投稿
  1. 首页
  2. 软件运维

求des加密文件夹vc程序

余光中寻李白 • 2023-5-21 • 软件运维 • 阅读 6

求des加密文件夹vc程序,第1张

这个也太麻烦了。

给文件夹加密，我使用的是文件夹加密超级大师。

文件夹加密超级大师支持所有windows系统，可以加密文件夹，加密文件，保护磁盘和数据粉碎，使用起来非常方便。

在需要加密的文件和文件夹上单击鼠标右键选择加密就可以了。

解密时只要双击加密的文件夹和文件，输入正确的密码就可以解密。

文件夹加密超级大师加密后的文件和文件夹可以防止删除、复制和移动。

相对于其他的文件夹加密软件和文件加密软件，功能和性能还有 *** 作都更加的出色纯备。

并且有做告毁微软、360和金山的安全认证，是一款绝对安全的文件夹加密软件。

您可以到友稿百度上下载文件夹加密超级大师来给您的文件和文件夹加密，看看使用效果怎么样？

word文档加密，您可以下载文件夹加派腊密超级大师试试。

文件夹加密超级大师的主要功能有文件加密（保护文本，文档，电子表，图片，尘巧滑网页等内容），文件夹加密、隐藏、加锁，文件隐藏、粉碎等。可满足日常工作和生活中的安全保密需求，您宽戚尽可放心使用。

这是我们老师给的DES算法，肯定没问题，现在main()函数是空的，只要根据自己的需要将main（）函数再填充一下就能运行，可以对文件及文本明圆漏加密、解密,可能由于百度回答问题的文本框有些小，有些本来在同一行代码的可能分到了两行，如果有这种问题，自己再调一下吧腔型

#include <string.h>

#include "stdio.h"

#include "memory.h"

#include "time.h"

#include "stdlib.h"

#define PLAIN_FILE_OPEN_ERROR -1

#define KEY_FILE_OPEN_ERROR -2

#define CIPHER_FILE_OPEN_ERROR -3

#define OK 1

typedef char ElemType

/*初始置换表IP*/

int IP_Table[64] = { 57,49,41,33,25,17,9,1,

59,51,43,35,27,19,11,3,

61,53,45,37,29,21,13,5,

63,55,47,39,31,23,15,7,

56,48,40,32,24,16,8,0,

58,50,42,34,26,18,10,2,

60,52,44,36,28,20,12,4,

62,54,46,38,30,22,14,6}

/*逆初始置换表IP^-1*/

int IP_1_Table[64] = {39,7,47,15,55,23,63,31,

38,6,46,14,54,22,62,30,

37,5,45,13,53,21,61,29,

36,4,44,12,52,20,60,28,

35,3,43,11,51,19,59,27,

34,2,42,10,50,18,58,26,

33,1,41,9,49,17,57,25,

32,0,40,8,48,16,56,24}

/*扩充置换表E*/

int E_Table[48] = {31, 0, 1, 2, 3, 4,

3, 4, 5, 6, 7, 8,

7, 8,9,10,11,12,

11,12,13,14,15,16,

15,16,17,18,19,20,

19,20,21,22,23,24,

23,24,25,26,27,28,

27,28,29,30,31, 0}

/*置换函数P*/

int P_Table[32] = {15,6,19,20,28,11,27,16,

0,14,22,25,4,17,30,9,

1,7,23,13,31,26,2,8,

18,12,29,5,21,10,3,24}

/*S盒*/

int S[8][4][16] =

/激烂*S1*/

{{{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},

{0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},

{4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},

{15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}},

/*S2*/

{{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},

{3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},

{0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},

{13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}},

/*S3*/

{{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},

{13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},

{13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},

{1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}},

/*S4*/

{{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},

{13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},

{10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},

{3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}},

/*S5*/

{{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},

{14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},

{4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},

{11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}},

/*S6*/

{{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},

{10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},

{9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},

{4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}},

/*S7*/

{{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},

{13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},

{1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},

{6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}},

/*S8*/

{{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},

{1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},

{7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},

{2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}}

/*置换选择1*/

int PC_1[56] = {56,48,40,32,24,16,8,

0,57,49,41,33,25,17,

9,1,58,50,42,34,26,

18,10,2,59,51,43,35,

62,54,46,38,30,22,14,

6,61,53,45,37,29,21,

13,5,60,52,44,36,28,

20,12,4,27,19,11,3}

/*置换选择2*/

int PC_2[48] = {13,16,10,23,0,4,2,27,

14,5,20,9,22,18,11,3,

25,7,15,6,26,19,12,1,

40,51,30,36,46,54,29,39,

50,44,32,46,43,48,38,55,

33,52,45,41,49,35,28,31}

/*对左移次数的规定*/

int MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1}

int ByteToBit(ElemType ch,ElemType bit[8])

int BitToByte(ElemType bit[8],ElemType *ch)

int Char8ToBit64(ElemType ch[8],ElemType bit[64])

int Bit64ToChar8(ElemType bit[64],ElemType ch[8])

int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48])

int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56])

int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48])

int DES_ROL(ElemType data[56], int time)

int DES_IP_Transform(ElemType data[64])

int DES_IP_1_Transform(ElemType data[64])

int DES_E_Transform(ElemType data[48])

int DES_P_Transform(ElemType data[32])

int DES_SBOX(ElemType data[48])

int DES_XOR(ElemType R[48], ElemType L[48],int count)

int DES_Swap(ElemType left[32],ElemType right[32])

int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8])

int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48], ElemType plainBlock[8])

int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile)

int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile)

/*字节转换成二进制*/

int ByteToBit(ElemType ch, ElemType bit[8]){

int cnt

for(cnt = 0cnt <8cnt++){

*(bit+cnt) = (ch>>cnt)&1

}

return 0

}

/*二进制转换成字节*/

int BitToByte(ElemType bit[8],ElemType *ch){

int cnt

for(cnt = 0cnt <8cnt++){

*ch |= *(bit + cnt)<<cnt

}

return 0

}

/*将长度为8的字符串转为二进制位串*/

int Char8ToBit64(ElemType ch[8],ElemType bit[64]){

int cnt

for(cnt = 0cnt <8cnt++){

ByteToBit(*(ch+cnt),bit+(cnt<<3))

}

return 0

}

/*将二进制位串转为长度为8的字符串*/

int Bit64ToChar8(ElemType bit[64],ElemType ch[8]){

int cnt

memset(ch,0,8)

for(cnt = 0cnt <8cnt++){

BitToByte(bit+(cnt<<3),ch+cnt)

}

return 0

}

/*生成子密钥*/

int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){

ElemType temp[56]

int cnt

DES_PC1_Transform(key,temp)/*PC1置换*/

for(cnt = 0cnt <16cnt++){/*16轮跌代，产生16个子密钥*/

DES_ROL(temp,MOVE_TIMES[cnt])/*循环左移*/

DES_PC2_Transform(temp,subKeys[cnt])/*PC2置换，产生子密钥*/

}

return 0

}

/*密钥置换1*/

int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){

int cnt

for(cnt = 0cnt <56cnt++){

tempbts[cnt] = key[PC_1[cnt]]

}

return 0

}

/*密钥置换2*/

int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){

int cnt

for(cnt = 0cnt <48cnt++){

tempbts[cnt] = key[PC_2[cnt]]

}

return 0

}

/*循环左移*/

int DES_ROL(ElemType data[56], int time){

ElemType temp[56]

/*保存将要循环移动到右边的位*/

memcpy(temp,data,time)

memcpy(temp+time,data+28,time)

/*前28位移动*/

memcpy(data,data+time,28-time)

memcpy(data+28-time,temp,time)

/*后28位移动*/

memcpy(data+28,data+28+time,28-time)

memcpy(data+56-time,temp+time,time)

return 0

}

/*IP置换*/

int DES_IP_Transform(ElemType data[64]){

int cnt

ElemType temp[64]

for(cnt = 0cnt <64cnt++){

temp[cnt] = data[IP_Table[cnt]]

}

memcpy(data,temp,64)

return 0

}

/*IP逆置换*/

int DES_IP_1_Transform(ElemType data[64]){

int cnt

ElemType temp[64]

for(cnt = 0cnt <64cnt++){

temp[cnt] = data[IP_1_Table[cnt]]

}

memcpy(data,temp,64)

return 0

}

/*扩展置换*/

int DES_E_Transform(ElemType data[48]){

int cnt

ElemType temp[48]

for(cnt = 0cnt <48cnt++){

temp[cnt] = data[E_Table[cnt]]

}

memcpy(data,temp,48)

return 0

}

/*P置换*/

int DES_P_Transform(ElemType data[32]){

int cnt

ElemType temp[32]

for(cnt = 0cnt <32cnt++){

temp[cnt] = data[P_Table[cnt]]

}

memcpy(data,temp,32)

return 0

}

/*异或*/

int DES_XOR(ElemType R[48], ElemType L[48] ,int count){

int cnt

for(cnt = 0cnt <countcnt++){

R[cnt] ^= L[cnt]

}

return 0

}

/*S盒置换*/

int DES_SBOX(ElemType data[48]){

int cnt

int line,row,output

int cur1,cur2

for(cnt = 0cnt <8cnt++){

cur1 = cnt*6

cur2 = cnt<<2

/*计算在S盒中的行与列*/

line = (data[cur1]<<1) + data[cur1+5]

row = (data[cur1+1]<<3) + (data[cur1+2]<<2)

+ (data[cur1+3]<<1) + data[cur1+4]

output = S[cnt][line][row]

/*化为2进制*/

data[cur2] = (output&0X08)>>3

data[cur2+1] = (output&0X04)>>2

data[cur2+2] = (output&0X02)>>1

data[cur2+3] = output&0x01

}

return 0

}

/*交换*/

int DES_Swap(ElemType left[32], ElemType right[32]){

ElemType temp[32]

memcpy(temp,left,32)

memcpy(left,right,32)

memcpy(right,temp,32)

return 0

}

/*加密单个分组*/

int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]){

ElemType plainBits[64]

ElemType copyRight[48]

int cnt

Char8ToBit64(plainBlock,plainBits)

/*初始置换（IP置换）*/

DES_IP_Transform(plainBits)

/*16轮迭代*/

for(cnt = 0cnt <16cnt++){

memcpy(copyRight,plainBits+32,32)

/*将右半部分进行扩展置换，从32位扩展到48位*/

DES_E_Transform(copyRight)

/*将右半部分与子密钥进行异或 *** 作*/

DES_XOR(copyRight,subKeys[cnt],48)

/*异或结果进入S盒，输出32位结果*/

DES_SBOX(copyRight)

/*P置换*/

DES_P_Transform(copyRight)

/*将明文左半部分与右半部分进行异或*/

DES_XOR(plainBits,copyRight,32)

if(cnt != 15){

/*最终完成左右部的交换*/

DES_Swap(plainBits,plainBits+32)

}

}

/*逆初始置换（IP^1置换）*/

DES_IP_1_Transform(plainBits)

Bit64ToChar8(plainBits,cipherBlock)

return 0

}

/*解密单个分组*/

int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48],ElemType plainBlock[8]){

ElemType cipherBits[64]

ElemType copyRight[48]

int cnt

Char8ToBit64(cipherBlock,cipherBits)

/*初始置换（IP置换）*/

DES_IP_Transform(cipherBits)

/*16轮迭代*/

for(cnt = 15cnt >= 0cnt--){

memcpy(copyRight,cipherBits+32,32)

/*将右半部分进行扩展置换，从32位扩展到48位*/

DES_E_Transform(copyRight)

/*将右半部分与子密钥进行异或 *** 作*/

DES_XOR(copyRight,subKeys[cnt],48)

/*异或结果进入S盒，输出32位结果*/

DES_SBOX(copyRight)

/*P置换*/

DES_P_Transform(copyRight)

/*将明文左半部分与右半部分进行异或*/

DES_XOR(cipherBits,copyRight,32)

if(cnt != 0){

/*最终完成左右部的交换*/

DES_Swap(cipherBits,cipherBits+32)

}

}

/*逆初始置换（IP^1置换）*/

DES_IP_1_Transform(cipherBits)

Bit64ToChar8(cipherBits,plainBlock)

return 0

}

/*加密文本字符数组*/

int DES_Encrypt(char *plainText, int datalen,char *keyStr,char *cipherText){

int count = datalen

int icount = count

if ((count % 8) != 0)

icount = count+(8-(count % 8))

ElemType plainBlock[8],cipherBlock[8],keyBlock[8]

ElemType bKey[64]

ElemType subKeys[16][48]

/*设置密钥*/

memcpy(keyBlock,keyStr,8)

/*将密钥转换为二进制流*/

Char8ToBit64(keyBlock,bKey)

/*生成子密钥*/

DES_MakeSubKeys(bKey,subKeys)

char *pdata = plainText

while(count>=8){

/*每次读8个字节，并返回成功读取的字节数*/

memcpy(plainBlock,pdata,8)

DES_EncryptBlock(plainBlock,subKeys,cipherBlock)

memcpy(cipherText,cipherBlock,8)

cipherText += 8

pdata += 8

count -= 8

}

if(count){

/*填充*/

memcpy(plainBlock,pdata,count)

memset(plainBlock + count,'\0',7 - count)

/*最后一个字符保存包括最后一个字符在内的所填充的字符数量*/

plainBlock[7] = 8 - count

DES_EncryptBlock(plainBlock,subKeys,cipherBlock)

memcpy(cipherText,cipherBlock,8)

}

return icount

}

/*加密文件*/

int DES_Encrypt_File(char *plainFile, char *keyStr,char *cipherFile){

FILE *plain,*cipher

int count

ElemType plainBlock[8],cipherBlock[8],keyBlock[8]

ElemType bKey[64]

ElemType subKeys[16][48]

if((plain = fopen(plainFile,"rb")) == NULL){

return PLAIN_FILE_OPEN_ERROR

}

if((cipher = fopen(cipherFile,"wb")) == NULL){

return CIPHER_FILE_OPEN_ERROR

}

/*设置密钥*/

memcpy(keyBlock,keyStr,8)

/*将密钥转换为二进制流*/

Char8ToBit64(keyBlock,bKey)

/*生成子密钥*/

DES_MakeSubKeys(bKey,subKeys)

while(!feof(plain)){

/*每次读8个字节，并返回成功读取的字节数*/

if((count = fread(plainBlock,sizeof(char),8,plain)) == 8){

DES_EncryptBlock(plainBlock,subKeys,cipherBlock)

fwrite(cipherBlock,sizeof(char),8,cipher)

}

}

if(count){

/*填充*/

memset(plainBlock + count,'\0',7 - count)

/*最后一个字符保存包括最后一个字符在内的所填充的字符数量*/

plainBlock[7] = 8 - count

DES_EncryptBlock(plainBlock,subKeys,cipherBlock)

fwrite(cipherBlock,sizeof(char),8,cipher)

}

fclose(plain)

fclose(cipher)

return OK

}

/*解密文本字符数组*/

int DES_Decrypt(char *cipherText, int &cipherlen,char *keyStr,char **plainText){

int count = 0

int times = 0

ElemType plainBlock[8],cipherBlock[8],keyBlock[8]

ElemType bKey[64]

ElemType subKeys[16][48]

/*设置密钥*/

memcpy(keyBlock,keyStr,8)

/*将密钥转换为二进制流*/

Char8ToBit64(keyBlock,bKey)

/*生成子密钥*/

DES_MakeSubKeys(bKey,subKeys)

*plainText = new char[cipherlen+1]

memset(*plainText,0,cipherlen+1)

char *pdata = *plainText

while(1){

/*密文的字节数一定是8的整数倍*/

memcpy(cipherBlock,cipherText,8)

DES_DecryptBlock(cipherBlock,subKeys,plainBlock)

times += 8

if(times <cipherlen){

memcpy(pdata,plainBlock,8)

pdata = pdata + 8

cipherText += 8

}

else{

break

}

}

/*判断末尾是否被填充*/

if(plainBlock[7] <8){

for(count = 8 - plainBlock[7]count <7count++){

if(plainBlock[count] != '\0'){

break

}

}

}

if(count == 7){/*有填充*/

cipherlen -= plainBlock[7]

memcpy(pdata,plainBlock,8 - plainBlock[7])

}

else{/*无填充*/

memcpy(pdata,plainBlock,8)

}

return OK

}

/*解密文件*/

int DES_Decrypt_File(char *cipherFile, char *keyStr,char *plainFile){

FILE *plain, *cipher

int count,times = 0

long fileLen

ElemType plainBlock[8],cipherBlock[8],keyBlock[8]

ElemType bKey[64]

ElemType subKeys[16][48]

if((cipher = fopen(cipherFile,"rb")) == NULL){

return CIPHER_FILE_OPEN_ERROR

}

if((plain = fopen(plainFile,"wb")) == NULL){

return PLAIN_FILE_OPEN_ERROR

}

/*设置密钥*/

memcpy(keyBlock,keyStr,8)

/*将密钥转换为二进制流*/

Char8ToBit64(keyBlock,bKey)

/*生成子密钥*/

DES_MakeSubKeys(bKey,subKeys)

/*取文件长度 */

fseek(cipher,0,SEEK_END)/*将文件指针置尾*/

fileLen = ftell(cipher)/*取文件指针当前位置*/

rewind(cipher)/*将文件指针重指向文件头*/

while(1){

/*密文的字节数一定是8的整数倍*/

fread(cipherBlock,sizeof(char),8,cipher)

DES_DecryptBlock(cipherBlock,subKeys,plainBlock)

times += 8

if(times <fileLen){

fwrite(plainBlock,sizeof(char),8,plain)

}

else{

break

}

}

/*判断末尾是否被填充*/

if(plainBlock[7] <8){

for(count = 8 - plainBlock[7]count <7count++){

if(plainBlock[count] != '\0'){

break

}

}

}

if(count == 7){/*有填充*/

fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain)

}

else{/*无填充*/

fwrite(plainBlock,sizeof(char),8,plain)

}

fclose(plain)

fclose(cipher)

return OK

}

void main()

{

}

欢迎分享，转载请注明来源：内存溢出

原文地址: http://outofmemory.cn/yw/12216833.html

赞 (0)
打赏 微信扫一扫 微信扫一扫 支付宝扫一扫 支付宝扫一扫
余光中寻李白 余光中寻李白 一级用户组
0 0
上一篇 2023-05-21
下一篇 2023-05-21

发表评论

登录后才能评论

评论列表（0条）

保存