the timeout on lf read makes the threshold ...

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 0788b13852a2d17592382267403fda4efdd25703..38bb5c5d19ee7e6b6f0a10c8c20792146e8efb26 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -63,6 +63,20 @@ int CmdEM410xRead(const char *Cmd)
        return 1;
 }
 
+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;
+}
+
 // emulate an EM410X tag
 int CmdEM410xSim(const char *Cmd)
 {
@@ -71,12 +85,7 @@ int CmdEM410xSim(const char *Cmd)
        char cmdp = param_getchar(Cmd, 0);
        uint8_t uid[5] = {0x00};
 
-       if (cmdp == 'h' || cmdp == 'H') {
-               PrintAndLog("Usage:  lf em 410xsim <UID> <clock>");
-               PrintAndLog("");
-               PrintAndLog("     sample: lf em 410xsim 0F0368568B");
-               return 0;
-       }
+       if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim();
        /* clock is 64 in EM410x tags */
        uint8_t clock = 64;
 
@@ -540,7 +549,7 @@ bool EM4x05testDemodReadData(uint32_t *word, bool readCmd) {
        // sanity check
        size = (size > DemodBufferLen) ? DemodBufferLen : size;
        // test preamble
-       if ( !onePreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx) ) {
+       if ( !preambleSearchEx(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx, true) ) {
                if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx);
                return false;
        }
@@ -550,13 +559,13 @@ bool EM4x05testDemodReadData(uint32_t *word, bool readCmd) {
                        if (g_debugMode) PrintAndLog("DEBUG: Error - End Parity check failed");
                        return false;
                }
-               // test for even parity bits.
-               if ( removeParity(DemodBuffer, startIdx + sizeof(preamble),9,0,44) == 0 ) {             
+               // test for even parity bits and remove them. (leave out the end row of parities so 36 bits)
+               if ( removeParity(DemodBuffer, startIdx + sizeof(preamble),9,0,36) == 0 ) {             
                        if (g_debugMode) PrintAndLog("DEBUG: Error - Parity not detected");
                        return false;
                }
 
-               setDemodBuf(DemodBuffer, 40, 0);
+               setDemodBuf(DemodBuffer, 32, 0);
                *word = bytebits_to_byteLSBF(DemodBuffer, 32);
        }
        return true;