mirror of
https://github.com/Proxmark/proxmark3.git
synced 2024-11-11 09:59:45 +08:00
266 lines
6.8 KiB
C
266 lines
6.8 KiB
C
//-----------------------------------------------------------------------------
|
|
// Merlok, May 2011
|
|
// Many authors, that makes 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.
|
|
//-----------------------------------------------------------------------------
|
|
// code for work with mifare cards.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "proxmark3.h"
|
|
#include "apps.h"
|
|
#include "util.h"
|
|
#include "string.h"
|
|
|
|
#include "iso14443crc.h"
|
|
#include "iso14443a.h"
|
|
#include "crapto1.h"
|
|
#include "mifareutil.h"
|
|
|
|
uint8_t* mifare_get_bigbufptr(void) {
|
|
return (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes
|
|
}
|
|
|
|
int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer)
|
|
{
|
|
return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL);
|
|
}
|
|
|
|
int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint32_t * parptr)
|
|
{
|
|
uint8_t dcmd[4], ecmd[4];
|
|
uint32_t pos, par, res;
|
|
|
|
dcmd[0] = cmd;
|
|
dcmd[1] = data;
|
|
AppendCrc14443a(dcmd, 2);
|
|
|
|
memcpy(ecmd, dcmd, sizeof(dcmd));
|
|
|
|
if (crypted) {
|
|
par = 0;
|
|
for (pos = 0; pos < 4; pos++)
|
|
{
|
|
ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];
|
|
par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );
|
|
}
|
|
|
|
ReaderTransmitPar(ecmd, sizeof(ecmd), par);
|
|
|
|
} else {
|
|
ReaderTransmit(dcmd, sizeof(dcmd));
|
|
}
|
|
|
|
int len = ReaderReceivePar(answer, &par);
|
|
|
|
if (parptr) *parptr = par;
|
|
|
|
if (crypted == CRYPT_ALL) {
|
|
if (len == 1) {
|
|
res = 0;
|
|
for (pos = 0; pos < 4; pos++)
|
|
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;
|
|
|
|
answer[0] = res;
|
|
|
|
} else {
|
|
for (pos = 0; pos < len; pos++)
|
|
{
|
|
answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];
|
|
}
|
|
}
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested)
|
|
{
|
|
return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL);
|
|
}
|
|
|
|
int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested, uint32_t * ntptr)
|
|
{
|
|
// variables
|
|
int len;
|
|
uint32_t pos;
|
|
uint8_t tmp4[4];
|
|
byte_t par = 0;
|
|
byte_t ar[4];
|
|
uint32_t nt, ntpp; // Supplied tag nonce
|
|
|
|
uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
|
|
uint8_t* receivedAnswer = mifare_get_bigbufptr();
|
|
|
|
// Transmit MIFARE_CLASSIC_AUTH
|
|
len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);
|
|
// Dbprintf("rand nonce len: %x", len);
|
|
if (len != 4) return 1;
|
|
|
|
ar[0] = 0x55;
|
|
ar[1] = 0x41;
|
|
ar[2] = 0x49;
|
|
ar[3] = 0x92;
|
|
|
|
// Save the tag nonce (nt)
|
|
nt = bytes_to_num(receivedAnswer, 4);
|
|
|
|
// ----------------------------- crypto1 create
|
|
if (isNested)
|
|
crypto1_destroy(pcs);
|
|
|
|
// Init cipher with key
|
|
crypto1_create(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)
|
|
Dbprintf("auth uid: %08x nt: %08x", uid, nt);
|
|
|
|
// save Nt
|
|
if (ntptr)
|
|
*ntptr = nt;
|
|
|
|
par = 0;
|
|
// Generate (encrypted) nr+parity by loading it into the cipher (Nr)
|
|
for (pos = 0; pos < 4; pos++)
|
|
{
|
|
mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];
|
|
par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );
|
|
}
|
|
|
|
// 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 = (par >> 1)| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );
|
|
}
|
|
|
|
// Transmit reader nonce and reader answer
|
|
ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);
|
|
|
|
// Receive 4 bit answer
|
|
len = ReaderReceive(receivedAnswer);
|
|
if (!len)
|
|
{
|
|
Dbprintf("Authentication failed. Card timeout.");
|
|
return 2;
|
|
}
|
|
|
|
memcpy(tmp4, receivedAnswer, 4);
|
|
ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
|
|
|
|
if (ntpp != bytes_to_num(tmp4, 4)) {
|
|
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)
|
|
{
|
|
// variables
|
|
int len;
|
|
uint8_t bt[2];
|
|
|
|
uint8_t* receivedAnswer = mifare_get_bigbufptr();
|
|
|
|
// command MIFARE_CLASSIC_READBLOCK
|
|
len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);
|
|
if (len == 1) {
|
|
Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
|
|
return 1;
|
|
}
|
|
if (len != 18) {
|
|
Dbprintf("Cmd Error: card timeout. len: %x", len);
|
|
return 2;
|
|
}
|
|
|
|
memcpy(bt, receivedAnswer + 16, 2);
|
|
AppendCrc14443a(receivedAnswer, 16);
|
|
if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
|
|
Dbprintf("Cmd CRC response error.");
|
|
return 3;
|
|
}
|
|
|
|
memcpy(blockData, receivedAnswer, 16);
|
|
return 0;
|
|
}
|
|
|
|
int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
|
|
{
|
|
// variables
|
|
int len, i;
|
|
uint32_t pos;
|
|
uint32_t par = 0;
|
|
byte_t res;
|
|
|
|
uint8_t d_block[18], d_block_enc[18];
|
|
uint8_t* receivedAnswer = mifare_get_bigbufptr();
|
|
|
|
// command MIFARE_CLASSIC_WRITEBLOCK
|
|
len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);
|
|
|
|
if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
|
|
Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
|
|
return 1;
|
|
}
|
|
|
|
memcpy(d_block, blockData, 16);
|
|
AppendCrc14443a(d_block, 16);
|
|
|
|
// crypto
|
|
par = 0;
|
|
for (pos = 0; pos < 18; pos++)
|
|
{
|
|
d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
|
|
par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );
|
|
}
|
|
|
|
ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);
|
|
|
|
// Receive the response
|
|
len = ReaderReceive(receivedAnswer);
|
|
|
|
res = 0;
|
|
for (i = 0; i < 4; i++)
|
|
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
|
|
|
|
if ((len != 1) || (res != 0x0A)) {
|
|
Dbprintf("Cmd send data2 Error: %02x", res);
|
|
return 2;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
|
|
{
|
|
// variables
|
|
int len;
|
|
|
|
// Mifare HALT
|
|
uint8_t* receivedAnswer = mifare_get_bigbufptr();
|
|
|
|
len = mifare_sendcmd_short(pcs, 1, 0x50, 0x00, receivedAnswer);
|
|
if (len != 0) {
|
|
Dbprintf("halt error. response len: %x", len);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|