FIX: @pwpiwi 's fixes for darkside / nested attack about the NACK/PRNG bugs.

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 0418dd98f9f6c4c35f7cc50962766e092011c6e2..797a93927e16ae57a6598ee905840bcfc3962ca8 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -108,32 +108,39 @@ void print_hex(const uint8_t * data, const size_t len)
        printf("\n");
 }
 
        printf("\n");
 }
 

-char * sprint_hex(const uint8_t * data, const size_t len) {
+char *sprint_hex(const uint8_t *data, const size_t len) {

        
        int maxLen = ( len > 1024/3) ? 1024/3 : len;
        static char buf[1024];
        
        int maxLen = ( len > 1024/3) ? 1024/3 : len;
        static char buf[1024];

+       memset(buf, 0x00, 1024);

        char * tmp = buf;
        size_t i;
 
        for (i=0; i < maxLen; ++i, tmp += 3)
        char * tmp = buf;
        size_t i;
 
        for (i=0; i < maxLen; ++i, tmp += 3)

-               sprintf(tmp, "%02x ", data[i]);
+               sprintf(tmp, "%02X ", data[i]);

 
        return buf;
 }
 
 
        return buf;
 }
 

-char * sprint_bin(const uint8_t * data, const size_t len) {
+char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {

        
        

-       int maxLen = ( len > 1024) ? 1024 : len;
+       int maxLen = ( len > 1020) ? 1020 : len;

        static char buf[1024];
        static char buf[1024];

-       char * tmp = buf;
-       size_t i;
+       memset(buf, 0x00, 1024);
+       char *tmp = buf;

 
 

-       for (i=0; i < maxLen; ++i, ++tmp)
-               sprintf(tmp, "%u", data[i]);
+       for (size_t i=0; i < maxLen; ++i){
+               sprintf(tmp++, "%u", data[i]);
+               if (breaks > 0 && !((i+1) % breaks))
+                       sprintf(tmp++, "%s","\n");
+       }

 
        return buf;
 }
 
 
        return buf;
 }
 

+char *sprint_bin(const uint8_t *data, const size_t len) {
+       return sprint_bin_break(data, len, 0);
+}

 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 {
        while (len--) {
 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 {
        while (len--) {


@@ -153,6 +160,22 @@ uint64_t bytes_to_num(uint8_t* src, size_t len)
        return num;
 }
 
        return num;
 }
 

+// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
+// to
+// 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];
+       memset(buf, 0x00, 64);
+       uint8_t *tmp = buf;
+       for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
+               for (size_t i = 0; i < blockSize; i++){
+                       tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
+               }
+       }
+       return tmp;
+}
+

 //assumes little endian
 char * printBits(size_t const size, void const * const ptr)
 {
 //assumes little endian
 char * printBits(size_t const size, void const * const ptr)
 {


@@ -213,6 +236,7 @@ int param_getptr(const char *line, int *bg, int *en, int paramnum)
        return 0;
 }
 
        return 0;
 }
 

+

 char param_getchar(const char *line, int paramnum)
 {
        int bg, en;
 char param_getchar(const char *line, int paramnum)
 {
        int bg, en;


@@ -224,7 +248,36 @@ char param_getchar(const char *line, int paramnum)
 
 uint8_t param_get8(const char *line, int paramnum)
 {
 
 uint8_t param_get8(const char *line, int paramnum)
 {

-       return param_get8ex(line, paramnum, 10, 0);
+       return param_get8ex(line, paramnum, 0, 10);
+}
+
+/**
+ * @brief Reads a decimal integer (actually, 0-254, not 255)
+ * @param line
+ * @param paramnum
+ * @return -1 if error
+ */
+uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
+{
+       uint8_t val =  param_get8ex(line, paramnum, 255, 10);
+       if( (int8_t) val == -1) return 1;
+       (*destination) = val;
+       return 0;
+}
+/**
+ * @brief Checks if param is decimal
+ * @param line
+ * @param paramnum
+ * @return
+ */
+uint8_t param_isdec(const char *line, int paramnum)
+{
+       int bg, en;
+       //TODO, check more thorougly
+       if (!param_getptr(line, &bg, &en, paramnum)) return 1;
+               //              return strtoul(&line[bg], NULL, 10) & 0xff;
+
+       return 0;

 }
 
 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
 }
 
 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)


@@ -372,7 +425,7 @@ void binarraytobinstring(char *target, char *source,  int length)
 }
 
 // return parity bit required to match type
 }
 
 // return parity bit required to match type

-uint8_t parity( char *bits, uint8_t type, int length)
+uint8_t GetParity( char *bits, uint8_t type, int length)

 {
     int x;
 
 {
     int x;
 


@@ -386,8 +439,32 @@ uint8_t parity( char *bits, uint8_t type, int length)
 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 void wiegand_add_parity(char *target, char *source, char length)
 {
 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
 void wiegand_add_parity(char *target, char *source, char length)
 {

-    *(target++)= parity(source, EVEN, length / 2);
+    *(target++)= GetParity(source, EVEN, length / 2);

     memcpy(target, source, length);
     target += length;
     memcpy(target, source, length);
     target += length;

-    *(target)= parity(source + length / 2, ODD, length / 2);
+    *(target)= GetParity(source + length / 2, ODD, length / 2);
+}
+
+void xor(unsigned char * dst, unsigned char * src, size_t len) {
+   for( ; len > 0; len--,dst++,src++)
+       *dst ^= *src;
+}
+
+int32_t le24toh (uint8_t data[3]) {
+    return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
+       
+       int i = start;
+       int j = len-1;
+
+       if (len > 32) return 0;
+
+       uint32_t tmp = 0;
+       for (; j >= 0; --j, ++i)
+               tmp     |= bits[i] << j;
+
+       return tmp;

 }
 }