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CHG: Syntax suger

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EXperimented:  unfolded a loop.
This commit is contained in:
iceman1001 2016-01-25 20:24:23 +01:00
parent 05e07571a4
commit bd9dfaa891
1 changed files with 13 additions and 17 deletions
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30
armsrc/mifareutil.c
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@ -149,8 +149,8 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
uint32_t nt, ntpp; // Supplied tag nonce
uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
// Transmit MIFARE_CLASSIC_AUTH
len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing);
@ -185,8 +185,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
// Generate (encrypted) nr+parity by loading it into the cipher (Nr)
par[0] = 0;
for (pos = 0; pos < 4; pos++)
{
for (pos = 0; pos < 4; pos++) {
mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos];
par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos));
}
@ -195,8 +194,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
nt = prng_successor(nt,32);
// ar+parity
for (pos = 4; pos < 8; pos++)
{
for (pos = 4; pos < 8; pos++) {
nt = prng_successor(nt,8);
mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
par[0] |= (((filter(pcs->odd) ^ oddparity8(nt & 0xff)) & 0x01) << (7-pos));
@ -207,8 +205,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
// Receive 4 byte tag answer
len = ReaderReceive(receivedAnswer, receivedAnswerPar);
if (!len)
{
if (!len) {
if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout.");
return 2;
}
@ -220,7 +217,6 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response.");
return 3;
}
return 0;
}
@ -370,7 +366,7 @@ int mifare_ultra_auth(uint8_t *keybytes){
int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
{
uint16_t len;
uint8_t bt[2];
uint8_t bt[2] = {0x00};
uint8_t receivedAnswer[MAX_FRAME_SIZE] = {0x00};
uint8_t receivedAnswerPar[MAX_PARITY_SIZE] = {0x00};
@ -398,7 +394,7 @@ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
{
// variables
uint16_t len, i;
uint16_t len;
uint32_t pos = 0;
uint8_t par[3] = {0x00}; // enough for 18 Bytes to send
byte_t res = 0;
@ -419,8 +415,7 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
AppendCrc14443a(d_block, 16);
// crypto
for (pos = 0; pos < 18; pos++)
{
for (pos = 0; pos < 18; pos++) {
d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007)));
}
@ -431,8 +426,10 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
len = ReaderReceive(receivedAnswer, receivedAnswerPar);
res = 0;
for (i = 0; i < 4; i++)
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 0)) << 0;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 1)) << 1;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 2)) << 2;
res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], 3)) << 3;
if ((len != 1) || (res != 0x0A)) {
if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res);
@ -629,9 +626,8 @@ void emlClearMem(void) {
memset(emCARD, 0, CARD_MEMORY_SIZE);
// fill sectors trailer data
for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {
for(b = 3; b < 256; b<127?(b+=4):(b+=16))
emlSetMem((uint8_t *)trailer, b , 1);
}
// uid
emlSetMem((uint8_t *)uid, 0, 1);