messages: fix size of msg_tiny and add static_assert

trezor · Mar 20, 2018 · d6f41db · d6f41db
1 parent 559a700
commit d6f41db
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Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/firmware/messages.c b/firmware/messages.c
@@ -314,7 +314,16 @@ const uint8_t *msg_debug_out_data(void)
 
 #endif
 
-CONFIDENTIAL uint8_t msg_tiny[64];
+CONFIDENTIAL uint8_t msg_tiny[128];
+_Static_assert(sizeof(msg_tiny) >= sizeof(Cancel), "msg_tiny too tiny");
+_Static_assert(sizeof(msg_tiny) >= sizeof(Initialize), "msg_tiny too tiny");
+_Static_assert(sizeof(msg_tiny) >= sizeof(PassphraseAck), "msg_tiny too tiny");
+_Static_assert(sizeof(msg_tiny) >= sizeof(ButtonAck), "msg_tiny too tiny");
+_Static_assert(sizeof(msg_tiny) >= sizeof(PinMatrixAck), "msg_tiny too tiny");
+#if DEBUG_LINK
+_Static_assert(sizeof(msg_tiny) >= sizeof(DebugLinkDecision), "msg_tiny too tiny");
+_Static_assert(sizeof(msg_tiny) >= sizeof(DebugLinkGetState), "msg_tiny too tiny");
+#endif
 uint16_t msg_tiny_id = 0xFFFF;
 
 void msg_read_tiny(const uint8_t *buf, int len)

diff --git a/firmware/messages.h b/firmware/messages.h
@@ -47,7 +47,7 @@ bool msg_write_common(char type, uint16_t msg_id, const void *msg_ptr);
 
 void msg_read_tiny(const uint8_t *buf, int len);
 void msg_debug_read_tiny(const uint8_t *buf, int len);
-extern uint8_t msg_tiny[64];
+extern uint8_t msg_tiny[128];
 extern uint16_t msg_tiny_id;
 
 #endif