FIX: the cmdline parsing was a bit too hard. Thanks to @crayon for pointing out...

[proxmark3-svn] / common / lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index 2f376e5f2f02438c8f4f55a3b2fdff1e11febcf6..7e31f53dcccb66b04e3c5d04b809cf5f20308477 100644 (file)
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -732,21 +732,27 @@ int JablotronDemod(uint8_t *dest, size_t *size){
 
        size_t startIdx = 0;
        // 0xFFFF preamble, 64bits
-       uint8_t preamble[] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
+       uint8_t preamble[] = {
+                       1,1,1,1,
+                   1,1,1,1,
+                               1,1,1,1,
+                               1,1,1,1,
+                               0
+               };
 
        uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
        if (errChk == 0) return -4; //preamble not found
+       if (*size != 64) return -3;
        
-       uint8_t checkCalc = 0;
+       uint8_t checkchksum = 0;
        for (int i=16; i < 56; i += 8) {
-               checkCalc += bytebits_to_byte(dest+startIdx+i,8);
+               checkchksum += bytebits_to_byte(dest+startIdx+i,8);
        }
-       checkCalc ^= 0x3A;
+       checkchksum ^= 0x3A;
 
-       uint8_t crc = bytebits_to_byte(dest+startIdx+56,8);
+       uint8_t crc = bytebits_to_byte(dest+startIdx+56, 8);
        
-       if ( checkCalc != crc ) return -5;      
-       if (*size != 64) return -6;
+       if ( checkchksum != crc ) return -5;    
        return (int)startIdx;
 }