142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <pthread.h>
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#include "craptev1.h"
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#include "crypto1_bs.h"
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#include "crypto1_bs_crack.h"
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#include <inttypes.h>
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#define __STDC_FORMAT_MACROS
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#define llx PRIx64
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#define lli PRIi64
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#define llu PRIu64
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#define lu PRIu32
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#define VT100_cleareol "\r\33[2K"
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uint64_t split(uint8_t p){
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return (((p & 0x8) >>3 )| ((p & 0x4) >> 2) << 8 | ((p & 0x2) >> 1) << 16 | (p & 0x1) << 24 );
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}
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uint32_t uid;
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uint64_t *readnonces(char* fname){
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int i;
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FILE *f = fopen(fname, "rb");
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uint64_t *nonces = malloc(sizeof (uint64_t) << 24);
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if(fread(&uid, 1, 4, f)){
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uid = rev32(uid);
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}
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fseek(f, 6, SEEK_SET);
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i = 0;
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while(!feof(f)){
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uint32_t nt_enc1, nt_enc2;
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uint8_t par_enc;
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if(fread(&nt_enc1, 1, 4, f) && fread(&nt_enc2, 1, 4, f) && fread(&par_enc, 1, 1, f)){
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nonces[i ] = split(~(par_enc >> 4)) << 32 | nt_enc1;
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nonces[i+1] = split(~(par_enc & 0xff)) << 32 | nt_enc2;
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i += 2;
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}
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}
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nonces[i] = -1;
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fclose(f);
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return nonces;
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}
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uint32_t **space;
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uint8_t thread_count = 1;
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void* crack_states_thread(void* x){
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const size_t thread_id = (size_t)x;
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int j;
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for(j = thread_id; space[j * 5]; j += thread_count) {
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const uint64_t key = crack_states_bitsliced(space + j * 5);
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if(key != -1){
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printf("Found key: %012"llx"\n", key);
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break;
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} else if(keys_found){
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break;
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}
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}
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return NULL;
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}
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void notify_status_offline(int sig){
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printf(VT100_cleareol "Cracking... %6.02f%%", (100.0*total_states_tested/(total_states)));
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alarm(1);
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fflush(stdout);
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signal(SIGALRM, notify_status_offline);
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}
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int main(int argc, char* argv[]){
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if(argc != 2){
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printf("Usage: %s <nonces.bin>\n", argv[0]);
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return -1;
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}
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printf("Reading nonces...\n");
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uint64_t *nonces = readnonces(argv[1]);
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printf("Deriving search space...\n");
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space = craptev1_get_space(nonces, 95, uid);
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total_states = craptev1_sizeof_space(space);
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#ifndef __WIN32
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thread_count = sysconf(_SC_NPROCESSORS_CONF);
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#else
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thread_count = 1;
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#endif
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// append some zeroes to the end of the space to make sure threads don't go off into the wild
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size_t j = 0;
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for(j = 0; space[j]; j+=5){
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}
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size_t fill = j + (5*thread_count);
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for(; j < fill; j++) {
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space[j] = 0;
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}
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pthread_t threads[thread_count];
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size_t i;
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printf("Initializing BS crypto-1\n");
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crypto1_bs_init();
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printf("Using %u-bit bitslices\n", MAX_BITSLICES);
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uint8_t rollback_byte = **space;
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printf("Bitslicing rollback byte: %02x...\n", rollback_byte);
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// convert to 32 bit little-endian
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crypto1_bs_bitslice_value32(rev32((rollback_byte)), bitsliced_rollback_byte, 8);
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printf("Bitslicing nonces...\n");
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for(size_t tests = 0; tests < NONCE_TESTS; tests++){
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// pre-xor the uid into the decrypted nonces, and also pre-xor the uid parity into the encrypted parity bits - otherwise an exta xor is required in the decryption routine
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uint32_t test_nonce = uid^rev32(nonces[tests]);
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uint32_t test_parity = (nonces[tests]>>32)^rev32(uid);
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test_parity = ((parity(test_parity >> 24 & 0xff) & 1) | (parity(test_parity>>16 & 0xff) & 1)<<1 | (parity(test_parity>>8 & 0xff) & 1)<<2 | (parity(test_parity &0xff) & 1) << 3);
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crypto1_bs_bitslice_value32(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(~(test_parity)<<24, bitsliced_encrypted_parity_bits[tests], 4);
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}
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total_states_tested = 0;
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keys_found = 0;
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printf("Starting %u threads to test %"llu" states\n", thread_count, total_states);
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signal(SIGALRM, notify_status_offline);
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alarm(1);
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for(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(i = 0; i < thread_count; i++){
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pthread_join(threads[i], 0);
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}
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alarm(0);
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printf("Tested %"llu" states\n", total_states_tested);
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craptev1_destroy_space(space);
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return 0;
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}
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