//-----------------------------------------------------------------------------
+// Jonathan Westhues, split Nov 2006
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
// Routines to support ISO 14443. This includes both the reader software and
// the `fake tag' modes. At the moment only the Type B modulation is
// supported.
-// Jonathan Westhues, split Nov 2006
//-----------------------------------------------------------------------------
-#include <proxmark3.h>
+
+#include "proxmark3.h"
#include "apps.h"
-#include "iso14443crc.h"
+#include "util.h"
+#include "string.h"
+#include "iso14443crc.h"
-//static void GetSamplesFor14443(BOOL weTx, int n);
+//static void GetSamplesFor14443(int weTx, int n);
#define DEMOD_TRACE_SIZE 4096
#define READER_TAG_BUFFER_SIZE 2048
#define TAG_READER_BUFFER_SIZE 2048
-#define DMA_BUFFER_SIZE 1024
+#define DEMOD_DMA_BUFFER_SIZE 1024
//=============================================================================
// An ISO 14443 Type B tag. We listen for commands from the reader, using
// that here) so that they can be transmitted to the reader. Doesn't transmit
// them yet, just leaves them ready to send in ToSend[].
//-----------------------------------------------------------------------------
-static void CodeIso14443bAsTag(const BYTE *cmd, int len)
+static void CodeIso14443bAsTag(const uint8_t *cmd, int len)
{
int i;
for(i = 0; i < len; i++) {
int j;
- BYTE b = cmd[i];
+ uint8_t b = cmd[i];
// Start bit
ToSendStuffBit(0);
STATE_RECEIVING_DATA,
STATE_ERROR_WAIT
} state;
- WORD shiftReg;
+ uint16_t shiftReg;
int bitCnt;
int byteCnt;
int byteCntMax;
int posCnt;
- BYTE *output;
+ uint8_t *output;
} Uart;
/* Receive & handle a bit coming from the reader.
* Returns: true if we received a EOF
* false if we are still waiting for some more
*/
-static BOOL Handle14443UartBit(int bit)
+static int Handle14443UartBit(int bit)
{
switch(Uart.state) {
case STATE_UNSYNCD:
// Assume that we're called with the SSC (to the FPGA) and ADC path set
// correctly.
//-----------------------------------------------------------------------------
-static BOOL GetIso14443CommandFromReader(BYTE *received, int *len, int maxLen)
+static int GetIso14443CommandFromReader(uint8_t *received, int *len, int maxLen)
{
- BYTE mask;
+ uint8_t mask;
int i, bit;
// Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
AT91C_BASE_SSC->SSC_THR = 0x00;
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- BYTE b = (BYTE)AT91C_BASE_SSC->SSC_RHR;
+ uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
mask = 0x80;
for(i = 0; i < 8; i++, mask >>= 1) {
//-----------------------------------------------------------------------------
void SimulateIso14443Tag(void)
{
- static const BYTE cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };
- static const BYTE response1[] = {
+ static const uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };
+ static const uint8_t response1[] = {
0x50, 0x82, 0x0d, 0xe1, 0x74, 0x20, 0x38, 0x19, 0x22,
0x00, 0x21, 0x85, 0x5e, 0xd7
};
- BYTE *resp;
+ uint8_t *resp;
int respLen;
- BYTE *resp1 = (((BYTE *)BigBuf) + 800);
+ uint8_t *resp1 = (((uint8_t *)BigBuf) + 800);
int resp1Len;
- BYTE *receivedCmd = (BYTE *)BigBuf;
+ uint8_t *receivedCmd = (uint8_t *)BigBuf;
int len;
int i;
cmdsRecvd = 0;
for(;;) {
- BYTE b1, b2;
+ uint8_t b1, b2;
if(!GetIso14443CommandFromReader(receivedCmd, &len, 100)) {
Dbprintf("button pressed, received %d commands", cmdsRecvd);
i = 0;
for(;;) {
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
- BYTE b = resp[i];
+ uint8_t b = resp[i];
AT91C_BASE_SSC->SSC_THR = b;
}
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- volatile BYTE b = (BYTE)AT91C_BASE_SSC->SSC_RHR;
+ volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
(void)b;
}
}
int thisBit;
int metric;
int metricN;
- WORD shiftReg;
- BYTE *output;
+ uint16_t shiftReg;
+ uint8_t *output;
int len;
int sumI;
int sumQ;
* false if we are still waiting for some more
*
*/
-static BOOL Handle14443SamplesDemod(int ci, int cq)
+static RAMFUNC int Handle14443SamplesDemod(int ci, int cq)
{
int v;
Demod.bitCount++;
if(Demod.bitCount == 10) {
- WORD s = Demod.shiftReg;
+ uint16_t s = Demod.shiftReg;
if((s & 0x200) && !(s & 0x001)) {
- BYTE b = (s >> 1);
+ uint8_t b = (s >> 1);
Demod.output[Demod.len] = b;
Demod.len++;
Demod.state = DEMOD_AWAITING_START_BIT;
* set to 'FALSE' if we behave like a snooper
* quiet: set to 'TRUE' to disable debug output
*/
-static void GetSamplesFor14443Demod(BOOL weTx, int n, BOOL quiet)
+static void GetSamplesFor14443Demod(int weTx, int n, int quiet)
{
int max = 0;
- BOOL gotFrame = FALSE;
+ int gotFrame = FALSE;
//# define DMA_BUFFER_SIZE 8
- SBYTE *dmaBuf;
+ int8_t *dmaBuf;
int lastRxCounter;
- SBYTE *upTo;
+ int8_t *upTo;
int ci, cq;
// Clear out the state of the "UART" that receives from the tag.
memset(BigBuf, 0x44, 400);
- Demod.output = (BYTE *)BigBuf;
+ Demod.output = (uint8_t *)BigBuf;
Demod.len = 0;
Demod.state = DEMOD_UNSYNCD;
// And the UART that receives from the reader
- Uart.output = (((BYTE *)BigBuf) + 1024);
+ Uart.output = (((uint8_t *)BigBuf) + 1024);
Uart.byteCntMax = 100;
Uart.state = STATE_UNSYNCD;
// Setup for the DMA.
- dmaBuf = (SBYTE *)(BigBuf + 32);
+ dmaBuf = (int8_t *)(BigBuf + 32);
upTo = dmaBuf;
- lastRxCounter = DMA_BUFFER_SIZE;
- FpgaSetupSscDma((BYTE *)dmaBuf, DMA_BUFFER_SIZE);
+ lastRxCounter = DEMOD_DMA_BUFFER_SIZE;
+ FpgaSetupSscDma((uint8_t *)dmaBuf, DEMOD_DMA_BUFFER_SIZE);
// Signal field is ON with the appropriate LED:
if (weTx) LED_D_ON(); else LED_D_OFF();
int behindBy = lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR;
if(behindBy > max) max = behindBy;
- while(((lastRxCounter-AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1))
+ while(((lastRxCounter-AT91C_BASE_PDC_SSC->PDC_RCR) & (DEMOD_DMA_BUFFER_SIZE-1))
> 2)
{
ci = upTo[0];
cq = upTo[1];
upTo += 2;
- if(upTo - dmaBuf > DMA_BUFFER_SIZE) {
- upTo -= DMA_BUFFER_SIZE;
- AT91C_BASE_PDC_SSC->PDC_RNPR = (DWORD)upTo;
- AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
+ if(upTo - dmaBuf > DEMOD_DMA_BUFFER_SIZE) {
+ upTo -= DEMOD_DMA_BUFFER_SIZE;
+ AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
+ AT91C_BASE_PDC_SSC->PDC_RNCR = DEMOD_DMA_BUFFER_SIZE;
}
lastRxCounter -= 2;
if(lastRxCounter <= 0) {
- lastRxCounter += DMA_BUFFER_SIZE;
+ lastRxCounter += DEMOD_DMA_BUFFER_SIZE;
}
samples += 2;
// samples from the FPGA, which we will later do some signal processing on,
// to get the bits.
//-----------------------------------------------------------------------------
-/*static void GetSamplesFor14443(BOOL weTx, int n)
+/*static void GetSamplesFor14443(int weTx, int n)
{
- BYTE *dest = (BYTE *)BigBuf;
+ uint8_t *dest = (uint8_t *)BigBuf;
int c;
FpgaWriteConfWord(
AT91C_BASE_SSC->SSC_THR = 0x43;
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- SBYTE b;
- b = (SBYTE)AT91C_BASE_SSC->SSC_RHR;
+ int8_t b;
+ b = (int8_t)AT91C_BASE_SSC->SSC_RHR;
- dest[c++] = (BYTE)b;
+ dest[c++] = (uint8_t)b;
if(c >= n) {
break;
c++;
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- volatile DWORD r = AT91C_BASE_SSC->SSC_RHR;
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
(void)r;
}
WDT_HIT();
}
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- volatile DWORD r = AT91C_BASE_SSC->SSC_RHR;
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
(void)r;
}
WDT_HIT();
// Code a layer 2 command (string of octets, including CRC) into ToSend[],
// so that it is ready to transmit to the tag using TransmitFor14443().
//-----------------------------------------------------------------------------
-void CodeIso14443bAsReader(const BYTE *cmd, int len)
+void CodeIso14443bAsReader(const uint8_t *cmd, int len)
{
int i, j;
- BYTE b;
+ uint8_t b;
ToSendReset();
// The command name is misleading, it actually decodes the reponse in HEX
// into the output buffer (read the result using hexsamples, not hisamples)
//-----------------------------------------------------------------------------
-void AcquireRawAdcSamplesIso14443(DWORD parameter)
+void AcquireRawAdcSamplesIso14443(uint32_t parameter)
{
- BYTE cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };
+ uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };
// Make sure that we start from off, since the tags are stateful;
// confusing things will happen if we don't reset them between reads.
//
// I tried to be systematic and check every answer of the tag, every CRC, etc...
//-----------------------------------------------------------------------------
-void ReadSRI512Iso14443(DWORD parameter)
+void ReadSRI512Iso14443(uint32_t parameter)
{
ReadSTMemoryIso14443(parameter,0x0F);
}
-void ReadSRIX4KIso14443(DWORD parameter)
+void ReadSRIX4KIso14443(uint32_t parameter)
{
ReadSTMemoryIso14443(parameter,0x7F);
}
-void ReadSTMemoryIso14443(DWORD parameter,DWORD dwLast)
+void ReadSTMemoryIso14443(uint32_t parameter,uint32_t dwLast)
{
- BYTE i = 0x00;
+ uint8_t i = 0x00;
// Make sure that we start from off, since the tags are stateful;
// confusing things will happen if we don't reset them between reads.
SpinDelay(200);
// First command: wake up the tag using the INITIATE command
- BYTE cmd1[] = { 0x06, 0x00, 0x97, 0x5b};
+ uint8_t cmd1[] = { 0x06, 0x00, 0x97, 0x5b};
CodeIso14443bAsReader(cmd1, sizeof(cmd1));
TransmitFor14443();
// LED_A_ON();
* 0-4095 : Demodulated samples receive (4096 bytes) - DEMOD_TRACE_SIZE
* 4096-6143 : Last Received command, 2048 bytes (reader->tag) - READER_TAG_BUFFER_SIZE
* 6144-8191 : Last Received command, 2048 bytes(tag->reader) - TAG_READER_BUFFER_SIZE
- * 8192-9215 : DMA Buffer, 1024 bytes (samples) - DMA_BUFFER_SIZE
+ * 8192-9215 : DMA Buffer, 1024 bytes (samples) - DEMOD_DMA_BUFFER_SIZE
*/
-void SnoopIso14443(void)
+void RAMFUNC SnoopIso14443(void)
{
// 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
// response from the tag.
- BOOL triggered = FALSE;
+ int triggered = TRUE;
// The command (reader -> tag) that we're working on receiving.
- BYTE *receivedCmd = (BYTE *)(BigBuf) + DEMOD_TRACE_SIZE;
+ uint8_t *receivedCmd = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE;
// The response (tag -> reader) that we're working on receiving.
- BYTE *receivedResponse = (BYTE *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE;
+ uint8_t *receivedResponse = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE;
// As we receive stuff, we copy it from receivedCmd or receivedResponse
// into trace, along with its length and other annotations.
- BYTE *trace = (BYTE *)BigBuf;
+ uint8_t *trace = (uint8_t *)BigBuf;
int traceLen = 0;
// The DMA buffer, used to stream samples from the FPGA.
- SBYTE *dmaBuf = (SBYTE *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE + TAG_READER_BUFFER_SIZE;
+ int8_t *dmaBuf = (int8_t *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE + TAG_READER_BUFFER_SIZE;
int lastRxCounter;
- SBYTE *upTo;
+ int8_t *upTo;
int ci, cq;
int maxBehindBy = 0;
Dbprintf(" Trace: %i bytes", DEMOD_TRACE_SIZE);
Dbprintf(" Reader -> tag: %i bytes", READER_TAG_BUFFER_SIZE);
Dbprintf(" tag -> Reader: %i bytes", TAG_READER_BUFFER_SIZE);
- Dbprintf(" DMA: %i bytes", DMA_BUFFER_SIZE);
-
- // Use a counter for blinking the LED
- long ledCount=0;
- long ledFlashAt=200000;
-
+ Dbprintf(" DMA: %i bytes", DEMOD_DMA_BUFFER_SIZE);
+
+
// And put the FPGA in the appropriate mode
// Signal field is off with the appropriate LED
LED_D_OFF();
// Setup for the DMA.
FpgaSetupSsc();
upTo = dmaBuf;
- lastRxCounter = DMA_BUFFER_SIZE;
- FpgaSetupSscDma((BYTE *)dmaBuf, DMA_BUFFER_SIZE);
+ lastRxCounter = DEMOD_DMA_BUFFER_SIZE;
+ FpgaSetupSscDma((uint8_t *)dmaBuf, DEMOD_DMA_BUFFER_SIZE);
+
+ LED_A_ON();
+
// And now we loop, receiving samples.
for(;;) {
- // Blink the LED while Snooping
- ledCount++;
- if (ledCount == ledFlashAt) {
- LED_D_ON();
- }
- if (ledCount >= 2*ledFlashAt) {
- LED_D_OFF();
- ledCount=0;
- }
-
int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
- (DMA_BUFFER_SIZE-1);
+ (DEMOD_DMA_BUFFER_SIZE-1);
if(behindBy > maxBehindBy) {
maxBehindBy = behindBy;
- if(behindBy > (DMA_BUFFER_SIZE-2)) { // TODO: understand whether we can increase/decrease as we want or not?
- Dbprintf("blew circular buffer! behindBy=%x", behindBy);
+ if(behindBy > (DEMOD_DMA_BUFFER_SIZE-2)) { // TODO: understand whether we can increase/decrease as we want or not?
+ Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
goto done;
}
}
cq = upTo[1];
upTo += 2;
lastRxCounter -= 2;
- if(upTo - dmaBuf > DMA_BUFFER_SIZE) {
- upTo -= DMA_BUFFER_SIZE;
- lastRxCounter += DMA_BUFFER_SIZE;
- AT91C_BASE_PDC_SSC->PDC_RNPR = (DWORD) upTo;
- AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
+ if(upTo - dmaBuf > DEMOD_DMA_BUFFER_SIZE) {
+ upTo -= DEMOD_DMA_BUFFER_SIZE;
+ lastRxCounter += DEMOD_DMA_BUFFER_SIZE;
+ AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
+ AT91C_BASE_PDC_SSC->PDC_RNCR = DEMOD_DMA_BUFFER_SIZE;
}
samples += 2;
#define HANDLE_BIT_IF_BODY \
if(triggered) { \
- ledFlashAt=30000; \
trace[traceLen++] = ((samples >> 0) & 0xff); \
trace[traceLen++] = ((samples >> 8) & 0xff); \
trace[traceLen++] = ((samples >> 16) & 0xff); \
trace[traceLen++] = Demod.len;
memcpy(trace+traceLen, receivedResponse, Demod.len);
traceLen += Demod.len;
- if(traceLen > DEMOD_TRACE_SIZE) {
+ if(traceLen > DEMOD_TRACE_SIZE) {
DbpString("Reached trace limit");
goto done;
}
triggered = TRUE;
+ LED_A_OFF();
+ LED_B_ON();
// And ready to receive another response.
memset(&Demod, 0, sizeof(Demod));
}
done:
- LED_D_OFF();
- AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+ LED_A_OFF();
+ LED_B_OFF();
+ LED_C_OFF();
+ AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
DbpString("Snoop statistics:");
- Dbprintf(" Max behind by: %i", maxBehindBy);
+ Dbprintf(" Max behind by: %i", maxBehindBy);
Dbprintf(" Uart State: %x", Uart.state);
Dbprintf(" Uart ByteCnt: %i", Uart.byteCnt);
Dbprintf(" Uart ByteCntMax: %i", Uart.byteCntMax);
projects / proxmark3-svn / blobdiff