EM4x05/EM4x69 continued + a couple of icemans utils.

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index aa0fc856e002b20e2c3e882341bff765b1d74416..7d8d2931aa0ea186d88898a6f1f34530c3e4e4a6 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -18,6 +18,7 @@
 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdlf.h"
 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdlf.h"

+#include "cmdmain.h"

 #include "cmdlfem4x.h"
 #include "lfdemod.h"
 
 #include "cmdlfem4x.h"
 #include "lfdemod.h"
 


@@ -285,7 +286,7 @@ 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
+/* Read the transmitted data of an EM4x50 tag from the graphbuffer

  * Format:
  *
  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity
  * Format:
  *
  *  XXXXXXXX [row parity bit (even)] <- 8 bits plus parity


@@ -498,53 +499,282 @@ int CmdEM4x50Read(const char *Cmd)
        return EM4x50Read(Cmd, true);
 }
 
        return EM4x50Read(Cmd, true);
 }
 

-int CmdReadWord(const char *Cmd)
+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");
+       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)

 {
 {

-       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");
+       // 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;
+                       }
+               }
+       }
+       return 0;
+}
+
+// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE 
+// should cover 90% of known used configs
+// the rest will need to be manually demoded for now...
+int demodEM4x05resp(uint8_t bitsNeeded) {
+       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");
+               } 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);
+                       } else {
+                               //can't test size because the preamble doesn't repeat :(
+                               //meaning chances of false positives are high.
+                               demodFound = true;
+                       }
+               }
+       }
+       // PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... )
+       if (!demodFound) {
+               ans = GetPskClock("", FALSE, FALSE);
+               if (ans>0) {
+                       PrintAndLog("PSK response possibly found, run `data rawd p1` to attempt to demod");
+               }
+       }
+
+       // more common than biphase
+       if (!demodFound) {
+               DemodBufferLen = 0x00;
+               // try manchester - NOTE: ST only applies to T55x7 tags.
+               ans = ASKDemod_ext("0,0,1", false, false, 1, false);
+               if (!ans) {
+                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed");
+               } 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);
+                       } else {
+                               //can't test size because the preamble doesn't repeat :(
+                               //meaning chances of false positives are high.
+                               demodFound = true;
+                       }
+               }
+       }
+
+       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");
+               } 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);
+                       } else {
+                               //can't test size because the preamble doesn't repeat :(
+                               //meaning chances of false positives are high.
+                               demodFound = true;
+                       }
+               }
+       }
+
+       if (!demodFound) {
+               DemodBufferLen = 0x00;
+               //try diphase (differential biphase or inverted)
+               ans = ASKbiphaseDemod("0 1 1", FALSE);
+               if (!ans) { 
+                       if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed");
+               } 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);
+                       } else {
+                               //can't test size because the preamble doesn't repeat :(
+                               //meaning chances of false positives are high.
+                               demodFound = true;
+                       }
+               }
+       }
+
+       if (demodFound && bitsNeeded < DemodBufferLen) {
+               if (bitsNeeded > 0) {
+                       setDemodBuf(DemodBuffer + ans + sizeof(preamble), bitsNeeded, 0);
+                       CmdPrintDemodBuff("x");                 
+               }

                return 1;
        }
                return 1;
        }

+       return -1;
+}
+
+int CmdReadWord(const char *Cmd) {
+       int addr, pwd;
+       bool usePwd = false;
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_read();
+
+       addr = param_get8ex(Cmd, 0, -1, 10);
+       pwd =  param_get32ex(Cmd, 1, -1, 16);

        
        

-       PrintAndLog("Reading word %d", Word);
+       if ( (addr > 15) || (addr < 0 ) || ( addr == -1) ) {
+               PrintAndLog("Address must be between 0 and 15");
+               return 1;
+       }
+       if ( pwd == -1 )
+               PrintAndLog("Reading address %d", addr);
+       else {
+               usePwd = true;
+               PrintAndLog("Reading address %d | password %08X", addr, pwd);
+       }

        
        

-       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;
+       UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}};
+       clearCommandBuffer();

        SendCommand(&c);
        SendCommand(&c);

+       UsbCommand resp;        
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){
+               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");
+               return -1;
+       }
+       setGraphBuf(got, sizeof(got));
+       int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000;
+       if (graphJustNoise(GraphBuffer, testLen)) {
+               PrintAndLog("no tag not found");
+               return -1;
+       }
+
+       //attempt demod:
+       //need 32 bits from a read word
+       return demodEM4x05resp(32);
+}
+
+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;
 }
 
        return 0;
 }
 

-int CmdReadWordPWD(const char *Cmd)
-{
-       int Word = -1; //default to invalid word
-       int Password = 0xFFFFFFFF; //default to blank password
-       UsbCommand c;
+int CmdWriteWord(const char *Cmd) {
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_write();

        
        

-       sscanf(Cmd, "%d %x", &Word, &Password);
+       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 ( (Word > 15) | (Word < 0) ) {
-               PrintAndLog("Word must be between 0 and 15");
+       addr = param_get8ex(Cmd, 0, -1, 10);
+       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;
        }
                return 1;
        }

+       if ( pwd == -1 )
+               PrintAndLog("Writing address %d data %08X", addr, data);        
+       else {
+               usePwd = true;
+               PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd);               
+       }

        
        

-       PrintAndLog("Reading word %d with password %08X", Word, Password);
+       uint16_t flag = (addr << 8 ) | usePwd;

        
        

-       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;
+       UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}};
+       clearCommandBuffer();

        SendCommand(&c);
        SendCommand(&c);

-       return 0;
+       UsbCommand resp;        
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+               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 0;
+       }
+       setGraphBuf(got, sizeof(got));
+       //todo: check response for 00001010 then write data for write confirmation!
+       
+       //attempt demod:
+       //need 0 bits demoded (after preamble) to verify write cmd
+       int result = demodEM4x05resp(0);
+       if (result == 1) {
+               PrintAndLog("Write Verified");
+       }
+       return result;

 }
 
 }
 

+/*

 int CmdWriteWord(const char *Cmd)
 {
        int Word = 16; //default to invalid block
 int CmdWriteWord(const char *Cmd)
 {
        int Word = 16; //default to invalid block


@@ -593,7 +823,7 @@ int CmdWriteWordPWD(const char *Cmd)
        SendCommand(&c);
        return 0;
 }
        SendCommand(&c);
        return 0;
 }

-
+*/

 static command_t CommandTable[] =
 {
        {"help", CmdHelp, 1, "This help"},
 static command_t CommandTable[] =
 {
        {"help", CmdHelp, 1, "This help"},


@@ -603,11 +833,11 @@ static command_t CommandTable[] =
        {"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"},
        {"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"},
+       {"em4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graph buffer"},
+       {"readword", CmdReadWord, 1, "<Word> (pwd) -- Read EM4x05/EM4x69 word data"},
+       //{"readwordPWD", CmdReadWordPWD, 1, "<Word> <Password> -- Read EM4xxx word data in password mode"},
+       {"writeword", CmdWriteWord, 1, "<Word> <data> (pwd) -- Write EM4x05/EM4x69 word data"},
+       //{"writewordPWD", CmdWriteWordPWD, 1, "<Data> <Word> <Password> -- Write EM4xxx word data in password mode"},

        {NULL, NULL, 0, NULL}
 };
 
        {NULL, NULL, 0, NULL}
 };