Update README.md

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index ae8e4fecdf526af18fa46d088d7fbfd35fdb78b0..99a26a40ac20160a688139d9a86f59b37a5f4c09 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -9,6 +9,7 @@
 //-----------------------------------------------------------------------------
 
 #include "util.h"
+#include "proxmark3.h"
 #define MAX_BIN_BREAK_LENGTH   (3072+384+1)
 
 #ifndef _WIN32
@@ -47,7 +48,7 @@ int ukbhit(void) {
 
 // log files functions
 void AddLogLine(char *file, char *extData, char *c) {
-       FILE *fLog = NULL;
+       FILE *f = NULL;
     char filename[FILE_PATH_SIZE] = {0x00};
     int len = 0;
 
@@ -55,15 +56,16 @@ void AddLogLine(char *file, char *extData, char *c) {
     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
     memcpy(filename, file, len);
    
-       fLog = fopen(filename, "a");
-       if (!fLog) {
+       f = fopen(filename, "a");
+       if (!f) {
                printf("Could not append log file %s", filename);
                return;
        }
 
-       fprintf(fLog, "%s", extData);
-       fprintf(fLog, "%s\n", c);
-       fclose(fLog);
+       fprintf(f, "%s", extData);
+       fprintf(f, "%s\n", c);
+       fflush(f);
+       fclose(f);
 }
 
 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
@@ -71,28 +73,33 @@ void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t
 }
 
 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
-  char buf[100] = {0};
-       sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
+       char buf[20] = {0};
+       memset(buf, 0x00, sizeof(buf));
+       //sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
+       sprintf(buf, "%012"llx"", data);
        AddLogLine(fileName, extData, buf);
 }
 
 void AddLogCurrentDT(char *fileName) {
-       char buff[20];
+       char buf[20];
+       memset(buf, 0x00, sizeof(buf));
        struct tm *curTime;
-
        time_t now = time(0);
        curTime = gmtime(&now);
-
-       strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
-       AddLogLine(fileName, "\nanticollision: ", buff);
+       strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
+       AddLogLine(fileName, "\nanticollision: ", buf);
 }
 
-void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
+void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
+       if ( fileName == NULL || uid == NULL || ext == NULL ){
+               printf("error: parameter is NULL\n");
+               return;
+       }
        char * fnameptr = fileName;
-       memset(fileName, 0x00, 200);
+       memset(fileName, 0x00, FILE_PATH_SIZE);
        
        for (int j = 0; j < byteCount; j++, fnameptr += 2)
-               sprintf(fnameptr, "%02x", uid[j]); 
+               sprintf(fnameptr, "%02X", uid[j]); 
        sprintf(fnameptr, "%s", ext); 
 }
 
@@ -103,6 +110,7 @@ void print_hex(const uint8_t * data, const size_t len) {
                printf("%02x ", data[i]);
        printf("\n");
 }
+
 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
 
        int rownum = 0;
@@ -130,7 +138,6 @@ char *sprint_hex(const uint8_t *data, const size_t len) {
 
        for (i=0; i < maxLen; ++i, tmp += 3)
                sprintf(tmp, "%02X ", data[i]);
-
        return buf;
 }
 
@@ -178,6 +185,7 @@ char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
        sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);       
        return buf;
 }
+
 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 {
        while (len--) {
@@ -197,12 +205,21 @@ uint64_t bytes_to_num(uint8_t* src, size_t len)
        return num;
 }
 
-void num_to_bytebits(uint64_t  n, size_t len, uint8_t *dest) {
+// takes a number (uint64_t) and creates a binarray in dest.
+void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
        while (len--) {
                dest[len] = n & 1;
                n >>= 1;
        }
 }
+//least significant bit first
+void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
+       for(int i = 0 ; i < len ; ++i) {
+               dest[i] =  n & 1;
+               n >>= 1;
+       }
+}
+
 
 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 // to
@@ -220,6 +237,8 @@ uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockS
        return tmp;
 }
 
+// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64), 
+// returns: the dest array contains the reordered src array.
 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++){
@@ -228,7 +247,6 @@ void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSiz
        }
 }
 
-
 //  -------------------------------------------------------------------------
 //  string parameters lib
 //  -------------------------------------------------------------------------
@@ -493,6 +511,7 @@ void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
     *(target)= GetParity(source + length / 2, ODD, length / 2);
 }
 
+// xor two arrays together for len items.  The dst array contains the new xored values.
 void xor(unsigned char * dst, unsigned char * src, size_t len) {
    for( ; len > 0; len--,dst++,src++)
        *dst ^= *src;
@@ -501,7 +520,10 @@ void xor(unsigned char * dst, unsigned char * src, size_t len) {
 int32_t le24toh (uint8_t data[3]) {
     return (data[2] << 16) | (data[1] << 8) | data[0];
 }
-
+uint32_t le32toh (uint8_t *data) {
+       return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
+}
+// Pack a bitarray into a uint32_t.  
 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
 
        if (len > 32) return 0;
@@ -526,6 +548,7 @@ void rol(uint8_t *data, const size_t len){
     data[len-1] = first;
 }
 
+// Swap bit order on a uint32_t value.  Can be limited by nrbits just use say 8bits reversal
 uint32_t SwapBits(uint32_t value, int nrbits) {
        uint32_t newvalue = 0;
        for(int i = 0; i < nrbits; i++) {