From 1c09fd9efa3ce06b980b8e493644a7d271c52747 Mon Sep 17 00:00:00 2001
From: jospaeth <spaethj@in.tum.de>
Date: Mon, 3 Aug 2020 11:58:50 +0200
Subject: major restructuring of the escrow component refine the several layers
 (CLI, API, plugins) and enable async execution

---
 src/escrow/plugin_escrow_gns.c | 67 ++++++++++++++++++++++++++++++++++--------
 1 file changed, 54 insertions(+), 13 deletions(-)

(limited to 'src/escrow/plugin_escrow_gns.c')

diff --git a/src/escrow/plugin_escrow_gns.c b/src/escrow/plugin_escrow_gns.c
index f77ef30d6..278ceff5b 100644
--- a/src/escrow/plugin_escrow_gns.c
+++ b/src/escrow/plugin_escrow_gns.c
@@ -44,7 +44,7 @@ static struct GNUNET_IDENTITY_Handle *identity_handle;
 /**
  * Handle for the plugin instance
  */
-struct EscrowPluginHandle ph;
+struct ESCROW_PluginHandle ph;
 
 
 /**
@@ -53,21 +53,28 @@ struct EscrowPluginHandle ph;
  * @param h the handle for the escrow component
  * @param ego the identity ego containing the private key
  * @param cb the function called upon completion
+ * 
+ * @return plugin operation wrapper
  */
-void
+struct ESCROW_PluginOperationWrapper *
 start_gns_key_escrow (struct GNUNET_ESCROW_Handle *h,
                       const struct GNUNET_IDENTITY_Ego *ego,
-                      GNUNET_ESCROW_AnchorContinuation cb)
+                      GNUNET_SCHEDULER_TaskCallback cb)
 {
   const struct GNUNET_CRYPTO_EcdsaPrivateKey *pk;
   sss_Keyshare keyshares;
   struct GNUNET_ESCROW_Anchor *anchor;
   int anchorDataSize;
+  struct GNUNET_ESCROW_Plugin_AnchorContinuationWrapper *w;
+
+  w = GNUNET_new (struct GNUNET_ESCROW_Plugin_AnchorContinuationWrapper);
+  w->h = h;
 
   if (NULL == ego)
   {
-    cb (h, NULL);
-    return;
+    w->escrowAnchor = NULL;
+    GNUNET_SCHEDULER_add_now (cb, w);
+    return NULL; // TODO!
   }
   pk = GNUNET_IDENTITY_ego_get_private_key (ego);
 
@@ -85,7 +92,9 @@ start_gns_key_escrow (struct GNUNET_ESCROW_Handle *h,
   // TODO: implement
   anchorDataSize = 0; // TODO!
   anchor = GNUNET_malloc (sizeof (struct GNUNET_ESCROW_Anchor) + anchorDataSize);
-  cb (h, anchor);
+  w->escrowAnchor = anchor;
+  GNUNET_SCHEDULER_add_now (cb, w);
+  return NULL; // TODO!
 }
 
 
@@ -100,7 +109,7 @@ renew_gns_key_escrow (struct GNUNET_ESCROW_Operation *op,
                       struct GNUNET_ESCROW_Anchor *escrowAnchor)
 {
   // TODO: implement
-  op->cb_renew (op->cb_cls, NULL);
+  op->cb_renew (NULL);
 }
 
 
@@ -111,15 +120,24 @@ renew_gns_key_escrow (struct GNUNET_ESCROW_Operation *op,
  * @param ego the identity ego containing the private key
  * @param escrowAnchor the escrow anchor needed to restore the key
  * @param cb the function called upon completion
+ * 
+ * @return plugin operation wrapper
  */
-void
+struct ESCROW_PluginOperationWrapper *
 verify_gns_key_escrow (struct GNUNET_ESCROW_Handle *h,
                        const struct GNUNET_IDENTITY_Ego *ego,
                        struct GNUNET_ESCROW_Anchor *escrowAnchor,
-                       GNUNET_ESCROW_VerifyContinuation cb)
+                       GNUNET_SCHEDULER_TaskCallback cb)
 {
+  struct GNUNET_ESCROW_Plugin_VerifyContinuationWrapper *w;
+
+  w = GNUNET_new (struct GNUNET_ESCROW_Plugin_VerifyContinuationWrapper);
+  w->h = h;
+
   // TODO: implement
-  cb (h, GNUNET_ESCROW_INVALID);
+  w->verificationResult = GNUNET_ESCROW_INVALID;
+  GNUNET_SCHEDULER_add_now (cb, w);
+  return NULL;
 }
 
 
@@ -130,15 +148,24 @@ verify_gns_key_escrow (struct GNUNET_ESCROW_Handle *h,
  * @param escrowAnchor the escrow anchor needed to restore the key
  * @param egoName the name of the ego to restore
  * @param cb the function called upon completion
+ * 
+ * @return plugin operation wrapper
  */
-void
+struct ESCROW_PluginOperationWrapper *
 restore_gns_key_escrow (struct GNUNET_ESCROW_Handle *h,
                         struct GNUNET_ESCROW_Anchor *escrowAnchor,
                         char *egoName,
-                        GNUNET_ESCROW_EgoContinuation cb)
+                        GNUNET_SCHEDULER_TaskCallback cb)
 {
+  struct GNUNET_ESCROW_Plugin_EgoContinuationWrapper *w;
+
+  w = GNUNET_new (struct GNUNET_ESCROW_Plugin_EgoContinuationWrapper);
+  w->h = h;
+
   // TODO: implement
-  cb (h, NULL);
+  w->ego = NULL;
+  GNUNET_SCHEDULER_add_now (cb, w);
+  return NULL;
 }
 
 
@@ -184,6 +211,19 @@ gns_anchor_data_to_string (struct GNUNET_ESCROW_Handle *h,
 }
 
 
+/**
+ * Cancel a GNS plugin operation.
+ * 
+ * @param plugin_op_wrap the plugin operation wrapper containing the operation
+ */
+void
+cancel_gns_operation (struct ESCROW_PluginOperationWrapper *plugin_op_wrap)
+{
+  // TODO: implement
+  return;
+}
+
+
 /**
  * IdentityInitContinuation for the GNS plugin
  */
@@ -213,6 +253,7 @@ libgnunet_plugin_escrow_gns_init (void *cls)
   api->verify_key_escrow = &verify_gns_key_escrow;
   api->restore_key = &restore_gns_key_escrow;
   api->anchor_string_to_data = &gns_anchor_string_to_data;
+  api->cancel_plugin_operation = &cancel_gns_operation;
 
   ph.id_init_cont = &gns_cont_init;
 
-- 
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