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Calculates response to PICC challenge

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This commit is contained in:
Blaine Forbort 2014-12-19 19:36:19 -08:00
parent b6f41bfdfe
commit 0127902ee6
1 changed files with 24 additions and 1 deletions
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25
armsrc/mifaredesfire.c
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@ -239,7 +239,30 @@ void MifareDES_Auth1(uint8_t mode, uint8_t algo, uint8_t keyno, uint8_t *datain
memcpy( encRndB, resp+3, 8);
des_dec(&decRndB, &encRndB, &keybytes);
Dbprintf("RandB: %02x%02x%02x%02x%02x%02x%02x%02x",decRndB[0],decRndB[1],decRndB[2],decRndB[3],decRndB[4],decRndB[5],decRndB[6],decRndB[7]);
Dbprintf("RndB: %02x%02x%02x%02x%02x%02x%02x%02x",decRndB[0],decRndB[1],decRndB[2],decRndB[3],decRndB[4],decRndB[5],decRndB[6],decRndB[7]);
rol(decRndB,8);
Dbprintf("RndB': %02x%02x%02x%02x%02x%02x%02x%02x",decRndB[0],decRndB[1],decRndB[2],decRndB[3],decRndB[4],decRndB[5],decRndB[6],decRndB[7]);
uint8_t decRndA[8] = {0x00};
uint8_t encRndA[8] = {0x00};
des_dec(&encRndA, &decRndA, &keybytes);
Dbprintf("RndA: %02x%02x%02x%02x%02x%02x%02x%02x",decRndA[0],decRndA[1],decRndA[2],decRndA[3],decRndA[4],decRndA[5],decRndA[6],decRndA[7]);
Dbprintf("ek0RandA: %02x%02x%02x%02x%02x%02x%02x%02x",encRndA[0],encRndA[1],encRndA[2],encRndA[3],encRndA[4],encRndA[5],encRndA[6],encRndA[7]);
memcpy(both, encRndA, 8);
for (int x = 0; x < 8; x++) {
decRndB[x] = decRndB[x] ^ encRndA[x];
}
des_dec(&encRndB, &decRndB, &keybytes);
memcpy(both + 8, encRndB, 8);
Dbprintf("both: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",both[0],both[1],both[2],both[3],both[4],both[5],both[6],both[7],both[8],both[9],both[10],both[11],both[12],both[13],both[14],both[15]);
// TODO: Send response
}
break;