esp8266/modesp: Add check_fw() function to check integrity of the firmware.

Requires firmware generated by the latest makeimg.py (which stores size
and md5 of the firmware together with the firmware itself).

1 files changed, 7 insertions, 0 deletions

diff --git a/esp8266/etshal.h b/esp8266/etshal.h
index 0185a9e22..dd61ddec9 100644
--- a/esp8266/etshal.h
+++ b/esp8266/etshal.h
@@ -20,6 +20,13 @@ void ets_timer_arm_new(os_timer_t *tim, uint32_t millis, bool repeat, bool is_mi
 void ets_timer_setfn(os_timer_t *tim, ETSTimerFunc callback, void *cb_data);
 void ets_timer_disarm(os_timer_t *tim);
 
+// Opaque structure
+typedef char MD5_CTX[64];
+
+void MD5Init(MD5_CTX *context);
+void MD5Update(MD5_CTX *context, const void *data, unsigned int len);
+void MD5Final(unsigned char digest[16], MD5_CTX *context);
+
 // These prototypes are for recent SDKs with "malloc tracking"
 void *pvPortMalloc(unsigned sz, const char *fname, int line);
 void vPortFree(void *p, const char *fname, int line);