Files
akkounts/app/controllers/webfinger_controller.rb
T
raucao 8fc7ffdd1d
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Add PKCE support to remoteStorage OAuth
Implements the optional OAuth 2.0 Authorization Code grant with PKCE
(RFC 7636) for remoteStorage, as described in the remoteStorage spec
(section 10.1).

- Advertise the authorization and token endpoints plus the supported
  code_challenge method (S256) in WebFinger, and bump the advertised
  spec version to draft-dejong-remotestorage-27
- Add RsAuthorizationCode: a short-lived (5 min), single-use authorization
  code stored only as a SHA256 digest
- Add RsOauthManager services for issuing and exchanging codes, including
  S256 verification
- Add a cross-origin POST /rs/oauth/token endpoint that exchanges a code
  (and code_verifier) for an access token, with CORS and no CSRF token
- Consent dialog now carries response_type / code_challenge through the
  form and redirects with the code in the query string for the code flow
- Remove the existing-token reuse shortcut so every authorization results
  in a distinct authorization (and token)

Part of #254
2026-11-02 16:40:25 +04:00

130 lines
3.5 KiB
Ruby

class WebfingerController < WellKnownController
before_action :allow_cross_origin_requests, only: [:show]
def show
resource = params[:resource]
if resource && @useraddress = resource.match(/acct:(.+)/)&.[](1)
@username, @domain = @useraddress.split("@")
unless Rails.env.development?
# Allow different domains (e.g. localhost:3000) in development only
head 404 and return unless @domain == Setting.primary_domain
end
unless @user = User.where(ou: Setting.primary_domain)
.find_by(cn: @username.downcase)
head 404 and return
end
render json: webfinger.to_json,
content_type: "application/jrd+json"
else
head 422 and return
end
end
private
def webfinger
jrd = {
subject: "acct:#{@user.address}",
aliases: [],
links: []
}
if @user.avatar.attached?
jrd[:links] += avatar_link
end
if Setting.mastodon_enabled && @user.service_enabled?(:mastodon)
# https://docs.joinmastodon.org/spec/webfinger/
jrd[:aliases] += mastodon_aliases
jrd[:links] += mastodon_links
end
if Setting.remotestorage_enabled && @user.service_enabled?(:remotestorage)
# https://datatracker.ietf.org/doc/draft-dejong-remotestorage/
jrd[:links] << remotestorage_link
end
jrd
end
def avatar_link
[
{
rel: "http://webfinger.net/rel/avatar",
type: @user.avatar.content_type,
href: helpers.image_url_for(@user.avatar)
}
]
end
def mastodon_aliases
[
"#{Setting.mastodon_public_url}/@#{@user.cn}",
"#{Setting.mastodon_public_url}/users/#{@user.cn}"
]
end
def mastodon_links
[
{
rel: "http://webfinger.net/rel/profile-page",
type: "text/html",
href: "#{Setting.mastodon_public_url}/@#{@user.cn}"
},
{
rel: "self",
type: "application/activity+json",
href: "#{Setting.mastodon_public_url}/users/#{@user.cn}"
},
{
rel: "http://ostatus.org/schema/1.0/subscribe",
template: "#{Setting.mastodon_public_url}/authorize_interaction?uri={uri}"
}
]
end
def remotestorage_link
auth_url =
if Rails.env.development?
new_rs_oauth_url(@username)
else
new_rs_oauth_url(@username, host: Setting.rs_accounts_domain)
end
storage_url = "#{remotestorage_storage_base_url}/#{@username}"
{
rel: "http://tools.ietf.org/id/draft-dejong-remotestorage",
href: storage_url,
properties: {
"http://remotestorage.io/spec/version" => "draft-dejong-remotestorage-27",
"http://tools.ietf.org/html/rfc6749#section-4.2" => auth_url,
"http://tools.ietf.org/html/rfc6749#section-3.1" => auth_url,
"http://tools.ietf.org/html/rfc6749#section-3.2" => token_endpoint_url,
"http://tools.ietf.org/html/rfc7636" => "S256",
"http://tools.ietf.org/html/rfc6750#section-2.3" => nil, # access token via a HTTP query parameter
"http://tools.ietf.org/html/rfc7233": "GET", # content range requests
"http://remotestorage.io/spec/web-authoring": nil
}
}
end
def token_endpoint_url
return rs_oauth_token_url if Rails.env.development?
rs_oauth_token_url(host: Setting.rs_accounts_domain)
end
def remotestorage_storage_base_url
return Setting.rs_storage_url unless Rails.env.development?
uri = URI.parse(Setting.rs_storage_url)
uri.host = request.host
uri.to_s
end
end