openssl AES加密

此代码不涉及ECB和CBC等关联加密

#include <stdio.h>  #include <string.h>  #include <stdlib.h> #include <openssl/aes.h>#include <openssl/applink.c>  #pragma comment(lib, "libeay32.lib")  #pragma comment(lib, "ssleay32.lib") int main (){//aes是块加密,每块16Byte(128bit)char input[] = "0000000000000000";unsigned char output[256];unsigned  char decode[64];//密钥，长度可选3种128bit，192bit，256bit，不管密钥长度多长加密出来的结果都是128bit//这里用的是128bit的密钥长度char userKey[]="1234567890123456";AES_KEY key;AES_set_encrypt_key((unsigned char*)userKey, 128, &key);//构造加密密钥AES_encrypt((unsigned char *)input, output, &key);//30303030303030303030303030303030 加密结果: 93bc0fabf6c85e9e1c53d78885373dc7AES_encrypt((unsigned char *)input,output,&key);AES_set_decrypt_key((unsigned char*)userKey, 128, &key);//构造解密密钥AES_decrypt(output,decode,&key);return 0;}