#include <stdlib.h>
#include <stdio.h>
#include <openssl/aes.h>

int
main()
{
	unsigned char userKey[32];
	AES_KEY key;
	unsigned char text[16];

	arc4random_buf(userKey, sizeof(userKey));
	printf("key: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
		"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		userKey[0], userKey[1], userKey[2], userKey[3], userKey[4], userKey[5], userKey[6], userKey[7],
		userKey[8], userKey[9], userKey[10], userKey[11], userKey[12], userKey[13], userKey[14], userKey[15],
		userKey[16], userKey[17], userKey[18], userKey[19], userKey[20], userKey[21], userKey[22], userKey[23],
		userKey[24], userKey[25], userKey[26], userKey[27], userKey[28], userKey[29], userKey[30], userKey[31]);
	AES_set_encrypt_key(userKey, 256, &key);

	arc4random_buf(text, sizeof(text));
	printf("plaintext: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		text[0], text[1], text[2], text[3], text[4], text[5], text[6], text[7],
		text[8], text[9], text[10], text[11], text[12], text[13], text[14], text[15]);
	AES_encrypt(text, text, &key);
	printf("ciphertext: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		text[0], text[1], text[2], text[3], text[4], text[5], text[6], text[7],
		text[8], text[9], text[10], text[11], text[12], text[13], text[14], text[15]);

	arc4random_buf(text, sizeof(text));
	printf("plaintext: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		text[0], text[1], text[2], text[3], text[4], text[5], text[6], text[7],
		text[8], text[9], text[10], text[11], text[12], text[13], text[14], text[15]);
	AES_encrypt(text, text, &key);
	printf("ciphertext: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		text[0], text[1], text[2], text[3], text[4], text[5], text[6], text[7],
		text[8], text[9], text[10], text[11], text[12], text[13], text[14], text[15]);

	return 0;
}