[FL-1958] U2F prototype (#879)

* U2F implementation prototype
* U2F data encryption and store, user confirmation request
* remove debug prints
* fix notification bug in chrome
* split u2f_alloc into u2f_init and u2f_alloc
* typo fix, furi-hal-trng -> furi-hal-random
* rand/srand redefinition
* SubGhz: a little bit of Dante.
* u2f_data naming fix

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/u2f/u2f.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <furi.h>
+
+typedef enum {
+    U2fNotifyRegister,
+    U2fNotifyAuth,
+    U2fNotifyWink,
+} U2fNotifyEvent;
+
+typedef struct U2fData U2fData;
+
+typedef void (*U2fEvtCallback)(U2fNotifyEvent evt, void* context);
+
+U2fData* u2f_alloc();
+
+bool u2f_init(U2fData* instance);
+
+void u2f_free(U2fData* instance);
+
+void u2f_set_event_callback(U2fData* instance, U2fEvtCallback callback, void* context);
+
+void u2f_confirm_user_present(U2fData* instance);
+
+uint16_t u2f_msg_parse(U2fData* instance, uint8_t* buf, uint16_t len);
+
+void u2f_wink(U2fData* instance);
+
+#ifdef __cplusplus
+}
+#endif