- //-----------------------------------------------------------------------------
+ //-----------------------------------------------------------------------------
// Merlok - June 2011, 2012
// Gerhard de Koning Gans - May 2008
// Hagen Fritsch - June 2010
//-----------------------------------------------------------------------------
// Routines to support ISO 14443 type A.
//-----------------------------------------------------------------------------
-
-#include "proxmark3.h"
-#include "apps.h"
-#include "util.h"
-#include "string.h"
-#include "cmd.h"
-#include "iso14443crc.h"
#include "iso14443a.h"
-#include "crapto1.h"
-#include "mifareutil.h"
-#include "BigBuf.h"
-#include "parity.h"
static uint32_t iso14a_timeout;
int rsamples = 0;
// the block number for the ISO14443-4 PCB
static uint8_t iso14_pcb_blocknum = 0;
+static uint8_t* free_buffer_pointer;
+
//
// ISO14443 timing:
//
}
void iso14a_set_ATS_timeout(uint8_t *ats) {
-
uint8_t tb1;
uint8_t fwi;
uint32_t fwt;
tb1 = ats[2];
fwi = (tb1 & 0xf0) >> 4; // frame waiting indicator (FWI)
- //fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc
- fwt = 4096 * (1 << fwi);
+ fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc
+ //fwt = 4096 * (1 << fwi);
- //iso14a_set_timeout(fwt/(8*16));
- iso14a_set_timeout(fwt/128);
+ iso14a_set_timeout(fwt/(8*16));
+ //iso14a_set_timeout(fwt/128);
}
}
}
// Generate the parity value for a byte sequence
//
//-----------------------------------------------------------------------------
-void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par)
-{
+void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) {
uint16_t paritybit_cnt = 0;
uint16_t paritybyte_cnt = 0;
uint8_t parityBits = 0;
}
// save remaining parity bits
- par[paritybyte_cnt] = parityBits;
-
+ par[paritybyte_cnt] = parityBits;
}
-void AppendCrc14443a(uint8_t* data, int len)
-{
+void AppendCrc14443a(uint8_t* data, int len) {
ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
}
-void AppendCrc14443b(uint8_t* data, int len)
-{
- ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
-}
-
-
//=============================================================================
// ISO 14443 Type A - Miller decoder
//=============================================================================
#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
-void UartReset()
-{
+void UartReset() {
Uart.state = STATE_UNSYNCD;
Uart.bitCount = 0;
Uart.len = 0; // number of decoded data bytes
Uart.syncBit = 9999;
}
-void UartInit(uint8_t *data, uint8_t *parity)
-{
+void UartInit(uint8_t *data, uint8_t *parity) {
Uart.output = data;
Uart.parity = parity;
Uart.fourBits = 0x00000000; // clear the buffer for 4 Bits
}
// use parameter non_real_time to provide a timestamp. Set to 0 if the decoder should measure real time
-static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time)
-{
-
+static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) {
Uart.fourBits = (Uart.fourBits << 8) | bit;
if (Uart.state == STATE_UNSYNCD) { // not yet synced
-
- Uart.syncBit = 9999; // not set
+ Uart.syncBit = 9999; // not set
// 00x11111 2|3 ticks pause followed by 6|5 ticks unmodulated Sequence Z (a "0" or "start of communication")
// 11111111 8 ticks unmodulation Sequence Y (a "0" or "end of communication" or "no information")
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0;
if (Uart.syncBit != 9999) { // found a sync bit
- Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
- Uart.startTime -= Uart.syncBit;
- Uart.endTime = Uart.startTime;
- Uart.state = STATE_START_OF_COMMUNICATION;
- }
-
+ Uart.startTime = non_real_time ? non_real_time : (GetCountSspClk() & 0xfffffff8);
+ Uart.startTime -= Uart.syncBit;
+ Uart.endTime = Uart.startTime;
+ Uart.state = STATE_START_OF_COMMUNICATION;
+ }
} else {
if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) {
}
}
}
-
}
-
return FALSE; // not finished yet, need more data
}
-
-
//=============================================================================
// ISO 14443 Type A - Manchester decoder
//=============================================================================
#define IsManchesterModulationNibble1(b) (Mod_Manchester_LUT[(b & 0x00F0) >> 4])
#define IsManchesterModulationNibble2(b) (Mod_Manchester_LUT[(b & 0x000F)])
-
-void DemodReset()
-{
+void DemodReset() {
Demod.state = DEMOD_UNSYNCD;
Demod.len = 0; // number of decoded data bytes
Demod.parityLen = 0;
Demod.twoBits = 0xffff; // buffer for 2 Bits
Demod.highCnt = 0;
Demod.startTime = 0;
- Demod.endTime = 0;
-
- //
+ Demod.endTime = 0;
Demod.bitCount = 0;
Demod.syncBit = 0xFFFF;
Demod.samples = 0;
}
-void DemodInit(uint8_t *data, uint8_t *parity)
-{
+void DemodInit(uint8_t *data, uint8_t *parity) {
Demod.output = data;
Demod.parity = parity;
DemodReset();
}
// use parameter non_real_time to provide a timestamp. Set to 0 if the decoder should measure real time
-static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non_real_time)
-{
-
+static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non_real_time) {
Demod.twoBits = (Demod.twoBits << 8) | bit;
if (Demod.state == DEMOD_UNSYNCD) {
Demod.state = DEMOD_MANCHESTER_DATA;
}
}
-
} else {
if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half
// Record the sequence of commands sent by the reader to the tag, with
// triggering so that we start recording at the point that the tag is moved
// near the reader.
+// "hf 14a sniff"
//-----------------------------------------------------------------------------
void RAMFUNC SniffIso14443a(uint8_t param) {
// param:
// Allocate memory from BigBuf for some buffers
// free all previous allocations first
- BigBuf_free();
-
- // init trace buffer
+ BigBuf_free(); BigBuf_Clear_ext(false);
clear_trace();
set_tracing(TRUE);
UartInit(receivedCmd, receivedCmdPar);
// Setup and start DMA.
- FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+ if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+ if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting");
+ return;
+ }
// We won't start recording the frames that we acquire until we trigger;
// a good trigger condition to get started is probably when we see a
DemodReset();
// And reset the Miller decoder including itS (now outdated) input buffer
UartInit(receivedCmd, receivedCmdPar);
-
LED_C_OFF();
}
TagIsActive = (Demod.state != DEMOD_UNSYNCD);
}
} // main cycle
+ if (MF_DBGLEVEL >= 1) {
+ Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
+ Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
+ }
FpgaDisableSscDma();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
-
- Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
- Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
-
set_tracing(FALSE);
}
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
-static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *parity)
-{
+static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *parity) {
ToSendReset();
// Correction bit, might be removed when not needed
ToSend[++ToSendMax] = SEC_F;
// Convert from last byte pos to length
- ToSendMax++;
+ ++ToSendMax;
}
-static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len)
-{
- uint8_t par[MAX_PARITY_SIZE];
-
+static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len) {
+ uint8_t par[MAX_PARITY_SIZE] = {0};
GetParity(cmd, len, par);
CodeIso14443aAsTagPar(cmd, len, par);
}
-
-static void Code4bitAnswerAsTag(uint8_t cmd)
-{
- int i;
+static void Code4bitAnswerAsTag(uint8_t cmd) {
+ uint8_t b = cmd;
ToSendReset();
// Send startbit
ToSend[++ToSendMax] = SEC_D;
- uint8_t b = cmd;
- for(i = 0; i < 4; i++) {
+ for(uint8_t i = 0; i < 4; i++) {
if(b & 1) {
ToSend[++ToSendMax] = SEC_D;
LastProxToAirDuration = 8 * ToSendMax - 4;
// Stop when button is pressed
// Or return TRUE when command is captured
//-----------------------------------------------------------------------------
-static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len)
-{
+static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) {
// Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
// only, since we are receiving, not transmitting).
// Signal field is off with the appropriate LED
LED_D_OFF();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
- // Now run a `software UART' on the stream of incoming samples.
+ // Now run a `software UART` on the stream of incoming samples.
UartInit(received, parity);
// clear RXRDY:
}
}
-static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSend4bitEx(uint8_t resp, bool correctionNeeded);
-int EmSend4bit(uint8_t resp);
-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par);
-int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSendCmd(uint8_t *resp, uint16_t respLen);
-int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
-bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
- uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity);
-
-static uint8_t* free_buffer_pointer;
-
-typedef struct {
- uint8_t* response;
- size_t response_n;
- uint8_t* modulation;
- size_t modulation_n;
- uint32_t ProxToAirDuration;
-} tag_response_info_t;
-
bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) {
// Example response, answer to MIFARE Classic read block will be 16 bytes + 2 CRC = 18 bytes
// This will need the following byte array for a modulation sequence
// ----------- +
// 166 bytes, since every bit that needs to be send costs us a byte
//
-
-
- // Prepare the tag modulation bits from the message
- CodeIso14443aAsTag(response_info->response,response_info->response_n);
-
- // Make sure we do not exceed the free buffer space
- if (ToSendMax > max_buffer_size) {
- Dbprintf("Out of memory, when modulating bits for tag answer:");
- Dbhexdump(response_info->response_n,response_info->response,false);
- return false;
- }
-
- // Copy the byte array, used for this modulation to the buffer position
- memcpy(response_info->modulation,ToSend,ToSendMax);
-
- // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
- response_info->modulation_n = ToSendMax;
- response_info->ProxToAirDuration = LastProxToAirDuration;
-
- return true;
-}
+ // Prepare the tag modulation bits from the message
+ CodeIso14443aAsTag(response_info->response,response_info->response_n);
+ // Make sure we do not exceed the free buffer space
+ if (ToSendMax > max_buffer_size) {
+ Dbprintf("Out of memory, when modulating bits for tag answer:");
+ Dbhexdump(response_info->response_n,response_info->response,false);
+ return FALSE;
+ }
+
+ // Copy the byte array, used for this modulation to the buffer position
+ memcpy(response_info->modulation,ToSend,ToSendMax);
+
+ // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
+ response_info->modulation_n = ToSendMax;
+ response_info->ProxToAirDuration = LastProxToAirDuration;
+ return TRUE;
+}
// "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit.
// Coded responses need one byte per bit to transfer (data, parity, start, stop, correction)
#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 453
bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
- // Retrieve and store the current buffer index
- response_info->modulation = free_buffer_pointer;
-
- // Determine the maximum size we can use from our buffer
- size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
-
- // Forward the prepare tag modulation function to the inner function
- if (prepare_tag_modulation(response_info, max_buffer_size)) {
- // Update the free buffer offset
- free_buffer_pointer += ToSendMax;
- return true;
- } else {
- return false;
- }
+ // Retrieve and store the current buffer index
+ response_info->modulation = free_buffer_pointer;
+
+ // Determine the maximum size we can use from our buffer
+ size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
+
+ // Forward the prepare tag modulation function to the inner function
+ if (prepare_tag_modulation(response_info, max_buffer_size)) {
+ // Update the free buffer offset
+ free_buffer_pointer += ToSendMax;
+ return true;
+ } else {
+ return false;
+ }
}
//-----------------------------------------------------------------------------
// Main loop of simulated tag: receive commands from reader, decide what
// response to send, and send it.
+// 'hf 14a sim'
//-----------------------------------------------------------------------------
-void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
-{
- uint32_t counters[] = {0,0,0};
- //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2
- // This can be used in a reader-only attack.
- // (it can also be retrieved via 'hf 14a list', but hey...
- uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
- uint8_t ar_nr_collected = 0;
+void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
+
+ #define ATTACK_KEY_COUNT 8 // keep same as define in cmdhfmf.c -> readerAttack()
+ // init pseudorand
+ fast_prand();
+
+ uint8_t sak = 0;
+ uint32_t cuid = 0;
+ uint32_t nonce = 0;
- uint8_t sak;
-
// PACK response to PWD AUTH for EV1/NTAG
- uint8_t response8[4] = {0,0,0,0};
+ uint8_t response8[4] = {0,0,0,0};
+ // Counter for EV1/NTAG
+ uint32_t counters[] = {0,0,0};
// The first response contains the ATQA (note: bytes are transmitted in reverse order).
- uint8_t response1[2] = {0,0};
+ uint8_t response1[] = {0,0};
+
+ // Here, we collect CUID, block1, keytype1, NT1, NR1, AR1, CUID, block2, keytyp2, NT2, NR2, AR2
+ // it should also collect block, keytype.
+ uint8_t cardAUTHSC = 0;
+ uint8_t cardAUTHKEY = 0xff; // no authentication
+ // allow collecting up to 8 sets of nonces to allow recovery of up to 8 keys
+
+ nonces_t ar_nr_nonces[ATTACK_KEY_COUNT]; // for attack types moebius
+ memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));
+ uint8_t moebius_count = 0;
switch (tagType) {
- case 1: { // MIFARE Classic
- // Says: I am Mifare 1k - original line
+ case 1: { // MIFARE Classic 1k
response1[0] = 0x04;
- response1[1] = 0x00;
sak = 0x08;
} break;
case 2: { // MIFARE Ultralight
- // Says: I am a stupid memory tag, no crypto
response1[0] = 0x44;
- response1[1] = 0x00;
sak = 0x00;
} break;
case 3: { // MIFARE DESFire
- // Says: I am a DESFire tag, ph33r me
response1[0] = 0x04;
response1[1] = 0x03;
sak = 0x20;
} break;
- case 4: { // ISO/IEC 14443-4
- // Says: I am a javacard (JCOP)
+ case 4: { // ISO/IEC 14443-4 - javacard (JCOP)
response1[0] = 0x04;
- response1[1] = 0x00;
sak = 0x28;
} break;
case 5: { // MIFARE TNP3XXX
- // Says: I am a toy
response1[0] = 0x01;
response1[1] = 0x0f;
sak = 0x01;
} break;
- case 6: { // MIFARE Mini
- // Says: I am a Mifare Mini, 320b
+ case 6: { // MIFARE Mini 320b
response1[0] = 0x44;
- response1[1] = 0x00;
sak = 0x09;
} break;
- case 7: { // NTAG?
- // Says: I am a NTAG,
+ case 7: { // NTAG
response1[0] = 0x44;
- response1[1] = 0x00;
sak = 0x00;
// PACK
response8[0] = 0x80;
uint16_t start = 4 * (0+12);
uint8_t emdata[8];
emlGetMemBt( emdata, start, sizeof(emdata));
- memcpy(data, emdata, 3); //uid bytes 0-2
- memcpy(data+3, emdata+4, 4); //uid bytes 3-7
+ memcpy(data, emdata, 3); // uid bytes 0-2
+ memcpy(data+3, emdata+4, 4); // uid bytes 3-7
flags |= FLAG_7B_UID_IN_DATA;
}
- } break;
+ } break;
+ case 8: { // MIFARE Classic 4k
+ response1[0] = 0x02;
+ sak = 0x18;
+ } break;
default: {
Dbprintf("Error: unkown tagtype (%d)",tagType);
return;
// The second response contains the (mandatory) first 24 bits of the UID
uint8_t response2[5] = {0x00};
- // Check if the uid uses the (optional) part
+ // For UID size 7,
uint8_t response2a[5] = {0x00};
- if (flags & FLAG_7B_UID_IN_DATA) {
- response2[0] = 0x88;
+ if ( (flags & FLAG_7B_UID_IN_DATA) == FLAG_7B_UID_IN_DATA ) {
+ response2[0] = 0x88; // Cascade Tag marker
response2[1] = data[0];
response2[2] = data[1];
response2[3] = data[2];
// Configure the ATQA and SAK accordingly
response1[0] |= 0x40;
sak |= 0x04;
+
+ cuid = bytes_to_num(data+3, 4);
} else {
memcpy(response2, data, 4);
- //num_to_bytes(uid_1st,4,response2);
// Configure the ATQA and SAK accordingly
response1[0] &= 0xBF;
sak &= 0xFB;
+ cuid = bytes_to_num(data, 4);
}
// Calculate the BitCountCheck (BCC) for the first 4 bytes of the UID.
response2[4] = response2[0] ^ response2[1] ^ response2[2] ^ response2[3];
// Prepare the mandatory SAK (for 4 and 7 byte UID)
- uint8_t response3[3] = {0x00};
- response3[0] = sak;
+ uint8_t response3[3] = {sak, 0x00, 0x00};
ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]);
// Prepare the optional second SAK (for 7 byte UID), drop the cascade bit
response3a[0] = sak & 0xFB;
ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
- uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
- uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS:
+ // Tag NONCE.
+ uint8_t response5[4];
+
+ uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS:
// Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present,
// TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
// TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
// TC(1) = 0x02: CID supported, NAD not supported
ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
-
- // Prepare GET_VERSION (different for UL EV-1 / NTAG)
- //uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7}; //EV1 48bytes VERSION.
- //uint8_t response7_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215
+ // Prepare GET_VERSION (different for UL EV-1 / NTAG)
+ // uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7}; //EV1 48bytes VERSION.
+ // uint8_t response7_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215
// Prepare CHK_TEARING
- //uint8_t response9[] = {0xBD,0x90,0x3f};
+ // uint8_t response9[] = {0xBD,0x90,0x3f};
#define TAG_RESPONSE_COUNT 10
tag_response_info_t responses[TAG_RESPONSE_COUNT] = {
{ .response = response8, .response_n = sizeof(response8) } // EV1/NTAG PACK response
};
- //{ .response = response7_NTAG, .response_n = sizeof(response7_NTAG)}, // EV1/NTAG GET_VERSION response
- //{ .response = response9, .response_n = sizeof(response9) } // EV1/NTAG CHK_TEAR response
+ // { .response = response7_NTAG, .response_n = sizeof(response7_NTAG)}, // EV1/NTAG GET_VERSION response
+ // { .response = response9, .response_n = sizeof(response9) } // EV1/NTAG CHK_TEAR response
// Allocate 512 bytes for the dynamic modulation, created when the reader queries for it
iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
BigBuf_free_keep_EM();
+ clear_trace();
+ set_tracing(TRUE);
// allocate buffers:
uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
- // clear trace
- clear_trace();
- set_tracing(TRUE);
-
// Prepare the responses of the anticollision phase
// there will be not enough time to do this at the moment the reader sends it REQA
for (size_t i=0; i<TAG_RESPONSE_COUNT; i++)
int happened = 0;
int happened2 = 0;
int cmdsRecvd = 0;
-
- cmdsRecvd = 0;
tag_response_info_t* p_response;
LED_A_ON();
- for(;;) {
-
+ for(;;) {
WDT_HIT();
// Clean receive command buffer
if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
- DbpString("Button press");
+ Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
break;
- }
-
+ }
p_response = NULL;
// Okay, look at the command now.
lastorder = order;
- if(receivedCmd[0] == 0x26) { // Received a REQUEST
+ if(receivedCmd[0] == ISO14443A_CMD_REQA) { // Received a REQUEST
p_response = &responses[0]; order = 1;
- } else if(receivedCmd[0] == 0x52) { // Received a WAKEUP
+ } else if(receivedCmd[0] == ISO14443A_CMD_WUPA) { // Received a WAKEUP
p_response = &responses[0]; order = 6;
- } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // Received request for UID (cascade 1)
+ } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT) { // Received request for UID (cascade 1)
p_response = &responses[1]; order = 2;
- } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x95) { // Received request for UID (cascade 2)
+ } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2) { // Received request for UID (cascade 2)
p_response = &responses[2]; order = 20;
- } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x93) { // Received a SELECT (cascade 1)
+ } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT) { // Received a SELECT (cascade 1)
p_response = &responses[3]; order = 3;
- } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) { // Received a SELECT (cascade 2)
- p_response = &responses[4]; order = 30;
- } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ
+ } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2) { // Received a SELECT (cascade 2)
+ p_response = &responses[4]; order = 30;
+ } else if(receivedCmd[0] == ISO14443A_CMD_READBLOCK) { // Received a (plain) READ
uint8_t block = receivedCmd[1];
// if Ultralight or NTAG (4 byte blocks)
if ( tagType == 7 || tagType == 2 ) {
- //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+ // first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
uint16_t start = 4 * (block+12);
- uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
- emlGetMemBt( emdata, start, 16);
- AppendCrc14443a(emdata, 16);
- EmSendCmdEx(emdata, sizeof(emdata), false);
+ uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
+ emlGetMemBt( emdata, start, 16);
+ AppendCrc14443a(emdata, 16);
+ EmSendCmdEx(emdata, sizeof(emdata), false);
// We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
p_response = NULL;
} else { // all other tags (16 byte block tags)
- EmSendCmdEx(data+(4*receivedCmd[1]),16,false);
+ uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
+ emlGetMemBt( emdata, block, 16);
+ AppendCrc14443a(emdata, 16);
+ EmSendCmdEx(emdata, sizeof(emdata), false);
+ // EmSendCmdEx(data+(4*receivedCmd[1]),16,false);
// Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
// We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
p_response = NULL;
}
- } else if(receivedCmd[0] == 0x3A) { // Received a FAST READ (ranged read)
-
- uint8_t emdata[MAX_FRAME_SIZE];
- //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
- int start = (receivedCmd[1]+12) * 4;
- int len = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
- emlGetMemBt( emdata, start, len);
- AppendCrc14443a(emdata, len);
- EmSendCmdEx(emdata, len+2, false);
- p_response = NULL;
-
- } else if(receivedCmd[0] == 0x3C && tagType == 7) { // Received a READ SIGNATURE --
- // ECC data, taken from a NTAG215 amiibo token. might work. LEN: 32, + 2 crc
- //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
- uint16_t start = 4 * 4;
- uint8_t emdata[34];
- emlGetMemBt( emdata, start, 32);
- AppendCrc14443a(emdata, 32);
- EmSendCmdEx(emdata, sizeof(emdata), false);
- //uint8_t data[] = {0x56,0x06,0xa6,0x4f,0x43,0x32,0x53,0x6f,
- // 0x43,0xda,0x45,0xd6,0x61,0x38,0xaa,0x1e,
- // 0xcf,0xd3,0x61,0x36,0xca,0x5f,0xbb,0x05,
- // 0xce,0x21,0x24,0x5b,0xa6,0x7a,0x79,0x07,
- // 0x00,0x00};
- //AppendCrc14443a(data, sizeof(data)-2);
- //EmSendCmdEx(data,sizeof(data),false);
- p_response = NULL;
- } else if (receivedCmd[0] == 0x39 && tagType == 7) { // Received a READ COUNTER --
+ } else if(receivedCmd[0] == MIFARE_ULEV1_FASTREAD) { // Received a FAST READ (ranged read)
+ uint8_t emdata[MAX_FRAME_SIZE];
+ // first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+ int start = (receivedCmd[1]+12) * 4;
+ int len = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
+ emlGetMemBt( emdata, start, len);
+ AppendCrc14443a(emdata, len);
+ EmSendCmdEx(emdata, len+2, false);
+ p_response = NULL;
+ } else if(receivedCmd[0] == MIFARE_ULEV1_READSIG && tagType == 7) { // Received a READ SIGNATURE --
+ // first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+ uint16_t start = 4 * 4;
+ uint8_t emdata[34];
+ emlGetMemBt( emdata, start, 32);
+ AppendCrc14443a(emdata, 32);
+ EmSendCmdEx(emdata, sizeof(emdata), false);
+ p_response = NULL;
+ } else if (receivedCmd[0] == MIFARE_ULEV1_READ_CNT && tagType == 7) { // Received a READ COUNTER --
uint8_t index = receivedCmd[1];
- uint8_t data[] = {0x00,0x00,0x00,0x14,0xa5};
+ uint8_t cmd[] = {0x00,0x00,0x00,0x14,0xa5};
if ( counters[index] > 0) {
- num_to_bytes(counters[index], 3, data);
- AppendCrc14443a(data, sizeof(data)-2);
+ num_to_bytes(counters[index], 3, cmd);
+ AppendCrc14443a(cmd, sizeof(cmd)-2);
}
- EmSendCmdEx(data,sizeof(data),false);
+ EmSendCmdEx(cmd,sizeof(cmd),false);
p_response = NULL;
- } else if (receivedCmd[0] == 0xA5 && tagType == 7) { // Received a INC COUNTER --
+ } else if (receivedCmd[0] == MIFARE_ULEV1_INCR_CNT && tagType == 7) { // Received a INC COUNTER --
// number of counter
uint8_t counter = receivedCmd[1];
uint32_t val = bytes_to_num(receivedCmd+2,4);
// send ACK
uint8_t ack[] = {0x0a};
EmSendCmdEx(ack,sizeof(ack),false);
- p_response = NULL;
-
- } else if(receivedCmd[0] == 0x3E && tagType == 7) { // Received a CHECK_TEARING_EVENT --
- //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+ p_response = NULL;
+ } else if(receivedCmd[0] == MIFARE_ULEV1_CHECKTEAR && tagType == 7) { // Received a CHECK_TEARING_EVENT --
+ // first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
uint8_t emdata[3];
uint8_t counter=0;
if (receivedCmd[1]<3) counter = receivedCmd[1];
emlGetMemBt( emdata, 10+counter, 1);
AppendCrc14443a(emdata, sizeof(emdata)-2);
EmSendCmdEx(emdata, sizeof(emdata), false);
- p_response = NULL;
- //p_response = &responses[9];
-
- } else if(receivedCmd[0] == 0x50) { // Received a HALT
+ p_response = NULL;
+ } else if(receivedCmd[0] == ISO14443A_CMD_HALT) { // Received a HALT
LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
p_response = NULL;
- } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) { // Received an authentication request
-
+ } else if(receivedCmd[0] == MIFARE_AUTH_KEYA || receivedCmd[0] == MIFARE_AUTH_KEYB) { // Received an authentication request
if ( tagType == 7 ) { // IF NTAG /EV1 0x60 == GET_VERSION, not a authentication request.
uint8_t emdata[10];
emlGetMemBt( emdata, 0, 8 );
AppendCrc14443a(emdata, sizeof(emdata)-2);
- EmSendCmdEx(emdata, sizeof(emdata), false);
+ EmSendCmdEx(emdata, sizeof(emdata), false);
p_response = NULL;
- //p_response = &responses[7];
} else {
- p_response = &responses[5]; order = 7;
+
+ cardAUTHKEY = receivedCmd[0] - 0x60;
+ cardAUTHSC = receivedCmd[1] / 4; // received block num
+
+ // incease nonce at AUTH requests. this is time consuming.
+ nonce = prand();
+ //num_to_bytes(nonce, 4, response5);
+ num_to_bytes(nonce, 4, dynamic_response_info.response);
+ dynamic_response_info.response_n = 4;
+
+ //prepare_tag_modulation(&responses[5], DYNAMIC_MODULATION_BUFFER_SIZE);
+ prepare_tag_modulation(&dynamic_response_info, DYNAMIC_MODULATION_BUFFER_SIZE);
+ p_response = &dynamic_response_info;
+ //p_response = &responses[5];
+ order = 7;
}
- } else if(receivedCmd[0] == 0xE0) { // Received a RATS request
+ } else if(receivedCmd[0] == ISO14443A_CMD_RATS) { // Received a RATS request
if (tagType == 1 || tagType == 2) { // RATS not supported
EmSend4bit(CARD_NACK_NA);
p_response = NULL;
}
} else if (order == 7 && len == 8) { // Received {nr] and {ar} (part of authentication)
LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
- uint32_t nonce = bytes_to_num(response5,4);
uint32_t nr = bytes_to_num(receivedCmd,4);
uint32_t ar = bytes_to_num(receivedCmd+4,4);
- //Dbprintf("Auth attempt {nonce}{nr}{ar}: %08x %08x %08x", nonce, nr, ar);
-
- if(flags & FLAG_NR_AR_ATTACK )
- {
- if(ar_nr_collected < 2){
- // Avoid duplicates... probably not necessary, nr should vary.
- //if(ar_nr_responses[3] != nr){
- ar_nr_responses[ar_nr_collected*5] = 0;
- ar_nr_responses[ar_nr_collected*5+1] = 0;
- ar_nr_responses[ar_nr_collected*5+2] = nonce;
- ar_nr_responses[ar_nr_collected*5+3] = nr;
- ar_nr_responses[ar_nr_collected*5+4] = ar;
- ar_nr_collected++;
- //}
- }
-
- if(ar_nr_collected > 1 ) {
+
+ // Collect AR/NR per keytype & sector
+ if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
- if (MF_DBGLEVEL >= 2) {
- Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
- Dbprintf("../tools/mfkey/mfkey32 %07x%08x %08x %08x %08x %08x %08x",
- ar_nr_responses[0], // UID1
- ar_nr_responses[1], // UID2
- ar_nr_responses[2], // NT
- ar_nr_responses[3], // AR1
- ar_nr_responses[4], // NR1
- ar_nr_responses[8], // AR2
- ar_nr_responses[9] // NR2
- );
- Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x",
- ar_nr_responses[0], // UID1
- ar_nr_responses[1], // UID2
- ar_nr_responses[2], // NT1
- ar_nr_responses[3], // AR1
- ar_nr_responses[4], // NR1
- ar_nr_responses[7], // NT2
- ar_nr_responses[8], // AR2
- ar_nr_responses[9] // NR2
- );
+ int8_t index = -1;
+ int8_t empty = -1;
+ for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ // find which index to use
+ if ( (cardAUTHSC == ar_nr_nonces[i].sector) && (cardAUTHKEY == ar_nr_nonces[i].keytype))
+ index = i;
+
+ // keep track of empty slots.
+ if ( ar_nr_nonces[i].state == EMPTY)
+ empty = i;
+ }
+ // if no empty slots. Choose first and overwrite.
+ if ( index == -1 ) {
+ if ( empty == -1 ) {
+ index = 0;
+ ar_nr_nonces[index].state = EMPTY;
+ } else {
+ index = empty;
+ }
+ }
+
+ switch(ar_nr_nonces[index].state) {
+ case EMPTY: {
+ // first nonce collect
+ ar_nr_nonces[index].cuid = cuid;
+ ar_nr_nonces[index].sector = cardAUTHSC;
+ ar_nr_nonces[index].keytype = cardAUTHKEY;
+ ar_nr_nonces[index].nonce = nonce;
+ ar_nr_nonces[index].nr = nr;
+ ar_nr_nonces[index].ar = ar;
+ ar_nr_nonces[index].state = FIRST;
+ break;
+ }
+ case FIRST : {
+ // second nonce collect
+ ar_nr_nonces[index].nonce2 = nonce;
+ ar_nr_nonces[index].nr2 = nr;
+ ar_nr_nonces[index].ar2 = ar;
+ ar_nr_nonces[index].state = SECOND;
+
+ // send to client
+ cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
+
+ ar_nr_nonces[index].state = EMPTY;
+ ar_nr_nonces[index].sector = 0;
+ ar_nr_nonces[index].keytype = 0;
+
+ moebius_count++;
+ break;
}
- uint8_t len = ar_nr_collected*5*4;
- cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,len,0,&ar_nr_responses,len);
- ar_nr_collected = 0;
- memset(ar_nr_responses, 0x00, len);
+ default: break;
}
}
- } else if (receivedCmd[0] == 0x1a ) // ULC authentication
- {
+ p_response = NULL;
- }
- else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication
- {
+ } else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication
+ } else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication
if ( tagType == 7 ) {
- uint16_t start = 13; //first 4 blocks of emu are [getversion answer - check tearing - pack - 0x00]
+ uint16_t start = 13; // first 4 blocks of emu are [getversion answer - check tearing - pack - 0x00]
uint8_t emdata[4];
emlGetMemBt( emdata, start, 2);
AppendCrc14443a(emdata, 2);
EmSendCmdEx(emdata, sizeof(emdata), false);
p_response = NULL;
- //p_response = &responses[8]; // PACK response
uint32_t pwd = bytes_to_num(receivedCmd+1,4);
- if ( MF_DBGLEVEL >= 3) Dbprintf("Auth attempt: %08x", pwd);
+ if ( MF_DBGLEVEL >= 3) Dbprintf("Auth attempt: %08x", pwd);
}
} else {
// Check for ISO 14443A-4 compliant commands, look at left nibble
dynamic_response_info.response_n = 2;
} break;
- case 0xaa:
- case 0xbb: {
+ case 0xAA:
+ case 0xBB: {
dynamic_response_info.response[0] = receivedCmd[0] ^ 0x11;
dynamic_response_info.response_n = 2;
} break;
dynamic_response_info.response[1] = receivedCmd[1];
// Add CRC bytes, always used in ISO 14443A-4 compliant cards
- AppendCrc14443a(dynamic_response_info.response,dynamic_response_info.response_n);
+ AppendCrc14443a(dynamic_response_info.response, dynamic_response_info.response_n);
dynamic_response_info.response_n += 2;
if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
- Dbprintf("Error preparing tag response");
+ DbpString("Error preparing tag response");
LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
}
// Count number of other messages after a halt
if(order != 6 && lastorder == 5) { happened2++; }
+ // comment this limit if you want to simulation longer
+ if (!tracing) {
+ DbpString("Trace Full. Simulation stopped.");
+ break;
+ }
+ // comment this limit if you want to simulation longer
if(cmdsRecvd > 999) {
DbpString("1000 commands later...");
break;
(LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG,
par);
}
-
- if (!tracing) {
- Dbprintf("Trace Full. Simulation stopped.");
- break;
- }
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
set_tracing(FALSE);
BigBuf_free_keep_EM();
LED_A_OFF();
-
+
+ /*
+ if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
+
+ for ( uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ if (ar_nr_collected[i] == 2) {
+ Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
+ Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
+ ar_nr_resp[i].cuid, //UID
+ ar_nr_resp[i].nonce, //NT
+ ar_nr_resp[i].nr, //NR1
+ ar_nr_resp[i].ar, //AR1
+ ar_nr_resp[i].nr2, //NR2
+ ar_nr_resp[i].ar2 //AR2
+ );
+ }
+ }
+
+ for ( uint8_t i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
+ if (ar_nr_collected[i] == 2) {
+ Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
+ Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
+ ar_nr_resp[i].cuid, //UID
+ ar_nr_resp[i].nonce, //NT
+ ar_nr_resp[i].nr, //NR1
+ ar_nr_resp[i].ar, //AR1
+ ar_nr_resp[i].nonce2,//NT2
+ ar_nr_resp[i].nr2, //NR2
+ ar_nr_resp[i].ar2 //AR2
+ );
+ }
+ }
+ }
+ */
+
if (MF_DBGLEVEL >= 4){
- Dbprintf("-[ Wake ups after halt [%d]", happened);
- Dbprintf("-[ Messages after halt [%d]", happened2);
- Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
+ Dbprintf("-[ Wake ups after halt [%d]", happened);
+ Dbprintf("-[ Messages after halt [%d]", happened2);
+ Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
+ Dbprintf("-[ Num of moebius tries [%d]", moebius_count);
}
+
+ cmd_send(CMD_ACK,1,0,0,0,0);
}
-
// prepare a delayed transfer. This simply shifts ToSend[] by a number
// of bits specified in the delay parameter.
-void PrepareDelayedTransfer(uint16_t delay)
-{
+void PrepareDelayedTransfer(uint16_t delay) {
+ delay &= 0x07;
+ if (!delay) return;
+
uint8_t bitmask = 0;
uint8_t bits_to_shift = 0;
uint8_t bits_shifted = 0;
+ uint16_t i = 0;
- delay &= 0x07;
- if (delay) {
- for (uint16_t i = 0; i < delay; i++) {
- bitmask |= (1 << i);
- }
- ToSend[++ToSendMax] = 0x00;
- for (uint16_t i = 0; i < ToSendMax; i++) {
+ for (i = 0; i < delay; ++i)
+ bitmask |= (0x01 << i);
+
+ ToSend[++ToSendMax] = 0x00;
+
+ for (i = 0; i < ToSendMax; ++i) {
bits_to_shift = ToSend[i] & bitmask;
ToSend[i] = ToSend[i] >> delay;
ToSend[i] = ToSend[i] | (bits_shifted << (8 - delay));
bits_shifted = bits_to_shift;
}
}
-}
//-------------------------------------------------------------------------------------
// if == 0: transfer immediately and return time of transfer
// if != 0: delay transfer until time specified
//-------------------------------------------------------------------------------------
-static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing)
-{
+static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
uint32_t ThisTransferTime = 0;
PrepareDelayedTransfer(*timing & 0x00000007); // Delay transfer (fine tuning - up to 7 MF clock ticks)
}
if(MF_DBGLEVEL >= 4 && GetCountSspClk() >= (*timing & 0xfffffff8)) Dbprintf("TransmitFor14443a: Missed timing");
-
while(GetCountSspClk() < (*timing & 0xfffffff8)); // Delay transfer (multiple of 8 MF clock ticks)
LastTimeProxToAirStart = *timing;
} else {
ThisTransferTime = ((MAX(NextTransferTime, GetCountSspClk()) & 0xfffffff8) + 8);
+
while(GetCountSspClk() < ThisTransferTime);
+
LastTimeProxToAirStart = ThisTransferTime;
}
NextTransferTime = MAX(NextTransferTime, LastTimeProxToAirStart + REQUEST_GUARD_TIME);
}
-
//-----------------------------------------------------------------------------
// Prepare reader command (in bits, support short frames) to send to FPGA
//-----------------------------------------------------------------------------
-void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
-{
+void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity) {
int i, j;
int last = 0;
uint8_t b;
//-----------------------------------------------------------------------------
// Prepare reader command to send to FPGA
//-----------------------------------------------------------------------------
-void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity)
-{
- //CodeIso14443aBitsAsReaderPar(cmd, len*8, parity);
- CodeIso14443aBitsAsReaderPar(cmd, len<<3, parity);
+void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity) {
+ CodeIso14443aBitsAsReaderPar(cmd, len*8, parity);
}
-
//-----------------------------------------------------------------------------
// Wait for commands from reader
// Stop when button is pressed (return 1) or field was gone (return 2)
// Or return 0 when command is captured
//-----------------------------------------------------------------------------
-static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
-{
+static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) {
*len = 0;
uint32_t timer = 0, vtime = 0;
return 0;
}
}
-
}
}
-
-static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded)
-{
+int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded) {
uint8_t b;
uint16_t i = 0;
uint32_t ThisTransferTime;
if (Uart.parityBits & 0x01) {
correctionNeeded = TRUE;
}
- if(correctionNeeded) {
- // 1236, so correction bit needed
- i = 0;
- } else {
- i = 1;
- }
+ // 1236, so correction bit needed
+ i = (correctionNeeded) ? 0 : 1;
// clear receiving shift register and holding register
while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY));
b = AT91C_BASE_SSC->SSC_RHR; (void) b;
// wait for the FPGA to signal fdt_indicator == 1 (the FPGA is ready to queue new data in its delay line)
- for (uint16_t j = 0; j < 5; j++) { // allow timeout - better late than never
+ for (uint8_t j = 0; j < 5; j++) { // allow timeout - better late than never
while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY));
if (AT91C_BASE_SSC->SSC_RHR) break;
}
i++;
}
}
-
LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0);
-
return 0;
}
// If a response is captured return TRUE
// If it takes too long return FALSE
//-----------------------------------------------------------------------------
-static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset)
-{
+static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) {
uint32_t c = 0x00;
// Set FPGA mode to "reader listen mode", no modulation (listen
}
}
-void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing)
-{
+void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) {
+
CodeIso14443aBitsAsReaderPar(frame, bits, par);
-
// Send command to tag
TransmitFor14443a(ToSend, ToSendMax, timing);
- if(trigger)
- LED_A_ON();
+ if(trigger) LED_A_ON();
- // Log reader command in trace buffer
- //LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, TRUE);
LogTrace(frame, nbytes(bits), (LastTimeProxToAirStart<<4) + DELAY_ARM2AIR_AS_READER, ((LastTimeProxToAirStart + LastProxToAirDuration)<<4) + DELAY_ARM2AIR_AS_READER, par, TRUE);
}
-void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing)
-{
- //ReaderTransmitBitsPar(frame, len*8, par, timing);
- ReaderTransmitBitsPar(frame, len<<3, par, timing);
+void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing) {
+ ReaderTransmitBitsPar(frame, len*8, par, timing);
}
-void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
-{
- // Generate parity and redirect
- uint8_t par[MAX_PARITY_SIZE] = {0x00};
- //GetParity(frame, len/8, par);
- GetParity(frame, len >> 3, par);
- ReaderTransmitBitsPar(frame, len, par, timing);
+void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing) {
+ // Generate parity and redirect
+ uint8_t par[MAX_PARITY_SIZE] = {0x00};
+ GetParity(frame, len/8, par);
+ ReaderTransmitBitsPar(frame, len, par, timing);
}
-void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
-{
- // Generate parity and redirect
- uint8_t par[MAX_PARITY_SIZE] = {0x00};
- GetParity(frame, len, par);
- //ReaderTransmitBitsPar(frame, len*8, par, timing);
- ReaderTransmitBitsPar(frame, len<<3, par, timing);
+void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing) {
+ // Generate parity and redirect
+ uint8_t par[MAX_PARITY_SIZE] = {0x00};
+ GetParity(frame, len, par);
+ ReaderTransmitBitsPar(frame, len*8, par, timing);
}
-int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
-{
- if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset))
+int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity) {
+ if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset))
return FALSE;
-
- //LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE);
- LogTrace(receivedAnswer, Demod.len, (Demod.startTime<<4) - DELAY_AIR2ARM_AS_READER, (Demod.endTime<<4) - DELAY_AIR2ARM_AS_READER, parity, FALSE);
+ LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE);
return Demod.len;
}
-int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
-{
- if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0))
+int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity) {
+ if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0))
return FALSE;
-
- //LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE);
- LogTrace(receivedAnswer, Demod.len, (Demod.startTime<<4) - DELAY_AIR2ARM_AS_READER, (Demod.endTime<<4) - DELAY_AIR2ARM_AS_READER, parity, FALSE);
+ LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, FALSE);
return Demod.len;
}
// if anticollision is false, then the UID must be provided in uid_ptr[]
// and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades) {
- uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
- uint8_t sel_all[] = { 0x93,0x20 };
- uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
- uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
+ uint8_t wupa[] = { ISO14443A_CMD_WUPA }; // 0x26 - ISO14443A_CMD_REQA 0x52 - ISO14443A_CMD_WUPA
+ uint8_t sel_all[] = { ISO14443A_CMD_ANTICOLL_OR_SELECT,0x20 };
+ uint8_t sel_uid[] = { ISO14443A_CMD_ANTICOLL_OR_SELECT,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+ uint8_t rats[] = { ISO14443A_CMD_RATS,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
uint8_t resp[MAX_FRAME_SIZE] = {0}; // theoretically. A usual RATS will be much smaller
uint8_t resp_par[MAX_PARITY_SIZE] = {0};
byte_t uid_resp[4] = {0};
memset(uid_ptr,0,10);
}
+ // reset the PCB block number
+ iso14_pcb_blocknum = 0;
+
// check for proprietary anticollision:
if ((resp[0] & 0x1F) == 0) return 3;
p_hi14a_card->ats_len = len;
}
- // reset the PCB block number
- iso14_pcb_blocknum = 0;
-
// set default timeout based on ATS
iso14a_set_ATS_timeout(resp);
-
return 1;
}
void iso14443a_setup(uint8_t fpga_minor_mode) {
+
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Set up the synchronous serial port
FpgaSetupSsc();
// connect Demodulated Signal to ADC:
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ LED_D_OFF();
// Signal field is on with the appropriate LED
- if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD
- || fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN) {
+ if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD ||
+ fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN)
LED_D_ON();
- } else {
- LED_D_OFF();
- }
+
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode);
+ SpinDelay(20);
+
// Start the timer
StartCountSspClk();
+ // Prepare the demodulation functions
DemodReset();
UartReset();
- NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;
- iso14a_set_timeout(10*106); // 10ms default
+ NextTransferTime = 2 * DELAY_ARM2AIR_AS_READER;
+ iso14a_set_timeout(10*106); // 20ms default
}
int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
ReaderTransmit(real_cmd, cmd_len+4, NULL);
size_t len = ReaderReceive(data, parity);
+ //DATA LINK ERROR
+ if (!len) return 0;
+
uint8_t *data_bytes = (uint8_t *) data;
- if (!len)
- return 0; //DATA LINK ERROR
+
// if we received an I- or R(ACK)-Block with a block number equal to the
// current block number, toggle the current block number
- else if (len >= 4 // PCB+CID+CRC = 4 bytes
+ if (len >= 4 // PCB+CID+CRC = 4 bytes
&& ((data_bytes[0] & 0xC0) == 0 // I-Block
|| (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
&& (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
{
iso14_pcb_blocknum ^= 1;
}
-
return len;
}
+
//-----------------------------------------------------------------------------
// Read an ISO 14443a tag. Send out commands and store answers.
-//
//-----------------------------------------------------------------------------
-void ReaderIso14443a(UsbCommand *c)
-{
+void ReaderIso14443a(UsbCommand *c) {
iso14a_command_t param = c->arg[0];
- uint8_t *cmd = c->d.asBytes;
size_t len = c->arg[1] & 0xffff;
size_t lenbits = c->arg[1] >> 16;
uint32_t timeout = c->arg[2];
+ uint8_t *cmd = c->d.asBytes;
uint32_t arg0 = 0;
byte_t buf[USB_CMD_DATA_SIZE] = {0x00};
uint8_t par[MAX_PARITY_SIZE] = {0x00};
if (param & ISO14A_REQUEST_TRIGGER)
iso14a_set_trigger(TRUE);
-
if (param & ISO14A_CONNECT) {
iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
if(!(param & ISO14A_NO_SELECT)) {
iso14a_card_select_t *card = (iso14a_card_select_t*)buf;
arg0 = iso14443a_select_card(NULL,card,NULL, true, 0);
- cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
+ cmd_send(CMD_ACK, arg0, card->uidlen, 0, buf, sizeof(iso14a_card_select_t));
+ // if it fails, the cmdhf14a.c client quites.. however this one still executes.
+ if ( arg0 == 0 ) return;
}
}
}
if (param & ISO14A_RAW) {
- if(param & ISO14A_APPEND_CRC) {
- if(param & ISO14A_TOPAZMODE) {
+ if (param & ISO14A_APPEND_CRC) {
+ if (param & ISO14A_TOPAZMODE)
AppendCrc14443b(cmd,len);
- } else {
+ else
AppendCrc14443a(cmd,len);
- }
+
len += 2;
if (lenbits) lenbits += 16;
}
- if(lenbits>0) { // want to send a specific number of bits (e.g. short commands)
- if(param & ISO14A_TOPAZMODE) {
+ if (lenbits>0) { // want to send a specific number of bits (e.g. short commands)
+ if (param & ISO14A_TOPAZMODE) {
int bits_to_send = lenbits;
uint16_t i = 0;
ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity
ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity
}
} else { // want to send complete bytes only
- if(param & ISO14A_TOPAZMODE) {
+ if (param & ISO14A_TOPAZMODE) {
uint16_t i = 0;
ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy
while (i < len) {
if (param & ISO14A_REQUEST_TRIGGER)
iso14a_set_trigger(FALSE);
-
if (param & ISO14A_NO_DISCONNECT)
return;
LEDsoff();
}
-
// Determine the distance between two nonces.
// Assume that the difference is small, but we don't know which is first.
// Therefore try in alternating directions.
int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
if (nt1 == nt2) return 0;
-
+
uint32_t nttmp1 = nt1;
uint32_t nttmp2 = nt2;
-
- for (uint16_t i = 1; i < 0xFFFF; i += 8) {
- nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i;
- nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i;
-
- nttmp1 = prng_successor(nttmp1, 2); if (nttmp1 == nt2) return i+1;
- nttmp2 = prng_successor(nttmp2, 2); if (nttmp2 == nt1) return -i-1;
-
- nttmp1 = prng_successor(nttmp1, 3); if (nttmp1 == nt2) return i+2;
- nttmp2 = prng_successor(nttmp2, 3); if (nttmp2 == nt1) return -i-2;
-
- nttmp1 = prng_successor(nttmp1, 4); if (nttmp1 == nt2) return i+3;
- nttmp2 = prng_successor(nttmp2, 4); if (nttmp2 == nt1) return -i-3;
- nttmp1 = prng_successor(nttmp1, 5); if (nttmp1 == nt2) return i+4;
- nttmp2 = prng_successor(nttmp2, 5); if (nttmp2 == nt1) return -i-4;
-
- nttmp1 = prng_successor(nttmp1, 6); if (nttmp1 == nt2) return i+5;
- nttmp2 = prng_successor(nttmp2, 6); if (nttmp2 == nt1) return -i-5;
-
- nttmp1 = prng_successor(nttmp1, 7); if (nttmp1 == nt2) return i+6;
- nttmp2 = prng_successor(nttmp2, 7); if (nttmp2 == nt1) return -i-6;
+ // 0xFFFF -- Half up and half down to find distance between nonces
+ for (uint16_t i = 1; i < 32768/8; i += 8) {
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+1;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+2;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+3;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+4;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+5;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+6;
+ nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i+7;
- nttmp1 = prng_successor(nttmp1, 8); if (nttmp1 == nt2) return i+7;
- nttmp2 = prng_successor(nttmp2, 8); if (nttmp2 == nt1) return -i-7;
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i;
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+1);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+2);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+3);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+4);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+5);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+6);
+ nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -(i+7);
}
-
- return(-99999); // either nt1 or nt2 are invalid nonces
+ // either nt1 or nt2 are invalid nonces
+ return(-99999);
}
-
//-----------------------------------------------------------------------------
// Recover several bits of the cypher stream. This implements (first stages of)
// the algorithm described in "The Dark Side of Security by Obscurity and
// Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
// (article by Nicolas T. Courtois, 2009)
//-----------------------------------------------------------------------------
-void ReaderMifare(bool first_try, uint8_t block )
-{
- // Mifare AUTH
- //uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
- //uint8_t mf_auth[] = { 0x60,0x05, 0x58, 0x2c };
- uint8_t mf_auth[] = { 0x60,0x00, 0x00, 0x00 };
- uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
- static uint8_t mf_nr_ar3 = 0;
- mf_auth[1] = block;
- AppendCrc14443a(mf_auth, 2);
+void ReaderMifare(bool first_try, uint8_t block, uint8_t keytype ) {
+ uint8_t mf_auth[] = { keytype, block, 0x00, 0x00 };
+ uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
+ uint8_t uid[10] = {0,0,0,0,0,0,0,0,0,0};
+ uint8_t par_list[8] = {0,0,0,0,0,0,0,0};
+ uint8_t ks_list[8] = {0,0,0,0,0,0,0,0};
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
-
- byte_t nt_diff = 0;
uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
- static byte_t par_low = 0;
- uint8_t uid[10] = {0};
- //uint32_t cuid = 0;
-
+ byte_t nt_diff = 0;
uint32_t nt = 0;
- uint32_t previous_nt = 0;
- static uint32_t nt_attacked = 0;
- byte_t par_list[8] = {0x00};
- byte_t ks_list[8] = {0x00};
-
- static uint32_t sync_time = 0;
- static int32_t sync_cycles = 0;
- int catch_up_cycles = 0;
- int last_catch_up = 0;
+ uint32_t previous_nt = 0;
+ uint32_t cuid = 0;
+
+ int32_t catch_up_cycles = 0;
+ int32_t last_catch_up = 0;
+ int32_t isOK = 0;
+ int32_t nt_distance = 0;
+
uint16_t elapsed_prng_sequences = 1;
uint16_t consecutive_resyncs = 0;
- int isOK = 0;
-
- #define PRNG_SEQUENCE_LENGTH (1 << 16);
- #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
- #define MAX_SYNC_TRIES 32
- #define NUM_DEBUG_INFOS 8 // per strategy
- #define MAX_STRATEGY 3
-
uint16_t unexpected_random = 0;
uint16_t sync_tries = 0;
- uint16_t strategy = 0;
- uint32_t halt_time = 0;
- clear_trace();
- set_tracing(TRUE);
+ // static variables here, is re-used in the next call
+ static uint32_t nt_attacked = 0;
+ static uint32_t sync_time = 0;
+ static uint32_t sync_cycles = 0;
+ static uint8_t par_low = 0;
+ static uint8_t mf_nr_ar3 = 0;
- LED_A_ON();
- LED_B_OFF();
- LED_C_OFF();
+ #define PRNG_SEQUENCE_LENGTH (1 << 16)
+ #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
+ #define MAX_SYNC_TRIES 32
- if (first_try)
- iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+ AppendCrc14443a(mf_auth, 2);
- // free eventually allocated BigBuf memory. We want all for tracing.
- BigBuf_free();
+ BigBuf_free(); BigBuf_Clear_ext(false);
+ clear_trace();
+ set_tracing(FALSE);
+ iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
- if (first_try) {
- sync_time = GetCountSspClk() & 0xfffffff8;
- sync_cycles = PRNG_SEQUENCE_LENGTH; //65536; //0x10000 // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
- mf_nr_ar3 = 0;
- nt_attacked = 0;
- par[0] = 0;
+ sync_time = GetCountSspClk() & 0xfffffff8;
+ sync_cycles = PRNG_SEQUENCE_LENGTH; // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
+ nt_attacked = 0;
+
+ if (MF_DBGLEVEL >= 4) Dbprintf("Mifare::Sync %u", sync_time);
+
+ if (first_try) {
+ mf_nr_ar3 = 0;
+ par_low = 0;
} else {
- // we were unsuccessful on a previous call. Try another READER nonce (first 3 parity bits remain the same)
- mf_nr_ar3++;
+ // we were unsuccessful on a previous call.
+ // Try another READER nonce (first 3 parity bits remain the same)
+ ++mf_nr_ar3;
mf_nr_ar[3] = mf_nr_ar3;
par[0] = par_low;
}
-
+
+ bool have_uid = FALSE;
+ uint8_t cascade_levels = 0;
+
LED_C_ON();
- for(uint16_t i = 0; TRUE; ++i) {
+ uint16_t i;
+ for(i = 0; TRUE; ++i) {
WDT_HIT();
break;
}
- if (strategy == 2) {
- // test with additional halt command
- halt_time = 0;
- int len = mifare_sendcmd_short(NULL, false, 0x50, 0x00, receivedAnswer, receivedAnswerPar, &halt_time);
-
- if (len && MF_DBGLEVEL >= 3)
- Dbprintf("Unexpected response of %d bytes to halt command.", len);
- }
-
- if (strategy == 3) {
- // test with FPGA power off/on
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- SpinDelay(200);
- iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
- SpinDelay(100);
- sync_time = GetCountSspClk() & 0xfffffff8;
- WDT_HIT();
- }
-
- if (!iso14443a_select_card(uid, NULL, NULL, true, 0)) {
- if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card\n");
- continue;
+ // this part is from Piwi's faster nonce collecting part in Hardnested.
+ if (!have_uid) { // need a full select cycle to get the uid first
+ iso14a_card_select_t card_info;
+ if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0)) {
+ if (MF_DBGLEVEL >= 4) Dbprintf("Mifare: Can't select card (ALL)");
+ break;
+ }
+ switch (card_info.uidlen) {
+ case 4 : cascade_levels = 1; break;
+ case 7 : cascade_levels = 2; break;
+ case 10: cascade_levels = 3; break;
+ default: break;
+ }
+ have_uid = TRUE;
+ } else { // no need for anticollision. We can directly select the card
+ if(!iso14443a_select_card(uid, NULL, &cuid, false, cascade_levels)) {
+ if (MF_DBGLEVEL >= 4) Dbprintf("Mifare: Can't select card (UID)");
+ continue;
+ }
}
- sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles;
+ // Sending timeslot of ISO14443a frame
+ sync_time = (sync_time & 0xfffffff8 ) + sync_cycles + catch_up_cycles;
catch_up_cycles = 0;
// if we missed the sync time already, advance to the next nonce repeat
- while(GetCountSspClk() > sync_time) {
+ while( GetCountSspClk() > sync_time) {
++elapsed_prng_sequences;
- sync_time = (sync_time & 0xfffffff8) + sync_cycles;
- }
- // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked)
- ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
+ sync_time = (sync_time & 0xfffffff8 ) + sync_cycles;
+ }
- // Receive the (4 Byte) "random" nonce
+ // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked)
+ ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
+
+ // Receive the (4 Byte) "random" nonce from TAG
if (!ReaderReceive(receivedAnswer, receivedAnswerPar))
continue;
- // Transmit reader nonce with fake par
- ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
-
previous_nt = nt;
nt = bytes_to_num(receivedAnswer, 4);
- if (first_try && previous_nt && !nt_attacked) { // we didn't calibrate our clock yet
- int nt_distance = dist_nt(previous_nt, nt);
+ // Transmit reader nonce with fake par
+ ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
+
+ // we didn't calibrate our clock yet,
+ // iceman: has to be calibrated every time.
+ if (previous_nt && !nt_attacked) {
+
+ nt_distance = dist_nt(previous_nt, nt);
+
+ // if no distance between, then we are in sync.
if (nt_distance == 0) {
nt_attacked = nt;
} else {
if (nt_distance == -99999) { // invalid nonce received
- unexpected_random++;
+ ++unexpected_random;
if (unexpected_random > MAX_UNEXPECTED_RANDOM) {
isOK = -3; // Card has an unpredictable PRNG. Give up
break;
- } else {
+ } else {
+ if (sync_cycles <= 0) sync_cycles += PRNG_SEQUENCE_LENGTH;
+ LED_B_OFF();
continue; // continue trying...
}
}
if (++sync_tries > MAX_SYNC_TRIES) {
- if (strategy > MAX_STRATEGY || MF_DBGLEVEL < 3) {
- isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly
- break;
- } else {
- continue;
- }
+ isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly
+ break;
}
sync_cycles = (sync_cycles - nt_distance)/elapsed_prng_sequences;
+
if (sync_cycles <= 0)
sync_cycles += PRNG_SEQUENCE_LENGTH;
- if (MF_DBGLEVEL >= 3)
+ if (MF_DBGLEVEL >= 4)
Dbprintf("calibrating in cycle %d. nt_distance=%d, elapsed_prng_sequences=%d, new sync_cycles: %d\n", i, nt_distance, elapsed_prng_sequences, sync_cycles);
+ LED_B_OFF();
continue;
}
}
+ LED_B_OFF();
- if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again...
+ if ( (nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again...
- catch_up_cycles = -dist_nt(nt_attacked, nt);
+ catch_up_cycles = ABS(dist_nt(nt_attacked, nt));
if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one.
catch_up_cycles = 0;
continue;
- }
-
+ }
// average?
catch_up_cycles /= elapsed_prng_sequences;
}
if (consecutive_resyncs < 3) {
- if (MF_DBGLEVEL >= 3)
- Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, -catch_up_cycles, consecutive_resyncs);
+ if (MF_DBGLEVEL >= 4)
+ Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, catch_up_cycles, consecutive_resyncs);
} else {
sync_cycles += catch_up_cycles;
- if (MF_DBGLEVEL >= 3)
- Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles);
+ if (MF_DBGLEVEL >= 4)
+ Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, catch_up_cycles, sync_cycles);
last_catch_up = 0;
catch_up_cycles = 0;
par_low = par[0] & 0xE0; // there is no need to check all parities for other nt_diff. Parity Bits for mf_nr_ar[0..2] won't change
par_list[nt_diff] = SwapBits(par[0], 8);
- ks_list[nt_diff] = receivedAnswer[0] ^ 0x05;
+ ks_list[nt_diff] = receivedAnswer[0] ^ 0x05; // xor with NACK value to get keystream
// Test if the information is complete
if (nt_diff == 0x07) {
par[0] = par_low;
} else {
+ // No NACK.
if (nt_diff == 0 && first_try) {
par[0]++;
if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK.
break;
}
} else {
+ // Why this?
par[0] = ((par[0] & 0x1F) + 1) | par_low;
}
}
+ // reset the resyncs since we got a complete transaction on right time.
consecutive_resyncs = 0;
- }
+ } // end for loop
mf_nr_ar[3] &= 0x1F;
- WDT_HIT();
+ if (MF_DBGLEVEL >= 4) Dbprintf("Number of sent auth requestes: %u", i);
- // reset sync_time.
- if ( isOK == 1) {
- sync_time = 0;
- sync_cycles = 0;
- mf_nr_ar3 = 0;
- nt_attacked = 0;
- par[0] = 0;
- }
-
- byte_t buf[28] = {0x00};
- memcpy(buf + 0, uid, 4);
+ uint8_t buf[28] = {0x00};
+ memset(buf, 0x00, sizeof(buf));
+ num_to_bytes(cuid, 4, buf);
num_to_bytes(nt, 4, buf + 4);
memcpy(buf + 8, par_list, 8);
memcpy(buf + 16, ks_list, 8);
memcpy(buf + 24, mf_nr_ar, 4);
- cmd_send(CMD_ACK,isOK,0,0,buf,28);
+ cmd_send(CMD_ACK, isOK, 0, 0, buf, sizeof(buf) );
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
set_tracing(FALSE);
}
+
/**
*MIFARE 1K simulate.
*
*@param flags :
- * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
- * 4B_FLAG_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
- * 7B_FLAG_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
- * FLAG_NR_AR_ATTACK - means we should collect NR_AR responses for bruteforcing later
+ * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
+ * FLAG_4B_UID_IN_DATA - use 4-byte UID in the data-section
+ * FLAG_7B_UID_IN_DATA - use 7-byte UID in the data-section
+ * FLAG_10B_UID_IN_DATA - use 10-byte UID in the data-section
+ * FLAG_UID_IN_EMUL - use 4-byte UID from emulator memory
+ * FLAG_NR_AR_ATTACK - collect NR_AR responses for bruteforcing later
*@param exitAfterNReads, exit simulation after n blocks have been read, 0 is inifite
*/
-void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain)
-{
+void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain) {
+
+ // init pseudorand
+ fast_prand( GetTickCount() );
+
int cardSTATE = MFEMUL_NOFIELD;
- int _7BUID = 0;
+ int _UID_LEN = 0; // 4, 7, 10
int vHf = 0; // in mV
- int res;
+ int res = 0;
uint32_t selTimer = 0;
uint32_t authTimer = 0;
uint16_t len = 0;
uint8_t cardWRBL = 0;
uint8_t cardAUTHSC = 0;
uint8_t cardAUTHKEY = 0xff; // no authentication
-// uint32_t cardRr = 0;
uint32_t cuid = 0;
- //uint32_t rn_enc = 0;
uint32_t ans = 0;
uint32_t cardINTREG = 0;
uint8_t cardINTBLOCK = 0;
struct Crypto1State mpcs = {0, 0};
struct Crypto1State *pcs;
pcs = &mpcs;
- uint32_t numReads = 0;//Counts numer of times reader read a block
+ uint32_t numReads = 0; // Counts numer of times reader read a block
uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE] = {0x00};
uint8_t response[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t response_par[MAX_MIFARE_PARITY_SIZE] = {0x00};
- uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID
- uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
- uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
- uint8_t rSAK[] = {0x08, 0xb6, 0xdd}; // Mifare Classic
- //uint8_t rSAK[] = {0x09, 0x3f, 0xcc }; // Mifare Mini
- uint8_t rSAK1[] = {0x04, 0xda, 0x17};
-
- //uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};
- uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};
+ uint8_t atqa[] = {0x04, 0x00}; // Mifare classic 1k
+ uint8_t sak_4[] = {0x0C, 0x00, 0x00}; // CL1 - 4b uid
+ uint8_t sak_7[] = {0x0C, 0x00, 0x00}; // CL2 - 7b uid
+ uint8_t sak_10[] = {0x0C, 0x00, 0x00}; // CL3 - 10b uid
+ // uint8_t sak[] = {0x09, 0x3f, 0xcc }; // Mifare Mini
+
+ uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
+ uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
+ uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
+
+ // TAG Nonce - Authenticate response
+ uint8_t rAUTH_NT[4];
+ uint32_t nonce = prand();
+ num_to_bytes(nonce, 4, rAUTH_NT);
+
+ // uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};// nonce from nested? why this?
uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-
- //Here, we collect UID1,UID2,NT,AR,NR,0,0,NT2,AR2,NR2
+
+ // Here, we collect CUID, NT, NR, AR, CUID2, NT2, NR2, AR2
// This can be used in a reader-only attack.
- // (it can also be retrieved via 'hf 14a list', but hey...
- uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
- uint8_t ar_nr_collected = 0;
-
- // Authenticate response - nonce
- uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
+ nonces_t ar_nr_nonces[ATTACK_KEY_COUNT];
+ memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));
+
+ // -- Determine the UID
+ // Can be set from emulator memory or incoming data
+ // Length: 4,7,or 10 bytes
+ if ( (flags & FLAG_UID_IN_EMUL) == FLAG_UID_IN_EMUL)
+ emlGetMemBt(datain, 0, 10); // load 10bytes from EMUL to the datain pointer. to be used below.
- //-- Determine the UID
- // Can be set from emulator memory, incoming data
- // and can be 7 or 4 bytes long
- if (flags & FLAG_4B_UID_IN_DATA)
- {
- // 4B uid comes from data-portion of packet
- memcpy(rUIDBCC1,datain,4);
- rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-
- } else if (flags & FLAG_7B_UID_IN_DATA) {
- // 7B uid comes from data-portion of packet
- memcpy(&rUIDBCC1[1],datain,3);
- memcpy(rUIDBCC2, datain+3, 4);
- _7BUID = true;
- } else {
- // get UID from emul memory
- emlGetMemBt(receivedCmd, 7, 1);
- _7BUID = !(receivedCmd[0] == 0x00);
- if (!_7BUID) { // ---------- 4BUID
- emlGetMemBt(rUIDBCC1, 0, 4);
- } else { // ---------- 7BUID
- emlGetMemBt(&rUIDBCC1[1], 0, 3);
- emlGetMemBt(rUIDBCC2, 3, 4);
- }
- }
-
- // save uid.
- ar_nr_responses[0*5] = bytes_to_num(rUIDBCC1+1, 3);
- if ( _7BUID )
- ar_nr_responses[0*5+1] = bytes_to_num(rUIDBCC2, 4);
-
- /*
- * Regardless of what method was used to set the UID, set fifth byte and modify
- * the ATQA for 4 or 7-byte UID
- */
- rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
- if (_7BUID) {
- rATQA[0] = 0x44;
- rUIDBCC1[0] = 0x88;
- rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
- rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
+ if ( (flags & FLAG_4B_UID_IN_DATA) == FLAG_4B_UID_IN_DATA) {
+ memcpy(rUIDBCC1, datain, 4);
+ _UID_LEN = 4;
+ } else if ( (flags & FLAG_7B_UID_IN_DATA) == FLAG_7B_UID_IN_DATA) {
+ memcpy(&rUIDBCC1[1], datain, 3);
+ memcpy( rUIDBCC2, datain+3, 4);
+ _UID_LEN = 7;
+ } else if ( (flags & FLAG_10B_UID_IN_DATA) == FLAG_10B_UID_IN_DATA) {
+ memcpy(&rUIDBCC1[1], datain, 3);
+ memcpy(&rUIDBCC2[1], datain+3, 3);
+ memcpy( rUIDBCC3, datain+6, 4);
+ _UID_LEN = 10;
}
- if (MF_DBGLEVEL >= 1) {
- if (!_7BUID) {
- Dbprintf("4B UID: %02x%02x%02x%02x",
- rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3]);
- } else {
- Dbprintf("7B UID: (%02x)%02x%02x%02x%02x%02x%02x%02x",
- rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3],
- rUIDBCC2[0], rUIDBCC2[1] ,rUIDBCC2[2], rUIDBCC2[3]);
- }
+ switch (_UID_LEN) {
+ case 4:
+ sak_4[0] &= 0xFB;
+ // save CUID
+ cuid = bytes_to_num(rUIDBCC1, 4);
+ // BCC
+ rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+ if (MF_DBGLEVEL >= 2) {
+ Dbprintf("4B UID: %02x%02x%02x%02x",
+ rUIDBCC1[0],
+ rUIDBCC1[1],
+ rUIDBCC1[2],
+ rUIDBCC1[3]
+ );
+ }
+ break;
+ case 7:
+ atqa[0] |= 0x40;
+ sak_7[0] &= 0xFB;
+ // save CUID
+ cuid = bytes_to_num(rUIDBCC2, 4);
+ // CascadeTag, CT
+ rUIDBCC1[0] = 0x88;
+ // BCC
+ rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+ rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
+ if (MF_DBGLEVEL >= 2) {
+ Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
+ rUIDBCC1[1],
+ rUIDBCC1[2],
+ rUIDBCC1[3],
+ rUIDBCC2[0],
+ rUIDBCC2[1],
+ rUIDBCC2[2],
+ rUIDBCC2[3]
+ );
+ }
+ break;
+ case 10:
+ atqa[0] |= 0x80;
+ sak_10[0] &= 0xFB;
+ // save CUID
+ cuid = bytes_to_num(rUIDBCC3, 4);
+ // CascadeTag, CT
+ rUIDBCC1[0] = 0x88;
+ rUIDBCC2[0] = 0x88;
+ // BCC
+ rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+ rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
+ rUIDBCC3[4] = rUIDBCC3[0] ^ rUIDBCC3[1] ^ rUIDBCC3[2] ^ rUIDBCC3[3];
+
+ if (MF_DBGLEVEL >= 2) {
+ Dbprintf("10B UID: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
+ rUIDBCC1[1],
+ rUIDBCC1[2],
+ rUIDBCC1[3],
+ rUIDBCC2[1],
+ rUIDBCC2[2],
+ rUIDBCC2[3],
+ rUIDBCC3[0],
+ rUIDBCC3[1],
+ rUIDBCC3[2],
+ rUIDBCC3[3]
+ );
+ }
+ break;
+ default:
+ break;
}
-
+ // calc some crcs
+ ComputeCrc14443(CRC_14443_A, sak_4, 1, &sak_4[1], &sak_4[2]);
+ ComputeCrc14443(CRC_14443_A, sak_7, 1, &sak_7[1], &sak_7[2]);
+ ComputeCrc14443(CRC_14443_A, sak_10, 1, &sak_10[1], &sak_10[2]);
+
// We need to listen to the high-frequency, peak-detected path.
iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
// free eventually allocated BigBuf memory but keep Emulator Memory
BigBuf_free_keep_EM();
-
- // clear trace
clear_trace();
set_tracing(TRUE);
-
bool finished = FALSE;
while (!BUTTON_PRESS() && !finished && !usb_poll_validate_length()) {
WDT_HIT();
LED_A_ON();
}
}
- if(cardSTATE == MFEMUL_NOFIELD) continue;
+ if (cardSTATE == MFEMUL_NOFIELD) continue;
- //Now, get data
+ // Now, get data
res = EmGetCmd(receivedCmd, &len, receivedCmd_par);
if (res == 2) { //Field is off!
cardSTATE = MFEMUL_NOFIELD;
LEDsoff();
continue;
} else if (res == 1) {
- break; //return value 1 means button press
+ break; // return value 1 means button press
}
// REQ or WUP request in ANY state and WUP in HALTED state
- if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) {
+ // this if-statement doesn't match the specification above. (iceman)
+ if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
selTimer = GetTickCount();
- EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52));
+ EmSendCmdEx(atqa, sizeof(atqa), (receivedCmd[0] == ISO14443A_CMD_WUPA));
cardSTATE = MFEMUL_SELECT1;
-
- // init crypto block
- LED_B_OFF();
- LED_C_OFF();
crypto1_destroy(pcs);
cardAUTHKEY = 0xff;
+ LEDsoff();
+ nonce = prand();
continue;
}
break;
}
case MFEMUL_SELECT1:{
- // select all
- if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) {
+ if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
if (MF_DBGLEVEL >= 4) Dbprintf("SELECT ALL received");
EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
break;
}
-
- if (MF_DBGLEVEL >= 4 && len == 9 && receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 )
- {
- Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
- }
// select card
if (len == 9 &&
- (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
- EmSendCmd(_7BUID?rSAK1:rSAK, _7BUID?sizeof(rSAK1):sizeof(rSAK));
- cuid = bytes_to_num(rUIDBCC1, 4);
- if (!_7BUID) {
- cardSTATE = MFEMUL_WORK;
- LED_B_ON();
- if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
- break;
- } else {
- cardSTATE = MFEMUL_SELECT2;
+ ( receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT &&
+ receivedCmd[1] == 0x70 &&
+ memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
+
+ // SAK 4b
+ EmSendCmd(sak_4, sizeof(sak_4));
+ switch(_UID_LEN){
+ case 4:
+ cardSTATE = MFEMUL_WORK;
+ LED_B_ON();
+ if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
+ continue;
+ case 7:
+ case 10:
+ cardSTATE = MFEMUL_SELECT2;
+ continue;
+ default:break;
+ }
+ } else {
+ cardSTATE_TO_IDLE();
+ }
+ break;
+ }
+ case MFEMUL_SELECT2:{
+ if (!len) {
+ LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
+ break;
+ }
+ if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
+ EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
+ break;
+ }
+ if (len == 9 &&
+ (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 &&
+ receivedCmd[1] == 0x70 &&
+ memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0) ) {
+
+ EmSendCmd(sak_7, sizeof(sak_7));
+ switch(_UID_LEN){
+ case 7:
+ cardSTATE = MFEMUL_WORK;
+ LED_B_ON();
+ if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
+ continue;
+ case 10:
+ cardSTATE = MFEMUL_SELECT3;
+ continue;
+ default:break;
}
+ }
+ cardSTATE_TO_IDLE();
+ break;
+ }
+ case MFEMUL_SELECT3:{
+ if (!len) {
+ LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
+ break;
+ }
+ if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && receivedCmd[1] == 0x20)) {
+ EmSendCmd(rUIDBCC3, sizeof(rUIDBCC3));
+ break;
}
+ if (len == 9 &&
+ (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 &&
+ receivedCmd[1] == 0x70 &&
+ memcmp(&receivedCmd[2], rUIDBCC3, 4) == 0) ) {
+
+ EmSendCmd(sak_10, sizeof(sak_10));
+ cardSTATE = MFEMUL_WORK;
+ LED_B_ON();
+ if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol3 time: %d", GetTickCount() - selTimer);
+ break;
+ }
+ cardSTATE_TO_IDLE();
break;
}
case MFEMUL_AUTH1:{
break;
}
- uint32_t ar = bytes_to_num(receivedCmd, 4);
- uint32_t nr = bytes_to_num(&receivedCmd[4], 4);
-
- //Collect AR/NR
- //if(ar_nr_collected < 2 && cardAUTHSC == 2){
- if(ar_nr_collected < 2) {
- if(ar_nr_responses[2] != ar) {
- // Avoid duplicates... probably not necessary, ar should vary.
- //ar_nr_responses[ar_nr_collected*5] = 0;
- //ar_nr_responses[ar_nr_collected*5+1] = 0;
- ar_nr_responses[ar_nr_collected*5+2] = nonce;
- ar_nr_responses[ar_nr_collected*5+3] = nr;
- ar_nr_responses[ar_nr_collected*5+4] = ar;
- ar_nr_collected++;
- }
- // Interactive mode flag, means we need to send ACK
- if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2)
- finished = true;
- }
+ uint32_t nr = bytes_to_num(receivedCmd, 4);
+ uint32_t ar = bytes_to_num(&receivedCmd[4], 4);
+
+ // Collect AR/NR per keytype & sector
+ if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
+
+ int8_t index = -1;
+ int8_t empty = -1;
+ for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ // find which index to use
+ if ( (cardAUTHSC == ar_nr_nonces[i].sector) && (cardAUTHKEY == ar_nr_nonces[i].keytype))
+ index = i;
+
+ // keep track of empty slots.
+ if ( ar_nr_nonces[i].state == EMPTY)
+ empty = i;
+ }
+ // if no empty slots. Choose first and overwrite.
+ if ( index == -1 ) {
+ if ( empty == -1 ) {
+ index = 0;
+ ar_nr_nonces[index].state = EMPTY;
+ } else {
+ index = empty;
+ }
+ }
- // --- crypto
- //crypto1_word(pcs, ar , 1);
- //cardRr = nr ^ crypto1_word(pcs, 0, 0);
+ switch(ar_nr_nonces[index].state) {
+ case EMPTY: {
+ // first nonce collect
+ ar_nr_nonces[index].cuid = cuid;
+ ar_nr_nonces[index].sector = cardAUTHSC;
+ ar_nr_nonces[index].keytype = cardAUTHKEY;
+ ar_nr_nonces[index].nonce = nonce;
+ ar_nr_nonces[index].nr = nr;
+ ar_nr_nonces[index].ar = ar;
+ ar_nr_nonces[index].state = FIRST;
+ break;
+ }
+ case FIRST : {
+ // second nonce collect
+ ar_nr_nonces[index].nonce2 = nonce;
+ ar_nr_nonces[index].nr2 = nr;
+ ar_nr_nonces[index].ar2 = ar;
+ ar_nr_nonces[index].state = SECOND;
+
+ // send to client
+ cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
+
+ ar_nr_nonces[index].state = EMPTY;
+ ar_nr_nonces[index].sector = 0;
+ ar_nr_nonces[index].keytype = 0;
+ break;
+ }
+ default: break;
+ }
+ }
+ crypto1_word(pcs, nr , 1);
+ uint32_t cardRr = ar ^ crypto1_word(pcs, 0, 0);
+
//test if auth OK
- //if (cardRr != prng_successor(nonce, 64)){
+ if (cardRr != prng_successor(nonce, 64)){
- //if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
- // cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
- // cardRr, prng_successor(nonce, 64));
+ if (MF_DBGLEVEL >= 3) {
+ Dbprintf("AUTH FAILED for sector %d with key %c. [nr=%08x cardRr=%08x] [nt=%08x succ=%08x]"
+ , cardAUTHSC
+ , (cardAUTHKEY == 0) ? 'A' : 'B'
+ , nr
+ , cardRr
+ , nonce // nt
+ , prng_successor(nonce, 64)
+ );
+ }
// Shouldn't we respond anything here?
// Right now, we don't nack or anything, which causes the
// reader to do a WUPA after a while. /Martin
// -- which is the correct response. /piwi
- //cardSTATE_TO_IDLE();
- //LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
- //break;
- //}
-
+ cardSTATE_TO_IDLE();
+ LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
+ break;
+ }
+
ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-
num_to_bytes(ans, 4, rAUTH_AT);
- // --- crypto
EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
LED_C_ON();
- cardSTATE = MFEMUL_WORK;
- if (MF_DBGLEVEL >= 4) {
+
+ if (MF_DBGLEVEL >= 1) {
Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d",
cardAUTHSC,
cardAUTHKEY == 0 ? 'A' : 'B',
GetTickCount() - authTimer
);
}
- break;
- }
- case MFEMUL_SELECT2:{
- if (!len) {
- LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
- break;
- }
- if (len == 2 && (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x20)) {
- EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
- break;
- }
-
- // select 2 card
- if (len == 9 &&
- (receivedCmd[0] == 0x95 &&
- receivedCmd[1] == 0x70 &&
- memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0) ) {
- EmSendCmd(rSAK, sizeof(rSAK));
- cuid = bytes_to_num(rUIDBCC2, 4);
- cardSTATE = MFEMUL_WORK;
- LED_B_ON();
- if (MF_DBGLEVEL >= 4) Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
- break;
- }
-
- // i guess there is a command). go into the work state.
- if (len != 4) {
- LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
- break;
- }
cardSTATE = MFEMUL_WORK;
- //goto lbWORK;
- //intentional fall-through to the next case-stmt
+ break;
}
-
case MFEMUL_WORK:{
if (len == 0) {
LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
- }
-
+ }
bool encrypted_data = (cardAUTHKEY != 0xFF) ;
- // decrypt seqence
if(encrypted_data)
mf_crypto1_decrypt(pcs, receivedCmd, len);
- if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
+ if (len == 4 && (receivedCmd[0] == MIFARE_AUTH_KEYA ||
+ receivedCmd[0] == MIFARE_AUTH_KEYB) ) {
+
authTimer = GetTickCount();
- cardAUTHSC = receivedCmd[1] / 4; // received block num
- cardAUTHKEY = receivedCmd[0] - 0x60;
- crypto1_destroy(pcs);//Added by martin
+ cardAUTHSC = receivedCmd[1] / 4; // received block -> sector
+ cardAUTHKEY = receivedCmd[0] & 0x1;
+ crypto1_destroy(pcs);
+
+ // load key into crypto
crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
- if (!encrypted_data) { // first authentication
- if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
-
- crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
- num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
- } else { // nested authentication
- if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
+ if (!encrypted_data) {
+ // first authentication
+ // Update crypto state init (UID ^ NONCE)
+ crypto1_word(pcs, cuid ^ nonce, 0);
+ num_to_bytes(nonce, 4, rAUTH_AT);
+ } else {
+ // nested authentication
ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0);
num_to_bytes(ans, 4, rAUTH_AT);
+
+ if (MF_DBGLEVEL >= 3) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %c", receivedCmd[1], receivedCmd[1], cardAUTHKEY == 0 ? 'A' : 'B');
}
EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
- //Dbprintf("Sending rAUTH %02x%02x%02x%02x", rAUTH_AT[0],rAUTH_AT[1],rAUTH_AT[2],rAUTH_AT[3]);
cardSTATE = MFEMUL_AUTH1;
break;
}
break;
}
- if(receivedCmd[0] == 0x30 // read block
- || receivedCmd[0] == 0xA0 // write block
- || receivedCmd[0] == 0xC0 // inc
- || receivedCmd[0] == 0xC1 // dec
- || receivedCmd[0] == 0xC2 // restore
- || receivedCmd[0] == 0xB0) { // transfer
+ if ( receivedCmd[0] == ISO14443A_CMD_READBLOCK ||
+ receivedCmd[0] == ISO14443A_CMD_WRITEBLOCK ||
+ receivedCmd[0] == MIFARE_CMD_INC ||
+ receivedCmd[0] == MIFARE_CMD_DEC ||
+ receivedCmd[0] == MIFARE_CMD_RESTORE ||
+ receivedCmd[0] == MIFARE_CMD_TRANSFER ) {
+
if (receivedCmd[1] >= 16 * 4) {
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate (0x%02) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
}
}
// read block
- if (receivedCmd[0] == 0x30) {
- if (MF_DBGLEVEL >= 4) Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]);
+ if (receivedCmd[0] == ISO14443A_CMD_READBLOCK) {
+ if (MF_DBGLEVEL >= 4) Dbprintf("Reader reading block %d (0x%02x)", receivedCmd[1], receivedCmd[1]);
emlGetMem(response, receivedCmd[1], 1);
AppendCrc14443a(response, 16);
break;
}
// write block
- if (receivedCmd[0] == 0xA0) {
- if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd[1],receivedCmd[1]);
+ if (receivedCmd[0] == ISO14443A_CMD_WRITEBLOCK) {
+ if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)", receivedCmd[1], receivedCmd[1]);
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
cardSTATE = MFEMUL_WRITEBL2;
cardWRBL = receivedCmd[1];
break;
}
// increment, decrement, restore
- if (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2) {
- if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
+ if ( receivedCmd[0] == MIFARE_CMD_INC ||
+ receivedCmd[0] == MIFARE_CMD_DEC ||
+ receivedCmd[0] == MIFARE_CMD_RESTORE) {
+
+ if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0], receivedCmd[1], receivedCmd[1]);
+
if (emlCheckValBl(receivedCmd[1])) {
if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
break;
}
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
- if (receivedCmd[0] == 0xC1)
- cardSTATE = MFEMUL_INTREG_INC;
- if (receivedCmd[0] == 0xC0)
- cardSTATE = MFEMUL_INTREG_DEC;
- if (receivedCmd[0] == 0xC2)
- cardSTATE = MFEMUL_INTREG_REST;
+ if (receivedCmd[0] == MIFARE_CMD_INC) cardSTATE = MFEMUL_INTREG_INC;
+ if (receivedCmd[0] == MIFARE_CMD_DEC) cardSTATE = MFEMUL_INTREG_DEC;
+ if (receivedCmd[0] == MIFARE_CMD_RESTORE) cardSTATE = MFEMUL_INTREG_REST;
cardWRBL = receivedCmd[1];
break;
}
// transfer
- if (receivedCmd[0] == 0xB0) {
- if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
+ if (receivedCmd[0] == MIFARE_CMD_TRANSFER) {
+ if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)", receivedCmd[0], receivedCmd[1], receivedCmd[1]);
if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1]))
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
else
break;
}
// halt
- if (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00) {
+ if (receivedCmd[0] == ISO14443A_CMD_HALT && receivedCmd[1] == 0x00) {
LED_B_OFF();
LED_C_OFF();
cardSTATE = MFEMUL_HALTED;
break;
}
// RATS
- if (receivedCmd[0] == 0xe0) {//RATS
+ if (receivedCmd[0] == ISO14443A_CMD_RATS) {
EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
break;
}
}
break;
}
-
case MFEMUL_INTREG_INC:{
mf_crypto1_decrypt(pcs, receivedCmd, len);
memcpy(&ans, receivedCmd, 4);
}
}
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- LEDsoff();
-
- // Interactive mode flag, means we need to send ACK
- if(flags & FLAG_INTERACTIVE) {
- //May just aswell send the collected ar_nr in the response aswell
- uint8_t len = ar_nr_collected*5*4;
- cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len);
- }
-
- if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1 ) {
- if(ar_nr_collected > 1 ) {
- Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
- Dbprintf("../tools/mfkey/mfkey32 %06x%08x %08x %08x %08x %08x %08x",
- ar_nr_responses[0], // UID1
- ar_nr_responses[1], // UID2
- ar_nr_responses[2], // NT
- ar_nr_responses[3], // AR1
- ar_nr_responses[4], // NR1
- ar_nr_responses[8], // AR2
- ar_nr_responses[9] // NR2
- );
- Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x",
- ar_nr_responses[0], // UID1
- ar_nr_responses[1], // UID2
- ar_nr_responses[2], // NT1
- ar_nr_responses[3], // AR1
- ar_nr_responses[4], // NR1
- ar_nr_responses[7], // NT2
- ar_nr_responses[8], // AR2
- ar_nr_responses[9] // NR2
- );
- } else {
- Dbprintf("Failed to obtain two AR/NR pairs!");
- if(ar_nr_collected > 0 ) {
- Dbprintf("Only got these: UID=%06x%08x, nonce=%08x, AR1=%08x, NR1=%08x",
- ar_nr_responses[0], // UID1
- ar_nr_responses[1], // UID2
- ar_nr_responses[2], // NT
- ar_nr_responses[3], // AR1
- ar_nr_responses[4] // NR1
- );
- }
- }
- }
- if (MF_DBGLEVEL >= 1) Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
+ if (MF_DBGLEVEL >= 1)
+ Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
+ cmd_send(CMD_ACK,1,0,0,0,0); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LEDsoff();
set_tracing(FALSE);
}
//-----------------------------------------------------------------------------
// MIFARE sniffer.
//
+// if no activity for 2sec, it sends the collected data to the client.
//-----------------------------------------------------------------------------
+// "hf mf sniff"
void RAMFUNC SniffMifare(uint8_t param) {
- // param:
- // bit 0 - trigger from first card answer
- // bit 1 - trigger from first reader 7-bit request
+
LEDsoff();
- // init trace buffer
+ // free eventually allocated BigBuf memory
+ BigBuf_free(); BigBuf_Clear_ext(false);
clear_trace();
set_tracing(TRUE);
// The command (reader -> tag) that we're receiving.
- // The length of a received command will in most cases be no more than 18 bytes.
- // So 32 should be enough!
uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedCmdPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
- // free eventually allocated BigBuf memory
- BigBuf_free();
-
// allocate the DMA buffer, used to stream samples from the FPGA
+ // [iceman] is this sniffed data unsigned?
uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
uint8_t *data = dmaBuf;
uint8_t previous_data = 0;
// Set up the demodulator for the reader -> tag commands
UartInit(receivedCmd, receivedCmdPar);
- // Setup for the DMA.
- FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer.
+ // Setup and start DMA.
+ // set transfer address and number of bytes. Start transfer.
+ if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+ if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting");
+ return;
+ }
LED_D_OFF();
-
- // init sniffer
+
MfSniffInit();
// And now we loop, receiving samples.
- for(uint32_t sniffCounter = 0; TRUE; ) {
+ for(uint32_t sniffCounter = 0;; ) {
+
+ LED_A_ON();
+ WDT_HIT();
if(BUTTON_PRESS()) {
DbpString("cancelled by button");
break;
}
-
- LED_A_ON();
- WDT_HIT();
-
+
if ((sniffCounter & 0x0000FFFF) == 0) { // from time to time
// check if a transaction is completed (timeout after 2000ms).
// if yes, stop the DMA transfer and send what we have so far to the client
maxDataLen = 0;
ReaderIsActive = FALSE;
TagIsActive = FALSE;
- FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer.
+ // Setup and start DMA. set transfer address and number of bytes. Start transfer.
+ if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+ if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting");
+ return;
+ }
}
}
if (!AT91C_BASE_PDC_SSC->PDC_RCR) {
AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) dmaBuf;
AT91C_BASE_PDC_SSC->PDC_RCR = DMA_BUFFER_SIZE;
- Dbprintf("RxEmpty ERROR!!! data length:%d", dataLen); // temporary
+ Dbprintf("RxEmpty ERROR, data length:%d", dataLen); // temporary
}
// secondary buffer sets as primary, secondary buffer was stopped
if (!AT91C_BASE_PDC_SSC->PDC_RNCR) {
if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
- /* And ready to receive another command. */
UartInit(receivedCmd, receivedCmdPar);
-
- /* And also reset the demod code */
DemodReset();
}
ReaderIsActive = (Uart.state != STATE_UNSYNCD);
if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, FALSE)) break;
- // And ready to receive another response.
DemodReset();
-
- // And reset the Miller decoder including its (now outdated) input buffer
UartInit(receivedCmd, receivedCmdPar);
}
TagIsActive = (Demod.state != DEMOD_UNSYNCD);
data = dmaBuf;
} // main cycle
-
+
+ if (MF_DBGLEVEL >= 1) Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
+
FpgaDisableSscDma();
MfSniffEnd();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
- Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
set_tracing(FALSE);
}
projects / proxmark3-svn / blobdiff