Implicit Grant

Implicit Grant flow. Supported but not recommendted to use

Implicit flow is not recommended to use since there is a risk of leaking access token without any confirmation it was received by the client. More over, some servers prohibit this flow entirely. Aidbox supports Implicit Grant flow but we don't enjoy it very much.

It is better to switch to Authorization Code Grant with PKCE extension instead

Description

Implicit Grant flow is an alternative for Authorization Code flow. This flow just receives access_token in query string fragment instead of obtaining securecode. It's indented for client-side apps use in order to access an API, typically as Web SPA applications. For more detailed information, read OAuth 2.0 specification.

Authorization Endpoint

GET [base]/auth/authorize

Obtaining access token

Query Parameters

NameTypeDescription

state

string

a value used by the client to maintain state between the request and callback

scope

string

scope of the access request

redirect_uri

string

client redirect URI

client_id

string

client ID

response_type

string

value MUST be set to

token

[redirect_uri]#access_token=YzI3ZjQ1M2MtYzFlYi00ZjI3LWI2MzgtOTQ0MWI0ZmIzZjBi&state=eyJoYXNoIjoiIy9pbXBsaWNpdC9iYXNpYyIsImZvcm0tZGF0YSI6eyJ0eXBlIjoiYmFzaWMiLCJiYXNpYyI6eyJjbGllbnQtaWQiOiJpbXAtY2xpZW50In19LCJmb3JtLXBhdGgiOiJpbXBsaWNpdC1wYWdlIn0%3D

After this request, the resource owner (user) will be redirected to Log-in/Sign-up page.

Next step is granting access to the client:

After granting access the user is redirected to the redirect_uri from the client configuration with access_token in query string fragment.

Example

POST /Client
Accept: text/yaml
Content-Type: text/yaml

id: imp-client
resourceType: Client
grant_types:
- implicit
auth:
  implicit:
    redirect_uri: http://localhost:3449/auth.html
curl -X GET \
  'http://localhost:8081/auth/authorize?
        state=example
        &client_id=imp-client
        &redirect_uri=http%3A%2F%2Flocalhost%3A3449%2Fauth.html
        &response_type=token'

Last updated