[19.0] [IMP] webservice: configurable OAuth2 token request - #143
[19.0] [IMP] webservice: configurable OAuth2 token request#143ivantodorovich wants to merge 3 commits into
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Hi @etobella, |
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Until now the OAuth2 "Backend Application (Client Credentials)" flow
always requested the token in one fixed way: an HTTP POST where the
client id and secret were turned into an HTTP Basic Authorization header
(this is what oauthlib does by default). Providers that deviate from
that could not be used.
Two configuration options are added to the webservice backend so those
providers can be supported through configuration only:
- Token Request Method: POST (default) or GET, for providers that expose
the token endpoint as a GET.
- Client Authentication: how the client credentials are presented to the
token endpoint:
* Client ID & Secret (HTTP Basic) (default): the previous behavior,
unchanged.
* Custom Authorization header: a static, verbatim header value (for
example "SSWS <token>"). In this case the Client ID / Client Secret
fields are not used; the header name and value are configured
directly instead.
The defaults keep the exact same behavior as before, so existing
backends are not affected. The custom header is injected through a small
requests auth handler so that oauthlib does not overwrite it with its
automatic Basic Authorization header.
Two validation rules make sure the right fields are filled in depending
on the chosen client authentication: the client id and secret for the
HTTP Basic method, or the header name and value for the custom header
method.
There was a misuse of `and` instead of `or` in the `invisible` attribute of some fields that are specific to the Web Application flow
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The webservice module gained new OAuth2 configuration fields (the token request method, the client authentication method, and the custom Authorization header name and value). These are now also manageable through server environment configuration files, like the other webservice fields.
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This PR has the |
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Hello @etobella 👋🏻 What do you think about this? |
simahawk
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LG overall. Minor remark on form modifiers
| name="oauth2_clientid" | ||
| invisible="auth_type != 'oauth2'" | ||
| required="auth_type == 'oauth2'" | ||
| invisible="auth_type != 'oauth2' or (oauth2_flow == 'backend_application' and oauth2_client_auth_method != 'client_secret_basic')" |
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wouldn't be better to have a flag to compute this condition? Eg: oauth2_clientid_is_visible
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Not sure.
We'd need at least two fields:
oauth2_client_secret_fields_visible (for oauth2_clientid + oauth2_client_secret)
oauth2_client_custom_header_fields_visible (for oauth2_client_auth_header + oauth2_client_auth_value)
Personally, I'm more inclined to keep them inline in the view, and avoid paying the cost of the dedicated computed fields (a backend request roundtrip) -- IMHO it's not complex enough.. but I'm willing to change if you disagree
Some providers require the credentials in a non-standard Authorization header (for instance Okta uses
Authorization: SSWS <token>).This PR makes it possible. Such an endpoint can be configured as:
Additionally, the provider might only reply to
GETinstead ofPOST, so the token request method is configurable now too.