Here's an updated version of the script with a few changes:
Added comments to improve readability and understanding of the code.
Changed typedef struct to typedef struct aes_context to make it clearer that this struct is specific to AES.
Added a header guard to prevent multiple includes of the same file.
Used stdint.h to define uint8 and uint32 types instead of using #define.
Changed unsigned long int to uint32_t for portability and consistency.
Added const qualifier to the input parameter of aes_encrypt and aes_decrypt functions since they do not modify the input.
Here's an updated version of the script with a few changes:
Added comments to improve readability and understanding of the code. Changed typedef struct to typedef struct aes_context to make it clearer that this struct is specific to AES. Added a header guard to prevent multiple includes of the same file. Used stdint.h to define uint8 and uint32 types instead of using #define. Changed unsigned long int to uint32_t for portability and consistency. Added const qualifier to the input parameter of aes_encrypt and aes_decrypt functions since they do not modify the input.
ifndef AES_H
define AES_H
include
/ AES context structure / typedef struct aes_context { uint32_t erk[64]; / encryption round keys / uint32_t drk[64]; / decryption round keys / int nr; / number of rounds / } aes_context;
/ Set AES key / int aes_set_key(aes_context ctx, const uint8_t key, int nbits);
/ Encrypt a block of plaintext / void aes_encrypt(const aes_context *ctx, const uint8_t input[16], uint8_t output[16]);
/ Decrypt a block of ciphertext / void aes_decrypt(const aes_context *ctx, const uint8_t input[16], uint8_t output[16]);
endif / AES_H /