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fiddling with mfu

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This commit is contained in:
iceman1001 2020-11-05 12:06:12 +01:00
commit 928a4f789e
3 changed files with 23 additions and 11 deletions
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3
armsrc/appmain.c
View file

@ -1503,9 +1503,10 @@ static void PacketReceived(PacketCommandNG *packet) {
struct p {
uint8_t counter;
uint32_t tearoff_time;
uint8_t value[4];
} PACKED;
struct p *payload = (struct p *) packet->data.asBytes;
MifareU_Counter_Tearoff(payload->counter, payload->tearoff_time);
MifareU_Counter_Tearoff(payload->counter, payload->tearoff_time, payload->value);
break;
}
case CMD_HF_MIFARE_STATIC_NONCE: {

29
armsrc/mifarecmd.c
View file

@ -450,7 +450,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain) {
// 2 = use 0x1B authentication.
// datain : 4 first bytes is data to be written.
// : 4/16 next bytes is authentication key.
void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain) {
static void MifareUWriteBlockEx(uint8_t arg0, uint8_t arg1, uint8_t *datain, bool reply) {
uint8_t blockNo = arg0;
bool useKey = (arg1 == 1); //UL_C
bool usePwd = (arg1 == 2); //UL_EV1/NTAG
@ -507,12 +507,17 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain) {
if (DBGLEVEL >= 2) DbpString("WRITE BLOCK FINISHED");
reply_mix(CMD_ACK, 1, 0, 0, 0, 0);
if (reply)
reply_mix(CMD_ACK, 1, 0, 0, 0, 0);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
set_tracing(false);
}
void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain) {
MifareUWriteBlockEx(arg0, arg1, datain, true);
}
// Arg0 : Block to write to.
// Arg1 : 0 = use no authentication.
// 1 = use 0x1A authentication.
@ -2720,7 +2725,8 @@ void MifareU_Otp_Tearoff(uint8_t arg0, uint32_t tearoff_time, uint8_t *datain) {
if (tearoff_time > 43000)
tearoff_time = 43000;
MifareUWriteBlock(blockNo, 0, data_fullwrite);
MifareUWriteBlockEx(blockNo, 0, data_fullwrite, false);
LEDsoff();
iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
@ -2729,13 +2735,18 @@ void MifareU_Otp_Tearoff(uint8_t arg0, uint32_t tearoff_time, uint8_t *datain) {
// write cmd to send, include CRC
// 1b write, 1b block, 4b data, 2 crc
uint8_t cmd[] = {MIFARE_ULC_WRITE, blockNo, data_testwrite[0], data_testwrite[1], data_testwrite[2], data_testwrite[3], 0, 0};
uint8_t cmd[] = {
MIFARE_ULC_WRITE, blockNo,
data_testwrite[0], data_testwrite[1], data_testwrite[2], data_testwrite[3],
0, 0
};
AddCrc14A(cmd, sizeof(cmd) - 2);
// anticollision / select card
if (!iso14443a_select_card(NULL, NULL, NULL, true, 0, true)) {
if (DBGLEVEL >= DBG_ERROR) Dbprintf("Can't select card");
OnError(1);
reply_ng(CMD_HF_MFU_OTP_TEAROFF, PM3_EFAILED, NULL, 0);
return;
};
// send
@ -2753,7 +2764,7 @@ void MifareU_Otp_Tearoff(uint8_t arg0, uint32_t tearoff_time, uint8_t *datain) {
//
// Tear-off attack against MFU counter
void MifareU_Counter_Tearoff(uint8_t counter, uint32_t tearoff_time) {
void MifareU_Counter_Tearoff(uint8_t counter, uint32_t tearoff_time, uint8_t *datain) {
if (tearoff_time > 43000)
tearoff_time = 43000;
@ -2767,10 +2778,10 @@ void MifareU_Counter_Tearoff(uint8_t counter, uint32_t tearoff_time) {
uint8_t cmd[] = {
MIFARE_ULEV1_INCR_CNT,
counter,
0, // lsb
0,
0, // msb
0, // rfu
datain[0], // lsb
datain[1],
datain[2], // msb
datain[3], // rfu
0,
0,
};

2
armsrc/mifarecmd.h
View file

@ -64,5 +64,5 @@ void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain);
// Tear-off test for MFU
void MifareU_Otp_Tearoff(uint8_t arg0, uint32_t arg1, uint8_t *datain);
void MifareU_Counter_Tearoff(uint8_t counter, uint32_t tearoff_time);
void MifareU_Counter_Tearoff(uint8_t counter, uint32_t tearoff_time, uint8_t *datain);
#endif