Add the rexmpp_openpgp_retract_key function

1 files changed, 53 insertions, 16 deletions

diff --git a/src/rexmpp_openpgp.c b/src/rexmpp_openpgp.c
index a87df67..ff59a7a 100644
--- a/src/rexmpp_openpgp.c
+++ b/src/rexmpp_openpgp.c
@@ -238,6 +238,27 @@ void rexmpp_pgp_key_publish_list_iq (rexmpp_t *s,
   rexmpp_log(s, LOG_INFO, "Published an OpenpPGP key list");
 }
 
+void rexmpp_pgp_key_fp_list_upload (rexmpp_t *s, xmlNodePtr metadata) {
+  xmlNodePtr keylist = xmlNewNode(NULL, "public-keys-list");
+  xmlNewNs(keylist, "urn:xmpp:openpgp:0", NULL);
+  xmlAddChild(keylist, metadata);
+
+  xmlNodePtr item = xmlNewNode(NULL, "item");
+  xmlNewNs(item, "http://jabber.org/protocol/pubsub", NULL);
+  xmlAddChild(item, keylist);
+
+  xmlNodePtr publish = xmlNewNode(NULL, "publish");
+  xmlNewNs(publish, "http://jabber.org/protocol/pubsub", NULL);
+  xmlNewProp(publish, "node", "urn:xmpp:openpgp:0:public-keys");
+  xmlAddChild(publish, item);
+
+  xmlNodePtr pubsub = xmlNewNode(NULL, "pubsub");
+  xmlNewNs(pubsub, "http://jabber.org/protocol/pubsub", NULL);
+  xmlAddChild(pubsub, publish);
+
+  rexmpp_iq_new(s, "set", NULL, pubsub, rexmpp_pgp_key_publish_list_iq);
+}
+
 void rexmpp_pgp_key_publish_iq (rexmpp_t *s,
                                 xmlNodePtr req,
                                 xmlNodePtr response,
@@ -272,27 +293,43 @@ void rexmpp_pgp_key_publish_iq (rexmpp_t *s,
     metadata->next = xmlCopyNodeList(fps);
   }
 
-  xmlNodePtr keylist = xmlNewNode(NULL, "public-keys-list");
-  xmlNewNs(keylist, "urn:xmpp:openpgp:0", NULL);
-  xmlAddChild(keylist, metadata);
-
-  xmlNodePtr item = xmlNewNode(NULL, "item");
-  xmlNewNs(item, "http://jabber.org/protocol/pubsub", NULL);
-  xmlAddChild(item, keylist);
+  rexmpp_pgp_key_fp_list_upload(s, metadata);
+}
 
-  publish = xmlNewNode(NULL, "publish");
-  xmlNewNs(publish, "http://jabber.org/protocol/pubsub", NULL);
-  xmlNewProp(publish, "node", "urn:xmpp:openpgp:0:public-keys");
-  xmlAddChild(publish, item);
+rexmpp_err_t rexmpp_openpgp_retract_key (rexmpp_t *s, const char *fp) {
+  xmlNodePtr metadata, prev = NULL;
+  for (metadata = rexmpp_published_fingerprints(s, s->assigned_jid.bare);
+       metadata != NULL;
+       prev = metadata, metadata = xmlNextElementSibling(metadata)) {
+    if (! rexmpp_xml_match(metadata, "urn:xmpp:openpgp:0", "pubkey-metadata")) {
+      continue;
+    }
+    char *fingerprint = xmlGetProp(metadata, "v4-fingerprint");
+    if (fingerprint == NULL) {
+      rexmpp_log(s, LOG_WARNING, "No fingerprint found in pubkey-metadata");
+      continue;
+    }
+    int matches = (strcmp(fingerprint, fp) == 0);
+    free(fingerprint);
+    if (matches) {
+      xmlNodePtr new_fp_list = NULL;
+      if (prev != NULL) {
+        prev->next = metadata->next;
+        new_fp_list = rexmpp_published_fingerprints(s, s->assigned_jid.bare);
+      } else {
+        new_fp_list = metadata->next;
+      }
+      xmlFreeNode(metadata);
+      rexmpp_pgp_key_fp_list_upload(s, new_fp_list);
+      break;
+    }
+  }
 
-  pubsub = xmlNewNode(NULL, "pubsub");
-  xmlNewNs(pubsub, "http://jabber.org/protocol/pubsub", NULL);
-  xmlAddChild(pubsub, publish);
+  /* TODO: delete the key node too. */
 
-  rexmpp_iq_new(s, "set", NULL, pubsub, rexmpp_pgp_key_publish_list_iq);
+  return REXMPP_SUCCESS;
 }
 
-
 rexmpp_err_t rexmpp_openpgp_publish_key (rexmpp_t *s, const char *fp) {
   if (strlen(fp) != 40) {
     rexmpp_log(s, LOG_ERR, "Wrong fingerprint length: %d", strlen(fp));