mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-12-29 11:52:59 +08:00
eababdd3ef
* master: chg: 'hf mf sim' - textual fix: warning on mingw64. This offset is calculated, casting it to u32 should be fine. fix: https://github.com/RfidResearchGroup/proxmark3/issues/174 remove all offending code, return 1. Will only impact the speed of hardnested execution. fix again OSX fix https://github.com/RfidResearchGroup/proxmark3/issues/173 used predefined constants, common types moved to common header files backward compatibility, on load converter for old mfu dump format loops for counters output UL/NTAG new dump file format. Added counters support, simulation
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
//-----------------------------------------------------------------------------
|
|
// 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 "commonutil.h"
|
|
|
|
/*
|
|
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;
|
|
}
|
|
|
|
uint8_t reflect8(uint8_t b) {
|
|
return ((b * 0x80200802ULL) & 0x0884422110ULL) * 0x0101010101ULL >> 32;
|
|
}
|
|
uint16_t reflect16(uint16_t b) {
|
|
uint16_t v = 0;
|
|
v |= (b & 0x8000) >> 15;
|
|
v |= (b & 0x4000) >> 13;
|
|
v |= (b & 0x2000) >> 11;
|
|
v |= (b & 0x1000) >> 9;
|
|
v |= (b & 0x0800) >> 7;
|
|
v |= (b & 0x0400) >> 5;
|
|
v |= (b & 0x0200) >> 3;
|
|
v |= (b & 0x0100) >> 1;
|
|
|
|
v |= (b & 0x0080) << 1;
|
|
v |= (b & 0x0040) << 3;
|
|
v |= (b & 0x0020) << 5;
|
|
v |= (b & 0x0010) << 7;
|
|
v |= (b & 0x0008) << 9;
|
|
v |= (b & 0x0004) << 11;
|
|
v |= (b & 0x0002) << 13;
|
|
v |= (b & 0x0001) << 15;
|
|
return v;
|
|
}
|
|
|
|
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 num = 0;
|
|
while (len--) {
|
|
num = (num << 8) | (*src);
|
|
src++;
|
|
}
|
|
return num;
|
|
}
|
|
|
|
// 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];
|
|
}
|
|
|
|
void htole24(uint32_t val, uint8_t data[3]) {
|
|
data[0] = (uint8_t) val;
|
|
data[1] = (uint8_t)(val >> 8);
|
|
data[2] = (uint8_t)(val >> 16);
|
|
}
|
|
|