哪个网站可以做体育主播/优秀软文范例100字

加密步骤如下：

1）首先将数据按照8个字节一组进行分组得到D1D2......Dn（若数据不是8的整数倍，用指定的PADDING数据补位）

2）第一组数据D1与初始化向量I异或后的结果进行DES加密得到第一组密文C1（初始化向量I为全零）

3）第二组数据D2与第一组的加密结果C1异或以后的结果进行DES加密，得到第二组密文C2

4）之后的数据以此类推，得到Cn

5）按顺序连为C1C2C3......Cn即为加密结果。

3Des.h文件

 

#ifndef _3DES
#define _3DES
#include <strings.h>#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */unsigned char* GetKey(unsigned char *RandomData);void  DesEncrypt_ECB(unsigned char *key, unsigned char *data);unsigned char* DesEncrypt_CBC(unsigned char *key, unsigned char *data,int len);
#ifdef __cplusplus
};
#endif /* __cplusplus */
#endif /* defined(_3DES) */

3Des.cpp文件

 

 

#include "3DES.h"
#include "DES.h"
#include <iostream>
unsigned char* GetKey(unsigned char *RandomData){unsigned char* key=(unsigned char*)malloc(16);for (int i=0; i<16; i++) {key[i]=0xFF;}unsigned char RevertData[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};for (int i=0; i<sizeof(RevertData); i++) {RevertData[i]=~RandomData[i];}DesEncrypt_ECB(key, RandomData);DesEncrypt_ECB(key, RevertData);for (int i=0; i<16; i++) {if(i<8)key[i]=RandomData[i];elsekey[i]=RevertData[i-8];}return key;
}
void  DesEncrypt_ECB(unsigned char *key, unsigned char *data){DesEncrypt(key,data);DesDecrypt(key,data);DesEncrypt(key,data);}
unsigned char*  DesEncrypt_CBC(unsigned char *key, unsigned char *data, int len){unsigned char* data2=(unsigned char*)malloc(8);unsigned char data3[8];int sum=len/8+1;int yushu=len%8;for (int i=0;i<sum;i++) {for (int j=0; j<8; j++) {if(i<sum-1){data2[j]=data[i*8+j];if(j==7&&i==0){DesEncrypt(key, data2);for (int k=0; k<8; k++) {data3[k]=data2[k];}}else if(j==7&&i>0){for (int k=0; k<8; k++) {data2[k]^=data3[k];}DesEncrypt(key, data2);for (int k=0; k<8; k++) {data3[k]=data2[k];}}}else if(yushu==0&&i==sum-1&&j==7){data2[0]=0x80;for(int k=1;k<8;k++){data2[k]=0x00;}for (int k=0; k<8; k++) {data2[k]^=data3[k];}DesEncrypt(key, data2);}else if(yushu>0){if(j<yushu){data2[j]=data[i*8+j];}else if(j==yushu){data2[j]=0x80;}else if(j>yushu&&j!=7){data2[j]=0x00;}else if(j==7){data2[j]=0x00;for (int k=0; k<8; k++) {data2[k]^=data3[k];}DesEncrypt(key, data2);}}}}return data2;
}

main函数

 

 

unsigned char RandomData[16]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};unsigned char* key=GetKey(RandomData);unsigned char data[17]={0x14,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};unsigned char* macdata=DesEncrypt_CBC(key,data,sizeof(data));for (int i=0; i<8; i++) {printf("%x\n",macdata[i]);}free(macdata);free(key);