Merge branch 'dev' of https://github.com/gkdr/lurch into dev

.appveyor.yml

@@ -11,10 +11,10 @@ build_script:
 - sh: make
 
 test_script:
-- sh: CMOCKA_MESSAGE_OUTPUT=XML CMOCKA_XML_FILE=build/cmocka_results.xml make test
+- sh: CMOCKA_MESSAGE_OUTPUT=XML CMOCKA_XML_FILE=build/cmocka_results_%g.xml make test --ignore-errors
 
 after_test:
-- sh: curl -v -F "file=@$APPVEYOR_BUILD_FOLDER/build/cmocka_results.xml" "https://ci.appveyor.com/api/testresults/junit/$APPVEYOR_JOB_ID"
+- sh: find build/ -type f -name *.xml -exec curl -v -F "file=@$APPVEYOR_BUILD_FOLDER/{}" "https://ci.appveyor.com/api/testresults/junit/$APPVEYOR_JOB_ID" \;
 - sh: bash <(curl -s https://codecov.io/bash) -g test/ -B $APPVEYOR_REPO_BRANCH -b $APPVEYOR_BUILD_VERSION
 
 artifacts:

Makefile

@@ -58,13 +58,7 @@ PLUGIN_CPPFLAGS=-DPURPLE_PLUGINS
 # -D_BSD_SOURCE can be removed once nobody uses glibc <= 2.18 any more
 CPPFLAGS += -D_XOPEN_SOURCE=700 -D_BSD_SOURCE -D_DEFAULT_SOURCE
 LDFLAGS += -ldl -lm $(PKGCFG_L) $(LJABBER) -Wl,-rpath,$(PURPLE_PLUGIN_DIR)
-LDFLAGS_T=$(LDFLAGS) -lpurple -lcmocka \
-	-Wl,--wrap=purple_user_dir \
-	-Wl,--wrap=purple_prefs_get_bool \
-	-Wl,--wrap=purple_prefs_get_int \
-	-Wl,--wrap=purple_debug_error \
-	-Wl,--wrap=purple_debug_info \
-	-Wl,--wrap=purple_debug_misc \
+LDFLAGS_T=$(LDFLAGS) -lpurple -lcmocka 
 
 ### directories
 #
@@ -95,6 +89,7 @@ OBJECTS := $(patsubst $(SDIR)/%.c, $(BDIR)/%.o, $(SOURCES))
 OBJECTS_W_COVERAGE := $(patsubst $(SDIR)/%.c, $(BDIR)/%_w_coverage.o, $(SOURCES))
 TEST_SOURCES := $(wildcard $(TDIR)/test_*.c)
 TEST_OBJECTS := $(patsubst $(TDIR)/test_%.c, $(BDIR)/test_%.o, $(TEST_SOURCES))
+TEST_TARGETS := $(patsubst $(TDIR)/test_%.c, $(BDIR)/test_%, $(TEST_SOURCES))
 VENDOR_LIBS=$(LOMEMO_PATH) $(AXC_PATH) $(AX_PATH)
 
 
@@ -157,9 +152,41 @@ tarball: | clean-all $(BDIR)
 	mv $(TARBALL_FILE_NAME) $(TARBALL_DIR_NAME)/
 	mv $(TARBALL_DIR_NAME) $(BDIR)/
 
-test: $(TEST_OBJECTS) $(OBJECTS_W_COVERAGE) $(VENDOR_LIBS)
-	$(CC) $(CFLAGS) $(CPPFLAGS) -O0 --coverage $^ $(PURPLE_DIR)/libjabber.so.0 -o $(BDIR)/$@ $(LDFLAGS_T)
-	-$(BDIR)/$@ 2>&1 | grep -Ev ".*CRITICAL.*" | tr -s '\n' # filter annoying and irrelevant glib output
+$(BDIR)/test_lurch_util: $(OBJECTS_W_COVERAGE) $(VENDOR_LIBS) $(BDIR)/test_lurch_util.o
+	$(CC) $(CFLAGS) $(CPPFLAGS) -O0 --coverage $^ $(PURPLE_DIR)/libjabber.so.0 -o $@ $(LDFLAGS_T) \
+	-Wl,--wrap=purple_user_dir \
+	-Wl,--wrap=purple_prefs_get_bool \
+	-Wl,--wrap=purple_prefs_get_int \
+	-Wl,--wrap=purple_debug_error \
+	-Wl,--wrap=purple_debug_info \
+	-Wl,--wrap=purple_debug_misc \
+	-Wl,--wrap=purple_base16_encode_chunked
+	bash -c "set -o pipefail; $@ 2>&1 | grep -Ev ".*CRITICAL.*" | tr -s '\n'" # filter annoying and irrelevant glib output
+
+$(BDIR)/test_lurch_api: $(OBJECTS_W_COVERAGE) $(VENDOR_LIBS) $(BDIR)/test_lurch_api.o
+	$(CC) $(CFLAGS) $(CPPFLAGS) -O0 --coverage $^ $(PURPLE_DIR)/libjabber.so.0 -o $@ $(LDFLAGS_T) \
+	-Wl,--wrap=purple_account_get_username \
+	-Wl,--wrap=purple_account_get_connection \
+	-Wl,--wrap=purple_signal_register \
+	-Wl,--wrap=purple_signal_unregister \
+	-Wl,--wrap=purple_signal_connect \
+	-Wl,--wrap=purple_signal_disconnect \
+	-Wl,--wrap=purple_find_conversation_with_account \
+	-Wl,--wrap=jabber_pep_publish \
+	-Wl,--wrap=jabber_chat_find_by_conv \
+	-Wl,--wrap=axc_get_device_id \
+	-Wl,--wrap=axc_key_load_public_own \
+	-Wl,--wrap=axc_key_load_public_addr \
+	-Wl,--wrap=axc_session_exists_any \
+	-Wl,--wrap=omemo_storage_user_devicelist_retrieve \
+	-Wl,--wrap=omemo_storage_chatlist_delete \
+	-Wl,--wrap=omemo_storage_chatlist_save \
+	-Wl,--wrap=omemo_storage_chatlist_exists \
+	-Wl,--wrap=omemo_storage_user_devicelist_retrieve \
+	-Wl,--wrap=lurch_util_fp_get_printable
+	bash -c "set -o pipefail; $@ 2>&1 | grep -Ev ".*CRITICAL.*" | tr -s '\n'" # filter annoying and irrelevant glib output
+
+test: $(OBJECTS_W_COVERAGE) $(VENDOR_LIBS) $(TEST_TARGETS)
 
 coverage: test
 	gcovr -r . --html --html-details -o build/coverage.html

libomemo @ e3b2125e

-Subproject commit 3c8268172829996ec1f1e7b7a12df5c63ceb0ef1
+Subproject commit e3b2125eb630e7137ea2b904bf4ddc6bdc106092

src/lurch.c

@@ -37,8 +37,6 @@
 #define JABBER_MAX_LEN_DOMAIN 1023
 #define JABBER_MAX_LEN_BARE JABBER_MAX_LEN_NODE + JABBER_MAX_LEN_DOMAIN + 1
 
-#define LURCH_ACC_SETTING_INITIALIZED "lurch_initialised"
-
 #define LURCH_ERR_STRING_ENCRYPT "There was an error encrypting the message and it was not sent. " \
                                  "You can try again, or try to find the problem by looking at the debug log."
 #define LURCH_ERR_STRING_DECRYPT "There was an error decrypting an OMEMO message addressed to this device. " \
@@ -146,6 +144,9 @@ static char * lurch_queue_make_key_string_s(const char * name, const char * devi
  * Does the first-time install of the axc DB.
  * As specified in OMEMO, it checks if the generated device ID already exists.
  * Therefore, it should be called at a point in time when other entries exist.
+ * 
+ * If an initialized DB already exists, this function exits with success without doing anything.
+ * This is checked by trying to retrieve the device ID from it.
  *
  * @param uname The username.
  * @return 0 on success, negative on error.
@@ -996,7 +997,6 @@ static void lurch_pep_own_devicelist_request_handler(JabberStream * js_p, const
   int len = 0;
   PurpleAccount * acc_p = (void *) 0;
   char * uname = (void *) 0;
-  int install = 0;
   axc_context * axc_ctx_p = (void *) 0;
   uint32_t own_id = 0;
   int needs_publishing = 1;
@@ -1007,9 +1007,7 @@ static void lurch_pep_own_devicelist_request_handler(JabberStream * js_p, const
   acc_p = purple_connection_get_account(js_p->gc);
   uname = lurch_util_uname_strip(purple_account_get_username(acc_p));
 
-  install = (purple_account_get_bool(acc_p, LURCH_ACC_SETTING_INITIALIZED, FALSE)) ? 0 : 1;
-
-  if (install && !uninstall) {
+  if (!uninstall) {
     purple_debug_info("lurch", "%s: %s\n", __func__, "preparing installation...");
     ret_val = lurch_axc_prepare(uname);
     if (ret_val) {
@@ -1092,10 +1090,6 @@ static void lurch_pep_own_devicelist_request_handler(JabberStream * js_p, const
     goto cleanup;
   }
 
-  if (install && !uninstall) {
-    purple_account_set_bool(acc_p, LURCH_ACC_SETTING_INITIALIZED, TRUE);
-  }
-
   ret_val = lurch_devicelist_process(uname, dl_p, js_p);
   if (ret_val) {
     err_msg_dbg = g_strdup_printf("failed to process the devicelist");
@@ -1157,25 +1151,24 @@ cleanup:
 
 /**
  * Set as callback for the "account connected" signal.
- * Requests the own devicelist, as that requires an active connection (as
- * opposed to just registering PEP handlers).
- * Also inits the msg queue hashtable.
+ * Requests the own devicelist, as that requires an active connection (as opposed to just registering PEP handlers).
  */
 static void lurch_account_connect_cb(PurpleAccount * acc_p) {
   int ret_val = 0;
 
-  char * uname = (void *) 0;
   JabberStream * js_p = (void *) 0;
+  char * uname = (void *) 0;
   char * dl_ns = (void *) 0;
 
- // purple_account_set_bool(acc_p, LURCH_ACC_SETTING_INITIALIZED, FALSE);
-
   js_p = purple_connection_get_protocol_data(purple_account_get_connection(acc_p));
 
   if (strncmp(purple_account_get_protocol_id(acc_p), JABBER_PROTOCOL_ID, strlen(JABBER_PROTOCOL_ID))) {
     return;
   }
 
+  // remove unused account preferences
+  purple_account_remove_setting(acc_p, "lurch_initialised");
+
   ret_val = omemo_devicelist_get_pep_node_name(&dl_ns);
   if (ret_val) {
     purple_debug_error("lurch", "%s: %s (%i)\n", __func__, "failed to get devicelist pep node name", ret_val);
@@ -2142,7 +2135,6 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
   uint32_t id = 0;
   uint32_t remove_id = 0;
   axc_buf * key_buf_p = (void *) 0;
-  gchar * fp = (void *) 0;
   char * fp_printable = (void *) 0;
   omemo_devicelist * own_dl_p = (void *) 0;
   omemo_devicelist * other_dl_p = (void *) 0;
@@ -2205,7 +2197,6 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
       }
 
       uninstall = 1;
-      purple_account_set_bool(purple_conversation_get_account(conv_p), LURCH_ACC_SETTING_INITIALIZED, FALSE);
       dl_node_p = xmlnode_from_str(temp_msg_1, -1);
       jabber_pep_publish(purple_connection_get_protocol_data(purple_conversation_get_gc(conv_p)), dl_node_p);
       msg = g_strdup_printf("Published devicelist minus this device's ID. "
@@ -2302,8 +2293,7 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
               goto cleanup;
             }
 
-            fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-            fp_printable = lurch_util_fp_get_printable(fp);
+            fp_printable = lurch_util_fp_get_printable(key_buf_p);
             msg = g_strdup_printf("This device's fingerprint is:\n%s\n"
                                   "You should make sure that your conversation partner gets displayed the same for this device.", fp_printable);
           } else if (!g_strcmp0(args[2], "conv")) {
@@ -2314,8 +2304,7 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
               goto cleanup;
             }
 
-            fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-            fp_printable = lurch_util_fp_get_printable(fp);
+            fp_printable = lurch_util_fp_get_printable(key_buf_p);
 
             temp_msg_1 = g_strdup_printf("The devices participating in this conversation and their fingerprints are as follows:\n"
                                          "This device's (%s:%i) fingerprint:\n%s\n", uname, id, fp_printable);
@@ -2337,9 +2326,7 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
                   continue;
                 }
 
-                g_free(fp);
-                fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-                fp_printable = lurch_util_fp_get_printable(fp);
+                fp_printable = lurch_util_fp_get_printable(key_buf_p);
                 axc_buf_free(key_buf_p);
                 key_buf_p = (void *) 0;
 
@@ -2371,9 +2358,7 @@ static PurpleCmdRet lurch_cmd_func(PurpleConversation * conv_p,
                 continue;
               }
 
-              g_free(fp);
-              fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-              fp_printable = lurch_util_fp_get_printable(fp);
+              fp_printable = lurch_util_fp_get_printable(key_buf_p);
               axc_buf_free(key_buf_p);
               key_buf_p = (void *) 0;
 
@@ -2475,7 +2460,6 @@ cleanup:
   axc_context_destroy_all(axc_ctx_p);
   g_free(msg);
   axc_buf_free(key_buf_p);
-  g_free(fp);
   g_free(fp_printable);
   omemo_devicelist_destroy(own_dl_p);
   omemo_devicelist_destroy(other_dl_p);

src/lurch_api.c

@@ -2,6 +2,7 @@
 #include <glib.h>
 #include <purple.h>
 
+#include "chat.h"
 #include "pep.h"
 
 #include "axc.h"
@@ -185,12 +186,49 @@ void lurch_api_disable_im_handler(PurpleAccount * acc_p, const char * contact_ba
   g_free(db_fn_omemo);
 }
 
+void lurch_api_enable_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, void * user_data_p), void * user_data_p) {
+  int32_t ret_val = 0;
+  char * uname = (void *) 0;
+  char * db_fn_omemo = (void *) 0;
+
+  uname = lurch_util_uname_strip(purple_account_get_username(acc_p));
+  db_fn_omemo = lurch_util_uname_get_db_fn(uname, LURCH_DB_NAME_OMEMO);
+
+  ret_val = omemo_storage_chatlist_save(full_conversation_name, db_fn_omemo);
+  if (ret_val) {
+    purple_debug_error(MODULE_NAME, "Failed to enable OMEMO for chat %s using DB %s.\n", full_conversation_name, db_fn_omemo);
+  }
+
+  cb(ret_val, user_data_p);
+
+  g_free(uname);
+  g_free(db_fn_omemo);
+}
+
+void lurch_api_disable_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, void * user_data_p), void * user_data_p) {
+  int32_t ret_val = 0;
+  char * uname = (void *) 0;
+  char * db_fn_omemo = (void *) 0;
+
+  uname = lurch_util_uname_strip(purple_account_get_username(acc_p));
+  db_fn_omemo = lurch_util_uname_get_db_fn(uname, LURCH_DB_NAME_OMEMO);
+
+  ret_val = omemo_storage_chatlist_delete(full_conversation_name, db_fn_omemo);
+  if (ret_val) {
+    purple_debug_error(MODULE_NAME, "Failed to disable OMEMO for chat %s using DB %s.\n", full_conversation_name, db_fn_omemo);
+  }
+
+  cb(ret_val, user_data_p);
+
+  g_free(uname);
+  g_free(db_fn_omemo);
+}
+
 void lurch_api_fp_get_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, const char * fp_printable, void * user_data_p), void * user_data_p) {
   int32_t ret_val = 0;
   char * uname = (void *) 0;
   axc_context * axc_ctx_p = (void *) 0;
   axc_buf * key_buf_p = (void *) 0;
-  gchar * fp = (void *) 0;
   char * fp_printable = (void *) 0;
 
   uname = lurch_util_uname_strip(purple_account_get_username(acc_p));
@@ -207,20 +245,18 @@ void lurch_api_fp_get_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, con
     goto cleanup;
   }
 
-  fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-  fp_printable = lurch_util_fp_get_printable(fp);
+  fp_printable = lurch_util_fp_get_printable(key_buf_p);
 
 cleanup:
   cb(ret_val, fp_printable, user_data_p);
 
   g_free(fp_printable);
-  g_free(fp);
   axc_buf_free(key_buf_p);
   axc_context_destroy_all(axc_ctx_p);
 }
 
 /**
- * Given a list of IDs, retrieves the public keys from the libsignal sessions and creates hash table with ID to fingerprint pairs.
+ * Given a list of IDs, retrieves the public keys from the libsignal sessions and creates a hash table with ID to fingerprint pairs.
  * If there is an entry in the devicelist, but no session yet, the fingerprint cannot be retrieved this way and the value will be NULL.
  * g_hash_table_destroy() the table when done with it.
  */
@@ -230,7 +266,6 @@ static int32_t lurch_api_fp_create_table(const char * jid,  axc_context * axc_ct
   const GList * curr_p = (void *) 0;
   uint32_t curr_device_id = 0;
   axc_buf * key_buf_p = (void *) 0;
-  gchar * fp = (void *) 0;
 
   id_fp_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, g_free);
 
@@ -247,13 +282,10 @@ static int32_t lurch_api_fp_create_table(const char * jid,  axc_context * axc_ct
       continue;
     }
 
-    fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-    (void) g_hash_table_insert(id_fp_table, curr_p->data, lurch_util_fp_get_printable(fp));
+    (void) g_hash_table_insert(id_fp_table, curr_p->data, lurch_util_fp_get_printable(key_buf_p));
 
     axc_buf_free(key_buf_p);
     key_buf_p = (void *) 0;
-    g_free(fp);
-    fp = (void *) 0;
 
     ret_val = 0;
   }
@@ -276,7 +308,6 @@ void lurch_api_fp_list_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, GH
   axc_context * axc_ctx_p = (void *) 0;
   GHashTable * id_fp_table = (void *) 0;
   axc_buf * key_buf_p = (void *) 0;
-  gchar * fp = (void *) 0;
 
   ret_val = lurch_api_id_list_get_own(acc_p, &own_id_list);
   if (ret_val) {
@@ -306,10 +337,7 @@ void lurch_api_fp_list_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, GH
     goto cleanup;
   }
 
-  fp = purple_base16_encode_chunked(axc_buf_get_data(key_buf_p), axc_buf_get_len(key_buf_p));
-  (void) g_hash_table_insert(id_fp_table, own_id_list->data, lurch_util_fp_get_printable(fp));
-  g_free(fp);
-  fp = (void *) 0;
+  (void) g_hash_table_insert(id_fp_table, own_id_list->data, lurch_util_fp_get_printable(key_buf_p));
 
 cleanup:
   cb(ret_val, id_fp_table, user_data_p);
@@ -319,7 +347,6 @@ cleanup:
   axc_context_destroy_all(axc_ctx_p);
   g_hash_table_destroy(id_fp_table);
   axc_buf_free(key_buf_p);
-  g_free(fp);
 }
 
 // returns NULL as hash table if devicelist is empty
@@ -434,6 +461,89 @@ cleanup:
   axc_context_destroy_all(axc_ctx_p);
 }
 
+void lurch_api_status_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, lurch_status_chat_t status, void * user_data_p), void * user_data_p) {
+  int32_t ret_val = 0;
+  lurch_status_chat_t status = LURCH_STATUS_CHAT_DISABLED;
+
+  char * uname = (void *) 0;
+  char * db_fn_omemo = (void *) 0;
+
+  PurpleConversation * conv_p = (void *) 0;
+  JabberChat * muc_p = (void *) 0;
+  GList * curr_item_p = (void *) 0;
+  JabberChatMember * curr_muc_member_p = (void *) 0;
+  char * curr_muc_member_bare_jid = (void *) 0;
+  omemo_devicelist * curr_dl_p = (void *) 0;
+
+  uname = lurch_util_uname_strip(purple_account_get_username(acc_p));
+  db_fn_omemo = lurch_util_uname_get_db_fn(uname, LURCH_DB_NAME_OMEMO);
+
+  conv_p = purple_find_conversation_with_account(PURPLE_CONV_TYPE_CHAT, full_conversation_name, acc_p);
+  if (!conv_p) {
+    purple_debug_error(MODULE_NAME, "Could not find groupchat %s.\n", full_conversation_name);
+    ret_val = EXIT_FAILURE;
+    goto cleanup;
+  }
+
+  muc_p = jabber_chat_find_by_conv(conv_p);
+  if (!muc_p) {
+    purple_debug_error(MODULE_NAME, "Could not find the data for groupchat %s.\n", full_conversation_name);
+    ret_val = EXIT_FAILURE;
+    goto cleanup;
+  }
+
+  for (curr_item_p = g_hash_table_get_values(muc_p->members); curr_item_p; curr_item_p = curr_item_p->next) {
+    curr_muc_member_p = (JabberChatMember *) curr_item_p->data;
+    curr_muc_member_bare_jid = jabber_get_bare_jid(curr_muc_member_p->jid);
+
+    if (!curr_muc_member_bare_jid) {
+      purple_debug_warning(
+        MODULE_NAME,
+        "Could not get the JID of chat member with handle %s, which probably means the chat is anonymous.\n",
+        curr_muc_member_p->handle
+      );
+
+      status = LURCH_STATUS_CHAT_ANONYMOUS;
+      goto cleanup;
+    }
+
+    ret_val = omemo_storage_user_devicelist_retrieve(curr_muc_member_bare_jid, db_fn_omemo, &curr_dl_p);
+    if (ret_val) {
+      purple_debug_error(MODULE_NAME, "Could not retrieve the devicelist for %s from %s.\n", curr_muc_member_bare_jid, db_fn_omemo);
+      goto cleanup;
+    }
+
+    if (omemo_devicelist_is_empty(curr_dl_p)) {
+      purple_debug_warning(
+        MODULE_NAME,
+        "Could not find %s's devicelist in chat %s. The user is probably not in %s's contact list.\n",
+        curr_muc_member_bare_jid, full_conversation_name, uname
+      );
+
+      status = LURCH_STATUS_CHAT_NO_DEVICELIST;
+      goto cleanup;
+    }
+
+
+    g_free(curr_muc_member_bare_jid);
+    curr_muc_member_bare_jid = (void *) 0;
+
+    omemo_devicelist_destroy(curr_dl_p);
+    curr_dl_p = (void *) 0;
+  }
+
+  status = LURCH_STATUS_CHAT_OK;
+
+cleanup:
+  cb(ret_val, status, user_data_p);
+
+  g_free(uname);
+  g_free(db_fn_omemo);
+  // if loop was exited early
+  g_free(curr_muc_member_bare_jid);
+  omemo_devicelist_destroy(curr_dl_p);
+}
+
 static void lurch_api_marshal_VOID__POINTER_INT_POINTER_POINTER(PurpleCallback cb, va_list args, void * data, void ** return_val) {
 	void * arg1 = va_arg(args, void *);
 	gint32 arg2 = va_arg(args, guint);
@@ -454,13 +564,15 @@ typedef enum {
  * When adding a new signal: increase this number and add the name, handler function, and handler function type
  * to the respective array.
  */
-#define NUM_OF_SIGNALS 8
+#define NUM_OF_SIGNALS 11
 
 const char * signal_names[NUM_OF_SIGNALS] = {
   "lurch-id-list",
   "lurch-id-remove",
   "lurch-enable-im",
   "lurch-disable-im",
+  "lurch-enable-chat",
+  "lurch-disable-chat",
   "lurch-fp-get",
   "lurch-fp-list",
   "lurch-fp-other",
@@ -472,6 +584,8 @@ const void * signal_handlers[NUM_OF_SIGNALS] = {
   lurch_api_id_remove_handler,
   lurch_api_enable_im_handler,
   lurch_api_disable_im_handler,
+  lurch_api_enable_chat_handler,
+  lurch_api_disable_chat_handler,
   lurch_api_fp_get_handler,
   lurch_api_fp_list_handler,
   lurch_api_fp_other_handler,
@@ -483,6 +597,8 @@ const lurch_api_handler_t signal_handler_types[NUM_OF_SIGNALS] = {
   LURCH_API_HANDLER_ACC_DID_CB_DATA,
   LURCH_API_HANDLER_ACC_JID_CB_DATA,
   LURCH_API_HANDLER_ACC_JID_CB_DATA,
+  LURCH_API_HANDLER_ACC_JID_CB_DATA,
+  LURCH_API_HANDLER_ACC_JID_CB_DATA,
   LURCH_API_HANDLER_ACC_CB_DATA,
   LURCH_API_HANDLER_ACC_CB_DATA,
   LURCH_API_HANDLER_ACC_JID_CB_DATA,
@@ -563,4 +679,4 @@ void lurch_api_unload() {
 
     purple_signal_unregister(plugins_handle_p, signal_name);
   }
-}
\ No newline at end of file
+}

src/lurch_api.h

@@ -5,6 +5,20 @@
 #define LURCH_ERR_NO_BUNDLE          -1000010
 #define LURCH_ERR_DEVICE_NOT_IN_LIST -1000100
 
+typedef enum {
+    LURCH_STATUS_DISABLED = 0,  // manually disabled
+    LURCH_STATUS_NOT_SUPPORTED, // no OMEMO support, i.e. there is no devicelist node
+    LURCH_STATUS_NO_SESSION,    // OMEMO is supported, but there is no libsignal session yet
+    LURCH_STATUS_OK             // OMEMO is supported and session exists
+} lurch_status_t;
+
+typedef enum {
+    LURCH_STATUS_CHAT_DISABLED = 0,  // OMEMO was not manually enabled
+    LURCH_STATUS_CHAT_ANONYMOUS,     // chat is anonymous, i.e. a member's JID could not be accessed
+    LURCH_STATUS_CHAT_NO_DEVICELIST, // a member's devicelist could not be accessed, probably because s/he is not a contact
+    LURCH_STATUS_CHAT_OK             // in theory, OMEMO should work
+} lurch_status_chat_t;
+
 /**
  * Initializes the API by registering the signals and signal handlers.
  */
@@ -15,14 +29,6 @@ void lurch_api_init();
 */
 void lurch_api_unload();
 
-typedef enum {
-    LURCH_STATUS_DISABLED = 0,  // manually disabled
-    LURCH_STATUS_NOT_SUPPORTED, // no OMEMO support, i.e. there is no devicelist node
-    LURCH_STATUS_NO_SESSION,    // OMEMO is supported, but there is no libsignal session yet
-    LURCH_STATUS_OK             // OMEMO is supported and session exists
-} lurch_status_t;
-
-
 /**
  * USAGE
  * 
@@ -43,4 +49,88 @@ typedef enum {
  * - Emit the signal using the plugin system handle as the instance and pass the necessary data.
  *   If you do it wrong, there will be no compiler errors and the pointers are gibberish, so take care.
  *   You can easily get the plugin system handle anywhere by calling purple_plugins_get_handle().
- */
\ No newline at end of file
+ */
+
+/**
+ * SIGNAL: lurch-id-list
+ *
+ * Gets the specified account's OMEMO devicelist and passes it to the callback as a GList containing uint32_t *.
+ * To access the actual ID, cast the data member to a uint32_t * and dereference it.
+ * This device's ID will be the first item in the list.
+ */
+void lurch_api_id_list_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, GList * id_list, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-id-remove
+ *
+ * Removes the specified OMEMO device ID from the specified account's devicelist.
+ */
+void lurch_api_id_remove_handler(PurpleAccount * acc_p, uint32_t device_id, void (*cb)(int32_t err, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-enable-im
+ *
+ * Enables OMEMO for the specified contact.
+ */
+void lurch_api_enable_im_handler(PurpleAccount * acc_p, const char * contact_bare_jid, void (*cb)(int32_t err, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-disable-im
+ *
+ * Disables OMEMO for the specified contact.
+ */
+void lurch_api_disable_im_handler(PurpleAccount * acc_p, const char * contact_bare_jid, void (*cb)(int32_t err, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-enable-chat
+ * 
+ * Enables OMEMO for the specified chat. The conversation name can be obtained by simply calling purple_conversation_get_name().
+ */
+void lurch_api_enable_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-disable-chat
+ * 
+ * Disables OMEMO for the specified chat.
+ */
+void lurch_api_disable_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-fp-get
+ *
+ * Gets the this device's fingerprint in a printable format.
+ */
+void lurch_api_fp_get_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, const char * fp_printable, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-fp-list
+ *
+ * Gets the fingerprints of all devices belonging to the specified account and creates a device-ID-to-fingerprint table.
+ * This is based on sessions, so if there is an entry in the OMEMO devicelist, but no libsignal session yet, the value will be NULL.
+ * If the whole devicelist is empty, i.e. the account is not an OMEMO user, the whole table will be NULL.
+ * Watch out as this is not a valid GHashTable.
+ */
+void lurch_api_fp_list_handler(PurpleAccount * acc_p, void (*cb)(int32_t err, GHashTable * id_fp_table, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-fp-other
+ *
+ * Same as above, but for the specified contact.
+ */
+void lurch_api_fp_other_handler(PurpleAccount * acc_p, const char * contact_bare_jid, void (*cb)(int32_t err, GHashTable * id_fp_table, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-status-im
+ *
+ * Checks the OMEMO status for the given contact. Result is one of lurch_status_t.
+ */
+void lurch_api_status_im_handler(PurpleAccount * acc_p, const char * contact_bare_jid, void (*cb)(int32_t err, lurch_status_t status, void * user_data_p), void * user_data_p);
+
+/**
+ * SIGNAL: lurch-status-chat
+ * 
+ * Checks the OMEMO status for a MUC.
+ * It not only looks up whether OMEMO was enabled, but also checks the preconditions for this feature, i.e.
+ * whether all chat members' JIDs are visible (non-anonymous) and their devicelists accessible (in contact list). 
+ */
+void lurch_api_status_chat_handler(PurpleAccount * acc_p, const char * full_conversation_name, void (*cb)(int32_t err, lurch_status_chat_t status, void * user_data_p), void * user_data_p);

src/lurch_cmd_ui.c

@@ -175,6 +175,35 @@ void lurch_status_im_print(int32_t err, lurch_status_t status, void * user_data_
   lurch_cmd_print(conv_p, msg);
 }
 
+void lurch_status_chat_print(int32_t err, lurch_status_chat_t status, void * user_data_p) {
+  PurpleConversation * conv_p = (PurpleConversation *) user_data_p;
+  const char * msg = (void *) 0;
+
+  if (err) {
+    lurch_cmd_print_err(conv_p, "Failed to get the conversation status. Check the debug log for details.");
+    return;
+  }
+
+  switch (status) {
+    case LURCH_STATUS_CHAT_DISABLED:
+      msg = "OMEMO was not enabled for this conversation. Type '/lurch enable' to switch it on.";
+      break;
+    case LURCH_STATUS_CHAT_ANONYMOUS:
+      msg = "Could not access the JID of at least one of the chat members. The MUC is probably set to anonymous.";
+      break;
+    case LURCH_STATUS_CHAT_NO_DEVICELIST:
+      msg = "Could not access the OMEMO devicelist of at least one of the chat members. Make sure every member is in every other member's contact list.";