AuthData.uid = 0;
AuthData.nt = 0;
AuthData.first_auth = true;
+ AuthData.ks2 = 0;
+ AuthData.ks3 = 0;
}
/**
{
case ISO14443A_CMD_WUPA:
snprintf(exp,size,"WUPA");
- MifareAuthState = masNone;
break;
case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
// 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
}
case ISO14443A_CMD_REQA:
snprintf(exp,size,"REQA");
- MifareAuthState = masNone;
break;
case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
}
void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
+ if (!isResponse && cmdsize == 1) {
+ switch(cmd[0]) {
+ case ISO14443A_CMD_WUPA:
+ case ISO14443A_CMD_REQA:
+ MifareAuthState = masNone;
+ break;
+ default:
+ break;
+ }
+ }
+
// get UID
if (MifareAuthState == masNone) {
if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
}
-bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
+bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
static struct Crypto1State *traceCrypto1;
static uint64_t mfLastKey;
if (MifareAuthState == masFirstData) {
if (AuthData.first_auth) {
- uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
- uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
- struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
+ AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
+ AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
+ struct Crypto1State *revstate = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
lfsr_rollback_word(revstate, 0, 0);
lfsr_rollback_word(revstate, 0, 0);
lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
crypto1_destroy(revstate);
mfLastKey = lfsr;
PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |",
- (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
+ (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32),
+ (unsigned int)(lfsr & 0xFFFFFFFF),
validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
- ks2,
- ks3);
+ AuthData.ks2,
+ AuthData.ks3);
AuthData.first_auth = false;
- traceCrypto1 = lfsr_recovery64(ks2, ks3);
+ traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
} else {
- printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
-
// check last used key
if (mfLastKey) {
- if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
+ if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize, parity)) {
+ PrintAndLog(" | * | key | last used key:%x%x ks2:%08x ks3:%08x | |",
+ (unsigned int)((mfLastKey & 0xFFFFFFFF00000000) >> 32),
+ (unsigned int)(mfLastKey & 0xFFFFFFFF),
+ AuthData.ks2,
+ AuthData.ks3);
+
+ traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
};
}
// check default keys
- for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
- if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
-
- break;
- };
+ if (!traceCrypto1) {
+ for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
+ if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize, parity)) {
+ PrintAndLog(" | * | key | default key:%x%x ks2:%08x ks3:%08x | |",
+ (unsigned int)((MifareDefaultKeys[defaultKeyCounter] & 0xFFFFFFFF00000000) >> 32),
+ (unsigned int)(MifareDefaultKeys[defaultKeyCounter] & 0xFFFFFFFF),
+ AuthData.ks2,
+ AuthData.ks3);
+
+ traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
+ break;
+ };
+ }
}
// nested
- if (validate_prng_nonce(AuthData.nt)) {
+ if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
+printf("nested. uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
+ uint32_t ntx = prng_successor(AuthData.nt, 90);
+ for (int i = 0; i < 16383; i++) {
+ ntx = prng_successor(ntx, 1);
+ if (NTParityChk(&AuthData, ntx)){
+
+ uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
+ uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
+ struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
+ memcpy(mfData, cmd, cmdsize);
+ mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
+
+ crypto1_destroy(pcs);
+ if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
+ AuthData.ks2 = ks2;
+ AuthData.ks3 = ks3;
+ traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
+ break;
+ }
+ }
+ }
+ if (traceCrypto1)
+ printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx));
+ else
+ printf("key> don't have any valid nt( \n");
}
//hardnested
+ if (!traceCrypto1) {
+ printf("hardnested not implemented. uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
+ }
}
return true;
}
-bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
+bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity) {
uint8_t buf[32] = {0};
struct Crypto1State *pcs;
+ AuthData.ks2 = 0;
+ AuthData.ks3 = 0;
+
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;
+
+ crypto1_word(pcs, ad->nr_enc, 1);
+// uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc; // if needs deciphered nr
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");
+ if (!(ar == ar1 && at == at1 && NTParityChk(ad, nt1)))
return false;
- }
memcpy(buf, cmd, cmdsize);
mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
- return CheckCrc14443(CRC_14443_A, buf, cmdsize);
-}
\ No newline at end of file
+ crypto1_destroy(pcs);
+
+ if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity))
+ return false;
+
+ if(!CheckCrc14443(CRC_14443_A, buf, cmdsize))
+ return false;
+
+ AuthData.ks2 = AuthData.ar_enc ^ ar;
+ AuthData.ks3 = AuthData.at_enc ^ at;
+
+ return true;
+}
+
+bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc) {
+ uint8_t parity[16];
+ oddparitybuf(cmd, cmdsize, parity);
+ printf("parity check. size=%d\n", cmdsize);
+ printf("cmd =%s\n", sprint_hex(cmd, cmdsize));
+ printf("cmd_enc=%s\n", sprint_hex(cmd_enc, cmdsize));
+ printf("parity =%s\n", printBitsPar(parity, cmdsize));
+ printf("parity_enc=%s\n", printBitsPar(parity_enc, cmdsize));
+// (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
+// (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
+ for (int i = 0; i < cmdsize - 1; i++) {
+ bool b = oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (7 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01);
+ if (b)
+ printf("!!! i=%d \n", i);
+ }
+
+ return true;
+}
projects / proxmark3-svn / blobdiff