AES在openssl和mbedtls中的简单代码示例

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在openssl中：

// AES_test.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <stdio.h>#include <stdlib.h>#include <string.h>#include <openssl/aes.h>#include <time.h>#pragma comment(lib,"libeay32.lib")//FIXME  编译的时候 需要安装openssl环境，引用libcrypto//gcc -o test test_aes.c -lcrypto//测试加解密字符串 16字节一组int test_encrypt(){printf("enter test_encrypt\n");//密钥AES_KEY aes_key;//密钥数值unsigned char userKey[16] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x00};//明文空间//unsigned char plain[16] = "helloworld";unsigned char plain[1024] = {1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4};//解密后明文的空间//unsigned char dec_plain[16]={0}; unsigned char dec_plain[1024]={0};//密文空间//unsigned char cipher[16]={0};unsigned char cipher[1024]={0};int i = 0;//time_t nowTime;nowTime = time(NULL);  struct tm *sysTime = localtime(&nowTime);printf("系统时间：%d年%d月%d日%d时%d分\n", sysTime->tm_year+1900, sysTime->tm_mon+1, sysTime->tm_mday, sysTime->tm_hour, sysTime->tm_min);//system("pause");////设置加密用的密钥 userKey:密钥数值 aes_key:AES_KEY对象指针if(AES_set_encrypt_key(userKey, 128, &aes_key)<0){printf("设置密钥失败!!\n");return 0;}printf("\n*********** 加密前：%s\n", plain);//加密 in, out, key:AES密钥//AES_ecb_encrypt(plain, cipher, &aes_key, AES_ENCRYPT);for(i = 0; i < 64; i++){AES_ecb_encrypt(plain + (i*16), cipher + (i*16), &aes_key, AES_ENCRYPT);}printf("\n*********** 加密后：%s\n", cipher);//设置解密密钥 userKey:密钥数值 aes_key:AES_KEY对象指针if(AES_set_decrypt_key(userKey,128,&aes_key)<0){printf("设置解密密钥失败!!\n");return 0;}//解密 in, out, key:AES密钥 //AES_ecb_encrypt(cipher,dec_plain,&aes_key,AES_DECRYPT);for(i = 0; i < 64; i++){AES_ecb_encrypt(cipher + (i*16), dec_plain + (i*16), &aes_key, AES_DECRYPT);}printf("\n*********** 解密后：%s\n", dec_plain);printf("exit test_encrypt\n");return 0;}

在mbedtls中示例：

// mbedTLS_test_res.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "mbedtls/aes.h"int main(int argc, char *argv[]){   mbedtls_aes_context aes_ctx;   //密钥数值   unsigned char key[16] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x00};   //明文空间   unsigned char plain[16] = "helloworld";   //解密后明文的空间   unsigned char dec_plain[16]={0};   //密文空间   unsigned char cipher[16]={0};   mbedtls_aes_init( &aes_ctx );   //设置加密密钥   mbedtls_aes_setkey_enc( &aes_ctx, key, 128);   printf("\n*********** 加密前：%s\n", plain);   mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_ENCRYPT, plain, cipher );   printf("\n*********** 加密后：%s\n", cipher);   //设置解密密钥   mbedtls_aes_setkey_dec(&aes_ctx, key, 128);   mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_DECRYPT, cipher, dec_plain );   printf("\n*********** 解密后：%s\n", dec_plain);   mbedtls_aes_free( &aes_ctx );}

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