Add OMEMO message encryption and decryption

src/config/preferences.c

@@ -58,6 +58,7 @@
 #define PREF_GROUP_ALIAS "alias"
 #define PREF_GROUP_OTR "otr"
 #define PREF_GROUP_PGP "pgp"
+#define PREF_GROUP_OMEMO "omemo"
 #define PREF_GROUP_MUC "muc"
 #define PREF_GROUP_PLUGINS "plugins"
 
@@ -822,6 +823,33 @@ prefs_set_pgp_char(char ch)
     _save_prefs();
 }
 
+char
+prefs_get_omemo_char(void)
+{
+    char result = '~';
+
+    char *resultstr = g_key_file_get_string(prefs, PREF_GROUP_OMEMO, "omemo.char", NULL);
+    if (!resultstr) {
+        result =  '~';
+    } else {
+        result = resultstr[0];
+    }
+    free(resultstr);
+
+    return result;
+}
+
+void
+prefs_set_omemo_char(char ch)
+{
+    char str[2];
+    str[0] = ch;
+    str[1] = '\0';
+
+    g_key_file_set_string(prefs, PREF_GROUP_OMEMO, "omemo.char", str);
+    _save_prefs();
+}
+
 char
 prefs_get_roster_header_char(void)
 {

src/config/preferences.h

@@ -148,6 +148,7 @@ typedef enum {
     PREF_STATUSBAR_SELF,
     PREF_STATUSBAR_CHAT,
     PREF_STATUSBAR_ROOM,
+    PREF_OMEMO_LOG,
 } preference_t;
 
 typedef struct prof_alias_t {
@@ -216,6 +217,8 @@ char prefs_get_otr_char(void);
 void prefs_set_otr_char(char ch);
 char prefs_get_pgp_char(void);
 void prefs_set_pgp_char(char ch);
+char prefs_get_omemo_char(void);
+void prefs_set_omemo_char(char ch);
 
 char prefs_get_roster_header_char(void);
 void prefs_set_roster_header_char(char ch);