`set_user_token`: Incompatibility between the Authorization header and having a param clashing with the auth header names.

[nicoraynaud]

Hi,

There seems to be a bug in how we read the authentication attributes in concerns/set_user_by_token.rb.

On line 52 and after this is how it reads:

uid              = request.headers[uid_name] || params[uid_name] || parsed_auth_cookie[uid_name] || decoded_authorization_token[uid_name]
other_uid        = other_uid_name && request.headers[other_uid_name] || params[other_uid_name] || parsed_auth_cookie[other_uid_name]
@token           = DeviseTokenAuth::TokenFactory.new unless @token
@token.token     ||= request.headers[access_token_name] || params[access_token_name] || parsed_auth_cookie[access_token_name] || decoded_authorization_token[access_token_name]
@token.client ||= request.headers[client_name] || params[client_name] || parsed_auth_cookie[client_name] || decoded_authorization_token[client_name]

The problem exists where: if someone uses the decoded_authorization_token values coming from the one Authorization header instead of relying on the other 4 headers, the order of reading values is interrupted by reading from the params.

As a result, if either a path, query or body param contains an attribute with a name clashing with the defined client_name, uid_name or access_token_name, this will get evaluated before we can even try to evaluate the decoded_authorization_token (and this would be the same with the cookie).

As a result, auth fails for these requests.

GET /api/protected/some_resource?client=123
Authorization: Bearer a3dxd.....
===> Fails because client = 123 instead of the value in the Bearer token.

Could we issue a fix where we read from params after any other option has been tried ?

uid              = request.headers[uid_name] || parsed_auth_cookie[uid_name] || decoded_authorization_token[uid_name] || params[uid_name]
other_uid        = other_uid_name && request.headers[other_uid_name] || parsed_auth_cookie[other_uid_name] || params[other_uid_name]
@token           = DeviseTokenAuth::TokenFactory.new unless @token
@token.token     ||= request.headers[access_token_name] || parsed_auth_cookie[access_token_name] || decoded_authorization_token[access_token_name] || params[access_token_name]
@token.client ||= request.headers[client_name] || parsed_auth_cookie[client_name] || decoded_authorization_token[client_name] || params[client_name]