From 383a1fb368098ae75b0409285532b21587679416 Mon Sep 17 00:00:00 2001 From: Gabriele Gristina Date: Wed, 19 Oct 2016 00:13:53 +0200 Subject: [PATCH] Speedup Mifare Plus Attack v2 --- client/cmdhfmfhard.c | 104 ++++++++++++++++++++++++++++++++----------- 1 file changed, 79 insertions(+), 25 deletions(-) diff --git a/client/cmdhfmfhard.c b/client/cmdhfmfhard.c index e9a2e696..956da8e8 100644 --- a/client/cmdhfmfhard.c +++ b/client/cmdhfmfhard.c @@ -93,6 +93,13 @@ typedef struct noncelist { float score1, score2; } noncelist_t; +typedef struct check_args { + uint32_t next_fivehundred; + uint32_t total_num_nonces; + uint32_t total_added_nonces; + uint32_t idx; +} check_args_t; + static size_t nonces_to_bruteforce = 0; static noncelistentry_t *brute_force_nonces[256]; static uint32_t cuid = 0; @@ -132,6 +139,15 @@ static partial_indexed_statelist_t partial_statelist[17]; static partial_indexed_statelist_t statelist_bitflip; static statelist_t *candidates = NULL; +bool thread_check_started = false; +bool thread_check_done = false; +bool cracking = false; +bool field_off = false; + +pthread_t thread_check; +check_args_t cargs; + +static void* check_thread(void*); static bool generate_candidates(uint16_t, uint16_t); static bool brute_force(void); @@ -759,7 +775,6 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ { clock_t time1 = clock(); bool initialize = true; - bool field_off = false; bool finished = false; bool filter_flip_checked = false; uint32_t flags = 0; @@ -771,11 +786,19 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ FILE *fnonces = NULL; UsbCommand resp; + field_off = false; + cracking = false; + printf("Acquiring nonces...\n"); - + clearCommandBuffer(); do { + if (cracking) { + sleep(3); + continue; + } + flags = 0; flags |= initialize ? 0x0001 : 0; flags |= slow ? 0x0002 : 0; @@ -831,12 +854,13 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ total_num_nonces += num_acquired_nonces; } - if (first_byte_num == 256 ) { + if (first_byte_num == 256 && !field_off) { // printf("first_byte_num = %d, first_byte_Sum = %d\n", first_byte_num, first_byte_Sum); if (!filter_flip_checked) { Check_for_FilterFlipProperties(); filter_flip_checked = true; } + num_good_first_bytes = estimate_second_byte_sum(); if (total_num_nonces > next_fivehundred) { next_fivehundred = (total_num_nonces/500+1) * 500; @@ -845,22 +869,27 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ total_added_nonces, CONFIDENCE_THRESHOLD * 100.0, num_good_first_bytes); + } - if (total_added_nonces > (2500*idx)) { - clock_t time1 = clock(); - field_off = generate_candidates(first_byte_Sum, nonces[best_first_bytes[0]].Sum8_guess); - time1 = clock() - time1; - if ( time1 > 0 ) PrintAndLog("Time for generating key candidates list: %1.0f seconds", ((float)time1)/CLOCKS_PER_SEC); - if (known_target_key != -1) brute_force(); - idx++; + if (thread_check_started) { + if (thread_check_done) { + //printf ("Detect check thread end ..\n"); + pthread_join (thread_check, 0); + idx = cargs.idx; + thread_check_started = thread_check_done = false; } - } - if (num_good_first_bytes >= GOOD_BYTES_REQUIRED) { - field_off = true; // switch off field with next SendCommand and then finish - } + } else { + //printf ("Starting check thread ...\n"); + memset (&cargs, 0, sizeof (cargs)); - if (field_off) { - field_off = finished = brute_force(); + // set arguments + cargs.next_fivehundred = next_fivehundred; + cargs.total_num_nonces = total_num_nonces; + cargs.total_added_nonces = total_added_nonces; + cargs.idx = idx; + + pthread_create (&thread_check, NULL, check_thread, (void *)&cargs); + thread_check_started = true; } } @@ -869,6 +898,7 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ fclose(fnonces); return 1; } + if (resp.arg[0]) { fclose(fnonces); return resp.arg[0]; // error during nested_hard @@ -879,7 +909,6 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_ } while (!finished); - if (nonce_file_write) { fclose(fnonces); } @@ -1301,6 +1330,8 @@ static bool generate_candidates(uint16_t sum_a0, uint16_t sum_a8) } } + if (maximum_states == 0) return false; + printf("Number of possible keys with Sum(a0) = %d: %"PRIu64" (2^%1.1f)\n", sum_a0, maximum_states, log(maximum_states)/log(2.0)); init_statelist_cache(); @@ -1497,7 +1528,7 @@ static const uint64_t crack_states_bitsliced(statelist_t *p){ const bitslice_value_t odd_feedback = odd_feedback_bit ? bs_ones.value : bs_zeroes.value; for(size_t block_idx = 0; block_idx < bitsliced_blocks; ++block_idx){ - bitslice_t const * restrict bitsliced_even_state = bitsliced_even_states[block_idx]; + const bitslice_t * const restrict bitsliced_even_state = bitsliced_even_states[block_idx]; size_t state_idx; // set even bits for(state_idx = 0; state_idx < STATE_SIZE-ROLLBACK_SIZE; state_idx+=2){ @@ -1630,6 +1661,33 @@ out: return key; } +static void* check_thread(void* x) +{ + check_args_t *cargs = (check_args_t *)x; + + // printf("first_byte_num = %d, first_byte_Sum = %d\n", first_byte_num, first_byte_Sum); + num_good_first_bytes = estimate_second_byte_sum(); + if (cargs->total_added_nonces > (2500*cargs->idx)) { + clock_t time1 = clock(); + cracking = generate_candidates(first_byte_Sum, nonces[best_first_bytes[0]].Sum8_guess); + time1 = clock() - time1; + if ( time1 > 0 ) PrintAndLog("Time for generating key candidates list: %1.0f seconds", ((float)time1)/CLOCKS_PER_SEC); + if (known_target_key != -1) brute_force(); + cargs->idx++; + } + + if (cracking || num_good_first_bytes >= GOOD_BYTES_REQUIRED) { + if (cargs->total_added_nonces > 2500+1000) { + field_off = brute_force(); // switch off field with next SendCommand and then finish + } + cracking = false; + } + + thread_check_done = true; + + return (void *) NULL; +} + static void* crack_states_thread(void* x){ const size_t thread_id = (size_t)x; size_t current_bucket = thread_id; @@ -1660,6 +1718,8 @@ static bool brute_force(void) PrintAndLog("Looking for known target key in remaining key space..."); ret = TestIfKeyExists(known_target_key); } else { + if (maximum_states == 0) return false; + PrintAndLog("Brute force phase starting."); time_t start, end; time(&start); @@ -1712,15 +1772,9 @@ static bool brute_force(void) time(&end); double elapsed_time = difftime(end, start); - if(keys_found){ + if (keys_found && TestIfKeyExists(foundkey)) { PrintAndLog("Success! Tested %"PRIu32" states, found %u keys after %.f seconds", total_states_tested, keys_found, elapsed_time); PrintAndLog("\nFound key: %012"PRIx64"\n", foundkey); - known_target_key = foundkey; - - ret = TestIfKeyExists(known_target_key); - - PrintAndLog("Check if key is found in the keyspace: %d", ret); - ret = true; } else { PrintAndLog("Fail! Tested %"PRIu32" states, in %.f seconds", total_states_tested, elapsed_time); -- 2.39.2