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