From e01bc7942cb7dc87350fd095388be58560f32f9a Mon Sep 17 00:00:00 2001 From: Oleg Moiseenko Date: Sun, 11 Feb 2018 00:40:24 +0200 Subject: [PATCH] move ks to authdata --- client/cmdhflist.c | 18 +++++++++++------- client/cmdhflist.h | 2 ++ 2 files changed, 13 insertions(+), 7 deletions(-) diff --git a/client/cmdhflist.c b/client/cmdhflist.c index 06bd8d18..1701c13a 100644 --- a/client/cmdhflist.c +++ b/client/cmdhflist.c @@ -43,6 +43,8 @@ void ClearAuthData() { AuthData.uid = 0; AuthData.nt = 0; AuthData.first_auth = true; + AuthData.ks2 = 0; + AuthData.ks3 = 0; } /** @@ -266,9 +268,9 @@ bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *m 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); @@ -281,12 +283,12 @@ bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *m 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": "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); @@ -321,7 +323,9 @@ bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *m crypto1_destroy(pcs); if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) { - traceCrypto1 = lfsr_recovery64(ks2, ks3); + AuthData.ks2 = ks2; + AuthData.ks3 = ks3; + traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3); break; } } diff --git a/client/cmdhflist.h b/client/cmdhflist.h index aa037658..76b57392 100644 --- a/client/cmdhflist.h +++ b/client/cmdhflist.h @@ -25,6 +25,8 @@ typedef struct { uint32_t at_enc; // encrypted tag response uint8_t at_enc_par; // encrypted tag response parity bool first_auth; // is first authentication + uint32_t ks2; // ar ^ ar_enc + uint32_t ks3; // at ^ at_enc } TAuthData; extern void ClearAuthData(); -- 2.39.2