reveng -g (model search given just hexstr with crc)

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index e23b6d5979b1759aa7608e73684440f73a8032ec..cf105f88b993b216741720d675d8cfcbfda3c78d 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -23,6 +23,7 @@
 #include "lfdemod.h"
 #include "usb_cmd.h"
 #include "crc.h"
+#include "crc16.h"
 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 uint8_t g_debugMode;
@@ -40,7 +41,7 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
                size = MAX_DEMOD_BUF_LEN;
 
        size_t i = 0;
-       for (; i < size; i++){
+for (; i < size; i++){
                DemodBuffer[i]=buff[startIdx++];
        }
        DemodBufferLen=size;
@@ -118,7 +119,7 @@ int CmdPrintDemodBuff(const char *Cmd)
        int numBits = (DemodBufferLen-offset) & 0x7FC; //make sure we don't exceed our string
 
        if (hexMode){
-               char *buf = DemodBuffer + offset;
+               char *buf = (char *) (DemodBuffer + offset);
                numBits = binarraytohex(hex, buf, numBits);
                if (numBits==0) return 0;
                PrintAndLog("DemodBuffer: %s",hex);             
@@ -498,9 +499,9 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
 {
        //ask raw demod GraphBuffer first
        int offset=0, clk=0, invert=0, maxErr=0, ans=0;
-       ans = sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
+       ans = sscanf(Cmd, "%i %i 0 %i", &offset, &clk, &maxErr);
        if (ans>0)
-               ans = ASKDemod(Cmd+1, FALSE, FALSE, 0);
+               ans = ASKDemod(Cmd+2, FALSE, FALSE, 0);
        else
                ans = ASKDemod(Cmd, FALSE, FALSE, 0);
        if (!ans) {
@@ -512,7 +513,7 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
        size_t size = DemodBufferLen;
        uint8_t BitStream[MAX_DEMOD_BUF_LEN];
        memcpy(BitStream, DemodBuffer, DemodBufferLen); 
-       int errCnt = BiphaseRawDecode(BitStream, &size, offset, 0);
+       int errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
        if (errCnt < 0){
                if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
                return 0;
@@ -1457,6 +1458,83 @@ int CmdFSKdemodPyramid(const char *Cmd)
        return 1;
 }
 
+// FDX-B ISO11784/85 demod  (aka animal tag)  BIPHASE, inverted, rf/32,  with preamble of 00000000001 (128bits)
+// 8 databits + 1 parity (1)
+// CIITT 16 chksum
+// NATIONAL CODE, ICAR database
+// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
+// FLAG (animal/non-animal)
+int CmdFDXBdemodBI(const char *Cmd){
+
+       int invert = 1;
+       int clk = 32;           
+       int errCnt = 0;
+       int maxErr = 0;
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];   
+       size_t size = getFromGraphBuf(BitStream);       
+       
+       errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
+       if ( errCnt < 0 || errCnt > maxErr ) { 
+               if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
+               return 0;
+       }
+
+       errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
+       if (errCnt < 0 || errCnt > maxErr ) {
+               if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+               return 0;
+       } 
+
+       int preambleIndex = FDXBdemodBI(BitStream, &size);
+       if (preambleIndex < 0){
+               if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
+               return 0;
+       }
+
+       setDemodBuf(BitStream, 128, preambleIndex);
+
+       // remove but don't verify parity. (pType = 2)
+       size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
+       if ( size <= 103 ) {
+               if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
+               return 0;
+       }
+       if (g_debugMode) {
+               char *bin = sprint_bin_break(BitStream,size,16);
+               PrintAndLog("DEBUG BinStream:\n%s",bin);
+       }
+       PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
+       if (g_debugMode) PrintAndLog("Start marker %d;   Size %d", preambleIndex, size);
+
+       //got a good demod
+       uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
+       uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
+       uint8_t dataBlockBit = BitStream[48];
+       uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
+       uint8_t animalBit = BitStream[63];
+       uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
+       uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
+
+       uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
+       uint8_t raw[8];
+       num_to_bytes(rawid, 8, raw);
+
+       if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
+
+       uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
+       PrintAndLog("Animal ID:     %04u-%012llu", countryCode, NationalCode);
+       PrintAndLog("National Code: %012llu", NationalCode);
+       PrintAndLog("CountryCode:   %04u", countryCode);
+       PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
+       PrintAndLog("reserved Code: %u", reservedCode);
+       PrintAndLog("Animal Tag:    %s", animalBit ? "True" : "False");
+       PrintAndLog("CRC:           0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
+       PrintAndLog("Extended:      0x%X\n", extended);
+       
+       return 1;
+}
+
+
 //by marshmellow
 //attempt to psk1 demod graph buffer
 int PSKDemod(const char *Cmd, bool verbose)
@@ -2201,6 +2279,7 @@ static command_t CommandTable[] =
        {"buffclear",       CmdBuffClear,       1, "Clear sample buffer and graph window"},
        {"dec",             CmdDec,             1, "Decimate samples"},
        {"detectclock",     CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
+       {"fdxbdemod",       CmdFDXBdemodBI    , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
        {"fskawiddemod",    CmdFSKdemodAWID,    1, "Demodulate an AWID FSK tag from GraphBuffer"},
        //{"fskfcdetect",   CmdFSKfcDetect,     1, "Try to detect the Field Clock of an FSK wave"},
        {"fskhiddemod",     CmdFSKdemodHID,     1, "Demodulate a HID FSK tag from GraphBuffer"},