//-----------------------------------------------------------------------------
-// Utility functions used in many places, not specific to any piece of code.
// Jonathan Westhues, Sept 2005
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Utility functions used in many places, not specific to any piece of code.
//-----------------------------------------------------------------------------
-#include "proxmark3.h"
#include "util.h"
-void *memcpy(void *dest, const void *src, int len)
-{
- uint8_t *d = dest;
- const uint8_t *s = src;
- while((len--) > 0) {
- *d = *s;
- d++;
- s++;
- }
- return dest;
+size_t nbytes(size_t nbits) {
+ return (nbits >> 3)+((nbits % 8) > 0);
}
-void *memset(void *dest, int c, int len)
-{
- uint8_t *d = dest;
- while((len--) > 0) {
- *d = c;
- d++;
+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 dest;
+ return newvalue;
}
-int memcmp(const void *av, const void *bv, int len)
-{
- const uint8_t *a = av;
- const uint8_t *b = bv;
-
- while((len--) > 0) {
- if(*a != *b) {
- return *a - *b;
- }
- a++;
- b++;
- }
- return 0;
-}
-
-int strlen(const char *str)
-{
- int l = 0;
- while(*str) {
- l++;
- str++;
+/*
+ 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 l;
-}
-
-char* strncat(char *dest, const char *src, unsigned int n)
-{
- unsigned int dest_len = strlen(dest);
- unsigned int i;
-
- for (i = 0 ; i < n && src[i] != '\0' ; i++)
- dest[dest_len + i] = src[i];
- dest[dest_len + i] = '\0';
-
- return dest;
+ return v;
}
-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;
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++;
}
return num;
}
-void LEDsoff()
-{
+// RotateLeft - Ultralight, Desfire
+void rol(uint8_t *data, const size_t len) {
+ uint8_t first = data[0];
+ for (size_t i = 0; i < len-1; i++) {
+ data[i] = data[i+1];
+ }
+ data[len-1] = first;
+}
+
+void lsl (uint8_t *data, size_t len) {
+ for (size_t n = 0; n < len - 1; n++) {
+ data[n] = (data[n] << 1) | (data[n+1] >> 7);
+ }
+ data[len - 1] <<= 1;
+}
+
+int32_t le24toh (uint8_t data[3]) {
+ return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+//convert hex digit to integer
+uint8_t hex2int(char hexchar){
+ switch(hexchar){
+ case '0': return 0; break;
+ case '1': return 1; break;
+ case '2': return 2; break;
+ case '3': return 3; break;
+ case '4': return 4; break;
+ case '5': return 5; break;
+ case '6': return 6; break;
+ case '7': return 7; break;
+ case '8': return 8; break;
+ case '9': return 9; break;
+ case 'a':
+ case 'A': return 10; break;
+ case 'b':
+ case 'B': return 11; break;
+ case 'c':
+ case 'C': return 12; break;
+ case 'd':
+ case 'D': return 13; break;
+ case 'e':
+ case 'E': return 14; break;
+ case 'f':
+ case 'F': return 15; break;
+ default:
+ return 0;
+ }
+}
+
+void LEDsoff() {
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
}
// LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
-void LED(int led, int ms)
-{
+void LED(int led, int ms) {
if (led & LED_RED)
LED_C_ON();
if (led & LED_ORANGE)
LED_D_OFF();
}
-
// Determine if a button is double clicked, single clicked,
// not clicked, or held down (for ms || 1sec)
// In general, don't use this function unless you expect a
// double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
-int BUTTON_CLICKED(int ms)
-{
+int BUTTON_CLICKED(int ms) {
// Up to 500ms in between clicks to mean a double click
int ticks = (48000 * (ms ? ms : 1000)) >> 10;
}
// Determine if a button is held down
-int BUTTON_HELD(int ms)
-{
+int BUTTON_HELD(int ms) {
// If button is held for one second
int ticks = (48000 * (ms ? ms : 1000)) >> 10;
return BUTTON_ERROR;
}
-// attempt at high resolution microsecond timer
-// beware: timer counts in 21.3uS increments (1024/48Mhz)
-void SpinDelayUs(int us)
-{
- int ticks = (48*us) >> 10;
-
- // Borrow a PWM unit for my real-time clock
- AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
- // 48 MHz / 1024 gives 46.875 kHz
- AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
- AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
- AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
-
- uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
-
- for(;;) {
- uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
- if (now == (uint16_t)(start + ticks))
- return;
-
- WDT_HIT();
- }
-}
-
-void SpinDelay(int ms)
-{
- // convert to uS and call microsecond delay function
- SpinDelayUs(ms*1000);
-}
-
/* Similar to FpgaGatherVersion this formats stored version information
* into a string representation. It takes a pointer to the struct version_information,
* verifies the magic properties, then stores a formatted string, prefixed by
* prefix in dst.
*/
-void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
-{
+void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information) {
struct version_information *v = (struct version_information*)version_information;
dst[0] = 0;
- strncat(dst, prefix, len);
+ strncat(dst, prefix, len-1);
if(v->magic != VERSION_INFORMATION_MAGIC) {
- strncat(dst, "Missing/Invalid version information", len);
+ strncat(dst, "Missing/Invalid version information\n", len - strlen(dst) - 1);
return;
}
if(v->versionversion != 1) {
- strncat(dst, "Version information not understood", len);
+ strncat(dst, "Version information not understood\n", len - strlen(dst) - 1);
return;
}
if(!v->present) {
- strncat(dst, "Version information not available", len);
+ strncat(dst, "Version information not available\n", len - strlen(dst) - 1);
return;
}
- strncat(dst, v->svnversion, len);
+ strncat(dst, v->gitversion, len - strlen(dst) - 1);
if(v->clean == 0) {
- strncat(dst, "-unclean", len);
+ strncat(dst, "-unclean", len - strlen(dst) - 1);
} else if(v->clean == 2) {
- strncat(dst, "-suspect", len);
+ strncat(dst, "-suspect", len - strlen(dst) - 1);
}
- strncat(dst, " ", len);
- strncat(dst, v->buildtime, len);
+ strncat(dst, " ", len - strlen(dst) - 1);
+ strncat(dst, v->buildtime, len - strlen(dst) - 1);
+ strncat(dst, "\n", len - strlen(dst) - 1);
}
projects / proxmark3-svn / blobdiff