FIX: Coverity, CID#121314, Explicit null dereferenced, in really odd occasions...

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 159929b5858234b3fc61d24308dcb430d8ab9212..de6443cfcd7ab48a3c927c91b6f884f32ad3171d 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -137,7 +137,7 @@ char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t brea
 
        size_t in_index = 0;
        // loop through the out_index to make sure we don't go too far
-       for (size_t out_index=0; out_index < max_len; out_index++) {
+       for (size_t out_index=0; out_index < max_len-2; out_index++) {
                // set character
                sprintf(tmp++, "%u", data[in_index]);
                // check if a line break is needed and we have room to print it in our array
@@ -194,7 +194,7 @@ void num_to_bytebits(uint64_t       n, size_t len, uint8_t *dest) {
 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
 // up to 64 bytes or 512 bits
 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
-       static uint8_t buf[64];
+       uint8_t buf[64];
        memset(buf, 0x00, 64);
        uint8_t *tmp = buf;
        for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
@@ -205,6 +205,15 @@ uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockS
        return tmp;
 }
 
+void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
+       for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
+               for (size_t i = 0; i < blockSize; i++){
+                       dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
+               }
+       }
+}
+
+
 //  -------------------------------------------------------------------------
 //  string parameters lib
 //  -------------------------------------------------------------------------
@@ -454,11 +463,9 @@ void binarraytobinstring(char *target, char *source,  int length)
 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
 {
     int x;
-
-    for(x= 0 ; length > 0 ; --length)
+    for( x = 0 ; length > 0 ; --length)
         x += bits[length - 1];
     x %= 2;
-
     return x ^ type;
 }
 
@@ -494,7 +501,8 @@ uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
        return tmp;
 }
 
-// RotateLeft - Ultralight, Desfire
+// RotateLeft - Ultralight, Desfire, works on byte level
+// 00-01-02  >> 01-02-00
 void rol(uint8_t *data, const size_t len){
     uint8_t first = data[0];
     for (size_t i = 0; i < len-1; i++) {