Adding msg version.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/fido/cmd_version.c

@@ -0,0 +1,26 @@
+/*
+ * This file is part of the Pico FIDO distribution (https://github.com/polhenarejos/pico-fido).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include "apdu.h"
+#include "hsm.h"
+
+int cmd_version() {
+    memcpy(res_APDU, "U2F_V2", strlen("U2F_V2"));
+    res_APDU_size = strlen("U2F_V2");
+    return SW_OK();
+}