mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 23:36:31 +08:00
2387 lines
101 KiB
C
2387 lines
101 KiB
C
//-----------------------------------------------------------------------------
|
|
// Copyright (C) 2015, 2016 by piwi
|
|
// fiddled with 2016 Azcid (hardnested bitsliced Bruteforce imp)
|
|
// fiddled with 2016 Matrix ( sub testing of nonces while collecting )
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// at your option, any later version. See the LICENSE.txt file for the text of
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// Implements a card only attack based on crypto text (encrypted nonces
|
|
// received during a nested authentication) only. Unlike other card only
|
|
// attacks this doesn't rely on implementation errors but only on the
|
|
// inherent weaknesses of the crypto1 cypher. Described in
|
|
// Carlo Meijer, Roel Verdult, "Ciphertext-only Cryptanalysis on Hardened
|
|
// Mifare Classic Cards" in Proceedings of the 22nd ACM SIGSAC Conference on
|
|
// Computer and Communications Security, 2015
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "cmdhfmfhard.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <inttypes.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <pthread.h>
|
|
#include <locale.h>
|
|
#include <math.h>
|
|
#include "proxmark3.h"
|
|
#include "cmdmain.h"
|
|
#include "ui.h"
|
|
#include "util.h"
|
|
#include "util_posix.h"
|
|
#include "crapto1/crapto1.h"
|
|
#include "parity.h"
|
|
#include "hardnested/hardnested_bruteforce.h"
|
|
#include "hardnested/hardnested_bf_core.h"
|
|
#include "hardnested/hardnested_bitarray_core.h"
|
|
#include "zlib.h"
|
|
|
|
#define NUM_CHECK_BITFLIPS_THREADS (num_CPUs())
|
|
#define NUM_REDUCTION_WORKING_THREADS (num_CPUs())
|
|
|
|
#define IGNORE_BITFLIP_THRESHOLD 0.99 // ignore bitflip arrays which have nearly only valid states
|
|
|
|
#define STATE_FILES_DIRECTORY "hardnested/tables/"
|
|
#define STATE_FILE_TEMPLATE "bitflip_%d_%03" PRIx16 "_states.bin.z"
|
|
|
|
#define DEBUG_KEY_ELIMINATION
|
|
// #define DEBUG_REDUCTION
|
|
|
|
static uint16_t sums[NUM_SUMS] = {0, 32, 56, 64, 80, 96, 104, 112, 120, 128, 136, 144, 152, 160, 176, 192, 200, 224, 256}; // possible sum property values
|
|
|
|
#define NUM_PART_SUMS 9 // number of possible partial sum property values
|
|
|
|
typedef enum {
|
|
EVEN_STATE = 0,
|
|
ODD_STATE = 1
|
|
} odd_even_t;
|
|
|
|
static uint32_t num_acquired_nonces = 0;
|
|
static uint64_t start_time = 0;
|
|
static uint16_t effective_bitflip[2][0x400];
|
|
static uint16_t num_effective_bitflips[2] = {0, 0};
|
|
static uint16_t all_effective_bitflip[0x400];
|
|
static uint16_t num_all_effective_bitflips = 0;
|
|
static uint16_t num_1st_byte_effective_bitflips = 0;
|
|
#define CHECK_1ST_BYTES 0x01
|
|
#define CHECK_2ND_BYTES 0x02
|
|
static uint8_t hardnested_stage = CHECK_1ST_BYTES;
|
|
static uint64_t known_target_key;
|
|
static uint32_t test_state[2] = {0, 0};
|
|
static float brute_force_per_second;
|
|
|
|
|
|
static void get_SIMD_instruction_set(char *instruction_set) {
|
|
switch (GetSIMDInstrAuto()) {
|
|
case SIMD_AVX512:
|
|
strcpy(instruction_set, "AVX512F");
|
|
break;
|
|
case SIMD_AVX2:
|
|
strcpy(instruction_set, "AVX2");
|
|
break;
|
|
case SIMD_AVX:
|
|
strcpy(instruction_set, "AVX");
|
|
break;
|
|
case SIMD_SSE2:
|
|
strcpy(instruction_set, "SSE2");
|
|
break;
|
|
case SIMD_MMX:
|
|
strcpy(instruction_set, "MMX");
|
|
break;
|
|
default:
|
|
strcpy(instruction_set, "no");
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void print_progress_header(void) {
|
|
char progress_text[80];
|
|
char instr_set[12] = "";
|
|
get_SIMD_instruction_set(instr_set);
|
|
sprintf(progress_text, "Start using %d threads and %s SIMD core", num_CPUs(), instr_set);
|
|
PrintAndLogEx(NORMAL, "\n\n");
|
|
PrintAndLogEx(NORMAL, " time | #nonces | Activity | expected to brute force");
|
|
PrintAndLogEx(NORMAL, " | | | #states | time ");
|
|
PrintAndLogEx(NORMAL, "------------------------------------------------------------------------------------------------------");
|
|
PrintAndLogEx(NORMAL, " 0 | 0 | %-55s | |", progress_text);
|
|
}
|
|
|
|
|
|
void hardnested_print_progress(uint32_t nonces, const char *activity, float brute_force, uint64_t min_diff_print_time) {
|
|
static uint64_t last_print_time = 0;
|
|
if (msclock() - last_print_time > min_diff_print_time) {
|
|
last_print_time = msclock();
|
|
uint64_t total_time = msclock() - start_time;
|
|
float brute_force_time = brute_force / brute_force_per_second;
|
|
char brute_force_time_string[20];
|
|
if (brute_force_time < 90) {
|
|
sprintf(brute_force_time_string, "%2.0fs", brute_force_time);
|
|
} else if (brute_force_time < 60 * 90) {
|
|
sprintf(brute_force_time_string, "%2.0fmin", brute_force_time / 60);
|
|
} else if (brute_force_time < 60 * 60 * 36) {
|
|
sprintf(brute_force_time_string, "%2.0fh", brute_force_time / (60 * 60));
|
|
} else {
|
|
sprintf(brute_force_time_string, "%2.0fd", brute_force_time / (60 * 60 * 24));
|
|
}
|
|
PrintAndLogEx(NORMAL, " %7.0f | %7u | %-55s | %15.0f | %5s", (float)total_time / 1000.0, nonces, activity, brute_force, brute_force_time_string);
|
|
}
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// bitarray functions
|
|
|
|
static inline void clear_bitarray24(uint32_t *bitarray) {
|
|
memset(bitarray, 0x00, sizeof(uint32_t) * (1 << 19));
|
|
}
|
|
|
|
|
|
static inline void set_bitarray24(uint32_t *bitarray) {
|
|
memset(bitarray, 0xff, sizeof(uint32_t) * (1 << 19));
|
|
}
|
|
|
|
|
|
static inline void set_bit24(uint32_t *bitarray, uint32_t index) {
|
|
bitarray[index >> 5] |= 0x80000000 >> (index & 0x0000001f);
|
|
}
|
|
|
|
static inline uint32_t test_bit24(uint32_t *bitarray, uint32_t index) {
|
|
return bitarray[index >> 5] & (0x80000000 >> (index & 0x0000001f));
|
|
}
|
|
|
|
|
|
static inline uint32_t next_state(uint32_t *bitarray, uint32_t state) {
|
|
if (++state == 1 << 24) return 1 << 24;
|
|
uint32_t index = state >> 5;
|
|
uint_fast8_t bit = state & 0x1f;
|
|
uint32_t line = bitarray[index] << bit;
|
|
while (bit <= 0x1f) {
|
|
if (line & 0x80000000) return state;
|
|
state++;
|
|
bit++;
|
|
line <<= 1;
|
|
}
|
|
index++;
|
|
while (bitarray[index] == 0x00000000 && state < 1 << 24) {
|
|
index++;
|
|
state += 0x20;
|
|
}
|
|
if (state >= 1 << 24) return 1 << 24;
|
|
#if defined __GNUC__
|
|
return state + __builtin_clz(bitarray[index]);
|
|
#else
|
|
bit = 0x00;
|
|
line = bitarray[index];
|
|
while (bit <= 0x1f) {
|
|
if (line & 0x80000000) return state;
|
|
state++;
|
|
bit++;
|
|
line <<= 1;
|
|
}
|
|
return 1 << 24;
|
|
#endif
|
|
}
|
|
|
|
|
|
#define BITFLIP_2ND_BYTE 0x0200
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// bitflip property bitarrays
|
|
|
|
static uint32_t *bitflip_bitarrays[2][0x400];
|
|
static uint32_t count_bitflip_bitarrays[2][0x400];
|
|
|
|
static int compare_count_bitflip_bitarrays(const void *b1, const void *b2) {
|
|
uint64_t count1 = (uint64_t)count_bitflip_bitarrays[ODD_STATE][*(uint16_t *)b1] * count_bitflip_bitarrays[EVEN_STATE][*(uint16_t *)b1];
|
|
uint64_t count2 = (uint64_t)count_bitflip_bitarrays[ODD_STATE][*(uint16_t *)b2] * count_bitflip_bitarrays[EVEN_STATE][*(uint16_t *)b2];
|
|
return (count1 > count2) - (count2 > count1);
|
|
}
|
|
|
|
|
|
static voidpf inflate_malloc(voidpf opaque, uInt items, uInt size) {
|
|
return calloc(items * size, sizeof(uint8_t));
|
|
}
|
|
|
|
|
|
static void inflate_free(voidpf opaque, voidpf address) {
|
|
free(address);
|
|
}
|
|
|
|
#define OUTPUT_BUFFER_LEN 80
|
|
#define INPUT_BUFFER_LEN 80
|
|
|
|
//----------------------------------------------------------------------------
|
|
// Initialize decompression of the respective (HF or LF) FPGA stream
|
|
//----------------------------------------------------------------------------
|
|
static void init_inflate(z_streamp compressed_stream, uint8_t *input_buffer, uint32_t insize, uint8_t *output_buffer, uint32_t outsize) {
|
|
|
|
// initialize z_stream structure for inflate:
|
|
compressed_stream->next_in = input_buffer;
|
|
compressed_stream->avail_in = insize;
|
|
compressed_stream->next_out = output_buffer;
|
|
compressed_stream->avail_out = outsize;
|
|
compressed_stream->zalloc = &inflate_malloc;
|
|
compressed_stream->zfree = &inflate_free;
|
|
|
|
inflateInit2(compressed_stream, 0);
|
|
|
|
}
|
|
|
|
|
|
static void init_bitflip_bitarrays(void) {
|
|
#if defined (DEBUG_REDUCTION)
|
|
uint8_t line = 0;
|
|
#endif
|
|
|
|
|
|
z_stream compressed_stream;
|
|
|
|
char state_files_path[strlen(get_my_executable_directory()) + strlen(STATE_FILES_DIRECTORY) + strlen(STATE_FILE_TEMPLATE) + 1];
|
|
char state_file_name[strlen(STATE_FILE_TEMPLATE) + 1];
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
num_effective_bitflips[odd_even] = 0;
|
|
for (uint16_t bitflip = 0x001; bitflip < 0x400; bitflip++) {
|
|
bitflip_bitarrays[odd_even][bitflip] = NULL;
|
|
count_bitflip_bitarrays[odd_even][bitflip] = 1 << 24;
|
|
sprintf(state_file_name, STATE_FILE_TEMPLATE, odd_even, bitflip);
|
|
strcpy(state_files_path, get_my_executable_directory());
|
|
strcat(state_files_path, STATE_FILES_DIRECTORY);
|
|
strcat(state_files_path, state_file_name);
|
|
FILE *statesfile = fopen(state_files_path, "rb");
|
|
if (statesfile == NULL) {
|
|
continue;
|
|
} else {
|
|
fseek(statesfile, 0, SEEK_END);
|
|
int fsize = ftell(statesfile);
|
|
if (fsize == -1) {
|
|
PrintAndLogEx(WARNING, "File read error with %s. Aborting...\n", state_file_name);
|
|
fclose(statesfile);
|
|
exit(5);
|
|
}
|
|
uint32_t filesize = (uint32_t)fsize;
|
|
rewind(statesfile);
|
|
uint8_t input_buffer[filesize];
|
|
size_t bytesread = fread(input_buffer, 1, filesize, statesfile);
|
|
if (bytesread != filesize) {
|
|
PrintAndLogEx(WARNING, "File read error with %s. Aborting...\n", state_file_name);
|
|
fclose(statesfile);
|
|
//inflateEnd(&compressed_stream);
|
|
exit(5);
|
|
}
|
|
fclose(statesfile);
|
|
uint32_t count = 0;
|
|
init_inflate(&compressed_stream, input_buffer, filesize, (uint8_t *)&count, sizeof(count));
|
|
inflate(&compressed_stream, Z_SYNC_FLUSH);
|
|
if ((float)count / (1 << 24) < IGNORE_BITFLIP_THRESHOLD) {
|
|
uint32_t *bitset = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (bitset == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_bitflip_statelists(). Aborting...\n");
|
|
inflateEnd(&compressed_stream);
|
|
exit(4);
|
|
}
|
|
compressed_stream.next_out = (uint8_t *)bitset;
|
|
compressed_stream.avail_out = sizeof(uint32_t) * (1 << 19);
|
|
inflate(&compressed_stream, Z_SYNC_FLUSH);
|
|
effective_bitflip[odd_even][num_effective_bitflips[odd_even]++] = bitflip;
|
|
bitflip_bitarrays[odd_even][bitflip] = bitset;
|
|
count_bitflip_bitarrays[odd_even][bitflip] = count;
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "(%03" PRIx16 " %s:%5.1f%%) ", bitflip, odd_even ? "odd " : "even", (float)count / (1 << 24) * 100.0);
|
|
line++;
|
|
if (line == 8) {
|
|
PrintAndLogEx(NORMAL, "\n");
|
|
line = 0;
|
|
}
|
|
#endif
|
|
}
|
|
inflateEnd(&compressed_stream);
|
|
}
|
|
}
|
|
effective_bitflip[odd_even][num_effective_bitflips[odd_even]] = 0x400; // EndOfList marker
|
|
}
|
|
|
|
uint16_t i = 0;
|
|
uint16_t j = 0;
|
|
num_all_effective_bitflips = 0;
|
|
num_1st_byte_effective_bitflips = 0;
|
|
while (i < num_effective_bitflips[EVEN_STATE] || j < num_effective_bitflips[ODD_STATE]) {
|
|
if (effective_bitflip[EVEN_STATE][i] < effective_bitflip[ODD_STATE][j]) {
|
|
all_effective_bitflip[num_all_effective_bitflips++] = effective_bitflip[EVEN_STATE][i];
|
|
i++;
|
|
} else if (effective_bitflip[EVEN_STATE][i] > effective_bitflip[ODD_STATE][j]) {
|
|
all_effective_bitflip[num_all_effective_bitflips++] = effective_bitflip[ODD_STATE][j];
|
|
j++;
|
|
} else {
|
|
all_effective_bitflip[num_all_effective_bitflips++] = effective_bitflip[EVEN_STATE][i];
|
|
i++;
|
|
j++;
|
|
}
|
|
if (!(all_effective_bitflip[num_all_effective_bitflips - 1] & BITFLIP_2ND_BYTE)) {
|
|
num_1st_byte_effective_bitflips = num_all_effective_bitflips;
|
|
}
|
|
}
|
|
qsort(all_effective_bitflip, num_1st_byte_effective_bitflips, sizeof(uint16_t), compare_count_bitflip_bitarrays);
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "\n1st byte effective bitflips (%d): \n", num_1st_byte_effective_bitflips);
|
|
for (uint16_t i = 0; i < num_1st_byte_effective_bitflips; i++) {
|
|
PrintAndLogEx(NORMAL, "%03x ", all_effective_bitflip[i]);
|
|
}
|
|
#endif
|
|
qsort(all_effective_bitflip + num_1st_byte_effective_bitflips, num_all_effective_bitflips - num_1st_byte_effective_bitflips, sizeof(uint16_t), compare_count_bitflip_bitarrays);
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "\n2nd byte effective bitflips (%d): \n", num_all_effective_bitflips - num_1st_byte_effective_bitflips);
|
|
for (uint16_t i = num_1st_byte_effective_bitflips; i < num_all_effective_bitflips; i++) {
|
|
PrintAndLogEx(NORMAL, "%03x ", all_effective_bitflip[i]);
|
|
}
|
|
#endif
|
|
char progress_text[80];
|
|
sprintf(progress_text, "Using %d precalculated bitflip state tables", num_all_effective_bitflips);
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
}
|
|
|
|
|
|
static void free_bitflip_bitarrays(void) {
|
|
for (int16_t bitflip = 0x3ff; bitflip > 0x000; bitflip--) {
|
|
free_bitarray(bitflip_bitarrays[ODD_STATE][bitflip]);
|
|
}
|
|
for (int16_t bitflip = 0x3ff; bitflip > 0x000; bitflip--) {
|
|
free_bitarray(bitflip_bitarrays[EVEN_STATE][bitflip]);
|
|
}
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// sum property bitarrays
|
|
|
|
static uint32_t *part_sum_a0_bitarrays[2][NUM_PART_SUMS];
|
|
static uint32_t *part_sum_a8_bitarrays[2][NUM_PART_SUMS];
|
|
static uint32_t *sum_a0_bitarrays[2][NUM_SUMS];
|
|
|
|
static uint16_t PartialSumProperty(uint32_t state, odd_even_t odd_even) {
|
|
uint16_t sum = 0;
|
|
for (uint16_t j = 0; j < 16; j++) {
|
|
uint32_t st = state;
|
|
uint16_t part_sum = 0;
|
|
if (odd_even == ODD_STATE) {
|
|
part_sum ^= filter(st);
|
|
for (uint16_t i = 0; i < 4; i++) {
|
|
st = (st << 1) | ((j >> (3 - i)) & 0x01) ;
|
|
part_sum ^= filter(st);
|
|
}
|
|
part_sum ^= 1; // XOR 1 cancelled out for the other 8 bits
|
|
} else {
|
|
for (uint16_t i = 0; i < 4; i++) {
|
|
st = (st << 1) | ((j >> (3 - i)) & 0x01) ;
|
|
part_sum ^= filter(st);
|
|
}
|
|
}
|
|
sum += part_sum;
|
|
}
|
|
return sum;
|
|
}
|
|
|
|
|
|
static void init_part_sum_bitarrays(void) {
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
for (uint16_t part_sum_a0 = 0; part_sum_a0 < NUM_PART_SUMS; part_sum_a0++) {
|
|
part_sum_a0_bitarrays[odd_even][part_sum_a0] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (part_sum_a0_bitarrays[odd_even][part_sum_a0] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_part_suma0_statelists(). Aborting...\n");
|
|
exit(4);
|
|
}
|
|
clear_bitarray24(part_sum_a0_bitarrays[odd_even][part_sum_a0]);
|
|
}
|
|
}
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
//PrintAndLogEx(NORMAL, "(%d, %" PRIu16 ")...", odd_even, part_sum_a0);
|
|
for (uint32_t state = 0; state < (1 << 20); state++) {
|
|
uint16_t part_sum_a0 = PartialSumProperty(state, odd_even) / 2;
|
|
for (uint16_t low_bits = 0; low_bits < 1 << 4; low_bits++) {
|
|
set_bit24(part_sum_a0_bitarrays[odd_even][part_sum_a0], state << 4 | low_bits);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
for (uint16_t part_sum_a8 = 0; part_sum_a8 < NUM_PART_SUMS; part_sum_a8++) {
|
|
part_sum_a8_bitarrays[odd_even][part_sum_a8] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (part_sum_a8_bitarrays[odd_even][part_sum_a8] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_part_suma8_statelists(). Aborting...\n");
|
|
exit(4);
|
|
}
|
|
clear_bitarray24(part_sum_a8_bitarrays[odd_even][part_sum_a8]);
|
|
}
|
|
}
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
//PrintAndLogEx(NORMAL, "(%d, %" PRIu16 ")...", odd_even, part_sum_a8);
|
|
for (uint32_t state = 0; state < (1 << 20); state++) {
|
|
uint16_t part_sum_a8 = PartialSumProperty(state, odd_even) / 2;
|
|
for (uint16_t high_bits = 0; high_bits < 1 << 4; high_bits++) {
|
|
set_bit24(part_sum_a8_bitarrays[odd_even][part_sum_a8], state | high_bits << 20);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void free_part_sum_bitarrays(void) {
|
|
for (int16_t part_sum_a8 = (NUM_PART_SUMS - 1); part_sum_a8 >= 0; part_sum_a8--) {
|
|
free_bitarray(part_sum_a8_bitarrays[ODD_STATE][part_sum_a8]);
|
|
}
|
|
for (int16_t part_sum_a8 = (NUM_PART_SUMS - 1); part_sum_a8 >= 0; part_sum_a8--) {
|
|
free_bitarray(part_sum_a8_bitarrays[EVEN_STATE][part_sum_a8]);
|
|
}
|
|
for (int16_t part_sum_a0 = (NUM_PART_SUMS - 1); part_sum_a0 >= 0; part_sum_a0--) {
|
|
free_bitarray(part_sum_a0_bitarrays[ODD_STATE][part_sum_a0]);
|
|
}
|
|
for (int16_t part_sum_a0 = (NUM_PART_SUMS - 1); part_sum_a0 >= 0; part_sum_a0--) {
|
|
free_bitarray(part_sum_a0_bitarrays[EVEN_STATE][part_sum_a0]);
|
|
}
|
|
}
|
|
|
|
|
|
static void init_sum_bitarrays(void) {
|
|
for (uint16_t sum_a0 = 0; sum_a0 < NUM_SUMS; sum_a0++) {
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
sum_a0_bitarrays[odd_even][sum_a0] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (sum_a0_bitarrays[odd_even][sum_a0] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_sum_bitarrays(). Aborting...\n");
|
|
exit(4);
|
|
}
|
|
clear_bitarray24(sum_a0_bitarrays[odd_even][sum_a0]);
|
|
}
|
|
}
|
|
for (uint8_t p = 0; p < NUM_PART_SUMS; p++) {
|
|
for (uint8_t q = 0; q < NUM_PART_SUMS; q++) {
|
|
uint16_t sum_a0 = 2 * p * (16 - 2 * q) + (16 - 2 * p) * 2 * q;
|
|
uint16_t sum_a0_idx = 0;
|
|
while (sums[sum_a0_idx] != sum_a0) sum_a0_idx++;
|
|
bitarray_OR(sum_a0_bitarrays[EVEN_STATE][sum_a0_idx], part_sum_a0_bitarrays[EVEN_STATE][q]);
|
|
bitarray_OR(sum_a0_bitarrays[ODD_STATE][sum_a0_idx], part_sum_a0_bitarrays[ODD_STATE][p]);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void free_sum_bitarrays(void) {
|
|
for (int8_t sum_a0 = NUM_SUMS - 1; sum_a0 >= 0; sum_a0--) {
|
|
free_bitarray(sum_a0_bitarrays[ODD_STATE][sum_a0]);
|
|
free_bitarray(sum_a0_bitarrays[EVEN_STATE][sum_a0]);
|
|
}
|
|
}
|
|
|
|
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
char failstr[250] = "";
|
|
#endif
|
|
|
|
static const float p_K0[NUM_SUMS] = { // the probability that a random nonce has a Sum Property K
|
|
0.0290, 0.0083, 0.0006, 0.0339, 0.0048, 0.0934, 0.0119, 0.0489, 0.0602, 0.4180, 0.0602, 0.0489, 0.0119, 0.0934, 0.0048, 0.0339, 0.0006, 0.0083, 0.0290
|
|
};
|
|
|
|
static float my_p_K[NUM_SUMS];
|
|
|
|
static const float *p_K;
|
|
|
|
static uint32_t cuid;
|
|
static noncelist_t nonces[256];
|
|
static uint8_t best_first_bytes[256];
|
|
static uint64_t maximum_states = 0;
|
|
static uint8_t best_first_byte_smallest_bitarray = 0;
|
|
static uint16_t first_byte_Sum = 0;
|
|
static uint16_t first_byte_num = 0;
|
|
static bool write_stats = false;
|
|
static FILE *fstats = NULL;
|
|
static uint32_t *all_bitflips_bitarray[2];
|
|
static uint32_t num_all_bitflips_bitarray[2];
|
|
static bool all_bitflips_bitarray_dirty[2];
|
|
static uint64_t last_sample_clock = 0;
|
|
static uint64_t sample_period = 0;
|
|
static uint64_t num_keys_tested = 0;
|
|
static statelist_t *candidates = NULL;
|
|
|
|
|
|
static int add_nonce(uint32_t nonce_enc, uint8_t par_enc) {
|
|
uint8_t first_byte = nonce_enc >> 24;
|
|
noncelistentry_t *p1 = nonces[first_byte].first;
|
|
noncelistentry_t *p2 = NULL;
|
|
|
|
if (p1 == NULL) { // first nonce with this 1st byte
|
|
first_byte_num++;
|
|
first_byte_Sum += evenparity32((nonce_enc & 0xff000000) | (par_enc & 0x08));
|
|
}
|
|
|
|
while (p1 != NULL && (p1->nonce_enc & 0x00ff0000) < (nonce_enc & 0x00ff0000)) {
|
|
p2 = p1;
|
|
p1 = p1->next;
|
|
}
|
|
|
|
if (p1 == NULL) { // need to add at the end of the list
|
|
if (p2 == NULL) { // list is empty yet. Add first entry.
|
|
p2 = nonces[first_byte].first = malloc(sizeof(noncelistentry_t));
|
|
} else { // add new entry at end of existing list.
|
|
p2 = p2->next = malloc(sizeof(noncelistentry_t));
|
|
}
|
|
} else if ((p1->nonce_enc & 0x00ff0000) != (nonce_enc & 0x00ff0000)) { // found distinct 2nd byte. Need to insert.
|
|
if (p2 == NULL) { // need to insert at start of list
|
|
p2 = nonces[first_byte].first = malloc(sizeof(noncelistentry_t));
|
|
} else {
|
|
p2 = p2->next = malloc(sizeof(noncelistentry_t));
|
|
}
|
|
} else { // we have seen this 2nd byte before. Nothing to add or insert.
|
|
return (0);
|
|
}
|
|
|
|
// add or insert new data
|
|
p2->next = p1;
|
|
p2->nonce_enc = nonce_enc;
|
|
p2->par_enc = par_enc;
|
|
|
|
nonces[first_byte].num++;
|
|
nonces[first_byte].Sum += evenparity32((nonce_enc & 0x00ff0000) | (par_enc & 0x04));
|
|
nonces[first_byte].sum_a8_guess_dirty = true; // indicates that we need to recalculate the Sum(a8) probability for this first byte
|
|
return (1); // new nonce added
|
|
}
|
|
|
|
|
|
static void init_nonce_memory(void) {
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
nonces[i].num = 0;
|
|
nonces[i].Sum = 0;
|
|
nonces[i].first = NULL;
|
|
for (uint16_t j = 0; j < NUM_SUMS; j++) {
|
|
nonces[i].sum_a8_guess[j].sum_a8_idx = j;
|
|
nonces[i].sum_a8_guess[j].prob = 0.0;
|
|
}
|
|
nonces[i].sum_a8_guess_dirty = false;
|
|
for (uint16_t bitflip = 0x000; bitflip < 0x400; bitflip++) {
|
|
nonces[i].BitFlips[bitflip] = 0;
|
|
}
|
|
nonces[i].states_bitarray[EVEN_STATE] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (nonces[i].states_bitarray[EVEN_STATE] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_nonce_memory(). Aborting...\n");
|
|
exit(4);
|
|
}
|
|
set_bitarray24(nonces[i].states_bitarray[EVEN_STATE]);
|
|
nonces[i].num_states_bitarray[EVEN_STATE] = 1 << 24;
|
|
nonces[i].states_bitarray[ODD_STATE] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (nonces[i].states_bitarray[ODD_STATE] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in init_nonce_memory(). Aborting...\n");
|
|
exit(4);
|
|
}
|
|
set_bitarray24(nonces[i].states_bitarray[ODD_STATE]);
|
|
nonces[i].num_states_bitarray[ODD_STATE] = 1 << 24;
|
|
nonces[i].all_bitflips_dirty[EVEN_STATE] = false;
|
|
nonces[i].all_bitflips_dirty[ODD_STATE] = false;
|
|
}
|
|
first_byte_num = 0;
|
|
first_byte_Sum = 0;
|
|
}
|
|
|
|
|
|
static void free_nonce_list(noncelistentry_t *p) {
|
|
if (p == NULL) {
|
|
return;
|
|
} else {
|
|
free_nonce_list(p->next);
|
|
free(p);
|
|
}
|
|
}
|
|
|
|
|
|
static void free_nonces_memory(void) {
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
free_nonce_list(nonces[i].first);
|
|
}
|
|
for (int i = 255; i >= 0; i--) {
|
|
free_bitarray(nonces[i].states_bitarray[ODD_STATE]);
|
|
free_bitarray(nonces[i].states_bitarray[EVEN_STATE]);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static double p_hypergeometric(uint16_t i_K, uint16_t n, uint16_t k) {
|
|
// for efficient computation we are using the recursive definition
|
|
// (K-k+1) * (n-k+1)
|
|
// P(X=k) = P(X=k-1) * --------------------
|
|
// k * (N-K-n+k)
|
|
// and
|
|
// (N-K)*(N-K-1)*...*(N-K-n+1)
|
|
// P(X=0) = -----------------------------
|
|
// N*(N-1)*...*(N-n+1)
|
|
|
|
|
|
uint16_t const N = 256;
|
|
uint16_t K = sums[i_K];
|
|
|
|
|
|
|
|
if (n - k > N - K || k > K) return 0.0; // avoids log(x<=0) in calculation below
|
|
if (k == 0) {
|
|
// use logarithms to avoid overflow with huge factorials (double type can only hold 170!)
|
|
double log_result = 0.0;
|
|
for (int16_t i = N - K; i >= N - K - n + 1; i--) {
|
|
log_result += log(i);
|
|
}
|
|
for (int16_t i = N; i >= N - n + 1; i--) {
|
|
log_result -= log(i);
|
|
}
|
|
return exp(log_result);
|
|
} else {
|
|
if (n - k == N - K) { // special case. The published recursion below would fail with a divide by zero exception
|
|
double log_result = 0.0;
|
|
for (int16_t i = k + 1; i <= n; i++) {
|
|
log_result += log(i);
|
|
}
|
|
for (int16_t i = K + 1; i <= N; i++) {
|
|
log_result -= log(i);
|
|
}
|
|
return exp(log_result);
|
|
} else { // recursion
|
|
return (p_hypergeometric(i_K, n, k - 1) * (K - k + 1) * (n - k + 1) / (k * (N - K - n + k)));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static float sum_probability(uint16_t i_K, uint16_t n, uint16_t k) {
|
|
if (k > sums[i_K]) return 0.0;
|
|
|
|
double p_T_is_k_when_S_is_K = p_hypergeometric(i_K, n, k);
|
|
double p_S_is_K = p_K[i_K];
|
|
double p_T_is_k = 0;
|
|
for (uint16_t i = 0; i < NUM_SUMS; i++) {
|
|
p_T_is_k += p_K[i] * p_hypergeometric(i, n, k);
|
|
}
|
|
return (p_T_is_k_when_S_is_K * p_S_is_K / p_T_is_k);
|
|
}
|
|
|
|
|
|
static uint32_t part_sum_count[2][NUM_PART_SUMS][NUM_PART_SUMS];
|
|
|
|
static void init_allbitflips_array(void) {
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t *bitset = all_bitflips_bitarray[odd_even] = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * (1 << 19));
|
|
if (bitset == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory in init_allbitflips_array(). Aborting...");
|
|
exit(4);
|
|
}
|
|
set_bitarray24(bitset);
|
|
all_bitflips_bitarray_dirty[odd_even] = false;
|
|
num_all_bitflips_bitarray[odd_even] = 1 << 24;
|
|
}
|
|
}
|
|
|
|
|
|
static void update_allbitflips_array(void) {
|
|
if (hardnested_stage & CHECK_2ND_BYTES) {
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
if (nonces[i].all_bitflips_dirty[odd_even]) {
|
|
uint32_t old_count = num_all_bitflips_bitarray[odd_even];
|
|
num_all_bitflips_bitarray[odd_even] = count_bitarray_low20_AND(all_bitflips_bitarray[odd_even], nonces[i].states_bitarray[odd_even]);
|
|
nonces[i].all_bitflips_dirty[odd_even] = false;
|
|
if (num_all_bitflips_bitarray[odd_even] != old_count) {
|
|
all_bitflips_bitarray_dirty[odd_even] = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static uint32_t estimated_num_states_part_sum_coarse(uint16_t part_sum_a0_idx, uint16_t part_sum_a8_idx, odd_even_t odd_even) {
|
|
return part_sum_count[odd_even][part_sum_a0_idx][part_sum_a8_idx];
|
|
}
|
|
|
|
|
|
static uint32_t estimated_num_states_part_sum(uint8_t first_byte, uint16_t part_sum_a0_idx, uint16_t part_sum_a8_idx, odd_even_t odd_even) {
|
|
if (odd_even == ODD_STATE) {
|
|
return count_bitarray_AND3(part_sum_a0_bitarrays[odd_even][part_sum_a0_idx],
|
|
part_sum_a8_bitarrays[odd_even][part_sum_a8_idx],
|
|
nonces[first_byte].states_bitarray[odd_even]);
|
|
} else {
|
|
return count_bitarray_AND4(part_sum_a0_bitarrays[odd_even][part_sum_a0_idx],
|
|
part_sum_a8_bitarrays[odd_even][part_sum_a8_idx],
|
|
nonces[first_byte].states_bitarray[odd_even],
|
|
nonces[first_byte ^ 0x80].states_bitarray[odd_even]);
|
|
}
|
|
|
|
// estimate reduction by all_bitflips_match()
|
|
// if (odd_even) {
|
|
// float p_bitflip = (float)nonces[first_byte ^ 0x80].num_states_bitarray[ODD_STATE] / num_all_bitflips_bitarray[ODD_STATE];
|
|
// return (float)count * p_bitflip; //(p_bitflip - 0.25*p_bitflip*p_bitflip);
|
|
// } else {
|
|
// return count;
|
|
// }
|
|
}
|
|
|
|
|
|
static uint64_t estimated_num_states(uint8_t first_byte, uint16_t sum_a0, uint16_t sum_a8) {
|
|
uint64_t num_states = 0;
|
|
for (uint8_t p = 0; p < NUM_PART_SUMS; p++) {
|
|
for (uint8_t q = 0; q < NUM_PART_SUMS; q++) {
|
|
if (2 * p * (16 - 2 * q) + (16 - 2 * p) * 2 * q == sum_a0) {
|
|
for (uint8_t r = 0; r < NUM_PART_SUMS; r++) {
|
|
for (uint8_t s = 0; s < NUM_PART_SUMS; s++) {
|
|
if (2 * r * (16 - 2 * s) + (16 - 2 * r) * 2 * s == sum_a8) {
|
|
num_states += (uint64_t)estimated_num_states_part_sum(first_byte, p, r, ODD_STATE)
|
|
* estimated_num_states_part_sum(first_byte, q, s, EVEN_STATE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return num_states;
|
|
}
|
|
|
|
|
|
static uint64_t estimated_num_states_coarse(uint16_t sum_a0, uint16_t sum_a8) {
|
|
uint64_t num_states = 0;
|
|
for (uint8_t p = 0; p < NUM_PART_SUMS; p++) {
|
|
for (uint8_t q = 0; q < NUM_PART_SUMS; q++) {
|
|
if (2 * p * (16 - 2 * q) + (16 - 2 * p) * 2 * q == sum_a0) {
|
|
for (uint8_t r = 0; r < NUM_PART_SUMS; r++) {
|
|
for (uint8_t s = 0; s < NUM_PART_SUMS; s++) {
|
|
if (2 * r * (16 - 2 * s) + (16 - 2 * r) * 2 * s == sum_a8) {
|
|
num_states += (uint64_t)estimated_num_states_part_sum_coarse(p, r, ODD_STATE)
|
|
* estimated_num_states_part_sum_coarse(q, s, EVEN_STATE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return num_states;
|
|
}
|
|
|
|
|
|
static void update_p_K(void) {
|
|
if (hardnested_stage & CHECK_2ND_BYTES) {
|
|
uint64_t total_count = 0;
|
|
uint16_t sum_a0 = sums[first_byte_Sum];
|
|
for (uint8_t sum_a8_idx = 0; sum_a8_idx < NUM_SUMS; sum_a8_idx++) {
|
|
uint16_t sum_a8 = sums[sum_a8_idx];
|
|
total_count += estimated_num_states_coarse(sum_a0, sum_a8);
|
|
}
|
|
for (uint8_t sum_a8_idx = 0; sum_a8_idx < NUM_SUMS; sum_a8_idx++) {
|
|
uint16_t sum_a8 = sums[sum_a8_idx];
|
|
my_p_K[sum_a8_idx] = (float)estimated_num_states_coarse(sum_a0, sum_a8) / total_count;
|
|
}
|
|
// PrintAndLogEx(NORMAL, "my_p_K = [");
|
|
// for (uint8_t sum_a8_idx = 0; sum_a8_idx < NUM_SUMS; sum_a8_idx++) {
|
|
// PrintAndLogEx(NORMAL, "%7.4f ", my_p_K[sum_a8_idx]);
|
|
// }
|
|
p_K = my_p_K;
|
|
}
|
|
}
|
|
|
|
|
|
static void update_sum_bitarrays(odd_even_t odd_even) {
|
|
if (all_bitflips_bitarray_dirty[odd_even]) {
|
|
for (uint8_t part_sum = 0; part_sum < NUM_PART_SUMS; part_sum++) {
|
|
bitarray_AND(part_sum_a0_bitarrays[odd_even][part_sum], all_bitflips_bitarray[odd_even]);
|
|
bitarray_AND(part_sum_a8_bitarrays[odd_even][part_sum], all_bitflips_bitarray[odd_even]);
|
|
}
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
nonces[i].num_states_bitarray[odd_even] = count_bitarray_AND(nonces[i].states_bitarray[odd_even], all_bitflips_bitarray[odd_even]);
|
|
}
|
|
for (uint8_t part_sum_a0 = 0; part_sum_a0 < NUM_PART_SUMS; part_sum_a0++) {
|
|
for (uint8_t part_sum_a8 = 0; part_sum_a8 < NUM_PART_SUMS; part_sum_a8++) {
|
|
part_sum_count[odd_even][part_sum_a0][part_sum_a8]
|
|
+= count_bitarray_AND2(part_sum_a0_bitarrays[odd_even][part_sum_a0], part_sum_a8_bitarrays[odd_even][part_sum_a8]);
|
|
}
|
|
}
|
|
all_bitflips_bitarray_dirty[odd_even] = false;
|
|
}
|
|
}
|
|
|
|
|
|
static int compare_expected_num_brute_force(const void *b1, const void *b2) {
|
|
uint8_t index1 = *(uint8_t *)b1;
|
|
uint8_t index2 = *(uint8_t *)b2;
|
|
float score1 = nonces[index1].expected_num_brute_force;
|
|
float score2 = nonces[index2].expected_num_brute_force;
|
|
return (score1 > score2) - (score1 < score2);
|
|
}
|
|
|
|
|
|
static int compare_sum_a8_guess(const void *b1, const void *b2) {
|
|
float prob1 = ((guess_sum_a8_t *)b1)->prob;
|
|
float prob2 = ((guess_sum_a8_t *)b2)->prob;
|
|
return (prob1 < prob2) - (prob1 > prob2);
|
|
|
|
}
|
|
|
|
|
|
static float check_smallest_bitflip_bitarrays(void) {
|
|
uint32_t num_odd, num_even;
|
|
uint64_t smallest = 1LL << 48;
|
|
// initialize best_first_bytes, do a rough estimation on remaining states
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
num_odd = nonces[i].num_states_bitarray[ODD_STATE];
|
|
num_even = nonces[i].num_states_bitarray[EVEN_STATE]; // * (float)nonces[i^0x80].num_states_bitarray[EVEN_STATE] / num_all_bitflips_bitarray[EVEN_STATE];
|
|
if ((uint64_t)num_odd * num_even < smallest) {
|
|
smallest = (uint64_t)num_odd * num_even;
|
|
best_first_byte_smallest_bitarray = i;
|
|
}
|
|
}
|
|
|
|
#if defined (DEBUG_REDUCTION)
|
|
num_odd = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[ODD_STATE];
|
|
num_even = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[EVEN_STATE]; // * (float)nonces[best_first_byte_smallest_bitarray^0x80].num_states_bitarray[EVEN_STATE] / num_all_bitflips_bitarray[EVEN_STATE];
|
|
PrintAndLogEx(NORMAL, "0x%02x: %8d * %8d = %12" PRIu64 " (2^%1.1f)\n", best_first_byte_smallest_bitarray, num_odd, num_even, (uint64_t)num_odd * num_even, log((uint64_t)num_odd * num_even) / log(2.0));
|
|
#endif
|
|
return (float)smallest / 2.0;
|
|
}
|
|
|
|
|
|
static void update_expected_brute_force(uint8_t best_byte) {
|
|
|
|
float total_prob = 0.0;
|
|
for (uint8_t i = 0; i < NUM_SUMS; i++) {
|
|
total_prob += nonces[best_byte].sum_a8_guess[i].prob;
|
|
}
|
|
// linear adjust probabilities to result in total_prob = 1.0;
|
|
for (uint8_t i = 0; i < NUM_SUMS; i++) {
|
|
nonces[best_byte].sum_a8_guess[i].prob /= total_prob;
|
|
}
|
|
float prob_all_failed = 1.0;
|
|
nonces[best_byte].expected_num_brute_force = 0.0;
|
|
for (uint8_t i = 0; i < NUM_SUMS; i++) {
|
|
nonces[best_byte].expected_num_brute_force += nonces[best_byte].sum_a8_guess[i].prob * (float)nonces[best_byte].sum_a8_guess[i].num_states / 2.0;
|
|
prob_all_failed -= nonces[best_byte].sum_a8_guess[i].prob;
|
|
nonces[best_byte].expected_num_brute_force += prob_all_failed * (float)nonces[best_byte].sum_a8_guess[i].num_states / 2.0;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static float sort_best_first_bytes(void) {
|
|
|
|
// initialize best_first_bytes, do a rough estimation on remaining states for each Sum_a8 property
|
|
// and the expected number of states to brute force
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
best_first_bytes[i] = i;
|
|
float prob_all_failed = 1.0;
|
|
nonces[i].expected_num_brute_force = 0.0;
|
|
for (uint8_t j = 0; j < NUM_SUMS; j++) {
|
|
nonces[i].sum_a8_guess[j].num_states = estimated_num_states_coarse(sums[first_byte_Sum], sums[nonces[i].sum_a8_guess[j].sum_a8_idx]);
|
|
nonces[i].expected_num_brute_force += nonces[i].sum_a8_guess[j].prob * (float)nonces[i].sum_a8_guess[j].num_states / 2.0;
|
|
prob_all_failed -= nonces[i].sum_a8_guess[j].prob;
|
|
nonces[i].expected_num_brute_force += prob_all_failed * (float)nonces[i].sum_a8_guess[j].num_states / 2.0;
|
|
}
|
|
}
|
|
|
|
// sort based on expected number of states to brute force
|
|
qsort(best_first_bytes, 256, 1, compare_expected_num_brute_force);
|
|
|
|
// PrintAndLogEx(NORMAL, "refine estimations: ");
|
|
#define NUM_REFINES 1
|
|
// refine scores for the best:
|
|
for (uint16_t i = 0; i < NUM_REFINES; i++) {
|
|
// PrintAndLogEx(NORMAL, "%d...", i);
|
|
uint16_t first_byte = best_first_bytes[i];
|
|
for (uint8_t j = 0; j < NUM_SUMS && nonces[first_byte].sum_a8_guess[j].prob > 0.05; j++) {
|
|
nonces[first_byte].sum_a8_guess[j].num_states = estimated_num_states(first_byte, sums[first_byte_Sum], sums[nonces[first_byte].sum_a8_guess[j].sum_a8_idx]);
|
|
}
|
|
// while (nonces[first_byte].sum_a8_guess[0].num_states == 0
|
|
// || nonces[first_byte].sum_a8_guess[1].num_states == 0
|
|
// || nonces[first_byte].sum_a8_guess[2].num_states == 0) {
|
|
// if (nonces[first_byte].sum_a8_guess[0].num_states == 0) {
|
|
// nonces[first_byte].sum_a8_guess[0].prob = 0.0;
|
|
// PrintAndLogEx(NORMAL, "(0x%02x,%d)", first_byte, 0);
|
|
// }
|
|
// if (nonces[first_byte].sum_a8_guess[1].num_states == 0) {
|
|
// nonces[first_byte].sum_a8_guess[1].prob = 0.0;
|
|
// PrintAndLogEx(NORMAL, "(0x%02x,%d)", first_byte, 1);
|
|
// }
|
|
// if (nonces[first_byte].sum_a8_guess[2].num_states == 0) {
|
|
// nonces[first_byte].sum_a8_guess[2].prob = 0.0;
|
|
// PrintAndLogEx(NORMAL, "(0x%02x,%d)", first_byte, 2);
|
|
// }
|
|
// PrintAndLogEx(NORMAL, "|");
|
|
// qsort(nonces[first_byte].sum_a8_guess, NUM_SUMS, sizeof(guess_sum_a8_t), compare_sum_a8_guess);
|
|
// for (uint8_t j = 0; j < NUM_SUMS && nonces[first_byte].sum_a8_guess[j].prob > 0.05; j++) {
|
|
// nonces[first_byte].sum_a8_guess[j].num_states = estimated_num_states(first_byte, sums[first_byte_Sum], sums[nonces[first_byte].sum_a8_guess[j].sum_a8_idx]);
|
|
// }
|
|
// }
|
|
// float fix_probs = 0.0;
|
|
// for (uint8_t j = 0; j < NUM_SUMS; j++) {
|
|
// fix_probs += nonces[first_byte].sum_a8_guess[j].prob;
|
|
// }
|
|
// for (uint8_t j = 0; j < NUM_SUMS; j++) {
|
|
// nonces[first_byte].sum_a8_guess[j].prob /= fix_probs;
|
|
// }
|
|
// for (uint8_t j = 0; j < NUM_SUMS && nonces[first_byte].sum_a8_guess[j].prob > 0.05; j++) {
|
|
// nonces[first_byte].sum_a8_guess[j].num_states = estimated_num_states(first_byte, sums[first_byte_Sum], sums[nonces[first_byte].sum_a8_guess[j].sum_a8_idx]);
|
|
// }
|
|
float prob_all_failed = 1.0;
|
|
nonces[first_byte].expected_num_brute_force = 0.0;
|
|
for (uint8_t j = 0; j < NUM_SUMS; j++) {
|
|
nonces[first_byte].expected_num_brute_force += nonces[first_byte].sum_a8_guess[j].prob * (float)nonces[first_byte].sum_a8_guess[j].num_states / 2.0;
|
|
prob_all_failed -= nonces[first_byte].sum_a8_guess[j].prob;
|
|
nonces[first_byte].expected_num_brute_force += prob_all_failed * (float)nonces[first_byte].sum_a8_guess[j].num_states / 2.0;
|
|
}
|
|
}
|
|
|
|
// copy best byte to front:
|
|
float least_expected_brute_force = (1LL << 48);
|
|
uint8_t best_byte = 0;
|
|
for (uint16_t i = 0; i < 10; i++) {
|
|
uint16_t first_byte = best_first_bytes[i];
|
|
if (nonces[first_byte].expected_num_brute_force < least_expected_brute_force) {
|
|
least_expected_brute_force = nonces[first_byte].expected_num_brute_force;
|
|
best_byte = i;
|
|
}
|
|
}
|
|
if (best_byte != 0) {
|
|
// PrintAndLogEx(NORMAL, "0x%02x <-> 0x%02x", best_first_bytes[0], best_first_bytes[best_byte]);
|
|
uint8_t tmp = best_first_bytes[0];
|
|
best_first_bytes[0] = best_first_bytes[best_byte];
|
|
best_first_bytes[best_byte] = tmp;
|
|
}
|
|
|
|
return nonces[best_first_bytes[0]].expected_num_brute_force;
|
|
}
|
|
|
|
|
|
static float update_reduction_rate(float last, bool init) {
|
|
#define QUEUE_LEN 4
|
|
static float queue[QUEUE_LEN];
|
|
|
|
for (uint16_t i = 0; i < QUEUE_LEN - 1; i++) {
|
|
if (init) {
|
|
queue[i] = (float)(1LL << 48);
|
|
} else {
|
|
queue[i] = queue[i + 1];
|
|
}
|
|
}
|
|
if (init) {
|
|
queue[QUEUE_LEN - 1] = (float)(1LL << 48);
|
|
} else {
|
|
queue[QUEUE_LEN - 1] = last;
|
|
}
|
|
|
|
// linear regression
|
|
float avg_y = 0.0;
|
|
float avg_x = 0.0;
|
|
for (uint16_t i = 0; i < QUEUE_LEN; i++) {
|
|
avg_x += i;
|
|
avg_y += queue[i];
|
|
}
|
|
avg_x /= QUEUE_LEN;
|
|
avg_y /= QUEUE_LEN;
|
|
|
|
float dev_xy = 0.0;
|
|
float dev_x2 = 0.0;
|
|
for (uint16_t i = 0; i < QUEUE_LEN; i++) {
|
|
dev_xy += (i - avg_x) * (queue[i] - avg_y);
|
|
dev_x2 += (i - avg_x) * (i - avg_x);
|
|
}
|
|
|
|
float reduction_rate = -1.0 * dev_xy / dev_x2; // the negative slope of the linear regression
|
|
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "update_reduction_rate(%1.0f) = %1.0f per sample, brute_force_per_sample = %1.0f\n", last, reduction_rate, brute_force_per_second * (float)sample_period / 1000.0);
|
|
#endif
|
|
return reduction_rate;
|
|
}
|
|
|
|
|
|
static bool shrink_key_space(float *brute_forces) {
|
|
#if defined(DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "shrink_key_space() with stage = 0x%02x\n", hardnested_stage);
|
|
#endif
|
|
float brute_forces1 = check_smallest_bitflip_bitarrays();
|
|
float brute_forces2 = (float)(1LL << 47);
|
|
if (hardnested_stage & CHECK_2ND_BYTES) {
|
|
brute_forces2 = sort_best_first_bytes();
|
|
}
|
|
*brute_forces = MIN(brute_forces1, brute_forces2);
|
|
float reduction_rate = update_reduction_rate(*brute_forces, false);
|
|
|
|
//iceman 2018
|
|
return ((hardnested_stage & CHECK_2ND_BYTES) &&
|
|
reduction_rate >= 0.0 &&
|
|
(reduction_rate < brute_force_per_second * (float)sample_period / 1000.0 || *brute_forces < 0xF00000));
|
|
|
|
}
|
|
|
|
|
|
static void estimate_sum_a8(void) {
|
|
if (first_byte_num == 256) {
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
if (nonces[i].sum_a8_guess_dirty) {
|
|
for (uint16_t j = 0; j < NUM_SUMS; j++) {
|
|
uint16_t sum_a8_idx = nonces[i].sum_a8_guess[j].sum_a8_idx;
|
|
nonces[i].sum_a8_guess[j].prob = sum_probability(sum_a8_idx, nonces[i].num, nonces[i].Sum);
|
|
}
|
|
qsort(nonces[i].sum_a8_guess, NUM_SUMS, sizeof(guess_sum_a8_t), compare_sum_a8_guess);
|
|
nonces[i].sum_a8_guess_dirty = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int read_nonce_file(char *filename) {
|
|
FILE *fnonces = NULL;
|
|
char progress_text[80] = "";
|
|
size_t bytes_read;
|
|
uint8_t trgBlockNo;
|
|
uint8_t trgKeyType;
|
|
uint8_t read_buf[9];
|
|
uint32_t nt_enc1, nt_enc2;
|
|
uint8_t par_enc;
|
|
|
|
num_acquired_nonces = 0;
|
|
if ((fnonces = fopen(filename, "rb")) == NULL) {
|
|
PrintAndLogEx(WARNING, "Could not open file %s", filename);
|
|
return 1;
|
|
}
|
|
snprintf(progress_text, 80, "Reading nonces from file %s...", filename);
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
bytes_read = fread(read_buf, 1, 6, fnonces);
|
|
if (bytes_read != 6) {
|
|
PrintAndLogEx(WARNING, "File reading error.");
|
|
fclose(fnonces);
|
|
return 1;
|
|
}
|
|
cuid = bytes_to_num(read_buf, 4);
|
|
trgBlockNo = bytes_to_num(read_buf + 4, 1);
|
|
trgKeyType = bytes_to_num(read_buf + 5, 1);
|
|
|
|
bytes_read = fread(read_buf, 1, 9, fnonces);
|
|
while (bytes_read == 9) {
|
|
nt_enc1 = bytes_to_num(read_buf, 4);
|
|
nt_enc2 = bytes_to_num(read_buf + 4, 4);
|
|
par_enc = bytes_to_num(read_buf + 8, 1);
|
|
add_nonce(nt_enc1, par_enc >> 4);
|
|
add_nonce(nt_enc2, par_enc & 0x0f);
|
|
num_acquired_nonces += 2;
|
|
bytes_read = fread(read_buf, 1, 9, fnonces);
|
|
}
|
|
fclose(fnonces);
|
|
|
|
char progress_string[80];
|
|
sprintf(progress_string, "Read %u nonces from file. cuid = %08x", num_acquired_nonces, cuid);
|
|
hardnested_print_progress(num_acquired_nonces, progress_string, (float)(1LL << 47), 0);
|
|
sprintf(progress_string, "Target Block=%d, Keytype=%c", trgBlockNo, trgKeyType == 0 ? 'A' : 'B');
|
|
hardnested_print_progress(num_acquired_nonces, progress_string, (float)(1LL << 47), 0);
|
|
|
|
for (uint16_t i = 0; i < NUM_SUMS; i++) {
|
|
if (first_byte_Sum == sums[i]) {
|
|
first_byte_Sum = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
noncelistentry_t *SearchFor2ndByte(uint8_t b1, uint8_t b2) {
|
|
noncelistentry_t *p = nonces[b1].first;
|
|
while (p != NULL) {
|
|
if ((p->nonce_enc >> 16 & 0xff) == b2) {
|
|
return p;
|
|
}
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static bool timeout(void) {
|
|
return (msclock() > last_sample_clock + sample_period);
|
|
}
|
|
|
|
|
|
static void
|
|
#ifdef __has_attribute
|
|
#if __has_attribute(force_align_arg_pointer)
|
|
__attribute__((force_align_arg_pointer))
|
|
#endif
|
|
#endif
|
|
*check_for_BitFlipProperties_thread(void *args) {
|
|
uint8_t first_byte = ((uint8_t *)args)[0];
|
|
uint8_t last_byte = ((uint8_t *)args)[1];
|
|
uint8_t time_budget = ((uint8_t *)args)[2];
|
|
|
|
if (hardnested_stage & CHECK_1ST_BYTES) {
|
|
// for (uint16_t bitflip = 0x001; bitflip < 0x200; bitflip++) {
|
|
for (uint16_t bitflip_idx = 0; bitflip_idx < num_1st_byte_effective_bitflips; bitflip_idx++) {
|
|
uint16_t bitflip = all_effective_bitflip[bitflip_idx];
|
|
if (time_budget & timeout()) {
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "break at bitflip_idx %d...", bitflip_idx);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
for (uint16_t i = first_byte; i <= last_byte; i++) {
|
|
if (nonces[i].BitFlips[bitflip] == 0 && nonces[i].BitFlips[bitflip ^ 0x100] == 0
|
|
&& nonces[i].first != NULL && nonces[i ^ (bitflip & 0xff)].first != NULL) {
|
|
uint8_t parity1 = (nonces[i].first->par_enc) >> 3; // parity of first byte
|
|
uint8_t parity2 = (nonces[i ^ (bitflip & 0xff)].first->par_enc) >> 3; // parity of nonce with bits flipped
|
|
if ((parity1 == parity2 && !(bitflip & 0x100)) // bitflip
|
|
|| (parity1 != parity2 && (bitflip & 0x100))) { // not bitflip
|
|
nonces[i].BitFlips[bitflip] = 1;
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
if (bitflip_bitarrays[odd_even][bitflip] != NULL) {
|
|
uint32_t old_count = nonces[i].num_states_bitarray[odd_even];
|
|
nonces[i].num_states_bitarray[odd_even] = count_bitarray_AND(nonces[i].states_bitarray[odd_even], bitflip_bitarrays[odd_even][bitflip]);
|
|
if (nonces[i].num_states_bitarray[odd_even] != old_count) {
|
|
nonces[i].all_bitflips_dirty[odd_even] = true;
|
|
}
|
|
// PrintAndLogEx(NORMAL, "bitflip: %d old: %d, new: %d ", bitflip, old_count, nonces[i].num_states_bitarray[odd_even]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
((uint8_t *)args)[1] = num_1st_byte_effective_bitflips - bitflip_idx - 1; // bitflips still to go in stage 1
|
|
}
|
|
}
|
|
|
|
((uint8_t *)args)[1] = 0; // stage 1 definitely completed
|
|
|
|
if (hardnested_stage & CHECK_2ND_BYTES) {
|
|
for (uint16_t bitflip_idx = num_1st_byte_effective_bitflips; bitflip_idx < num_all_effective_bitflips; bitflip_idx++) {
|
|
uint16_t bitflip = all_effective_bitflip[bitflip_idx];
|
|
if (time_budget & timeout()) {
|
|
#if defined (DEBUG_REDUCTION)
|
|
PrintAndLogEx(NORMAL, "break at bitflip_idx %d...", bitflip_idx);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
for (uint16_t i = first_byte; i <= last_byte; i++) {
|
|
// Check for Bit Flip Property of 2nd bytes
|
|
if (nonces[i].BitFlips[bitflip] == 0) {
|
|
for (uint16_t j = 0; j < 256; j++) { // for each 2nd Byte
|
|
noncelistentry_t *byte1 = SearchFor2ndByte(i, j);
|
|
noncelistentry_t *byte2 = SearchFor2ndByte(i, j ^ (bitflip & 0xff));
|
|
if (byte1 != NULL && byte2 != NULL) {
|
|
uint8_t parity1 = byte1->par_enc >> 2 & 0x01; // parity of 2nd byte
|
|
uint8_t parity2 = byte2->par_enc >> 2 & 0x01; // parity of 2nd byte with bits flipped
|
|
if ((parity1 == parity2 && !(bitflip & 0x100)) // bitflip
|
|
|| (parity1 != parity2 && (bitflip & 0x100))) { // not bitflip
|
|
nonces[i].BitFlips[bitflip] = 1;
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
if (bitflip_bitarrays[odd_even][bitflip] != NULL) {
|
|
uint32_t old_count = nonces[i].num_states_bitarray[odd_even];
|
|
nonces[i].num_states_bitarray[odd_even] = count_bitarray_AND(nonces[i].states_bitarray[odd_even], bitflip_bitarrays[odd_even][bitflip]);
|
|
if (nonces[i].num_states_bitarray[odd_even] != old_count) {
|
|
nonces[i].all_bitflips_dirty[odd_even] = true;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// PrintAndLogEx(NORMAL, "states_bitarray[0][%" PRIu16 "] contains %d ones.\n", i, count_states(nonces[i].states_bitarray[EVEN_STATE]));
|
|
// PrintAndLogEx(NORMAL, "states_bitarray[1][%" PRIu16 "] contains %d ones.\n", i, count_states(nonces[i].states_bitarray[ODD_STATE]));
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void check_for_BitFlipProperties(bool time_budget) {
|
|
// create and run worker threads
|
|
pthread_t thread_id[NUM_CHECK_BITFLIPS_THREADS];
|
|
|
|
uint8_t args[NUM_CHECK_BITFLIPS_THREADS][3];
|
|
uint16_t bytes_per_thread = (256 + (NUM_CHECK_BITFLIPS_THREADS / 2)) / NUM_CHECK_BITFLIPS_THREADS;
|
|
for (uint8_t i = 0; i < NUM_CHECK_BITFLIPS_THREADS; i++) {
|
|
args[i][0] = i * bytes_per_thread;
|
|
args[i][1] = MIN(args[i][0] + bytes_per_thread - 1, 255);
|
|
args[i][2] = time_budget;
|
|
}
|
|
args[NUM_CHECK_BITFLIPS_THREADS - 1][1] = MAX(args[NUM_CHECK_BITFLIPS_THREADS - 1][1], 255);
|
|
|
|
// start threads
|
|
for (uint8_t i = 0; i < NUM_CHECK_BITFLIPS_THREADS; i++) {
|
|
pthread_create(&thread_id[i], NULL, check_for_BitFlipProperties_thread, args[i]);
|
|
}
|
|
|
|
// wait for threads to terminate:
|
|
for (uint8_t i = 0; i < NUM_CHECK_BITFLIPS_THREADS; i++) {
|
|
pthread_join(thread_id[i], NULL);
|
|
}
|
|
|
|
if (hardnested_stage & CHECK_2ND_BYTES) {
|
|
hardnested_stage &= ~CHECK_1ST_BYTES; // we are done with 1st stage, except...
|
|
for (uint16_t i = 0; i < NUM_CHECK_BITFLIPS_THREADS; i++) {
|
|
if (args[i][1] != 0) {
|
|
hardnested_stage |= CHECK_1ST_BYTES; // ... when any of the threads didn't complete in time
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#if defined (DEBUG_REDUCTION)
|
|
if (hardnested_stage & CHECK_1ST_BYTES) PrintAndLogEx(NORMAL, "stage 1 not completed yet\n");
|
|
#endif
|
|
}
|
|
|
|
|
|
static void update_nonce_data(bool time_budget) {
|
|
check_for_BitFlipProperties(time_budget);
|
|
update_allbitflips_array();
|
|
update_sum_bitarrays(EVEN_STATE);
|
|
update_sum_bitarrays(ODD_STATE);
|
|
update_p_K();
|
|
estimate_sum_a8();
|
|
}
|
|
|
|
|
|
static void apply_sum_a0(void) {
|
|
uint32_t old_count = num_all_bitflips_bitarray[EVEN_STATE];
|
|
num_all_bitflips_bitarray[EVEN_STATE] = count_bitarray_AND(all_bitflips_bitarray[EVEN_STATE], sum_a0_bitarrays[EVEN_STATE][first_byte_Sum]);
|
|
if (num_all_bitflips_bitarray[EVEN_STATE] != old_count) {
|
|
all_bitflips_bitarray_dirty[EVEN_STATE] = true;
|
|
}
|
|
old_count = num_all_bitflips_bitarray[ODD_STATE];
|
|
num_all_bitflips_bitarray[ODD_STATE] = count_bitarray_AND(all_bitflips_bitarray[ODD_STATE], sum_a0_bitarrays[ODD_STATE][first_byte_Sum]);
|
|
if (num_all_bitflips_bitarray[ODD_STATE] != old_count) {
|
|
all_bitflips_bitarray_dirty[ODD_STATE] = true;
|
|
}
|
|
}
|
|
|
|
|
|
static void simulate_MFplus_RNG(uint32_t test_cuid, uint64_t test_key, uint32_t *nt_enc, uint8_t *par_enc) {
|
|
struct Crypto1State sim_cs = {0, 0};
|
|
|
|
// init cryptostate with key:
|
|
for (int8_t i = 47; i > 0; i -= 2) {
|
|
sim_cs.odd = sim_cs.odd << 1 | BIT(test_key, (i - 1) ^ 7);
|
|
sim_cs.even = sim_cs.even << 1 | BIT(test_key, i ^ 7);
|
|
}
|
|
|
|
*par_enc = 0;
|
|
uint32_t nt = (rand() & 0xff) << 24 | (rand() & 0xff) << 16 | (rand() & 0xff) << 8 | (rand() & 0xff);
|
|
for (int8_t byte_pos = 3; byte_pos >= 0; byte_pos--) {
|
|
uint8_t nt_byte_dec = (nt >> (8 * byte_pos)) & 0xff;
|
|
uint8_t nt_byte_enc = crypto1_byte(&sim_cs, nt_byte_dec ^ (test_cuid >> (8 * byte_pos)), false) ^ nt_byte_dec; // encode the nonce byte
|
|
*nt_enc = (*nt_enc << 8) | nt_byte_enc;
|
|
uint8_t ks_par = filter(sim_cs.odd); // the keystream bit to encode/decode the parity bit
|
|
uint8_t nt_byte_par_enc = ks_par ^ oddparity8(nt_byte_dec); // determine the nt byte's parity and encode it
|
|
*par_enc = (*par_enc << 1) | nt_byte_par_enc;
|
|
}
|
|
|
|
}
|
|
|
|
static void simulate_acquire_nonces() {
|
|
time_t time1 = time(NULL);
|
|
last_sample_clock = 0;
|
|
sample_period = 1000; // for simulation
|
|
hardnested_stage = CHECK_1ST_BYTES;
|
|
bool acquisition_completed = false;
|
|
uint32_t total_num_nonces = 0;
|
|
float brute_force_depth;
|
|
bool reported_suma8 = false;
|
|
|
|
cuid = (rand() & 0xff) << 24 | (rand() & 0xff) << 16 | (rand() & 0xff) << 8 | (rand() & 0xff);
|
|
if (known_target_key == -1) {
|
|
known_target_key = ((uint64_t)rand() & 0xfff) << 36 | ((uint64_t)rand() & 0xfff) << 24 | ((uint64_t)rand() & 0xfff) << 12 | ((uint64_t)rand() & 0xfff);
|
|
}
|
|
|
|
char progress_text[80];
|
|
sprintf(progress_text, "Simulating key %012" PRIx64 ", cuid %08" PRIx32 " ...", known_target_key, cuid);
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
fprintf(fstats, "%012" PRIx64 ";%" PRIx32 ";", known_target_key, cuid);
|
|
|
|
num_acquired_nonces = 0;
|
|
|
|
do {
|
|
uint32_t nt_enc = 0;
|
|
uint8_t par_enc = 0;
|
|
|
|
for (uint16_t i = 0; i < 113; i++) {
|
|
simulate_MFplus_RNG(cuid, known_target_key, &nt_enc, &par_enc);
|
|
num_acquired_nonces += add_nonce(nt_enc, par_enc);
|
|
total_num_nonces++;
|
|
}
|
|
|
|
last_sample_clock = msclock();
|
|
|
|
if (first_byte_num == 256) {
|
|
if (hardnested_stage == CHECK_1ST_BYTES) {
|
|
for (uint16_t i = 0; i < NUM_SUMS; i++) {
|
|
if (first_byte_Sum == sums[i]) {
|
|
first_byte_Sum = i;
|
|
break;
|
|
}
|
|
}
|
|
hardnested_stage |= CHECK_2ND_BYTES;
|
|
apply_sum_a0();
|
|
}
|
|
update_nonce_data(true);
|
|
acquisition_completed = shrink_key_space(&brute_force_depth);
|
|
if (!reported_suma8) {
|
|
char progress_string[80];
|
|
sprintf(progress_string, "Apply Sum property. Sum(a0) = %d", sums[first_byte_Sum]);
|
|
hardnested_print_progress(num_acquired_nonces, progress_string, brute_force_depth, 0);
|
|
reported_suma8 = true;
|
|
} else {
|
|
hardnested_print_progress(num_acquired_nonces, "Apply bit flip properties", brute_force_depth, 0);
|
|
}
|
|
} else {
|
|
update_nonce_data(true);
|
|
acquisition_completed = shrink_key_space(&brute_force_depth);
|
|
hardnested_print_progress(num_acquired_nonces, "Apply bit flip properties", brute_force_depth, 0);
|
|
}
|
|
} while (!acquisition_completed);
|
|
|
|
time_t end_time = time(NULL);
|
|
// PrintAndLogEx(NORMAL, "Acquired a total of %" PRId32" nonces in %1.0f seconds (%1.0f nonces/minute)",
|
|
// num_acquired_nonces,
|
|
// difftime(end_time, time1),
|
|
// difftime(end_time, time1)!=0.0?(float)total_num_nonces*60.0/difftime(end_time, time1):INFINITY
|
|
// );
|
|
|
|
fprintf(fstats, "%" PRIu32 ";%" PRIu32 ";%1.0f;", total_num_nonces, num_acquired_nonces, difftime(end_time, time1));
|
|
|
|
}
|
|
|
|
|
|
static int acquire_nonces(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, bool nonce_file_write, bool slow, char *filename) {
|
|
last_sample_clock = msclock();
|
|
sample_period = 2000; // initial rough estimate. Will be refined.
|
|
bool initialize = true;
|
|
bool field_off = false;
|
|
hardnested_stage = CHECK_1ST_BYTES;
|
|
bool acquisition_completed = false;
|
|
uint8_t write_buf[9];
|
|
//uint32_t total_num_nonces = 0;
|
|
float brute_force_depth;
|
|
bool reported_suma8 = false;
|
|
char progress_text[80];
|
|
FILE *fnonces = NULL;
|
|
UsbCommand resp;
|
|
|
|
num_acquired_nonces = 0;
|
|
|
|
clearCommandBuffer();
|
|
|
|
do {
|
|
uint32_t flags = 0;
|
|
flags |= initialize ? 0x0001 : 0;
|
|
flags |= slow ? 0x0002 : 0;
|
|
flags |= field_off ? 0x0004 : 0;
|
|
UsbCommand c = {CMD_MIFARE_ACQUIRE_ENCRYPTED_NONCES, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, flags}, {{0}}};
|
|
memcpy(c.d.asBytes, key, 6);
|
|
|
|
clearCommandBuffer();
|
|
SendCommand(&c);
|
|
|
|
if (field_off) break;
|
|
|
|
if (initialize) {
|
|
if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
|
|
//strange second call (iceman)
|
|
UsbCommand c1 = {CMD_MIFARE_ACQUIRE_ENCRYPTED_NONCES, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, 4}, {{0}}};
|
|
clearCommandBuffer();
|
|
SendCommand(&c1);
|
|
return 1;
|
|
}
|
|
if (resp.arg[0]) return resp.arg[0]; // error during nested_hard
|
|
|
|
cuid = resp.arg[1];
|
|
if (nonce_file_write && fnonces == NULL) {
|
|
if ((fnonces = fopen(filename, "wb")) == NULL) {
|
|
PrintAndLogEx(WARNING, "Could not create file %s", filename);
|
|
return 3;
|
|
}
|
|
snprintf(progress_text, 80, "Writing acquired nonces to binary file %s", filename);
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
num_to_bytes(cuid, 4, write_buf);
|
|
fwrite(write_buf, 1, 4, fnonces);
|
|
fwrite(&trgBlockNo, 1, 1, fnonces);
|
|
fwrite(&trgKeyType, 1, 1, fnonces);
|
|
fflush(fnonces);
|
|
}
|
|
}
|
|
|
|
if (!initialize) {
|
|
uint32_t nt_enc1, nt_enc2;
|
|
uint8_t par_enc;
|
|
uint16_t num_sampled_nonces = resp.arg[2];
|
|
uint8_t *bufp = resp.d.asBytes;
|
|
for (uint16_t i = 0; i < num_sampled_nonces; i += 2) {
|
|
nt_enc1 = bytes_to_num(bufp, 4);
|
|
nt_enc2 = bytes_to_num(bufp + 4, 4);
|
|
par_enc = bytes_to_num(bufp + 8, 1);
|
|
|
|
//PrintAndLogEx(NORMAL, "Encrypted nonce: %08x, encrypted_parity: %02x\n", nt_enc1, par_enc >> 4);
|
|
num_acquired_nonces += add_nonce(nt_enc1, par_enc >> 4);
|
|
//PrintAndLogEx(NORMAL, "Encrypted nonce: %08x, encrypted_parity: %02x\n", nt_enc2, par_enc & 0x0f);
|
|
num_acquired_nonces += add_nonce(nt_enc2, par_enc & 0x0f);
|
|
|
|
if (nonce_file_write) {
|
|
fwrite(bufp, 1, 9, fnonces);
|
|
fflush(fnonces);
|
|
}
|
|
bufp += 9;
|
|
}
|
|
//total_num_nonces += num_sampled_nonces;
|
|
|
|
if (first_byte_num == 256) {
|
|
if (hardnested_stage == CHECK_1ST_BYTES) {
|
|
for (uint16_t i = 0; i < NUM_SUMS; i++) {
|
|
if (first_byte_Sum == sums[i]) {
|
|
first_byte_Sum = i;
|
|
break;
|
|
}
|
|
}
|
|
hardnested_stage |= CHECK_2ND_BYTES;
|
|
apply_sum_a0();
|
|
}
|
|
update_nonce_data(true);
|
|
acquisition_completed = shrink_key_space(&brute_force_depth);
|
|
if (!reported_suma8) {
|
|
char progress_string[80];
|
|
sprintf(progress_string, "Apply Sum property. Sum(a0) = %d", sums[first_byte_Sum]);
|
|
hardnested_print_progress(num_acquired_nonces, progress_string, brute_force_depth, 0);
|
|
reported_suma8 = true;
|
|
} else {
|
|
hardnested_print_progress(num_acquired_nonces, "Apply bit flip properties", brute_force_depth, 0);
|
|
}
|
|
} else {
|
|
update_nonce_data(true);
|
|
acquisition_completed = shrink_key_space(&brute_force_depth);
|
|
hardnested_print_progress(num_acquired_nonces, "Apply bit flip properties", brute_force_depth, 0);
|
|
}
|
|
}
|
|
|
|
if (acquisition_completed) {
|
|
field_off = true; // switch off field with next SendCommand and then finish
|
|
}
|
|
|
|
if (!initialize) {
|
|
if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
|
|
if (nonce_file_write) {
|
|
fclose(fnonces);
|
|
}
|
|
return 1;
|
|
}
|
|
if (resp.arg[0]) {
|
|
if (nonce_file_write) {
|
|
fclose(fnonces);
|
|
}
|
|
return resp.arg[0]; // error during nested_hard
|
|
}
|
|
}
|
|
|
|
initialize = false;
|
|
|
|
if (msclock() - last_sample_clock < sample_period) {
|
|
sample_period = msclock() - last_sample_clock;
|
|
}
|
|
last_sample_clock = msclock();
|
|
|
|
} while (!acquisition_completed || field_off);
|
|
|
|
if (nonce_file_write) {
|
|
fclose(fnonces);
|
|
}
|
|
|
|
// PrintAndLogEx(NORMAL, "Sampled a total of %d nonces in %d seconds (%0.0f nonces/minute)",
|
|
// total_num_nonces,
|
|
// time(NULL)-time1,
|
|
// (float)total_num_nonces*60.0/(time(NULL)-time1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline bool invariant_holds(uint_fast8_t byte_diff, uint_fast32_t state1, uint_fast32_t state2, uint_fast8_t bit, uint_fast8_t state_bit) {
|
|
uint_fast8_t j_1_bit_mask = 0x01 << (bit - 1);
|
|
uint_fast8_t bit_diff = byte_diff & j_1_bit_mask; // difference of (j-1)th bit
|
|
uint_fast8_t filter_diff = filter(state1 >> (4 - state_bit)) ^ filter(state2 >> (4 - state_bit)); // difference in filter function
|
|
uint_fast8_t mask_y12_y13 = 0xc0 >> state_bit;
|
|
uint_fast8_t state_bits_diff = (state1 ^ state2) & mask_y12_y13; // difference in state bits 12 and 13
|
|
uint_fast8_t all_diff = evenparity8(bit_diff ^ state_bits_diff ^ filter_diff); // use parity function to XOR all bits
|
|
return !all_diff;
|
|
}
|
|
|
|
|
|
static inline bool invalid_state(uint_fast8_t byte_diff, uint_fast32_t state1, uint_fast32_t state2, uint_fast8_t bit, uint_fast8_t state_bit) {
|
|
uint_fast8_t j_bit_mask = 0x01 << bit;
|
|
uint_fast8_t bit_diff = byte_diff & j_bit_mask; // difference of jth bit
|
|
uint_fast8_t mask_y13_y16 = 0x48 >> state_bit;
|
|
uint_fast8_t state_bits_diff = (state1 ^ state2) & mask_y13_y16; // difference in state bits 13 and 16
|
|
uint_fast8_t all_diff = evenparity8(bit_diff ^ state_bits_diff); // use parity function to XOR all bits
|
|
return all_diff;
|
|
}
|
|
|
|
|
|
static inline bool remaining_bits_match(uint_fast8_t num_common_bits, uint_fast8_t byte_diff, uint_fast32_t state1, uint_fast32_t state2, odd_even_t odd_even) {
|
|
if (odd_even) {
|
|
// odd bits
|
|
switch (num_common_bits) {
|
|
case 0:
|
|
if (!invariant_holds(byte_diff, state1, state2, 1, 0)) return true;
|
|
case 1:
|
|
if (invalid_state(byte_diff, state1, state2, 1, 0)) return false;
|
|
case 2:
|
|
if (!invariant_holds(byte_diff, state1, state2, 3, 1)) return true;
|
|
case 3:
|
|
if (invalid_state(byte_diff, state1, state2, 3, 1)) return false;
|
|
case 4:
|
|
if (!invariant_holds(byte_diff, state1, state2, 5, 2)) return true;
|
|
case 5:
|
|
if (invalid_state(byte_diff, state1, state2, 5, 2)) return false;
|
|
case 6:
|
|
if (!invariant_holds(byte_diff, state1, state2, 7, 3)) return true;
|
|
case 7:
|
|
if (invalid_state(byte_diff, state1, state2, 7, 3)) return false;
|
|
}
|
|
} else {
|
|
// even bits
|
|
switch (num_common_bits) {
|
|
case 0:
|
|
if (invalid_state(byte_diff, state1, state2, 0, 0)) return false;
|
|
case 1:
|
|
if (!invariant_holds(byte_diff, state1, state2, 2, 1)) return true;
|
|
case 2:
|
|
if (invalid_state(byte_diff, state1, state2, 2, 1)) return false;
|
|
case 3:
|
|
if (!invariant_holds(byte_diff, state1, state2, 4, 2)) return true;
|
|
case 4:
|
|
if (invalid_state(byte_diff, state1, state2, 4, 2)) return false;
|
|
case 5:
|
|
if (!invariant_holds(byte_diff, state1, state2, 6, 3)) return true;
|
|
case 6:
|
|
if (invalid_state(byte_diff, state1, state2, 6, 3)) return false;
|
|
}
|
|
}
|
|
|
|
return true; // valid state
|
|
}
|
|
|
|
|
|
static pthread_mutex_t statelist_cache_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
static pthread_mutex_t book_of_work_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
|
|
typedef enum {
|
|
TO_BE_DONE,
|
|
WORK_IN_PROGRESS,
|
|
COMPLETED
|
|
} work_status_t;
|
|
|
|
static struct sl_cache_entry {
|
|
uint32_t *sl;
|
|
uint32_t len;
|
|
work_status_t cache_status;
|
|
} sl_cache[NUM_PART_SUMS][NUM_PART_SUMS][2];
|
|
|
|
|
|
static void init_statelist_cache(void) {
|
|
pthread_mutex_lock(&statelist_cache_mutex);
|
|
for (uint16_t i = 0; i < NUM_PART_SUMS; i++) {
|
|
for (uint16_t j = 0; j < NUM_PART_SUMS; j++) {
|
|
for (uint16_t k = 0; k < 2; k++) {
|
|
sl_cache[i][j][k].sl = NULL;
|
|
sl_cache[i][j][k].len = 0;
|
|
sl_cache[i][j][k].cache_status = TO_BE_DONE;
|
|
}
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
}
|
|
|
|
|
|
static void free_statelist_cache(void) {
|
|
pthread_mutex_lock(&statelist_cache_mutex);
|
|
for (uint16_t i = 0; i < NUM_PART_SUMS; i++) {
|
|
for (uint16_t j = 0; j < NUM_PART_SUMS; j++) {
|
|
for (uint16_t k = 0; k < 2; k++) {
|
|
free(sl_cache[i][j][k].sl);
|
|
}
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
}
|
|
|
|
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
static inline bool bitflips_match(uint8_t byte, uint32_t state, odd_even_t odd_even, bool quiet)
|
|
#else
|
|
static inline bool bitflips_match(uint8_t byte, uint32_t state, odd_even_t odd_even)
|
|
#endif
|
|
{
|
|
uint32_t *bitset = nonces[byte].states_bitarray[odd_even];
|
|
bool possible = test_bit24(bitset, state);
|
|
if (!possible) {
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
if (!quiet && known_target_key != -1 && state == test_state[odd_even]) {
|
|
PrintAndLogEx(NORMAL, "Initial state lists: %s test state eliminated by bitflip property.\n", odd_even == EVEN_STATE ? "even" : "odd");
|
|
sprintf(failstr, "Initial %s Byte Bitflip property", odd_even == EVEN_STATE ? "even" : "odd");
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static uint_fast8_t reverse(uint_fast8_t b) {
|
|
b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
|
|
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
|
|
b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
|
|
return b;
|
|
}
|
|
|
|
|
|
static bool all_bitflips_match(uint8_t byte, uint32_t state, odd_even_t odd_even) {
|
|
uint32_t masks[2][8] = {
|
|
{0x00fffff0, 0x00fffff8, 0x00fffff8, 0x00fffffc, 0x00fffffc, 0x00fffffe, 0x00fffffe, 0x00ffffff},
|
|
{0x00fffff0, 0x00fffff0, 0x00fffff8, 0x00fffff8, 0x00fffffc, 0x00fffffc, 0x00fffffe, 0x00fffffe}
|
|
};
|
|
|
|
for (uint16_t i = 1; i < 256; i++) {
|
|
uint_fast8_t bytes_diff = reverse(i); // start with most common bits
|
|
uint_fast8_t byte2 = byte ^ bytes_diff;
|
|
uint_fast8_t num_common = trailing_zeros(bytes_diff);
|
|
uint32_t mask = masks[odd_even][num_common];
|
|
bool found_match = false;
|
|
for (uint8_t remaining_bits = 0; remaining_bits <= (~mask & 0xff); remaining_bits++) {
|
|
if (remaining_bits_match(num_common, bytes_diff, state, (state & mask) | remaining_bits, odd_even)) {
|
|
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
if (bitflips_match(byte2, (state & mask) | remaining_bits, odd_even, true)) {
|
|
#else
|
|
if (bitflips_match(byte2, (state & mask) | remaining_bits, odd_even)) {
|
|
#endif
|
|
found_match = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found_match) {
|
|
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
if (known_target_key != -1 && state == test_state[odd_even]) {
|
|
PrintAndLogEx(NORMAL, "all_bitflips_match() 1st Byte: %s test state (0x%06x): Eliminated. Bytes = %02x, %02x, Common Bits = %d\n",
|
|
odd_even == ODD_STATE ? "odd" : "even",
|
|
test_state[odd_even],
|
|
byte,
|
|
byte2,
|
|
num_common);
|
|
if (failstr[0] == '\0') {
|
|
sprintf(failstr, "Other 1st Byte %s, all_bitflips_match(), no match", odd_even ? "odd" : "even");
|
|
}
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void bitarray_to_list(uint8_t byte, uint32_t *bitarray, uint32_t *state_list, uint32_t *len, odd_even_t odd_even) {
|
|
uint32_t *p = state_list;
|
|
for (uint32_t state = next_state(bitarray, -1L); state < (1 << 24); state = next_state(bitarray, state)) {
|
|
if (all_bitflips_match(byte, state, odd_even)) {
|
|
*p++ = state;
|
|
}
|
|
}
|
|
// add End Of List marker
|
|
*p = 0xffffffff;
|
|
*len = p - state_list;
|
|
}
|
|
|
|
|
|
static void add_cached_states(statelist_t *candidates, uint16_t part_sum_a0, uint16_t part_sum_a8, odd_even_t odd_even) {
|
|
candidates->states[odd_even] = sl_cache[part_sum_a0 / 2][part_sum_a8 / 2][odd_even].sl;
|
|
candidates->len[odd_even] = sl_cache[part_sum_a0 / 2][part_sum_a8 / 2][odd_even].len;
|
|
return;
|
|
}
|
|
|
|
|
|
static void add_matching_states(statelist_t *candidates, uint8_t part_sum_a0, uint8_t part_sum_a8, odd_even_t odd_even) {
|
|
const uint32_t worstcase_size = 1 << 20;
|
|
candidates->states[odd_even] = (uint32_t *)malloc(sizeof(uint32_t) * worstcase_size);
|
|
if (candidates->states[odd_even] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in add_matching_states() - statelist.\n");
|
|
exit(4);
|
|
}
|
|
uint32_t *candidates_bitarray = (uint32_t *)malloc_bitarray(sizeof(uint32_t) * worstcase_size);
|
|
if (candidates_bitarray == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in add_matching_states() - bitarray.\n");
|
|
free(candidates->states[odd_even]);
|
|
exit(4);
|
|
}
|
|
|
|
uint32_t *bitarray_a0 = part_sum_a0_bitarrays[odd_even][part_sum_a0 / 2];
|
|
uint32_t *bitarray_a8 = part_sum_a8_bitarrays[odd_even][part_sum_a8 / 2];
|
|
uint32_t *bitarray_bitflips = nonces[best_first_bytes[0]].states_bitarray[odd_even];
|
|
|
|
bitarray_AND4(candidates_bitarray, bitarray_a0, bitarray_a8, bitarray_bitflips);
|
|
|
|
bitarray_to_list(best_first_bytes[0], candidates_bitarray, candidates->states[odd_even], &(candidates->len[odd_even]), odd_even);
|
|
|
|
if (candidates->len[odd_even] == 0) {
|
|
free(candidates->states[odd_even]);
|
|
candidates->states[odd_even] = NULL;
|
|
} else if (candidates->len[odd_even] + 1 < worstcase_size) {
|
|
candidates->states[odd_even] = realloc(candidates->states[odd_even], sizeof(uint32_t) * (candidates->len[odd_even] + 1));
|
|
}
|
|
free_bitarray(candidates_bitarray);
|
|
|
|
pthread_mutex_lock(&statelist_cache_mutex);
|
|
sl_cache[part_sum_a0 / 2][part_sum_a8 / 2][odd_even].sl = candidates->states[odd_even];
|
|
sl_cache[part_sum_a0 / 2][part_sum_a8 / 2][odd_even].len = candidates->len[odd_even];
|
|
sl_cache[part_sum_a0 / 2][part_sum_a8 / 2][odd_even].cache_status = COMPLETED;
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
return;
|
|
}
|
|
|
|
static statelist_t *add_more_candidates(void) {
|
|
statelist_t *new_candidates = candidates;
|
|
if (candidates == NULL) {
|
|
candidates = (statelist_t *)malloc(sizeof(statelist_t));
|
|
new_candidates = candidates;
|
|
} else {
|
|
new_candidates = candidates;
|
|
while (new_candidates->next != NULL) {
|
|
new_candidates = new_candidates->next;
|
|
}
|
|
new_candidates = new_candidates->next = (statelist_t *)malloc(sizeof(statelist_t));
|
|
}
|
|
new_candidates->next = NULL;
|
|
new_candidates->len[ODD_STATE] = 0;
|
|
new_candidates->len[EVEN_STATE] = 0;
|
|
new_candidates->states[ODD_STATE] = NULL;
|
|
new_candidates->states[EVEN_STATE] = NULL;
|
|
return new_candidates;
|
|
}
|
|
|
|
static void add_bitflip_candidates(uint8_t byte) {
|
|
statelist_t *candidates1 = add_more_candidates();
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t worstcase_size = nonces[byte].num_states_bitarray[odd_even] + 1;
|
|
candidates1->states[odd_even] = (uint32_t *)malloc(sizeof(uint32_t) * worstcase_size);
|
|
if (candidates1->states[odd_even] == NULL) {
|
|
PrintAndLogEx(WARNING, "Out of memory error in add_bitflip_candidates().\n");
|
|
exit(4);
|
|
}
|
|
|
|
bitarray_to_list(byte, nonces[byte].states_bitarray[odd_even], candidates1->states[odd_even], &(candidates1->len[odd_even]), odd_even);
|
|
|
|
if (candidates1->len[odd_even] + 1 < worstcase_size) {
|
|
candidates1->states[odd_even] = realloc(candidates1->states[odd_even], sizeof(uint32_t) * (candidates1->len[odd_even] + 1));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
static bool TestIfKeyExists(uint64_t key) {
|
|
struct Crypto1State *pcs;
|
|
pcs = crypto1_create(key);
|
|
crypto1_byte(pcs, (cuid >> 24) ^ best_first_bytes[0], true);
|
|
|
|
uint32_t state_odd = pcs->odd & 0x00ffffff;
|
|
uint32_t state_even = pcs->even & 0x00ffffff;
|
|
|
|
uint64_t count = 0;
|
|
for (statelist_t *p = candidates; p != NULL; p = p->next) {
|
|
bool found_odd = false;
|
|
bool found_even = false;
|
|
uint32_t *p_odd = p->states[ODD_STATE];
|
|
uint32_t *p_even = p->states[EVEN_STATE];
|
|
if (p_odd != NULL && p_even != NULL) {
|
|
while (*p_odd != 0xffffffff) {
|
|
if ((*p_odd & 0x00ffffff) == state_odd) {
|
|
found_odd = true;
|
|
break;
|
|
}
|
|
p_odd++;
|
|
}
|
|
while (*p_even != 0xffffffff) {
|
|
if ((*p_even & 0x00ffffff) == state_even) {
|
|
found_even = true;
|
|
}
|
|
p_even++;
|
|
}
|
|
count += (uint64_t)(p_odd - p->states[ODD_STATE]) * (uint64_t)(p_even - p->states[EVEN_STATE]);
|
|
}
|
|
if (found_odd && found_even) {
|
|
num_keys_tested += count;
|
|
hardnested_print_progress(num_acquired_nonces, "(Test: Key found)", 0.0, 0);
|
|
crypto1_destroy(pcs);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
num_keys_tested += count;
|
|
hardnested_print_progress(num_acquired_nonces, "(Test: Key NOT found)", 0.0, 0);
|
|
|
|
crypto1_destroy(pcs);
|
|
return false;
|
|
}
|
|
|
|
static work_status_t book_of_work[NUM_PART_SUMS][NUM_PART_SUMS][NUM_PART_SUMS][NUM_PART_SUMS];
|
|
|
|
static void init_book_of_work(void) {
|
|
for (uint8_t p = 0; p < NUM_PART_SUMS; p++) {
|
|
for (uint8_t q = 0; q < NUM_PART_SUMS; q++) {
|
|
for (uint8_t r = 0; r < NUM_PART_SUMS; r++) {
|
|
for (uint8_t s = 0; s < NUM_PART_SUMS; s++) {
|
|
book_of_work[p][q][r][s] = TO_BE_DONE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
#ifdef __has_attribute
|
|
#if __has_attribute(force_align_arg_pointer)
|
|
__attribute__((force_align_arg_pointer))
|
|
#endif
|
|
#endif
|
|
*generate_candidates_worker_thread(void *args) {
|
|
uint16_t *sum_args = (uint16_t *)args;
|
|
uint16_t sum_a0 = sums[sum_args[0]];
|
|
uint16_t sum_a8 = sums[sum_args[1]];
|
|
// uint16_t my_thread_number = sums[2];
|
|
|
|
bool there_might_be_more_work = true;
|
|
do {
|
|
there_might_be_more_work = false;
|
|
for (uint8_t p = 0; p < NUM_PART_SUMS; p++) {
|
|
for (uint8_t q = 0; q < NUM_PART_SUMS; q++) {
|
|
if (2 * p * (16 - 2 * q) + (16 - 2 * p) * 2 * q == sum_a0) {
|
|
// PrintAndLogEx(NORMAL, "Reducing Partial Statelists (p,q) = (%d,%d) with lengths %d, %d\n",
|
|
// p, q, partial_statelist[p].len[ODD_STATE], partial_statelist[q].len[EVEN_STATE]);
|
|
for (uint8_t r = 0; r < NUM_PART_SUMS; r++) {
|
|
for (uint8_t s = 0; s < NUM_PART_SUMS; s++) {
|
|
if (2 * r * (16 - 2 * s) + (16 - 2 * r) * 2 * s == sum_a8) {
|
|
pthread_mutex_lock(&book_of_work_mutex);
|
|
if (book_of_work[p][q][r][s] != TO_BE_DONE) { // this has been done or is currently been done by another thread. Look for some other work.
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
continue;
|
|
}
|
|
|
|
pthread_mutex_lock(&statelist_cache_mutex);
|
|
if (sl_cache[p][r][ODD_STATE].cache_status == WORK_IN_PROGRESS
|
|
|| sl_cache[q][s][EVEN_STATE].cache_status == WORK_IN_PROGRESS) { // defer until not blocked by another thread.
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
there_might_be_more_work = true;
|
|
continue;
|
|
}
|
|
|
|
// we finally can do some work.
|
|
book_of_work[p][q][r][s] = WORK_IN_PROGRESS;
|
|
statelist_t *current_candidates = add_more_candidates();
|
|
|
|
// Check for cached results and add them first
|
|
bool odd_completed = false;
|
|
if (sl_cache[p][r][ODD_STATE].cache_status == COMPLETED) {
|
|
add_cached_states(current_candidates, 2 * p, 2 * r, ODD_STATE);
|
|
odd_completed = true;
|
|
}
|
|
bool even_completed = false;
|
|
if (sl_cache[q][s][EVEN_STATE].cache_status == COMPLETED) {
|
|
add_cached_states(current_candidates, 2 * q, 2 * s, EVEN_STATE);
|
|
even_completed = true;
|
|
}
|
|
|
|
bool work_required = true;
|
|
|
|
// if there had been two cached results, there is no more work to do
|
|
if (even_completed && odd_completed) {
|
|
work_required = false;
|
|
}
|
|
|
|
// if there had been one cached empty result, there is no need to calculate the other part:
|
|
if (work_required) {
|
|
if (even_completed && !current_candidates->len[EVEN_STATE]) {
|
|
current_candidates->len[ODD_STATE] = 0;
|
|
current_candidates->states[ODD_STATE] = NULL;
|
|
work_required = false;
|
|
}
|
|
if (odd_completed && !current_candidates->len[ODD_STATE]) {
|
|
current_candidates->len[EVEN_STATE] = 0;
|
|
current_candidates->states[EVEN_STATE] = NULL;
|
|
work_required = false;
|
|
}
|
|
}
|
|
|
|
if (!work_required) {
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
} else {
|
|
// we really need to calculate something
|
|
if (even_completed) { // we had one cache hit with non-zero even states
|
|
// PrintAndLogEx(NORMAL, "Thread #%u: start working on odd states p=%2d, r=%2d...\n", my_thread_number, p, r);
|
|
sl_cache[p][r][ODD_STATE].cache_status = WORK_IN_PROGRESS;
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
add_matching_states(current_candidates, 2 * p, 2 * r, ODD_STATE);
|
|
work_required = false;
|
|
} else if (odd_completed) { // we had one cache hit with non-zero odd_states
|
|
// PrintAndLogEx(NORMAL, "Thread #%u: start working on even states q=%2d, s=%2d...\n", my_thread_number, q, s);
|
|
sl_cache[q][s][EVEN_STATE].cache_status = WORK_IN_PROGRESS;
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
add_matching_states(current_candidates, 2 * q, 2 * s, EVEN_STATE);
|
|
work_required = false;
|
|
}
|
|
}
|
|
|
|
if (work_required) { // we had no cached result. Need to calculate both odd and even
|
|
sl_cache[p][r][ODD_STATE].cache_status = WORK_IN_PROGRESS;
|
|
sl_cache[q][s][EVEN_STATE].cache_status = WORK_IN_PROGRESS;
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
|
|
add_matching_states(current_candidates, 2 * p, 2 * r, ODD_STATE);
|
|
if (current_candidates->len[ODD_STATE]) {
|
|
// PrintAndLogEx(NORMAL, "Thread #%u: start working on even states q=%2d, s=%2d...\n", my_thread_number, q, s);
|
|
add_matching_states(current_candidates, 2 * q, 2 * s, EVEN_STATE);
|
|
} else { // no need to calculate even states yet
|
|
pthread_mutex_lock(&statelist_cache_mutex);
|
|
sl_cache[q][s][EVEN_STATE].cache_status = TO_BE_DONE;
|
|
pthread_mutex_unlock(&statelist_cache_mutex);
|
|
current_candidates->len[EVEN_STATE] = 0;
|
|
current_candidates->states[EVEN_STATE] = NULL;
|
|
}
|
|
}
|
|
|
|
// update book of work
|
|
pthread_mutex_lock(&book_of_work_mutex);
|
|
book_of_work[p][q][r][s] = COMPLETED;
|
|
pthread_mutex_unlock(&book_of_work_mutex);
|
|
|
|
// if ((uint64_t)current_candidates->len[ODD_STATE] * current_candidates->len[EVEN_STATE]) {
|
|
// PrintAndLogEx(NORMAL, "Candidates for p=%2u, q=%2u, r=%2u, s=%2u: %" PRIu32 " * %" PRIu32 " = %" PRIu64 " (2^%0.1f)\n",
|
|
// 2*p, 2*q, 2*r, 2*s, current_candidates->len[ODD_STATE], current_candidates->len[EVEN_STATE],
|
|
// (uint64_t)current_candidates->len[ODD_STATE] * current_candidates->len[EVEN_STATE],
|
|
// log((uint64_t)current_candidates->len[ODD_STATE] * current_candidates->len[EVEN_STATE])/log(2));
|
|
// uint32_t estimated_odd = estimated_num_states_part_sum(best_first_bytes[0], p, r, ODD_STATE);
|
|
// uint32_t estimated_even= estimated_num_states_part_sum(best_first_bytes[0], q, s, EVEN_STATE);
|
|
// uint64_t estimated_total = (uint64_t)estimated_odd * estimated_even;
|
|
// PrintAndLogEx(NORMAL, "Estimated: %" PRIu32 " * %" PRIu32 " = %" PRIu64 " (2^%0.1f)\n", estimated_odd, estimated_even, estimated_total, log(estimated_total) / log(2));
|
|
// if (estimated_odd < current_candidates->len[ODD_STATE] || estimated_even < current_candidates->len[EVEN_STATE]) {
|
|
// PrintAndLogEx(NORMAL, "############################################################################ERROR! ESTIMATED < REAL !!!\n");
|
|
// //exit(2);
|
|
// }
|
|
// }
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} while (there_might_be_more_work);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void generate_candidates(uint8_t sum_a0_idx, uint8_t sum_a8_idx) {
|
|
|
|
init_statelist_cache();
|
|
init_book_of_work();
|
|
|
|
// create mutexes for accessing the statelist cache and our "book of work"
|
|
pthread_mutex_init(&statelist_cache_mutex, NULL);
|
|
pthread_mutex_init(&book_of_work_mutex, NULL);
|
|
|
|
// create and run worker threads
|
|
pthread_t thread_id[NUM_REDUCTION_WORKING_THREADS];
|
|
|
|
uint16_t sums1[NUM_REDUCTION_WORKING_THREADS][3];
|
|
for (uint16_t i = 0; i < NUM_REDUCTION_WORKING_THREADS; i++) {
|
|
sums1[i][0] = sum_a0_idx;
|
|
sums1[i][1] = sum_a8_idx;
|
|
sums1[i][2] = i + 1;
|
|
pthread_create(thread_id + i, NULL, generate_candidates_worker_thread, sums1[i]);
|
|
}
|
|
|
|
// wait for threads to terminate:
|
|
for (uint16_t i = 0; i < NUM_REDUCTION_WORKING_THREADS; i++) {
|
|
pthread_join(thread_id[i], NULL);
|
|
}
|
|
|
|
// clean up mutex
|
|
pthread_mutex_destroy(&statelist_cache_mutex);
|
|
|
|
maximum_states = 0;
|
|
for (statelist_t *sl = candidates; sl != NULL; sl = sl->next) {
|
|
maximum_states += (uint64_t)sl->len[ODD_STATE] * sl->len[EVEN_STATE];
|
|
}
|
|
|
|
for (uint8_t i = 0; i < NUM_SUMS; i++) {
|
|
if (nonces[best_first_bytes[0]].sum_a8_guess[i].sum_a8_idx == sum_a8_idx) {
|
|
nonces[best_first_bytes[0]].sum_a8_guess[i].num_states = maximum_states;
|
|
break;
|
|
}
|
|
}
|
|
update_expected_brute_force(best_first_bytes[0]);
|
|
|
|
hardnested_print_progress(num_acquired_nonces, "Apply Sum(a8) and all bytes bitflip properties", nonces[best_first_bytes[0]].expected_num_brute_force, 0);
|
|
}
|
|
|
|
static void free_candidates_memory(statelist_t *sl) {
|
|
if (sl == NULL)
|
|
return;
|
|
|
|
free_candidates_memory(sl->next);
|
|
free(sl);
|
|
}
|
|
|
|
static void pre_XOR_nonces(void) {
|
|
// prepare acquired nonces for faster brute forcing.
|
|
|
|
// XOR the cryptoUID and its parity
|
|
for (uint16_t i = 0; i < 256; i++) {
|
|
noncelistentry_t *test_nonce = nonces[i].first;
|
|
while (test_nonce != NULL) {
|
|
test_nonce->nonce_enc ^= cuid;
|
|
test_nonce->par_enc ^= oddparity8(cuid >> 0 & 0xff) << 0;
|
|
test_nonce->par_enc ^= oddparity8(cuid >> 8 & 0xff) << 1;
|
|
test_nonce->par_enc ^= oddparity8(cuid >> 16 & 0xff) << 2;
|
|
test_nonce->par_enc ^= oddparity8(cuid >> 24 & 0xff) << 3;
|
|
test_nonce = test_nonce->next;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool brute_force(uint64_t *found_key) {
|
|
if (known_target_key != -1) {
|
|
TestIfKeyExists(known_target_key);
|
|
}
|
|
return brute_force_bs(NULL, candidates, cuid, num_acquired_nonces, maximum_states, nonces, best_first_bytes, found_key);
|
|
}
|
|
|
|
static uint16_t SumProperty(struct Crypto1State *s) {
|
|
uint16_t sum_odd = PartialSumProperty(s->odd, ODD_STATE);
|
|
uint16_t sum_even = PartialSumProperty(s->even, EVEN_STATE);
|
|
return (sum_odd * (16 - sum_even) + (16 - sum_odd) * sum_even);
|
|
}
|
|
|
|
static void Tests() {
|
|
|
|
if (known_target_key == -1)
|
|
return;
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t *bitset = nonces[best_first_bytes[0]].states_bitarray[odd_even];
|
|
if (!test_bit24(bitset, test_state[odd_even])) {
|
|
PrintAndLogEx(NORMAL, "\nBUG: known target key's %s state is not member of first nonce byte's (0x%02x) states_bitarray!\n",
|
|
odd_even == EVEN_STATE ? "even" : "odd ",
|
|
best_first_bytes[0]);
|
|
}
|
|
}
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t *bitset = all_bitflips_bitarray[odd_even];
|
|
if (!test_bit24(bitset, test_state[odd_even])) {
|
|
PrintAndLogEx(NORMAL, "\nBUG: known target key's %s state is not member of all_bitflips_bitarray!\n",
|
|
odd_even == EVEN_STATE ? "even" : "odd ");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void Tests2(void) {
|
|
|
|
if (known_target_key == -1)
|
|
return;
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t *bitset = nonces[best_first_byte_smallest_bitarray].states_bitarray[odd_even];
|
|
if (!test_bit24(bitset, test_state[odd_even])) {
|
|
PrintAndLogEx(NORMAL, "\nBUG: known target key's %s state is not member of first nonce byte's (0x%02x) states_bitarray!\n",
|
|
odd_even == EVEN_STATE ? "even" : "odd ",
|
|
best_first_byte_smallest_bitarray);
|
|
}
|
|
}
|
|
|
|
for (odd_even_t odd_even = EVEN_STATE; odd_even <= ODD_STATE; odd_even++) {
|
|
uint32_t *bitset = all_bitflips_bitarray[odd_even];
|
|
if (!test_bit24(bitset, test_state[odd_even])) {
|
|
PrintAndLogEx(NORMAL, "\nBUG: known target key's %s state is not member of all_bitflips_bitarray!\n",
|
|
odd_even == EVEN_STATE ? "even" : "odd ");
|
|
}
|
|
}
|
|
}
|
|
|
|
static uint16_t real_sum_a8 = 0;
|
|
|
|
static void set_test_state(uint8_t byte) {
|
|
struct Crypto1State *pcs;
|
|
pcs = crypto1_create(known_target_key);
|
|
crypto1_byte(pcs, (cuid >> 24) ^ byte, true);
|
|
test_state[ODD_STATE] = pcs->odd & 0x00ffffff;
|
|
test_state[EVEN_STATE] = pcs->even & 0x00ffffff;
|
|
real_sum_a8 = SumProperty(pcs);
|
|
crypto1_destroy(pcs);
|
|
}
|
|
|
|
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, uint64_t *foundkey, char *filename) {
|
|
char progress_text[80];
|
|
char instr_set[12] = {0};
|
|
|
|
get_SIMD_instruction_set(instr_set);
|
|
PrintAndLogEx(SUCCESS, "Using %s SIMD core.", instr_set);
|
|
|
|
srand((unsigned) time(NULL));
|
|
brute_force_per_second = brute_force_benchmark();
|
|
write_stats = false;
|
|
|
|
if (tests) {
|
|
// set the correct locale for the stats printing
|
|
write_stats = true;
|
|
setlocale(LC_NUMERIC, "");
|
|
if ((fstats = fopen("hardnested_stats.txt", "a")) == NULL) {
|
|
PrintAndLogEx(WARNING, "Could not create/open file hardnested_stats.txt");
|
|
return 3;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < tests; i++) {
|
|
start_time = msclock();
|
|
print_progress_header();
|
|
sprintf(progress_text, "Brute force benchmark: %1.0f million (2^%1.1f) keys/s", brute_force_per_second / 1000000, log(brute_force_per_second) / log(2.0));
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
sprintf(progress_text, "Starting Test #%" PRIu32 " ...", i + 1);
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
|
|
if (trgkey != NULL) {
|
|
known_target_key = bytes_to_num(trgkey, 6);
|
|
} else {
|
|
known_target_key = -1;
|
|
}
|
|
|
|
init_bitflip_bitarrays();
|
|
init_part_sum_bitarrays();
|
|
init_sum_bitarrays();
|
|
init_allbitflips_array();
|
|
init_nonce_memory();
|
|
update_reduction_rate(0.0, true);
|
|
|
|
simulate_acquire_nonces();
|
|
|
|
set_test_state(best_first_bytes[0]);
|
|
|
|
Tests();
|
|
free_bitflip_bitarrays();
|
|
|
|
fprintf(fstats, "%" PRIu16 ";%1.1f;", sums[first_byte_Sum], log(p_K0[first_byte_Sum]) / log(2.0));
|
|
fprintf(fstats, "%" PRIu16 ";%1.1f;", sums[nonces[best_first_bytes[0]].sum_a8_guess[0].sum_a8_idx], log(p_K[nonces[best_first_bytes[0]].sum_a8_guess[0].sum_a8_idx]) / log(2.0));
|
|
fprintf(fstats, "%" PRIu16 ";", real_sum_a8);
|
|
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
failstr[0] = '\0';
|
|
#endif
|
|
bool key_found = false;
|
|
num_keys_tested = 0;
|
|
uint32_t num_odd = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[ODD_STATE];
|
|
uint32_t num_even = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[EVEN_STATE];
|
|
float expected_brute_force1 = (float)num_odd * num_even / 2.0;
|
|
float expected_brute_force2 = nonces[best_first_bytes[0]].expected_num_brute_force;
|
|
fprintf(fstats, "%1.1f;%1.1f;", log(expected_brute_force1) / log(2.0), log(expected_brute_force2) / log(2.0));
|
|
|
|
if (expected_brute_force1 < expected_brute_force2) {
|
|
hardnested_print_progress(num_acquired_nonces, "(Ignoring Sum(a8) properties)", expected_brute_force1, 0);
|
|
set_test_state(best_first_byte_smallest_bitarray);
|
|
add_bitflip_candidates(best_first_byte_smallest_bitarray);
|
|
Tests2();
|
|
maximum_states = 0;
|
|
for (statelist_t *sl = candidates; sl != NULL; sl = sl->next) {
|
|
maximum_states += (uint64_t)sl->len[ODD_STATE] * sl->len[EVEN_STATE];
|
|
}
|
|
|
|
best_first_bytes[0] = best_first_byte_smallest_bitarray;
|
|
pre_XOR_nonces();
|
|
prepare_bf_test_nonces(nonces, best_first_bytes[0]);
|
|
|
|
key_found = brute_force(foundkey);
|
|
free(candidates->states[ODD_STATE]);
|
|
free(candidates->states[EVEN_STATE]);
|
|
free_candidates_memory(candidates);
|
|
candidates = NULL;
|
|
} else {
|
|
pre_XOR_nonces();
|
|
prepare_bf_test_nonces(nonces, best_first_bytes[0]);
|
|
for (uint8_t j = 0; j < NUM_SUMS && !key_found; j++) {
|
|
float expected_brute_force = nonces[best_first_bytes[0]].expected_num_brute_force;
|
|
sprintf(progress_text, "(%d. guess: Sum(a8) = %" PRIu16 ")", j + 1, sums[nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx]);
|
|
hardnested_print_progress(num_acquired_nonces, progress_text, expected_brute_force, 0);
|
|
if (sums[nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx] != real_sum_a8) {
|
|
sprintf(progress_text, "(Estimated Sum(a8) is WRONG! Correct Sum(a8) = %" PRIu16 ")", real_sum_a8);
|
|
hardnested_print_progress(num_acquired_nonces, progress_text, expected_brute_force, 0);
|
|
}
|
|
generate_candidates(first_byte_Sum, nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx);
|
|
|
|
key_found = brute_force(foundkey);
|
|
free_statelist_cache();
|
|
free_candidates_memory(candidates);
|
|
candidates = NULL;
|
|
if (!key_found) {
|
|
// update the statistics
|
|
nonces[best_first_bytes[0]].sum_a8_guess[j].prob = 0;
|
|
nonces[best_first_bytes[0]].sum_a8_guess[j].num_states = 0;
|
|
// and calculate new expected number of brute forces
|
|
update_expected_brute_force(best_first_bytes[0]);
|
|
}
|
|
}
|
|
}
|
|
#ifdef DEBUG_KEY_ELIMINATION
|
|
fprintf(fstats, "%1.1f;%1.0f;%c;%s\n",
|
|
log(num_keys_tested) / log(2.0),
|
|
(float)num_keys_tested / brute_force_per_second,
|
|
key_found ? 'Y' : 'N',
|
|
failstr
|
|
);
|
|
#else
|
|
fprintf(fstats, "%1.0f;%d\n",
|
|
log(num_keys_tested) / log(2.0),
|
|
(float)num_keys_tested / brute_force_per_second,
|
|
key_found
|
|
);
|
|
#endif
|
|
|
|
free_nonces_memory();
|
|
free_bitarray(all_bitflips_bitarray[ODD_STATE]);
|
|
free_bitarray(all_bitflips_bitarray[EVEN_STATE]);
|
|
free_sum_bitarrays();
|
|
free_part_sum_bitarrays();
|
|
}
|
|
fclose(fstats);
|
|
} else {
|
|
start_time = msclock();
|
|
print_progress_header();
|
|
sprintf(progress_text, "Brute force benchmark: %1.0f million (2^%1.1f) keys/s", brute_force_per_second / 1000000, log(brute_force_per_second) / log(2.0));
|
|
hardnested_print_progress(0, progress_text, (float)(1LL << 47), 0);
|
|
init_bitflip_bitarrays();
|
|
init_part_sum_bitarrays();
|
|
init_sum_bitarrays();
|
|
init_allbitflips_array();
|
|
init_nonce_memory();
|
|
update_reduction_rate(0.0, true);
|
|
|
|
if (nonce_file_read) { // use pre-acquired data from file nonces.bin
|
|
if (read_nonce_file(filename) != 0) {
|
|
free_bitflip_bitarrays();
|
|
free_nonces_memory();
|
|
free_bitarray(all_bitflips_bitarray[ODD_STATE]);
|
|
free_bitarray(all_bitflips_bitarray[EVEN_STATE]);
|
|
free_sum_bitarrays();
|
|
free_part_sum_bitarrays();
|
|
return 3;
|
|
}
|
|
hardnested_stage = CHECK_1ST_BYTES | CHECK_2ND_BYTES;
|
|
update_nonce_data(false);
|
|
float brute_force_depth;
|
|
shrink_key_space(&brute_force_depth);
|
|
} else { // acquire nonces.
|
|
uint16_t is_OK = acquire_nonces(blockNo, keyType, key, trgBlockNo, trgKeyType, nonce_file_write, slow, filename);
|
|
if (is_OK != 0) {
|
|
free_bitflip_bitarrays();
|
|
free_nonces_memory();
|
|
free_bitarray(all_bitflips_bitarray[ODD_STATE]);
|
|
free_bitarray(all_bitflips_bitarray[EVEN_STATE]);
|
|
free_sum_bitarrays();
|
|
free_part_sum_bitarrays();
|
|
return is_OK;
|
|
}
|
|
}
|
|
|
|
if (trgkey != NULL) {
|
|
known_target_key = bytes_to_num(trgkey, 6);
|
|
set_test_state(best_first_bytes[0]);
|
|
} else {
|
|
known_target_key = -1;
|
|
}
|
|
|
|
Tests();
|
|
|
|
free_bitflip_bitarrays();
|
|
bool key_found = false;
|
|
num_keys_tested = 0;
|
|
uint32_t num_odd = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[ODD_STATE];
|
|
uint32_t num_even = nonces[best_first_byte_smallest_bitarray].num_states_bitarray[EVEN_STATE];
|
|
float expected_brute_force1 = (float)num_odd * num_even / 2.0;
|
|
float expected_brute_force2 = nonces[best_first_bytes[0]].expected_num_brute_force;
|
|
|
|
if (expected_brute_force1 < expected_brute_force2) {
|
|
hardnested_print_progress(num_acquired_nonces, "(Ignoring Sum(a8) properties)", expected_brute_force1, 0);
|
|
set_test_state(best_first_byte_smallest_bitarray);
|
|
add_bitflip_candidates(best_first_byte_smallest_bitarray);
|
|
Tests2();
|
|
maximum_states = 0;
|
|
|
|
for (statelist_t *sl = candidates; sl != NULL; sl = sl->next) {
|
|
maximum_states += (uint64_t)sl->len[ODD_STATE] * sl->len[EVEN_STATE];
|
|
}
|
|
|
|
best_first_bytes[0] = best_first_byte_smallest_bitarray;
|
|
pre_XOR_nonces();
|
|
prepare_bf_test_nonces(nonces, best_first_bytes[0]);
|
|
|
|
key_found = brute_force(foundkey);
|
|
free(candidates->states[ODD_STATE]);
|
|
free(candidates->states[EVEN_STATE]);
|
|
free_candidates_memory(candidates);
|
|
candidates = NULL;
|
|
} else {
|
|
|
|
pre_XOR_nonces();
|
|
prepare_bf_test_nonces(nonces, best_first_bytes[0]);
|
|
|
|
for (uint8_t j = 0; j < NUM_SUMS && !key_found; j++) {
|
|
float expected_brute_force = nonces[best_first_bytes[0]].expected_num_brute_force;
|
|
sprintf(progress_text, "(%d. guess: Sum(a8) = %" PRIu16 ")", j + 1, sums[nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx]);
|
|
hardnested_print_progress(num_acquired_nonces, progress_text, expected_brute_force, 0);
|
|
|
|
if (trgkey != NULL && sums[nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx] != real_sum_a8) {
|
|
sprintf(progress_text, "(Estimated Sum(a8) is WRONG! Correct Sum(a8) = %" PRIu16 ")", real_sum_a8);
|
|
hardnested_print_progress(num_acquired_nonces, progress_text, expected_brute_force, 0);
|
|
}
|
|
|
|
generate_candidates(first_byte_Sum, nonces[best_first_bytes[0]].sum_a8_guess[j].sum_a8_idx);
|
|
key_found = brute_force(foundkey);
|
|
free_statelist_cache();
|
|
free_candidates_memory(candidates);
|
|
candidates = NULL;
|
|
if (!key_found) {
|
|
// update the statistics
|
|
nonces[best_first_bytes[0]].sum_a8_guess[j].prob = 0;
|
|
nonces[best_first_bytes[0]].sum_a8_guess[j].num_states = 0;
|
|
// and calculate new expected number of brute forces
|
|
update_expected_brute_force(best_first_bytes[0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
free_nonces_memory();
|
|
free_bitarray(all_bitflips_bitarray[ODD_STATE]);
|
|
free_bitarray(all_bitflips_bitarray[EVEN_STATE]);
|
|
free_sum_bitarrays();
|
|
free_part_sum_bitarrays();
|
|
}
|
|
return 0;
|
|
}
|