// Low frequency EM4x commands
//-----------------------------------------------------------------------------
-#include <stdio.h>
-#include <string.h>
-#include <inttypes.h>
-#include "proxmark3.h"
-#include "ui.h"
-#include "util.h"
-#include "graph.h"
-#include "cmdparser.h"
-#include "cmddata.h"
-#include "cmdlf.h"
#include "cmdlfem4x.h"
-#include "lfdemod.h"
-char *global_em410xId;
+
+uint64_t g_em410xid = 0;
static int CmdHelp(const char *Cmd);
int CmdEMdemodASK(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
- int findone = (cmdp == '1') ? 1 : 0;
- UsbCommand c={CMD_EM410X_DEMOD};
- c.arg[0]=findone;
+ uint8_t findone = (cmdp == '1') ? 1 : 0;
+ UsbCommand c = {CMD_EM410X_DEMOD, {findone, 0, 0}};
SendCommand(&c);
return 0;
}
uint32_t hi=0;
uint64_t lo=0;
- if(!AskEm410xDemod("", &hi, &lo)) return 0;
+ if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
PrintAndLog("EM410x pattern found: ");
printEM410x(hi, lo);
if (hi){
PrintAndLog ("EM410x XL pattern found");
return 0;
}
- char id[12] = {0x00};
- sprintf(id, "%010llx",lo);
-
- global_em410xId = id;
+ g_em410xid = lo;
return 1;
}
+
+int usage_lf_em410x_sim(void) {
+ PrintAndLog("Simulating EM410x tag");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf em4x em410xsim [h] <uid> <clock>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h - this help");
+ PrintAndLog(" uid - uid (10 HEX symbols)");
+ PrintAndLog(" clock - clock (32|64) (optional)");
+ PrintAndLog("samples:");
+ PrintAndLog(" lf em4x em410xsim 0F0368568B");
+ PrintAndLog(" lf em4x em410xsim 0F0368568B 32");
+ return 0;
+}
+
// emulate an EM410X tag
int CmdEM410xSim(const char *Cmd)
{
int i, n, j, binary[4], parity[4];
+ uint8_t uid[5] = {0x00};
char cmdp = param_getchar(Cmd, 0);
- uint8_t uid[5] = {0x00};
+ if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim();
- if (cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: lf em4x 410xsim <UID>");
- PrintAndLog("");
- PrintAndLog(" sample: lf em4x 410xsim 0F0368568B");
- return 0;
- }
+ /* clock is 64 in EM410x tags */
+ uint8_t clock = 64;
if (param_gethex(Cmd, 0, uid, 10)) {
PrintAndLog("UID must include 10 HEX symbols");
return 0;
}
- PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
+ param_getdec(Cmd, 1, &clock);
+
+ PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock);
PrintAndLog("Press pm3-button to about simulation");
- /* clock is 64 in EM410x tags */
- int clock = 64;
-
/* clear our graph */
ClearGraph(0);
- /* write 9 start bits */
- for (i = 0; i < 9; i++)
- AppendGraph(0, clock, 1);
-
- /* for each hex char */
- parity[0] = parity[1] = parity[2] = parity[3] = 0;
- for (i = 0; i < 10; i++)
- {
- /* read each hex char */
- sscanf(&Cmd[i], "%1x", &n);
- for (j = 3; j >= 0; j--, n/= 2)
- binary[j] = n % 2;
-
- /* append each bit */
- AppendGraph(0, clock, binary[0]);
- AppendGraph(0, clock, binary[1]);
- AppendGraph(0, clock, binary[2]);
- AppendGraph(0, clock, binary[3]);
-
- /* append parity bit */
- AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
-
- /* keep track of column parity */
- parity[0] ^= binary[0];
- parity[1] ^= binary[1];
- parity[2] ^= binary[2];
- parity[3] ^= binary[3];
- }
+ /* write 9 start bits */
+ for (i = 0; i < 9; i++)
+ AppendGraph(0, clock, 1);
+
+ /* for each hex char */
+ parity[0] = parity[1] = parity[2] = parity[3] = 0;
+ for (i = 0; i < 10; i++)
+ {
+ /* read each hex char */
+ sscanf(&Cmd[i], "%1x", &n);
+ for (j = 3; j >= 0; j--, n/= 2)
+ binary[j] = n % 2;
+
+ /* append each bit */
+ AppendGraph(0, clock, binary[0]);
+ AppendGraph(0, clock, binary[1]);
+ AppendGraph(0, clock, binary[2]);
+ AppendGraph(0, clock, binary[3]);
+
+ /* append parity bit */
+ AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
+
+ /* keep track of column parity */
+ parity[0] ^= binary[0];
+ parity[1] ^= binary[1];
+ parity[2] ^= binary[2];
+ parity[3] ^= binary[3];
+ }
- /* parity columns */
- AppendGraph(0, clock, parity[0]);
- AppendGraph(0, clock, parity[1]);
- AppendGraph(0, clock, parity[2]);
- AppendGraph(0, clock, parity[3]);
+ /* parity columns */
+ AppendGraph(0, clock, parity[0]);
+ AppendGraph(0, clock, parity[1]);
+ AppendGraph(0, clock, parity[2]);
+ AppendGraph(0, clock, parity[3]);
- /* stop bit */
+ /* stop bit */
AppendGraph(1, clock, 0);
CmdLFSim("0"); //240 start_gap.
* rate gets lower, then grow the number of samples
* Changed by martin, 4000 x 4 = 16000,
* see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
-
*/
int CmdEM410xWatch(const char *Cmd)
{
}
CmdLFRead("s");
- getSamples("8192",true); //capture enough to get 2 full messages
+ getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
} while (!CmdEM410xRead(""));
return 0;
}
//currently only supports manchester modulations
+// todo: helptext
int CmdEM410xWatchnSpoof(const char *Cmd)
{
+ // loops if the captured ID was in XL-format.
CmdEM410xWatch(Cmd);
- PrintAndLog("# Replaying captured ID: %s",global_em410xId);
+ PrintAndLog("# Replaying captured ID: %llu", g_em410xid);
CmdLFaskSim("");
return 0;
}
{
uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
int card = 0xFF; // invalid card value
- unsigned int clock = 0; // invalid clock value
+ uint32_t clock = 0; // invalid clock value
sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
}
// Check Clock
- if (card == 1)
- {
// Default: 64
- if (clock == 0)
- clock = 64;
+ if (clock == 0)
+ clock = 64;
- // Allowed clock rates: 16, 32 and 64
- if ((clock != 16) && (clock != 32) && (clock != 64)) {
- PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
- return 0;
- }
- }
- else if (clock != 0)
- {
- PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
+ // Allowed clock rates: 16, 32, 40 and 64
+ if ((clock != 16) && (clock != 32) && (clock != 64) && (clock != 40)) {
+ PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32, 40 and 64.\n", clock);
return 0;
}
// provide for backwards-compatibility for older firmware, and to avoid
// having to add another argument to CMD_EM410X_WRITE_TAG, we just store
// the clock rate in bits 8-15 of the card value
- card = (card & 0xFF) | (((uint64_t)clock << 8) & 0xFF00);
- }
- else if (card == 0)
+ card = (card & 0xFF) | ((clock << 8) & 0xFF00);
+ } else if (card == 0) {
PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
- else {
+ card = (card & 0xFF) | ((clock << 8) & 0xFF00);
+ } else {
PrintAndLog("Error! Bad card type selected.\n");
return 0;
}
UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
SendCommand(&c);
-
return 0;
}
{
if (rows*cols>size) return false;
uint8_t colP=0;
- //assume last row is a parity row and do not test
+ //assume last col is a parity and do not test
for (uint8_t colNum = 0; colNum < cols-1; colNum++) {
for (uint8_t rowNum = 0; rowNum < rows; rowNum++) {
colP ^= BitStream[(rowNum*cols)+colNum];
uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
{
if (size<45) return 0;
+
uint32_t code = bytebits_to_byte(BitStream,8);
code = code<<8 | bytebits_to_byte(BitStream+9,8);
code = code<<8 | bytebits_to_byte(BitStream+18,8);
code = code<<8 | bytebits_to_byte(BitStream+27,8);
+
if (verbose || g_debugMode){
for (uint8_t i = 0; i<5; i++){
- if (i == 4) PrintAndLog("");
+ if (i == 4) PrintAndLog(""); //parity byte spacer
PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
BitStream[i*9],
BitStream[i*9+1],
else
PrintAndLog("Parity Failed");
}
- //PrintAndLog("Code: %08x",code);
return code;
}
-/* Read the transmitted data of an EM4x50 tag
+/* Read the transmitted data of an EM4x50 tag from the graphbuffer
* Format:
*
* XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
* is stored in the blocks defined in the control word First and Last
* Word Read values. UID is stored in block 32.
*/
+ //completed by Marshmellow
int EM4x50Read(const char *Cmd, bool verbose)
{
- uint8_t fndClk[]={0,8,16,32,40,50,64};
+ uint8_t fndClk[] = {8,16,32,40,50,64,128};
int clk = 0;
int invert = 0;
- sscanf(Cmd, "%i %i", &clk, &invert);
int tol = 0;
int i, j, startblock, skip, block, start, end, low, high, minClk;
- bool complete= false;
+ bool complete = false;
int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
- save_restoreGB(1);
uint32_t Code[6];
char tmp[6];
-
char tmp2[20];
- high= low= 0;
+ int phaseoff;
+ high = low = 0;
memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
-
+
+ // get user entry if any
+ sscanf(Cmd, "%i %i", &clk, &invert);
+
+ // save GraphBuffer - to restore it later
+ save_restoreGB(1);
+
// first get high and low values
- for (i = 0; i < GraphTraceLen; i++)
- {
+ for (i = 0; i < GraphTraceLen; i++) {
if (GraphBuffer[i] > high)
high = GraphBuffer[i];
else if (GraphBuffer[i] < low)
low = GraphBuffer[i];
}
- // populate a buffer with pulse lengths
- i= 0;
- j= 0;
- minClk= 255;
- while (i < GraphTraceLen)
- {
+ i = 0;
+ j = 0;
+ minClk = 255;
+ // get to first full low to prime loop and skip incomplete first pulse
+ while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
+ ++i;
+ while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
+ ++i;
+ skip = i;
+
+ // populate tmpbuff buffer with pulse lengths
+ while (i < GraphTraceLen) {
// measure from low to low
- while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
+ while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
++i;
start= i;
- while ((GraphBuffer[i] < high) && (i<GraphTraceLen))
+ while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
++i;
- while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
+ while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
++i;
if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
break;
}
tmpbuff[j++]= i - start;
- if (i-start < minClk) minClk = i-start;
+ if (i-start < minClk && i < GraphTraceLen) {
+ minClk = i - start;
+ }
}
// set clock
- if (!clk){
+ if (!clk) {
for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
tol = fndClk[clkCnt]/8;
- if (fndClk[clkCnt]-tol >= minClk) {
+ if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
clk=fndClk[clkCnt];
break;
}
}
+ if (!clk) {
+ PrintAndLog("ERROR: EM4x50 - didn't find a clock");
+ return 0;
+ }
} else tol = clk/8;
// look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
- start= -1;
- skip= 0;
- for (i= 0; i < j - 4 ; ++i)
- {
+ start = -1;
+ for (i= 0; i < j - 4 ; ++i) {
skip += tmpbuff[i];
- if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
- if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol)
- if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol)
- if (tmpbuff[i+3] >= clk-tol)
+ if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
+ if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
+ if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
+ if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
{
start= i + 4;
break;
}
}
- startblock= i + 4;
+ startblock = i + 4;
// skip over the remainder of LW
- skip += tmpbuff[i+1] + tmpbuff[i+2] + clk + clk/8;
-
- int phaseoff = tmpbuff[i+3]-clk;
-
+ skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
+ if (tmpbuff[i+3]>clk)
+ phaseoff = tmpbuff[i+3]-clk;
+ else
+ phaseoff = 0;
// now do it again to find the end
end = skip;
- for (i += 3; i < j - 4 ; ++i)
- {
+ for (i += 3; i < j - 4 ; ++i) {
end += tmpbuff[i];
- if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3 + tol)
- if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2 + tol)
- if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3 + tol)
- if (tmpbuff[i+3] >= clk-tol)
+ if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks
+ if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks
+ if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks
+ if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following
{
complete= true;
break;
// report back
if (verbose || g_debugMode) {
if (start >= 0) {
- PrintAndLog("\nNote: should print 45 bits then 0177 (end of block)");
- PrintAndLog(" for each block");
- PrintAndLog(" Also, sometimes the demod gets out of sync and ");
- PrintAndLog(" inverts the output - when this happens the 0177");
- PrintAndLog(" will be 3 extra 1's at the end");
- PrintAndLog(" 'data askedge' command may fix that");
+ PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
} else {
- PrintAndLog("No data found!");
+ PrintAndLog("No data found!, clock tried:%d",clk);
PrintAndLog("Try again with more samples.");
+ PrintAndLog(" or after a 'data askedge' command to clean up the read");
return 0;
}
- if (!complete)
- {
- PrintAndLog("*** Warning!");
- PrintAndLog("Partial data - no end found!");
- PrintAndLog("Try again with more samples.");
- }
} else if (start < 0) return 0;
- start=skip;
+ start = skip;
snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
// get rid of leading crap
- snprintf(tmp, sizeof(tmp),"%i",skip);
+ snprintf(tmp, sizeof(tmp), "%i", skip);
CmdLtrim(tmp);
bool pTest;
- bool AllPTest=true;
+ bool AllPTest = true;
// now work through remaining buffer printing out data blocks
block = 0;
i = startblock;
- while (block < 6)
- {
+ while (block < 6) {
if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block);
skip = phaseoff;
// look for LW before start of next block
- for ( ; i < j - 4 ; ++i)
- {
+ for ( ; i < j - 4 ; ++i) {
skip += tmpbuff[i];
if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol)
if (tmpbuff[i+1] >= clk-tol)
break;
}
+ if (i >= j-4) break; //next LW not found
skip += clk;
- phaseoff = tmpbuff[i+1]-clk;
+ if (tmpbuff[i+1]>clk)
+ phaseoff = tmpbuff[i+1]-clk;
+ else
+ phaseoff = 0;
i += 2;
- if (ASKmanDemod(tmp2, false, false)<1) return 0;
+ if (ASKDemod(tmp2, false, false, 1) < 1) {
+ save_restoreGB(0);
+ return 0;
+ }
//set DemodBufferLen to just one block
DemodBufferLen = skip/clk;
//test parities
pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0);
AllPTest &= pTest;
//get output
- Code[block]=OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
- if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d",start, skip/clk);
+ Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest);
+ if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk);
//skip to start of next block
snprintf(tmp,sizeof(tmp),"%i",skip);
CmdLtrim(tmp);
block++;
- if (i>=end) break; //in case chip doesn't output 6 blocks
+ if (i >= end) break; //in case chip doesn't output 6 blocks
}
//print full code:
if (verbose || g_debugMode || AllPTest){
- PrintAndLog("Found data at sample: %i - using clock: %i",skip,clk);
- //PrintAndLog("\nSummary:");
- end=block;
- for (block=0; block<end; block++){
+ if (!complete) {
+ PrintAndLog("*** Warning!");
+ PrintAndLog("Partial data - no end found!");
+ PrintAndLog("Try again with more samples.");
+ }
+ PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);
+ end = block;
+ for (block=0; block < end; block++){
PrintAndLog("Block %d: %08x",block,Code[block]);
}
- if (AllPTest)
+ if (AllPTest) {
PrintAndLog("Parities Passed");
- else
+ } else {
PrintAndLog("Parities Failed");
+ PrintAndLog("Try cleaning the read samples with 'data askedge'");
+ }
}
//restore GraphBuffer
return (int)AllPTest;
}
-int CmdEM4x50Read(const char *Cmd)
-{
+int CmdEM4x50Read(const char *Cmd) {
return EM4x50Read(Cmd, true);
}
-int CmdReadWord(const char *Cmd)
-{
- int Word = -1; //default to invalid word
- UsbCommand c;
+int usage_lf_em_read(void) {
+ PrintAndLog("Read EM 4x05/4x50/EM4x69. Tag must be on antenna. ");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf em readword [h] <address> <pwd>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h - this help");
+ PrintAndLog(" address - memory address to read. (0-15)");
+ PrintAndLog(" pwd - password (hex) (optional)");
+ PrintAndLog("samples:");
+ PrintAndLog(" lf em readword 1");
+ PrintAndLog(" lf em readword 1 11223344");
+ return 0;
+}
+
+int usage_lf_em_write(void) {
+ PrintAndLog("Write EM 4x05/4x50/4x69. Tag must be on antenna. ");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf em writeword [h] <address> <data> <pwd>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h - this help");
+ PrintAndLog(" address - memory address to write to. (0-15)");
+ PrintAndLog(" data - data to write (hex)");
+ PrintAndLog(" pwd - password (hex) (optional)");
+ PrintAndLog("samples:");
+ PrintAndLog(" lf em writeword 1");
+ PrintAndLog(" lf em writeword 1 deadc0de 11223344");
+ return 0;
+}
+
+#define EM_PREAMBLE_LEN 6
+// download samples from device
+// and copy them to Graphbuffer
+bool downloadSamplesEM(){
- sscanf(Cmd, "%d", &Word);
+ // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples)
+ uint8_t got[6000];
+ GetFromBigBuf(got, sizeof(got), 0);
+ if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) {
+ PrintAndLog("command execution time out");
+ return FALSE;
+ }
+ setGraphBuf(got, sizeof(got));
+ return TRUE;
+}
+//search for given preamble in given BitStream and return success=1 or fail=0 and startIndex
+bool doPreambleSearch(size_t *startIdx){
- if ( (Word > 15) | (Word < 0) ) {
- PrintAndLog("Word must be between 0 and 15");
- return 1;
+ // sanity check
+ if ( DemodBufferLen < EM_PREAMBLE_LEN) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 demodbuffer too small");
+ return FALSE;
}
- PrintAndLog("Reading word %d", Word);
+ // skip first two 0 bits as they might have been missed in the demod
+ uint8_t preamble[EM_PREAMBLE_LEN] = {0,0,1,0,1,0};
- c.cmd = CMD_EM4X_READ_WORD;
- c.d.asBytes[0] = 0x0; //Normal mode
- c.arg[0] = 0;
- c.arg[1] = Word;
- c.arg[2] = 0;
- SendCommand(&c);
- return 0;
-}
-
-int CmdReadWordPWD(const char *Cmd)
-{
- int Word = -1; //default to invalid word
- int Password = 0xFFFFFFFF; //default to blank password
- UsbCommand c;
+ // set size to 10 to only test first 4 positions for the preamble
+ size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
+ *startIdx = 0;
+ uint8_t found = 0;
- sscanf(Cmd, "%d %x", &Word, &Password);
+ // em only sends preamble once, so look for it once in the first x bits
+ for (int idx = 0; idx < size - EM_PREAMBLE_LEN; idx++){
+ if (memcmp(DemodBuffer+idx, preamble, EM_PREAMBLE_LEN) == 0){
+ //first index found
+ *startIdx = idx;
+ found = 1;
+ break;
+ }
+ }
- if ( (Word > 15) | (Word < 0) ) {
- PrintAndLog("Word must be between 0 and 15");
+ if ( !found) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+bool detectFSK(){
+ // detect fsk clock
+ if (!GetFskClock("", FALSE, FALSE)) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK clock failed");
+ return FALSE;
+ }
+ // demod
+ int ans = FSKrawDemod("0 0", FALSE);
+ if (!ans) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed");
+ return FALSE;
+ }
+ return TRUE;
+}
+// PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... )
+bool detectPSK(){
+ int ans = GetPskClock("", FALSE, FALSE);
+ if (ans <= 0) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK clock failed");
+ return FALSE;
+ }
+ PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod");
+ return TRUE;
+}
+// try manchester - NOTE: ST only applies to T55x7 tags.
+bool detectASK_MAN(){
+ bool stcheck = FALSE;
+ int ans = ASKDemod_ext("0 0 0", FALSE, FALSE, 1, &stcheck);
+ if (!ans) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
+ return FALSE;
+ }
+ return TRUE;
+}
+bool detectASK_BI(){
+ int ans = ASKbiphaseDemod("0 0 1", FALSE);
+ if (!ans) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase normal demod failed");
+
+ ans = ASKbiphaseDemod("0 1 1", FALSE);
+ if (!ans) {
+ if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase inverted demod failed");
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+// param: idx - start index in demoded data.
+int setDemodBufferEM(uint8_t bitsNeeded, size_t idx){
+ if ( bitsNeeded < DemodBufferLen) {
+ setDemodBuf(DemodBuffer + idx + EM_PREAMBLE_LEN, bitsNeeded, 0);
+ CmdPrintDemodBuff("x");
return 1;
}
+ return -1;
+}
+
+// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE
+// should cover 90% of known used configs
+// the rest will need to be manually demoded for now...
+int demodEM4x05resp(uint8_t bitsNeeded) {
+ size_t startIdx = 0;
- PrintAndLog("Reading word %d with password %08X", Word, Password);
+ if (detectASK_MAN() && doPreambleSearch( &startIdx ))
+ return setDemodBufferEM(bitsNeeded, startIdx);
- c.cmd = CMD_EM4X_READ_WORD;
- c.d.asBytes[0] = 0x1; //Password mode
- c.arg[0] = 0;
- c.arg[1] = Word;
- c.arg[2] = Password;
- SendCommand(&c);
- return 0;
+ if (detectASK_BI() && doPreambleSearch( &startIdx ))
+ return setDemodBufferEM(bitsNeeded, startIdx);
+
+ if (detectFSK() && doPreambleSearch( &startIdx ))
+ return setDemodBufferEM(bitsNeeded, startIdx);
+
+ if (detectPSK() && doPreambleSearch( &startIdx ))
+ return setDemodBufferEM(bitsNeeded, startIdx);
+
+ return -1;
}
-int CmdWriteWord(const char *Cmd)
-{
- int Word = 16; //default to invalid block
- int Data = 0xFFFFFFFF; //default to blank data
- UsbCommand c;
-
- sscanf(Cmd, "%x %d", &Data, &Word);
+int CmdReadWord(const char *Cmd) {
+ int addr, pwd;
+ bool usePwd = false;
+ uint8_t ctmp = param_getchar(Cmd, 0);
+ if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_read();
+
+ addr = param_get8ex(Cmd, 0, -1, 10);
+ pwd = param_get32ex(Cmd, 1, -1, 16);
- if (Word > 15) {
- PrintAndLog("Word must be between 0 and 15");
+ if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
+ PrintAndLog("Address must be between 0 and 15");
return 1;
}
+ if ( pwd == -1 )
+ PrintAndLog("Reading address %d", addr);
+ else {
+ usePwd = true;
+ PrintAndLog("Reading address %d | password %08X", addr, pwd);
+ }
- PrintAndLog("Writing word %d with data %08X", Word, Data);
-
- c.cmd = CMD_EM4X_WRITE_WORD;
- c.d.asBytes[0] = 0x0; //Normal mode
- c.arg[0] = Data;
- c.arg[1] = Word;
- c.arg[2] = 0;
+ UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
+ clearCommandBuffer();
SendCommand(&c);
- return 0;
+ UsbCommand resp;
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){
+ PrintAndLog("Command timed out");
+ return -1;
+ }
+
+ if (!downloadSamplesEM())
+ return -1;
+
+ int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
+ if (graphJustNoise(GraphBuffer, testLen)) {
+ PrintAndLog("Tag not found");
+ return -1;
+ }
+
+ //attempt demod:
+ //need 32 bits from a read word
+ int result = demodEM4x05resp(44);
+ if (result == -1)
+ PrintAndLog("Read failed");
+
+ return result;
}
-int CmdWriteWordPWD(const char *Cmd)
-{
- int Word = 16; //default to invalid word
- int Data = 0xFFFFFFFF; //default to blank data
- int Password = 0xFFFFFFFF; //default to blank password
- UsbCommand c;
+int CmdWriteWord(const char *Cmd) {
+ uint8_t ctmp = param_getchar(Cmd, 0);
+ if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write();
+
+ bool usePwd = false;
+ int addr = 16; // default to invalid address
+ int data = 0xFFFFFFFF; // default to blank data
+ int pwd = 0xFFFFFFFF; // default to blank password
- sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
+ addr = param_get8ex(Cmd, 0, -1, 10);
+ data = param_get32ex(Cmd, 1, -1, 16);
+ pwd = param_get32ex(Cmd, 2, -1, 16);
- if (Word > 15) {
- PrintAndLog("Word must be between 0 and 15");
+ if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
+ PrintAndLog("Address must be between 0 and 15");
return 1;
}
+ if ( pwd == -1 )
+ PrintAndLog("Writing address %d data %08X", addr, data);
+ else {
+ usePwd = true;
+ PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd);
+ }
- PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
+ uint16_t flag = (addr << 8 ) | usePwd;
- c.cmd = CMD_EM4X_WRITE_WORD;
- c.d.asBytes[0] = 0x1; //Password mode
- c.arg[0] = Data;
- c.arg[1] = Word;
- c.arg[2] = Password;
+ UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}};
+ clearCommandBuffer();
SendCommand(&c);
- return 0;
+ UsbCommand resp;
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+ PrintAndLog("Error occurred, device did not respond during write operation.");
+ return -1;
+ }
+
+ if (!downloadSamplesEM())
+ return -1;
+
+ //todo: check response for 00001010 then write data for write confirmation!
+
+ //attempt demod:
+ //need 0 bits demoded (after preamble) to verify write cmd
+ int result = demodEM4x05resp(0);
+ if (result == 1)
+ PrintAndLog("Write Verified");
+
+ return result;
}
-static command_t CommandTable[] =
-{
- {"help", CmdHelp, 1, "This help"},
- {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
- {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
- {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
- {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
- {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
- {"em410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
- {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
- {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},
- {"readwordPWD", CmdReadWordPWD, 1, "<Word> <Password> -- Read EM4xxx word data in password mode"},
- {"writeword", CmdWriteWord, 1, "<Data> <Word> -- Write EM4xxx word data"},
- {"writewordPWD", CmdWriteWordPWD, 1, "<Data> <Word> <Password> -- Write EM4xxx word data in password mode"},
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
+ {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},
+ {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
+ {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
+ {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
+ {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
+ {"em410xwrite", CmdEM410xWrite, 0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
+ {"em4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graphbuffer"},
+ {"readword", CmdReadWord, 1, "read EM4x05/4x69 data"},
+ {"writeword", CmdWriteWord, 1, "write EM405/4x69 data"},
{NULL, NULL, 0, NULL}
};
-int CmdLFEM4X(const char *Cmd)
-{
+int CmdLFEM4X(const char *Cmd) {
+ clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
-int CmdHelp(const char *Cmd)
-{
+int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
projects / proxmark3-svn / blobdiff