github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-20 13:23:51 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

CHG: had to move the SwapBits method.

Browse source
This commit is contained in:
iceman1001 2016-02-12 16:19:18 +01:00
commit 6bb7609cad
4 changed files with 13 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

10
client/util.c
View file

@ -503,10 +503,18 @@ uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
// RotateLeft - Ultralight, Desfire, works on byte level
// 00-01-02 >> 01-02-00
void rol(uint8_t *data, const size_t len){
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;
}
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;
}