In the Gateway project, external systems are authenticated using “JWT client authentication“ and authorized using “OAuth 2.0 Token Exchange“.

Prerequisites

Authorization is done by exchanging a SAML Assertion from Kombit STS with the Authorization Server on the Gateway environment.

In order to obtain SAML Assertions, please refer to the following resources:

The integration requires an active service agreement in the Administration Module at 'Serviceplatformen', between the vendors service consumer system (anvendersystem), and the data owning organization regarding the Care Gateway service with entity id http://ehealth.sundhed.dk/service/CareGateway/1 .

The service agreement must include the Care Delivery Reporter system role and specify the STS organization id of the the data owning organization.

JWT Client Authentication

Prerequisites:

The system is in possession of a Public/Private key pair.
- This is the same as the service consumer system’s certificate in 'Serviceplatformen'
- The public key must be registered in Keycloak as well
The system has a client in Keycloak.
The systems Public Key is registered for the client.

In order to obtain access tokens from Keycloak, the system must provide a signed JWT (i.e. JWS) on each access token request to Keycloak.

The system issues the JWS itself and signs it with its own private key.

See also jwt.io for a comprehensive list of software libraries for token signing.

The JWS must have the following fields in the header:

alg: Signature Algorithm
kid: Key ID

{
  "alg": "RS256",
  "kid": "rqjgLIDzVg8CYwfTYph00J4YLr6cXQVO7WXKtw7sY6w"
}

NOTE: The Key ID is the base64url encoded, SHA-256 digest (HASH),of the encoded public key. See also "Obtaining the kid from a Public key"

The JWS must have the following fields in the body:

jti: JWT ID - Unique identifier for this token.
iss: Issuer - Who created the token. (In this case it is the client)
sub: Subject - Whom the token refers to. (In this case it is also the client)
aud: Audience - What the token is intended for. (In this case it is the keycloak realm info url)
iat: Issued at - When the token was created. (seconds since UNIX epoch)
exp: Expiration time - When the token expires (seconds since UNIX epoch)
nbf: Not valid before - When the token validity starts (seconds since UNIX epoch)

{
  "jti": "93461fd9-a043-45e7-89c2-06757348377e",
  "iss": "eoj",
  "sub": "eoj",
  "aud": "https://saml.test001.ehealth.sundhed.dk/auth/realms/ehealth",
  "iat": 1638873738,
  "exp": 1638873748,
  "nbf": 1638873738
}

NOTE: The JWS is single use only.

Example:

eyJhbGciOiJSUzI1NiIsImtpZCIgOiAicnFqZ0xJRHpWZzhDWXdmVFlwaDAwSj
RZTHI2Y1hRVk83V1hLdHc3c1k2dyJ9.eyJleHAiOjE2Mzg4Nzk5MDcsIm5iZiI
6MTYzODg3OTg5NywiaWF0IjoxNjM4ODc5ODk3LCJqdGkiOiJiMTBjNWFmYi03M
GZkLTQ2NGYtODc3Yy1kYWJiNzMzYTQwMjgiLCJpc3MiOiJlb2oiLCJhdWQiOiJ
odHRwczovL3NhbWwudGVzdDAwMS5laGVhbHRoLnN1bmRoZWQuZGsvYXV0aC9yZ
WFsbXMvZWhlYWx0aCIsInN1YiI6ImVvaiJ9.SNwkVzMn1JhPPbAfT-4qym8OFS
3pebm3OWqfHc4YwNYAGSV6ih0mqKJtq6kmzATDWeyGEJRrhlM-6I5CV8bH77uZ
UyPPBdamUpdtSOTvQGUDxxiIJFwzqVHF77TICjqc5_8n-g2drn27J9D7cwYRXy
wFBDVPlqqZaWCoHipOoF0FSqMmOWvWHG152-jmeMX2GQxjRnfRd3xV0rcGZc2p
mTzYvv4b9KHOSoVmnuXmh3MSMhQo9D8WtUCxakCIyKGEDtmQ4zi-5NSpJdcejf
gii-g-XPhA8i4bZ7xc56_XhYQWs15JfyqV-wAnsnU-HQhQuiSO1rHLWYjk5B2q
2d0W8g

Obtaining the `kid` from a Public key

Obtaining the kid from a Public key is done in 3 steps. This is demonstrated with the following example, given a Public key:

Step 1. Getting the encoded bytes.

The encoded bytes are obtained by removing the tags -----BEGIN PUBLIC KEY----- and -----END PUBLIC KEY-----, and all line separators. Then Base64 decode the resulting line as bytes. The hex representation of this applied to above Public key is:

30820122300d06092a864886f70d01010105000382010f003082010a02820101009
0c00341ebf70b23c0d76a8e5b4cf623d2edaaa097face9fa488e67dab480eabf61e
7d288576584676e3a368028ccdc3b4c67ed3be9299db7f0d57f4af3cd3ac43bcdf9
87256d1fbc990502fc34cc999b4533cd8a1c8c5dd8fdd73ecce7328f04cad2b62de
116d2ef49fdc89865e1fa6fe4130ea1141b56b4b0a5660afee870dc002e88859235
c84de22b742b764ed041ef530ed1346806556eef04626e0f2161ec333bcebeb5b40
982e4226bb98cf844c4d3205990dadacfdab4887ab2c9266ad5d031a1c762aeea32
86aec12b47eea14fa01815070428e403bb2accc98d7e859aee42ce77be43d1607f3
c072b84c530a40e240eb24bee3fe71bc7ee921ec6b0203010001

NOTE: line breaks are added for readability.

Step 2. Getting the SHA256 digest.

Apply the SHA256 algorithm to the bytes obtained in step 1 (not the hex string). In this example, the hex representation of the resulting bytes is:

aea8e02c80f3560f026307d3629874d09e182ebe9c5d054eed65cab70eec63ac

Step 3. Encoding the digest.

The last step is to apply base64url encoding to the bytes obtained in step 2. The final result is then:

rqjgLIDzVg8CYwfTYph00J4YLr6cXQVO7WXKtw7sY6w

Requesting Access token with Token Exchange

The token exchange request is an HTTP POST request with content-type application/x-www-form-urlencoded

Body Parameters:

client_id: The id of the requesting client.
client_assertion_type: Always urn:ietf:params:oauth:client-assertion-type:jwt-bearer.
client_assertion: The JWS described in the previous section.
grant_type: Always urn:ietf:params:oauth:grant-type:token-exchange.
subject_issuer: The ID of the subject token issuer e.g. kombit-sts.
subject_token_type: Always urn:ietf:params:oauth:token-type:saml2.
subject_token: The Base64url encoded SAML Assertion issued by subject_issuer

The response is a standard OAuth 2.0 access token response with content-type application/json

Response Fields:

access_token: The access token used for authentication on the FUT platform.
expires_in: The time to live of the access token in seconds
refresh_token: The refresh token used for requesting new access tokens
refresh_expires_in:The time to live of the refresh token in seconds

Example

Request:

POST: https://saml.test001.ehealth.sundhed.dk/auth/realms/ehealth/protocol/openid-connect/token
Headers: 
    Accept=application/x-www-form-urlencoded
    Content-Type=application/x-www-form-urlencoded
Body: 
    client_id=eoj
    client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer
    client_assertion=eyJhbGciOiJSUzI1NiIsImtpZCIgOiAicnFqZ0xJRHpWZzhDWXdmVFlwaDAwSjRZTHI2Y1hRVk83V1hLdHc3c1k2dyJ9.eyJleHAiOjE2Mzg4ODI2NzMsIm5iZiI6MTYzODg4MjY2MywiaWF0IjoxNjM4ODgyNjYzLCJqdGkiOiI0MDk0YzNhYy03Mzc4LTQzZWQtODM3Ny05NjAzYjFmZjc2MGEiLCJpc3MiOiJlb2oiLCJhdWQiOiJodHRwczovL3NhbWwudGVzdDAwMS5laGVhbHRoLnN1bmRoZWQuZGsvYXV0aC9yZWFsbXMvZWhlYWx0aCIsInN1YiI6ImVvaiJ9.eQ3kUUmlXGsBphFdH0LqhRAQzgMwkIdVxctM1Fw8J4H6OIq1ZVcEFmY67y-f8RMCHC_sSwZ2EWb1PKKoPHCVXwYAvJ4hWw0yXitN7i-GFW-s9iU9Wgem0I4g_JLaVoYqoGf_WaZXREbaN8MkzCYYz2ODrk15xR6J2hQlgiPMezSOtP0BDJCAly5x6gEFPI6gR1HMeNBjCmGzxh2nFtvkYiGrNjVR4rhcww6F9XqBCZhbIP9l691jAW77oRhTcd0fHdJ50gwOQebwCErV2_hdTSmImJLZIlUSQBNub9RDFoSVjnweZXqCnIrx53THlSGKyIETkG17ww6SamETekB4Mg
    grant_type=urn:ietf:params:oauth:grant-type:token-exchange
    subject_issuer=kobmit-sts
    subject_token_type=urn:ietf:params:oauth:token-type:saml2
    subject_token=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

Response:

{
  "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJwNi16RFFwSXVyVGxJWGVWeUZwTlZ1cVpud1B2WUdiVzhxOHB1TkhLQ21jIn0.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-PGJwcDpQcml2aWxlZ2VMaXN0IHhtbG5zOmJwcD1cImh0dHA6Ly9pdHN0LmRrL29pb3NhbWwvYmFzaWNfcHJpdmlsZWdlX3Byb2ZpbGVcIiB4bWxuczp4c2k9XCJodHRwOi8vd3d3LnczLm9yZy8yMDAxL1hNTFNjaGVtYS1pbnN0YW5jZVwiPjxQcml2aWxlZ2VHcm91cCBTY29wZT1cInVybjpkazpnb3Y6c2FtbDpjdnJOdW1iZXJJZGVudGlmaWVyOjI5MTg5ODQ2XCI-PFByaXZpbGVnZT5odHRwOi8vc2VydmljZXBsYXRmb3JtZW4ucHJvZC1zZXJ2aWNlcGxhdGZvcm1lbi5kay9yb2xlcy9zZXJ2aWNlc3lzdGVtcm9sZS9kdW1teS8xPC9Qcml2aWxlZ2U-PC9Qcml2aWxlZ2VHcm91cD48L2JwcDpQcml2aWxlZ2VMaXN0PiIsInByZWZlcnJlZF91c2VybmFtZSI6InNlcmlhbG51bWJlcj1jdnI6MTk0MzUwNzUtZmlkOjM3NjcxNTMzICsgY249a29tYml0LXNwLXQtZGVtby1zZXJ2IChmdW5rdGlvbnNjZXJ0aWZpa2F0KSwgbz1rb21iaXQgYS9zIC8vIGN2cjoxOTQzNTA3NSwgYz1kayIsImN2ciI6IjI5MTg5ODQ2In0.Tov5xlwX9bS-bPPJ73g0P5Lq89H5xFx5_HD2K20b3B_Ij4EzSBSJuM6M1CXFJzmG_zxAS2qylT3K8Oq7RUnqJHUw1wJsjq6HQWdoCrLOQgVI-LVMM6ZSHXZF1kZwUalGZBOJMMeoII4bnE1ZQ7wMdzPuoGWiu9v523jlAJvxeM59K-UvNATlOUr4F1bCEMabo45XYXVLxXQ4Tkg8utEuEmUZwl5J2eJnbMBoc6iAa99m5CuSLlM0GT7_QSyq8CN8yCn9LWG4cxrdqgqL5Wf3kwVE1pS_sUqinR6rHPt5Y6mnAYFER2Gk5em4pBrochxZLApRRjsPGf-asLpoM5DA5A",
  "expires_in": 300,
  "refresh_expires_in": 1800,
  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICIyMGRlOTdiOC1jMGU3LTQ4MTktYWVhZi1iYjgxMmI2ZjI4NjIifQ.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.rysjXEeHUgxjrOI5bYyPB9A8l3N5yD_UoxzkQsPqGFc",
  "token_type": "Bearer",
  "not-before-policy": 0,
  "session_state": "9e0567e0-95eb-4b19-9641-0f618f1a6eb6",
  "scope": "profile email"
}

Requesting Access token with Refresh Token

Using a refresh token is like the initial token exchange request an HTTP POST request with content-type application/x-www-form-urlencoded