X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/75465377b93c9a27450a186342e9cfd2a84b4173..d3499d369d191057fea1335c4e50e907c6a9369f:/client/cmdlfem4x.c?ds=sidebyside
diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 3c46d3b1..c5f57d55 100644
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -1,4 +1,4 @@
-//-----------------------------------------------------------------------------
+ //-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
@@ -21,7 +21,8 @@
#include "cmdlfem4x.h"
#include "util.h"
#include "data.h"
-#define LF_TRACE_BUFF_SIZE 16000
+#define LF_TRACE_BUFF_SIZE 12000
+#define LF_BITSSTREAM_LEN 1000
char *global_em410xId;
@@ -56,7 +57,7 @@ int CmdEM410xRead(const char *Cmd)
/* get clock */
clock = GetClock(Cmd, high, 0);
-
+
/* parity for our 4 columns */
parity[0] = parity[1] = parity[2] = parity[3] = 0;
header = rows = 0;
@@ -97,7 +98,7 @@ int CmdEM410xRead(const char *Cmd)
retest:
/* We go till 5 before the graph ends because we'll get that far below */
- for (i = 1; i < bit2idx - 5; i++)
+ for (i = 0; i < bit2idx - 5; i++)
{
/* Step 2: We have our header but need our tag ID */
if (header == 9 && rows < 10)
@@ -126,7 +127,7 @@ retest:
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;
+ i -= 9 + (5 * rows) -5;
rows = header = 0;
}
@@ -194,18 +195,33 @@ retest:
* 0 <-- stop bit, end of tag
*/
int CmdEM410xSim(const char *Cmd)
-{
- int i, n, j, h, binary[4], parity[4];
+{
+ 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("");
+ PrintAndLog(" sample: lf em4x 410xsim 0F0368568B");
+ return 0;
+ }
+ 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]);
+ PrintAndLog("Press pm3-button to about simulation");
+
/* clock is 64 in EM410x tags */
int clock = 64;
/* clear our graph */
ClearGraph(0);
-
- /* write it out a few times */
- for (h = 0; h < 4; h++)
- {
+
/* write 9 start bits */
for (i = 0; i < 9; i++)
AppendGraph(0, clock, 1);
@@ -241,52 +257,45 @@ int CmdEM410xSim(const char *Cmd)
AppendGraph(0, clock, parity[2]);
AppendGraph(0, clock, parity[3]);
- /* stop bit */
- AppendGraph(0, clock, 0);
- }
-
- /* modulate that biatch */
- CmdManchesterMod("");
-
- /* booyah! */
- RepaintGraphWindow();
-
- CmdLFSim("");
+ /* stop bit */
+ AppendGraph(1, clock, 0);
+
+ CmdLFSim("240"); //240 start_gap.
return 0;
}
-/* Function is equivalent of loread + losamples + em410xread
- * looped until an EM410x tag is detected */
+/* Function is equivalent of lf read + data samples + em410xread
+ * looped until an EM410x tag is detected
+ *
+ * Why is CmdSamples("16000")?
+ * TBD: Auto-grow sample size based on detected sample rate. IE: If the
+ * 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');
- //char k;
- do
- {
- CmdLFRead(read_h ? "h" : "");
- // 2000 samples is OK for clock=64, but not clock=32. Probably want
- // 8000 for clock=16. Don't want to go too high since old HID driver
- // is very slow
- // TBD: Auto-grow sample size based on detected sample rate. IE: If the
- // 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
- CmdSamples("16000");
- } while (
+ int read_h = (*Cmd == 'h');
+ do
+ {
+ if (ukbhit()) {
+ printf("\naborted via keyboard!\n");
+ break;
+ }
+
+ CmdLFRead(read_h ? "h" : "");
+ CmdSamples("6000");
+
+ } while (
!CmdEM410xRead("")
);
- return 0;
+ return 0;
}
int CmdEM410xWatchnSpoof(const char *Cmd)
{
- int read_h = (*Cmd == 'h');
- do
- {
- CmdLFRead(read_h ? "h" : "");
- CmdSamples("16000");
- } while ( ! CmdEM410xRead(""));
+ CmdEM410xWatch(Cmd);
PrintAndLog("# Replaying : %s",global_em410xId);
CmdEM410xSim(global_em410xId);
return 0;
@@ -343,7 +352,7 @@ int CmdEM4x50Read(const char *Cmd)
++i;
while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
++i;
- if (j>(MAX_GRAPH_TRACE_LEN/64)) {
+ if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
break;
}
tmpbuff[j++]= i - start;
@@ -526,29 +535,20 @@ int CmdReadWord(const char *Cmd)
SendCommand(&c);
WaitForResponse(CMD_ACK, NULL);
- uint8_t data[LF_TRACE_BUFF_SIZE];
- memset(data, 0x00, LF_TRACE_BUFF_SIZE);
+ 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]) - 128;
+ GraphBuffer[j] = ((int)data[j]);
}
GraphTraceLen = LF_TRACE_BUFF_SIZE;
-
- // BiDirectional
- //CmdDirectionalThreshold("70 -60");
-
- // Askdemod
- //Cmdaskdemod("1");
- uint8_t bits[1000];
+ uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
uint8_t * bitstream = bits;
- memset(bitstream, 0x00, sizeof(bits));
-
- manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream);
-
+ manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
+ RepaintGraphWindow();
return 0;
}
@@ -575,28 +575,20 @@ int CmdReadWordPWD(const char *Cmd)
SendCommand(&c);
WaitForResponse(CMD_ACK, NULL);
- uint8_t data[LF_TRACE_BUFF_SIZE];
- memset(data, 0x00, LF_TRACE_BUFF_SIZE);
+ 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]) - 128;
+ GraphBuffer[j] = ((int)data[j]);
}
GraphTraceLen = LF_TRACE_BUFF_SIZE;
-
- // BiDirectional
- //CmdDirectionalThreshold("70 -60");
- // Askdemod
- //Cmdaskdemod("1");
-
- uint8_t bits[1000];
- uint8_t * bitstream = bits;
- memset(bitstream, 0x00, sizeof(bits));
-
- manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream);
+ 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;
}
@@ -613,7 +605,7 @@ int CmdWriteWord(const char *Cmd)
return 1;
}
- PrintAndLog("Writting word %d with data %08X", Word, Data);
+ PrintAndLog("Writing word %d with data %08X", Word, Data);
c.cmd = CMD_EM4X_WRITE_WORD;
c.d.asBytes[0] = 0x0; //Normal mode
@@ -626,7 +618,7 @@ int CmdWriteWord(const char *Cmd)
int CmdWriteWordPWD(const char *Cmd)
{
- int Word = 8; //default to invalid word
+ int Word = 16; //default to invalid word
int Data = 0xFFFFFFFF; //default to blank data
int Password = 0xFFFFFFFF; //default to blank password
UsbCommand c;
@@ -638,7 +630,7 @@ int CmdWriteWordPWD(const char *Cmd)
return 1;
}
- PrintAndLog("Writting word %d with data %08X and password %08X", Word, Data, Password);
+ 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
@@ -652,12 +644,14 @@ int CmdWriteWordPWD(const char *Cmd)
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
- {"410read", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
- {"410sim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
- {"410watch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
- {"410spoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
- {"410write", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
- {"4xread", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
+
+ {"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"},
@@ -665,6 +659,265 @@ static command_t CommandTable[] =
{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++;
+ }
+ 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);
+
+ // //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;
+
+ // //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");
+ // }
+
+ // //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");
+
+ // //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);
+ // }
+ return 0;
+}
+
int CmdLFEM4X(const char *Cmd)
{
CmdsParse(CommandTable, Cmd);