- //-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
#include <inttypes.h>
#include "proxmark3.h"
#include "ui.h"
+#include "util.h"
#include "graph.h"
-#include "cmdmain.h"
#include "cmdparser.h"
#include "cmddata.h"
#include "cmdlf.h"
#include "cmdlfem4x.h"
-#include "util.h"
-#include "data.h"
-#define LF_TRACE_BUFF_SIZE 12000
-#define LF_BITSSTREAM_LEN 1000
+#include "lfdemod.h"
+
+#define llx PRIx64
char *global_em410xId;
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;
+ SendCommand(&c);
+ return 0;
+}
+
/* Read the ID of an EM410x tag.
* Format:
* 1111 1111 1 <-- standard non-repeatable header
*/
int CmdEM410xRead(const char *Cmd)
{
- int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
- int parity[4];
- char id[11];
- char id2[11];
- int retested = 0;
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
- high = low = 0;
-
- /* Detect high and lows and clock */
- for (i = 0; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
-
- /* get clock */
- clock = GetClock(Cmd, high, 0);
-
- /* parity for our 4 columns */
- parity[0] = parity[1] = parity[2] = parity[3] = 0;
- header = rows = 0;
-
- /* manchester demodulate */
- bit = bit2idx = 0;
- for (i = 0; i < (int)(GraphTraceLen / clock); i++)
- {
- hithigh = 0;
- hitlow = 0;
- first = 1;
-
- /* Find out if we hit both high and low peaks */
- for (j = 0; j < clock; j++)
- {
- if (GraphBuffer[(i * clock) + j] == high)
- hithigh = 1;
- else if (GraphBuffer[(i * clock) + j] == low)
- hitlow = 1;
-
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
-
- BitStream[bit2idx++] = bit;
- }
-
-retest:
- /* We go till 5 before the graph ends because we'll get that far below */
- for (i = 0; i < bit2idx - 5; i++)
- {
- /* Step 2: We have our header but need our tag ID */
- if (header == 9 && rows < 10)
- {
- /* Confirm parity is correct */
- if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
- {
- /* Read another byte! */
- sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
- sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i]));
- rows++;
-
- /* Keep parity info */
- parity[0] ^= BitStream[i];
- parity[1] ^= BitStream[i+1];
- parity[2] ^= BitStream[i+2];
- parity[3] ^= BitStream[i+3];
-
- /* Move 4 bits ahead */
- i += 4;
- }
-
- /* Damn, something wrong! reset */
- else
- {
- PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);
-
- /* Start back rows * 5 + 9 header bits, -1 to not start at same place */
- i -= 9 + (5 * rows) -5;
-
- rows = header = 0;
- }
- }
-
- /* Step 3: Got our 40 bits! confirm column parity */
- else if (rows == 10)
- {
- /* We need to make sure our 4 bits of parity are correct and we have a stop bit */
- if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] &&
- BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] &&
- BitStream[i+4] == 0)
- {
- /* Sweet! */
- PrintAndLog("EM410x Tag ID: %s", id);
- PrintAndLog("Unique Tag ID: %s", id2);
-
- global_em410xId = id;
-
- /* Stop any loops */
- return 1;
- }
-
- /* Crap! Incorrect parity or no stop bit, start all over */
- else
- {
- rows = header = 0;
-
- /* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */
- i -= 59;
- }
- }
-
- /* Step 1: get our header */
- else if (header < 9)
- {
- /* Need 9 consecutive 1's */
- if (BitStream[i] == 1)
- header++;
-
- /* We don't have a header, not enough consecutive 1 bits */
- else
- header = 0;
- }
- }
-
- /* if we've already retested after flipping bits, return */
- if (retested++){
- return 0;
+ uint32_t hi=0;
+ uint64_t lo=0;
+
+ if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
+ PrintAndLog("EM410x pattern found: ");
+ printEM410x(hi, lo);
+ if (hi){
+ PrintAndLog ("EM410x XL pattern found");
+ return 0;
}
-
- /* if this didn't work, try flipping bits */
- for (i = 0; i < bit2idx; i++)
- BitStream[i] ^= 1;
-
- goto retest;
+ char id[12] = {0x00};
+ sprintf(id, "%010llx",lo);
+
+ global_em410xId = id;
+ return 1;
}
-/* emulate an EM410X tag
- * Format:
- * 1111 1111 1 <-- standard non-repeatable header
- * XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
- * ....
- * CCCC <-- each bit here is parity for the 10 bits above in corresponding column
- * 0 <-- stop bit, end of tag
- */
+// emulate an EM410X tag
int CmdEM410xSim(const char *Cmd)
-{
+{
int i, n, j, binary[4], parity[4];
char cmdp = param_getchar(Cmd, 0);
uint8_t uid[5] = {0x00};
if (cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: lf em4x 410xsim <UID>");
+ PrintAndLog("Usage: lf em4x em410xsim <UID>");
PrintAndLog("");
- PrintAndLog(" sample: lf em4x 410xsim 0F0368568B");
+ PrintAndLog(" sample: lf em4x em410xsim 0F0368568B");
return 0;
}
PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
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];
- }
-
- /* parity columns */
- AppendGraph(0, clock, parity[0]);
- AppendGraph(0, clock, parity[1]);
- AppendGraph(0, clock, parity[2]);
- AppendGraph(0, clock, parity[3]);
-
- /* stop bit */
- AppendGraph(1, clock, 0);
+
+ /* 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];
+ }
+
+ /* parity columns */
+ AppendGraph(0, clock, parity[0]);
+ AppendGraph(0, clock, parity[1]);
+ AppendGraph(0, clock, parity[2]);
+ AppendGraph(0, clock, parity[3]);
+
+ /* stop bit */
+ AppendGraph(1, clock, 0);
- CmdLFSim("240"); //240 start_gap.
- return 0;
+ CmdLFSim("0"); //240 start_gap.
+ return 0;
}
/* Function is equivalent of lf read + data samples + em410xread
* 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)
{
- int read_h = (*Cmd == 'h');
- do
- {
+ do {
if (ukbhit()) {
printf("\naborted via keyboard!\n");
break;
}
- CmdLFRead(read_h ? "h" : "");
- CmdSamples("6000");
-
- } while (
- !CmdEM410xRead("")
- );
+ CmdLFRead("s");
+ getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)
+ } while (!CmdEM410xRead(""));
+
return 0;
}
+//currently only supports manchester modulations
int CmdEM410xWatchnSpoof(const char *Cmd)
{
CmdEM410xWatch(Cmd);
- PrintAndLog("# Replaying : %s",global_em410xId);
- CmdEM410xSim(global_em410xId);
- return 0;
-}
-
-/* Read the transmitted data of an EM4x50 tag
- * Format:
- *
- * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
- * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
- * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
- * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
- * CCCCCCCC <- column parity bits
- * 0 <- stop bit
- * LW <- Listen Window
- *
- * This pattern repeats for every block of data being transmitted.
- * Transmission starts with two Listen Windows (LW - a modulated
- * pattern of 320 cycles each (32/32/128/64/64)).
- *
- * Note that this data may or may not be the UID. It is whatever data
- * is stored in the blocks defined in the control word First and Last
- * Word Read values. UID is stored in block 32.
- */
-int CmdEM4x50Read(const char *Cmd)
-{
- int i, j, startblock, skip, block, start, end, low, high;
- bool complete= false;
- int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
- char tmp[6];
-
- high= low= 0;
- memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
-
- /* first get high and low values */
- 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;
- while (i < GraphTraceLen)
- {
- // measure from low to low
- while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
- ++i;
- start= i;
- while ((GraphBuffer[i] < high) && (i<GraphTraceLen))
- ++i;
- while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
- ++i;
- if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
- break;
- }
- tmpbuff[j++]= i - start;
- }
-
- /* look for data start - should be 2 pairs of LW (pulses of 192,128) */
- start= -1;
- skip= 0;
- for (i= 0; i < j - 4 ; ++i)
- {
- skip += tmpbuff[i];
- if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
- if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
- if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
- if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
- {
- start= i + 3;
- break;
- }
- }
- startblock= i + 3;
-
- /* skip over the remainder of the LW */
- skip += tmpbuff[i+1]+tmpbuff[i+2];
- while (skip < MAX_GRAPH_TRACE_LEN && GraphBuffer[skip] > low)
- ++skip;
- skip += 8;
-
- /* now do it again to find the end */
- end= start;
- for (i += 3; i < j - 4 ; ++i)
- {
- end += tmpbuff[i];
- if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
- if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
- if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194)
- if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130)
- {
- complete= true;
- break;
- }
- }
-
- if (start >= 0)
- PrintAndLog("Found data at sample: %i",skip);
- else
- {
- PrintAndLog("No data found!");
- PrintAndLog("Try again with more samples.");
- return 0;
- }
-
- if (!complete)
- {
- PrintAndLog("*** Warning!");
- PrintAndLog("Partial data - no end found!");
- PrintAndLog("Try again with more samples.");
- }
-
- /* get rid of leading crap */
- sprintf(tmp,"%i",skip);
- CmdLtrim(tmp);
-
- /* now work through remaining buffer printing out data blocks */
- block= 0;
- i= startblock;
- while (block < 6)
- {
- PrintAndLog("Block %i:", block);
- // mandemod routine needs to be split so we can call it for data
- // just print for now for debugging
- CmdManchesterDemod("i 64");
- skip= 0;
- /* look for LW before start of next block */
- for ( ; i < j - 4 ; ++i)
- {
- skip += tmpbuff[i];
- if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194)
- if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130)
- break;
- }
- while (GraphBuffer[skip] > low)
- ++skip;
- skip += 8;
- sprintf(tmp,"%i",skip);
- CmdLtrim(tmp);
- start += skip;
- block++;
- }
- return 0;
+ PrintAndLog("# Replaying captured ID: %s",global_em410xId);
+ CmdLFaskSim("");
+ return 0;
}
int CmdEM410xWrite(const char *Cmd)
{
- uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
- int card = 0xFF; // invalid card value
+ uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
+ int card = 0xFF; // invalid card value
unsigned int clock = 0; // invalid clock value
sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
return 0;
}
- UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
- SendCommand(&c);
+ UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
+ SendCommand(&c);
+ return 0;
+}
+
+bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
+{
+ if (rows*cols>size) return false;
+ uint8_t colP=0;
+ //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];
+ }
+ if (colP != pType) return false;
+ }
+ return true;
+}
+
+bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
+{
+ if (rows*cols>size) return false;
+ uint8_t rowP=0;
+ //assume last row is a parity row and do not test
+ for (uint8_t rowNum = 0; rowNum < rows-1; rowNum++) {
+ for (uint8_t colNum = 0; colNum < cols; colNum++) {
+ rowP ^= BitStream[(rowNum*cols)+colNum];
+ }
+ if (rowP != pType) return false;
+ }
+ return true;
+}
+
+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(""); //parity byte spacer
+ PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x",
+ BitStream[i*9],
+ BitStream[i*9+1],
+ BitStream[i*9+2],
+ BitStream[i*9+3],
+ BitStream[i*9+4],
+ BitStream[i*9+5],
+ BitStream[i*9+6],
+ BitStream[i*9+7],
+ BitStream[i*9+8],
+ bytebits_to_byte(BitStream+i*9,8)
+ );
+ }
+ if (pTest)
+ PrintAndLog("Parity Passed");
+ else
+ PrintAndLog("Parity Failed");
+ }
+ return code;
+}
+/* Read the transmitted data of an EM4x50 tag
+ * Format:
+ *
+ * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
+ * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
+ * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
+ * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
+ * CCCCCCCC <- column parity bits
+ * 0 <- stop bit
+ * LW <- Listen Window
+ *
+ * This pattern repeats for every block of data being transmitted.
+ * Transmission starts with two Listen Windows (LW - a modulated
+ * pattern of 320 cycles each (32/32/128/64/64)).
+ *
+ * Note that this data may or may not be the UID. It is whatever data
+ * 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[] = {8,16,32,40,50,64,128};
+ int clk = 0;
+ int invert = 0;
+ int tol = 0;
+ int i, j, startblock, skip, block, start, end, low, high, minClk;
+ bool complete = false;
+ int tmpbuff[MAX_GRAPH_TRACE_LEN / 64];
+ uint32_t Code[6];
+ char tmp[6];
+ char tmp2[20];
+ 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++) {
+ if (GraphBuffer[i] > high)
+ high = GraphBuffer[i];
+ else if (GraphBuffer[i] < low)
+ low = GraphBuffer[i];
+ }
+
+ 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))
+ ++i;
+ start= i;
+ while ((GraphBuffer[i] < high) && (i < GraphTraceLen))
+ ++i;
+ while ((GraphBuffer[i] > low) && (i < GraphTraceLen))
+ ++i;
+ if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
+ break;
+ }
+ tmpbuff[j++]= i - start;
+ if (i-start < minClk && i < GraphTraceLen) {
+ minClk = i - start;
+ }
+ }
+ // set clock
+ if (!clk) {
+ for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
+ tol = fndClk[clkCnt]/8;
+ if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) {
+ clk=fndClk[clkCnt];
+ break;
+ }
+ }
+ if (!clk) return 0;
+ } else tol = clk/8;
+
+ // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2)
+ start = -1;
+ for (i= 0; i < j - 4 ; ++i) {
+ skip += tmpbuff[i];
+ 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;
+
+ // skip over the remainder of LW
+ 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) {
+ end += tmpbuff[i];
+ 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;
+ }
+ }
+ end = i;
+ // report back
+ if (verbose || g_debugMode) {
+ if (start >= 0) {
+ PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)");
+ } else {
+ 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;
+ }
+ } else if (start < 0) return 0;
+ 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);
+ CmdLtrim(tmp);
+ bool pTest;
+ bool AllPTest = true;
+ // now work through remaining buffer printing out data blocks
+ block = 0;
+ i = startblock;
+ 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) {
+ 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;
+ if (tmpbuff[i+1]>clk)
+ phaseoff = tmpbuff[i+1]-clk;
+ else
+ phaseoff = 0;
+ i += 2;
+ 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_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0);
+ 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", 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
+ }
+ //print full code:
+ if (verbose || g_debugMode || AllPTest){
+ 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) {
+ PrintAndLog("Parities Passed");
+ } else {
+ PrintAndLog("Parities Failed");
+ PrintAndLog("Try cleaning the read samples with 'data askedge'");
+ }
+ }
- return 0;
+ //restore GraphBuffer
+ save_restoreGB(0);
+ return (int)AllPTest;
+}
+
+int CmdEM4x50Read(const char *Cmd)
+{
+ return EM4x50Read(Cmd, true);
}
int CmdReadWord(const char *Cmd)
{
int Word = -1; //default to invalid word
UsbCommand c;
-
+
sscanf(Cmd, "%d", &Word);
-
+
if ( (Word > 15) | (Word < 0) ) {
PrintAndLog("Word must be between 0 and 15");
return 1;
}
-
+
PrintAndLog("Reading word %d", Word);
-
+
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);
- WaitForResponse(CMD_ACK, NULL);
-
- uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
-
- GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
- WaitForResponseTimeout(CMD_ACK,NULL, 1500);
-
- for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
- GraphBuffer[j] = ((int)data[j]);
- }
- GraphTraceLen = LF_TRACE_BUFF_SIZE;
-
- uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
- uint8_t * bitstream = bits;
- manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
- RepaintGraphWindow();
- return 0;
+ return 0;
}
int CmdReadWordPWD(const char *Cmd)
int Word = -1; //default to invalid word
int Password = 0xFFFFFFFF; //default to blank password
UsbCommand c;
-
+
sscanf(Cmd, "%d %x", &Word, &Password);
-
+
if ( (Word > 15) | (Word < 0) ) {
PrintAndLog("Word must be between 0 and 15");
return 1;
}
-
+
PrintAndLog("Reading word %d with password %08X", Word, Password);
-
+
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);
- WaitForResponse(CMD_ACK, NULL);
-
- uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
-
- GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset..
- WaitForResponseTimeout(CMD_ACK,NULL, 1500);
-
- for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
- GraphBuffer[j] = ((int)data[j]);
- }
- GraphTraceLen = LF_TRACE_BUFF_SIZE;
-
- uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
- uint8_t * bitstream = bits;
- manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN);
- RepaintGraphWindow();
- return 0;
+ return 0;
}
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);
-
- if (Word > 15) {
- PrintAndLog("Word must be between 0 and 15");
- return 1;
- }
-
- 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;
- SendCommand(&c);
- return 0;
-}
-
-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;
-
- sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
-
- if (Word > 15) {
- PrintAndLog("Word must be between 0 and 15");
- return 1;
- }
-
- PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
-
- 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;
- SendCommand(&c);
- return 0;
-}
-
-static command_t CommandTable[] =
-{
- {"help", CmdHelp, 1, "This help"},
-
- {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
- {"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
- {"replay", MWRem4xReplay, 0, "Watches for tag and simulates manchester encoded em4x tag"},
- {"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
- {"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
- {"410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
- {"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
- {"rd", CmdReadWord, 1, "<Word 1-15> -- Read EM4xxx word data"},
- {"rdpwd", CmdReadWordPWD, 1, "<Word 1-15> <Password> -- Read EM4xxx word data in password mode "},
- {"wr", CmdWriteWord, 1, "<Data> <Word 1-15> -- Write EM4xxx word data"},
- {"wrpwd", CmdWriteWordPWD, 1, "<Data> <Word 1-15> <Password> -- Write EM4xxx word data in password mode"},
- {NULL, NULL, 0, NULL}
-};
-
-
-//Confirms the parity of a bitstream as well as obtaining the data (TagID) from within the appropriate memory space.
-//Arguments:
-// Pointer to a string containing the desired bitsream
-// Pointer to a string that will receive the decoded tag ID
-// Length of the bitsream pointed at in the first argument, char* _strBitStream
-//Retuns:
-//1 Parity confirmed
-//0 Parity not confirmed
-int ConfirmEm410xTagParity( char* _strBitStream, char* pID, int LengthOfBitstream )
-{
- int i = 0;
- int rows = 0;
- int Parity[4] = {0x00};
- char ID[11] = {0x00};
- int k = 0;
- int BitStream[70] = {0x00};
- int counter = 0;
- //prepare variables
- for ( i = 0; i <= LengthOfBitstream; i++)
- {
- if (_strBitStream[i] == '1')
- {
- k =1;
- memcpy(&BitStream[i], &k,4);
- }
- else if (_strBitStream[i] == '0')
- {
- k = 0;
- memcpy(&BitStream[i], &k,4);
- }
- }
- while ( counter < 2 )
- {
- //set/reset variables and counters
- memset(ID,0x00,sizeof(ID));
- memset(Parity,0x00,sizeof(Parity));
- rows = 0;
- for ( i = 9; i <= LengthOfBitstream; i++)
- {
- if ( rows < 10 )
- {
- if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
- {
- sprintf(ID+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
- rows++;
- /* Keep parity info and move four bits ahead*/
- Parity[0] ^= BitStream[i];
- Parity[1] ^= BitStream[i+1];
- Parity[2] ^= BitStream[i+2];
- Parity[3] ^= BitStream[i+3];
- i += 4;
- }
- }
- if ( rows == 10 )
- {
- if ( BitStream[i] == Parity[0] && BitStream[i+1] == Parity[1] &&
- BitStream[i+2] == Parity[2] && BitStream[i+3] == Parity[3] &&
- BitStream[i+4] == 0)
- {
- memcpy(pID,ID,strlen(ID));
- return 1;
- }
- }
- }
- printf("[PARITY ->]Failed. Flipping Bits, and rechecking parity for bitstream:\n[PARITY ->]");
- for (k = 0; k < LengthOfBitstream; k++)
- {
- BitStream[k] ^= 1;
- printf("%i", BitStream[k]);
- }
- puts(" ");
- counter++;
+ int Word = 16; //default to invalid block
+ int Data = 0xFFFFFFFF; //default to blank data
+ UsbCommand c;
+
+ sscanf(Cmd, "%x %d", &Data, &Word);
+
+ if (Word > 15) {
+ PrintAndLog("Word must be between 0 and 15");
+ return 1;
}
+
+ 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;
+ SendCommand(&c);
return 0;
}
-//Reads and demodulates an em410x RFID tag. It further allows slight modification to the decoded bitstream
-//Once a suitable bitstream has been identified, and if needed, modified, it is replayed. Allowing emulation of the
-//"stolen" rfid tag.
-//No meaningful returns or arguments.
-int MWRem4xReplay(const char* Cmd)
-{
- // //header traces
- // static char ArrayTraceZero[] = { '0','0','0','0','0','0','0','0','0' };
- // static char ArrayTraceOne[] = { '1','1','1','1','1','1','1','1','1' };
- // //local string variables
- // char strClockRate[10] = {0x00};
- // char strAnswer[4] = {0x00};
- // char strTempBufferMini[2] = {0x00};
- // //our outbound bit-stream
- // char strSimulateBitStream[65] = {0x00};
- // //integers
- // int iClockRate = 0;
- // int needle = 0;
- // int j = 0;
- // int iFirstHeaderOffset = 0x00000000;
- // int numManchesterDemodBits=0;
- // //boolean values
- // bool bInverted = false;
- // //pointers to strings. memory will be allocated.
- // char* pstrInvertBitStream = 0x00000000;
- // char* pTempBuffer = 0x00000000;
- // char* pID = 0x00000000;
- // char* strBitStreamBuffer = 0x00000000;
-
- // puts("###################################");
- // puts("#### Em4x Replay ##");
- // puts("#### R.A.M. June 2013 ##");
- // puts("###################################");
- // //initialize
- // CmdLFRead("");
- // //Collect ourselves 10,000 samples
- // CmdSamples("10000");
- // puts("[->]preforming ASK demodulation\n");
- // //demodulate ask
- // Cmdaskdemod("0");
- // iClockRate = DetectClock(0);
- // sprintf(strClockRate, "%i\n",iClockRate);
- // printf("[->]Detected ClockRate: %s\n", strClockRate);
+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;
- // //If detected clock rate is something completely unreasonable, dont go ahead
- // if ( iClockRate < 0xFFFE )
- // {
- // pTempBuffer = (char*)malloc(MAX_GRAPH_TRACE_LEN);
- // if (pTempBuffer == 0x00000000)
- // return 0;
- // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN);
- // //Preform manchester de-modulation and display in a single line.
- // numManchesterDemodBits = CmdManchesterDemod( strClockRate );
- // //note: numManchesterDemodBits is set above in CmdManchesterDemod()
- // if ( numManchesterDemodBits == 0 )
- // return 0;
- // strBitStreamBuffer = malloc(numManchesterDemodBits+1);
- // if ( strBitStreamBuffer == 0x00000000 )
- // return 0;
- // memset(strBitStreamBuffer, 0x00, (numManchesterDemodBits+1));
- // //fill strBitStreamBuffer with demodulated, string formatted bits.
- // for ( j = 0; j <= numManchesterDemodBits; j++ )
- // {
- // sprintf(strTempBufferMini, "%i",BitStream[j]);
- // strcat(strBitStreamBuffer,strTempBufferMini);
- // }
- // printf("[->]Demodulated Bitstream: \n%s\n", strBitStreamBuffer);
- // //Reset counter and select most probable bit stream
- // j = 0;
- // while ( j < numManchesterDemodBits )
- // {
- // memset(strSimulateBitStream,0x00,64);
- // //search for header of nine (9) 0's : 000000000 or nine (9) 1's : 1111 1111 1
- // if ( ( strncmp(strBitStreamBuffer+j, ArrayTraceZero, sizeof(ArrayTraceZero)) == 0 ) ||
- // ( strncmp(strBitStreamBuffer+j, ArrayTraceOne, sizeof(ArrayTraceOne)) == 0 ) )
- // {
- // iFirstHeaderOffset = j;
- // memcpy(strSimulateBitStream, strBitStreamBuffer+j,64);
- // printf("[->]Offset of Header");
- // if ( strncmp(strBitStreamBuffer+iFirstHeaderOffset, "0", 1) == 0 )
- // printf("'%s'", ArrayTraceZero );
- // else
- // printf("'%s'", ArrayTraceOne );
- // printf(": %i\nHighlighted string : %s\n",iFirstHeaderOffset,strSimulateBitStream);
- // //allow us to escape loop or choose another frame
- // puts("[<-]Are we happy with this sample? [Y]es/[N]o");
- // gets(strAnswer);
- // if ( ( strncmp(strAnswer,"y",1) == 0 ) || ( strncmp(strAnswer,"Y",1) == 0 ) )
- // {
- // j = numManchesterDemodBits+1;
- // break;
- // }
- // }
- // j++;
- // }
- // }
- // else return 0;
+ sscanf(Cmd, "%x %d %x", &Data, &Word, &Password);
- // //Do we want the buffer inverted?
- // memset(strAnswer, 0x00, sizeof(strAnswer));
- // printf("[<-]Do you wish to invert the highlighted bitstream? [Y]es/[N]o\n");
- // gets(strAnswer);
- // if ( ( strncmp("y", strAnswer,1) == 0 ) || ( strncmp("Y", strAnswer, 1 ) == 0 ) )
- // {
- // //allocate heap memory
- // pstrInvertBitStream = (char*)malloc(numManchesterDemodBits);
- // if ( pstrInvertBitStream != 0x00000000 )
- // {
- // memset(pstrInvertBitStream,0x00,numManchesterDemodBits);
- // bInverted = true;
- // //Invert Bitstream
- // for ( needle = 0; needle <= numManchesterDemodBits; needle++ )
- // {
- // if (strSimulateBitStream[needle] == '0')
- // strcat(pstrInvertBitStream,"1");
- // else if (strSimulateBitStream[needle] == '1')
- // strcat(pstrInvertBitStream,"0");
- // }
- // printf("[->]Inverted bitstream: %s\n", pstrInvertBitStream);
- // }
- // }
- // //Confirm parity of selected string
- // pID = (char*)malloc(11);
- // if (pID != 0x00000000)
- // {
- // memset(pID, 0x00, 11);
- // if (ConfirmEm410xTagParity(strSimulateBitStream,pID, 64) == 1)
- // {
- // printf("[->]Parity confirmed for selected bitstream!\n");
- // printf("[->]Tag ID was detected as: [hex]:%s\n",pID );
- // }
- // else
- // printf("[->]Parity check failed for the selected bitstream!\n");
- // }
+ if (Word > 15) {
+ PrintAndLog("Word must be between 0 and 15");
+ return 1;
+ }
- // //Spoof
- // memset(strAnswer, 0x00, sizeof(strAnswer));
- // printf("[<-]Do you wish to continue with the EM4x simulation? [Y]es/[N]o\n");
- // gets(strAnswer);
- // if ( ( strncmp(strAnswer,"y",1) == 0 ) || ( strncmp(strAnswer,"Y",1) == 0 ) )
- // {
- // strcat(pTempBuffer, strClockRate);
- // strcat(pTempBuffer, " ");
- // if (bInverted == true)
- // strcat(pTempBuffer,pstrInvertBitStream);
- // if (bInverted == false)
- // strcat(pTempBuffer,strSimulateBitStream);
- // //inform the user
- // puts("[->]Starting simulation now: \n");
- // //Simulate tag with prepared buffer.
- // CmdLFSimManchester(pTempBuffer);
- // }
- // else if ( ( strcmp("n", strAnswer) == 0 ) || ( strcmp("N", strAnswer ) == 0 ) )
- // printf("[->]Exiting procedure now...\n");
- // else
- // printf("[->]Erroneous selection\nExiting procedure now....\n");
+ PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);
- // //Clean up -- Exit function
- // //clear memory, then release pointer.
- // if ( pstrInvertBitStream != 0x00000000 )
- // {
- // memset(pstrInvertBitStream,0x00,numManchesterDemodBits);
- // free(pstrInvertBitStream);
- // }
- // if ( pTempBuffer != 0x00000000 )
- // {
- // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN);
- // free(pTempBuffer);
- // }
- // if ( pID != 0x00000000 )
- // {
- // memset(pID,0x00,11);
- // free(pID);
- // }
- // if ( strBitStreamBuffer != 0x00000000 )
- // {
- // memset(strBitStreamBuffer,0x00,numManchesterDemodBits);
- // free(strBitStreamBuffer);
- // }
+ 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;
+ SendCommand(&c);
return 0;
}
+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, "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"},
+ {NULL, NULL, 0, NULL}
+};
+
int CmdLFEM4X(const char *Cmd)
{
- CmdsParse(CommandTable, Cmd);
- return 0;
+ CmdsParse(CommandTable, Cmd);
+ return 0;
}
int CmdHelp(const char *Cmd)
{
- CmdsHelp(CommandTable);
- return 0;
+ CmdsHelp(CommandTable);
+ return 0;
}
projects / proxmark3-svn / blobdiff