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void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}
#pragma comment(lib, "crypt32.lib")
#pragma comment(lib, "advapi32.lib")
#define _WIN32_WINNT 0x0400
#include <stdio.h>
#include <windows.h>
#include <wincrypt.h>
#define KEYLENGTH 0x00800000
void HandleError(char *s);
//--------------------------------------------------------------------
// These additional #define statements are required.
#define ENCRYPT_ALGORITHM CALG_RC4
#define ENCRYPT_BLOCK_SIZE 8
// Declare the function EncryptFile. The function definition
// follows main.
BOOL EncryptFile(
PCHAR szSource,
PCHAR szDestination,
PCHAR szPassword);
//--------------------------------------------------------------------
// Begin main.
void main(void) {
CHAR szSource[100];
CHAR szDestination[100];
CHAR szPassword[100];
printf("Encrypt a file. \n\n");
printf("Enter the name of the file to be encrypted: ");
scanf("%s",szSource);
printf("Enter the name of the output file: ");
scanf("%s",szDestination);
printf("Enter the password:");
scanf("%s",szPassword);
//--------------------------------------------------------------------
// Call EncryptFile to do the actual encryption.
if(EncryptFile(szSource, szDestination, szPassword)) {
printf("Encryption of the file %s was a success. \n", szSource);
printf("The encrypted data is in file %s.\n",szDestination);
} else {
HandleError("Error encrypting file!");
}
} // End of main
//--------------------------------------------------------------------
// Code for the function EncryptFile called by main.
static BOOL EncryptFile(
PCHAR szSource,
PCHAR szDestination,
PCHAR szPassword)
//--------------------------------------------------------------------
// Parameters passed are:
// szSource, the name of the input, a plaintext file.
// szDestination, the name of the output, an encrypted file to be
// created.
// szPassword, the password.
{
//--------------------------------------------------------------------
// Declare and initialize local variables.
FILE *hSource;
FILE *hDestination;
HCRYPTPROV hCryptProv;
HCRYPTKEY hKey;
HCRYPTHASH hHash;
PBYTE pbBuffer;
DWORD dwBlockLen;
DWORD dwBufferLen;
DWORD dwCount;
//--------------------------------------------------------------------
// Open source file.
if(hSource = fopen(szSource,"rb")) {
printf("The source plaintext file, %s, is open. \n", szSource);
} else {
HandleError("Error opening source plaintext file!");
}
//--------------------------------------------------------------------
// Open destination file.
if(hDestination = fopen(szDestination,"wb")) {
printf("Destination file %s is open. \n", szDestination);
} else {
HandleError("Error opening destination ciphertext file!");
}
//以下获得一个CSP句柄
if(CryptAcquireContext(
&hCryptProv,
NULL, //NULL表示使用默认密钥容器,默认密钥容器名
//为用户登陆名
NULL,
PROV_RSA_FULL,
0)) {
printf("A cryptographic provider has been acquired. \n");
} else {
if(CryptAcquireContext(
&hCryptProv,
NULL,
NULL,
PROV_RSA_FULL,
CRYPT_NEWKEYSET))//创建密钥容器
{
//创建密钥容器成功,并得到CSP句柄
printf("A new key container has been created.\n");
} else {
HandleError("Could not create a new key container.\n");
}
}
//--------------------------------------------------------------------
// 创建一个会话密钥(session key)
// 会话密钥也叫对称密钥,用于对称加密算法。
// (注: 一个Session是指从调用函数CryptAcquireContext到调用函数
// CryptReleaseContext 期间的阶段。会话密钥只能存在于一个会话过程)
//--------------------------------------------------------------------
// Create a hash object.
if(CryptCreateHash(
hCryptProv,
CALG_MD5,
0,
0,
&hHash)) {
printf("A hash object has been created. \n");
} else {
HandleError("Error during CryptCreateHash!\n");
}
//--------------------------------------------------------------------
// 用输入的密码产生一个散列
if(CryptHashData(
hHash,
(BYTE *)szPassword,
strlen(szPassword),
0)) {
printf("The password has been added to the hash. \n");
} else {
HandleError("Error during CryptHashData. \n");
}
//--------------------------------------------------------------------
// 通过散列生成会话密钥
if(CryptDeriveKey(
hCryptProv,
ENCRYPT_ALGORITHM,
hHash,
KEYLENGTH,
&hKey)) {
printf("An encryption key is derived from the password hash. \n");
} else {
HandleError("Error during CryptDeriveKey!\n");
}
//--------------------------------------------------------------------
// Destroy the hash object.
CryptDestroyHash(hHash);
hHash = NULL;
//--------------------------------------------------------------------
// The session key is now ready.
//--------------------------------------------------------------------
// 因为加密算法是按ENCRYPT_BLOCK_SIZE 大小的块加密的,所以被加密的
// 数据长度必须是ENCRYPT_BLOCK_SIZE 的整数倍。下面计算一次加密的
// 数据长度。
dwBlockLen = 1000 - 1000 % ENCRYPT_BLOCK_SIZE;
//--------------------------------------------------------------------
// Determine the block size. If a block cipher is used,
// it must have room for an extra block.
if(ENCRYPT_BLOCK_SIZE > 1)
dwBufferLen = dwBlockLen + ENCRYPT_BLOCK_SIZE;
else
dwBufferLen = dwBlockLen;
//--------------------------------------------------------------------
// Allocate memory.
if(pbBuffer = (BYTE *)malloc(dwBufferLen)) {
printf("Memory has been allocated for the buffer. \n");
} else {
HandleError("Out of memory. \n");
}
//--------------------------------------------------------------------
// In a do loop, encrypt the source file and write to the destination file.
do {
//--------------------------------------------------------------------
// Read up to dwBlockLen bytes from the source file.
dwCount = fread(pbBuffer, 1, dwBlockLen, hSource);
if(ferror(hSource)) {
HandleError("Error reading plaintext!\n");
}
//--------------------------------------------------------------------
// 加密数据
if(!CryptEncrypt(
hKey, //密钥
0, //如果数据同时进行散列和加密,这里传入一个
//散列对象
feof(hSource), //如果是最后一个被加密的块,输入TRUE.如果不是输.
//入FALSE这里通过判断是否到文件尾来决定是否为
//最后一块。
0, //保留
pbBuffer, //输入被加密数据,输出加密后的数据
&dwCount, //输入被加密数据实际长度,输出加密后数据长度
dwBufferLen)) //pbBuffer的大小。
{
HandleError("Error during CryptEncrypt. \n");
}
//--------------------------------------------------------------------
// Write data to the destination file.
fwrite(pbBuffer, 1, dwCount, hDestination);
if(ferror(hDestination)) {
HandleError("Error writing ciphertext.");
}
} while(!feof(hSource));
//--------------------------------------------------------------------
// End the do loop when the last block of the source file has been
// read, encrypted, and written to the destination file.
//--------------------------------------------------------------------
// Close files.
if(hSource)
fclose(hSource);
if(hDestination)
fclose(hDestination);
//--------------------------------------------------------------------
// Free memory.
if(pbBuffer)
free(pbBuffer);
//--------------------------------------------------------------------
// Destroy session key.
if(hKey)
CryptDestroyKey(hKey);
//--------------------------------------------------------------------
// Destroy hash object.
if(hHash)
CryptDestroyHash(hHash);
//--------------------------------------------------------------------
// Release provider handle.
if(hCryptProv)
CryptReleaseContext(hCryptProv, 0);
return(TRUE);
} // End of Encryptfile
//--------------------------------------------------------------------
// This example uses the function HandleError, a simple error
// handling function, to print an error message to the standard error
// (stderr) file and exit the program.
// For most applications, replace this function with one
// that does more extensive error reporting.
void HandleError(char *s) {
fprintf(stderr,"An error occurred in running the program. \n");
fprintf(stderr,"%s\n",s);
fprintf(stderr, "Error number %x.\n", GetLastError());
fprintf(stderr, "Program terminating. \n");
exit(1);
} // End of HandleError
int DES_DecryptBlock(char cipherBlock[8], char subKeys[16][48],char plainBlock[8]){
char cipherBits[64];
char copyRight[48];
int cnt;
Char8ToBit64(cipherBlock,cipherBits);
DES_IP_Transform(cipherBits);
for(cnt = 15; cnt >= 0; cnt--){
memcpy(copyRight,cipherBits+32,32);
DES_E_Transform(copyRight);
DES_XOR(copyRight,subKeys[cnt],48);
DES_SBOX(copyRight);
DES_P_Transform(copyRight);
DES_XOR(cipherBits,copyRight,32);
if(cnt != 0){
DES_Swap(cipherBits,cipherBits+32);
}
}
DES_IP_1_Transform(cipherBits);
Bit64ToChar8(cipherBits,plainBlock);
return 0;
}
/* 加密 */
char* DES_Encrypt(char *sourceData, int sourceSize, char *keyStr, int *resultSize){
char *destData = 0;
int destSize = sourceSize;
if(destSize % 8 != 0)
destSize += (8 - (destSize % 8));
destData = (char*)malloc(destSize);
*resultSize = destSize;
int count;
char sourceBlock[8], destBlock[8], keyBlock[8];
char bKey[64];
char subKeys[16][48];
memcpy(keyBlock, keyStr, 8);
Char8ToBit64(keyBlock,bKey);
DES_MakeSubKeys(bKey,subKeys);
int p = 0;
while(p + 8 <= sourceSize){
memcpy(sourceBlock, sourceData + p, sizeof(sourceBlock));
DES_EncryptBlock(sourceBlock, subKeys, destBlock);
memcpy(destData + p, destBlock, sizeof(destBlock));
p += 8;
}
if(p + 8 > sourceSize){
memset(sourceBlock, '\0', 8);
// sourceBlock[7] = 8 - (sourceSize % 8);
memcpy(sourceBlock, sourceData + p, sourceSize % 8);
DES_EncryptBlock(sourceBlock, subKeys, destBlock);
memcpy(destData + p, destBlock, sizeof(destBlock));
}
return destData;
}
char* DES_Decrypt(char *sourceData, int sourceSize, char *keyStr, int* resultSize){
int count,times = 0;
long fileLen;
char sourceBlock[8], destBlock[8], keyBlock[8];
char bKey[64];
char subKeys[16][48];
char *destData = (char*)malloc(sourceSize);
*resultSize = sourceSize;
memcpy(keyBlock,keyStr,8);
Char8ToBit64(keyBlock,bKey);
DES_MakeSubKeys(bKey,subKeys);
int p = 0;
while(p < sourceSize){
memcpy(sourceBlock, sourceData + p, 8);
DES_DecryptBlock(sourceBlock, subKeys, destBlock);
memcpy(destData + p, destBlock, 8);
p+= 8;
}
for(int i=0; i<sourceSize; i++){
printf("%d ", 0xFF & destData[i]);
}
printf("\r\n");
int nullCnt = destData[*resultSize - 1];
int realNullCnt = 1;
int pt = *resultSize - 2;
int pi = 6;
while(destData[pt] == '\0' && pi > 0){
pt--;
pi--;
realNullCnt++;
}
printf("nullCnt = %d, realNullCnt = %d\r\n", nullCnt, realNullCnt);
if(nullCnt != realNullCnt){
printf("aaa null byte count = %d\r\n", realNullCnt);
}else{
printf("bbb null byte count = %d\r\n", realNullCnt);
*resultSize -= realNullCnt;
char *resultData = (char*)malloc(*resultSize);
memcpy(resultData, destData, *resultSize);
free(destData);
destData = resultData;
}
return destData;
}
int _tmain(int argc, _TCHAR* argv[])
{
char* pSource = "12345678XYZ";
char *pKey = "abcdefgh";
int sourceLength = strlen(pSource);
char* source = (char*)malloc(sourceLength);
char key[8];
memcpy(source, pSource, sourceLength);
memcpy(key, pKey, 8);
char *dest;
int destSize;
printf("Source:\r\n");
for(int i=0; i<sourceLength; i++){
printf("%d ", 0xFF & source[i]);
}
printf("\r\n");
dest = DES_Encrypt(source, sourceLength, key, &destSize);
printf("Encrypt complete:\r\n");
for(int i=0; i<destSize; i++){
printf("%d ", (0xFF & dest[i]));
}
printf("\r\ndestSize = %d\r\n", destSize);
char* dest1 = DES_Decrypt(dest, destSize, key, &destSize);
printf("destSize = %d\r\n", destSize);
for(int i=0; i<destSize; i++){
printf("%c", dest1[i]);
}
printf("\r\n");
return 0;
}
#include "stdafx.h"
#include "cstring"
#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;
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};
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};
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};
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};
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}}};
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};
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};
int MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
int ByteToBit(char ch,char bit[8]);
int BitToByte(char bit[8],char *ch);
int Char8ToBit64(char ch[8],char bit[64]);
int Bit64ToChar8(char bit[64],char ch[8]);
int DES_MakeSubKeys(char key[64],char subKeys[16][48]);
int DES_PC1_Transform(char key[64], char tempbts[56]);
int DES_PC2_Transform(char key[56], char tempbts[48]);
int DES_ROL(char data[56], int time);
int DES_IP_Transform(char data[64]);
int DES_IP_1_Transform(char data[64]);
int DES_E_Transform(char data[48]);
int DES_P_Transform(char data[32]);
int DES_SBOX(char data[48]);
int DES_XOR(char R[48], char L[48],int count);
int DES_Swap(char left[32],char right[32]);
int DES_EncryptBlock(char plainBlock[8], char subKeys[16][48], char cipherBlock[8]);
int DES_DecryptBlock(char cipherBlock[8], char subKeys[16][48], char plainBlock[8]);
int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile);
int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile);
int ByteToBit(char ch, char bit[8]){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*(bit+cnt) = (ch>>cnt)&1;
}
return 0;
}
int BitToByte(char bit[8],char *ch){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*ch |= *(bit + cnt)<<cnt;
}
return 0;
}
int Char8ToBit64(char ch[8],char bit[64]){
int cnt;
for(cnt = 0; cnt < 8; cnt++){
ByteToBit(*(ch+cnt),bit+(cnt<<3));
}
return 0;
}
int Bit64ToChar8(char bit[64],char ch[8]){
int cnt;
memset(ch,0,8);
for(cnt = 0; cnt < 8; cnt++){
BitToByte(bit+(cnt<<3),ch+cnt);
}
return 0;
}
int DES_MakeSubKeys(char key[64],char subKeys[16][48]){
char temp[56];
int cnt;
DES_PC1_Transform(key,temp);
for(cnt = 0; cnt < 16; cnt++){
DES_ROL(temp,MOVE_TIMES[cnt]);
DES_PC2_Transform(temp,subKeys[cnt]);
}
return 0;
}
int DES_PC1_Transform(char key[64], char tempbts[56]){
int cnt;
for(cnt = 0; cnt < 56; cnt++){
tempbts[cnt] = key[PC_1[cnt]];
}
return 0;
}
int DES_PC2_Transform(char key[56], char tempbts[48]){
int cnt;
for(cnt = 0; cnt < 48; cnt++){
tempbts[cnt] = key[PC_2[cnt]];
}
return 0;
}
int DES_ROL(char data[56], int time){
char temp[56];
memcpy(temp,data,time);
memcpy(temp+time,data+28,time);
memcpy(data,data+time,28-time);
memcpy(data+28-time,temp,time);
memcpy(data+28,data+28+time,28-time);
memcpy(data+56-time,temp+time,time);
return 0;
}
int DES_IP_Transform(char data[64]){
int cnt;
char temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}
int DES_IP_1_Transform(char data[64]){
int cnt;
char temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_1_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}
int DES_E_Transform(char data[48]){
int cnt;
char temp[48];
for(cnt = 0; cnt < 48; cnt++){
temp[cnt] = data[E_Table[cnt]];
}
memcpy(data,temp,48);
return 0;
}
int DES_P_Transform(char data[32]){
int cnt;
char temp[32];
for(cnt = 0; cnt < 32; cnt++){
temp[cnt] = data[P_Table[cnt]];
}
memcpy(data,temp,32);
return 0;
}
int DES_XOR(char R[48], char L[48] ,int count){
int cnt;
for(cnt = 0; cnt < count; cnt++){
R[cnt] ^= L[cnt];
}
return 0;
}
int DES_SBOX(char data[48]){
int cnt;
int line,row,output;
int cur1,cur2;
for(cnt = 0; cnt < 8; cnt++){
cur1 = cnt*6;
cur2 = cnt<<2;
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];
data[cur2] = (output&0X08)>>3;
data[cur2+1] = (output&0X04)>>2;
data[cur2+2] = (output&0X02)>>1;
data[cur2+3] = output&0x01;
}
return 0;
}
int DES_Swap(char left[32], char right[32]){
char temp[32];
memcpy(temp,left,32);
memcpy(left,right,32);
memcpy(right,temp,32);
return 0;
}
int DES_EncryptBlock(char plainBlock[8], char subKeys[16][48], char cipherBlock[8]){
char plainBits[64];
char copyRight[48];
int cnt;
Char8ToBit64(plainBlock,plainBits);
DES_IP_Transform(plainBits);
for(cnt = 0; cnt < 16; cnt++){
memcpy(copyRight,plainBits+32,32);
DES_E_Transform(copyRight);
DES_XOR(copyRight,subKeys[cnt],48);
DES_SBOX(copyRight);
DES_P_Transform(copyRight);
DES_XOR(plainBits,copyRight,32);
if(cnt != 15){
DES_Swap(plainBits,plainBits+32);
}
}
DES_IP_1_Transform(plainBits);
Bit64ToChar8(plainBits,cipherBlock);
return 0;
}