1 files changed, 47 insertions, 0 deletions
diff --git a/libdino/src/crypto/omemo/simple_pks.vala b/libdino/src/crypto/omemo/simple_pks.vala
new file mode 100644
index 00000000..f22def89
--- /dev/null
+++ b/libdino/src/crypto/omemo/simple_pks.vala
@@ -0,0 +1,47 @@
+using Gee;
+using Omemo;
+
+namespace Dino.Crypto.Omemo {
+
+public class SimplePreKeyStore : PreKeyStore {
+    public signal void pre_key_stored(Key key);
+    public signal void pre_key_deleted(Key key);
+
+    private Map<uint32, Key> pre_key_map = new HashMap<uint32, Key>();
+
+    public override uint8[]? load_pre_key(uint32 pre_key_id) throws Error {
+        if (contains_pre_key(pre_key_id)) {
+            return pre_key_map[pre_key_id].record;
+        }
+        return null;
+    }
+
+    public override void store_pre_key(uint32 pre_key_id, uint8[] record) throws Error {
+        Key key = new Key(pre_key_id, record);
+        pre_key_map[pre_key_id] = key;
+        pre_key_stored(key);
+    }
+
+    public override bool contains_pre_key(uint32 pre_key_id) throws Error {
+        return pre_key_map.has_key(pre_key_id);
+    }
+
+    public override void delete_pre_key(uint32 pre_key_id) throws Error {
+        Key key;
+        if (pre_key_map.unset(pre_key_id, out key)) {
+            pre_key_deleted(key);
+        }
+    }
+
+    public class Key {
+        public uint32 key_id { get; private set; }
+        public uint8[] record { get; private set; }
+
+        public Key(uint32 key_id, uint8[] record) {
+            this.key_id = key_id;
+            this.record = record;
+        }
+    }
+}
+
+}
+\ No newline at end of file