scrypt_demo.cpp

#include <sodium.h>

#include <iostream>
#include <string>
#include <string.h>
using namespace std;

/*
 * reference:
 * https://download.libsodium.org/doc/password_hashing/index.html
 * https://download.libsodium.org/libsodium/releases/
 */

int main() {

  //进程启动时要调用一次
  sodium_init();

  char password[128] = {};
  for (int s = 0; s < 32; ++s) {
    password[s] = (randombytes_random()) % 26 + 'a';
  }
  sodium_mlock(&password[0], sizeof(password));

  cout << "test password is: " << password << endl;

  char hashed_password[crypto_pwhash_scryptsalsa208sha256_STRBYTES];

  if (crypto_pwhash_scryptsalsa208sha256_str(
          hashed_password, password, strlen(password),
          crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVE * 2,
          crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVE * 2) != 0) {
    cout << "scrypt faild, out of memory." << endl;
  } else {
    cout << "hash ok. insert hash result:\"" << hashed_password
         << "\" to your database." << endl;
  }

  if (crypto_pwhash_scryptsalsa208sha256_str_verify(hashed_password, password,
                                                    strlen(password)) == 0) {
    cout << "verify ok, correct password!" << endl;
  } else {
    cout << "verify failed, wrong password !" << endl;
  }

  sodium_munlock(&password[0], sizeof(password));

  return 0;
}