PaillierLibrarySamples/encryptionDecryption.cpp at master · AvishayYanay/PaillierLibrarySamples · GitHub

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#include <gmp.h>
#include "paillier.h"
#include<ctime>
#include <iostream>


#define N (1000)

int main(int argc, char *argv[]) {
    // Security parameter (number of bits of the modulus)
    const long n = 512;

    // Generate public and secret keys
    paillier_pubkey_t* pubKey;
    paillier_prvkey_t* secKey;
    paillier_keygen(n, &pubKey, &secKey, paillier_get_rand_devurandom);

    // Plaintext initialization
    paillier_plaintext_t* m;
    m = paillier_plaintext_from_ui(2);

    const clock_t begin_encrypt = clock();
    paillier_ciphertext_t *ctxt;
    for (int i=0; i<N; i++) {
        ctxt = paillier_enc(NULL, pubKey, m, paillier_get_rand_devurandom);
        paillier_freeciphertext(ctxt);
    }
    std::cout << "encrypt " << n << ":" << std::endl << float( clock () - begin_encrypt ) /  CLOCKS_PER_SEC << std::endl;

    ctxt = paillier_enc(NULL, pubKey, m, paillier_get_rand_devurandom);

    const clock_t begin_decrypt = clock();
    paillier_plaintext_t *dec;
    for (int i=0; i<N; i++) {
        dec = paillier_dec(NULL, pubKey, secKey, ctxt);
        paillier_freeplaintext(dec);
    }
    std::cout << "decrypt " << n << ":" << std::endl << float( clock () - begin_decrypt ) /  CLOCKS_PER_SEC << std::endl;

    // Cleaning up
    paillier_freepubkey(pubKey);
    paillier_freeprvkey(secKey);
    paillier_freeplaintext(m);
    paillier_freeplaintext(dec);
    paillier_freeciphertext(ctxt);

    return 0;
}

int main_old(int argc, char *argv[])
{
    // Security parameter (number of bits of the modulus)
    const long n = 256;

    // Generate public and secret keys
    paillier_pubkey_t* pubKey;
    paillier_prvkey_t* secKey;
    paillier_keygen(n, &pubKey, &secKey, paillier_get_rand_devurandom);

    // Plaintext initialization
    paillier_plaintext_t* m;
    m = paillier_plaintext_from_ui(2);
    gmp_printf("Plaintext: %Zd\n", m);

    // Encrypt the message
    paillier_ciphertext_t* ctxt;
    ctxt = paillier_enc(NULL, pubKey, m, paillier_get_rand_devurandom);
    gmp_printf("Ciphertext: %Zd\n", ctxt);

    // Decrypt the ciphertext
    paillier_plaintext_t* dec;
    dec = paillier_dec(NULL, pubKey, secKey, ctxt);
    gmp_printf("Decrypted: %Zd\n", dec);

    // Cleaning up
    paillier_freepubkey(pubKey);
    paillier_freeprvkey(secKey);
    paillier_freeplaintext(m);
    paillier_freeplaintext(dec);
    paillier_freeciphertext(ctxt);

    return 0;
}