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CHG: had to move the SwapBits method.

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This commit is contained in:
iceman1001
2016-02-12 16:19:18 +01:00
parent 6b6815bccb
commit 6bb7609cad
4 changed files with 13 additions and 13 deletions
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10
client/util.c
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@@ -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;
}

3
client/util.h
View File

@@ -78,4 +78,5 @@ void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length);
void xor(unsigned char * dst, unsigned char * src, size_t len);
int32_t le24toh (uint8_t data[3]);
uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits);
void rol(uint8_t *data, const size_t len);
void rol(uint8_t *data, const size_t len);
uint32_t SwapBits(uint32_t value, int nrbits);