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proxmark3/armsrc/mifareutil.c
Philippe Teuwen 5b54385347 rename globals
2021-08-21 23:08:26 +02:00

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// Merlok, May 2011, 2012
// Many authors, whom made it possible
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Work with mifare cards.
//-----------------------------------------------------------------------------
#include "mifareutil.h"
#include "string.h"
#include "BigBuf.h"
#include "iso14443a.h"
#include "ticks.h"
#include "dbprint.h"
#include "parity.h"
#include "commonutil.h"
#include "crc16.h"
#include "protocols.h"
#include "desfire_crypto.h"
// crypto1 helpers
void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out) {
if (len != 1) {
for (int i = 0; i < len; i++)
data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
} else {
uint8_t bt = 0;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], 0)) << 0;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], 1)) << 1;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], 2)) << 2;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], 3)) << 3;
data_out[0] = bt;
}
return;
}
void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len) {
mf_crypto1_decryptEx(pcs, data, len, data);
}
void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
mf_crypto1_encryptEx(pcs, data, NULL, data, len, par);
}
void mf_crypto1_encryptEx(struct Crypto1State *pcs, uint8_t *data_in, uint8_t *keystream, uint8_t *data_out, uint16_t len, uint8_t *par) {
int i;
par[0] = 0;
for (i = 0; i < len; i++) {
uint8_t bt = data_in[i];
data_out[i] = crypto1_byte(pcs, keystream ? keystream[i] : 0x00, 0) ^ data_in[i];
if ((i & 0x0007) == 0)
par[ i >> 3 ] = 0;
par[ i >> 3 ] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01) << (7 - (i & 0x0007)));
}
}
uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
uint8_t bt = 0;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 0)) << 0;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 1)) << 1;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 2)) << 2;
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, 3)) << 3;
return bt;
}
// send X byte basic commands
int mifare_sendcmd(uint8_t cmd, uint8_t *data, uint8_t data_size, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing) {
uint8_t dcmd[data_size + 3];
dcmd[0] = cmd;
if (data_size > 0)
memcpy(dcmd + 1, data, data_size);
AddCrc14A(dcmd, data_size + 1);
ReaderTransmit(dcmd, sizeof(dcmd), timing);
int len = ReaderReceive(answer, answer_parity);
if (!len) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("%02X Cmd failed. Card timeout.", cmd);
len = ReaderReceive(answer, answer_parity);
}
return len;
}
// send 2 byte commands
int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing) {
uint16_t pos;
uint8_t dcmd[4] = {cmd, data, 0x00, 0x00};
uint8_t ecmd[4] = {0x00, 0x00, 0x00, 0x00};
uint8_t par[1] = {0x00}; // 1 Byte parity is enough here
AddCrc14A(dcmd, 2);
memcpy(ecmd, dcmd, sizeof(dcmd));
if (pcs && crypted) {
par[0] = 0;
for (pos = 0; pos < 4; pos++) {
ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7 - pos));
}
ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);
} else {
ReaderTransmit(dcmd, sizeof(dcmd), timing);
}
int len = ReaderReceive(answer, par);
if (answer_parity) *answer_parity = par[0];
if (crypted == CRYPT_ALL) {
if (len == 1) {
uint16_t res = 0;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 0)) << 0;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 1)) << 1;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 2)) << 2;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], 3)) << 3;
answer[0] = res;
} else {
for (pos = 0; pos < len; pos++)
answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
}
}
return len;
}
// mifare classic commands
int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested) {
return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);
}
int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing) {
int len;
uint32_t pos, nt, ntpp; // Supplied tag nonce
uint8_t par[1] = {0x00};
uint8_t nr[4];
uint8_t mf_nr_ar[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
// "random" reader nonce:
num_to_bytes(prng_successor(GetTickCount(), 32), 4, nr);
// Transmit MIFARE_CLASSIC_AUTH
len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
if (len != 4) return 1;
// Save the tag nonce (nt)
nt = bytes_to_num(receivedAnswer, 4);
// ----------------------------- crypto1 create
if (isNested)
crypto1_deinit(pcs);
// Init cipher with key
crypto1_init(pcs, ui64Key);
if (isNested == AUTH_NESTED) {
// decrypt nt with help of new key
nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
} else {
// Load (plain) uid^nt into the cipher
crypto1_word(pcs, nt ^ uid, 0);
}
// some statistic
if (!ntptr && (g_dbglevel >= DBG_EXTENDED))
Dbprintf("auth uid: %08x | nr: %08x | nt: %08x", uid, nr, nt);
// save Nt
if (ntptr)
*ntptr = nt;
// Generate (encrypted) nr+parity by loading it into the cipher (Nr)
par[0] = 0;
for (pos = 0; pos < 4; pos++) {
mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7 - pos));
}
// Skip 32 bits in pseudo random generator
nt = prng_successor(nt, 32);
// ar+parity
for (pos = 4; pos < 8; pos++) {
nt = prng_successor(nt, 8);
mf_nr_ar[pos] = crypto1_byte(pcs, 0x00, 0) ^ (nt & 0xff);
par[0] |= (((filter(pcs->odd) ^ oddparity8(nt & 0xff)) & 0x01) << (7 - pos));
}
// Transmit reader nonce and reader answer
ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
// save standard timeout
uint32_t save_timeout = iso14a_get_timeout();
// set timeout for authentication response
if (save_timeout > 103)
iso14a_set_timeout(103);
// Receive 4 byte tag answer
len = ReaderReceive(receivedAnswer, receivedAnswerPar);
iso14a_set_timeout(save_timeout);
if (!len) {
if (g_dbglevel >= DBG_EXTENDED) Dbprintf("Authentication failed. Card timeout");
return 2;
}
ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0, 0);
if (ntpp != bytes_to_num(receivedAnswer, 4)) {
if (g_dbglevel >= DBG_EXTENDED) Dbprintf("Authentication failed. Error card response");
return 3;
}
return 0;
}
int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
int len;
uint8_t bt[2] = {0x00, 0x00};
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
len = mifare_sendcmd_short(pcs, 1, ISO14443A_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
if (len == 1) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error %02x", receivedAnswer[0]);
return 1;
}
if (len != 18) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("wrong response len %d (expected 18)", len);
return 2;
}
memcpy(bt, receivedAnswer + 16, 2);
AddCrc14A(receivedAnswer, 16);
if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
if (g_dbglevel >= DBG_INFO) Dbprintf("CRC response error");
return 3;
}
memcpy(blockData, receivedAnswer, 16);
return 0;
}
// mifare ultralight commands
int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack) {
uint16_t len = 0;
uint8_t resp[4] = {0x00, 0x00, 0x00, 0x00};
uint8_t respPar[1] = {0x00};
uint8_t key[4] = {0x00, 0x00, 0x00, 0x00};
memcpy(key, keybytes, 4);
if (g_dbglevel >= DBG_EXTENDED)
Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]);
len = mifare_sendcmd(MIFARE_ULEV1_AUTH, key, sizeof(key), resp, respPar, NULL);
if (len != 4) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
return 0;
}
if (g_dbglevel >= DBG_EXTENDED)
Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0], resp[1], resp[2], resp[3]);
memcpy(pack, resp, 4);
return 1;
}
int mifare_ultra_auth(uint8_t *keybytes) {
/// 3des2k
uint8_t random_a[8] = {1, 1, 1, 1, 1, 1, 1, 1};
uint8_t random_b[8] = {0x00};
uint8_t enc_random_b[8] = {0x00};
uint8_t rnd_ab[16] = {0x00};
uint8_t IV[8] = {0x00};
uint8_t key[16] = {0x00};
memcpy(key, keybytes, 16);
uint16_t len = 0;
uint8_t resp[19] = {0x00};
uint8_t respPar[3] = {0, 0, 0};
// REQUEST AUTHENTICATION
len = mifare_sendcmd_short(NULL, CRYPT_NONE, MIFARE_ULC_AUTH_1, 0x00, resp, respPar, NULL);
if (len != 11) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
return 0;
}
// tag nonce.
memcpy(enc_random_b, resp + 1, 8);
// decrypt nonce.
tdes_nxp_receive((void *)enc_random_b, (void *)random_b, sizeof(random_b), (const void *)key, IV, 2);
rol(random_b, 8);
memcpy(rnd_ab, random_a, 8);
memcpy(rnd_ab + 8, random_b, 8);
if (g_dbglevel >= DBG_EXTENDED) {
Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
enc_random_b[0], enc_random_b[1], enc_random_b[2], enc_random_b[3], enc_random_b[4], enc_random_b[5], enc_random_b[6], enc_random_b[7]);
Dbprintf(" B: %02x %02x %02x %02x %02x %02x %02x %02x",
random_b[0], random_b[1], random_b[2], random_b[3], random_b[4], random_b[5], random_b[6], random_b[7]);
Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
rnd_ab[0], rnd_ab[1], rnd_ab[2], rnd_ab[3], rnd_ab[4], rnd_ab[5], rnd_ab[6], rnd_ab[7]);
Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
rnd_ab[8], rnd_ab[9], rnd_ab[10], rnd_ab[11], rnd_ab[12], rnd_ab[13], rnd_ab[14], rnd_ab[15]);
}
// encrypt out, in, length, key, iv
tdes_nxp_send(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b, 2);
len = mifare_sendcmd(MIFARE_ULC_AUTH_2, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
if (len != 11) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
return 0;
}
uint8_t enc_resp[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t resp_random_a[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
memcpy(enc_resp, resp + 1, 8);
// decrypt out, in, length, key, iv
tdes_nxp_receive(enc_resp, resp_random_a, 8, key, enc_random_b, 2);
if (memcmp(resp_random_a, random_a, 8) != 0) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("failed authentication");
return 0;
}
if (g_dbglevel >= DBG_EXTENDED) {
Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
rnd_ab[0], rnd_ab[1], rnd_ab[2], rnd_ab[3],
rnd_ab[4], rnd_ab[5], rnd_ab[6], rnd_ab[7]);
Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
rnd_ab[8], rnd_ab[9], rnd_ab[10], rnd_ab[11],
rnd_ab[12], rnd_ab[13], rnd_ab[14], rnd_ab[15]);
Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
random_a[0], random_a[1], random_a[2], random_a[3],
random_a[4], random_a[5], random_a[6], random_a[7]);
Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
resp_random_a[0], resp_random_a[1], resp_random_a[2], resp_random_a[3],
resp_random_a[4], resp_random_a[5], resp_random_a[6], resp_random_a[7]);
}
return 1;
}
static int mifare_ultra_readblockEx(uint8_t blockNo, uint8_t *blockData) {
uint16_t len = 0;
uint8_t bt[2] = {0x00, 0x00};
uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
len = mifare_sendcmd_short(NULL, CRYPT_NONE, ISO14443A_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
if (len == 1) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
return 1;
}
if (len != 18) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len);
return 2;
}
memcpy(bt, receivedAnswer + 16, 2);
AddCrc14A(receivedAnswer, 16);
if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd CRC response error.");
return 3;
}
memcpy(blockData, receivedAnswer, 16);
return 0;
}
int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) {
#define MFU_MAX_RETRIES 5
uint8_t res;
for (uint8_t retries = 0; retries < MFU_MAX_RETRIES; ++retries) {
res = mifare_ultra_readblockEx(blockNo, blockData);
// break if OK, or NACK.
switch (res) {
case 0:
case 1:
return res;
default:
continue;
}
}
return res;
}
int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) {
// variables
uint16_t len = 0;
uint32_t pos = 0;
uint8_t par[3] = {0x00, 0x00, 0x00}; // enough for 18 Bytes to send
uint8_t res = 0;
uint8_t d_block[18], d_block_enc[18];
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
// command MIFARE_CLASSIC_WRITEBLOCK
len = mifare_sendcmd_short(pcs, 1, ISO14443A_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
return 1;
}
memcpy(d_block, blockData, 16);
AddCrc14A(d_block, 16);
// crypto
for (pos = 0; pos < 18; pos++) {
d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
par[pos >> 3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos & 0x0007)));
}
ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);
// Receive the response
len = ReaderReceive(receivedAnswer, receivedAnswerPar);
res = 0;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 0)) << 0;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 1)) << 1;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 2)) << 2;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 3)) << 3;
if ((len != 1) || (res != 0x0A)) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Cmd send data2 Error: %02x", res);
return 2;
}
return 0;
}
int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData) {
// variables
uint16_t len = 0;
uint8_t d_block[18];
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
len = mifare_sendcmd_short(NULL, CRYPT_NONE, ISO14443A_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL);
if (receivedAnswer[0] != 0x0A) { // 0x0a - ACK
if (g_dbglevel >= DBG_ERROR)
Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0], len);
return 1;
}
memcpy(d_block, blockData, 16);
AddCrc14A(d_block, 16);
ReaderTransmit(d_block, sizeof(d_block), NULL);
// Receive the response
len = ReaderReceive(receivedAnswer, receivedAnswerPar);
if (receivedAnswer[0] != 0x0A) { // 0x0a - ACK
if (g_dbglevel >= DBG_ERROR)
Dbprintf("Cmd Send Data Error: %02x %d", receivedAnswer[0], len);
return 2;
}
return 0;
}
int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData) {
uint16_t len = 0;
uint8_t block[5] = {blockNo, 0x00, 0x00, 0x00, 0x00 };
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
// command MIFARE_CLASSIC_WRITEBLOCK
memcpy(block + 1, blockData, 4);
len = mifare_sendcmd(MIFARE_ULC_WRITE, block, sizeof(block), receivedAnswer, receivedAnswerPar, NULL);
if (receivedAnswer[0] != 0x0A) { // 0x0a - ACK
if (g_dbglevel >= DBG_ERROR)
Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0], len);
return 1;
}
return 0;
}
int mifare_classic_halt_ex(struct Crypto1State *pcs) {
uint8_t receivedAnswer[4] = {0x00, 0x00, 0x00, 0x00};
uint16_t len = mifare_sendcmd_short(pcs, (pcs == NULL) ? CRYPT_NONE : CRYPT_ALL, ISO14443A_CMD_HALT, 0x00, receivedAnswer, NULL, NULL);
if (len != 0) {
if (g_dbglevel >= DBG_EXTENDED) Dbprintf("halt warning. response len: %x", len);
return 1;
}
return 0;
}
int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) {
return mifare_classic_halt_ex(pcs);
}
int mifare_ultra_halt(void) {
uint16_t len = 0;
uint8_t receivedAnswer[4] = {0x00, 0x00, 0x00, 0x00};
len = mifare_sendcmd_short(NULL, CRYPT_NONE, ISO14443A_CMD_HALT, 0x00, receivedAnswer, NULL, NULL);
if (len != 0) {
if (g_dbglevel >= DBG_EXTENDED) Dbprintf("halt warning. response len: %x", len);
return 1;
}
return 0;
}
// Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),
// plus evtl. 8 sectors with 16 blocks each (4k cards)
uint8_t NumBlocksPerSector(uint8_t sectorNo) {
return (sectorNo < 32) ? 4 : 16;
}
uint8_t FirstBlockOfSector(uint8_t sectorNo) {
if (sectorNo < 32)
return sectorNo * 4;
else
return 32 * 4 + (sectorNo - 32) * 16;
}
// work with emulator memory
void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
emlSetMem_xt(data, blockNum, blocksCount, 16);
}
void emlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {
uint8_t *emCARD = BigBuf_get_EM_addr();
memcpy(emCARD + blockNum * blockBtWidth, data, blocksCount * blockBtWidth);
}
void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {
uint8_t *emCARD = BigBuf_get_EM_addr();
memcpy(data, emCARD + blockNum * 16, blocksCount * 16);
}
void emlGetMemBt(uint8_t *data, int offset, int byteCount) {
uint8_t *emCARD = BigBuf_get_EM_addr();
memcpy(data, emCARD + offset, byteCount);
}
int emlCheckValBl(int blockNum) {
uint8_t *emCARD = BigBuf_get_EM_addr();
uint8_t *data = emCARD + blockNum * 16;
if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||
(data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||
(data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||
(data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||
(data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||
(data[12] != (data[15] ^ 0xff))
)
return 1;
return 0;
}
int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {
uint8_t *emCARD = BigBuf_get_EM_addr();
uint8_t *data = emCARD + blockNum * 16;
if (emlCheckValBl(blockNum))
return 1;
memcpy(blReg, data, 4);
*blBlock = data[12];
return 0;
}
int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
uint8_t *emCARD = BigBuf_get_EM_addr();
uint8_t *data = emCARD + blockNum * 16;
memcpy(data + 0, &blReg, 4);
memcpy(data + 8, &blReg, 4);
blReg = blReg ^ 0xffffffff;
memcpy(data + 4, &blReg, 4);
data[12] = blBlock;
data[13] = blBlock ^ 0xff;
data[14] = blBlock;
data[15] = blBlock ^ 0xff;
return 0;
}
uint64_t emlGetKey(int sectorNum, int keyType) {
uint8_t key[6] = {0x00};
uint8_t *emCARD = BigBuf_get_EM_addr();
memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
return bytes_to_num(key, 6);
}
void emlClearMem(void) {
const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
const uint8_t uid[] = {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
uint8_t *emCARD = BigBuf_get_EM_addr();
memset(emCARD, 0, CARD_MEMORY_SIZE);
// fill sectors trailer data
for (uint16_t b = 3; b < MIFARE_4K_MAXBLOCK; ((b < MIFARE_2K_MAXBLOCK - 4) ? (b += 4) : (b += 16)))
emlSetMem((uint8_t *)trailer, b, 1);
// uid
emlSetMem((uint8_t *)uid, 0, 1);
return;
}
uint8_t SectorTrailer(uint8_t blockNo) {
if (blockNo <= MIFARE_2K_MAXBLOCK) {
if (g_dbglevel >= DBG_EXTENDED)
Dbprintf("Sector Trailer for block %d : %d", blockNo, (blockNo | 0x03));
return (blockNo | 0x03);
} else {
if (g_dbglevel >= DBG_EXTENDED)
Dbprintf("Sector Trailer for block %d : %d", blockNo, (blockNo | 0x0f));
return (blockNo | 0x0f);
}
}
bool IsSectorTrailer(uint8_t blockNo) {
return (blockNo == SectorTrailer(blockNo));
}
// Mifare desfire commands
int mifare_sendcmd_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t *data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing) {
uint8_t dcmd[5] = {cmd, data[0], data[1], 0x00, 0x00};
AddCrc14A(dcmd, 3);
ReaderTransmit(dcmd, sizeof(dcmd), NULL);
int len = ReaderReceive(answer, answer_parity);
if (!len) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Authentication failed. Card timeout.");
return 1;
}
return len;
}
int mifare_sendcmd_special2(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t *data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing) {
uint8_t dcmd[20] = {0x00};
dcmd[0] = cmd;
memcpy(dcmd + 1, data, 17);
AddCrc14A(dcmd, 18);
ReaderTransmit(dcmd, sizeof(dcmd), NULL);
int len = ReaderReceive(answer, answer_parity);
if (!len) {
if (g_dbglevel >= DBG_ERROR) Dbprintf("Authentication failed. Card timeout.");
return 1;
}
return len;
}
int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData) {
int len;
// load key, keynumber
uint8_t data[2] = {MFDES_AUTHENTICATE, 0x00};
uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer, receivedAnswerPar, NULL);
if (len == 1) {
if (g_dbglevel >= DBG_ERROR)
Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
return 1;
}
if (len == 12) {
if (g_dbglevel >= DBG_EXTENDED) {
Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
receivedAnswer[0], receivedAnswer[1], receivedAnswer[2], receivedAnswer[3], receivedAnswer[4],
receivedAnswer[5], receivedAnswer[6], receivedAnswer[7], receivedAnswer[8], receivedAnswer[9],
receivedAnswer[10], receivedAnswer[11]);
}
memcpy(blockData, receivedAnswer, 12);
return 0;
}
return 1;
}
int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData) {
int len;
uint8_t data[17] = {MFDES_ADDITIONAL_FRAME};
memcpy(data + 1, key, 16);
uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar, NULL);
if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) {
if (g_dbglevel >= DBG_ERROR)
Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]);
return 1;
}
if (len == 12) {
if (g_dbglevel >= DBG_EXTENDED) {
Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
receivedAnswer[0], receivedAnswer[1], receivedAnswer[2], receivedAnswer[3], receivedAnswer[4],
receivedAnswer[5], receivedAnswer[6], receivedAnswer[7], receivedAnswer[8], receivedAnswer[9],
receivedAnswer[10], receivedAnswer[11]);
}
memcpy(blockData, receivedAnswer, 12);
return 0;
}
return 1;
}
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