Simple performance test of NaCl (requires CZMQ) - placed into the public domain

nacl_performance.c

//  Exploring functionality of NaCl

#include <czmq.h>
#include <crypto_box.h>
#include <crypto_secretbox.h>
#include <randombytes.h>

int main (void)
{
    //  Generate public+secret key pair
    byte public_key [crypto_box_PUBLICKEYBYTES];
    byte secret_key [crypto_box_SECRETKEYBYTES];
    int rc = crypto_box_keypair (public_key, secret_key);
    assert (rc == 0);
    
    byte precomputed [crypto_box_BEFORENMBYTES];
    rc == crypto_box_beforenm (precomputed, public_key, secret_key);
    assert (rc == 0);
    
    byte nonce [crypto_box_NONCEBYTES] = { 0 };
    byte plaintext [crypto_box_ZEROBYTES + 256];
    byte encrypted [crypto_box_ZEROBYTES + 256];
    memset (plaintext, 0, crypto_box_ZEROBYTES);
    memcpy (plaintext + crypto_box_ZEROBYTES, (byte *) "Hello World", 11);
    unsigned long long length = crypto_box_ZEROBYTES + 11;
    
    //  How often can we encrypt and decrypt in 1 second?
    int64_t end_at = zclock_time () + 1000;
    int iteration;
    int cycles = 0;
    end_at = zclock_time () + 1000;
    cycles = 0;
    while (true) {
        for (iteration = 0; iteration < 100; iteration++) {
            rc = crypto_box_afternm (encrypted, plaintext, length, nonce, precomputed);
            assert (rc == 0);
        }
        cycles += 100;
        if (zclock_time () >= end_at)
            break;
    }
    printf ("Encryptions: %d/second\n", cycles);

    end_at = zclock_time () + 1000;
    cycles = 0;
    while (true) {
        for (iteration = 0; iteration < 100; iteration++) {
            rc = crypto_box_open_afternm (plaintext, encrypted, length, nonce, precomputed);
            assert (rc == 0);
        }
        cycles += 100;
        if (zclock_time () >= end_at)
            break;
    }
    printf ("Decryptions: %d/second\n", cycles);

    return 0;
}