diff --git a/include/shared.h b/include/shared.h
index 4c18aa561..ac4042226 100644
--- a/include/shared.h
+++ b/include/shared.h
@@ -104,6 +104,8 @@ int  generic_salt_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, const u8
 
 int input_tokenizer (const u8 *input_buf, const int input_len, hc_token_t *token);
 
+int extract_dynamic_x (const u8 *input_buf);
+
 #if defined (__APPLE__)
 bool is_apple_silicon (void);
 #endif
diff --git a/src/shared.c b/src/shared.c
index 2dbc48548..f141e25fc 100644
--- a/src/shared.c
+++ b/src/shared.c
@@ -1483,3 +1483,32 @@ char *file_to_buffer (const char *filename)
 
   return NULL;
 }
+
+int extract_dynamic_x (const u8 *input_buf)
+{
+/*
+  if (input_len < 12) return -1;
+
+  if (input_buf[0] != '$') return -1;
+  if (input_buf[1] != 'd') return -1;
+  if (input_buf[2] != 'y') return -1;
+  if (input_buf[3] != 'n') return -1;
+  if (input_buf[4] != 'a') return -1;
+  if (input_buf[5] != 'm') return -1;
+  if (input_buf[6] != 'i') return -1;
+  if (input_buf[7] != 'c') return -1;
+  if (input_buf[8] != '_') return -1;
+
+  int digit_len = 0;
+
+  for (int i = 0; i < input_len; i++)
+  {
+
+  }
+*/
+  int hash_mode = -1;
+
+  if (sscanf ((char *) input_buf, "$dynamic_%d$", &hash_mode) != 1) return -1;
+
+  return hash_mode;
+}