FIX: 'data print' - now don't crash the client when demodbuffer is empty

[proxmark3-svn] / common / lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index c35ce561881757cc4b3d15c7114c3187f86acf0d..b45a4097a6d536cc29c97327482366fb50ae8cce 100644 (file)
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -602,10 +602,11 @@ int HIDdemodFSK(uint8_t *dest, size_t *size, uint32_t *hi2, uint32_t *hi, uint32
                *hi2 = (*hi2<<1)|(*hi>>31);
                *hi = (*hi<<1)|(*lo>>31);
                //Then, shift in a 0 or one into low
+               *lo <<= 1;
                if (dest[idx] && !dest[idx+1])  // 1 0
-                       *lo=(*lo<<1)|1;
+                       *lo |= 1;
                else // 0 1
-                       *lo=(*lo<<1)|0;
+                       *lo |= 0;
        }
        return (int)startIdx;
 }
@@ -822,6 +823,19 @@ int NedapDemod(uint8_t *dest, size_t *size) {
        return (int) startIdx;
 }
 
+// Find IDTEC PSK1, RF  Preamble == 0x4944544B, Demodsize 64bits
+// by iceman
+int IdteckDemodPSK(uint8_t *dest, size_t *size) {
+       //make sure buffer has data
+       if (*size < 64*2) return -1;    
+       size_t startIdx = 0;
+       uint8_t preamble[] = {0,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,1,0,0,0,1,0,0,1,0,1,1};
+       uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
+       if (errChk == 0) return -2; //preamble not found
+       if (*size != 64) return -3; // wrong demoded size
+       return (int) startIdx;
+}
+
 // by marshmellow
 // to detect a wave that has heavily clipped (clean) samples
 uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low)