How can I hash passwords in C++11?

How can I hash passwords in C++11?

You can use libraries like OpenSSL or Crypto++ to hash passwords in C++11. Would you like a code example?

Yes, please provide a code example using OpenSSL.

Here's a simple example using OpenSSL:

#include <openssl/sha.h>
#include <iostream>
#include <iomanip>
#include <sstream>

std::string hashPassword(const std::string& password) {
    unsigned char hash[SHA256_DIGEST_LENGTH];
    SHA256(reinterpret_cast<const unsigned char*>(password.c_str()), password.size(), hash);
    std::stringstream ss;
    for (int i = 0; i < SHA256_DIGEST_LENGTH; ++i) {
        ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(hash[i]);
    }
    return ss.str();
}

int main() {
    std::string password = "my_secure_password";
    std::string hashed = hashPassword(password);
    std::cout << "Hashed password: " << hashed << std::endl;
    return 0;
}

This will give you a SHA-256 hash of the password.

What should I do to securely store the hashed passwords?

You should use a unique salt for each password, store the salt alongside the hash, and consider using a key derivation function like PBKDF2.