Merge pull request #117 from marshmellow42/master

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index dad0a71195311433f32686abc954cd1d1bb1b9e3..309044e10d48cefe327f028d83c4d13bca9e170c 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;
@@ -343,8 +344,8 @@ int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType)
        setDemodBuf(BitStream,BitLen,0);
        if (verbose || g_debugMode){
                if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
-               if (askType) PrintAndLog("ASK/Manchester decoded bitstream:");
-               else PrintAndLog("ASK/Raw decoded bitstream:");
+               if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
+               else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
                // Now output the bitstream to the scrollback by line of 16 bits
                printDemodBuff();
                
@@ -497,22 +498,20 @@ int CmdBiphaseDecodeRaw(const char *Cmd)
 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 0 %i", &offset, &clk, &maxErr);
-       if (ans>0)
-               ans = ASKDemod(Cmd+2, FALSE, FALSE, 0);
-       else
-               ans = ASKDemod(Cmd, FALSE, FALSE, 0);
-       if (!ans) {
-               if (g_debugMode || verbose) PrintAndLog("Error AskDemod: %d", ans);
-               return 0;
-       }
+       int offset=0, clk=0, invert=0, maxErr=0;
+       sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
+
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];     
+       size_t size = getFromGraphBuf(BitStream);         
+       //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
+       int 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;  
+       } 
 
-       //attempt to Biphase decode DemodBuffer
-       size_t size = DemodBufferLen;
-       uint8_t BitStream[MAX_DEMOD_BUF_LEN];
-       memcpy(BitStream, DemodBuffer, DemodBufferLen); 
-       int errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
+       //attempt to Biphase decode BitStream
+       errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
        if (errCnt < 0){
                if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
                return 0;
@@ -524,7 +523,7 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
        //success set DemodBuffer and return
        setDemodBuf(BitStream, size, 0);
        if (g_debugMode || verbose){
-               PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
+               PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
                printDemodBuff();
        }
        return 1;
@@ -1474,7 +1473,7 @@ int CmdFDXBdemodBI(const char *Cmd){
        
        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: 32", errCnt);
+               if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
                return 0;
        }
 
@@ -1491,8 +1490,8 @@ int CmdFDXBdemodBI(const char *Cmd){
        }
 
        setDemodBuf(BitStream, 128, preambleIndex);
-       //printDemodBuff();
 
+       // 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);
@@ -1503,9 +1502,8 @@ int CmdFDXBdemodBI(const char *Cmd){
                PrintAndLog("DEBUG BinStream:\n%s",bin);
        }
        PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
-       if (g_debugMode) PrintAndLog("startmarker %d;   Size %d", preambleIndex, size);
+       if (g_debugMode) PrintAndLog("Start marker %d;   Size %d", preambleIndex, size);
 
-       //return 1;
        //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);
@@ -1515,14 +1513,21 @@ int CmdFDXBdemodBI(const char *Cmd){
        uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
        uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
 
-       PrintAndLog("Animal ID:     %u-%012llu", countryCode, NationalCode);
+       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:   %u", countryCode);
+       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%02X", crc16);
-       PrintAndLog("Extended:      0x%X", extended);
+       PrintAndLog("CRC:           0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
+       PrintAndLog("Extended:      0x%X\n", extended);
        
        return 1;
 }