 AES.H  AES.C  

 AES.H
#define AES256MODE  //ʾ256λģʽ  Ϊ128Ϊģʽ


AES_Encrypt(expressText  , cipherText , aesKey); //ܺ 
expressText 16λ
cipherText  ܺ 16λ
aesKey   16λ

AES_Decrypt(expressText  , cipherText , aesKey);//ܺ
expressText ܺ16λ
cipherText   16λ
aesKey   16λ

KEIL Żȼѡ level3      optimize for time

128λ       ܺʱ90US   ܺʱ165us
256λ   125us      210us