能移植在单片机上运行的256bit AES加解密算法-Can be transplanted in the microcontroller running 256bit AES encryption and decryption algorithm

GCC实现AES加解密，单片机可以调用其接口进行加解密。代码已调试通过。-GCC to achieve AES encryption and decryption, the microcontroller can call the interface for encryption and decryption. The code has been debugged.

Example of AES encrypt/decrypt data on stm32f407 microcontroller.