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(ns mulk.benki.auth
(:refer-clojure)
(:use [clojure core repl pprint]
[hiccup core page]
[mulk.benki config util db]
[clojure.core.match
:only [match]]
[noir core]
[clojure.java.jdbc :only [transaction do-commands]])
(:require [noir.session :as session]
[noir.response :as response]
[noir.request :as request]
[clojure.java.jdbc :as sql]
[com.twinql.clojure.http :as http])
(:import [org.openid4java.consumer ConsumerManager]
[org.openid4java.message ParameterList]
[net.java.dev.sommer.foafssl.claims WebIdClaim]))
(defonce manager (ConsumerManager.))
(defn find-user [user-id]
(first (if user-id
(query "SELECT * FROM users WHERE id = ?" user-id)
nil)))
(defn return-from-openid-provider []
(let [parlist (ParameterList. (:query-params (request/ring-request)))
discovered (session/get :discovered)
;; Does the following work for POST requests?
request-uri (str (resolve-uri "/login/return")
(let [query-string (:query-string (request/ring-request))]
(if query-string
(str "?" query-string)
"")))
verification (.verify manager request-uri parlist discovered)
id (.getVerifiedId verification)]
(if id
(with-dbt
(let [openid (first (query "SELECT * FROM openids WHERE openid = ?"
(.getIdentifier id)))
user-id (if openid
(:user openid)
nil)
user (find-user user-id)]
(if user-id
(do (session/put! :user user-id)
(if-let [return-uri (session/flash-get ::return-uri)]
(redirect return-uri)
(layout {} "Authenticated!" [:p "Welcome back, " (:first_name user) "!"])))
(layout {}
"Authentication Failed"
[:p "Did not recognize OpenID."]
[:p "Your OpenID is: " [:strong (.getIdentifier id)]]))))
(layout {} "Authentication Failed" [:p "OpenID authentication failed."]))))
(defpage [:post "/login/browserid/verify"] {assertion :assertion}
;; NB. Can implement this ourselves if we want.
(let [reply (http/post "https://browserid.org/verify"
:query {:assertion assertion
:audience (:base-uri @benki-config)}
:as :json)
result (:content reply)
status (:status result)
email (:email result)]
(if (= (:status result) "okay")
(with-dbt
(let [record (first (query "SELECT * FROM user_email_addresses WHERE email = ?" email))
user-id (and record (:user record))]
(if user-id
(let [return-uri (session/flash-get ::return-uri)]
(session/put! :user user-id)
(response/json {:email email, :returnURI return-uri}))
{:status 422,
:headers {"Content-Type" "text/plain"},
:body "I couldn't find you in the database."})))
{:status 400,
:headers {"Content-Type" "text/plain"},
:body "Your BrowserID request was crooked."})))
(defpage [:post "/login/return"] []
(return-from-openid-provider))
(defpage "/login/return" []
(return-from-openid-provider))
(defpage "/login/authenticate" {openid :openid_identifier}
(let [discoveries (.discover manager openid)
discovered (.associate manager discoveries)
authreq (.authenticate manager discovered (resolve-uri "/login/return"))]
(session/put! :discovered discovered)
(redirect (.getDestinationUrl authreq true))))
(def login-page-layout
{:head
(list
[:link {:type "text/css", :rel "stylesheet", :href (resolve-uri "/3rdparty/openid-selector/css/openid.css")}])
:bottom
(list
[:script {:type "text/javascript", :src (resolve-uri "/3rdparty/openid-selector/js/openid-jquery.js")}]
[:script {:type "text/javascript", :src (resolve-uri "/3rdparty/openid-selector/js/openid-en.js")}]
[:script {:type "text/javascript", :src (resolve-uri "/js/openid-login.js")}]
)})
(defn try-webid [cert]
(log (fmt nil "Attempting WebID authentication."))
(let [webid (second (re-find #"^URI:(.*)" (:subject-alt-name cert)))
modulus (:modulus cert)
exponent (:exponent cert)
pubkey
(.generatePublic (java.security.KeyFactory/getInstance
"RSA")
(java.security.spec.RSAPublicKeySpec.
(BigInteger. (str modulus)) (BigInteger. (str exponent))))]
(log (fmt nil "Verifying WebID: ~a" webid))
(if (.verify (WebIdClaim. (java.net.URI. webid) pubkey))
(do
(log "WebID verified!")
(with-dbt
(:user
(query1 "SELECT \"user\" FROM webids WHERE webid = ?" webid))))
(log "WebID verification failed."))))
(defpage "/login" []
(let [return-uri (or (session/flash-get ::return-uri)
(get-in (request/ring-request) [:headers "referer"]))]
(with-dbt
(if-let [cert-user-id (and *client-cert*
(:user
(query1 "SELECT \"user\" FROM user_rsa_keys
WHERE modulus = (?::NUMERIC)
AND exponent = (?::NUMERIC)"
(str (:modulus *client-cert*))
(str (:exponent *client-cert*)))))]
(let [cert-user (find-user cert-user-id)]
(session/put! :user cert-user-id)
(if return-uri
(redirect return-uri)
(layout {} "Authenticated!" [:p "Welcome back, " (:first_name cert-user) "!"])))
(if-let [webid-user-id (and *client-cert* (try-webid *client-cert*))]
(let [cert-user (find-user webid-user-id)]
(session/put! :user webid-user-id)
(if return-uri
(redirect return-uri)
(layout {} "Authenticated!" [:p "Welcome back, " (:first_name cert-user) "!"])))
(do
(session/flash-put! ::return-uri return-uri)
(layout login-page-layout "Benki Login"
[:div#browserid-box
[:h2 "BrowserID login"]
[:a#browserid {:href "#"}
[:img {:src (resolve-uri "/3rdparty/browserid/sign_in_orange.png")
:alt "Sign in using BrowserID"}]]]
[:div#openid-login-panel
[:h2 "OpenID login"]
[:form {:action (resolve-uri "/login/authenticate"),
:method "GET"
:id "openid_form"}
[:div {:id "openid_choice"}
[:p "Please select your OpenID provider:"]
[:div {:id "openid_btns"}]]
[:div {:id "openid_input_area"}
[:input {:type "text", :name "openid_identifier", :id "openid_identifier"}]
[:input {:type "submit"}]]]])))))))
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