mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-08-21 05:43:48 -07:00
Merge pull request #43 from matrix/master
Improved Mifare Plus Atack (hf mf hardnested)
This commit is contained in:
Iceman
GitHub
commit
3c528f5fda
3 changed files with 165 additions and 77 deletions
1
.gitignore
vendored
1
.gitignore
vendored
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@ -15,6 +15,7 @@
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*.moc.cpp
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*.z
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*.exe
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*.dsym
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hardnested_stats.txt
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proxmark
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proxmark3
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@ -37,7 +37,9 @@
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#include <assert.h>
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#define CONFIDENCE_THRESHOLD 0.95 // Collect nonces until we are certain enough that the following brute force is successfull
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#define GOOD_BYTES_REQUIRED 13 // default 28, could be smaller == faster
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#define GOOD_BYTES_REQUIRED 13 // default 28, could be smaller == faster
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#define MIN_NONCES_REQUIRED 4000 // 4000-5000 could be good
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#define NONCES_TRIGGER 2500 // every 2500 nonces check if we can crack the key
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#define END_OF_LIST_MARKER 0xFFFFFFFF
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@ -132,6 +134,17 @@ static partial_indexed_statelist_t partial_statelist[17];
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static partial_indexed_statelist_t statelist_bitflip;
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static statelist_t *candidates = NULL;
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bool thread_check_started = false;
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bool thread_check_done = false;
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bool cracking = false;
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bool field_off = false;
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pthread_t thread_check;
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static void* check_thread();
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static bool generate_candidates(uint16_t, uint16_t);
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static bool brute_force(void);
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static int add_nonce(uint32_t nonce_enc, uint8_t par_enc)
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{
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uint8_t first_byte = nonce_enc >> 24;
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@ -756,7 +769,6 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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{
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clock_t time1 = clock();
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bool initialize = true;
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bool field_off = false;
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bool finished = false;
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bool filter_flip_checked = false;
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uint32_t flags = 0;
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@ -764,14 +776,25 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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uint32_t total_num_nonces = 0;
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uint32_t next_fivehundred = 500;
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uint32_t total_added_nonces = 0;
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uint32_t idx = 1;
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FILE *fnonces = NULL;
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UsbCommand resp;
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field_off = false;
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cracking = false;
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thread_check_started = false;
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thread_check_done = false;
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printf("Acquiring nonces...\n");
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clearCommandBuffer();
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do {
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if (cracking) {
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sleep(3);
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continue;
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}
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flags = 0;
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flags |= initialize ? 0x0001 : 0;
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flags |= slow ? 0x0002 : 0;
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@ -817,7 +840,7 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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//printf("Encrypted nonce: %08x, encrypted_parity: %02x\n", nt_enc2, par_enc & 0x0f);
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total_added_nonces += add_nonce(nt_enc2, par_enc & 0x0f);
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if (nonce_file_write) {
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if (nonce_file_write && fnonces) {
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fwrite(bufp, 1, 9, fnonces);
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}
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@ -827,12 +850,13 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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total_num_nonces += num_acquired_nonces;
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}
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if (first_byte_num == 256 ) {
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if (first_byte_num == 256 && !field_off) {
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// printf("first_byte_num = %d, first_byte_Sum = %d\n", first_byte_num, first_byte_Sum);
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if (!filter_flip_checked) {
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Check_for_FilterFlipProperties();
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filter_flip_checked = true;
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}
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num_good_first_bytes = estimate_second_byte_sum();
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if (total_num_nonces > next_fivehundred) {
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next_fivehundred = (total_num_nonces/500+1) * 500;
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@ -842,18 +866,39 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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CONFIDENCE_THRESHOLD * 100.0,
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num_good_first_bytes);
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}
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if (num_good_first_bytes >= GOOD_BYTES_REQUIRED) {
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field_off = true; // switch off field with next SendCommand and then finish
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if (thread_check_started) {
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if (thread_check_done) {
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pthread_join (thread_check, 0);
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thread_check_started = thread_check_done = false;
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}
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} else {
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if (total_added_nonces >= MIN_NONCES_REQUIRED)
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{
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num_good_first_bytes = estimate_second_byte_sum();
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if (total_added_nonces > (NONCES_TRIGGER*idx) || num_good_first_bytes >= GOOD_BYTES_REQUIRED) {
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pthread_create (&thread_check, NULL, check_thread, NULL);
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thread_check_started = true;
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idx++;
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}
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}
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}
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}
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if (!initialize) {
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if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
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fclose(fnonces);
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if (fnonces) { // fix segfault on proxmark3 v1 when reset button is pressed
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fclose(fnonces);
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fnonces = NULL;
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}
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return 1;
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}
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if (resp.arg[0]) {
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fclose(fnonces);
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if (fnonces) { // fix segfault on proxmark3 v1 when reset button is pressed
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fclose(fnonces);
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fnonces = NULL;
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}
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return resp.arg[0]; // error during nested_hard
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}
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}
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@ -862,9 +907,9 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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} while (!finished);
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if (nonce_file_write) {
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if (nonce_file_write && fnonces) {
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fclose(fnonces);
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fnonces = NULL;
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}
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time1 = clock() - time1;
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@ -881,7 +926,8 @@ static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_
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static int init_partial_statelists(void)
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{
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const uint32_t sizes_odd[17] = { 126757, 0, 18387, 0, 74241, 0, 181737, 0, 248801, 0, 182033, 0, 73421, 0, 17607, 0, 125601 };
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const uint32_t sizes_even[17] = { 125723, 0, 17867, 0, 74305, 0, 178707, 0, 248801, 0, 185063, 0, 73356, 0, 18127, 0, 126634 };
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// const uint32_t sizes_even[17] = { 125723, 0, 17867, 0, 74305, 0, 178707, 0, 248801, 0, 185063, 0, 73356, 0, 18127, 0, 126634 };
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const uint32_t sizes_even[17] = { 125723, 0, 17867, 0, 74305, 0, 178707, 0, 248801, 0, 185063, 0, 73357, 0, 18127, 0, 126635 };
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printf("Allocating memory for partial statelists...\n");
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for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
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@ -1215,7 +1261,7 @@ static statelist_t *add_more_candidates(statelist_t *current_candidates)
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return new_candidates;
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}
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static void TestIfKeyExists(uint64_t key)
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static bool TestIfKeyExists(uint64_t key)
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{
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struct Crypto1State *pcs;
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pcs = crypto1_create(key);
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@ -1256,7 +1302,7 @@ static void TestIfKeyExists(uint64_t key)
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fprintf(fstats, "1\n");
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}
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crypto1_destroy(pcs);
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return;
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return true;
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}
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}
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@ -1265,9 +1311,11 @@ static void TestIfKeyExists(uint64_t key)
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fprintf(fstats, "0\n");
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}
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crypto1_destroy(pcs);
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return false;
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}
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static void generate_candidates(uint16_t sum_a0, uint16_t sum_a8)
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static bool generate_candidates(uint16_t sum_a0, uint16_t sum_a8)
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{
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printf("Generating crypto1 state candidates... \n");
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@ -1281,6 +1329,9 @@ static void generate_candidates(uint16_t sum_a0, uint16_t sum_a8)
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}
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}
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}
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if (maximum_states == 0) return false; // prevent keyspace reduction error (2^-inf)
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printf("Number of possible keys with Sum(a0) = %d: %"PRIu64" (2^%1.1f)\n", sum_a0, maximum_states, log(maximum_states)/log(2.0));
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init_statelist_cache();
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@ -1325,19 +1376,25 @@ static void generate_candidates(uint16_t sum_a0, uint16_t sum_a8)
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}
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}
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maximum_states = 0;
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for (statelist_t *sl = candidates; sl != NULL; sl = sl->next) {
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maximum_states += (uint64_t)sl->len[ODD_STATE] * sl->len[EVEN_STATE];
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}
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printf("Number of remaining possible keys: %"PRIu64" (2^%1.1f)\n", maximum_states, log(maximum_states)/log(2.0));
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if (maximum_states == 0) return false; // prevent keyspace reduction error (2^-inf)
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float kcalc = log(maximum_states)/log(2.0);
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printf("Number of remaining possible keys: %"PRIu64" (2^%1.1f)\n", maximum_states, kcalc);
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if (write_stats) {
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if (maximum_states != 0) {
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fprintf(fstats, "%1.1f;", log(maximum_states)/log(2.0));
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fprintf(fstats, "%1.1f;", kcalc);
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} else {
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fprintf(fstats, "%1.1f;", 0.0);
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}
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}
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if (kcalc < 39.00f) return true;
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return false;
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}
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static void free_candidates_memory(statelist_t *sl)
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@ -1607,6 +1664,26 @@ out:
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return key;
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}
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static void* check_thread()
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{
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num_good_first_bytes = estimate_second_byte_sum();
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clock_t time1 = clock();
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cracking = generate_candidates(first_byte_Sum, nonces[best_first_bytes[0]].Sum8_guess);
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time1 = clock() - time1;
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if ( time1 > 0 ) PrintAndLog("Time for generating key candidates list: %1.0f seconds", ((float)time1)/CLOCKS_PER_SEC);
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if (known_target_key != -1) brute_force();
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if (cracking) {
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field_off = brute_force(); // switch off field with next SendCommand and then finish
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cracking = false;
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}
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thread_check_done = true;
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return (void *) NULL;
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}
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static void* crack_states_thread(void* x){
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const size_t thread_id = (size_t)x;
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size_t current_bucket = thread_id;
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@ -1630,73 +1707,80 @@ static void* crack_states_thread(void* x){
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return NULL;
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}
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static void brute_force(void)
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static bool brute_force(void)
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{
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bool ret = false;
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if (known_target_key != -1) {
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PrintAndLog("Looking for known target key in remaining key space...");
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TestIfKeyExists(known_target_key);
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ret = TestIfKeyExists(known_target_key);
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} else {
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PrintAndLog("Brute force phase starting.");
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time_t start, end;
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time(&start);
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keys_found = 0;
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if (maximum_states == 0) return false; // prevent keyspace reduction error (2^-inf)
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PrintAndLog("Brute force phase starting.");
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time_t start, end;
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time(&start);
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keys_found = 0;
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foundkey = 0;
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crypto1_bs_init();
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crypto1_bs_init();
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PrintAndLog("Using %u-bit bitslices", MAX_BITSLICES);
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PrintAndLog("Bitslicing best_first_byte^uid[3] (rollback byte): %02x...", best_first_bytes[0]^(cuid>>24));
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// convert to 32 bit little-endian
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PrintAndLog("Using %u-bit bitslices", MAX_BITSLICES);
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PrintAndLog("Bitslicing best_first_byte^uid[3] (rollback byte): %02x...", best_first_bytes[0]^(cuid>>24));
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// convert to 32 bit little-endian
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crypto1_bs_bitslice_value32((best_first_bytes[0]<<24)^cuid, bitsliced_rollback_byte, 8);
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PrintAndLog("Bitslicing nonces...");
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for(size_t tests = 0; tests < NONCE_TESTS; tests++){
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uint32_t test_nonce = brute_force_nonces[tests]->nonce_enc;
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uint8_t test_parity = brute_force_nonces[tests]->par_enc;
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// pre-xor the uid into the decrypted nonces, and also pre-xor the cuid parity into the encrypted parity bits - otherwise an exta xor is required in the decryption routine
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crypto1_bs_bitslice_value32(cuid^test_nonce, bitsliced_encrypted_nonces[tests], 32);
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// convert to 32 bit little-endian
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crypto1_bs_bitslice_value32(rev32( ~(test_parity ^ ~(parity(cuid>>24 & 0xff)<<3 | parity(cuid>>16 & 0xff)<<2 | parity(cuid>>8 & 0xff)<<1 | parity(cuid&0xff)))), bitsliced_encrypted_parity_bits[tests], 4);
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PrintAndLog("Bitslicing nonces...");
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for(size_t tests = 0; tests < NONCE_TESTS; tests++){
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uint32_t test_nonce = brute_force_nonces[tests]->nonce_enc;
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uint8_t test_parity = brute_force_nonces[tests]->par_enc;
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// pre-xor the uid into the decrypted nonces, and also pre-xor the cuid parity into the encrypted parity bits - otherwise an exta xor is required in the decryption routine
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crypto1_bs_bitslice_value32(cuid^test_nonce, bitsliced_encrypted_nonces[tests], 32);
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// convert to 32 bit little-endian
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crypto1_bs_bitslice_value32(rev32( ~(test_parity ^ ~(parity(cuid>>24 & 0xff)<<3 | parity(cuid>>16 & 0xff)<<2 | parity(cuid>>8 & 0xff)<<1 | parity(cuid&0xff)))), bitsliced_encrypted_parity_bits[tests], 4);
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}
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total_states_tested = 0;
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total_states_tested = 0;
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// count number of states to go
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bucket_count = 0;
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for (statelist_t *p = candidates; p != NULL; p = p->next) {
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buckets[bucket_count] = p;
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bucket_count++;
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}
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// count number of states to go
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bucket_count = 0;
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for (statelist_t *p = candidates; p != NULL; p = p->next) {
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buckets[bucket_count] = p;
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bucket_count++;
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}
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#ifndef __WIN32
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thread_count = sysconf(_SC_NPROCESSORS_CONF);
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thread_count = sysconf(_SC_NPROCESSORS_CONF);
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if ( thread_count < 1)
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thread_count = 1;
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#endif /* _WIN32 */
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pthread_t threads[thread_count];
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pthread_t threads[thread_count];
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// enumerate states using all hardware threads, each thread handles one bucket
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PrintAndLog("Starting %u cracking threads to search %u buckets containing a total of %"PRIu64" states...", thread_count, bucket_count, maximum_states);
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// enumerate states using all hardware threads, each thread handles one bucket
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PrintAndLog("Starting %u cracking threads to search %u buckets containing a total of %"PRIu64" states...", thread_count, bucket_count, maximum_states);
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for(size_t i = 0; i < thread_count; i++){
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pthread_create(&threads[i], NULL, crack_states_thread, (void*) i);
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}
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for(size_t i = 0; i < thread_count; i++){
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pthread_join(threads[i], 0);
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}
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for(size_t i = 0; i < thread_count; i++){
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pthread_create(&threads[i], NULL, crack_states_thread, (void*) i);
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}
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for(size_t i = 0; i < thread_count; i++){
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pthread_join(threads[i], 0);
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}
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time(&end);
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double elapsed_time = difftime(end, start);
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time(&end);
|
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double elapsed_time = difftime(end, start);
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if(keys_found){
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if (keys_found && TestIfKeyExists(foundkey)) {
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PrintAndLog("Success! Tested %"PRIu32" states, found %u keys after %.f seconds", total_states_tested, keys_found, elapsed_time);
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PrintAndLog("\nFound key: %012"PRIx64"\n", foundkey);
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} else {
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ret = true;
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} else {
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PrintAndLog("Fail! Tested %"PRIu32" states, in %.f seconds", total_states_tested, elapsed_time);
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}
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// reset this counter for the next call
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nonces_to_bruteforce = 0;
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// reset this counter for the next call
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nonces_to_bruteforce = 0;
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}
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return ret;
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}
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int mfnestedhard(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *trgkey, bool nonce_file_read, bool nonce_file_write, bool slow, int tests)
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@ -1737,6 +1821,7 @@ int mfnestedhard(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBloc
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candidates = NULL;
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}
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fclose(fstats);
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fstats = NULL;
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} else {
|
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init_nonce_memory();
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if (nonce_file_read) { // use pre-acquired data from file nonces.bin
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|
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@ -1767,15 +1852,16 @@ int mfnestedhard(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBloc
|
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// best_first_bytes[7],
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// best_first_bytes[8],
|
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// best_first_bytes[9] );
|
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PrintAndLog("Number of first bytes with confidence > %2.1f%%: %d", CONFIDENCE_THRESHOLD*100.0, num_good_first_bytes);
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|
||||
clock_t time1 = clock();
|
||||
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);
|
||||
//PrintAndLog("Number of first bytes with confidence > %2.1f%%: %d", CONFIDENCE_THRESHOLD*100.0, num_good_first_bytes);
|
||||
|
||||
brute_force();
|
||||
//clock_t time1 = clock();
|
||||
//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);
|
||||
|
||||
//brute_force();
|
||||
|
||||
free_nonces_memory();
|
||||
free_statelist_cache();
|
||||
|
|
|
|||
|
|
@ -167,9 +167,10 @@ static void *main_loop(void *targ) {
|
|||
// this one should pick up all non-null cmd...
|
||||
// why is there a
|
||||
if (cmd) {
|
||||
|
||||
while(cmd[strlen(cmd) - 1] == ' ')
|
||||
cmd[strlen(cmd) - 1] = 0x00;
|
||||
if (strlen(cmd) > 0) {
|
||||
while(cmd[strlen(cmd) - 1] == ' ')
|
||||
cmd[strlen(cmd) - 1] = 0x00;
|
||||
}
|
||||
|
||||
if (cmd[0] != 0x00) {
|
||||
int ret = CommandReceived(cmd);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue