我们正在一个项目中，我们必须将RFID卡中的数据克隆到新的干净RFID卡上。通过使用MiIFARE Classic Tool，我们发现我们的密钥是：
第0部分：A0A1A2A3A4A5
其余部分：FFFFFFFFFFFF
我们正在使用Arduino MEGA 2560和RFID-rc522，并在Arduino上使用名为 RFID-Cloner 的库来实现我们的愿望。
第一次尝试，我们一直收到消息 PCD_Authenticate（）失败：通信超时。，我们认为这很奇怪，因为同时存储和使用了所需的两个密钥。然后我们怀疑只使用了存储的第一个密钥，并且当我们删除第一个密钥（默认密钥）时，我们解密了第0节，最终可以看到一些数据。然后出现了一个新问题。
byte knownKeys[NR_KNOWN_KEYS][MFRC522::MF_KEY_SIZE] = {
{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, // FF FF FF FF FF FF = factory default
{0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5}, // A0 A1 A2 A3 A4 A5
{0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5}, // B0 B1 B2 B3 B4 B5
{0x4d, 0x3a, 0x99, 0xc3, 0x51, 0xdd}, // 4D 3A 99 C3 51 DD
{0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a}, // 1A 98 2C 7E 45 9A
{0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7}, // D3 F7 D3 F7 D3 F7
{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}, // AA BB CC DD EE FF
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00} // 00 00 00 00 00 00
};
第0节使用此密钥： A0A1A2A3A4A5 解密，但不幸的是，解密其余部分时再次使用此密钥，这需要密钥： FFFFFFFFFFFF 。因此，我们有一个愚蠢的问题...
问题是：如何用一个密钥解密第0部分，而用另一密钥解密其余部分？
毫无疑问，最佳解决方案是尝试使用存储的每个密钥来解密每个部分
代码
/*
Copy the RFID card data into variables and then
scan the second empty card to copy all the data
----------------------------------------------------------------------------
Example sketch/program which will try the most used default keys listed in
https://code.google.com/p/mfcuk/wiki/MifareClassicDefaultKeys to dump the
block 0 of a MIFARE RFID card using a RFID-RC522 reader.
Typical pin layout used:
-----------------------------------------------------------------------------------------
MFRC522 Arduino Arduino Arduino Arduino Arduino
Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
Signal Pin Pin Pin Pin Pin Pin
-----------------------------------------------------------------------------------------
RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
SPI SS SDA(SS) 10 53 D10 10 10
SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
*/
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 5 // Configurable, see typical pin layout above
#define SS_PIN 53 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
byte buffer[18];
byte block;
byte waarde[64][16];
MFRC522::StatusCode status;
MFRC522::MIFARE_Key key;
// Number of known default keys (hard-coded)
// NOTE: Synchronize the NR_KNOWN_KEYS define with the defaultKeys[] array
#define NR_KNOWN_KEYS 8
// Known keys, see: https://code.google.com/p/mfcuk/wiki/MifareClassicDefaultKeys
byte knownKeys[NR_KNOWN_KEYS][MFRC522::MF_KEY_SIZE] = {
{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, // FF FF FF FF FF FF = factory default
{0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5}, // A0 A1 A2 A3 A4 A5
{0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5}, // B0 B1 B2 B3 B4 B5
{0x4d, 0x3a, 0x99, 0xc3, 0x51, 0xdd}, // 4D 3A 99 C3 51 DD
{0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a}, // 1A 98 2C 7E 45 9A
{0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7}, // D3 F7 D3 F7 D3 F7
{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}, // AA BB CC DD EE FF
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00} // 00 00 00 00 00 00
};
char choice;
/*
Initialize.
*/
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522 card
Serial.println(F("Try the most used default keys to print block 0 to 63 of a MIFARE PICC."));
Serial.println("1.Read card \n2.Write to card \n3.Copy the data.");
for (byte i = 0; i < 6; i++) {
key.keyByte[i] = 0xFF;
}
}
//Via seriele monitor de bytes uitlezen in hexadecimaal
void dump_byte_array(byte *buffer, byte bufferSize) {
for (byte i = 0; i < bufferSize; i++) {
Serial.print(buffer[i] < 0x10 ? " 0" : " ");
Serial.print(buffer[i], HEX);
}
}
//Via seriele monitor de bytes uitlezen in ASCI
void dump_byte_array1(byte *buffer, byte bufferSize) {
for (byte i = 0; i < bufferSize; i++) {
Serial.print(buffer[i] < 0x10 ? " 0" : " ");
Serial.write(buffer[i]);
}
}
/*
Try using the PICC (the tag/card) with the given key to access block 0 to 63.
On success, it will show the key details, and dump the block data on Serial.
@return true when the given key worked, false otherwise.
*/
bool try_key(MFRC522::MIFARE_Key *key)
{
bool result = false;
for (byte block = 0; block < 64; block++) {
// Serial.println(F("Authenticating using key A..."));
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, key, &(mfrc522.uid));
if (status != MFRC522::STATUS_OK) {
Serial.print(F("PCD_Authenticate() failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return false;
}
// Read block
byte byteCount = sizeof(buffer);
status = mfrc522.MIFARE_Read(block, buffer, &byteCount);
if (status != MFRC522::STATUS_OK) {
Serial.print(F("MIFARE_Read() failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
}
else {
// Successful read
result = true;
Serial.print(F("Success with key:"));
dump_byte_array((*key).keyByte, MFRC522::MF_KEY_SIZE);
Serial.println();
// Dump block data
Serial.print(F("Block ")); Serial.print(block); Serial.print(F(":"));
dump_byte_array1(buffer, 16); //omzetten van hex naar ASCI
Serial.println();
for (int p = 0; p < 16; p++) //De 16 bits uit de block uitlezen
{
waarde [block][p] = buffer[p];
Serial.print(waarde[block][p]);
Serial.print(" ");
}
}
}
Serial.println();
Serial.println("1.Read card \n2.Write to card \n3.Copy the data.");
mfrc522.PICC_HaltA(); // Halt PICC
mfrc522.PCD_StopCrypto1(); // Stop encryption on PCD
return result;
start();
}
/*
Main loop.
*/
void loop() {
start();
}
void start() {
choice = Serial.read();
if (choice == '1')
{
Serial.println("Read the card");
keuze1();
}
}
void keuze1() { //Read card
Serial.println("Insert card...");
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
return;
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
return;
// Show some details of the PICC (that is: the tag/card)
Serial.print(F("Card UID:"));
dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
Serial.println();
Serial.print(F("PICC type: "));
MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType));
// Try the known default keys
MFRC522::MIFARE_Key key;
for (byte k = 0; k < NR_KNOWN_KEYS; k++) {
// Copy the known key into the MIFARE_Key structure
for (byte i = 0; i < MFRC522::MF_KEY_SIZE; i++) {
key.keyByte[i] = knownKeys[k][i];
}
// Try the key
if (try_key(&key)) {
// Found and reported on the key and block,
// no need to try other keys for this PICC
break;
}
}
}