Get OIDC Access Token using curl

Run secured archive services on a single host

Register curl as OIDC client in Keycloak

Sign in to Keycloak Realm Admin Console with User/Password as root/changeit on
https://<docker-host>:8843/admin/dcm4che/console.

Note :

• Replace <docker-host> with the hostname of the docker host.
• If you changed the default realm name dcm4che by environment variable REALM_NAME for Keycloak and Archive Containers, replace dcm4che by that value in the URL.
• https://<docker-host>:8843/admin/dcm4che/console applies only for Keycloak versions 18.0 and higher and if default KC_HTTP_RELATIVE_PATH is used.
• If lower versions of Keycloak are used or if KC_HTTP_RELATIVE_PATH is set to /auth for Keycloak v18.0+, then use https://<docker-host>:8843/auth/admin/dcm4che/console

1. Create an OIDC client with curl as Client ID in General Settings section

   

2. Turn ON the Client Authentication and select Service accounts roles in Authentication flow in the Capability Config section

   

3. Add / as Valid redirect URIs in Login Settings section and Save.

   

4. The saved settings can be viewed as

   

   

5. Add the Role user in the Service account roles tab, use Assign role to assign user role to this client

   

   

6. Store the Secret from the Credentials tab, for later use.

   

Request an access token using OAuth 2.0 Client Credentials Grant

Replace <docker-host> below with the hostname of the docker host.

$ RESULT=`curl -k --data "grant_type=client_credentials&client_id=curl&client_secret=jDF89hTSD4oFx5vlB3uJsc6eTvJuBWL6" https://<docker-host>:8843/realms/dcm4che/protocol/openid-connect/token`
$ echo $RESULT | python -m json.tool
{
    "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJFZE5pZGhoRFIzMnZfZVJTSnhHVjZUbWlUMU85Wjd1bWw3cjFleEJ2Y1kwIn0.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.Sb-XbdGAXyUIZW4rgW1b9l7rLv5t2k_2DYohCJy7GkcuQdI6U20qykATxyDtSFDAiWCqBBeUsOE_LXSowOnMwliPnuNXndvJv8iMbWJYztPNRPPPTB4cqKW50fti7v5vfHrqqH3asbrIIy-irN7DYgAOEsrYGVntiq9f8RIJ1TAL-2QRwzIN5u14WennXfHPjLD92HWShs7-CeR5h4XInQUf0rl-Qm50H-mFHpzb861h0LEq45sq697amc0oJr0tTwBitUnLGeWynX9Wzgx_gDy9mpwrVZSGfZEV6oBL5s4E7ymc477kZOHyQ51-zw_zoEMVJW96MjZQj9MsFgl04A",
    "expires_in": 300,
    "not-before-policy": 0,
    "refresh_expires_in": 0,
    "scope": "profile email",
    "token_type": "Bearer"
}

Note :

• https://<docker-host>:8843/realms/dcm4che/protocol/openid-connect/token applies only for Keycloak v18.0+ and if default KC_HTTP_RELATIVE_PATH is used.
• If lower versions of Keycloak are used or if KC_HTTP_RELATIVE_PATH is set to /auth for Keycloak v18.0+, then https://<docker-host>:8843/auth/realms/dcm4che/protocol/openid-connect/token

Use the token in HTTP requests to the secured Web Application

Replace <docker-host> below with the hostname of the docker host.

$ TOKEN=`echo $RESULT | sed 's/.*access_token":"\([^"]*\).*/\1/'`
$ curl -H "Authorization: Bearer $TOKEN" http://<docker-host>:8080/dcm4chee-arc/aets/DCM4CHEE/rs/studies/count
{"count":0}

Inspect the included JSON Web Token (JWT)

$ JWT=`echo $RESULT | sed 's/[^.]*.\([^.]*\).*/\1/'`
$ echo $JWT | base64 -d | python -m json.tool
base64: invalid input
{
    "acr": "1",
    "azp": "curl",
    "clientAddress": "192.168.2.223",
    "clientHost": "192.168.2.223",
    "clientId": "curl",
    "email_verified": false,
    "exp": 1681480525,
    "iat": 1681480225,
    "iss": "https://<docker-host>:8843/realms/dcm4che",
    "jti": "0cfdd0b5-88f8-4188-b763-b625abe0c6b8",
    "preferred_username": "service-account-curl",
    "realm_access": {
        "roles": [
            "offline_access",
            "default-roles-dcm4che",
            "uma_authorization",
            "user"
        ]
    },
    "scope": "profile email",
    "sub": "24c78e9d-36c3-49a1-bf5d-180e7fe37f32",
    "typ": "Bearer"
}

<docker-host> returned above shall be the hostname of the docker host.