Authentication

OVERVIEW

The Authorization Code Grant Type is used by Websites and Mobile Apps. It differs from most of the other Grant Types by first requiring the App to launch a browser to begin the flow.

In order to Authenticate your User via the Authorization Code, you just have to follow 4 steps :

1. Your Application send your User to the Authentication Page.
2. Your User enter their credentials (and can be prompted to approve the scopes for your app)
3. Your User is redirected back to your Application with an authorization code in the query string
4. Your Application exchanges the authorization code for an access token

 

STEP 1: REDIRECT YOUR USER TO THE ACCOR LOGIN PAGE

 

You have to redirect your User’s browser to the Accor Login page.

Then, once redirected:

• if the user is authenticated, you're done.
• if the user is not yet authenticated, the member is presented with Accor’s authentication page.

Request:

Type	Endpoint
GET	https://login.accor.com/as/authorization.oauth2

Parameters:

Name	Value	Required
response_type	The value of this field should always be code	Yes
client_id	The appId key value generated when you register your application.	Yes
redirect_uri	The URL your users are sent back to after authorization.	Yes
scope	URL-encoded, space-delimited list of member permissions your application is requesting on behalf of the user. Scopes will be provided by Accor Team.	Yes
state	A value used to test for possible CSRF attacks	No
nonce	String value used to associate a Client session with an ID Token, and to mitigate replay attacks. The value is passed through unmodified from the Authentication Request to the ID Token. If present in the ID Token, Clients MUST verify that the nonce Claim Value is equal to the value of the nonce parameter sent in the Authentication Request. If present in the Authentication Request, Authorization Servers MUST include a nonce Claim in the ID Token with the Claim Value being the nonce value sent in the Authentication Request. Authorization Servers SHOULD perform no other processing on nonce values used. The nonce value is a case sensitive string.	No
prompt	Used to display the authentication page (empty) or not (none). Use prompt=none when the user is already authenticated on another website (e.g. all.accor)	No
ui_locales	Language code (2 digits)	No
persistent	Should be yes for activating the “remember me” checkbox	No
request	A single, self-contained parameter; a signed JWT whose claims represent the request parameters of the authorization request	Yes if “required signed requests” has been set on your clientid

Example of Request:

GET https://login.accor.com/as/authorization.oauth2?response_type=code&client_id={your_client_id}&redirect_uri=https://yourdomain/callback&scope={list_of_scopes}

Accor login page:

 

STEP 2: YOUR USER IS REDIRECTED TO YOUR CALLBACK URL

 

After your User is signed in on Accor, he will be redirected automatically to your callback URL with the authorization code and state, that you sent in your request.

Request:

Type	Endpoint
GET	https://yoursite/Callback_URL

Parameters:

Name	Value	Required
code	The OAuth2 authorization code	Yes, if authenticated
state	A value used to test for possible CSRF attacks	No
error	A code indicating the authorization error	No
error_description	A URL-encoded textual description that summarizes the error	No

 

STEP 3: RETRIEVE YOUR ACCESS TOKEN

 

You need to POST a request using the authorization code given during the previous step.

Request :

Type	Endpoint
POST	https://login.accor.com/as/token.oauth2

Header :

Headers	Value	Required
Content-Type	application/x-www-form-urlencoded	Yes
Authorization*	The value of this field should always be: Basic {authorization}	Yes

*authorization = Base64Encode(client_id:client_secretKey) or use standard tools to generate it (login=client_id, password=client_secretKey)

Parameters :

Name	Value	Required
grant_type	The value of this field should always be authorization_code	Yes
code	The OAuth2 authorization code	Yes
redirect_uri	The URI your users are sent back to after authorization.	Yes

 

A successful access token request returns a JSON object containing the following fields :

• access_token – The access token for the application. This value must be kept secure as specified in the API Terms of Use.
• Refresh_token – The refresh_token for the application. This value must be kept secure as specified in the API Terms of Use.
• Id_token – Identification token use with nonce parameter. The Id_token payload contains:
  
  • pi.sri: session identifier. This field is populate only after the authentication, not on the refresh endpoint
  • nonce sent in parameter 
• expires_in – The number of seconds remaining until the token expires. Currently, all access tokens are issued with a 15 minutes lifespan.
• token_type – Value: Bearer

An unsuccessful one returns an HTTP 400 with a JSON error object :

• invalid_client – Client authentication failed.
• invalid_grant – Authorization code has already been used or does not exist.
• unauthorized_client – The customer does not have authorization for the code grant stream or discount tokens.
• unsupported_grant_type – Returned if grant_type is different from authorization_code or refresh_token.

 

Response :

A successful refresh token request returns a JSON object containing the following fields:

• access_token – The access token for the application. This value must be kept secure as specified in the API Terms of Use.
• refresh_token – The refresh_token for the application. This value must be kept secure as specified in the API Terms of Use.
• Id_token – Identification token use with nonce parameter
• expires_in – The number of seconds remaining until the token expires. Currently, all access tokens are issued with a 15 minutes lifespan.
• token_type – Value: Bearer

An unsuccessful one returns an HTTP 400 with a JSON error object:

• invalid_client – Client authentication failed.
• invalid_grant – The refresh token has been revoked
• unauthorized_client – The customer does not have authorization for the code grant stream or discount tokens.
• unsupported_grant_type – Returned if grant_type is different from authorization_code or refresh_token.

 Example of Request:

POST https:// login.accor.com/as/token.oauth2

Content-Type: application/x-www-form-urlencoded

Authorization: Basic authorization

grant_type=refresh_token

refresh_token={refresh_token}

 

After each refresh, you need to check the session status. For security reason, this endpoint can be called once every 5 secondes for a same pi.sri. Otherwise, you will get an NO_VALID_SESSIONS response.

Request:

Type	Endpoint
GET	https://login.accor.com/pf-ws/rest/sessionMgmt/sessions/{pi.sri}

Header :

Headers	Value	Required
Content-Type	application/json	Yes
X-XSRF-HEADER	Against XSRF
Authorization	The value of this field should always be: Basic {authorization}	Yes

Parameters:

Name	Value	Required
pi.sri	The pi.sri of the id_token. Example : K0KMSh-pR1SoXCSbYwtvd8kprYo.ZXUtY2VudHJhbC0x.XI8u	Yes

Response :

A successful request returns a JSON object containing the following fields :

• sri – pi.sri.
• status – session status
  
  • HAS_VALID_SESSIONS : active session
  • SESSION_REVOKED : revoked or disconnected session
  • NO_VALID_SESSIONS : unknown or unvalid session

An unsuccessful one returns an HTTP 400 with a JSON error object:

Example of KO reponse : 

{"resultId":"validation_error","message":"Validation error(s) occurred. Please review the error(s) and address accordingly.","validationErrors":[{"message":"The format of the SRI is invalid.","fieldPath":"sri","errorId":"session_mgmt_sri_invalid"}]}

 

Authentication with scopes approval mode

Authentication in approval mode consist of asking the user to validate each scopes he allows the clientId/partner.

To use this mode, use the prompt parameter: prompt=consent

This mode is not activated yet.