From e60cf88e22a8992c0d805450173dbe38d770618a Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Tue, 7 Jul 2009 20:05:37 +0000
Subject: Restart authentication if we think we've restarted since URL came
 back.

---
 module/consumer.cc | 49 ++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 11 deletions(-)

diff --git a/module/consumer.cc b/module/consumer.cc
index 9c5da89..bc248ad 100644
--- a/module/consumer.cc
+++ b/module/consumer.cc
@@ -151,6 +151,10 @@ public: // interface
 		: _store(store), _url(url), _index(0)
 		{ }
 
+	bool is_dumb() const
+		{ return _store ? false : true; }
+	bool has_assoc(const string& handle) const;
+
 public: // overrides
 
 	virtual void begin_queueing()
@@ -230,6 +234,23 @@ Consumer::store_assoc(const string& server, const string& handle,
 	return assoc_t(new association(server, handle, type, secret, expires_in, false));
 }
 
+bool
+Consumer::has_assoc(const string& handle) const
+{
+	sid_assoc_t data = { 0, };
+	int res;
+
+	if (!_store)
+		return false;
+
+	{
+		LockShared lock;
+		res = sid_storage_find_assoc (_store, NULL, handle.c_str(), &data);
+	}
+
+	return res ? true : false;
+}
+
 assoc_t
 Consumer::find_assoc(const string& server)
 {
@@ -274,13 +295,8 @@ Consumer::retrieve_assoc(const string& server, const string& handle)
 		}
 	}
 
-	/*
-	 * Yes, we return this when not found, it helps the user experience, if
-	 * apache restarted.
-	 */
-
 	if (!assoc)
-		throw dumb_RP("could not retrieve association for server: " + server);
+		throw failed_lookup("could not retrieve association for server: " + server);
 
 	return assoc_t(assoc);
 }
@@ -484,9 +500,10 @@ begin_auth (sid_request_t *req, Consumer &consumer, const string& trust_root,
 
 static void
 complete_auth (sid_request_t *req, Consumer &consumer, params_t &params,
-               sid_attribute_t *attributes)
+               sid_attribute_t *attributes, bool &finished)
 {
 	try {
+		finished = true;
 		consumer.id_res(params);
 		string identity = consumer.get_claimed_id();
 		sid_request_authenticated (req, identity.c_str());
@@ -501,8 +518,14 @@ complete_auth (sid_request_t *req, Consumer &consumer, params_t &params,
 		sid_request_respond (req, 403, "Bad authenticated address", NULL);
 		sid_request_log_error (req, "bad return to", ex.what());
 	} catch (id_res_failed &ex) {
-		sid_request_respond (req, 503, "Service error, try again", NULL);
-		sid_request_log_error (req, "checking response failed", ex.what());
+		/* If we don't have this association, then try again */
+		if (params.has_param("assoc_handle") && !consumer.has_assoc(params.get_param("assoc_handle"))) {
+			sid_request_log_error (req, "response from invalid association, retrying authentication", NULL);
+			finished = false;
+		} else {
+			sid_request_respond (req, 503, "Service error, try again", NULL);
+			sid_request_log_error (req, "checking response failed", ex.what());
+		}
 	} catch (exception &ex) {
 		sid_request_respond (req, 500, NULL, NULL);
 		sid_request_log_error (req, "error while completing authentication", ex.what());
@@ -536,10 +559,14 @@ sid_consumer_authenticate(sid_request_t *req, sid_storage_t *store,
 
 	/* Returning (hopefully successful) authentication */
 	if (openid.has_param("assoc_handle")) {
-		complete_auth (req, consumer, openid, attributes);
+		bool finished = true;
+		complete_auth (req, consumer, openid, attributes, finished);
+		if (finished)
+			return;
+	}
 
 	/* Returning cancelled authentication */
-	} else if (openid.has_param("mode") && openid.get_param("mode") == "cancel") {
+	if (openid.has_param("mode") && openid.get_param("mode") == "cancel") {
 		cancelled_auth (req, consumer, openid);
 
 	/* Begin a new authentication */
-- 
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