How can I use OpenSSL for encryption in C++11?

How can I use OpenSSL for encryption in C++11?

You can use the OpenSSL library to perform encryption in C++11 by including the necessary headers and linking against the OpenSSL libraries. Would you like a code example?

Yes, please provide a simple example of AES encryption.

Here's a basic example:

#include <openssl/aes.h>
#include <openssl/rand.h>

void encrypt(const unsigned char *key, const unsigned char *data, unsigned char *encrypted) {
    AES_KEY encryptKey;
    AES_set_encrypt_key(key, 128, &encryptKey);
    AES_encrypt(data, encrypted, &encryptKey);
}

This code sets up AES encryption with a 128-bit key. Do you need help with anything else?

How do I generate a random key for AES?

You can generate a random key using the RAND_bytes function from OpenSSL. Here's how:

unsigned char key[16]; // 128 bits
RAND_bytes(key, sizeof(key));

This will fill the key array with random bytes. Would you like to know more about key management?

Yes, what are the best practices for key management?

Best practices for key management include:

1. Use a secure key storage solution.
2. Rotate keys regularly.
3. Limit access to keys.
4. Use environment variables or secure vaults to store keys.

Let me know if you need more details on any of these!