104 lines
18 KiB
C
104 lines
18 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
|
|
int check_utility(const char *utility) {
|
|
return (system(utility) == 0);
|
|
}
|
|
|
|
unsigned long hex_to_int(const char *hex) {
|
|
return strtoul(hex, NULL, 16);
|
|
}
|
|
|
|
void elapsed_time(time_t start_time) {
|
|
time_t current_time = time(NULL);
|
|
printf("\rElapsed Time: %ld seconds.", current_time - start_time);
|
|
fflush(stdout);
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
const char *required_utils[] = {"argon2", "xxd", "bc"};
|
|
for (int i = 0; i < 3; i++) {
|
|
if (!check_utility(required_utils[i])) {
|
|
printf("%s is not installed. Please install it and try again.\n", required_utils[i]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
char challenge[100];
|
|
if (argc < 2) {
|
|
printf("Enter Challenge Code: ");
|
|
fgets(challenge, sizeof(challenge), stdin);
|
|
} else {
|
|
strcpy(challenge, argv[1]);
|
|
}
|
|
|
|
// Trim newline character
|
|
challenge[strcspn(challenge, "\n")] = 0;
|
|
|
|
// Validate the challenge format
|
|
if (sscanf(challenge, "%*[^:]:%*[^:]:%*[^:]:%*[^:]") != 4) {
|
|
printf("Invalid challenge format. Expected format: memory_cost:time_cost:salt:difficulty\n");
|
|
return 2;
|
|
}
|
|
|
|
// Parse challenge code
|
|
int memory_cost, time_cost, difficulty;
|
|
char salt[100];
|
|
sscanf(challenge, "%d:%d:%[^:]:%d", &memory_cost, &time_cost, salt, &difficulty);
|
|
|
|
// Debugging output
|
|
printf("Memory Cost: %d\n", memory_cost);
|
|
printf("Time Cost: %d\n", time_cost);
|
|
printf("Salt: %s\n", salt);
|
|
printf("Difficulty: %d\n", difficulty);
|
|
|
|
// Generate prefix for the password
|
|
char pw_prefix[100];
|
|
snprintf(pw_prefix, sizeof(pw_prefix), "UNBLOCK-%08x-", rand() % 0xFFFFFFFF);
|
|
unsigned long difficulty_raw = (unsigned long)exp(log(256) * (4 - log(difficulty) / log(256)));
|
|
|
|
printf("Estimated iterations: %d\n", difficulty);
|
|
printf("Time Cost: %d\n\n", time_cost);
|
|
|
|
int n = 1;
|
|
time_t start_time = time(NULL);
|
|
|
|
// Main loop to find the solution
|
|
while (1) {
|
|
char pw[100];
|
|
snprintf(pw, sizeof(pw), "%s%d", pw_prefix, n);
|
|
char command[256];
|
|
snprintf(command, sizeof(command), "echo -n '%s' | argon2 %s -t %d -k %d -p 1 -id -v 13 -r", pw, salt, time_cost, memory_cost);
|
|
|
|
// Execute command and get hash result
|
|
FILE *fp = popen(command, "r");
|
|
if (!fp) {
|
|
printf("Failed to run command\n");
|
|
exit(1);
|
|
}
|
|
|
|
char hash_result[256];
|
|
fgets(hash_result, sizeof(hash_result), fp);
|
|
pclose(fp);
|
|
|
|
char hash_bytes[9];
|
|
strncpy(hash_bytes, hash_result + 3, 8); // Extract the first 8 bytes from the hash result
|
|
hash_bytes[8] = '\0'; // Null-terminate
|
|
|
|
if (hex_to_int(hash_bytes) < difficulty_raw) {
|
|
printf("\nSOLUTION FOUND\n");
|
|
printf("Your unblock code is: %s\n", pw);
|
|
printf("This is the code you enter into the site to pass the challenge.\n\n");
|
|
break;
|
|
} else {
|
|
elapsed_time(start_time);
|
|
n++;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
} |