108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <math.h>
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#include <time.h>
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#include <regex.h>
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#include <stdint.h>
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#define BUFFER_SIZE 1024
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int check_command(const char *command) {
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char buffer[BUFFER_SIZE];
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snprintf(buffer, sizeof(buffer), "command -v %s > /dev/null 2>&1", command);
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return system(buffer) == 0;
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}
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void generate_random_string(char *str, size_t length) {
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const char charset[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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for (size_t i = 0; i < length; i++) {
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str[i] = charset[rand() % (sizeof(charset) - 1)];
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}
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str[length] = '\0';
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}
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double calculate_difficulty_raw(double difficulty) {
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return round(exp(log(256) * (4 - log(difficulty) / log(256))));
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}
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int main(int argc, char *argv[]) {
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if (!check_command("argon2") || !check_command("xxd") || !check_command("bc")) {
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printf("Required utilities are not installed. Please install them and try again.\n");
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return 1;
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}
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char challenge[BUFFER_SIZE];
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if (argc < 2) {
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printf("Enter Challenge Code: ");
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fgets(challenge, sizeof(challenge), stdin);
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} else {
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strncpy(challenge, argv[1], sizeof(challenge) - 1);
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}
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challenge[strcspn(challenge, "\n")] = 0;
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regex_t regex;
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regcomp(®ex, "^([0-9]+):([0-9]+):([A-Za-z0-9]+):([0-9]+)$", REG_EXTENDED);
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regmatch_t matches[5];
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if (regexec(®ex, challenge, 5, matches, 0) != 0) {
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printf("Invalid challenge format. Expected format: memory_cost:time_cost:salt:difficulty\n");
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return 2;
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}
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char *memory_cost = strtok(challenge, ":");
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char *time_cost = strtok(NULL, ":");
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char *salt = strtok(NULL, ":");
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char *difficulty = strtok(NULL, ":");
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printf("Memory Cost: %s\n", memory_cost);
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printf("Time Cost: %s\n", time_cost);
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printf("Salt: %s\n", salt);
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printf("Difficulty: %s\n", difficulty);
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char pw_prefix[BUFFER_SIZE];
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snprintf(pw_prefix, sizeof(pw_prefix), "UNBLOCK-");
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generate_random_string(pw_prefix + strlen(pw_prefix), 8);
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strcat(pw_prefix, "-");
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double difficulty_raw = calculate_difficulty_raw(atof(difficulty));
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printf("Estimated iterations: %s\n", difficulty);
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printf("Time Cost: %s\n\n", time_cost);
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int n = 1;
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time_t start_time = time(NULL);
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while (1) {
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char pw[BUFFER_SIZE];
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snprintf(pw, sizeof(pw), "%s%d", pw_prefix, n);
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char command[BUFFER_SIZE];
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snprintf(command, sizeof(command), "echo -n \"%s\" | argon2 %s -t %s -k %s -p 1 -id -v 13 -r", pw, salt, time_cost, memory_cost);
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FILE *fp = popen(command, "r");
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if (fp == NULL) {
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printf("Failed to run command\n");
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exit(1);
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}
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char hash_bytes[9] = {0};
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fread(hash_bytes, 1, 8, fp);
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pclose(fp);
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uint32_t hash_value = (uint32_t)strtoul(hash_bytes, NULL, 16);
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if (hash_value < (uint32_t)difficulty_raw) {
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printf("\nSOLUTION FOUND\n");
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printf("Your unblock code is: %s\n", pw);
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printf("This is the code you enter into the site to pass the challenge.\n\n");
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return 0;
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}
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n++;
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printf("\rElapsed Time: %ld seconds.", (time(NULL) - start_time));
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fflush(stdout);
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}
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regfree(®ex);
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return 0;
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}
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