is not related to the corresponding claim in the ID Token. The audience for the ID Token (being the OIDC Client) is different from the audience for an Access Token.
  
• The specific set of resources that the access token grants access to, corresponding to the set of scopes included in the authorize request that subsequently resulted in the issuance of the Access Token.

Note finally that the OIDC Provider form BankID supports signed Access Tokens in JWT format. The below table shows claims in the payload part of the JWT. Claims contained in the JWT header are not shown. See session handling for the life-time of an access token. To cater for access tokens that are either revoked before their expiry, or that have expired prematurely for other reasons, validation of access tokens via introspect is supported. Another use of introspection is for eligible resource servers to retrieve confidential claims that are not carried in the access token itself. One such examle is the bankid_altsub claim.

Scopes and claims

The claims in the Access token is outlined in the table below. The origin column indicates non-standard claims. Such claims are either added by Keycloak or the result of customization made by the BankID OIDC Provider.

api_ver

1

{"tinfo:
  {"roles 
    ["address","phone_number", "email", "nnin"]
}}

Examples

Access token for electronic signing

The following is an example of a valid access token to the SignDoc resource server. The resource designator signdoc as well as the role read_write is added to the resource_access claim of the access token to signify access to the associated endpoint of the SignDoc resource server API. 

{
    "exp": 1629281602,
    "iat": 1629281302,
    "jti": "7cc03090-7c8b-4775-9532-51169932adc7",
    "iss": "https://auth.current.bankid.no/auth/realms/current",
    "aud": "signdoc",
    "sub": "b9ce6414-2ddc-46e2-8330-7f3d59000c64",
    "typ": "Bearer",
    "azp": "oidc-testclient",
    "acr": "1",
    "realm_access": {
      "roles": []
    },
    "resource_access": {
      "signdoc": {
        "roles": [
          "read_write"
        ]
      }
    },
    "scope": "signdoc/read_write",
    "clientHost": "xxx.xxx.xxx.xx",
    "clientId": "oidc-testclient",
    "resource_claims": {},
    "clientAddress": "xxx.xxx.xxx.xx"
}

Access token for access to userinfo

Below is example of a valid Access Token for access to the TINFO resource server, used in context of the userinfo API. The resource designator tinfo is added to the resource_access claim of the access token to signify access to various parts of the TINFO dataset. Since Userinfo (TINFO Userinfo Endpoints) supports standardized claims, the same set of claims is also included under realm_access.

{
    "sub": "2cd7cecd-d444-4685-bb04-8bbfdb45a069",
    "resource_access": {
        "tinfo": {
            "roles": [
                "address",
                "phone",
                "profile",
                "email"
            ]
        }
    },
    "birthdate": "2018-05-09",
    "amr": "BID",
    "iss": "https://auth.current.bankid.no/auth/realms/current",
    "typ": "Bearer",
    "bankid_altsub": "9578-6000-4-634582",
    "originator": "CN=BankID - TestBank1 - Bank CA 3,OU=123456789,O=TestBank1 AS,C=NO;OrginatorId=9980;OriginatorName=BINAS;OriginatorId=9980",
    "given_name": "Test User",
    "nonce": "a6c03ff5-936c-4bff-ab98-a9898d37984f",
    "aud": "tinfo",
    "acr": "urn:bankid:bid;LOA=4",
    "realm_access": {
        "roles": [
            "address",
            "phone",
            "profile",
            "email"
        ]
    },
    "azp": "oidc-testclient",
    "auth_time": 1629280890,
    "scope": "openid phone address profile email",
    "resource_claims": {},
    "name": "Test User BankID",
    "exp": 1629281190,
    "session_state": "66801cef-7746-4dd6-a018-43bda5c7002b",
    "iat": 1629280890,
    "family_name": "BankID",
    "jti": "2fc59b32-e1ed-47cb-abf7-87786504912a"
}

Other notes