Minor improvements

- almost irrelevant documentation updates
- introduced id_res_expired_on_delivery exception to be thrown if the
  association has expired right before it could've been used for signature
  verification.

Signed-off-by: Michael Krelin <hacker@klever.net>

3 files changed, 18 insertions, 3 deletions

diff --git a/include/opkele/consumer.h b/include/opkele/consumer.h
index 50ff692..c463787 100644
--- a/include/opkele/consumer.h
+++ b/include/opkele/consumer.h
@@ -69,2 +69,7 @@ namespace opkele {
              *
+             * @note
+             * It may be a good idea to pre-expire associations shortly before
+             * their time is really up to avoid association expiry in the
+             * middle of negotiations.
+             *
              * @param server the OpenID server
@@ -139,2 +144,3 @@ namespace opkele {
              * @throw id_res_failed in case of failure
+             * @throw id_res_expired_on_delivery if the association expired before it could've been verified
              * @throw exception in case of other failures
diff --git a/include/opkele/exception.h b/include/opkele/exception.h
index 753a818..2ff44b7 100644
--- a/include/opkele/exception.h
+++ b/include/opkele/exception.h
@@ -172,2 +172,11 @@ namespace opkele {
     /**
+     * thrown if the association has expired before it could've been verified.
+     */
+    class id_res_expired_on_delivery : public id_res_failed {
+        public:
+            id_res_expired_on_delivery(OPKELE_E_PARS)
+                : id_res_failed(OPKELE_E_CONS) { }
+    };
+
+    /**
      * openssl malfunction occured
diff --git a/lib/consumer.cc b/lib/consumer.cc
index 66db7dd..9f7530f 100644
--- a/lib/consumer.cc
+++ b/lib/consumer.cc
@@ -186,4 +186,4 @@ namespace opkele {
             assoc_t assoc = retrieve_assoc(server,pin.get_param("openid.assoc_handle"));
-            if(assoc->is_expired()) /* TODO: or should I throw some other exception to force programmer fix his implementation? */
-                throw failed_lookup(OPKELE_CP_ "retrieve_assoc() has returned expired handle");
+            if(assoc->is_expired())
+                throw id_res_expired_on_delivery(OPKELE_CP_ "retrieve_assoc() has returned expired handle");
             const string& sigenc = pin.get_param("openid.sig");
@@ -216,3 +216,3 @@ namespace opkele {
                 throw id_res_mismatch(OPKELE_CP_ "signature mismatch");
-        }catch(failed_lookup& e) { /* XXX: more specific? */
+        }catch(failed_lookup& e) {
             const string& slist = pin.get_param("openid.signed");