EM4x70 Authentication support

include/em4x70.h

@@ -23,6 +23,10 @@ typedef struct {
     // PIN to unlock
     uint32_t pin;
 
+    // Used for authentication
+    uint8_t rnd[7];
+    uint8_t frnd[4];
+
 } em4x70_data_t;
 
 #endif /* EM4X70_H__ */

include/pm3_cmd.h

@@ -519,6 +519,7 @@ typedef struct {
 #define CMD_LF_EM4X70_INFO                                                0x0260
 #define CMD_LF_EM4X70_WRITE                                               0x0261
 #define CMD_LF_EM4X70_UNLOCK                                              0x0262
+#define CMD_LF_EM4X70_AUTH                                                0x0263
 // Sampling configuration for LF reader/sniffer
 #define CMD_LF_SAMPLING_SET_CONFIG                                        0x021D
 #define CMD_LF_FSK_SIMULATE                                               0x021E