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mock of key checking

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This commit is contained in:
Oleg Moiseenko 2018-02-10 23:25:28 +02:00
parent c6a886fb4f
commit dca8220f72
1 changed files with 53 additions and 2 deletions
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55
client/cmdhflist.c
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@ -248,7 +248,7 @@ void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8
bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
static struct Crypto1State *traceCrypto1;
uint64_t mfLastKey;
static uint64_t mfLastKey;
*mfDataLen = 0;
@ -325,6 +325,57 @@ bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *m
return *mfDataLen > 0;
}
bool NTParityChk(TAuthData *ad, uint32_t ntx) {
if (
(oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
(oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
(oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
)
return false;
uint32_t ar = prng_successor(ntx, 64);
if (
(oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
(oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
(oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
)
return false;
uint32_t at = prng_successor(ntx, 96);
if (
(oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
(oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
(oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
(oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
)
return false;
return true;
}
bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
return false;
uint8_t buf[32] = {0};
struct Crypto1State *pcs;
pcs = crypto1_create(key);
uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
uint32_t ar = prng_successor(nt1, 64);
uint32_t at = prng_successor(nt1, 96);
printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", ad->uid, nt1, printBitsPar(&ad->nt_enc_par, 4), ar, at);
uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);
if (NTParityChk(ad, nt1))
printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
else {
printf("key> the same key test. check nt parity error.\n");
return false;
}
memcpy(buf, cmd, cmdsize);
mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
return CheckCrc14443(CRC_14443_A, buf, cmdsize);
}