#include <iostream>
#include <vector>

// Simulated Lindell17 protocol implementation
class Lindell17Protocol {
public:
    // Simulated ECDSA constant
    static const int q = 256;

    // Simulated server's secret share
    int x2;

    Lindell17Protocol(int secretShare) : x2(secretShare) {}

    // Simulated signature process
    bool sign(int msg, int r) {
        // Simulate abort mechanism
        if (rand() % 10 < 2) {
            std::cout << "Signature failed due to abort.\n";
            return false;
        }

        int k1 = 2;
        int rho = (r % 2 == 0) ? r + q : r;

        int C = hash(msg) + r * x2 * (inverse(k1, q) % q) + rho * x2 * (inverse(k1, q) % q);

        // Simulate signature validation
        return validateSignature(C);
    }

    // Simulated hash function
    int hash(int input) {
        return input % q;
    }

    // Simulated inverse calculation
    int inverse(int num, int mod) {
        for (int i = 1; i < mod; ++i) {
            if ((num * i) % mod == 1) {
                return i;
            }
        }
        return 1;
    }

    // Simulated signature validation
    bool validateSignature(int C) {
        return rand() % 2 == 0;
    }
};

int main() {
    srand(time(0));

    // Simulated server's secret share
    int secretShare = rand() % Lindell17Protocol::q;

    Lindell17Protocol attacker(secretShare);

    // Simulate extracting each bit of the secret share
    std::vector<int> extractedBits;
    for (int i = 0; i < 256; ++i) {
        int msg = rand(); // Simulated message
        int r = rand();   // Simulated public nonce

        if (attacker.sign(msg, r)) {
            extractedBits.push_back(0);
        } else {
            extractedBits.push_back(1);
        }
    }

    // Print the extracted bits
    std::cout << "Extracted bits: ";
    for (int bit : extractedBits) {
        std::cout << bit;
    }
    std::cout << std::endl;

    return 0;
}