X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c805748f340391011d647f7f524d1744563ddec1..e108a48ac415ab2b1fc212c63ad1a2e68efd5e4e:/client/util.c

diff --git a/client/util.c b/client/util.c
index 99a26a40..0d24ac8e 100644
--- a/client/util.c
+++ b/client/util.c
@@ -9,15 +9,10 @@
 //-----------------------------------------------------------------------------
 
 #include "util.h"
-#include "proxmark3.h"
 #define MAX_BIN_BREAK_LENGTH   (3072+384+1)
 
 #ifndef _WIN32
-#include <termios.h>
-#include <sys/ioctl.h> 
-
-int ukbhit(void)
-{
+int ukbhit(void) {
   int cnt = 0;
   int error;
   static struct termios Otty, Ntty;
@@ -40,7 +35,6 @@ int ukbhit(void)
 }
 
 #else
-#include <conio.h>
 int ukbhit(void) {
 	return kbhit();
 }
@@ -65,7 +59,10 @@ void AddLogLine(char *file, char *extData, char *c) {
 	fprintf(f, "%s", extData);
 	fprintf(f, "%s\n", c);
 	fflush(f);
-	fclose(f);
+	if (f) {
+		fclose(f);
+		f = NULL;
+	}
 }
 
 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
@@ -186,19 +183,16 @@ char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
 	return buf;
 }
 
-void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
-{
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
 	while (len--) {
-		dest[len] = (uint8_t) n;
+		dest[len] = n & 0xFF;
 		n >>= 8;
 	}
 }
 
-uint64_t bytes_to_num(uint8_t* src, size_t len)
-{
+uint64_t bytes_to_num(uint8_t* src, size_t len) {
 	uint64_t num = 0;
-	while (len--)
-	{
+	while (len--) {
 		num = (num << 8) | (*src);
 		src++;
 	}
@@ -212,6 +206,7 @@ void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
 		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) {
@@ -220,13 +215,12 @@ void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
 	}
 }
 
-
 // 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){
-	uint8_t buf[64];
+	static uint8_t buf[64];
 	memset(buf, 0x00, 64);
 	uint8_t *tmp = buf;
 	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
@@ -234,7 +228,7 @@ uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockS
 			tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
 		}
 	}
-	return tmp;
+	return buf;
 }
 
 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64), 
@@ -285,7 +279,6 @@ int param_getptr(const char *line, int *bg, int *en, int paramnum)
 	return 0;
 }
 
-
 char param_getchar(const char *line, int paramnum)
 {
 	int bg, en;
@@ -357,8 +350,6 @@ uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
 		return strtoull(&line[bg], NULL, base);
 	else
 		return deflt;
-
-	return 0;
 }
 
 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
@@ -549,10 +540,36 @@ void rol(uint8_t *data, const size_t len){
 }
 
 // Swap bit order on a uint32_t value.  Can be limited by nrbits just use say 8bits reversal
+// And clears the rest of the bits.
 uint32_t SwapBits(uint32_t value, int nrbits) {
 	uint32_t newvalue = 0;
 	for(int i = 0; i < nrbits; i++) {
 		newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
 	}
 	return newvalue;
+}
+/*
+ ref  http://www.csm.ornl.gov/~dunigan/crc.html
+ Returns the value v with the bottom b [0,32] bits reflected. 
+ Example: reflect(0x3e23L,3) == 0x3e26
+*/
+uint32_t reflect(uint32_t v, int b) {
+	uint32_t t = v;
+	for ( int i = 0; i < b; ++i) {
+		if (t & 1)
+			v |=  BITMASK((b-1)-i);
+		else
+			v &= ~BITMASK((b-1)-i);
+		t>>=1;
+	}
+	return v;
+}
+
+uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor) {
+   uint64_t remainder=0, quotient=0, result=0;
+   remainder = num % divider;
+   quotient = num / divider;
+   if(!(quotient == 0 && remainder == 0))
+   result += HornerScheme(quotient, divider, factor) * factor + remainder;
+   return result;
 }
\ No newline at end of file