Fix hf mf setuid on Gen3 7 Byte UID Tag.

Author: whywilson

script/pn532_cli_unit.py

@@ -1374,7 +1374,8 @@ def args_parser(self) -> ArgumentParserNoExit:
 examples:
   hf mf setuid -u 11223344
   hf mf setuid -u 11223344 -g 2
-  hf mf setuid --blk0 1122334444080400aabbccddeeff1122 -g 3
+  hf mf setuid -u 11223344556677 -g 3
+  hf mf setuid -u 11223344556677 --blk0 11223344556677084400120111003912 -g 3
   hf mf setuid --blk0 1122334444080400aabbccddeeff1122 -g 4 --pwd 00000000
 """
         return parser
@@ -1407,13 +1408,13 @@ def get_block0(self, uid, args):
                 print(f"{CR}Block0 needs to be 16 bytes{C0}")
                 return
 
-            uid = str_to_bytes(block0[0:8])
-            bcc = 0
-            bcc = uid[0] ^ uid[1] ^ uid[2] ^ uid[3]
-            # check if bcc is valid on the block0
-            if block0[8:10] != format(bcc, "02x"):
-                print(f"{CR}Invalid BCC{C0}")
-                return
+            if not (block0[16:20].lower() == "4400" or block0[16:20].lower() == "4200"):
+                uid = str_to_bytes(block0[0:8])
+                bcc = uid[0] ^ uid[1] ^ uid[2] ^ uid[3]
+                # check if bcc is valid on the block0
+                if block0[8:10] != format(bcc, "02x"):
+                    print(f"{CR}Invalid BCC{C0}")
+                    return
         return str_to_bytes(block0)
 
     def gen1a_set_block0(self, block0: bytes):
@@ -1480,6 +1481,7 @@ def gen3_set_block0(self, uid: bytes, block0: bytes, lock: bool = False):
         if not isGen3:
             print(f"{CR}Tag is not Gen3{C0}")
             return
+        print("Found Gen3 Tag")
         resp1 = self.cmd.setGen3Uid(uid)
         print(
             f"Set UID to {uid.hex().upper()}: {CG}Success{C0}"

script/pn532_cmd.py

@@ -342,6 +342,10 @@ def isGen3(self):
         return False
 
     def setGen3Uid(self, uid: bytes):
+        selected_tag = self.selectTag()
+        if selected_tag is None:
+            print(f"{CR}Select tag failed{C0}")
+            return
         options = {
             "activate_rf_field": 0,
             "wait_response": 1,
@@ -352,7 +356,7 @@ def setGen3Uid(self, uid: bytes):
         }
         command = "90FBCCCC07" + uid.hex()
         resp = self.hf14a_raw(
-            options=options, resp_timeout_ms=1000, data=bytes.fromhex(command)
+            options=options, resp_timeout_ms=2000, data=bytes.fromhex(command)
         )
         if resp[0] == 0x00:
             return True