Adding Secure Lock to lock the device with a random 256 bit key.

This is an extra layer of security to avoid brute force attacks if PIN is too weak.
At every hard reset (on device plug), the device must be unlocked prior any other command. Once unlocked, the device can be used as usual.

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

src/hsm/sc_hsm.h

@@ -77,6 +77,7 @@ extern const uint8_t sc_hsm_aid[];
 #define HSM_OPT_RRC_RESET_ONLY      0x0020
 #define HSM_OPT_BOOTSEL_BUTTON      0x0100
 #define HSM_OPT_KEY_COUNTER_ALL     0x0200
+#define HSM_OPT_SECURE_LOCK         0x0400
 
 #define PRKD_PREFIX				0xC4		/* Hi byte in file identifier for PKCS#15 PRKD objects */
 #define CD_PREFIX				0xC8		/* Hi byte in file identifier for PKCS#15 CD objects */