X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7b215d149ac4fd5709635111d86a2062fc7ac3ad..7bea15816e2c9c4277df4670ab841ca5694c61d0:/client/cmdhflist.c diff --git a/client/cmdhflist.c b/client/cmdhflist.c index 0eaafa68..06bd8d18 100644 --- a/client/cmdhflist.c +++ b/client/cmdhflist.c @@ -23,6 +23,7 @@ #include "protocols.h" #include "crapto1/crapto1.h" #include "mifarehost.h" +#include "mifaredefault.h" enum MifareAuthSeq { @@ -30,9 +31,9 @@ enum MifareAuthSeq { masNt, masNrAr, masAt, + masAuthComplete, masFirstData, masData, - masDataNested, masError, }; static enum MifareAuthSeq MifareAuthState; @@ -73,9 +74,6 @@ uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len) { switch(MifareAuthState) { case masNone: - case masFirstData: - case masData: - case masDataNested: case masError: return iso14443A_CRC_check(isResponse, data, len); default: @@ -231,7 +229,7 @@ void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8 case masAt: if (cmdsize == 4 && isResponse) { snprintf(exp,size,"AUTH: at (enc)"); - MifareAuthState = masFirstData; + MifareAuthState = masAuthComplete; AuthData.at_enc = bytes_to_num(cmd, 4); AuthData.at_enc_par = parity[0]; return; @@ -243,14 +241,26 @@ void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8 break; } - if (!isResponse) + if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError))) annotateIso14443a(exp, size, cmd, cmdsize); } bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) { + static struct Crypto1State *traceCrypto1; + static uint64_t mfLastKey; + *mfDataLen = 0; + if (MifareAuthState == masAuthComplete) { + if (traceCrypto1) { + crypto1_destroy(traceCrypto1); + } + + MifareAuthState = masFirstData; + return false; + } + if (cmdsize > 32) return false; @@ -267,27 +277,133 @@ bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *m uint64_t lfsr = 0; crypto1_get_lfsr(revstate, &lfsr); crypto1_destroy(revstate); -// LastKey = lfsr; - printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc); - printf("AUTH: probable key:%x%x Prng:%s ks2:%08x ks3:%08x\n", + mfLastKey = lfsr; + PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF), - validate_prng_nonce(AuthData.nt) ? "WEAK": "HARDEND", + validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD", ks2, ks3); AuthData.first_auth = false; + + traceCrypto1 = lfsr_recovery64(ks2, 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)) { + }; + } + + // check default keys + if (!traceCrypto1) { + for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){ + if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) { + + break; + }; + } + } + + // nested + if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) { + 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)) { + traceCrypto1 = lfsr_recovery64(ks2, 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) { + } } MifareAuthState = masData; - return true; } - if (MifareAuthState == masData) { + if (MifareAuthState == masData && traceCrypto1) { + memcpy(mfData, cmd, cmdsize); + mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0); + *mfDataLen = cmdsize; } 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) { + 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); + + crypto1_destroy(pcs); + + return CheckCrc14443(CRC_14443_A, buf, cmdsize); +} \ No newline at end of file