aes with esp32

AES (Advanced Encryption Standard) is a widely used symmetric encryption algorithm. It is commonly used for secure data transmission and storage.

To use AES with ESP32, you can utilize the ESP-IDF (Espressif IoT Development Framework) provided by Espressif Systems, the manufacturer of ESP32. ESP-IDF includes the mbedtls library, which supports AES encryption and decryption.

Here is a basic example of how you can use AES with ESP32 using the ESP-IDF:

1. Include the mbedtls library in your project:

   #include "mbedtls/aes.h"

2. Define a key and an initialization vector (IV):

   unsigned char key[16] = { /* your 128-bit key here */ };
   unsigned char iv[16] = { /* your 128-bit IV here */ };

3. Create an AES context and initialize it:

   mbedtls_aes_context aes;
   mbedtls_aes_init(&aes);

4. Set the encryption key and IV:

   mbedtls_aes_setkey_enc(&aes, key, 128);
   mbedtls_aes_set_iv(&aes, iv);

5. Encrypt or decrypt the data:

   unsigned char plaintext[16] = { /* your plaintext data here */ };
   unsigned char ciphertext[16];

   mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_ENCRYPT, plaintext, ciphertext);
   // or
   mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_DECRYPT, ciphertext, plaintext);

6. Clean up and free resources:

   mbedtls_aes_free(&aes);