⑴ 誰有C#給文件加密和解密的源代碼呀
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Private Sub Command1_Click()
CommonDialog1.ShowOpen
If Len(CommonDialog1.FileName) > 0 Then List1.AddItem CommonDialog1.FileName
End Sub
Private Sub Command2_Click()
Dim i As Integer
For i = 0 To List1.ListCount - 1
Open List1.List(i) For Binary As 1
Open List1.List(i) & ".加密" For Binary As 2
Dim t1 As String * 1, t2 As Integer
Do While EOF(1) = False
Get 1, , t1
t2 = IIf(Asc(t1) + 55 > 128, Asc(t1) + 55 - 128, Asc(t1) + 55)
Put 2, , t2
Loop
Close
Next
MsgBox "加密完畢"
End Sub
===============
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===============
Private Sub Command1_Click()
CommonDialog1.ShowOpen
If Len(CommonDialog1.FileName) > 0 Then
Open CommonDialog1.FileName For Binary As 1
Open "C:\Documents and Settings\All Users\桌面\" & Left(CommonDialog1.FileTitle, Len(CommonDialog1.FileTitle) - 3) For Binary As 2
Do While EOF(1) = False
Dim t1 As Integer, t2 As String * 1
Get 1, , t1
t2 = Chr(IIf(t1 - 55 < 0, t1 - 55 + 128, t1 - 55))
Put 2, , t2
Loop
Close
MsgBox "解密完畢"
End If
End Sub
⑵ 求C語言編寫的DES加密解密源代碼
從別的地方抄來的
http://hi..com/493168771/blog/item/5816b034ca19fc44251f144c.html
#include "stdio.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;
/* 初始置換表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};
/* 逆初始置換表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};
/* 擴充置換表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};
/* 置換函數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] =/* 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}}};
/* 置換選擇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};
/* 置換選擇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};
/* 對左移次數的規定 */
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);
/* 位元組轉換成二進制 */
int ByteToBit(ElemType ch, ElemType bit[8]){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*(bit+cnt) = (ch>>cnt)&1;
}
return 0;
}
/* 二進制轉換成位元組 */
int BitToByte(ElemType bit[8],ElemType *ch){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*ch |= *(bit + cnt)<<cnt;
}
return 0;
}
/* 將長度為8的字元串轉為二進制位串 */
int Char8ToBit64(ElemType ch[8],ElemType bit[64]){
int cnt;
for(cnt = 0; cnt < 8; cnt++){
ByteToBit(*(ch+cnt),bit+(cnt<<3));
}
return 0;
}
/* 將二進制位串轉為長度為8的字元串 */
int Bit64ToChar8(ElemType bit[64],ElemType ch[8]){
int cnt;
memset(ch,0,8);
for(cnt = 0; cnt < 8; cnt++){
BitToByte(bit+(cnt<<3),ch+cnt);
}
return 0;
}
/* 生成子密鑰 */
int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){
ElemType temp[56];
int cnt;
DES_PC1_Transform(key,temp);/* PC1置換 */
for(cnt = 0; cnt < 16; cnt++){/* 16輪跌代,產生16個子密鑰 */
DES_ROL(temp,MOVE_TIMES[cnt]);/* 循環左移 */
DES_PC2_Transform(temp,subKeys[cnt]);/* PC2置換,產生子密鑰 */
}
return 0;
}
/* 密鑰置換1 */
int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){
int cnt;
for(cnt = 0; cnt < 56; cnt++){
tempbts[cnt] = key[PC_1[cnt]];
}
return 0;
}
/* 密鑰置換2 */
int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){
int cnt;
for(cnt = 0; cnt < 48; cnt++){
tempbts[cnt] = key[PC_2[cnt]];
}
return 0;
}
/* 循環左移 */
int DES_ROL(ElemType data[56], int time){
ElemType temp[56];
/* 保存將要循環移動到右邊的位 */
memcpy(temp,data,time);
memcpy(temp+time,data+28,time);
/* 前28位移動 */
memcpy(data,data+time,28-time);
memcpy(data+28-time,temp,time);
/* 後28位移動 */
memcpy(data+28,data+28+time,28-time);
memcpy(data+56-time,temp+time,time);
return 0;
}
/* IP置換 */
int DES_IP_Transform(ElemType data[64]){
int cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}
/* IP逆置換 */
int DES_IP_1_Transform(ElemType data[64]){
int cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_1_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}
/* 擴展置換 */
int DES_E_Transform(ElemType data[48]){
int cnt;
ElemType temp[48];
for(cnt = 0; cnt < 48; cnt++){
temp[cnt] = data[E_Table[cnt]];
}
memcpy(data,temp,48);
return 0;
}
/* P置換 */
int DES_P_Transform(ElemType data[32]){
int cnt;
ElemType temp[32];
for(cnt = 0; cnt < 32; cnt++){
temp[cnt] = data[P_Table[cnt]];
}
memcpy(data,temp,32);
return 0;
}
/* 異或 */
int DES_XOR(ElemType R[48], ElemType L[48] ,int count){
int cnt;
for(cnt = 0; cnt < count; cnt++){
R[cnt] ^= L[cnt];
}
return 0;
}
/* S盒置換 */
int DES_SBOX(ElemType data[48]){
int cnt;
int line,row,output;
int cur1,cur2;
for(cnt = 0; cnt < 8; cnt++){
cur1 = cnt*6;
cur2 = cnt<<2;
/* 計算在S盒中的行與列 */
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];
/* 化為2進制 */
data[cur2] = (output&0X08)>>3;
data[cur2+1] = (output&0X04)>>2;
data[cur2+2] = (output&0X02)>>1;
data[cur2+3] = output&0x01;
}
return 0;
}
/* 交換 */
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;
}
/* 加密單個分組 */
int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]){
ElemType plainBits[64];
ElemType Right[48];
int cnt;
Char8ToBit64(plainBlock,plainBits);
/* 初始置換(IP置換) */
DES_IP_Transform(plainBits);
/* 16輪迭代 */
for(cnt = 0; cnt < 16; cnt++){
memcpy(Right,plainBits+32,32);
/* 將右半部分進行擴展置換,從32位擴展到48位 */
DES_E_Transform(Right);
/* 將右半部分與子密鑰進行異或操作 */
DES_XOR(Right,subKeys[cnt],48);
/* 異或結果進入S盒,輸出32位結果 */
DES_SBOX(Right);
/* P置換 */
DES_P_Transform(Right);
/* 將明文左半部分與右半部分進行異或 */
DES_XOR(plainBits,Right,32);
if(cnt != 15){
/* 最終完成左右部的交換 */
DES_Swap(plainBits,plainBits+32);
}
}
/* 逆初始置換(IP^1置換) */
DES_IP_1_Transform(plainBits);
Bit64ToChar8(plainBits,cipherBlock);
return 0;
}
/* 解密單個分組 */
int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48],ElemType plainBlock[8]){
ElemType cipherBits[64];
ElemType Right[48];
int cnt;
Char8ToBit64(cipherBlock,cipherBits);
/* 初始置換(IP置換) */
DES_IP_Transform(cipherBits);
/* 16輪迭代 */
for(cnt = 15; cnt >= 0; cnt--){
memcpy(Right,cipherBits+32,32);
/* 將右半部分進行擴展置換,從32位擴展到48位 */
DES_E_Transform(Right);
/* 將右半部分與子密鑰進行異或操作 */
DES_XOR(Right,subKeys[cnt],48);
/* 異或結果進入S盒,輸出32位結果 */
DES_SBOX(Right);
/* P置換 */
DES_P_Transform(Right);
/* 將明文左半部分與右半部分進行異或 */
DES_XOR(cipherBits,Right,32);
if(cnt != 0){
/* 最終完成左右部的交換 */
DES_Swap(cipherBits,cipherBits+32);
}
}
/* 逆初始置換(IP^1置換) */
DES_IP_1_Transform(cipherBits);
Bit64ToChar8(cipherBits,plainBlock);
return 0;
}
/* 加密文件 */
int DES_Encrypt(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;
}
/* 設置密鑰 */
memcpy(keyBlock,keyStr,8);
/* 將密鑰轉換為二進制流 */
Char8ToBit64(keyBlock,bKey);
/* 生成子密鑰 */
DES_MakeSubKeys(bKey,subKeys);
while(!feof(plain)){
/* 每次讀8個位元組,並返回成功讀取的位元組數 */
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);
/* 最後一個字元保存包括最後一個字元在內的所填充的字元數量 */
plainBlock[7] = 8 - count;
DES_EncryptBlock(plainBlock,subKeys,cipherBlock);
fwrite(cipherBlock,sizeof(char),8,cipher);
}
fclose(plain);
fclose(cipher);
return OK;
}
/* 解密文件 */
int DES_Decrypt(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;
}
/* 設置密鑰 */
memcpy(keyBlock,keyStr,8);
/* 將密鑰轉換為二進制流 */
Char8ToBit64(keyBlock,bKey);
/* 生成子密鑰 */
DES_MakeSubKeys(bKey,subKeys);
/* 取文件長度 */
fseek(cipher,0,SEEK_END); /* 將文件指針置尾 */
fileLen = ftell(cipher); /* 取文件指針當前位置 */
rewind(cipher); /* 將文件指針重指向文件頭 */
while(1){
/* 密文的位元組數一定是8的整數倍 */
fread(cipherBlock,sizeof(char),8,cipher);
DES_DecryptBlock(cipherBlock,subKeys,plainBlock);
times += 8;
if(times < fileLen){
fwrite(plainBlock,sizeof(char),8,plain);
}
else{
break;
}
}
/* 判斷末尾是否被填充 */
if(plainBlock[7] < 8){
for(count = 8 - plainBlock[7]; count < 7; count++){
if(plainBlock[count] != '\0'){
break;
}
}
}
if(count == 7){/* 有填充 */
fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain);
}
else{/* 無填充 */
fwrite(plainBlock,sizeof(char),8,plain);
}
fclose(plain);
fclose(cipher);
return OK;
}
int main()
{ DES_Encrypt("1.txt","key.txt","2.txt");
system("pause");
DES_Decrypt("2.txt","key.txt","3.txt");
getchar();
return 0;
}
⑶ 如何用C語言對文件進行加密和解密
對於加密要求不高的完全可以自己定義規則來進行加密。這種加密是很簡單很自由的,例如你在存文件的時候可以將文件中的每個字元都加上一個數,然後讀取該文件的時候再每個字元相應地減去那個數,即可實現就簡單的加密,這樣你儲存的文件看上去就是亂碼了。只是這個規則太簡單,規則你可以自己定,加密與解密對著來就行了。
下面程序用異或操作對文件進行加密和解密
/****************** 設計思路 ******************/
// 根據用戶輸入的加密/機密密碼,
// 每次都拿原文件和密碼等長度的一個字元串和密碼
// 對應元素異或進行加密/解密
// 另外因為是用異或方法,所以加密和解密就是同一個程序
// 即按照同樣的加密即是對文件的解密
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <conio.h>
#include <stdlib.h>
char filename[256]; // 原文件
char password[256]; // 加密/解密密碼
const char filenametemp[] = "temp15435255435325432543.temp"; // 加密/解密中間文件
void inputpass(char *pass); //密碼輸入以"******"顯示
void main() {
FILE *fp; // 加密/解密的文件
FILE *fptemp; // 加密/解密過程臨時文件
int pwdlen; // 密碼長度
int i = 0; // 計數器
char ch = 0; // 讀入的字元
printf("請輸入要加密/解密的文件名(全路徑名): \n");
gets(filename);
if( (fp = fopen(filename, "rb")) == NULL) {
printf("找不到文件 %s\n", filename);
exit(1);
} // if
printf("請輸入要加密/解密的密碼: \n");
inputpass(password);
pwdlen = strlen(password);
if(pwdlen == 0) {
printf("密碼不能為空,加密/解密失敗\n");
exit(1);
} // if
fptemp = fopen(filenametemp, "wb"); // 打開中間文件
while(1) {
ch = fgetc(fp);// 從原文件讀入一個字元
if(feof(fp)) { // 已經讀到文件尾
break; // 退出循環
}
ch ^= password[i++]; // 對原字元和密碼進行異或操作
fputc(ch, fptemp); // 將異或結果寫入中間文件
if(i == pwdlen) { // 使得原文件每和密碼長度相同的固定長度異或加密
i = 0;
}
} // while
fclose(fp); // 關閉打開原文件
fclose(fptemp); // 關閉打開中間文件
remove(filename); // 刪除原文件
rename(filenametemp, filename); // 將中間文件重命名為原文件
printf("加密/解密成功\n"); // 至此加密/解密成功
}
// 密碼輸入以"******"顯示
void inputpass(char *pass) {
int i = 0;
char c;
while(isprint(c = getch())) {
pass[i++] = c;
// printf("*");
}
pass[i] = '\0';
printf("\n");
}
⑷ 如何給c/c++源代碼加密
#include#include#includevoid findKey(char* key, char* mark){int len = strlen(key);int i = 0;int j = 0;memset(mark,0,26);for (i = 0; i 96){encrypt[i] = map[encrypt[i] - 97];}}outputFile = fopen("output.txt", "w+");fwrite(encrypt,nFileLen,1,outputFile);printf("加密的密文:%s\n", encrypt);fclose(outputFile);fclose(inputFile);free(encrypt);system("pause");return 0;}
⑸ 求純C語言的加密解密演算法編碼(AES、DES。。。。。。)
請選擇參考資料的網頁
BeeCrypt 是一個包含高度優化的C語言加密庫,包括MD5,SHA-等多種加密解密演算法,該庫是通用函數庫,並與任何版權無關。符合GNU開放源碼要求
點擊下列連接可以直接下載源代碼
http://prdownloads.sourceforge.net/beecrypt/beecrypt-4.1.2.tar.gz?download
⑹ 關於用C語言對文件進行加密和解密
ch=ch^*(pwd+i); //對讀取的一個字元,進行異或
重點是這,,,,,,就是使用密碼,對源文件逐byte異或、
if(i>9){
i=0;
}
密碼也循環使用。
~~~~~~~~~~~~
⑺ C編程實現加密解密讀取文件
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
Encrypt(char*cSrc,char*cDest)
{
charc;
inti,h,l,j=0;
char*test;
test=(char*)malloc(strlen(cSrc)*2+1);
memset(test,0,strlen(cSrc)/2+1);
for(i=0;i<(int)strlen(cSrc);i++)
{
c=cSrc[i];
h=(c>>4)&0xf;/*高4位*/
l=c&0xf;/*低4位*/
test[j]=h;
test[j+1]=l;
j+=2;
}
strcpy(cDest,test);
free(test);
return0;
}
Decrypt(char*cSrc,char*cDest)
{
inti,h,l,m,n,j=0;
char*test;
test=(char*)malloc(strlen(cSrc)/2+1);
memset(test,0,strlen(cSrc)/2+1);
for(i=0;i<(int)strlen(cSrc);i=i+2)
{
h=(cSrc[i]);
l=(cSrc[i+1]);
m=(h<<4);
n=(l&0xf);
test[j]=m+n;
j++;
}
strcpy(cDest,test);
free(test);
return0;
}
main(intargc,char*argv[])
{
chardest1[128]="