X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c7ea35a9fbdb39825afbcce51088ba90f903b147..17a9ca0cdc865d16ecd12bd9fb08b5ab2b329d73:/client/cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 2cf8f569..7cc62987 100644
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -225,30 +225,109 @@ int CmdEM410xWrite(const char *Cmd)
 
 bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 {
-	if (rows*cols>size) return false;
+	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;
+		if (colP != pType) return FALSE;
 	}
-	return true;
+	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;
+	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;
+		if (rowP != pType) return FALSE;
 	}
-	return true;
+	return TRUE;
+}
+
+// EM word parity test.
+// 9*5 = 45 bits in total
+// 012345678|r1
+// 012345678|r2
+// 012345678|r3
+// 012345678|r4
+// ------------
+//c012345678| 0  
+//            |- must be zero
+
+bool EMwordparitytest(uint8_t *bits){
+
+	// last row/col parity must be 0
+	if (bits[44] != 0 ) return FALSE;
+	
+	// col parity check
+	uint8_t c1 = bytebits_to_byte(bits, 8) ^ bytebits_to_byte(bits+9, 8) ^ bytebits_to_byte(bits+18, 8) ^ bytebits_to_byte(bits+27, 8);
+	uint8_t c2 = bytebits_to_byte(bits+36, 8);
+	if ( c1 != c2 ) return FALSE;
+
+	// row parity check
+	uint8_t rowP = 0;
+	for ( uint8_t i = 0; i < 36; ++i ) {
+
+		rowP ^= bits[i];
+		if ( i>0 && (i % 9) == 0) {
+			
+			if ( rowP != EVEN )	
+				return FALSE;
+
+			rowP = 0;
+		}
+	}
+	// all checks ok.
+	return TRUE;
+}
+
+
+//////////////// 4050 / 4450 commands
+int usage_lf_em4x50_dump(void) {
+	PrintAndLog("Dump EM4x50/EM4x69.  Tag must be on antenna. ");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf em 4x50dump [h] <pwd>");
+	PrintAndLog("Options:");
+	PrintAndLog("       h         - this help");
+	PrintAndLog("       pwd       - password (hex) (optional)");
+	PrintAndLog("samples:");
+	PrintAndLog("      lf em 4x50dump");
+	PrintAndLog("      lf em 4x50dump 11223344");
+	return 0;
+}
+int usage_lf_em4x50_read(void) {
+	PrintAndLog("Read EM 4x50/EM4x69.  Tag must be on antenna. ");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf em 4x50read [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 4x50read 1");
+	PrintAndLog("      lf em 4x50read 1 11223344");
+	return 0;
+}
+int usage_lf_em4x50_write(void) {
+	PrintAndLog("Write EM 4x50/4x69.  Tag must be on antenna. ");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf em 4x50write [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 4x50write 1 deadc0de");
+	PrintAndLog("      lf em 4x50write 1 deadc0de 11223344");
+	return 0;
 }
 
 uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)
@@ -283,7 +362,9 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool
 	}
 	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
@@ -303,21 +384,7 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool
  * Word Read values. UID is stored in block 32.
  */
  //completed by Marshmellow
-int EM4x50Read(const char *Cmd, bool verbose)
-{
-	/*
-	char buf[30] = {0x00};
-	char *cmdStr = buf;
-	int ans = 0;
-	bool ST = config.ST;
-	uint8_t bitRate[8] = {8,16,32,40,50,64,100,128};
-	DemodBufferLen = 0x00;	
-	snprintf(cmdStr, sizeof(buf),"%d %d 1", bitRate[config.bitrate], config.inverted );
-	ans = ASKDemod_ext(cmdStr, FALSE, FALSE, 1, &ST);
-	snprintf(cmdStr, sizeof(buf),"0 %d %d 1", bitRate[config.bitrate], config.inverted );
-	ans = ASKbiphaseDemod(cmdStr, FALSE);
-	*/
-	
+int EM4x50Read(const char *Cmd, bool verbose) {
 	uint8_t fndClk[] = {8,16,32,40,50,64,128};
 	int clk = 0; 
 	int invert = 0;
@@ -508,27 +575,259 @@ int EM4x50Read(const char *Cmd, bool verbose)
 }
 
 int CmdEM4x50Read(const char *Cmd) {
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_read();	
 	return EM4x50Read(Cmd, true);
 }
+int CmdEM4x50Write(const char *Cmd){
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_write();
+	PrintAndLog("no implemented yet");
+	return 0;
+}
+int CmdEM4x50Dump(const char *Cmd){
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_dump();
+	PrintAndLog("no implemented yet");
+	return 0;
+}
+
+#define EM_PREAMBLE_LEN 6
+// download samples from device
+// and copy them to Graphbuffer
+bool downloadSamplesEM(){
+	
+	// 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){
+	
+	// sanity check
+	if ( DemodBufferLen < EM_PREAMBLE_LEN) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 demodbuffer too small");
+		return FALSE;
+	}
+	
+	// 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};
+	
+	// set size to 15 to only test first 4 positions for the preamble
+	size_t size = (15 > DemodBufferLen) ? DemodBufferLen : 15;
+	*startIdx = 0; 
+	uint8_t found = 0;
+	
+	// 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 ( !found) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx);
+		return FALSE;
+	} 
+	return TRUE;
+}
 
-int usage_lf_em_read(void) {
-	PrintAndLog("Read EM4x50.  Tag must be on antenna. ");
+bool detectFSK(){
+	// detect fsk clock
+	if (!GetFskClock("", FALSE, FALSE)) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK clock failed");
+		return FALSE;
+	}
+	// demod
+	int ans = FSKrawDemod("0 0", FALSE);
+	if (!ans) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM: 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 - EM: PSK clock failed");
+		return FALSE;
+	}
+	//demod
+	//try psk1 -- 0 0 6 (six errors?!?)
+	ans = PSKDemod("0 0 6", FALSE);
+	if (!ans) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 Demod failed");
+
+		//try psk1 inverted
+		ans = PSKDemod("0 1 6", FALSE);
+		if (!ans) {
+			if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 inverted Demod failed");
+			return FALSE;
+		}
+	}
+	// either PSK1 or PSK1 inverted is ok from here.
+	// lets check PSK2 later.
+	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 - EM: 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 - EM: ASK/biphase normal demod failed");
+		
+		ans = ASKbiphaseDemod("0 1 1", FALSE);
+		if (!ans) {
+			if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/biphase inverted demod failed");
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+
+// param: idx - start index in demoded data.
+bool setDemodBufferEM(uint32_t *word, size_t idx){
+
+	//test for even parity bits.
+	uint8_t parity[45] = {0};
+	memcpy( parity, DemodBuffer, 45);
+	if (!EMwordparitytest(parity) ){
+		PrintAndLog("DEBUG: Error - EM Parity tests failed");
+		return FALSE;
+	}
+	
+	size_t size = removeParity(DemodBuffer, idx + EM_PREAMBLE_LEN, 9, 0, 44);
+	if (!size) {
+		if (g_debugMode) PrintAndLog("DEBUG: Error - EM Parity not detected");
+		return FALSE;
+	}
+	// set & copy to output
+	setDemodBuf(DemodBuffer, 40, 0);
+	*word = bytebits_to_byteLSBF(DemodBuffer, 32);
+	return TRUE;
+}
+
+// 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...
+bool demodEM4x05resp(uint32_t *word) {
+	size_t idx = 0;	
+	
+	if (detectASK_MAN() && doPreambleSearch( &idx ))
+		return setDemodBufferEM(word, idx);
+	
+	if (detectASK_BI() && doPreambleSearch( &idx ))
+		return setDemodBufferEM(word, idx);
+	
+	if (detectFSK() && doPreambleSearch( &idx ))
+		return setDemodBufferEM(word, idx);
+	
+	if (detectPSK()) {
+		if (doPreambleSearch( &idx ))
+			return setDemodBufferEM(word, idx);
+		
+		psk1TOpsk2(DemodBuffer, DemodBufferLen);
+		if (doPreambleSearch( &idx ))
+			return setDemodBufferEM(word, idx);
+	}
+	return FALSE;
+}
+
+//////////////// 4205 / 4305 commands
+int usage_lf_em4x05_dump(void) {
+	PrintAndLog("Dump EM4x05/EM4x69.  Tag must be on antenna. ");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf em 4x05dump [h] <pwd>");
+	PrintAndLog("Options:");
+	PrintAndLog("       h         - this help");
+	PrintAndLog("       pwd       - password (hex) (optional)");
+	PrintAndLog("samples:");
+	PrintAndLog("      lf em 4x05dump");
+	PrintAndLog("      lf em 4x05dump 11223344");
+	return 0;
+}
+int usage_lf_em4x05_read(void) {
+	PrintAndLog("Read EM4x05/EM4x69.  Tag must be on antenna. ");
 	PrintAndLog("");
-	PrintAndLog("Usage:  lf em readword [h] <address> <pwd>");
+	PrintAndLog("Usage:  lf em 4x05read [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");
+	PrintAndLog("      lf em 4x05read 1");
+	PrintAndLog("      lf em 4x05read 1 11223344");
+	return 0;
+}
+int usage_lf_em4x05_write(void) {
+	PrintAndLog("Write EM4x05/4x69.  Tag must be on antenna. ");
+	PrintAndLog("");
+	PrintAndLog("Usage:  lf em 4x05write [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 4x05write 1 deadc0de");
+	PrintAndLog("      lf em 4x05write 1 deadc0de 11223344");
 	return 0;
 }
-int CmdReadWord(const char *Cmd) {
+
+int CmdEM4x05Dump(const char *Cmd) {
+	uint8_t addr = 0;
+	uint32_t pwd = 0;
+	bool usePwd = false;
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_dump();
+
+	// for now use default input of 1 as invalid (unlikely 1 will be a valid password...)
+	pwd = param_get32ex(Cmd, 0, 1, 16);
+	
+	if ( pwd != 1 )
+		usePwd = true;
+
+	int success = 1;
+	PrintAndLog("Addr | data   | ascii");
+	PrintAndLog("-----+--------+------");
+	for (; addr < 16; addr++) {
+		if (addr == 2) {
+			if (usePwd) {
+				PrintAndLog(" %02u | %08X", addr, pwd);
+			} else {
+				PrintAndLog(" 02 | cannot read");
+			}
+		} else {
+			//success &= EM4x05Read(addr, pwd, usePwd);
+		}
+	}
+
+	return success;
+}
+//ICEMAN;  mentalnote to self: -1 is not doable for uint32_t..
+int CmdEM4x05Read(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();
+	if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_read();
 
 	addr = param_get8ex(Cmd, 0, -1, 10);
 	pwd =  param_get32ex(Cmd, 1, -1, 16);
@@ -552,38 +851,32 @@ int CmdReadWord(const char *Cmd) {
 		PrintAndLog("Command timed out");
 		return -1;
 	}
+
+	if (!downloadSamplesEM())
+		return -1;
 	
-	//uint8_t got[12288];
-	uint8_t got[30000];
-	GetFromBigBuf(got, sizeof(got), 0);
-	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 8000) ) {
-		PrintAndLog("command execution time out");
-		return 0;
+	int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
+	if (graphJustNoise(GraphBuffer, testLen)) {
+		PrintAndLog("Tag not found");
+		return -1;
 	}
-	setGraphBuf(got, sizeof(got));
-	return 1;
-}
 
-int usage_lf_em_write(void) {
-	PrintAndLog("Write EM4x50.  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;
+	//attempt demod
+	uint32_t word = 0;
+	int isOk = demodEM4x05resp(&word);
+	if (isOk)
+		PrintAndLog("Got Address %02d | %08X",addr, word);
+	else
+		PrintAndLog("Read failed");
+	
+	return isOk;
 }
-int CmdWriteWord(const char *Cmd) {
+
+int CmdEM4x05Write(const char *Cmd) {
 	uint8_t ctmp = param_getchar(Cmd, 0);
-	if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write();
+	if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_write();
 	
-	bool usePwd = false;
-		
+	bool usePwd = false;		
 	int addr = 16; // default to invalid address
 	int data = 0xFFFFFFFF; // default to blank data
 	int pwd = 0xFFFFFFFF; // default to blank password
@@ -592,7 +885,6 @@ int CmdWriteWord(const char *Cmd) {
 	data = param_get32ex(Cmd, 1, -1, 16);
 	pwd =  param_get32ex(Cmd, 2, -1, 16);
 	
-	
 	if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
 		PrintAndLog("Address must be between 0 and 15");
 		return 1;
@@ -610,24 +902,40 @@ int CmdWriteWord(const char *Cmd) {
 	clearCommandBuffer();
 	SendCommand(&c);
 	UsbCommand resp;	
-	if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)){
 		PrintAndLog("Error occurred, device did not respond during write operation.");
 		return -1;
 	}
-	return 0;
+	
+	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
+	uint32_t dummy = 0;
+	int isOk = demodEM4x05resp(&dummy);
+	if (isOk)
+		PrintAndLog("Write Verified");
+
+	return isOk;
 }
 
 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, "Read EM4xxx data"},
-	{"writeword",	CmdWriteWord, 		1, "Write EM4xxx data"},
+	{"410xdemod",	CmdEMdemodASK, 		0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},  
+	{"410xread",	CmdEM410xRead, 		1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"},
+	{"410xsim",		CmdEM410xSim, 		0, "<UID> -- Simulate EM410x 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, 	0, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
+	{"4x05read",	CmdEM4x05Read, 		0, "read word data from EM4205/4305"},
+	{"4x05write",	CmdEM4x05Write,		0, "write word data to EM4205/4305"},
+	{"4x05dump",	CmdEM4x05Dump,		0, "dump EM4205/4305 tag"},
+	{"4x50read",	CmdEM4x50Read, 		0, "read word data from EM4x50"},
+	{"4x50write",	CmdEM4x50Write, 	0, "write word data to EM4x50"},
+	{"4x50dump",	CmdEM4x50Dump,		0, "dump EM4x50 tag"},
 	{NULL, NULL, 0, NULL}
 };