FIX: @marshmellow42 's ST detection fix.

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 2cc034300c020c8bbdc81ecf39acf767550e2f43..59a1eef3182a80d961a9cf926de86a2d4a309141 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -14,6 +14,20 @@ uint64_t g_em410xid = 0;
 
 static int CmdHelp(const char *Cmd);
 
 
 static int CmdHelp(const char *Cmd);
 

+int usage_lf_em410x_sim(void) {
+       PrintAndLog("Simulating EM410x tag");
+       PrintAndLog("");
+       PrintAndLog("Usage:  lf em 410xsim [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 em 410xsim 0F0368568B");
+       PrintAndLog("      lf em 410xsim 0F0368568B 32");
+       return 0;
+}
+

 int CmdEMdemodASK(const char *Cmd)
 {
        char cmdp = param_getchar(Cmd, 0);
 int CmdEMdemodASK(const char *Cmd)
 {
        char cmdp = param_getchar(Cmd, 0);


@@ -33,35 +47,16 @@ int CmdEMdemodASK(const char *Cmd)
  */
 int CmdEM410xRead(const char *Cmd)
 {
  */
 int CmdEM410xRead(const char *Cmd)
 {

-       uint32_t hi=0;
-       uint64_t lo=0;
+       uint32_t hi = 0;
+       uint64_t lo = 0;

 
        if(!AskEm410xDemod("", &hi, &lo, false)) return 0;
 
        if(!AskEm410xDemod("", &hi, &lo, false)) return 0;

-       PrintAndLog("EM410x pattern found: ");
+

        printEM410x(hi, lo);
        printEM410x(hi, lo);

-       if (hi){
-               PrintAndLog ("EM410x XL pattern found");
-               return 0;
-       }

        g_em410xid = lo;
        return 1;
 }
 
        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)
 {
 // emulate an EM410X tag
 int CmdEM410xSim(const char *Cmd)
 {


@@ -138,18 +133,15 @@ int CmdEM410xSim(const char *Cmd)
  *  Changed by martin, 4000 x 4 = 16000, 
  *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
 */
  *  Changed by martin, 4000 x 4 = 16000, 
  *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
 */

-int CmdEM410xWatch(const char *Cmd)
-{
+int CmdEM410xWatch(const char *Cmd) {

        do {
                if (ukbhit()) {
                        printf("\naborted via keyboard!\n");
                        break;
        do {
                if (ukbhit()) {
                        printf("\naborted via keyboard!\n");
                        break;

-               }
-               
+               }               

                CmdLFRead("s");
                CmdLFRead("s");

-               getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9)        
+               getSamples("6144",true);

        } while (!CmdEM410xRead(""));
        } while (!CmdEM410xRead(""));

-

        return 0;
 }
 
        return 0;
 }
 


@@ -159,7 +151,7 @@ int CmdEM410xWatchnSpoof(const char *Cmd)
 {
        // loops if the captured ID was in XL-format.
        CmdEM410xWatch(Cmd);
 {
        // loops if the captured ID was in XL-format.
        CmdEM410xWatch(Cmd);

-       PrintAndLog("# Replaying captured ID: %llu", g_em410xid);
+       PrintAndLog("# Replaying captured ID: %" PRIu64 , g_em410xid);

        CmdLFaskSim("");
        return 0;
 }
        CmdLFaskSim("");
        return 0;
 }


@@ -225,30 +217,109 @@ int CmdEM410xWrite(const char *Cmd)
 
 bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType)
 {
 
 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];
                }
        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)
 {
 }
 
 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];
                }
        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;
+}
+
+// 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;
+               }

        }
        }

-       return true;
+       // 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)
 }
 
 uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest)


@@ -283,6 +354,8 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool
        }
        return code;
 }
        }
        return code;
 }

+
+

 /* Read the transmitted data of an EM4x50 tag from the graphbuffer
  * Format:
  *
 /* Read the transmitted data of an EM4x50 tag from the graphbuffer
  * Format:
  *


@@ -303,9 +376,7 @@ 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
  * Word Read values. UID is stored in block 32.
  */
  //completed by Marshmellow

-int EM4x50Read(const char *Cmd, bool verbose)
-{
-
+int EM4x50Read(const char *Cmd, bool verbose) {

        uint8_t fndClk[] = {8,16,32,40,50,64,128};
        int clk = 0; 
        int invert = 0;
        uint8_t fndClk[] = {8,16,32,40,50,64,128};
        int clk = 0; 
        int invert = 0;


@@ -372,7 +443,7 @@ int EM4x50Read(const char *Cmd, bool verbose)
                        }
                }
                if (!clk) {
                        }
                }
                if (!clk) {

-                       PrintAndLog("ERROR: EM4x50 - didn't find a clock");
+                       if (verbose || g_debugMode) PrintAndLog("ERROR: EM4x50 - didn't find a clock");

                        return 0;
                }
        } else tol = clk/8;
                        return 0;
                }
        } else tol = clk/8;


@@ -496,161 +567,223 @@ int EM4x50Read(const char *Cmd, bool verbose)
 }
 
 int CmdEM4x50Read(const char *Cmd) {
 }
 
 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);
 }
        return EM4x50Read(Cmd, true);
 }

-
-int usage_lf_em_read(void) {
-       PrintAndLog("Read EM4x05/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");
+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;
 }
        return 0;
 }

-
-//search for given preamble in given BitStream and return success=1 or fail=0 and startIndex
-uint8_t EMpreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t size, size_t *startIdx)
-{
-       // Sanity check.  If preamble length is bigger than bitstream length.
-       if ( size <= pLen ) return 0;
-       // em only sends preamble once, so look for it once in the first x bits
-       uint8_t foundCnt = 0;
-       for (int idx = 0; idx < size - pLen; idx++){
-               if (memcmp(BitStream+idx, preamble, pLen) == 0){
-                       //first index found
-                       foundCnt++;
-                       if (foundCnt == 1) {
-                               *startIdx = idx;
-                               return 1;
-                       }
-               }
-       }
+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;
 }
 
        return 0;
 }
 

-int demodEM4x05resp(uint8_t bitsNeeded) {
-       int ans = 0;
-       bool demodFound = false;
-       DemodBufferLen = 0x00;
-       // skip first two 0 bits as they might have been missed in the demod 
-       uint8_t preamble[6] = {0,0,1,0,1,0};
-
-       // test for FSK wave (easiest to 99% ID)
-       if (GetFskClock("", FALSE, FALSE)) {
-               //valid fsk clocks found
-               ans = FSKrawDemod("0 0", false);
-               if (!ans) {
-                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed");
-                       //return -1;
-               } else {
-                       // set size to 10 to only test first 4 positions for the preamble
-                       size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
-                       size_t startIdx = 0; 
-
-                       if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size);
-
-                       uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
-                       if ( errChk == 0) {
-                               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
-                               //return -1;
-                       } else {
-                               //can't test size because the preamble doesn't repeat :(
-                               //meaning chances of false positives are high.
-                               demodFound = true;
-                       }
-               }
+#define EM_PREAMBLE_LEN 6
+// download samples from device and copy 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;
+}

 
 

-       ans = GetPskClock("", FALSE, FALSE);
-       if (ans>0) {
-               PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod");
+// em_demod 
+bool doPreambleSearch(size_t *startIdx){
+       
+       // sanity check
+       if ( DemodBufferLen < EM_PREAMBLE_LEN) {
+               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 demodbuffer too small");
+               return FALSE;

        }
 
        }
 

-       if (!demodFound) {
-               DemodBufferLen = 0x00;
-               //try biphase
-               ans = ASKbiphaseDemod("0 0 1", FALSE);
-               if (!ans) { 
-                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed");
-                       //return -1;
-               } else {
-                       // set size to 10 to only test first 4 positions for the preamble
-                       size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
-                       size_t startIdx = 0; 
-
-                       if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size);
+       // set size to 20 to only test first 14 positions for the preamble
+       size_t size = (20 > DemodBufferLen) ? DemodBufferLen : 20;
+       *startIdx = 0; 
+       // 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};
+       
+       if ( !preambleSearchEx(DemodBuffer, preamble, EM_PREAMBLE_LEN, &size, startIdx, TRUE)) {
+               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx);
+               return FALSE;
+       } 
+       return TRUE;
+}

 
 

-                       uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
-                       if ( errChk == 0) {
-                               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
-                               //return -1;
-                       } else {
-                               //can't test size because the preamble doesn't repeat :(
-                               //meaning chances of false positives are high.
-                               demodFound = true;
-                       }
-               }
+bool detectFSK(){
+       // detect fsk clock
+       if (!GetFskClock("", FALSE, FALSE)) {
+               if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK clock failed");
+               return FALSE;

        }
        }

-
-       if (!demodFound) {
-               DemodBufferLen = 0x00;
-               // try manchester - NOTE: ST only applies to T55x7 tags.
-               ans = ASKDemod_ext("0,0,1", false, false, 1, 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 (!ans) {

-                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
-                       //return -1;
-               } else {
-                       // set size to 10 to only test first 4 positions for the preamble
-                       size_t size = (10 > DemodBufferLen) ? DemodBufferLen : 10;
-                       size_t startIdx = 0; 
-
-                       if (g_debugMode) PrintAndLog("ANS: %d | %u | %u", ans, startIdx, size);
-
-                       uint8_t errChk = !EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx);
-                       if ( errChk == 0) {
-                               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
-                               //return -1;
-                       } else {
-                               //can't test size because the preamble doesn't repeat :(
-                               //meaning chances of false positives are high.
-                               demodFound = true;
-                       }
+                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 inverted Demod failed");
+                       return FALSE;

                }
        }
                }
        }

-
-       if (demodFound && bitsNeeded < DemodBufferLen) {
-               setDemodBuf(DemodBuffer + ans + sizeof(preamble), bitsNeeded, 0);
-               CmdPrintDemodBuff("x");
-               return 1;
+       // 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 -1;
+       return TRUE;

 }
 
 }
 

-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();
+// param: idx - start index in demoded data.
+bool setDemodBufferEM(uint32_t *word, size_t idx){

 
 

-       addr = param_get8ex(Cmd, 0, -1, 10);
-       pwd =  param_get32ex(Cmd, 1, -1, 16);
-       
-       if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
-               PrintAndLog("Address must be between 0 and 15");
-               return 1;
+       //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;

        }
        }

-       if ( pwd == -1 )
-               PrintAndLog("Reading address %d", addr);
-       else {
-               usePwd = true;
-               PrintAndLog("Reading address %d | password %08X", addr, pwd);
+                  
+    // test for even parity bits and remove them. (leave out the end row of parities so 36 bits)       
+       if (!removeParity(DemodBuffer, idx + EM_PREAMBLE_LEN, 9, 0, 36)) {
+               if (g_debugMode) PrintAndLog("DEBUG: Error - EM, failed removing parity");
+               return FALSE;

        }
        }

+       setDemodBuf(DemodBuffer, 32, 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; 
+       *word = 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 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 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 usage_lf_em4x05_info(void) {
+       PrintAndLog("Tag information EM4205/4305/4469//4569 tags.  Tag must be on antenna.");
+       PrintAndLog("");
+       PrintAndLog("Usage:  lf em 4x05info [h] <pwd>");
+       PrintAndLog("Options:");
+       PrintAndLog("       h         - this help");
+       PrintAndLog("       pwd       - password (hex) (optional)");
+       PrintAndLog("samples:");
+       PrintAndLog("      lf em 4x05info");
+       PrintAndLog("      lf em 4x05info deadc0de");
+       return 0;
+}
+
+int EM4x05ReadWord_ext(uint8_t addr, uint32_t pwd, bool usePwd, uint32_t *word) {

        UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
        clearCommandBuffer();
        SendCommand(&c);
        UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
        clearCommandBuffer();
        SendCommand(&c);


@@ -659,60 +792,99 @@ int CmdReadWord(const char *Cmd) {
                PrintAndLog("Command timed out");
                return -1;
        }
                PrintAndLog("Command timed out");
                return -1;
        }

-       
-       uint8_t got[6000];
-       GetFromBigBuf(got, sizeof(got), 0);
-       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) {
-               PrintAndLog("command execution time out");
+       if ( !downloadSamplesEM() ) {

                return -1;
        }
                return -1;
        }

-       setGraphBuf(got, sizeof(got));

        int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
        if (graphJustNoise(GraphBuffer, testLen)) {
        int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
        if (graphJustNoise(GraphBuffer, testLen)) {

-               PrintAndLog("no tag not found");
+               PrintAndLog("no tag found");

                return -1;
        }
                return -1;
        }

+       return demodEM4x05resp(word);
+}
+
+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();

 
 

-       //need 32 bits for read word
-       demodEM4x05resp(32);
+       // for now use default input of 1 as invalid (unlikely 1 will be a valid password...)
+       pwd = param_get32ex(Cmd, 0, 1, 16);

        
        

-       return 1;
-}
+       if ( pwd != 1 )
+               usePwd = true;

 
 

-int usage_lf_em_write(void) {
-       PrintAndLog("Write EM4x05/EM4x69.  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;
+       int success = 1;
+       uint32_t word = 0;
+       PrintAndLog("Addr | data   | ascii");
+       PrintAndLog("-----+--------+------");
+       for (; addr < 16; addr++) {
+               
+               if (addr == 2) {
+                       if (usePwd) {
+                               PrintAndLog(" %02u | %08X", addr, pwd, word );
+                       } else {
+                               PrintAndLog(" 02 | cannot read");
+                       }
+               } else {
+                       success &= EM4x05ReadWord_ext(addr, pwd, usePwd, &word);
+               }
+       }
+
+       return success;

 }
 }

-int CmdWriteWord(const char *Cmd) {
+
+int CmdEM4x05Read(const char *Cmd) {
+       uint8_t addr;
+       uint32_t pwd;
+       bool usePwd = false;

        uint8_t ctmp = param_getchar(Cmd, 0);
        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_read();
+
+       addr = param_get8ex(Cmd, 0, 50, 10);
+       pwd =  param_get32ex(Cmd, 1, 1, 16);

        
        

-       bool usePwd = false;
-               
-       int addr = 16; // default to invalid address
-       int data = 0xFFFFFFFF; // default to blank data
-       int pwd = 0xFFFFFFFF; // default to blank password
+       if (addr > 15) {
+               PrintAndLog("Address must be between 0 and 15");
+               return 1;
+       }
+       if ( pwd == 1 ) {
+               PrintAndLog("Reading address %02u", addr);
+       }
+       else {
+               usePwd = true;
+               PrintAndLog("Reading address %02u | password %08X", addr, pwd);
+       }
+       
+       uint32_t word = 0;
+       int isOk = EM4x05ReadWord_ext(addr, pwd, usePwd, &word);
+       if (isOk)
+               PrintAndLog("Address %02d | %08X - %s", addr, word, (addr > 13) ? "Lock" : "");
+       else
+               PrintAndLog("Read Address %02d | failed",addr);
+       return isOk;
+}
+
+int CmdEM4x05Write(const char *Cmd) {
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_write();

        
        

-       addr = param_get8ex(Cmd, 0, -1, 10);
-       data = param_get32ex(Cmd, 1, -1, 16);
-       pwd =  param_get32ex(Cmd, 2, -1, 16);
+       bool usePwd = false;            
+       uint8_t addr = 50; // default to invalid address
+       uint32_t data = 0; // default to blank data
+       uint32_t pwd = 1; // default to blank password

        
        

+       addr = param_get8ex(Cmd, 0, 50, 10);
+       data = param_get32ex(Cmd, 1, 0, 16);
+       pwd =  param_get32ex(Cmd, 2, 1, 16);

        
        

-       if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
+       if ( addr > 15 ) {

                PrintAndLog("Address must be between 0 and 15");
                return 1;
        }
                PrintAndLog("Address must be between 0 and 15");
                return 1;
        }

-       if ( pwd == -1 )
+       if ( pwd == 1 )

                PrintAndLog("Writing address %d data %08X", addr, data);        
        else {
                usePwd = true;
                PrintAndLog("Writing address %d data %08X", addr, data);        
        else {
                usePwd = true;


@@ -725,54 +897,187 @@ int CmdWriteWord(const char *Cmd) {
        clearCommandBuffer();
        SendCommand(&c);
        UsbCommand resp;        
        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;
        }
        
                PrintAndLog("Error occurred, device did not respond during write operation.");
                return -1;
        }
        

-       //get response if there is one
-       uint8_t got[6000]; // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples)
-       GetFromBigBuf(got, sizeof(got), 0);
-       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 8000) ) {
-               PrintAndLog("command execution time out");
-               return -2;
+       if (!downloadSamplesEM())
+               return -1;
+
+       //need 0 bits demoded (after preamble) to verify write cmd
+       uint32_t dummy = 0;
+       int isOk = demodEM4x05resp(&dummy);
+       if (isOk)
+               PrintAndLog("Write Verified");
+       else
+               PrintAndLog("Write could not be verified");     
+       return isOk;
+}
+
+void printEM4x05config(uint32_t wordData) {
+       uint16_t datarate = (((wordData & 0x3F)+1)*2);
+       uint8_t encoder = ((wordData >> 6) & 0xF);
+       char enc[14];
+       memset(enc,0,sizeof(enc));
+
+       uint8_t PSKcf = (wordData >> 10) & 0x3;
+       char cf[10];
+       memset(cf,0,sizeof(cf));
+       uint8_t delay = (wordData >> 12) & 0x3;
+       char cdelay[33];
+       memset(cdelay,0,sizeof(cdelay));
+       uint8_t LWR = (wordData >> 14) & 0xF; //last word read
+
+       switch (encoder) {
+               case 0: snprintf(enc,sizeof(enc),"NRZ"); break;
+               case 1: snprintf(enc,sizeof(enc),"Manchester"); break;
+               case 2: snprintf(enc,sizeof(enc),"Biphase"); break;
+               case 3: snprintf(enc,sizeof(enc),"Miller"); break;
+               case 4: snprintf(enc,sizeof(enc),"PSK1"); break;
+               case 5: snprintf(enc,sizeof(enc),"PSK2"); break;
+               case 6: snprintf(enc,sizeof(enc),"PSK3"); break;
+               case 7: snprintf(enc,sizeof(enc),"Unknown"); break;
+               case 8: snprintf(enc,sizeof(enc),"FSK1"); break;
+               case 9: snprintf(enc,sizeof(enc),"FSK2"); break;
+               default: snprintf(enc,sizeof(enc),"Unknown"); break;

        }
        }

-       setGraphBuf(got, sizeof(got));
+
+       switch (PSKcf) {
+               case 0: snprintf(cf,sizeof(cf),"RF/2"); break;
+               case 1: snprintf(cf,sizeof(cf),"RF/8"); break;
+               case 2: snprintf(cf,sizeof(cf),"RF/4"); break;
+               case 3: snprintf(cf,sizeof(cf),"unknown"); break;
+       }
+
+       switch (delay) {
+               case 0: snprintf(cdelay, sizeof(cdelay),"no delay"); break;
+               case 1: snprintf(cdelay, sizeof(cdelay),"BP/8 or 1/8th bit period delay"); break;
+               case 2: snprintf(cdelay, sizeof(cdelay),"BP/4 or 1/4th bit period delay"); break;
+               case 3: snprintf(cdelay, sizeof(cdelay),"no delay"); break;
+       }
+       PrintAndLog("ConfigWord: %08X (Word 4)\n", wordData);
+       PrintAndLog("Config Breakdown:", wordData);
+       PrintAndLog(" Data Rate:  %02u | RF/%u", wordData & 0x3F, datarate);
+       PrintAndLog("   Encoder:   %u | %s", encoder, enc);
+       PrintAndLog("    PSK CF:   %u | %s", PSKcf, cf);
+       PrintAndLog("     Delay:   %u | %s", delay, cdelay);
+       PrintAndLog(" LastWordR:  %02u | Address of last word for default read", LWR);
+       PrintAndLog(" ReadLogin:   %u | Read Login is %s", (wordData & 0x40000)>>18, (wordData & 0x40000) ? "Required" : "Not Required");       
+       PrintAndLog("   ReadHKL:   %u | Read Housekeeping Words Login is %s", (wordData & 0x80000)>>19, (wordData & 0x80000) ? "Required" : "Not Required");    
+       PrintAndLog("WriteLogin:   %u | Write Login is %s", (wordData & 0x100000)>>20, (wordData & 0x100000) ? "Required" : "Not Required");    
+       PrintAndLog("  WriteHKL:   %u | Write Housekeeping Words Login is %s", (wordData & 0x200000)>>21, (wordData & 0x200000) ? "Required" : "Not Required"); 
+       PrintAndLog("    R.A.W.:   %u | Read After Write is %s", (wordData & 0x400000)>>22, (wordData & 0x400000) ? "On" : "Off");
+       PrintAndLog("   Disable:   %u | Disable Command is %s", (wordData & 0x800000)>>23, (wordData & 0x800000) ? "Accepted" : "Not Accepted");
+       PrintAndLog("    R.T.F.:   %u | Reader Talk First is %s", (wordData & 0x1000000)>>24, (wordData & 0x1000000) ? "Enabled" : "Disabled");
+       PrintAndLog("    Pigeon:   %u | Pigeon Mode is %s\n", (wordData & 0x4000000)>>26, (wordData & 0x4000000) ? "Enabled" : "Disabled");
+}
+
+void printEM4x05info(uint32_t block0, uint32_t serial) {
+               
+       uint8_t chipType = (block0 >> 1) & 0xF;
+       uint8_t cap = (block0 >> 5) & 3;
+       uint16_t custCode = (block0 >> 9) & 0x3FF;

        
        

-       int ans = 0;
-       //bool ST = true;
-       DemodBufferLen = 0x00;  
+       switch (chipType) {
+               case 9:  PrintAndLog("\n Chip Type:   %u | EM4305", chipType); break;
+               case 8:  PrintAndLog("\n Chip Type:   %u | EM4205", chipType); break;
+               case 4:  PrintAndLog(" Chip Type:   %u | Unknown", chipType); break;
+               case 2:  PrintAndLog(" Chip Type:   %u | EM4469", chipType); break;
+               //add more here when known
+               default: PrintAndLog(" Chip Type:   %u Unknown", chipType); break;
+       }

 
 

-       //ans = ASKDemod_ext("0 0 1", FALSE, FALSE, 1, &ST);
-       ans = ASKbiphaseDemod("0 0 1", FALSE);
-       if (!ans) { 
-               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
-               return -3;
+       switch (cap) {
+               case 3:  PrintAndLog("  Cap Type:   %u | 330pF",cap); break;
+               case 2:  PrintAndLog("  Cap Type:   %u | %spF",cap, (chipType==2)? "75":"210"); break;
+               case 1:  PrintAndLog("  Cap Type:   %u | 250pF",cap); break;
+               case 0:  PrintAndLog("  Cap Type:   %u | no resonant capacitor",cap); break;
+               default: PrintAndLog("  Cap Type:   %u | unknown",cap); break;
+       }
+
+       PrintAndLog(" Cust Code: %03u | %s", custCode, (custCode == 0x200) ? "Default": "Unknown");
+       if (serial != 0)
+               PrintAndLog("\n  Serial #: %08X\n", serial);
+}
+
+void printEM4x05ProtectionBits(uint32_t word) {
+       for (uint8_t i = 0; i < 15; i++) {
+               PrintAndLog("      Word:  %02u | %s", i, (((1 << i) & word ) || i < 2) ? "Is Write Locked" : "Is Not Write Locked");
+               if (i==14) 
+                       PrintAndLog("      Word:  %02u | %s", i+1, (((1 << i) & word ) || i < 2) ? "Is Write Locked" : "Is Not Write Locked");

        }
        }

+}
+
+//quick test for EM4x05/EM4x69 tag
+bool EM4x05IsBlock0(uint32_t *word) {
+       return EM4x05ReadWord_ext(0, 0, FALSE, word);
+}
+
+int CmdEM4x05Info(const char *Cmd) {
+#define EM_SERIAL_BLOCK 1
+#define EM_CONFIG_BLOCK 4
+#define EM_PROT1_BLOCK 14
+#define EM_PROT2_BLOCK 15
+       uint32_t pwd;
+       uint32_t word = 0, block0 = 0, serial = 0;
+       bool usePwd = false;
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_info();
+
+       // for now use default input of 1 as invalid (unlikely 1 will be a valid password...)
+       pwd = param_get32ex(Cmd, 0, 1, 16);

        
        

-       //todo: check response for 00001010 then write data for write confirmation!     
-       size_t startIdx = 0, size = DemodBufferLen; 
+       if ( pwd != 1 )
+               usePwd = true;

 
 

-       uint8_t preamble[8] = {0,0,0,0,1,0,1,0};                
-       if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
-               if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
-               return -4;
+       // read word 0 (chip info)
+       // block 0 can be read even without a password.
+       if ( !EM4x05IsBlock0(&block0) ) 
+               return -1;
+       
+       // read word 1 (serial #) doesn't need pwd
+       // continue if failed, .. non blocking fail.
+       EM4x05ReadWord_ext(EM_SERIAL_BLOCK, 0, false, &serial);
+       printEM4x05info(block0, serial);
+
+       // read word 4 (config block) 
+       // needs password if one is set
+       if ( EM4x05ReadWord_ext(EM_CONFIG_BLOCK, pwd, usePwd, &word) != 1 )
+               return 0;
+       
+       printEM4x05config(word);
+
+       // read word 14 and 15 to see which is being used for the protection bits
+       if ( EM4x05ReadWord_ext(EM_PROT1_BLOCK, pwd, usePwd, &word) != 1 ) {
+               return 0;

        }
        }

-       PrintAndLog("Write OK");
-       return 0;
+       // if status bit says this is not the used protection word
+       if (!(word & 0x8000)) {
+               if ( EM4x05ReadWord_ext(EM_PROT2_BLOCK, pwd, usePwd, &word) != 1 )
+                       return 0;
+       }
+       //something went wrong
+       if (!(word & 0x8000)) return 0;
+       printEM4x05ProtectionBits(word);
+       return 1;

 }
 
 static command_t CommandTable[] = {
        {"help",                CmdHelp,                        1, "This help"},
 }
 
 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"},
+       {"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, "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"},
+       {"4x05dump",    CmdEM4x05Dump,          0, "dump EM4205/4305 tag"},
+       {"4x05info",    CmdEM4x05Info,      0, "tag information EM4x05/EM4x69"},
+       {"4x05read",    CmdEM4x05Read,          0, "read word data from EM4205/4305"},
+       {"4x05write",   CmdEM4x05Write,         0, "write word data to EM4205/4305"},
+       {"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}
 };
 
        {NULL, NULL, 0, NULL}
 };